Canvas: Provide sane default bounding box (For Image & Text)

Bounding box of drawables use other coordinate frame
then bounding sphere of MatrixTransform...

.cvsignore

@@ -1,19 +0,0 @@
-Makefile
-Makefile.in
-SimGear.spec
-aclocal.m4
-autom4te.cache
-config.cache
-config.log
-config.status
-configure
-do-config.sh
-.cdtproject
-.project
-config.guess
-config.sub
-depcomp
-INSTALL
-install-sh
-missing
-mkinstalldirs

.gitignore

@@ -0,0 +1,15 @@
+.*
+Makefile
+*.o
+lib*.a
+.*.swp
+cmake_install.cmake
+CMakeFiles
+CMakeCache.txt
+CPackConfig.cmake
+CPackSourceConfig.cmake
+cmake_uninstall.cmake
+CTestTestfile.cmake
+install_manifest.txt
+build*
+Build

CMakeLists.txt

@@ -0,0 +1,374 @@
+cmake_minimum_required (VERSION 2.6.4)
+include (CheckFunctionExists)
+include (CheckIncludeFile)
+include (CheckCXXSourceCompiles)
+
+
+project(SimGear)
+
+# read 'version' file into a variable (stripping any newlines or spaces)
+file(READ version versionFile)
+string(STRIP ${versionFile} SIMGEAR_VERSION)
+
+# use simgear version also as the SO version (if building SOs)
+SET(SIMGEAR_SOVERSION ${SIMGEAR_VERSION})
+
+# Warning when build is not an out-of-source build.
+string(COMPARE EQUAL "${CMAKE_SOURCE_DIR}" "${CMAKE_BINARY_DIR}" InSourceBuild)
+if(InSourceBuild)
+    message(WARNING  "Avoid building inside the source tree!")
+    message(WARNING  "Create a separate build directory instead (i.e. 'sgbuild') and call CMake from there: ")
+    message(WARNING  "  mkdir ../sgbuild && cd ../sgbuild && cmake ${CMAKE_SOURCE_DIR}")
+endif(InSourceBuild)
+
+#packaging
+SET(CPACK_RESOURCE_FILE_LICENSE "${PROJECT_SOURCE_DIR}/COPYING")
+SET(CPACK_RESOURCE_FILE_README "${PROJECT_SOURCE_DIR}/README")
+SET(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Simulation support libraries for FlightGear and related projects")
+SET(CPACK_PACKAGE_VENDOR "The FlightGear project")
+SET(CPACK_GENERATOR "TBZ2")
+SET(CPACK_INSTALL_CMAKE_PROJECTS  ${CMAKE_CURRENT_BINARY_DIR};SimGear;ALL;/)
+
+
+# split version string into components, note CMAKE_MATCH_0 is the entire regexp match
+string(REGEX MATCH "([0-9]+)\\.([0-9]+)\\.([0-9]+)" CPACK_PACKAGE_VERSION ${SIMGEAR_VERSION} )
+set(CPACK_PACKAGE_VERSION_MAJOR ${CMAKE_MATCH_1}) 
+set(CPACK_PACKAGE_VERSION_MINOR ${CMAKE_MATCH_2})
+set(CPACK_PACKAGE_VERSION_PATCH ${CMAKE_MATCH_3})
+
+message(STATUS "version is ${CPACK_PACKAGE_VERSION_MAJOR} dot ${CPACK_PACKAGE_VERSION_MINOR} dot ${CPACK_PACKAGE_VERSION_PATCH}")
+
+set(CPACK_SOURCE_GENERATOR TBZ2)
+set(CPACK_SOURCE_PACKAGE_FILE_NAME "simgear-${SIMGEAR_VERSION}" CACHE INTERNAL "tarball basename")
+set(CPACK_SOURCE_IGNORE_FILES
+  "^${PROJECT_SOURCE_DIR}/.git;\\\\.gitignore;Makefile.am;~$;${CPACK_SOURCE_IGNORE_FILES}")
+
+message(STATUS "ignoring: ${CPACK_SOURCE_IGNORE_FILES}")
+
+include (CPack)
+
+# We have some custom .cmake scripts not in the official distribution.
+set(CMAKE_MODULE_PATH "${PROJECT_SOURCE_DIR}/CMakeModules;${CMAKE_MODULE_PATH}")
+
+# Change the default build type to something fast
+if(NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE Release CACHE STRING
+      "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel."
+      FORCE)
+endif(NOT CMAKE_BUILD_TYPE)
+
+# Determine name of library installation directory, i.e. "lib" vs "lib64", which
+# differs between all Debian-based vs all other Linux distros.
+# See cmake bug #11964, http://cmake.org/gitweb?p=cmake.git;a=commit;h=126c993d
+# GNUInstallDirs requires CMake >= 2.8.5, use own file for older cmake
+if(${CMAKE_VERSION} VERSION_GREATER 2.8.4)
+  include(GNUInstallDirs)
+else(${CMAKE_VERSION} VERSION_GREATER 2.8.4)
+  include(OldGNUInstallDirs)
+endif(${CMAKE_VERSION} VERSION_GREATER 2.8.4)
+message(STATUS "Library installation directory: ${CMAKE_INSTALL_LIBDIR}")
+
+#####################################################################################
+# Configure library search paths
+#####################################################################################
+
+if(NOT "${CMAKE_LIBRARY_ARCHITECTURE}" STREQUAL "")
+    # Workaround for Ubuntu/Debian which introduced the "multiarch" library
+    # directory structure, which is unsupported by CMake < 2.8.10, so we need to
+    # add paths manually
+    # see http://www.cmake.org/Bug/view.php?id=12049 and
+    # http://www.cmake.org/Bug/view.php?id=12037
+    list(APPEND ADDITIONAL_LIBRARY_PATHS
+         /usr/local/lib/${CMAKE_LIBRARY_ARCHITECTURE}
+         /usr/lib/${CMAKE_LIBRARY_ARCHITECTURE}
+         /lib/${CMAKE_LIBRARY_ARCHITECTURE})
+    message(STATUS "additional library directories: ${ADDITIONAL_LIBRARY_PATHS}")
+endif()
+
+if(NOT MSVC)
+    # TBD: are these really necessary? Aren't they considered by cmake automatically?
+    list(APPEND ADDITIONAL_LIBRARY_PATHS
+         /opt/local
+         /usr/local
+         /usr)
+endif()
+#####################################################################################
+
+if (NOT MSVC)
+option(SIMGEAR_SHARED   "Set to ON to build SimGear as a shared library/framework" OFF)
+option(SYSTEM_EXPAT     "Set to ON to build SimGear using the system libExpat" OFF)
+else()
+# Building SimGear DLLs is currently not supported for MSVC.
+set(SIMGEAR_SHARED OFF)
+# Using a system expat is currently not supported for MSVC - it would require shared simgear (DLL).
+set(SYSTEM_EXPAT OFF)
+endif()
+
+option(SIMGEAR_HEADLESS "Set to ON to build SimGear without GUI/graphics support" OFF)
+option(JPEG_FACTORY     "Enable JPEG-factory support" OFF)
+option(ENABLE_LIBSVN    "Set to ON to build SimGear with libsvnclient support" ON)
+option(ENABLE_RTI       "Set to ON to build SimGear with RTI support" OFF)
+option(ENABLE_TESTS     "Set to OFF to disable building SimGear's test applications" ON)
+option(ENABLE_SOUND     "Set to OFF to disable building SimGear's sound support" ON)
+
+if (MSVC)
+  GET_FILENAME_COMPONENT(PARENT_DIR ${PROJECT_SOURCE_DIR} PATH)
+  if (CMAKE_CL_64)
+    SET(TEST_3RDPARTY_DIR "${PARENT_DIR}/3rdparty.x64")
+  else (CMAKE_CL_64)
+    SET(TEST_3RDPARTY_DIR "${PARENT_DIR}/3rdparty")
+  endif (CMAKE_CL_64)
+  if (EXISTS ${TEST_3RDPARTY_DIR})
+    set(MSVC_3RDPARTY_ROOT ${PARENT_DIR} CACHE PATH "Location where the third-party dependencies are extracted")
+  else (EXISTS ${TEST_3RDPARTY_DIR})
+    set(MSVC_3RDPARTY_ROOT NOT_FOUND CACHE PATH "Location where the third-party dependencies are extracted")
+  endif (EXISTS ${TEST_3RDPARTY_DIR})
+else (MSVC)
+  set(MSVC_3RDPARTY_ROOT NOT_FOUND CACHE PATH "Location where the third-party dependencies are extracted")
+endif (MSVC)
+
+if (MSVC AND MSVC_3RDPARTY_ROOT)
+  message(STATUS "3rdparty files located in ${MSVC_3RDPARTY_ROOT}")
+  set( OSG_MSVC "msvc" )
+  if (${MSVC_VERSION} EQUAL 1700)
+      set( OSG_MSVC ${OSG_MSVC}110 )
+  elseif (${MSVC_VERSION} EQUAL 1600)
+      set( OSG_MSVC ${OSG_MSVC}100 )
+  else (${MSVC_VERSION} EQUAL 1700)
+      set( OSG_MSVC ${OSG_MSVC}90 )
+  endif (${MSVC_VERSION} EQUAL 1700)
+  if (CMAKE_CL_64)
+      set( OSG_MSVC ${OSG_MSVC}-64 )
+      set( MSVC_3RDPARTY_DIR 3rdParty.x64 )
+  else (CMAKE_CL_64)
+      set( MSVC_3RDPARTY_DIR 3rdParty )
+  endif (CMAKE_CL_64)
+
+  set (CMAKE_LIBRARY_PATH ${MSVC_3RDPARTY_ROOT}/${MSVC_3RDPARTY_DIR}/lib ${MSVC_3RDPARTY_ROOT}/install/${OSG_MSVC}/OpenScenegraph/lib ${MSVC_3RDPARTY_ROOT}/install/${OSG_MSVC}/OpenRTI/lib )
+  set (CMAKE_INCLUDE_PATH ${MSVC_3RDPARTY_ROOT}/${MSVC_3RDPARTY_DIR}/include ${MSVC_3RDPARTY_ROOT}/install/${OSG_MSVC}/OpenScenegraph/include ${MSVC_3RDPARTY_ROOT}/install/${OSG_MSVC}/OpenRTI/include)
+  find_path(BOOST_ROOT boost/version.hpp
+			${MSVC_3RDPARTY_ROOT}/boost
+			${MSVC_3RDPARTY_ROOT}/boost_1_52_0
+			${MSVC_3RDPARTY_ROOT}/boost_1_51_0
+			${MSVC_3RDPARTY_ROOT}/boost_1_50_0
+			${MSVC_3RDPARTY_ROOT}/boost_1_49_0
+			${MSVC_3RDPARTY_ROOT}/boost_1_48_0
+			${MSVC_3RDPARTY_ROOT}/boost_1_47_0
+			${MSVC_3RDPARTY_ROOT}/boost_1_46_1
+			${MSVC_3RDPARTY_ROOT}/boost_1_46_0
+			${MSVC_3RDPARTY_ROOT}/boost_1_45_0
+			${MSVC_3RDPARTY_ROOT}/boost_1_44_0
+			)
+  # set (BOOST_ROOT ${MSVC_3RDPARTY_ROOT}/boost_1_44_0)
+  message(STATUS "BOOST_ROOT is ${BOOST_ROOT}")
+  set (OPENAL_INCLUDE_DIR ${MSVC_3RDPARTY_ROOT}/${MSVC_3RDPARTY_DIR}/include)
+  set (OPENAL_LIBRARY_DIR ${MSVC_3RDPARTY_ROOT}/${MSVC_3RDPARTY_DIR}/lib)
+endif (MSVC AND MSVC_3RDPARTY_ROOT)
+
+find_package(Boost REQUIRED)
+set (BOOST_CXX_FLAGS "-DBOOST_MULTI_INDEX_DISABLE_SERIALIZATION -DBOOST_BIMAP_DISABLE_SERIALIZATION")
+
+if(SIMGEAR_HEADLESS)
+    message(STATUS "SimGear mode: HEADLESS")
+    set(ENABLE_SOUND 0)
+else()
+    message(STATUS "SimGear mode: NORMAL")
+    find_package(OpenGL REQUIRED)
+    
+    if (ENABLE_SOUND)
+        find_package(OpenAL REQUIRED)
+        message(STATUS "Sound support: ENABLED")
+    endif(ENABLE_SOUND)
+    
+    find_package(OpenSceneGraph 3.0.0 REQUIRED osgText osgSim osgDB osgParticle osgGA osgUtil)
+endif(SIMGEAR_HEADLESS)
+
+if(JPEG_FACTORY)
+    message(STATUS "JPEG-factory: ENABLED")
+    find_package(JPEG REQUIRED)
+    include_directories(${JPEG_INCLUDE_DIR})
+else()
+    message(STATUS "JPEG-factory: DISABLED")
+endif(JPEG_FACTORY)
+
+if(ENABLE_LIBSVN)
+    find_package(SvnClient)
+
+    if(LIBSVN_FOUND)
+        message(STATUS "Subversion client support: ENABLED")
+        set(HAVE_SVN_CLIENT_H 1)
+        set(HAVE_LIBSVN_CLIENT_1 1)
+    else()
+        # Oops. ENABLE_LIBSVN is ON, but svn is still missing.
+        # Provide clearly visible warning/hint, so builders know what else they should install (or disable).
+        message(WARNING "Failed to enable subversion client support. Unable to find required subversion client library. Some features may not be available (scenery download).")
+        message(WARNING "Install 'libsvn' library/DLL (libsvn-devel/libsvnclient/...). Otherwise disable subversion support (set 'ENABLE_LIBSVN' to 'OFF').")
+    endif(LIBSVN_FOUND)
+else()
+    message(STATUS "Subversion client support: DISABLED")
+endif(ENABLE_LIBSVN)
+
+find_package(ZLIB REQUIRED)
+find_package(Threads REQUIRED)
+
+if (SYSTEM_EXPAT)
+    message(STATUS "Requested to use system Expat library, forcing SIMGEAR_SHARED to true")
+    set(SIMGEAR_SHARED ON)
+    find_package(EXPAT REQUIRED)
+    include_directories(${EXPAT_INCLUDE_DIRS})
+else()
+    message(STATUS "Using built-in expat code")
+    add_definitions(-DHAVE_EXPAT_CONFIG_H)
+endif(SYSTEM_EXPAT)
+
+check_include_file(inttypes.h HAVE_INTTYPES_H)
+check_include_file(sys/time.h HAVE_SYS_TIME_H)
+check_include_file(sys/timeb.h HAVE_SYS_TIMEB_H)
+check_include_file(unistd.h HAVE_UNISTD_H)
+check_include_file(windows.h HAVE_WINDOWS_H)
+
+if(HAVE_INTTYPES_H)
+  # ShivaVG needs inttypes.h
+  add_definitions(-DHAVE_INTTYPES_H)
+endif()
+
+if(ENABLE_RTI)
+    # See if we have any rti library variant installed
+    message(STATUS "RTI: ENABLED")
+    find_package(RTI)
+else()
+    message(STATUS "RTI: DISABLED")
+endif(ENABLE_RTI)
+
+check_function_exists(gettimeofday HAVE_GETTIMEOFDAY)
+check_function_exists(ftime HAVE_FTIME)
+check_function_exists(timegm HAVE_TIMEGM)
+check_function_exists(rint HAVE_RINT)
+check_function_exists(mkdtemp HAVE_MKDTEMP)
+check_function_exists(bcopy HAVE_BCOPY)
+check_function_exists(mmap HAVE_MMAP)
+
+if(HAVE_UNISTD_H)
+    set(CMAKE_REQUIRED_INCLUDES ${CMAKE_INCLUDE_PATH})
+    check_cxx_source_compiles(
+       "#include <unistd.h>
+        #if !defined(_POSIX_TIMERS) || (0 >= _POSIX_TIMERS)
+            #error clock_gettime is not supported
+        #endif
+
+        int main() { return 0; }
+        "
+        HAVE_CLOCK_GETTIME)
+endif(HAVE_UNISTD_H)
+
+set(RT_LIBRARY "")
+if(HAVE_CLOCK_GETTIME)
+    check_library_exists(rt clock_gettime "" HAVE_RT)
+    if(HAVE_RT)
+        set(RT_LIBRARY rt)
+    endif(HAVE_RT)
+endif(HAVE_CLOCK_GETTIME)
+
+SET(CMAKE_DEBUG_POSTFIX "d" CACHE STRING "add a postfix, usually 'd' on windows")
+SET(CMAKE_RELEASE_POSTFIX "" CACHE STRING "add a postfix, usually empty on windows")
+SET(CMAKE_RELWITHDEBINFO_POSTFIX "" CACHE STRING "add a postfix, usually empty on windows")
+SET(CMAKE_MINSIZEREL_POSTFIX "" CACHE STRING "add a postfix, usually empty on windows")
+
+# isnan might not be real symbol, so can't check using function_exists
+check_cxx_source_compiles(
+    "#include <cmath> 
+    void f() { isnan(0.0);} "
+    HAVE_ISNAN)
+
+check_cxx_source_compiles(
+    "#include <cmath> 
+    void f() { std::isnan(0.0);} "
+    HAVE_STD_ISNAN)
+
+if(CMAKE_COMPILER_IS_GNUCXX)
+    set(WARNING_FLAGS_CXX "-Wall")
+    set(WARNING_FLAGS_C   "-Wall")
+
+    # certain GCC versions don't provide the atomic builds, and hence
+    # require is to provide them in SGAtomic.cxx
+    set(CMAKE_REQUIRED_INCLUDES ${CMAKE_INCLUDE_PATH})
+    check_cxx_source_compiles(
+       "int main() { unsigned mValue; return __sync_add_and_fetch(&mValue, 1); }"
+        GCC_ATOMIC_BUILTINS_FOUND)
+endif(CMAKE_COMPILER_IS_GNUCXX)
+
+if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+   set(WARNING_FLAGS_CXX "-Wall -Wno-overloaded-virtual")
+   set(WARNING_FLAGS_C   "-Wall")
+endif()
+
+if(WIN32)
+
+    if(MINGW)
+        add_definitions(-D_WIN32_WINNT=0x501)
+    endif()
+
+    if(MSVC)
+        # turn off various warnings
+        # foreach(warning 4244 4251 4267 4275 4290 4786 4305 4996)
+        #     SET(WARNING_FLAGS "${WARNING_FLAGS} /wd${warning}")
+        # endforeach(warning)
+        
+        set(MSVC_FLAGS "-DWIN32 -DNOMINMAX -D_USE_MATH_DEFINES -D_CRT_SECURE_NO_WARNINGS -D__CRT_NONSTDC_NO_WARNINGS /wd4996 /wd4250")
+    endif(MSVC)
+    
+    # assumed on Windows
+    set(HAVE_GETLOCALTIME 1)
+    
+    set( WINSOCK_LIBRARY "ws2_32.lib" )
+    set( RT_LIBRARY "winmm" )
+endif(WIN32)
+
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${WARNING_FLAGS_C} ${MSVC_FLAGS}")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${WARNING_FLAGS_CXX} ${MSVC_FLAGS} ${BOOST_CXX_FLAGS}")
+
+include_directories(${PROJECT_SOURCE_DIR})
+include_directories(${PROJECT_SOURCE_DIR}/simgear/canvas/ShivaVG/include)
+include_directories(${PROJECT_BINARY_DIR}/simgear)
+include_directories(${PROJECT_BINARY_DIR}/simgear/xml)
+
+include_directories(${OPENSCENEGRAPH_INCLUDE_DIRS} 
+    ${Boost_INCLUDE_DIRS} ${ZLIB_INCLUDE_DIR} 
+    ${OPENAL_INCLUDE_DIR} )
+
+add_definitions(-DHAVE_CONFIG_H)
+
+# configure a header file to pass some of the CMake settings
+# to the source code
+configure_file (
+  "${PROJECT_SOURCE_DIR}/simgear/simgear_config_cmake.h.in"
+  "${PROJECT_BINARY_DIR}/simgear/simgear_config.h"
+  )
+
+configure_file (
+    "${PROJECT_SOURCE_DIR}/simgear/xml/expat_config_cmake.in"
+    "${PROJECT_BINARY_DIR}/simgear/xml/expat_config.h"
+)
+
+if(ENABLE_TESTS)
+    # enable CTest / make test target
+    message(STATUS "Tests: ENABLED")
+
+    include (Dart)
+        enable_testing()
+else()
+    message(STATUS "Tests: DISABLED")
+endif(ENABLE_TESTS)
+
+install (FILES ${PROJECT_BINARY_DIR}/simgear/simgear_config.h  DESTINATION include/simgear/)
+add_subdirectory(simgear)
+
+#-----------------------------------------------------------------------------
+### uninstall target
+#-----------------------------------------------------------------------------
+CONFIGURE_FILE(
+  "${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules/cmake_uninstall.cmake.in"
+  "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
+  IMMEDIATE @ONLY)
+ADD_CUSTOM_TARGET(uninstall
+  "${CMAKE_COMMAND}" -P "${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake")

CMakeModules/FindSvnClient.cmake

@@ -0,0 +1,83 @@
+# Find Subversion client libraries, and dependencies
+# including APR (Apache Portable Runtime)
+
+include (CheckFunctionExists)
+include (CheckIncludeFile)
+include (CheckLibraryExists)
+
+macro(find_static_component comp libs)
+    # account for alternative Windows svn distribution naming
+    if(MSVC)
+      set(compLib "lib${comp}")
+    else(MSVC)
+      set(compLib "${comp}")
+    endif(MSVC)
+    
+    string(TOUPPER "${comp}" compLibBase)
+    set( compLibName ${compLibBase}_LIBRARY )
+
+    # NO_DEFAULT_PATH is important on Mac - we need to ensure subversion
+    # libraires in dist/ or Macports are picked over the Apple version 
+    # in /usr, since that's what we will ship.
+    # On other platforms we do need default paths though, i.e. since Linux
+    # distros may use architecture-specific directories (like
+    # /usr/lib/x86_64-linux-gnu) which we cannot hardcode/guess here.
+    FIND_LIBRARY(${compLibName}
+if(APPLE)
+      NO_DEFAULT_PATH
+endif(APPLE)
+      NAMES ${compLib}
+      HINTS $ENV{LIBSVN_DIR} ${CMAKE_INSTALL_PREFIX} ${MSVC_3RDPARTY_ROOT}/${MSVC_3RDPARTY_DIR}/lib
+      PATH_SUFFIXES lib64 lib libs64 libs libs/Win32 libs/Win64
+      PATHS ${ADDITIONAL_LIBRARY_PATHS}
+    )
+
+	list(APPEND ${libs} ${${compLibName}})
+endmacro()
+
+find_program(HAVE_APR_CONFIG apr-1-config)
+if(HAVE_APR_CONFIG) 
+        
+    execute_process(COMMAND apr-1-config --cppflags --includes
+        OUTPUT_VARIABLE APR_CFLAGS
+        OUTPUT_STRIP_TRAILING_WHITESPACE)
+        
+    execute_process(COMMAND apr-1-config --link-ld
+        OUTPUT_VARIABLE RAW_APR_LIBS
+        OUTPUT_STRIP_TRAILING_WHITESPACE)
+    
+# clean up some vars, or other CMake pieces complain
+	string(STRIP "${RAW_APR_LIBS}" APR_LIBS)
+
+else(HAVE_APR_CONFIG)
+    message(STATUS "apr-1-config not found, implement manual search for APR")
+endif(HAVE_APR_CONFIG)
+
+if(HAVE_APR_CONFIG OR MSVC)
+	find_path(LIBSVN_INCLUDE_DIR svn_client.h
+      NO_DEFAULT_PATH
+	  HINTS
+	  $ENV{LIBSVN_DIR} ${CMAKE_INSTALL_PREFIX} ${MSVC_3RDPARTY_ROOT}/${MSVC_3RDPARTY_DIR}/include
+	  PATH_SUFFIXES include/subversion-1
+	  PATHS
+      /opt/local
+	  /usr/local
+	  /usr
+	)
+	
+	set(LIBSVN_LIBRARIES "")
+	if (MSVC)
+		find_static_component("apr-1" LIBSVN_LIBRARIES)
+	else (MSVC)
+		list(APPEND LIBSVN_LIBRARIES ${APR_LIBS})
+	endif (MSVC)
+	find_static_component("svn_client-1" LIBSVN_LIBRARIES)
+	find_static_component("svn_subr-1" LIBSVN_LIBRARIES)
+	find_static_component("svn_ra-1" LIBSVN_LIBRARIES)
+
+	include(FindPackageHandleStandardArgs)
+	FIND_PACKAGE_HANDLE_STANDARD_ARGS(LIBSVN DEFAULT_MSG LIBSVN_LIBRARIES LIBSVN_INCLUDE_DIR)
+        if(NOT LIBSVN_FOUND)
+		set(LIBSVN_LIBRARIES "")
+        endif(NOT LIBSVN_FOUND)
+endif(HAVE_APR_CONFIG OR MSVC)

CMakeModules/OldGNUInstallDirs.cmake

@@ -0,0 +1,182 @@
+# - Define GNU standard installation directories
+# Provides install directory variables as defined for GNU software:
+#  http://www.gnu.org/prep/standards/html_node/Directory-Variables.html
+# Inclusion of this module defines the following variables:
+#  CMAKE_INSTALL_<dir>      - destination for files of a given type
+#  CMAKE_INSTALL_FULL_<dir> - corresponding absolute path
+# where <dir> is one of:
+#  BINDIR           - user executables (bin)
+#  SBINDIR          - system admin executables (sbin)
+#  LIBEXECDIR       - program executables (libexec)
+#  SYSCONFDIR       - read-only single-machine data (etc)
+#  SHAREDSTATEDIR   - modifiable architecture-independent data (com)
+#  LOCALSTATEDIR    - modifiable single-machine data (var)
+#  LIBDIR           - object code libraries (lib or lib64)
+#  INCLUDEDIR       - C header files (include)
+#  OLDINCLUDEDIR    - C header files for non-gcc (/usr/include)
+#  DATAROOTDIR      - read-only architecture-independent data root (share)
+#  DATADIR          - read-only architecture-independent data (DATAROOTDIR)
+#  INFODIR          - info documentation (DATAROOTDIR/info)
+#  LOCALEDIR        - locale-dependent data (DATAROOTDIR/locale)
+#  MANDIR           - man documentation (DATAROOTDIR/man)
+#  DOCDIR           - documentation root (DATAROOTDIR/doc/PROJECT_NAME)
+# Each CMAKE_INSTALL_<dir> value may be passed to the DESTINATION options of
+# install() commands for the corresponding file type.  If the includer does
+# not define a value the above-shown default will be used and the value will
+# appear in the cache for editing by the user.
+# Each CMAKE_INSTALL_FULL_<dir> value contains an absolute path constructed
+# from the corresponding destination by prepending (if necessary) the value
+# of CMAKE_INSTALL_PREFIX.
+
+#=============================================================================
+# Copyright 2011 Nikita Krupen'ko <krnekit@gmail.com>
+# Copyright 2011 Kitware, Inc.
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file Copyright.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+# Installation directories
+#
+if(NOT DEFINED CMAKE_INSTALL_BINDIR)
+  set(CMAKE_INSTALL_BINDIR "bin" CACHE PATH "user executables (bin)")
+endif()
+
+if(NOT DEFINED CMAKE_INSTALL_SBINDIR)
+  set(CMAKE_INSTALL_SBINDIR "sbin" CACHE PATH "system admin executables (sbin)")
+endif()
+
+if(NOT DEFINED CMAKE_INSTALL_LIBEXECDIR)
+  set(CMAKE_INSTALL_LIBEXECDIR "libexec" CACHE PATH "program executables (libexec)")
+endif()
+
+if(NOT DEFINED CMAKE_INSTALL_SYSCONFDIR)
+  set(CMAKE_INSTALL_SYSCONFDIR "etc" CACHE PATH "read-only single-machine data (etc)")
+endif()
+
+if(NOT DEFINED CMAKE_INSTALL_SHAREDSTATEDIR)
+  set(CMAKE_INSTALL_SHAREDSTATEDIR "com" CACHE PATH "modifiable architecture-independent data (com)")
+endif()
+
+if(NOT DEFINED CMAKE_INSTALL_LOCALSTATEDIR)
+  set(CMAKE_INSTALL_LOCALSTATEDIR "var" CACHE PATH "modifiable single-machine data (var)")
+endif()
+
+if(NOT DEFINED CMAKE_INSTALL_LIBDIR)
+  set(_LIBDIR_DEFAULT "lib")
+  # Override this default 'lib' with 'lib64' iff:
+  #  - we are on Linux system but NOT cross-compiling
+  #  - we are NOT on debian
+  #  - we are on a 64 bits system
+  # reason is: amd64 ABI: http://www.x86-64.org/documentation/abi.pdf
+  # Note that the future of multi-arch handling may be even
+  # more complicated than that: http://wiki.debian.org/Multiarch
+  if(CMAKE_SYSTEM_NAME MATCHES "Linux"
+      AND NOT CMAKE_CROSSCOMPILING
+      AND NOT EXISTS "/etc/debian_version")
+    if(NOT DEFINED CMAKE_SIZEOF_VOID_P)
+      message(AUTHOR_WARNING
+        "Unable to determine default CMAKE_INSTALL_LIBDIR directory because no target architecture is known. "
+        "Please enable at least one language before including GNUInstallDirs.")
+    else()
+      if("${CMAKE_SIZEOF_VOID_P}" EQUAL "8")
+        set(_LIBDIR_DEFAULT "lib64")
+      endif()
+    endif()
+  endif()
+  set(CMAKE_INSTALL_LIBDIR "${_LIBDIR_DEFAULT}" CACHE PATH "object code libraries (${_LIBDIR_DEFAULT})")
+endif()
+
+if(NOT DEFINED CMAKE_INSTALL_INCLUDEDIR)
+  set(CMAKE_INSTALL_INCLUDEDIR "include" CACHE PATH "C header files (include)")
+endif()
+
+if(NOT DEFINED CMAKE_INSTALL_OLDINCLUDEDIR)
+  set(CMAKE_INSTALL_OLDINCLUDEDIR "/usr/include" CACHE PATH "C header files for non-gcc (/usr/include)")
+endif()
+
+if(NOT DEFINED CMAKE_INSTALL_DATAROOTDIR)
+  set(CMAKE_INSTALL_DATAROOTDIR "share" CACHE PATH "read-only architecture-independent data root (share)")
+endif()
+
+#-----------------------------------------------------------------------------
+# Values whose defaults are relative to DATAROOTDIR.  Store empty values in
+# the cache and store the defaults in local variables if the cache values are
+# not set explicitly.  This auto-updates the defaults as DATAROOTDIR changes.
+
+if(NOT CMAKE_INSTALL_DATADIR)
+  set(CMAKE_INSTALL_DATADIR "" CACHE PATH "read-only architecture-independent data (DATAROOTDIR)")
+  set(CMAKE_INSTALL_DATADIR "${CMAKE_INSTALL_DATAROOTDIR}")
+endif()
+
+if(NOT CMAKE_INSTALL_INFODIR)
+  set(CMAKE_INSTALL_INFODIR "" CACHE PATH "info documentation (DATAROOTDIR/info)")
+  set(CMAKE_INSTALL_INFODIR "${CMAKE_INSTALL_DATAROOTDIR}/info")
+endif()
+
+if(NOT CMAKE_INSTALL_LOCALEDIR)
+  set(CMAKE_INSTALL_LOCALEDIR "" CACHE PATH "locale-dependent data (DATAROOTDIR/locale)")
+  set(CMAKE_INSTALL_LOCALEDIR "${CMAKE_INSTALL_DATAROOTDIR}/locale")
+endif()
+
+if(NOT CMAKE_INSTALL_MANDIR)
+  set(CMAKE_INSTALL_MANDIR "" CACHE PATH "man documentation (DATAROOTDIR/man)")
+  set(CMAKE_INSTALL_MANDIR "${CMAKE_INSTALL_DATAROOTDIR}/man")
+endif()
+
+if(NOT CMAKE_INSTALL_DOCDIR)
+  set(CMAKE_INSTALL_DOCDIR "" CACHE PATH "documentation root (DATAROOTDIR/doc/PROJECT_NAME)")
+  set(CMAKE_INSTALL_DOCDIR "${CMAKE_INSTALL_DATAROOTDIR}/doc/${PROJECT_NAME}")
+endif()
+
+#-----------------------------------------------------------------------------
+
+mark_as_advanced(
+  CMAKE_INSTALL_BINDIR
+  CMAKE_INSTALL_SBINDIR
+  CMAKE_INSTALL_LIBEXECDIR
+  CMAKE_INSTALL_SYSCONFDIR
+  CMAKE_INSTALL_SHAREDSTATEDIR
+  CMAKE_INSTALL_LOCALSTATEDIR
+  CMAKE_INSTALL_LIBDIR
+  CMAKE_INSTALL_INCLUDEDIR
+  CMAKE_INSTALL_OLDINCLUDEDIR
+  CMAKE_INSTALL_DATAROOTDIR
+  CMAKE_INSTALL_DATADIR
+  CMAKE_INSTALL_INFODIR
+  CMAKE_INSTALL_LOCALEDIR
+  CMAKE_INSTALL_MANDIR
+  CMAKE_INSTALL_DOCDIR
+  )
+
+# Result directories
+#
+foreach(dir
+    BINDIR
+    SBINDIR
+    LIBEXECDIR
+    SYSCONFDIR
+    SHAREDSTATEDIR
+    LOCALSTATEDIR
+    LIBDIR
+    INCLUDEDIR
+    OLDINCLUDEDIR
+    DATAROOTDIR
+    DATADIR
+    INFODIR
+    LOCALEDIR
+    MANDIR
+    DOCDIR
+    )
+  if(NOT IS_ABSOLUTE ${CMAKE_INSTALL_${dir}})
+    set(CMAKE_INSTALL_FULL_${dir} "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_${dir}}")
+  else()
+    set(CMAKE_INSTALL_FULL_${dir} "${CMAKE_INSTALL_${dir}}")
+  endif()
+endforeach()

CMakeModules/SimGearComponent.cmake

@@ -0,0 +1,29 @@
+
+macro(simgear_component_common name includePath sourcesList sources headers)
+    set(fc${sourcesList} ${name})
+    set(fh${sourcesList} ${name})
+    foreach(s ${sources})
+        set_property(GLOBAL
+            APPEND PROPERTY ${sourcesList} "${CMAKE_CURRENT_SOURCE_DIR}/${s}")
+        set(fc${sourcesList} "${fc${sourcesList}}#${CMAKE_CURRENT_SOURCE_DIR}/${s}")
+    endforeach()
+
+	foreach(h ${headers})
+		set_property(GLOBAL
+			APPEND PROPERTY PUBLIC_HEADERS "${CMAKE_CURRENT_SOURCE_DIR}/${h}")
+        set(fh${sourcesList} "${fh${sourcesList}}#${CMAKE_CURRENT_SOURCE_DIR}/${h}")
+	endforeach()
+
+    set_property(GLOBAL APPEND PROPERTY FG_GROUPS_${sourcesList}_C "${fc${sourcesList}}@")
+    set_property(GLOBAL APPEND PROPERTY FG_GROUPS_${sourcesList}_H "${fh${sourcesList}}@")
+    
+    install (FILES ${headers}  DESTINATION include/simgear/${includePath})
+endmacro()
+
+function(simgear_component name includePath sources headers)
+    simgear_component_common(${name} ${includePath} CORE_SOURCES "${sources}" "${headers}")
+endfunction()
+
+function(simgear_scene_component name includePath sources headers)
+    simgear_component_common(${name} ${includePath} SCENE_SOURCES "${sources}" "${headers}")
+endfunction()

CMakeModules/cmake_uninstall.cmake.in

@@ -0,0 +1,22 @@
+IF(NOT EXISTS "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt")
+    MESSAGE(FATAL_ERROR "Cannot find install manifest: \"@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt\"")
+ENDIF()
+
+FILE(READ "@CMAKE_CURRENT_BINARY_DIR@/install_manifest.txt" files)
+STRING(REGEX REPLACE "\n" ";" files "${files}")
+
+FOREACH(file ${files})
+    MESSAGE(STATUS "Uninstalling \"${file}\"")
+    IF(EXISTS "${file}")
+        EXEC_PROGRAM(
+            "@CMAKE_COMMAND@" ARGS "-E remove \"${file}\""
+            OUTPUT_VARIABLE rm_out
+            RETURN_VALUE rm_retval
+            )
+        IF(NOT "${rm_retval}" STREQUAL 0)
+            MESSAGE(FATAL_ERROR "Problem when removing \"${file}\"")
+        ENDIF()
+    ELSE()
+        MESSAGE(STATUS "File \"${file}\" does not exist.")
+    ENDIF()
+ENDFOREACH()

COPYING

@@ -2,7 +2,7 @@
                        Version 2, June 1991
 
  Copyright (C) 1991 Free Software Foundation, Inc.
-                    59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
@@ -464,7 +464,7 @@ convey the exclusion of warranty; and each file should have at least the
 
     You should have received a copy of the GNU Library General Public
     License along with this library; if not, write to the Free
-    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
 
 Also add information on how to contact you by electronic and paper mail.
 

Doxyfile

@@ -22,7 +22,7 @@ PROJECT_NAME           = SimGear
 # This could be handy for archiving the generated documentation or 
 # if some version control system is used.
 
-PROJECT_NUMBER         = 0.3.10
+PROJECT_NUMBER         = 2.2.0
 
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) 
 # base path where the generated documentation will be put. 

INSTALL

@@ -0,0 +1,56 @@
+How to build SimGear
+====================
+
+SimGear uses the CMake build system to generate a platform-specific
+build environment.  CMake reads the CMakeLists.txt files that you'll
+find throughout the source directories, checks for installed
+dependencies and then generates the appropriate build system.
+
+If you don't already have CMake installed on your system you can grab
+it from http://www.cmake.org, use version 2.6.4 or later.
+
+Under unices (i.e. Linux, Solaris, Free-BSD, HP-Ux, OSX) use the cmake
+or ccmake command-line utils. Preferably, create an out-of-source
+build directory and run cmake or ccmake from there. The advantage to
+this approach is that the temporary files created by CMake won't
+clutter the source directory, and also makes it possible to have
+multiple independent build targets by creating multiple build
+directories. In a directory alongside the SimGear source directory
+use:
+
+    mkdir sgbuild
+    cd sgbuild
+    cmake ../simgear -DCMAKE_BUILD_TYPE=Release
+    make
+    sudo make install
+
+
+Build Dependencies
+==================
+SimGear depends on a number of 3rd party libraries, the most notable
+being:
+
+* OpenSceneGraph (OSG) - see README.OSG
+* zlib compression library - see README.zlib
+* Open Audio Library (OpenAL) - see README.OpenAL
+* Subversion Client Library (optional dependency)
+
+
+Further information
+===================
+* README.cmake
+  for more detailed CMake instructions
+
+* README.msvc
+  in the FlightGear source package for more Windows-specific instructions
+
+* FlightGear Wiki
+  http://wiki.flightgear.org/Building_Flightgear
+
+* FlightGear Forums
+  For help on building see: http://www.flightgear.org/forums
+  => Support/Compiling
+
+* FlightGear Mailing lists
+  http://wiki.flightgear.org/index.php/Mailing_list
+

Makefile.am

@@ -1,22 +0,0 @@
-EXTRA_DIST = \
-	acinclude.m4 \
-	autogen.sh \
-	DoxygenMain.cxx \
-	README.MSVC \
-	README.zlib \
-        projects \
-	SimGear.dsp \
-	SimGear.dsw
-
-SUBDIRS	= simgear
-
-dist-hook:
-	(cd $(top_srcdir); $(HOME)/Projects/FlightGear/admin/am2dsp.pl)
-	rm -rf `find $(distdir)/projects -name CVS`
-
-#
-# Rule to build RPM distribution package
-#
-rpm: dist
-	rpm -ta $(PACKAGE)-$(VERSION).tar.gz
-

NEWS

@@ -1,3 +1,15 @@
+Version 1.9.0
+* Thu Dec 18 15:12:15 CST 2008
+
+
+Version 1.8.6
+* Mon Dec  1 14:02:47 CST 2008
+
+
+Version 1.8.5
+* October 30, 2008 (source code snapshot release)
+
+
 New in 0.3.10
 * April 5, 2006
 

README

@@ -1 +1,15 @@
-[ Nothing here at this time. ]
+SimGear - Simulator Construction Tools
+======================================
+http://www.flightgear.org
+
+SimGear is a set of open-source libraries designed to be used as building
+blocks for quickly assembling 3d simulations, games, and visualization
+applications.
+
+SimGear is developed by the FlightGear project and also provides the base
+for the FlightGear Flight Simulator.
+
+Source code for SimGear is released under the GNU Library General Public
+License (LGPL) - see COPYING for license details.
+
+See INSTALL file for help on building SimGear.

README.MSVC

@@ -1,24 +0,0 @@
-This document describes how to build SimGear using the supplied workspace and
-project files.  
-
-Unpack the SimGear source file into your work directory.  This creates a new
-subdirectory called SimGear-X.Y.Z.  Rename this to SimGear.  Before we can
-build SimGear you must unpack and build the third party libraries metakit and
-zlib.  Sources for these are included in the SimGear/src-libs directory.
-Unpack these into the top level SimGear directory.  At this point your
-directory structure should look something like this:
-
-<work_dir>/
-  SimGear/
-    metakit-x.y.z/
-    simgear/
-    src-libs/
-    zlib-x.y.z/
-
-Now open the SimGear workspace.  This workspace file contains projects for
-building metakit(mklib), SimGear and zlib.  Select each project as the active
-project and build all.  Order is unimportant since there are no dependencies
-between the projects.
-
-The workspace and project files are generated by a perl script with extra
-input from the am2dsp.cfg file.

README.OSG

@@ -0,0 +1,26 @@
+[This file is mirrored in both the FlightGear and SimGear packages.]
+
+You *must* have OpenSceneGraph (OSG) installed to build this version of
+FlightGear.
+
+Notice that this version of SimGear/FlightGear requires at least OSG 3.0.0.
+
+You can get the latest version of OSG from:
+
+http://www.openscenegraph.org/
+
+Build notes:
+
+Unzip the file OpenSceneGraph-x.x.zip and install using the following
+commands:
+
+unzip OpenSceneGraph-x.x
+cd OpenSceneGraph
+ccmake .
+
+[ While running ccmake: press 'c' to configure, press 'c' once more, and
+  then press 'g' to generate and exit ]
+
+make
+sudo make install
+

README.OpenAL

@@ -3,10 +3,18 @@
 You *must* have the development components of OpenAL installed on your system
 to build FlightGear!"  You can get a copy here:
 
-    http://www.openal.org
+      http://connect.creativelabs.com/openal/default.aspx
 
 Build notes:
 
-The OpenAL developers do not make "versioned" releases so we recommend that
-you pull the latest version via anonymous CVS (follow the instructions at
-the OpenAL web site) and build/install that.
+You can download a versioned release of the openal library from 
+http://www.openal.org/downloads.html. Download the openal source,
+release 0.0.8 (dated February 11, 2006) and run:  
+tar xjvf openal-soft-1.5.304.tar.bz2
+cd openal-soft-1.5.304/
+ccmake .
+
+[ While running ccmake: press 'c' to configure, press 'c' once more, and
+  then press 'g' to generate and exit ]
+
+

README.cmake

@@ -0,0 +1,161 @@
+Getting started with CMake
+==========================
+
+(These instructions apply to Unix-like systems, including Cygwin and Mac. To
+build using Visual Studio or some other IDE supported by CMake, most of the
+information below still applies. Otherwise see
+http://wiki.flightgear.org/Building_Flightgear for Windows specific build
+instructions.)
+
+Always compile in a separate directory to the code. For example, if the
+code (eg, from Git) is at /home/curt/projects/simgear, you might create
+/home/curt/projects/sgbuild. Change into the new directory, and run
+
+    cmake ../simgear
+
+To generate standard Unix Makefiles in sgbuild.
+
+Probably you want to specify an install prefix:
+
+    cmake ../simgear -DCMAKE_INSTALL_PREFIX=/usr
+
+Note the install prefix is automatically searched for required libraries
+and header files, so if you install OpenSceneGraph to the same prefix,
+most configuration options are unnecessary.
+
+If for some reason you have a dependency (or several) at a different prefix,
+you can specify one or more via CMAKE_PREFIX_PATH:
+
+    cmake ../simgear -DCMAKE_PREFIX_PATH="/opt/local;/opt/fgfs"
+
+(note the use of semi-colons to specify multiple prefix paths)
+
+Standard prefixes are searched automatically (/usr, /usr/local, /opt/local)
+
+Most dependencies also expose an environment variable to specify their
+installation directory explicitly eg OSG_DIR. Any of the methods
+described above will work, but specifying an INSTALL_PREFIX or PREFIX_PATH is
+usually simpler.
+
+By default, we select a release build. To create a debug build, use
+
+    cmake ../simgear -DCMAKE_BUILD_TYPE=Debug
+
+(or MinSizeRel, or RelWithDbg)
+
+Debug builds will automatically use corresponding debug builds of required
+libraries, if they are available. For example you can install debug builds of
+OpenSceneGraph, and a debug SimGear build will use them.
+
+(Debug builds of libraries have the 'd' suffix by default - Release builds
+have no additional suffix)
+
+Note most IDE projects (eg Xcode and Visual Studio) support building all the
+build types from the same project, so you can omit the CMAKE_BUILD_TYPE option
+when running cmake, and simply pick the build configuration as normal in the
+IDE.
+
+It's common to have several build directories with different build
+configurations, eg
+
+    /home/curt/projects/simgear (the git clone)
+    /home/curt/projects/sgdebug
+    /home/curt/projects/sgrelease
+    /home/curt/projects/sg-with-svn-osg
+
+To set an optional feature, do
+
+    cmake ../simgear -DFEATURE_NAME=ON
+
+(or 'OFF' to disable )
+
+To see the variables that can be configured / are currently defined, you can
+run one of the GUI front ends, or the following command:
+
+    cmake ../simgear -L
+
+Add 'A' to see all the options (including advanced options), or 'H' to see
+the help for each option (similar to running configure --help under autoconf):
+
+    cmake ../simgear -LH
+
+
+Build Targets
+=============
+
+For a Unix makefile build, 'make dist', 'make uninstall' and 'make test' are
+all available and should work as expected. 'make clean' is also as normal,
+but there is *no* 'make distclean' target. The equivalent is to completely
+remove your build directory, and start with a fresh one.
+
+Adding new files to the build
+
+Add source files to the SOURCES list, and headers to the HEADERS list. Note
+technically you only need to add source files, but omitting headers confuses
+project generation and distribution / packaging targets.
+
+For target conditional files, you can append to the SOURCES or HEADERS lists
+inside an if() test, for example:
+
+    if(APPLE)
+        list(APPEND SOURCES extraFile1.cxx extraFile2.cxx)
+    endif()
+
+Setting include directories
+
+In any CMakeList.txt, you can do the following:
+
+    include_directories(${PROJECT_SOURCE_DIR}/some/path)
+
+For example, this can be done in particular subdirectory, or at the project
+root, or an intermediate level.
+
+Setting target specific compile flags, includes or defines
+
+Use set_target_property(), for example
+
+    set_target_property(fgfs PROPERTIES
+            COMPILE_DEFINITIONS FOO BAR=1)
+
+You can set a property on an individual source file:
+
+    set_property(SOURCE myfile.cxx PROPERTY COMPILE_FLAGS "-Wno-unsigned-compare")
+
+Detecting Features / Libraries
+
+For most standard libraries (Gtk, wxWidget, Python, GDAL, Qt, libXml, Boost),
+cmake provides a standard helper. To see the available modules, run:
+
+     cmake --help-module-list
+
+In the root CMakeLists file, use a statement like:
+
+    find_package(OpenGL REQUIRED)
+
+Each package helper sets various variables such aaa_FOUND, aaa_INCLUDE_DIR,
+and aaa_LIBRARY. Depending on the complexity of the package, these variables
+might have different names (eg, OPENSCENEGRAPH_LIBRARIES).
+
+If there's no standard helper for a library you need, find a similar one, copy
+it to CMakeModules/FindABC.cmake, and modify the code to fit. Generally this
+is pretty straightforward. The built-in modules reside in the Cmake 'share'
+directory, eg /usr/share/cmake/modules on Unix systems.
+
+Note libraries support by pkg-config can be handled directly, with no need
+to create a custom FindABC helper.
+
+Adding a new executable target
+
+    add_executable(myexecutable ${SOURCES} ${HEADERS})
+    target_link_libraries(myexecutable .... libraries ... )
+    install(TARGETS myexecutable RUNTIME DESTINATION bin)
+
+(If the executable should not be installed, omit the final line above)
+
+If you add an additional line
+
+    add_test(testname ${EXECUTABLE_OUTPUT_PATH}/myexecutable)
+
+Then running 'make test' will run your executable as a unit test. The
+executable should return either a success or failure result code.
+

README.plib

@@ -1,16 +0,0 @@
-[This file is mirrored in both the FlightGear and SimGear packages.]
-
-You *must* have plib version 1.6.0 or later installed on your system
-to build FlightGear!"  Flight Gear is no longer compatible with the
-earlier versions of the library.
-
-You can get the latest version of plib from:
-
-    http://plib.sourceforge.net
-
-Build notes:
-
-You should be able to just run "./configure" to configure the package
-and use all of plib's defaults.  Then run "make" followed by "make
-install".  By default, plib installs itself into /usr so if you don't
-like this, be sure to specify an alternate prefix such as --prefix=/usr/local

SimGear.dsw

@@ -1,29 +0,0 @@
-Microsoft Developer Studio Workspace File, Format Version 6.00
-# WARNING: DO NOT EDIT OR DELETE THIS WORKSPACE FILE!
-
-###############################################################################
-
-Project: "SimGear"=".\SimGear.dsp" - Package Owner=<4>
-
-Package=<5>
-{{{
-}}}
-
-Package=<4>
-{{{
-}}}
-
-###############################################################################
-
-Global:
-
-Package=<5>
-{{{
-}}}
-
-Package=<3>
-{{{
-}}}
-
-###############################################################################
-

TODO

@@ -1 +0,0 @@
-03/25/2001 - Resolve location of Sky dome implimentation documentation.

Thanks

@@ -47,6 +47,18 @@ Jean-Francois Doue
   http://www.animats.com/simpleppp/ftp/public_html/topics/developers.html
 
 
+Melchior Franz
+  METAR parser and fetcher. "material" animation (based on Jim Wilsons's
+  "emission" animation). Debugging and extension of property listener
+  features. Addition of removeChildren.
+
+
+Mathias Froehlich
+  Reworked and cleaned up large parts of the infrastructure, of math
+  files, animations and rendering in preparation of a transition to
+  the OSG library. Added new handlers for shared and referenced objects.
+
+
 Bruce Finney <bfinney@gte.net>
   MSVC5 compatibility.
 
@@ -71,6 +83,10 @@ Bruce Jackson of NASA <e.b.jackson@larc.nasa.gov>
   http://dcb.larc.nasa.gov/www/DCBStaff/ebj/ebj.html
 
 
+Maik Justus
+  Fixed an old bug in the SGPropertyNode class.
+
+
 Richard Kaszeta <bofh@me.umn.edu>
   Contributed screen buffer to ppm screen shot routine.
   Rich has also helped in the early development of the Flight Gear "altitude 
@@ -90,6 +106,11 @@ David Megginson <david@megginson.com>
   SimGear property manager/registry
 
 
+Tim Moore
+  Ported the (chrome) "shader" animation to OSG, and helped with porting
+  the "material" animation.
+
+
 Curt Olson http://www.flightgear.org/~curt/
   Curt is responsible for overall project and source code management.
   He has his hands in many of the areas.
@@ -99,7 +120,7 @@ Petter Reinholdtsen <pere@games.no>
   Incorporated the Gnu automake/autoconf system (with libtool).
   This should streamline and standardize the build process for all
   Unix-like platforms.  It should have little effect on IDE type 
-  environments since the don't use the Unix make system.
+  environments since these don't use the Unix make system.
 
 
 Paul Schlyter <pausch@saaf.se>  

acinclude.m4

@@ -1,415 +0,0 @@
-dnl
-dnl originally from ncftp 2.3.0
-dnl added wi_EXTRA_PDIR and wi_ANSI_C
-dnl $Id$
-dnl
-AC_DEFUN([wi_EXTRA_IDIR], [
-incdir="$1"
-if test -r $incdir ; then
-	case "$CPPFLAGS" in
-		*-I${incdir}*)
-			# echo "   + already had $incdir" 1>&6
-			;;
-		*)
-			if test "$CPPFLAGS" = "" ; then
-				CPPFLAGS="-I$incdir"
-			else
-				CPPFLAGS="$CPPFLAGS -I$incdir"
-			fi
-			echo "   + found $incdir" 1>&6
-			;;
-	esac
-fi
-])
-dnl
-dnl
-dnl
-dnl
-AC_DEFUN([wi_EXTRA_LDIR], [
-mylibdir="$1"
-if test -r $mylibdir ; then
-	case "$LDFLAGS" in
-		*-L${mylibdir}*)
-			# echo "   + already had $mylibdir" 1>&6
-			;;
-		*)
-			if test "$LDFLAGS" = "" ; then
-				LDFLAGS="-L$mylibdir"
-			else
-				LDFLAGS="$LDFLAGS -L$mylibdir"
-			fi
-			echo "   + found $mylibdir" 1>&6
-			;;
-	esac
-fi
-])
-dnl
-dnl __FP__
-dnl
-dnl
-AC_DEFUN([wi_EXTRA_PDIR], [
-progdir="$1"
-if test -r $progdir ; then
-	case "$PATH" in
-		*:${progdir}*)
-			# echo "   + already had $progdir" 1>&6
-			;;
-		*${progdir}:*)
-			# echo "   + already had $progdir" 1>&6
-			;;
-		*)
-			if test "$PATH" = "" ; then
-				PATH="$progdir"
-			else
-				PATH="$PATH:$progdir"
-			fi
-			echo "   + found $progdir" 1>&6
-			;;
-	esac
-fi
-])
-dnl
-dnl
-dnl If you want to also look for include and lib subdirectories in the
-dnl $HOME tree, you supply "yes" as the first argument to this macro.
-dnl
-dnl If you want to look for subdirectories in include/lib directories,
-dnl you pass the names in argument 3, otherwise pass a dash.
-dnl
-AC_DEFUN([wi_EXTRA_DIRS], [echo "checking for extra include and lib directories..." 1>&6
-ifelse([$1], yes, [dnl
-b1=`cd .. ; pwd`
-b2=`cd ../.. ; pwd`
-exdirs="$HOME $j $b1 $b2 $prefix $2"
-],[dnl
-exdirs="$prefix $2"
-])
-subexdirs="$3"
-if test "$subexdirs" = "" ; then
-	subexdirs="-"
-fi
-for subexdir in $subexdirs ; do
-if test "$subexdir" = "-" ; then
-	subexdir=""
-else
-	subexdir="/$subexdir"
-fi
-for exdir in $exdirs ; do
-	if test "$exdir" != "/usr" || test "$subexdir" != ""; then
-		incdir="${exdir}/include${subexdir}"
-		wi_EXTRA_IDIR($incdir)
-
-		mylibdir="${exdir}/lib${subexdir}"
-		wi_EXTRA_LDIR($mylibdir)
-
-		progdir="${exdir}/bin${subexdir}"
-		wi_EXTRA_PDIR($progdir)
-	fi
-done
-done
-])
-dnl
-dnl
-dnl
-AC_DEFUN([wi_HPUX_CFLAGS],
-[AC_MSG_CHECKING(if HP-UX ansi C compiler flags are needed)
-AC_REQUIRE([AC_PROG_CC])
-os=`uname -s | tr '[A-Z]' '[a-z]'`
-ac_cv_hpux_flags=no
-if test "$os" = hp-ux ; then
-	if test "$ac_cv_prog_gcc" = yes ; then
-		if test "$CFLAGS" != "" ; then
-			# Shouldn't be in there.
-			CFLAGS=`echo "$CFLAGS" | sed 's/-Aa//g'`
-		fi
-	else
-		# If you're not using gcc, then you better have a cc/c89
-		# that is usable.  If you have the barebones compiler, it
-		# won't work.  The good compiler uses -Aa for the ANSI
-		# compatible stuff.
-		x=`echo $CFLAGS | grep 'Aa' 2>/dev/null`
-		if test "$x" = "" ; then
-			CFLAGS="$CFLAGS -Aa"
-		fi
-		ac_cv_hpux_flags=yes
-	fi
-	# Also add _HPUX_SOURCE to get the extended namespace.
-	x=`echo $CFLAGS | grep '_HPUX_SOURCE' 2>/dev/null`
-	if test "$x" = "" ; then
-		CFLAGS="$CFLAGS -D_HPUX_SOURCE"
-	fi
-fi
-AC_MSG_RESULT($ac_cv_hpux_flags)
-])
-dnl
-dnl
-dnl
-AC_DEFUN([wi_CFLAGS], [AC_REQUIRE([AC_PROG_CC])
-wi_HPUX_CFLAGS
-	if test "$CFLAGS" = "" ; then
-		CFLAGS="-O"
-	elif test "$ac_cv_prog_gcc" = "yes" ; then
-		case "$CFLAGS" in
-			*"-g -O"*)
-				#echo "using -g as default gcc CFLAGS" 1>&6
-				CFLAGS=`echo $CFLAGS | sed 's/-g\ -O/-O/'`
-				;;
-			*"-O -g"*)
-				# Leave the -g, but remove all -O options.
-				#echo "using -g as default gcc CFLAGS" 1>&6
-				CFLAGS=`echo $CFLAGS | sed 's/-O\ -g/-O/'`
-				;;
-		esac
-	fi
-])
-dnl
-dnl
-dnl
-AC_DEFUN([wi_PROTOTYPES], [
-AC_MSG_CHECKING(if the compiler supports function prototypes)
-AC_TRY_COMPILE(,[extern void exit(int status);],[wi_cv_prototypes=yes
-AC_DEFINE(PROTOTYPES)],wi_cv_prototypes=no)
-AC_MSG_RESULT($wi_cv_prototypes)
-])
-dnl
-dnl
-dnl
-AC_DEFUN([wi_ANSI_C], [
-AC_MSG_CHECKING(ANSI-style function definitions)
-AC_TRY_COMPILE(,[int blubb(int x) { return 0; }],[wi_cv_ansi_funcs=yes
-AC_DEFINE(ANSI_FUNCS)],wi_cv_ansi_funcs=no)
-AC_MSG_RESULT($wi_cv_ansi_funcs)
-])
-dnl
-dnl
-dnl
-AC_DEFUN([wi_HEADER_SYS_SELECT_H], [
-# See if <sys/select.h> is includable after <sys/time.h>
-if test "$ac_cv_header_sys_time_h" = no ; then
-AC_CHECK_HEADERS(sys/time.h sys/select.h)
-else
-AC_CHECK_HEADERS(sys/select.h)
-fi
-if test "$ac_cv_header_sys_select_h" = yes ; then
-	AC_MSG_CHECKING([if <sys/select.h> is compatible with <sys/time.h>])
-	selecth=yes
-	if test "$ac_cv_header_sys_time_h" = yes ; then
-		AC_TRY_COMPILE([#include <sys/time.h>
-		#include <sys/select.h>],[
-		fd_set a;
-		struct timeval tmval;
-
-		tmval.tv_sec = 0;],selecth=yes,selecth=no)
-
-		if test "$selecth" = yes ; then
-			AC_DEFINE(CAN_USE_SYS_SELECT_H)
-		fi
-	fi
-	AC_MSG_RESULT($selecth)
-fi
-])
-dnl
-dnl
-dnl
-AC_DEFUN([wi_LIB_RESOLV], [
-# See if we could access two well-known sites without help of any special
-# libraries, like resolv.
-
-AC_TRY_RUN([
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#include <netdb.h>
- 
-main()
-{
-	struct hostent *hp1, *hp2;
-	int result;
-
-	hp1 = gethostbyname("gatekeeper.dec.com");
-	hp2 = gethostbyname("ftp.ncsa.uiuc.edu");
-	result = ((hp1 != (struct hostent *) 0) && (hp2 != (struct hostent *) 0));
-	exit(! result);
-}],look_for_resolv=no,look_for_resolv=yes,look_for_resolv=yes)
-
-AC_MSG_CHECKING([if we need to look for -lresolv])
-AC_MSG_RESULT($look_for_resolv)
-if test "$look_for_resolv" = yes ; then
-AC_CHECK_LIB(resolv,main)
-else
-	ac_cv_lib_resolv=no
-fi
-])
-dnl
-dnl
-dnl
-
-AC_DEFUN([wi_LIB_NSL], [
-AC_MSG_CHECKING(if we can use -lnsl)
-ac_save_LIBS="$LIBS";
-LIBS="$LIBS -lnsl";
-AC_CACHE_VAL(r_cv_use_libnsl, [
-AC_TRY_RUN(
-main() { if (getpwuid(getuid())) exit(0); exit(-1); },
-nc_cv_use_libnsl=yes, nc_cv_use_libnsl=no, nc_cv_use_libnsl=no)
-])
-if test "$nc_cv_use_libnsl" = "no"; then LIBS="$ac_save_LIBS"; fi
-AC_MSG_RESULT($nc_cv_use_libnsl)
-])dnl
-
-dnl
-dnl
-dnl
-
-AC_DEFUN([nc_PATH_PROG_ZCAT], [
-AC_PATH_PROG(GZCAT,gzcat)
-AC_PATH_PROG(ZCAT,zcat)
-if test "x$GZCAT" = x ; then
-	if test "x$ZCAT" != x ; then
-		# See if zcat is really gzcat.  gzcat has a --version option, regular
-		# zcat does not.
-		AC_MSG_CHECKING(if zcat is really gzcat in disguise)
-		if $ZCAT --version 2> /dev/null ; then
-			AC_DEFINE_UNQUOTED(GZCAT, "$ZCAT")
-			AC_MSG_RESULT(yes)
-		else
-			AC_MSG_RESULT(no)
-		fi
-	fi
-else
-	AC_DEFINE_UNQUOTED(GZCAT, "$GZCAT")
-fi
-
-if test "x$ZCAT" != x ; then
-	AC_DEFINE_UNQUOTED(ZCAT, "$ZCAT")
-fi
-])
-dnl
-dnl
-dnl
-AC_DEFUN([wi_SYSV_EXTRA_DIRS], [
-# Use System V because their curses extensions are required.  This must
-# be done early so we use the -I and -L in the library checks also.
-# This is mostly a Solaris/SunOS hack.  Note that doing this will also
-# use all of the other System V libraries and headers.
-
-AC_MSG_CHECKING(for alternative System V libraries)
-if test -f /usr/5include/curses.h ; then
-	CPPFLAGS="$CPPFLAGS -I/usr/5include"
-	LDFLAGS="$LDFLAGS -L/usr/5lib"
-	AC_MSG_RESULT(yes)
-else
-	AC_MSG_RESULT(no)
-fi
-])
-dnl
-dnl
-dnl
-AC_DEFUN([wi_DEFINE_UNAME], [
-# Get first 127 chars of all uname information.  Some folks have
-# way too much stuff there, so grab only the first 127.
-unam=`uname -a 2>/dev/null | cut -c1-127`
-if test "$unam" != "" ; then
-	AC_DEFINE_UNQUOTED(UNAME, "$unam")
-fi
-])
-dnl
-dnl
-dnl
-AC_DEFUN([wi_READLINE_WITH_NCURSES], [
-# Readline and Ncurses could both define "backspace".
-# Warn about this if we have both things in our definitions list.
-
-if test "$ac_cv_lib_readline" = yes && test "$ac_cv_lib_ncurses" = yes ; then
-
-AC_MSG_CHECKING(if readline and ncurses will link together)
-j="$LIBS"
-LIBS="-lreadline -lncurses"
-AC_TRY_LINK(,[
-readline("prompt");
-endwin();
-],k=yes,k=no)
-if test "$k" = no ; then
-	AC_MSG_RESULT(no)
-	# Remove '-lreadline' from LIBS.
-	LIBS=`echo $j | sed s/-lreadline//g`
-	ac_cv_lib_readline=no
-	AC_WARN([The versions of GNU readline and ncurses you have installed on this system
-can't be used together, because they use the same symbol, backspace. If
-possible, recompile one of the libraries with -Dbackspace=back_space, then
-re-run configure.])
-
-else
-	AC_MSG_RESULT(yes)
-	LIBS="$j"
-fi
-
-fi
-])
-dnl
-dnl
-dnl
-
-dnl AC_EXT_DAYLIGHT
-dnl Check for an external variable daylight. Stolen from w3c-libwww.
-AC_DEFUN([AC_EXT_DAYLIGHT],
-[ AC_MSG_CHECKING(int daylight variable)
-AC_TRY_COMPILE([#include <time.h>], [return daylight;],
-  have_daylight=yes,
-  have_daylight=no)
-AC_MSG_RESULT($have_daylight)
-])dnl
-
-dnl AC_EXT_TIMEZONE
-dnl Check for an external variable timezone. Stolen from tcl-8.0.
-AC_DEFUN([AC_EXT_TIMEZONE],
-[
-#
-# Its important to include time.h in this check, as some systems (like convex)
-# have timezone functions, etc.
-#
-have_timezone=no
-AC_MSG_CHECKING([long timezone variable])
-AC_TRY_COMPILE([#include <time.h>],
-        [extern long timezone;
-         timezone += 1;
-         exit (0);],
-        [have_timezone=yes
-         AC_MSG_RESULT(yes)],
-         AC_MSG_RESULT(no))
-
-#
-# On some systems (eg IRIX 6.2), timezone is a time_t and not a long.
-#
-if test "$have_timezone" = no; then
-   AC_MSG_CHECKING([time_t timezone variable])
-   AC_TRY_COMPILE([#include <time.h>],
-        [extern time_t timezone;
-         timezone += 1;
-         exit (0);],
-        [have_timezone=yes
-         AC_MSG_RESULT(yes)],
-         AC_MSG_RESULT(no))
-fi
-])dnl
-
-## AC_BZ_SET_COMPILER: Addition by Theodore Papadopoulo
-## Patch by Jim McKelvey: change sed -e 's/ /@/g' to sed -e 's/ /@/'
-AC_DEFUN([AC_SG_SET_COMPILER],
-  [cxxwith=`echo $1 | sed -e 's/ /@/'`
-   case "$cxxwith" in
-     *:*@*)                 # Full initialization syntax
-       CXX=`echo "$cxxwith" | sed  -n -e 's/.*:\(.*\)@.*/\1/p'`
-       CXXFLAGS=`echo "$cxxwith" | sed  -n -e 's/.*:.*@\(.*\)/\1/p'`
-     ;;
-     *:*)                   # Simple initialization syntax
-       CXX=`echo "$cxxwith" | sed  -n -e 's/.*:\(.*\)/\1/p'`
-       CXXFLAGS=$3
-     ;;
-     *)                     # Default values
-       CXX=$2
-       CXXFLAGS=$3
-       CC="$2 --c"
-##       CFLAGS=
-     ;;
-   esac])

am2dsp.cfg

@@ -1,38 +0,0 @@
-type = StaticLibrary,Multithreaded,
-exclude_dir = threads
-
-include_path = .
-include_path = ..
-include_path = .\SimGear
-include_path = ..\zlib-1.2.3
-include_path = "..\OpenAL 1.0 Software Development Kit\include"
-
-define = _USE_MATH_DEFINES
-define = _CRT_SECURE_NO_DEPRECATE
-define = HAVE_CONFIG_H
-
-# Rule to create simgear_config.h
-add_source_file = SOURCE=.\simgear\simgear_config.h.vc5\
-\
-!IF  "$(CFG)" == "SimGear - Win32 Release"\
-\
-# Begin Custom Build - Creating config.h\
-InputPath=.\simgear\simgear_config.h.vc5\
-\
-".\simgear\simgear_config.h" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"\
-        copy .\simgear\simgear_config.h.vc5 .\simgear\simgear_config.h\
-\
-# End Custom Build\
-\
-!ELSEIF  "$(CFG)" == "SimGear - Win32 Debug"\
-\
-# Begin Custom Build - Creating config.h\
-InputPath=.\simgear\simgear_config.h.vc5\
-\
-".\simgear\simgear_config.h" : $(SOURCE) "$(INTDIR)" "$(OUTDIR)"\
-        copy .\simgear\simgear_config.h.vc5 .\simgear\simgear_config.h\
-\
-# End Custom Build\
-\
-!ENDIF\
-

autogen.sh

@@ -1,52 +0,0 @@
-#!/bin/sh
-
-OSTYPE=`uname -s`
-MACHINE=`uname -m`
-AUTO_MAKE_VERSION=`automake --version | head -1 | awk '{print $4}' | sed -e 's/\.\([0-9]*\).*/\1/'`
-if test $AUTO_MAKE_VERSION -lt 15; then
-    echo ""
-    echo "You need to upgrade to automake version 1.5 or greater."
-    echo "Most distributions have packages available to install or you can"
-    echo "find the source for the most recent version at"
-    echo "ftp://ftp.gnu.org/gnu/automake"
-    exit 1
-fi
-
-echo "Host info: $OSTYPE $MACHINE"
-echo -n " automake: `automake --version | head -1 | awk '{print $4}'`"
-echo " ($AUTO_MAKE_VERSION)"
-echo ""
-
-echo "Running aclocal"
-aclocal
-
-echo "Running autoheader"
-autoheader
-if [ ! -e simgear/simgear_config.h.in ]; then
-    echo "ERROR: autoheader didn't create simgear/simgear_config.h.in!"
-    exit 1
-fi    
-
-echo "Running automake --add-missing"
-automake --add-missing
-
-echo "Running autoconf"
-autoconf
-
-if [ ! -e configure ]; then
-    echo "ERROR: configure was not created!"
-    exit 1
-fi
-
-echo ""
-echo "======================================"
-
-if [ -f config.cache ]; then
-    echo "config.cache exists.  Removing the config.cache file will force"
-    echo "the ./configure script to rerun all it's tests rather than using"
-    echo "the previously cached values."
-    echo ""
-fi
-
-echo "Now you are ready to run './configure'"
-echo "======================================"

configure.ac

@@ -1,470 +0,0 @@
-dnl Process this file with autoget.sh to produce a working configure
-dnl script.
-
-AC_INIT
-AC_CONFIG_SRCDIR([simgear/bucket/newbucket.cxx])
-
-dnl Require at least automake 2.52
-AC_PREREQ(2.52)
-
-dnl Initialize the automake stuff
-AM_INIT_AUTOMAKE(SimGear, 0.3.10)
-
-dnl Specify KAI C++ compiler and flags.
-dnl Borrowed with slight modification from blitz distribution.
-AC_ARG_WITH(cxx,
-  [  --with-cxx=COMPILER[:name-flags] set options for COMPILER (KCC)],
-  [case "$withval" in
-    KCC*)    # KAI C++ http://www.kai.com/
-      echo "Configuring for KAI C++"
-      AC_SG_SET_COMPILER($withval,"KCC","--restrict --strict_warnings")
-      CXX_OPTIMIZE_FLAGS=="+K3 -O3"
-      CXX_DEBUG_FLAGS="-g +K0"
-    ;;
-  esac
-])
-
-echo CXX = $CXX
-echo CC = $CC
-
-dnl Checks for programs.
-AC_PROG_MAKE_SET
-AC_PROG_CC
-AC_PROG_CPP
-AC_PROG_CXX
-AC_PROG_RANLIB
-AC_PROG_INSTALL
-AC_PROG_LN_S
-
-dnl set the $host variable based on local machine/os
-AC_CANONICAL_HOST
-
-dnl Used on the Irix platform
-case "${host}" in
-*-*-irix*)
-    if test "x$CXX" = "xCC" -o "x$CXX" = "xccache CC"; then
-        AR="$CXX -ar"
-        ARFLAGS="-o"
-        CXXFLAGS="$CXXFLAGS -I$(top_srcdir)/simgear/compatibility/MIPSpro740"
-        compatibility_DIR="compatibility"
-        MIPSpro_DIRS="MIPSpro740"
-        AC_MSG_CHECKING([for MIPSpro compiler version 7.4 or newer])
-        AC_TRY_RUN([
-           int main() {
-              if ( _COMPILER_VERSION < 740 ) {
-                 return -1;
-              }
-              return 0;
-           }
-
-        ], AC_MSG_RESULT(yes),
-        [  AC_MSG_RESULT(no)
-           CXXFLAGS="$CXXFLAGS -I$(top_srcdir)/simgear/compatibility/MIPSpro721"
-           MIPSpro_DIRS="$(MIPSpro_DIRS) MIPSpro721"
-           AC_MSG_WARN([Using our own subset of the STL headers])
-        ], AC_MSG_RESULT(yes))
-        AC_SUBST(MIPSpro_DIRS)
-    fi
-    ;;
-*)
-    AR="ar"
-    ARFLAGS="cru"
-    compatibility_DIR=
-    ;;
-esac
-AC_SUBST(AR)
-AC_SUBST(ARFLAGS)
-AC_SUBST(compatibility_DIR)
-
-if echo $includedir | egrep "simgear$" > /dev/null; then
-    echo "includedir is" $includedir "libdir is" $libdir
-else
-    includedir="${includedir}/simgear"
-    echo "includedir changed to" $includedir "libdir is" $libdir
-fi
-         
-dnl set logging; default value of with_logging=yes
-AC_ARG_WITH(logging, [  --with-logging          Include logging output (default)])
-if test "x$with_logging" = "xno" ; then
-    AC_DEFINE([FG_NDEBUG], 1, [Define for no logging output])
-fi
-
-# Specify if we want to build with Norman's jpeg image server support.
-# This requires libjpeg to be installed and available.
-# Default to with_jpeg_server=no
-JPEGLIB=''
-AC_ARG_WITH(jpeg_factory, [  --with-jpeg-factory     Include Norman's jpeg image factory support code])
-if test "x$with_jpeg_factory" = "xyes" ; then
-    echo "Building with Norman's jpeg image factory support"
-    AC_CHECK_LIB(jpeg, jpeg_start_compress)
-    if test "x$ac_cv_lib_jpeg_jpeg_start_compress" != "xyes" ; then
-        echo
-        echo "In order to build the jpeg factory code you need libjpeg installed."
-        echo "otherwise please configure with the --with-jpeg-sever=no option"
-        echo
-        echo "libjpeg is available at :"
-        echo "  ftp://ftp.uu.net in the directory graphics/jpeg"
-        exit 1
-    fi
-else
-    echo "Building without Norman's jpeg image server support"
-fi
-AM_CONDITIONAL(ENABLE_JPEG_SERVER, test "x$with_jpeg_factory" = "xyes")
-
-# specify the plib location
-AC_ARG_WITH(plib, [  --with-plib=PREFIX      Specify the prefix path to plib])
-
-if test "x$with_plib" != "x" ; then
-    echo "plib prefix is $with_plib"
-    EXTRA_DIRS="${EXTRA_DIRS} $with_plib"
-fi
-
-dnl Determine an extra directories to add to include/lib search paths
-case "${host}" in
-*-apple-darwin* | *-*-cygwin* | *-*-mingw32*)
-    echo no EXTRA_DIRS for $host
-    ;;
-
-*)
-    if test -d /usr/X11R6 ; then
-        EXTRA_DIR1="/usr/X11R6"
-    fi
-    if test -d /opt/X11R6 ; then
-        EXTRA_DIR2="/opt/X11R6"
-    fi
-    EXTRA_DIRS="${EXTRA_DIRS} $EXTRA_DIR1 $EXTRA_DIR2"
-    ;;
-
-esac
-wi_EXTRA_DIRS(no, ${EXTRA_DIRS})
-
-
-dnl Using AM_CONDITIONAL is a step out of the protected little 
-dnl automake fold so it is potentially dangerous.  But, we are
-dnl beginning to run into cases where the standard checks are not
-dnl enough.  AM_CONDITIONALS are then referenced to conditionally
-dnl build a Makefile.in from a Makefile.am which lets us define custom
-dnl includes, compile alternative source files, etc.
-
-dnl X11 might be installed on Mac OS X or cygwin/mingwin, we don't want
-dnl to use it if it is.
-case "${host}" in
-*-apple-darwin* | *-*-cygwin* | *-*-mingw32*)
-    echo no fancy X11 check
-    ;;
-
-*)
-    AC_PATH_XTRA
-    ;;
-
-esac
-
-dnl Checks for libraries.
-
-dnl Thread related checks
-AC_CHECK_HEADER(pthread.h)
-AC_SEARCH_LIBS(pthread_exit, [pthread c_r])
-if test "x$ac_cv_header_pthread_h" = "xyes"; then
-    CXXFLAGS="$CXXFLAGS -D_REENTRANT"
-    CFLAGS="$CFLAGS -D_REENTRANT"
-
-  if test "x$ac_cv_search_pthread_exit" = "x-lc_r"; then
-    CXXFLAGS="-pthread $CXXFLAGS"
-    CFLAGS="-pthread $CFLAGS"
-  fi
-fi
-
-AM_CONDITIONAL(HAVE_THREADS, test "x$ac_cv_header_pthread_h" = "xyes")
-
-thread_LIBS="$LIBS"
-LIBS=""
-
-dnl search for network related libraries
-AC_SEARCH_LIBS(inet_addr, xnet)
-AC_SEARCH_LIBS(socket, socket)
-
-network_LIBS="$LIBS"
-LIBS=""
-
-dnl check for some default libraries
-AC_SEARCH_LIBS(cos, m)
-
-base_LIBS="$LIBS"
-
-dnl check for OpenGL related libraries
-case "${host}" in
-*-*-cygwin* | *-*-mingw32*)
-    dnl CygWin under Windoze.
-
-    echo Win32 specific hacks...
-    AC_DEFINE([WIN32], 1, [Define for Win32 platforms])
-    AC_DEFINE([NOMINMAX], 1, [Define for Win32 platforms])
-
-    LIBS="$LIBS -lglu32 -lopengl32"
-    LIBS="$LIBS -luser32 -lgdi32 -lwinmm"
-
-    dnl add -lwsock32 for mingwin
-    case "${host}" in
-    *-*-mingw32*)
-        base_LIBS="$base_LIBS -lws2_32"
-        ;;
-    esac
-
-    echo "Will link apps with $LIBS"
-    ;;
-
-*-apple-darwin*)
-    dnl Mac OS X
-
-    LIBS="$LIBS -framework OpenGL -framework Carbon -lobjc"
-    ;;
-
-*)
-    dnl X-Windows based machines
-
-    AC_SEARCH_LIBS(XCreateWindow, X11)
-    AC_SEARCH_LIBS(XShmCreateImage, Xext)
-    AC_SEARCH_LIBS(XGetExtensionVersion, Xi)
-    AC_SEARCH_LIBS(IceOpenConnection, ICE)
-    AC_SEARCH_LIBS(SmcOpenConnection, SM)
-    AC_SEARCH_LIBS(XtMalloc, Xt)
-    AC_SEARCH_LIBS(XmuLookupStandardColormap, Xmu)
-    
-    AC_SEARCH_LIBS(glNewList, [ GL GLcore MesaGL ])
-    if test "x$ac_cv_search_glNewList" = "x-lGLcore"; then
-	dnl if GLcore found, then also check for GL
-        AC_SEARCH_LIBS(glXCreateContext, GL)
-    fi
-
-    dnl if using mesa, check for xmesa.h
-    if test "x$ac_cv_search_glNewList" = "x-lMesaGL"; then
-	AC_CHECK_HEADER(GL/fxmesa.h)
-	if test "x$ac_cv_header_GL_fxmesa_h" = "xyes"; then
-	    AC_DEFINE([XMESA], 1, [Define for fxmesa])
-            AC_DEFINE([FX], 1, [Define for fxmesa])
-        fi
-    fi
-
-    AC_SEARCH_LIBS(gluLookAt, [ GLU MesaGLU ])
-    ;;
-
-esac
-
-AC_SEARCH_LIBS(glutGetModifiers, [ glut glut32 freeglut ], have_glut=yes, have_glut=no)
-AM_CONDITIONAL(HAVE_GLUT, test "x$have_glut" = "xyes")
-
-opengl_LIBS="$LIBS"
-LIBS="$base_LIBS"
-
-dnl check for OpenAL libraries
-OPENAL_OK="no"
-case "${host}" in
-*-*-cygwin* | *-*-mingw32*)
-    dnl CygWin under Windoze.
-    INCLUDES="$INCLUDES -I/usr/local/include"
-    LIBS="$LIBS -L/usr/local/lib"
-    AC_SEARCH_LIBS(alGenBuffers, openal32)
-    AC_SEARCH_LIBS(alutInit, [ openal32 ALut ] )
-    LIBS="$LIBS -lwinmm -ldsound -ldxguid -lole32"
-    openal_LIBS="$LIBS"
-    OPENAL_OK="$ac_cv_search_alGenBuffers"
-    ;;
-
-*-apple-darwin*)
-    dnl Mac OS X
-
-    LIBS="$LIBS -framework IOKit -framework OpenAL"
-    openal_LIBS="$LIBS"
-    # not sure how to test if OpenAL exists on MacOS (does it come by default?)
-    OPENAL_OK="yes"
-    ;;
-
-*)
-    dnl default unix style machines
-
-    save_LIBS=$LIBS
-    LIBS="$LIBS $thread_LIBS"
-    AC_SEARCH_LIBS(alGenBuffers, openal)
-    AC_SEARCH_LIBS(alutInit, [ alut openal ] )
-    OPENAL_OK="$ac_cv_search_alGenBuffers"
-    openal_LIBS="$LIBS"
-    LIBS=$save_LIBS
-    ;;
-
-esac
-
-if test "$OPENAL_OK" == "no"; then
-    echo
-    echo "You *must* have the openal library installed on your system to build"
-    echo "SimGear!"
-    echo
-    echo "Please see README.OpenAL for more details."
-    echo
-    echo "configure aborted."
-    exit
-fi
-
-LIBS="$base_LIBS"
-
-AC_SUBST(base_LIBS)
-AC_SUBST(openal_LIBS)
-AC_SUBST(opengl_LIBS)
-AC_SUBST(thread_LIBS)
-AC_SUBST(network_LIBS)
-
-dnl Check for MS Windows environment
-AC_CHECK_HEADER(windows.h)
-AM_CONDITIONAL(EXTGL_NEEDED, test "x$ac_cv_header_windows_h" = "xyes")
-
-# The following are C++ items that need to be tested for with the c++
-# compiler
-
-AC_LANG_PUSH(C++)
-
-dnl Check for "plib" without which we cannot go on
-AC_CHECK_HEADER(plib/ul.h)
-if test "x$ac_cv_header_plib_ul_h" != "xyes"; then
-    echo
-    echo "You *must* have the plib library installed on your system to build"
-    echo "SimGear!"
-    echo
-    echo "Please see README.plib for more details."
-    echo
-    echo "configure aborted."
-    exit
-fi
-
-AC_MSG_CHECKING([for plib 1.8.4 or newer])
-AC_TRY_RUN([
-#include <plib/ul.h>
-
-#define MIN_PLIB_VERSION 184
-
-int main() {
-    int major, minor, micro;
-
-    if ( PLIB_VERSION < MIN_PLIB_VERSION ) {
-	 return -1;
-    }
-
-    return 0;
-}
-
-],
-  AC_MSG_RESULT(yes),
-  [AC_MSG_RESULT(wrong version);
-   AC_MSG_ERROR([Install plib 1.8.4 or later first...])],
-  AC_MSG_RESULT(yes)
-)
-
-LIBS="$saved_LIBS"
-
-AC_LANG_POP
-
-dnl Check for system installed zlib
-AC_CHECK_HEADER(zlib.h)
-if test "x$ac_cv_header_zlib_h" != "xyes"; then
-    echo
-    echo "zlib library not found."
-    echo
-    echo "If your OS does not provide an installable package for zlib"
-    echo "you will have to compile and install it first yourself.  A copy"
-    echo "of zlib-1.1.4.tar.gz is included with SimGear.  You will"
-    echo "have to untar this source code, and follow its included instructions"
-    echo "to compile and install on your system."
-    echo
-    echo "configure aborted."
-    echo
-fi
-
-dnl Checks for header files.
-AC_HEADER_STDC
-AC_CHECK_HEADERS( \
-	fcntl.h getopt.h malloc.h memory.h stdint.h stdlib.h sys/param.h \
-	sys/stat.h sys/time.h sys/timeb.h unistd.h values.h )
-
-if test "x$ac_cv_header_stdint_h" = "xyes"; then
-    AC_DEFINE([HAVE_STDINT_H], 1, [Define if stdint.h exists])
-fi
-
-dnl Checks for typedefs, structures, and compiler characteristics.
-AC_C_CONST
-AC_TYPE_SIZE_T
-AC_TYPE_MODE_T
-AC_HEADER_TIME
-AC_STRUCT_TM
-
-dnl Checks for library functions.
-old_LIBS=$LIBS
-LIBS="$base_LIBS $network_LIBS $opengl_LIBS"
-AC_TYPE_SIGNAL
-AC_FUNC_VPRINTF
-AC_CHECK_FUNCS( [ \
-        ftime gettimeofday timegm memcpy bcopy mktime strstr rand \
-	random drand48 setitimer getitimer signal GetLocalTime rint getrusage ] )
-LIBS=$old_LIBS
-
-AM_CONFIG_HEADER(simgear/simgear_config.h)
-
-AC_CONFIG_FILES([ \
-	Makefile \
-	SimGear.spec \
-	simgear/Makefile \
-	simgear/version.h \
-	simgear/compatibility/Makefile \
-	simgear/compatibility/MIPSpro721/Makefile \
-	simgear/compatibility/MIPSpro740/Makefile \
-	simgear/bucket/Makefile \
-	simgear/debug/Makefile \
-	simgear/ephemeris/Makefile \
-	simgear/io/Makefile \
-	simgear/magvar/Makefile \
-	simgear/math/Makefile \
-	simgear/environment/Makefile \
-	simgear/misc/Makefile \
-	simgear/nasal/Makefile \
-	simgear/props/Makefile \
-	simgear/route/Makefile \
-	simgear/scene/Makefile \
-	simgear/scene/material/Makefile \
-	simgear/scene/model/Makefile \
-	simgear/scene/sky/Makefile \
-	simgear/scene/tgdb/Makefile \
-	simgear/screen/Makefile \
-	simgear/serial/Makefile \
-	simgear/sound/Makefile \
-	simgear/structure/Makefile \
-	simgear/threads/Makefile \
-	simgear/timing/Makefile \
-	simgear/xml/Makefile \
-])
-AC_OUTPUT
-
-
-echo ""
-echo "Configure Summary"
-echo "================="
-
-echo "Prefix: $prefix"
-
-if test "x$with_logging" != "x"; then
-    echo "Debug messages: $with_logging"
-else
-    echo "Debug messages: yes"
-fi
-
-echo -n "Automake version: "
-automake --version | head -1
-
-if test "x$with_jpeg_factory" = "xyes"; then
-   echo "With JPEG Factory support"
-else
-   echo "Without JPEG Factory support"
-fi
-
-if test "x$ac_cv_header_pthread_h" = "xyes"; then
-   echo "Threads: pthread lib found."
-else
-   echo "Threads: no threads (pthread lib not found.)"
-fi
-

package/RedHat/README

@@ -0,0 +1,13 @@
+Building a SimGear RPM package for Red Hat
+
+Please see the "package/openSUSE" directory for an
+example how to build a SimGear RPM package with
+shared SimGear libraries.
+
+You may need to adapt the names (exact spelling) of some
+of the package dependencies in the openSUSE RPM spec,
+since these may slightly differ for Red Hat.
+
+(If you have a working and tested Red Hat RPM spec,
+you're welcome to contribute it to this project.)
+

package/openSUSE/README

@@ -0,0 +1,23 @@
+Building a SimGear RPM package for openSUSE
+
+(Last tested with openSUSE 11.4+12.1)
+
+This directory contains the files which, along with
+the source code tar files, can be used to build
+an RPM package targeted at an openSUSE Linux system.
+
+To build SimGear from source do the following:
+
+1. obtain simgear-2.8.0.tar.bz2 (adapt version if
+    necessary) and copy it into ~/rpmbuild/SOURCES
+
+2. look in the BuildRequires section of SimGear.spec
+   and check that all the packages referred to are
+   installed (note, some of these packages may be part
+   of openSUSE's "games" repository).
+
+3. run 'rpmbuild -ba simgear.spec' and find the RPM
+   build result in ~/rpmbuild/RPMS
+
+That's all!
+

package/openSUSE/SimGear.spec

@@ -0,0 +1,63 @@
+Summary:    Simulator Construction Gear
+Name:       SimGear
+Version:    2.8.0
+Release:    1
+License:    LGPL
+URL:        http://www.flightgear.org
+Group:      Amusements/Games/3D/Simulation
+Source:     http://mirrors.ibiblio.org/pub/mirrors/flightgear/ftp/Source/simgear-%{version}.tar.bz2
+BuildRoot:  %{_tmppath}/%{name}-%{version}-build
+
+BuildRequires: gcc, gcc-c++, cmake
+BuildRequires: libopenal1-soft, openal-soft
+BuildRequires: libOpenSceneGraph-devel >= 3.0
+BuildRequires: zlib, zlib-devel
+BuildRequires: libjpeg62, libjpeg62-devel
+BuildRequires: boost-devel >= 1.37
+BuildRequires: subversion-devel, libapr1-devel
+Requires:      OpenSceneGraph-plugins >= 3.0
+
+%description
+This package contains a tools and libraries useful for constructing
+simulation and visualization applications such as FlightGear or TerraGear.
+
+%package devel
+Group:         Development/Libraries/Other
+Summary:       Development header files for SimGear
+Requires:      SimGear = %{version}
+
+%description devel
+Development headers and libraries for building applications against SimGear.
+
+%prep
+%setup -T -q -n simgear-%{version} -b 0
+
+%build
+export CFLAGS="$RPM_OPT_FLAGS"
+export CXXFLAGS="$RPM_OPT_FLAGS"
+# build SHARED simgear libraries
+cmake -DCMAKE_INSTALL_PREFIX=%{_prefix} -DSIMGEAR_SHARED:BOOL=ON -DENABLE_TESTS:BOOL=OFF -DJPEG_FACTORY:BOOL=ON
+make %{?_smp_mflags}
+
+%install
+make DESTDIR=%{buildroot} install
+
+%post -p /sbin/ldconfig
+
+%postun -p /sbin/ldconfig
+
+%files
+%defattr (-, root, root, -)
+%doc AUTHORS COPYING ChangeLog NEWS README
+%{_libdir}/libSimGear*.so.*
+
+%files devel
+%defattr(-,root,root,-)
+%dir %{_includedir}/simgear
+%{_includedir}/simgear/*
+%{_libdir}/libSimGear*.so
+
+%changelog
+* Mon Jul 02 2012 thorstenb@flightgear.org
+- Initial version
+

projects/VC8/SimGear.sln

@@ -1,20 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 9.00
-# Visual C++ Express 2005
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "SimGear", "SimGear.vcproj", "{952B5B5B-7FC8-4AE9-A664-333322BEEEB0}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Win32 = Debug|Win32
-		Release|Win32 = Release|Win32
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{952B5B5B-7FC8-4AE9-A664-333322BEEEB0}.Debug|Win32.ActiveCfg = Debug|Win32
-		{952B5B5B-7FC8-4AE9-A664-333322BEEEB0}.Debug|Win32.Build.0 = Debug|Win32
-		{952B5B5B-7FC8-4AE9-A664-333322BEEEB0}.Release|Win32.ActiveCfg = Release|Win32
-		{952B5B5B-7FC8-4AE9-A664-333322BEEEB0}.Release|Win32.Build.0 = Release|Win32
-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-EndGlobal

simgear/.cvsignore

@@ -1,8 +0,0 @@
-Makefile
-Makefile.in
-simgear_config.h
-simgear_config.h.in
-stamp-h
-stamp-h.in
-stamp-h1
-version.h

simgear/.gitignore

@@ -0,0 +1,2 @@
+simgear_config.h
+version.h

simgear/CMakeLists.txt

@@ -0,0 +1,147 @@
+
+file(WRITE ${PROJECT_BINARY_DIR}/simgear/version.h "#define SIMGEAR_VERSION ${SIMGEAR_VERSION}")
+
+foreach( mylibfolder 
+        bucket
+        bvh
+        debug
+        ephemeris
+        io
+        magvar
+        math
+        misc
+        nasal
+        nasal/cppbind
+        props
+        serial
+        structure
+        threads
+        timing
+        xml
+    )
+
+    add_subdirectory(${mylibfolder})
+
+endforeach( mylibfolder )
+
+if(NOT SIMGEAR_HEADLESS)
+    add_subdirectory(canvas)
+    add_subdirectory(environment)
+    add_subdirectory(screen)
+    add_subdirectory(scene)
+    add_subdirectory(sound)
+endif(NOT SIMGEAR_HEADLESS)
+
+
+if(ENABLE_RTI)
+    add_subdirectory(hla)
+endif(ENABLE_RTI)
+
+
+set(HEADERS compiler.h constants.h sg_inlines.h ${PROJECT_BINARY_DIR}/simgear/version.h)
+install (FILES ${HEADERS}  DESTINATION include/simgear/)
+
+get_property(coreSources GLOBAL PROPERTY CORE_SOURCES)
+get_property(sceneSources GLOBAL PROPERTY SCENE_SOURCES)
+get_property(publicHeaders GLOBAL PROPERTY PUBLIC_HEADERS)
+
+if(LIBSVN_FOUND)
+	add_definitions(${APR_CFLAGS})
+	include_directories(${LIBSVN_INCLUDE_DIR})
+endif()
+
+if(SIMGEAR_SHARED)
+    message(STATUS "Library building mode: SHARED LIBRARIES")
+    add_library(SimGearCore SHARED ${coreSources})
+
+  # set_property(TARGET SimGearCore PROPERTY FRAMEWORK 1)
+  #  message(STATUS "public header: ${publicHeaders}")
+  #  set_property(TARGET SimGearCore PROPERTY PUBLIC_HEADER "${publicHeaders}")
+    set_property(TARGET SimGearCore PROPERTY LINKER_LANGUAGE CXX)
+
+    set_property(TARGET SimGearCore PROPERTY VERSION   ${SIMGEAR_VERSION})
+    set_property(TARGET SimGearCore PROPERTY SOVERSION ${SIMGEAR_SOVERSION})
+
+    target_link_libraries(SimGearCore ${ZLIB_LIBRARY} ${RT_LIBRARY} 
+        ${EXPAT_LIBRARIES}
+        ${CMAKE_THREAD_LIBS_INIT})
+
+    if(LIBSVN_FOUND)
+        target_link_libraries(SimGearCore ${LIBSVN_LIBRARIES})
+    endif(LIBSVN_FOUND)
+
+    if(NOT SIMGEAR_HEADLESS)
+        add_library(SimGearScene SHARED ${sceneSources})
+      # set_property(TARGET SimGearScene PROPERTY FRAMEWORK 1)
+      # set_property(TARGET SimGearScene PROPERTY PUBLIC_HEADER "${publicHeaders}")
+        set_property(TARGET SimGearScene PROPERTY LINKER_LANGUAGE CXX)
+        set_property(TARGET SimGearScene PROPERTY VERSION   ${SIMGEAR_VERSION})
+        set_property(TARGET SimGearScene PROPERTY SOVERSION ${SIMGEAR_SOVERSION})
+
+        target_link_libraries(SimGearScene
+            SimGearCore
+            ${ZLIB_LIBRARY}
+            ${OPENSCENEGRAPH_LIBRARIES}
+            ${OPENAL_LIBRARY}
+            ${OPENGL_LIBRARY}
+            ${JPEG_LIBRARY})
+    
+        install(TARGETS SimGearScene LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})
+    endif()
+    
+    install(TARGETS SimGearCore LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})
+else()
+    message(STATUS "Library building mode: STATIC LIBRARIES")
+
+	get_property(FG_GROUPS_CORE_SOURCES_C GLOBAL PROPERTY FG_GROUPS_CORE_SOURCES_C)
+	string(REPLACE "@" ";" groups ${FG_GROUPS_CORE_SOURCES_C} )
+	foreach(g ${groups})
+		string(REPLACE "#" ";" g2 ${g})
+		list(GET g2 0 name)
+		list(REMOVE_AT g2 0)
+		source_group("${name}\\Sources" FILES ${g2})
+	endforeach()
+
+	get_property(FG_GROUPS_CORE_SOURCES_H GLOBAL PROPERTY FG_GROUPS_CORE_SOURCES_H)
+	string(REPLACE "@" ";" groups ${FG_GROUPS_CORE_SOURCES_H} )
+	foreach(g ${groups})
+		string(REPLACE "#" ";" g2 ${g})
+		list(GET g2 0 name)
+		list(REMOVE_AT g2 0)
+		source_group("${name}\\Headers" FILES ${g2})
+	endforeach()
+
+    add_library(SimGearCore STATIC ${coreSources})
+    install(TARGETS SimGearCore ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+    
+    if(NOT SIMGEAR_HEADLESS)
+		get_property(FG_GROUPS_SCENE_SOURCES_C GLOBAL PROPERTY FG_GROUPS_SCENE_SOURCES_C)
+		string(REPLACE "@" ";" groups ${FG_GROUPS_SCENE_SOURCES_C} )
+		foreach(g ${groups})
+			string(REPLACE "#" ";" g2 ${g})
+			list(GET g2 0 name)
+			list(REMOVE_AT g2 0)
+			source_group("${name}\\Sources" FILES ${g2})
+		endforeach()
+
+		get_property(FG_GROUPS_SCENE_SOURCES_H GLOBAL PROPERTY FG_GROUPS_SCENE_SOURCES_H)
+		string(REPLACE "@" ";" groups ${FG_GROUPS_SCENE_SOURCES_H} )
+		foreach(g ${groups})
+			string(REPLACE "#" ";" g2 ${g})
+			list(GET g2 0 name)
+			list(REMOVE_AT g2 0)
+			source_group("${name}\\Headers" FILES ${g2})
+		endforeach()
+
+        add_library(SimGearScene STATIC ${sceneSources})
+        install(TARGETS SimGearScene ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+    endif(NOT SIMGEAR_HEADLESS)
+endif(SIMGEAR_SHARED)
+
+if(ENABLE_RTI)
+    # Ugly first aid to make hla compile agian
+    set_property(SOURCE hla/RTI13InteractionClass.cxx hla/RTI13ObjectClass.cxx
+        hla/RTI13ObjectInstance.cxx hla/RTI13Federate.cxx
+        hla/RTI13FederateFactory.cxx
+        APPEND PROPERTY COMPILE_FLAGS "-I${RTI_INCLUDE_DIR}")
+endif(ENABLE_RTI)

simgear/Makefile.am

@@ -1,37 +0,0 @@
-if HAVE_THREADS
-SGTHREAD_DIR = threads
-else
-SGTHREAD_DIR = 
-endif
-
-# METAR_DIRS =
-METAR_DIRS = environment
-
-EXTRA_DIST = simgear_config.h.vc5 version.h.in
-
-include_HEADERS = \
-	compiler.h constants.h sg_inlines.h sg_traits.hxx version.h
-
-SUBDIRS = \
-	$(compatibility_DIR) \
-	xml \
-	debug \
-	misc \
-	structure \
-	bucket \
-	ephemeris \
-	io \
-	magvar \
-	math \
-	$(METAR_DIRS) \
-	nasal \
-	props \
-	route \
-	scene \
-	screen \
-	serial \
-	sound \
-	$(SGTHREAD_DIR) \
-	timing
-
-DIST_SUBDIRS = $(SUBDIRS) compatibility threads

simgear/bucket/.cvsignore

@@ -1,3 +0,0 @@
-.deps
-Makefile
-Makefile.in

simgear/bucket/CMakeLists.txt

@@ -0,0 +1,7 @@
+
+include (SimGearComponent)
+
+set(HEADERS newbucket.hxx)
+set(SOURCES newbucket.cxx)
+
+simgear_component(bucket bucket "${SOURCES}" "${HEADERS}")

simgear/bucket/Makefile.am

@@ -1,17 +0,0 @@
-includedir = @includedir@/bucket
-
-lib_LIBRARIES = libsgbucket.a
-
-include_HEADERS = newbucket.hxx
-
-libsgbucket_a_SOURCES = newbucket.cxx
-
-# noinst_PROGRAMS = testbucket
-
-# testbucket_SOURCES = testbucket.cxx
-
-# testbucket_LDADD = \
-# 	$(top_builddir)/bucket/libsgbucket.a \
-# 	$(top_builddir)/misc/libsgmisc.a
-
-INCLUDES = -I$(top_srcdir)

simgear/bucket/newbucket.cxx

@@ -44,6 +44,9 @@ SGBucket::SGBucket(const double dlon, const double dlat) {
     set_bucket(dlon, dlat);
 }
 
+SGBucket::SGBucket(const SGGeod& geod) {
+    set_bucket(geod);
+}
 
 // create an impossible bucket if false
 SGBucket::SGBucket(const bool is_good) {
@@ -73,11 +76,6 @@ SGBucket::SGBucket(const long int bindex) {
 }
 
 
-// default destructor
-SGBucket::~SGBucket() {
-}
-
-
 // Set the bucket params for the specified lat and lon
 void SGBucket::set_bucket( double *lonlat ) {
     set_bucket( lonlat[0], lonlat[1] );
@@ -94,6 +92,11 @@ void SGBucket::set_bucket( double dlon, double dlat ) {
 
     // cout << "diff = " << diff << "  span = " << span << endl;
 
+    /* Calculate the greatest integral longitude less than
+     * or equal to the given longitude (floor(dlon)),
+     * but attribute coordinates near the east border
+     * to the next tile.
+     */
     if ( (dlon >= 0) || (fabs(diff) < SG_EPSILON) ) {
 	lon = (int)dlon;
     } else {
@@ -102,22 +105,48 @@ void SGBucket::set_bucket( double dlon, double dlat ) {
 
     // find subdivision or super lon if needed
     if ( span < SG_EPSILON ) {
+        /* sg_bucket_span() never returns 0.0
+         * or anything near it, so this really
+         * should not occur at any time.
+         */
 	// polar cap
 	lon = 0;
 	x = 0;
     } else if ( span <= 1.0 ) {
+        /* We have more than one tile per degree of
+         * longitude, so we need an x offset.
+         */
 	x = (int)((dlon - lon) / span);
     } else {
-	if ( (dlon >= 0) || (fabs(diff) < SG_EPSILON) ) {
-	    lon = (int)( (int)(lon / span) * span);
-	} else {
-	    // cout << " lon = " << lon 
-	    //  << "  tmp = " << (int)((lon-1) / span) << endl;
-	    lon = (int)( (int)((lon + 1) / span) * span - span);
-	    if ( lon < -180 ) {
-		lon = -180;
-	    }
-	}
+        /* We have one or more degrees per tile,
+         * so we need to find the base longitude
+         * of that tile.
+         *
+         * First we calculate the integral base longitude
+         * (e.g. -85.5 => -86) and then find the greatest
+         * multiple of span that is less than or equal to
+         * that longitude.
+         *
+         * That way, the Greenwich Meridian is always
+         * a tile border.
+         *
+         * This gets us into trouble with the polar caps,
+         * which have width 360 and thus either span
+         * the range from 0 to 360 or from -360 to 0
+         * degrees, depending on whether lon is positive
+         * or negative!
+         *
+         * We also get into trouble with the 8 degree tiles
+         * north of 88N and south of 88S, because the west-
+         * and east-most tiles in that range will cover 184W
+         * to 176W and 176E to 184E respectively, with their
+         * center at 180E/W!
+         */
+        lon=(int)floor(floor((lon+SG_EPSILON)/span)*span);
+        /* Correct the polar cap issue */
+        if ( lon < -180 ) {
+            lon = -180;
+        }
 	x = 0;
     }
 
@@ -126,17 +155,26 @@ void SGBucket::set_bucket( double dlon, double dlat ) {
     //
     diff = dlat - (double)(int)dlat;
 
+    /* Again, a modified floor() function (see longitude) */
     if ( (dlat >= 0) || (fabs(diff) < SG_EPSILON) ) {
 	lat = (int)dlat;
     } else {
 	lat = (int)dlat - 1;
     }
+    /* Latitude base and offset are easier, as
+     * tiles always are 1/8 degree of latitude wide.
+     */
     y = (int)((dlat - lat) * 8);
 }
 
 
+void SGBucket::set_bucket(const SGGeod& geod)
+{
+    set_bucket(geod.getLongitudeDeg(), geod.getLatitudeDeg());
+}
+
 // Build the path name for this bucket
-string SGBucket::gen_base_path() const {
+std::string SGBucket::gen_base_path() const {
     // long int index;
     int top_lon, top_lat, main_lon, main_lat;
     char hem, pole;
@@ -186,6 +224,17 @@ string SGBucket::gen_base_path() const {
 
 // return width of the tile in degrees
 double SGBucket::get_width() const {
+    if (lon==-180 && (lat==-89 || lat==88) ) {
+        /* Normally the tile at 180W in 88N and 89S
+         * would cover 184W to 176W and the next
+         * on the east side starts at 176W.
+         * To correct, make this a special tile
+         * from 180W to 176W with 4 degrees width
+         * instead of the normal 8 degrees at
+         * that latitude.
+         */
+         return 4.0;
+    }
     return sg_bucket_span( get_center_lat() );
 }
 
@@ -210,7 +259,7 @@ double SGBucket::get_width_m() const {
     double local_perimeter = local_radius * SGD_2PI;
     double degree_width = local_perimeter / 360.0;
 
-    return sg_bucket_span( get_center_lat() ) * degree_width;
+    return get_width() * degree_width;
 }
 
 

simgear/bucket/newbucket.hxx

@@ -24,6 +24,11 @@
 
 /** \file newbucket.hxx
  * A class and associated utiltity functions to manage world scenery tiling.
+ *
+ * Tile borders are aligned along circles of latitude and longitude.
+ * All tiles are 1/8 degree of latitude high and their width in degrees
+ * longitude depends on their latitude, adjusted in such a way that
+ * all tiles cover about the same amount of area of the earth surface.
  */
 
 #ifndef _NEWBUCKET_HXX
@@ -31,30 +36,12 @@
 
 #include <simgear/compiler.h>
 #include <simgear/constants.h>
+#include <simgear/math/SGMath.hxx>
 
-#ifdef SG_HAVE_STD_INCLUDES
-#  include <cmath>
-#  include <cstdio> // sprintf()
-#else
-#  include <math.h>
-#  include <stdio.h> // sprintf()
-#endif
-
-#include STL_IOSTREAM
-
-// I don't understand ... <math.h> or <cmath> should be included
-// already depending on how you defined SG_HAVE_STD_INCLUDES, but I
-// can go ahead and add this -- CLO
-#ifdef __MWERKS__
-SG_USING_STD(sprintf);
-SG_USING_STD(fabs);
-#endif
-
-#include STL_STRING
-
-SG_USING_STD(string);
-SG_USING_STD(ostream);
-
+#include <cmath>
+#include <cstdio> // sprintf()
+#include <ostream>
+#include <string>
 
 /**
  * standard size of a bucket in degrees (1/8 of a degree)
@@ -113,7 +100,6 @@ static double sg_bucket_span( double l ) {
 class SGBucket {
 
 private:
-    double cx, cy;  // centerpoint (lon, lat) in degrees of bucket
     short lon;        // longitude index (-180 to 179)
     short lat;        // latitude index (-90 to 89)
     char x;          // x subdivision (0 to 7)
@@ -133,6 +119,13 @@ public:
      */
     SGBucket(const double dlon, const double dlat);
 
+    /**
+     * Construct a bucket given a specific location.
+     * @param dlon longitude specified in degrees
+     * @param dlat latitude specified in degrees
+     */
+    SGBucket(const SGGeod& geod);
+
     /** Construct a bucket.
      *  @param is_good if false, create an invalid bucket.  This is
      *  useful * if you are comparing cur_bucket to last_bucket and
@@ -146,11 +139,6 @@ public:
      */
     SGBucket(const long int bindex);
 
-    /**
-     * Default destructor.
-     */
-    ~SGBucket();
-
     /**
      * Reset a bucket to represent a new lat and lon
      * @param dlon longitude specified in degrees
@@ -165,6 +153,13 @@ public:
      */
     void set_bucket( double *lonlat );
 
+    /**
+     * Reset a bucket to represent a new lat and lon
+     * @param dlon longitude specified in degrees
+     * @param dlat latitude specified in degrees
+     */
+    void set_bucket(const SGGeod& geod);
+
     /**
      * Create an impossible bucket.
      * This is useful if you are comparing cur_bucket to last_bucket
@@ -200,18 +195,19 @@ public:
      * string form.
      * @return tile index in string form
      */
-    inline string gen_index_str() const {
+    inline std::string gen_index_str() const {
 	char tmp[20];
-	sprintf(tmp, "%ld", 
-                (((long)lon + 180) << 14) + ((lat + 90) << 6) + (y << 3) + x);
-	return (string)tmp;
+	std::sprintf(tmp, "%ld", 
+                     (((long)lon + 180) << 14) + ((lat + 90) << 6)
+                     + (y << 3) + x);
+	return (std::string)tmp;
     }
 
     /**
      * Build the base path name for this bucket.
      * @return base path in string form
      */
-    string gen_base_path() const;
+    std::string gen_base_path() const;
 
     /**
      * @return the center lon of a tile.
@@ -220,9 +216,9 @@ public:
 	double span = sg_bucket_span( lat + y / 8.0 + SG_HALF_BUCKET_SPAN );
 
 	if ( span >= 1.0 ) {
-	    return lon + span / 2.0;
+	    return lon + get_width() / 2.0;
 	} else {
-	    return lon + x * span + span / 2.0;
+	    return lon + x * span + get_width() / 2.0;
 	}
     }
 
@@ -252,7 +248,24 @@ public:
      * @return the height of the tile in meters.
      */
     double get_height_m() const;
- 
+
+    /**
+     * @return the center of the bucket in geodetic coordinates.
+     */
+    SGGeod get_center() const
+    { return SGGeod::fromDeg(get_center_lon(), get_center_lat()); }
+
+    /**
+     * @return the center of the bucket in geodetic coordinates.
+     */
+    SGGeod get_corner(unsigned num) const
+    {
+        double lonFac = ((num + 1) & 2) ? 0.5 : -0.5;
+        double latFac = ((num    ) & 2) ? 0.5 : -0.5;
+        return SGGeod::fromDeg(get_center_lon() + lonFac*get_width(),
+                               get_center_lat() + latFac*get_height());
+    }
+
     // Informational methods.
 
     /**
@@ -279,10 +292,15 @@ public:
 
     // friends
 
-    friend ostream& operator<< ( ostream&, const SGBucket& );
+    friend std::ostream& operator<< ( std::ostream&, const SGBucket& );
     friend bool operator== ( const SGBucket&, const SGBucket& );
 };
 
+inline bool operator!= (const SGBucket& lhs, const SGBucket& rhs)
+    {
+        return !(lhs == rhs);
+    }
+
 
 /**
  * \relates SGBucket
@@ -313,10 +331,10 @@ void sgBucketDiff( const SGBucket& b1, const SGBucket& b2, int *dx, int *dy );
  * @param out output stream
  * @param b bucket
  */
-inline ostream&
-operator<< ( ostream& out, const SGBucket& b )
+inline std::ostream&
+operator<< ( std::ostream& out, const SGBucket& b )
 {
-    return out << b.lon << ":" << b.x << ", " << b.lat << ":" << b.y;
+    return out << b.lon << ":" << (int)b.x << ", " << b.lat << ":" << (int)b.y;
 }
 
 

simgear/bvh/.gitignore

@@ -0,0 +1,2 @@
+bvhtest
+

simgear/bvh/BVHBoundingBoxVisitor.hxx

@@ -0,0 +1,83 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHBoundingBoxVisitor_hxx
+#define BVHBoundingBoxVisitor_hxx
+
+#include <simgear/math/SGGeometry.hxx>
+
+#include "BVHVisitor.hxx"
+#include "BVHNode.hxx"
+#include "BVHGroup.hxx"
+#include "BVHPageNode.hxx"
+#include "BVHTransform.hxx"
+#include "BVHMotionTransform.hxx"
+#include "BVHLineGeometry.hxx"
+
+#include "BVHStaticData.hxx"
+
+#include "BVHStaticNode.hxx"
+#include "BVHStaticTriangle.hxx"
+#include "BVHStaticBinary.hxx"
+#include "BVHStaticGeometry.hxx"
+
+namespace simgear {
+
+class BVHBoundingBoxVisitor : public BVHVisitor {
+public:
+    virtual ~BVHBoundingBoxVisitor() {}
+    
+    void clear()
+    { _box.clear(); }
+    
+    virtual void apply(BVHGroup& node)
+    { expandBy(node.getBoundingSphere()); }
+    virtual void apply(BVHPageNode& node)
+    { expandBy(node.getBoundingSphere()); }
+    virtual void apply(BVHTransform& node)
+    { expandBy(node.getBoundingSphere()); }
+    virtual void apply(BVHMotionTransform& node)
+    { expandBy(node.getBoundingSphere()); }
+    virtual void apply(BVHLineGeometry& node)
+    { expandBy(node.getBoundingSphere()); }
+    virtual void apply(BVHStaticGeometry& node)
+    { expandBy(node.getBoundingSphere()); }
+    
+    virtual void apply(const BVHStaticBinary& node, const BVHStaticData& data)
+    { expandBy(node.getBoundingBox()); }
+    virtual void apply(const BVHStaticTriangle& node, const BVHStaticData& data)
+    { expandBy(node.computeBoundingBox(data)); }
+    
+    const SGBoxf& getBox() const
+    { return _box; }
+    
+private:
+    void expandBy(const SGSphered& sphere)
+    {
+        SGVec3f v0(sphere.getCenter() - sphere.getRadius()*SGVec3d(1, 1, 1));
+        SGVec3f v1(sphere.getCenter() + sphere.getRadius()*SGVec3d(1, 1, 1));
+        _box.expandBy(SGBoxf(v0, v1));
+    }
+    void expandBy(const SGBoxf& box)
+    { _box.expandBy(box); }
+    
+    SGBoxf _box;
+};
+
+}
+
+#endif

simgear/bvh/BVHGroup.cxx

@@ -0,0 +1,92 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
+#include "BVHGroup.hxx"
+
+#include <algorithm>
+
+namespace simgear {
+
+BVHGroup::BVHGroup()
+{
+}
+
+BVHGroup::~BVHGroup()
+{
+    ChildList::iterator i;
+    for (i = _children.begin(); i != _children.end(); ++i) {
+        (*i)->removeParent(this);
+        *i = 0;
+    }
+}
+
+void
+BVHGroup::accept(BVHVisitor& visitor)
+{
+    visitor.apply(*this);
+}
+
+void
+BVHGroup::clear()
+{
+    _children.clear();
+    invalidateBound();
+}
+
+void
+BVHGroup::addChild(BVHNode* child)
+{
+    if (!child)
+        return;
+    ChildList::iterator i;
+    i = std::find(_children.begin(), _children.end(), child);
+    if (i != _children.end())
+        return;
+    invalidateBound();
+    child->addParent(this);
+    _children.push_back(child);
+}
+
+void
+BVHGroup::removeChild(BVHNode* child)
+{
+    if (!child)
+        return;
+    ChildList::iterator i;
+    i = std::find(_children.begin(), _children.end(), child);
+    if (i == _children.end())
+        return;
+    invalidateBound();
+    child->removeParent(this);
+    _children.erase(i);
+}
+
+SGSphered
+BVHGroup::computeBoundingSphere() const
+{
+    SGSphered sphere;
+    ChildList::const_iterator i;
+    for (i = _children.begin(); i != _children.end(); ++i)
+        sphere.expandBy((*i)->getBoundingSphere());
+    return sphere;
+}
+
+}

simgear/bvh/BVHGroup.hxx

@@ -0,0 +1,61 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHGroup_hxx
+#define BVHGroup_hxx
+
+#include <simgear/structure/SGSharedPtr.hxx>
+#include "BVHNode.hxx"
+#include "BVHVisitor.hxx"
+
+namespace simgear {
+
+class BVHGroup : public BVHNode {
+public:
+    BVHGroup();
+    virtual ~BVHGroup();
+    
+    virtual void accept(BVHVisitor& visitor);
+    
+    void traverse(BVHVisitor& visitor)
+    {
+        ChildList::const_iterator i;
+        for (i = _children.begin(); i != _children.end(); ++i)
+            (*i)->accept(visitor);
+    }
+    
+    void clear();
+    void addChild(BVHNode* child);
+    void removeChild(BVHNode* child);
+    
+    unsigned getNumChildren() const
+    { return _children.size(); }
+    const BVHNode* getChild(unsigned i) const
+    { if (_children.size() <= i) return 0; return _children[i]; }
+    BVHNode* getChild(unsigned i)
+    { if (_children.size() <= i) return 0; return _children[i]; }
+    
+    virtual SGSphered computeBoundingSphere() const;
+    
+private:
+    typedef std::vector<SGSharedPtr<BVHNode> > ChildList;
+    ChildList _children;
+};
+
+}
+
+#endif

simgear/bvh/BVHLineGeometry.cxx

@@ -0,0 +1,49 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#include "BVHLineGeometry.hxx"
+
+#include "BVHVisitor.hxx"
+
+namespace simgear {
+
+BVHLineGeometry::BVHLineGeometry(const SGLineSegmentf& lineSegment, Type type) :
+    _lineSegment(lineSegment),
+    _type(type)
+{
+}
+
+BVHLineGeometry::~BVHLineGeometry()
+{
+}
+
+void
+BVHLineGeometry::accept(BVHVisitor& visitor)
+{
+    visitor.apply(*this);
+}
+
+SGSphered
+BVHLineGeometry::computeBoundingSphere() const
+{
+    SGSphered sphere;
+    sphere.expandBy(SGVec3d(_lineSegment.getStart()));
+    sphere.expandBy(SGVec3d(_lineSegment.getEnd()));
+    return sphere;
+}
+
+}

simgear/bvh/BVHLineGeometry.hxx

@@ -0,0 +1,53 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHLineGeometry_hxx
+#define BVHLineGeometry_hxx
+
+#include <simgear/math/SGGeometry.hxx>
+#include "BVHNode.hxx"
+
+namespace simgear {
+
+class BVHLineGeometry : public BVHNode {
+public:
+    enum Type {
+        CarrierCatapult,
+        CarrierWire
+    };
+
+    BVHLineGeometry(const SGLineSegmentf& lineSegment, Type type);
+    virtual ~BVHLineGeometry();
+
+    virtual void accept(BVHVisitor& visitor);
+
+    const SGLineSegmentf& getLineSegment() const
+    { return _lineSegment; }
+
+    Type getType() const
+    { return _type; }
+
+    virtual SGSphered computeBoundingSphere() const;
+
+private:
+    SGLineSegmentf _lineSegment;
+    Type _type;
+};
+
+}
+
+#endif

simgear/bvh/BVHLineSegmentVisitor.cxx

@@ -0,0 +1,166 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
+#include "BVHLineSegmentVisitor.hxx"
+
+#include <simgear/math/SGGeometry.hxx>
+
+#include "BVHVisitor.hxx"
+
+#include "BVHNode.hxx"
+#include "BVHGroup.hxx"
+#include "BVHPageNode.hxx"
+#include "BVHTransform.hxx"
+#include "BVHMotionTransform.hxx"
+#include "BVHLineGeometry.hxx"
+#include "BVHStaticGeometry.hxx"
+
+#include "BVHStaticData.hxx"
+
+#include "BVHStaticNode.hxx"
+#include "BVHStaticTriangle.hxx"
+#include "BVHStaticBinary.hxx"
+
+namespace simgear {
+
+void
+BVHLineSegmentVisitor::apply(BVHGroup& group)
+{
+    if (!intersects(_lineSegment, group.getBoundingSphere()))
+        return;
+    group.traverse(*this);
+}
+
+void
+BVHLineSegmentVisitor::apply(BVHPageNode& pageNode)
+{
+    if (!intersects(_lineSegment, pageNode.getBoundingSphere()))
+        return;
+    pageNode.traverse(*this);
+}
+    
+void
+BVHLineSegmentVisitor::apply(BVHTransform& transform)
+{
+    if (!intersects(_lineSegment, transform.getBoundingSphere()))
+        return;
+    
+    bool haveHit = _haveHit;
+    _haveHit = false;
+    
+    // Push the line segment
+    SGLineSegmentd lineSegment = getLineSegment();
+    _lineSegment = transform.lineSegmentToLocal(lineSegment);
+    
+    transform.traverse(*this);
+    
+    if (_haveHit) {
+        _linearVelocity = transform.vecToWorld(_linearVelocity);
+        _angularVelocity = transform.vecToWorld(_angularVelocity);
+        SGVec3d point(transform.ptToWorld(_lineSegment.getEnd()));
+        _lineSegment.set(lineSegment.getStart(), point);
+        _normal = transform.vecToWorld(_normal);
+    } else {
+        _lineSegment = lineSegment;
+        _haveHit = haveHit;
+    }
+}
+
+void
+BVHLineSegmentVisitor::apply(BVHMotionTransform& transform)
+{
+    if (!intersects(_lineSegment, transform.getBoundingSphere()))
+        return;
+    
+    bool haveHit = _haveHit;
+    _haveHit = false;
+
+    // Push the line segment
+    SGLineSegmentd lineSegment = getLineSegment();
+    SGMatrixd toLocal = transform.getToLocalTransform(_time);
+    _lineSegment = lineSegment.transform(toLocal);
+    
+    transform.traverse(*this);
+    
+    if (_haveHit) {
+        SGMatrixd toWorld = transform.getToWorldTransform(_time);
+        SGVec3d localStart = _lineSegment.getStart();
+        _linearVelocity += transform.getLinearVelocityAt(localStart);
+        _angularVelocity += transform.getAngularVelocity();
+        _linearVelocity = toWorld.xformVec(_linearVelocity);
+        _angularVelocity = toWorld.xformVec(_angularVelocity);
+        SGVec3d localEnd = _lineSegment.getEnd();
+        _lineSegment.set(lineSegment.getStart(), toWorld.xformPt(localEnd));
+        _normal = toWorld.xformVec(_normal);
+        if (!_id)
+            _id = transform.getId();
+    } else {
+        _lineSegment = lineSegment;
+        _haveHit = haveHit;
+    }
+}
+
+void
+BVHLineSegmentVisitor::apply(BVHLineGeometry&)
+{
+}
+    
+void
+BVHLineSegmentVisitor::apply(BVHStaticGeometry& node)
+{
+    if (!intersects(_lineSegment, node.getBoundingSphere()))
+        return;
+    node.traverse(*this);
+}
+
+void
+BVHLineSegmentVisitor::apply(const BVHStaticBinary& node,
+                             const BVHStaticData& data)
+{
+    if (!intersects(SGLineSegmentf(_lineSegment), node.getBoundingBox()))
+        return;
+    
+    // The first box to enter is the one the startpoint is in.
+    // this increases the probability, that on exit of that box we do not
+    // even need to walk the other one, since the line segment is
+    // then already short enough to not intersect the other one anymore.
+    node.traverse(*this, data, _lineSegment.getStart());
+}
+
+void
+BVHLineSegmentVisitor::apply(const BVHStaticTriangle& triangle,
+                             const BVHStaticData& data)
+{
+    SGTrianglef tri = triangle.getTriangle(data);
+    SGVec3f point;
+    if (!intersects(point, tri, SGLineSegmentf(_lineSegment), 1e-4f))
+        return;
+    setLineSegmentEnd(SGVec3d(point));
+    _normal = SGVec3d(tri.getNormal());
+    _linearVelocity = SGVec3d::zeros();
+    _angularVelocity = SGVec3d::zeros();
+    _material = data.getMaterial(triangle.getMaterialIndex());
+    _id = 0;
+    _haveHit = true;
+}
+
+
+}

simgear/bvh/BVHLineSegmentVisitor.hxx

@@ -0,0 +1,100 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHLineSegmentVisitor_hxx
+#define BVHLineSegmentVisitor_hxx
+
+#include <simgear/math/SGGeometry.hxx>
+#include <simgear/structure/SGSharedPtr.hxx>
+
+#include "BVHVisitor.hxx"
+#include "BVHNode.hxx"
+
+namespace simgear {
+
+class BVHMaterial;
+
+class BVHLineSegmentVisitor : public BVHVisitor {
+public:
+    BVHLineSegmentVisitor(const SGLineSegmentd& lineSegment,
+                          const double& t = 0) :
+        _lineSegment(lineSegment),
+        _time(t),
+        _material(0),
+        _id(0),
+        _haveHit(false)
+    { }
+    virtual ~BVHLineSegmentVisitor()
+    { }
+    
+    bool empty() const
+    { return !_haveHit; }
+    
+    const SGLineSegmentd& getLineSegment() const
+    { return _lineSegment; }
+    
+    SGVec3d getPoint() const
+    { return _lineSegment.getEnd(); }
+    const SGVec3d& getNormal() const
+    { return _normal; }
+    const SGVec3d& getLinearVelocity() const
+    { return _linearVelocity; }
+    const SGVec3d& getAngularVelocity() const
+    { return _angularVelocity; }
+    const BVHMaterial* getMaterial() const
+    { return _material; }
+    BVHNode::Id getId() const
+    { return _id; }
+
+    virtual void apply(BVHGroup& group);
+    virtual void apply(BVHPageNode& node);
+    virtual void apply(BVHTransform& transform);
+    virtual void apply(BVHMotionTransform& transform);
+    virtual void apply(BVHLineGeometry&);
+    virtual void apply(BVHStaticGeometry& node);
+    
+    virtual void apply(const BVHStaticBinary&, const BVHStaticData&);
+    virtual void apply(const BVHStaticTriangle&, const BVHStaticData&);
+    
+protected:
+    void setLineSegmentEnd(const SGVec3d& end)
+    {
+        // Ok, you need to make sure that the new end is in the previous
+        // direction and that the line segment is not enlarged by that call.
+#ifndef _NDEBUG
+        // FIXME insert code to check this...
+#endif
+        _lineSegment.set(_lineSegment.getStart(), end);
+    }
+    
+private:
+    SGLineSegmentd _lineSegment;
+    double _time;
+    
+    // belongs in a derived class
+    SGVec3d _normal;
+    SGVec3d _linearVelocity;
+    SGVec3d _angularVelocity;
+    const BVHMaterial* _material;
+    BVHNode::Id _id;
+    
+    bool _haveHit;
+};
+
+}
+
+#endif

simgear/bvh/BVHMaterial.cxx

@@ -0,0 +1,35 @@
+// Copyright (C) 2008 - 2012  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#include "BVHMaterial.hxx"
+
+namespace simgear {
+
+BVHMaterial::BVHMaterial() :
+    _solid(true),
+    _friction_factor(1),
+    _rolling_friction(0.02),
+    _bumpiness(0),
+    _load_resistance(1e30)
+{
+}
+
+BVHMaterial::~BVHMaterial()
+{
+}
+
+}

simgear/bvh/BVHMaterial.hxx

@@ -0,0 +1,75 @@
+// Copyright (C) 2008 - 2012  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHMaterial_hxx
+#define BVHMaterial_hxx
+
+#include <simgear/structure/SGReferenced.hxx>
+
+namespace simgear {
+
+class BVHMaterial : public SGReferenced {
+public:
+    BVHMaterial();
+    virtual ~BVHMaterial();
+
+    /**
+     * Return if the surface material is solid, if it is not solid, a fluid
+     * can be assumed, that is usually water.
+     */
+    bool get_solid () const { return _solid; }
+    
+    /**
+     * Get the friction factor for that material
+     */
+    double get_friction_factor () const { return _friction_factor; }
+    
+    /**
+     * Get the rolling friction for that material
+     */
+    double get_rolling_friction () const { return _rolling_friction; }
+    
+    /**
+     * Get the bumpines for that material
+     */
+    double get_bumpiness () const { return _bumpiness; }
+    
+    /**
+     * Get the load resistance
+     */
+    double get_load_resistance () const { return _load_resistance; }
+
+protected:    
+    // True if the material is solid, false if it is a fluid
+    bool _solid;
+    
+    // the friction factor of that surface material
+    double _friction_factor;
+    
+    // the rolling friction of that surface material
+    double _rolling_friction;
+    
+    // the bumpiness of that surface material
+    double _bumpiness;
+    
+    // the load resistance of that surface material
+    double _load_resistance;
+};
+
+}
+
+#endif

simgear/bvh/BVHMotionTransform.cxx

@@ -0,0 +1,120 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
+#include "BVHMotionTransform.hxx"
+
+#include "BVHVisitor.hxx"
+#include "BVHNode.hxx"
+#include "BVHGroup.hxx"
+
+namespace simgear {
+
+BVHMotionTransform::BVHMotionTransform() :
+    _toWorldReference(SGMatrixd::unit()),
+    _toLocalReference(SGMatrixd::unit()),
+    _toWorldAmplification(1),
+    _toLocalAmplification(1),
+    _linearVelocity(0, 0, 0),
+    _angularVelocity(0, 0, 0),
+    _referenceTime(0),
+    _startTime(0),
+    _endTime(0),
+    _id(0)
+{
+}
+
+BVHMotionTransform::~BVHMotionTransform()
+{
+}
+
+void
+BVHMotionTransform::accept(BVHVisitor& visitor)
+{
+    visitor.apply(*this);
+}
+
+void
+BVHMotionTransform::setTransform(const BVHMotionTransform& transform)
+{
+    _toWorldReference = transform._toWorldReference;
+    _toLocalReference = transform._toLocalReference;
+    _toWorldAmplification = transform._toWorldAmplification;
+    _toLocalAmplification = transform._toLocalAmplification;
+    _linearVelocity = transform._linearVelocity;
+    _angularVelocity = transform._angularVelocity;
+    _referenceTime = transform._referenceTime;
+    _startTime = transform._startTime;
+    _endTime = transform._endTime;
+    _id = transform._id;
+    invalidateParentBound();
+}
+
+void
+BVHMotionTransform::setToWorldTransform(const SGMatrixd& transform)
+{
+    _toWorldReference = transform;
+    invert(_toLocalReference, transform);
+    updateAmplificationFactors();
+    invalidateParentBound();
+}
+
+void
+BVHMotionTransform::setToLocalTransform(const SGMatrixd& transform)
+{
+    _toLocalReference = transform;
+    invert(_toWorldReference, transform);
+    updateAmplificationFactors();
+    invalidateParentBound();
+}
+
+SGSphered
+BVHMotionTransform::computeBoundingSphere() const
+{
+    SGSphered sphere(BVHGroup::computeBoundingSphere());
+    if (sphere.empty())
+        return sphere;
+    SGMatrixd toWorldStart = getToWorldTransform(_startTime);
+    SGVec3d centerStart = toWorldStart.xformPt(sphere.getCenter());
+    SGMatrixd toWorldEnd = getToWorldTransform(_endTime);
+    SGVec3d centerEnd = toWorldEnd.xformPt(sphere.getCenter());
+    double rad = 0.5*length(centerStart - centerEnd) + sphere.getRadius();
+    rad *= _toWorldAmplification;
+    return SGSphered(0.5*(centerStart + centerEnd), rad);
+}
+
+void
+BVHMotionTransform::updateAmplificationFactors()
+{
+    // Hmm, this is just a hint, true?
+    // But anyway, almost all transforms in a scenegraph will
+    // have them equal to 1 ...
+    double r = norm(_toWorldReference.xformVec(SGVec3d(1, 0, 0)));
+	r = SGMiscd::max(r, norm(_toWorldReference.xformVec(SGVec3d(0, 1, 0))));
+    r = SGMiscd::max(r, norm(_toWorldReference.xformVec(SGVec3d(0, 0, 1))));
+    _toWorldAmplification = r;
+    
+    r = norm(_toLocalReference.xformVec(SGVec3d(1, 0, 0)));
+    r = SGMiscd::max(r, norm(_toLocalReference.xformVec(SGVec3d(0, 1, 0))));
+    r = SGMiscd::max(r, norm(_toLocalReference.xformVec(SGVec3d(0, 0, 1))));
+    _toLocalAmplification = r;
+}
+
+}

simgear/bvh/BVHMotionTransform.hxx

@@ -0,0 +1,126 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHMotionTransform_hxx
+#define BVHMotionTransform_hxx
+
+#include "BVHVisitor.hxx"
+#include "BVHNode.hxx"
+#include "BVHGroup.hxx"
+
+namespace simgear {
+
+class BVHMotionTransform : public BVHGroup {
+public:
+    BVHMotionTransform();
+    virtual ~BVHMotionTransform();
+
+    virtual void accept(BVHVisitor& visitor);
+
+    void setTransform(const BVHMotionTransform& transform);
+    void setToWorldTransform(const SGMatrixd& transform);
+    void setToLocalTransform(const SGMatrixd& transform);
+
+    void setLinearVelocity(const SGVec3d& linearVelocity)
+    { _linearVelocity = linearVelocity; }
+    const SGVec3d& getLinearVelocity() const
+    { return _linearVelocity; }
+
+    void setAngularVelocity(const SGVec3d& angularVelocity)
+    { _angularVelocity = angularVelocity; }
+    const SGVec3d& getAngularVelocity() const
+    { return _angularVelocity; }
+
+    void setReferenceTime(const double& referenceTime)
+    { _referenceTime = referenceTime; }
+    const double& getReferenceTime() const
+    { return _referenceTime; }
+
+    void setStartTime(const double& startTime)
+    { _startTime = startTime; }
+    const double& getStartTime() const
+    { return _startTime; }
+
+    void setEndTime(const double& endTime)
+    { _endTime = endTime; }
+    const double& getEndTime() const
+    { return _endTime; }
+    
+    SGMatrixd getToWorldTransform(const double& t) const
+    {
+        if (t == _referenceTime)
+            return _toWorldReference;
+        double dt = t - _referenceTime;
+        SGMatrixd matrix(_toWorldReference);
+        matrix.postMultRotate(SGQuatd::fromAngleAxis(dt*_angularVelocity));
+        matrix.postMultTranslate(dt*_linearVelocity);
+        return matrix;
+    }
+    SGMatrixd getToLocalTransform(const double& t) const
+    {
+        if (t == _referenceTime)
+            return _toLocalReference;
+        double dt = _referenceTime - t;
+        SGMatrixd matrix(_toLocalReference);
+        matrix.preMultRotate(SGQuatd::fromAngleAxis(dt*_angularVelocity));
+        matrix.preMultTranslate(dt*_linearVelocity);
+        return matrix;
+    }
+
+    const SGMatrixd& getToWorldReferenceTransform() const
+    { return _toWorldReference; }
+    const SGMatrixd& getToLocalReferenceTransform() const
+    { return _toLocalReference; }
+
+    SGVec3d getLinearVelocityAt(const SGVec3d& reference) const
+    { return _linearVelocity + cross(_angularVelocity, reference); }
+
+    SGSphered sphereToLocal(const SGSphered& sphere, const double& t) const
+    {
+        SGMatrixd matrix = getToLocalTransform(t);
+        SGVec3d center = matrix.xformPt(sphere.getCenter());
+        double radius = _toLocalAmplification*sphere.getRadius();
+        return SGSphered(center, radius);
+    }
+
+    void setId(Id id)
+    { _id = id; }
+    Id getId() const
+    { return _id; }
+
+private:
+    virtual SGSphered computeBoundingSphere() const;
+    void updateAmplificationFactors();
+    
+    SGMatrixd _toWorldReference;
+    SGMatrixd _toLocalReference;
+    double _toWorldAmplification;
+    double _toLocalAmplification;
+
+    SGVec3d _linearVelocity;
+    SGVec3d _angularVelocity;
+
+    double _referenceTime;
+    double _startTime;
+    double _endTime;
+
+    Id _id;
+};
+
+}
+
+#endif

simgear/bvh/BVHNearestPointVisitor.hxx

@@ -0,0 +1,173 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHNearestPointVisitor_hxx
+#define BVHNearestPointVisitor_hxx
+
+#include <simgear/math/SGGeometry.hxx>
+
+#include "BVHVisitor.hxx"
+
+#include "BVHNode.hxx"
+#include "BVHGroup.hxx"
+#include "BVHPageNode.hxx"
+#include "BVHTransform.hxx"
+#include "BVHLineGeometry.hxx"
+#include "BVHStaticGeometry.hxx"
+
+#include "BVHStaticData.hxx"
+
+#include "BVHStaticNode.hxx"
+#include "BVHStaticTriangle.hxx"
+#include "BVHStaticBinary.hxx"
+
+namespace simgear {
+
+class BVHNearestPointVisitor : public BVHVisitor {
+public:
+    BVHNearestPointVisitor(const SGSphered& sphere, const double& t) :
+        _sphere(sphere),
+        _time(t),
+        _material(0),
+        _id(0),
+        _havePoint(false)
+    { }
+    
+    virtual void apply(BVHGroup& leaf)
+    {
+        if (!intersects(_sphere, leaf.getBoundingSphere()))
+            return;
+        leaf.traverse(*this);
+    }
+    virtual void apply(BVHPageNode& leaf)
+    {
+        if (!intersects(_sphere, leaf.getBoundingSphere()))
+            return;
+        leaf.traverse(*this);
+    }
+    virtual void apply(BVHTransform& transform)
+    {
+        if (!intersects(_sphere, transform.getBoundingSphere()))
+            return;
+        
+        SGSphered sphere = _sphere;
+        _sphere = transform.sphereToLocal(sphere);
+        bool havePoint = _havePoint;
+        _havePoint = false;
+        
+        transform.traverse(*this);
+        
+        if (_havePoint) {
+            _point = transform.ptToWorld(_point);
+            _linearVelocity = transform.vecToWorld(_linearVelocity);
+            _angularVelocity = transform.vecToWorld(_angularVelocity);
+        }
+        _havePoint |= havePoint;
+        _sphere.setCenter(sphere.getCenter());
+    }
+    virtual void apply(BVHMotionTransform& transform)
+    {
+        if (!intersects(_sphere, transform.getBoundingSphere()))
+            return;
+        
+        SGSphered sphere = _sphere;
+        _sphere = transform.sphereToLocal(sphere, _time);
+        bool havePoint = _havePoint;
+        _havePoint = false;
+        
+        transform.traverse(*this);
+        
+        if (_havePoint) {
+            SGMatrixd toWorld = transform.getToWorldTransform(_time);
+            SGVec3d localCenter = _sphere.getCenter();
+            _linearVelocity += transform.getLinearVelocityAt(localCenter);
+            _angularVelocity += transform.getAngularVelocity();
+            _linearVelocity = toWorld.xformVec(_linearVelocity);
+            _angularVelocity = toWorld.xformVec(_angularVelocity);
+            _point = toWorld.xformPt(_point);
+            if (!_id)
+                _id = transform.getId();
+        }
+        _havePoint |= havePoint;
+        _sphere.setCenter(sphere.getCenter());
+    }
+    virtual void apply(BVHLineGeometry& node)
+    { }
+    virtual void apply(BVHStaticGeometry& node)
+    {
+        if (!intersects(_sphere, node.getBoundingSphere()))
+            return;
+        node.traverse(*this);
+    }
+    
+    virtual void apply(const BVHStaticBinary& node, const BVHStaticData& data)
+    {
+        if (!intersects(_sphere, node.getBoundingBox()))
+            return;
+        node.traverse(*this, data, _sphere.getCenter());
+    }
+    virtual void apply(const BVHStaticTriangle& node, const BVHStaticData& data)
+    {
+        SGVec3f center(_sphere.getCenter());
+        SGVec3d closest(closestPoint(node.getTriangle(data), center));
+        if (!intersects(_sphere, closest))
+            return;
+        _point = closest;
+        _linearVelocity = SGVec3d::zeros();
+        _angularVelocity = SGVec3d::zeros();
+        _material = data.getMaterial(node.getMaterialIndex());
+        // The trick is to decrease the radius of the search sphere.
+        _sphere.setRadius(length(closest - _sphere.getCenter()));
+        _havePoint = true;
+        _id = 0;
+    }
+    
+    void setSphere(const SGSphered& sphere)
+    { _sphere = sphere; }
+    const SGSphered& getSphere() const
+    { return _sphere; }
+    
+    const SGVec3d& getPoint() const
+    { return _point; }
+    const SGVec3d& getLinearVelocity() const
+    { return _linearVelocity; }
+    const SGVec3d& getAngularVelocity() const
+    { return _angularVelocity; }
+    const BVHMaterial* getMaterial() const
+    { return _material; }
+    BVHNode::Id getId() const
+    { return _id; }
+    
+    bool empty() const
+    { return !_havePoint; }
+    
+private:
+    SGSphered _sphere;
+    double _time;
+
+    SGVec3d _point;
+    SGVec3d _linearVelocity;
+    SGVec3d _angularVelocity;
+    const BVHMaterial* _material;
+    BVHNode::Id _id;
+
+    bool _havePoint;
+};
+
+}
+
+#endif

simgear/bvh/BVHNode.cxx

@@ -0,0 +1,80 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#include "BVHNode.hxx"
+
+#include <algorithm>
+#include <simgear/structure/SGAtomic.hxx>
+#include <simgear/math/SGGeometry.hxx>
+
+namespace simgear {
+
+BVHNode::BVHNode() :
+    _dirtyBoundingSphere(true)
+{
+}
+
+BVHNode::~BVHNode()
+{
+}
+
+BVHNode::Id
+BVHNode::getNewId()
+{
+    static SGAtomic id(0);
+    return ++id;
+}
+
+void
+BVHNode::addParent(BVHNode* parent)
+{
+    // should not happen, but be paranoid ...
+    ParentList::iterator i;
+    i = std::find(_parents.begin(), _parents.end(), parent);
+    if (i != _parents.end())
+        return;
+    // add to the parents list ...
+    _parents.push_back(parent);
+}
+
+void
+BVHNode::removeParent(BVHNode* parent)
+{
+    ParentList::iterator i;
+    i = std::find(_parents.begin(), _parents.end(), parent);
+    if (i == _parents.end())
+        return;
+    _parents.erase(i);
+}
+
+void
+BVHNode::invalidateParentBound()
+{
+    for (ParentList::iterator i = _parents.begin(); i != _parents.end(); ++i)
+        (*i)->invalidateBound();
+}
+
+void
+BVHNode::invalidateBound()
+{
+    if (_dirtyBoundingSphere)
+        return;
+    invalidateParentBound();
+    _dirtyBoundingSphere = true;
+}
+
+}

simgear/bvh/BVHNode.hxx

@@ -0,0 +1,76 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHNode_hxx
+#define BVHNode_hxx
+
+#include <vector>
+#include <simgear/math/SGGeometry.hxx>
+#include <simgear/structure/SGReferenced.hxx>
+
+namespace simgear {
+
+class BVHGroup;
+class BVHVisitor;
+class BVHPageNode;
+
+// Base for the tree nodes
+class BVHNode : public SGReferenced {
+public:
+    BVHNode();
+    virtual ~BVHNode();
+    
+    // visitors ...
+    virtual void accept(BVHVisitor& visitor) = 0;
+    
+    const SGSphered& getBoundingSphere() const
+    {
+        if (_dirtyBoundingSphere) {
+            _boundingSphere = computeBoundingSphere();
+            _dirtyBoundingSphere = false;
+        }
+        return _boundingSphere;
+    }
+    virtual SGSphered computeBoundingSphere() const = 0;
+
+    /// A unique id for some kind of BVHNodes.
+    /// Currently only motions transforms.
+    typedef unsigned Id;
+
+    // Factory to get a new id
+    static Id getNewId();
+    
+protected:
+    friend class BVHGroup;
+    friend class BVHPageNode;
+    void addParent(BVHNode* parent);
+    void removeParent(BVHNode* parent);
+    
+    void invalidateParentBound();
+    virtual void invalidateBound();
+    
+private:
+    mutable bool _dirtyBoundingSphere;
+    mutable SGSphered _boundingSphere;
+    
+    typedef std::vector<BVHNode*> ParentList;
+    ParentList _parents;
+};
+
+}
+
+#endif

simgear/bvh/BVHPageNode.cxx

@@ -0,0 +1,40 @@
+// Copyright (C) 2008 - 2012  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#include "BVHPageNode.hxx"
+
+#include "BVHPager.hxx"
+
+namespace simgear {
+
+BVHPageNode::BVHPageNode() :
+    _useStamp(0),
+    _requested(false)
+{
+}
+
+BVHPageNode::~BVHPageNode()
+{
+}
+
+void
+BVHPageNode::accept(BVHVisitor& visitor)
+{
+    visitor.apply(*this);
+}
+
+}

simgear/bvh/BVHPageNode.hxx

@@ -0,0 +1,66 @@
+// Copyright (C) 2008 - 2012  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHPageNode_hxx
+#define BVHPageNode_hxx
+
+#include <list>
+
+#include <simgear/structure/SGSharedPtr.hxx>
+
+#include "BVHGroup.hxx"
+#include "BVHVisitor.hxx"
+
+namespace simgear {
+
+class BVHPager;
+class BVHPageRequest;
+
+class BVHPageNode : public BVHGroup {
+public:
+    BVHPageNode();
+    virtual ~BVHPageNode();
+    
+    virtual void accept(BVHVisitor& visitor);
+
+    /// Return the usage stamp of the last access
+    unsigned getUseStamp() const
+    { return _useStamp; }
+
+    virtual SGSphered computeBoundingSphere() const = 0;
+
+    virtual BVHPageRequest* newRequest() = 0;
+
+protected:
+    virtual void invalidateBound() = 0;
+
+    bool getRequested() const
+    { return _requested; }
+    void setRequested(bool requested)
+    { _requested = requested; }
+
+private:
+    friend class BVHPager;
+
+    std::list<SGSharedPtr<BVHPageNode> >::iterator _iterator;
+    unsigned _useStamp;
+    bool _requested;
+};
+
+}
+
+#endif

simgear/bvh/BVHPageRequest.cxx

@@ -0,0 +1,26 @@
+// Copyright (C) 2008 - 2012 Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#include "BVHPageRequest.hxx"
+
+namespace simgear {
+
+BVHPageRequest::~BVHPageRequest()
+{
+}
+
+}

simgear/bvh/BVHPageRequest.hxx

@@ -0,0 +1,42 @@
+// Copyright (C) 2008 - 2012 Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHPageRequest_hxx
+#define BVHPageRequest_hxx
+
+#include <simgear/structure/SGReferenced.hxx>
+
+namespace simgear {
+
+class BVHPageNode;
+
+class BVHPageRequest : public SGReferenced {
+public:
+    virtual ~BVHPageRequest();
+
+    /// Happens in the pager thread, do not modify the calling bvh tree
+    virtual void load() = 0;
+    /// Happens in the bvh main thread where the bvh is actually used.
+    /// So inside here it is safe to modify the paged node
+    virtual void insert() = 0;
+    /// The page node this request is for
+    virtual BVHPageNode* getPageNode() = 0;
+};
+
+}
+
+#endif

simgear/bvh/BVHPager.cxx

@@ -0,0 +1,236 @@
+// Copyright (C) 2008 - 2012  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#include "BVHPager.hxx"
+
+#include <list>
+
+#include <simgear/threads/SGThread.hxx>
+#include <simgear/threads/SGGuard.hxx>
+
+#include "BVHPageNode.hxx"
+#include "BVHPageRequest.hxx"
+
+namespace simgear {
+
+struct BVHPager::_PrivateData : protected SGThread {
+    typedef SGSharedPtr<BVHPageRequest> _Request;
+    typedef std::list<_Request> _RequestList;
+    typedef std::list<SGSharedPtr<BVHPageNode> > _PageNodeList;
+    
+    struct _LockedQueue {
+        void _push(const _Request& request)
+        {
+            SGGuard<SGMutex> scopeLock(_mutex);
+            _requestList.push_back(request);
+        }
+        _Request _pop()
+        {
+            SGGuard<SGMutex> scopeLock(_mutex);
+            if (_requestList.empty())
+                return _Request();
+            _Request request;
+            request.swap(_requestList.front());
+            _requestList.pop_front();
+            return request;
+        }
+    private:
+        SGMutex _mutex;
+        _RequestList _requestList;
+    };
+    
+    struct _WorkQueue {
+        void _stop()
+        {
+            _push(_Request());
+        }
+        void _push(const _Request& request)
+        {
+            SGGuard<SGMutex> scopeLock(_mutex);
+            bool needSignal = _requestList.empty();
+            _requestList.push_back(request);
+            if (needSignal)
+                _waitCondition.signal();
+        }
+        _Request _pop()
+        {
+            SGGuard<SGMutex> scopeLock(_mutex);
+            while (_requestList.empty())
+                _waitCondition.wait(_mutex);
+            _Request request;
+            request.swap(_requestList.front());
+            _requestList.pop_front();
+            return request;
+        }
+    private:
+        SGMutex _mutex;
+        SGWaitCondition _waitCondition;
+        _RequestList _requestList;
+    };
+
+    _PrivateData() :
+        _started(false),
+        _useStamp(0)
+    {
+    }
+    virtual ~_PrivateData()
+    {
+        _stop();
+    }
+
+    virtual void run()
+    {
+        for (;;) {
+            _Request request = _pendingRequests._pop();
+            // This means stop working
+            if (!request.valid())
+                return;
+            request->load();
+            _processedRequests._push(request);
+        }
+    }
+
+    bool _start()
+    {
+        if (_started)
+            return true;
+        if (!start())
+            return false;
+        _started = true;
+        return true;
+    }
+    
+    void _stop()
+    {
+        if (!_started)
+            return;
+        // send a stop request ...
+        _pendingRequests._stop();
+        // ... and wait for the thread to finish
+        join();
+        _started = false;
+    }
+
+    void _use(BVHPageNode& pageNode)
+    {
+        if (pageNode._requested) {
+            // move it forward in the lru list
+            _pageNodeList.splice(_pageNodeList.end(), _pageNodeList,
+                                 pageNode._iterator);
+        } else {
+            _Request request = pageNode.newRequest();
+            if (!request.valid())
+                return;
+
+            pageNode._iterator = _pageNodeList.insert(_pageNodeList.end(),
+                                                      &pageNode);
+            pageNode._requested = true;
+
+            if (_started) {
+                _pendingRequests._push(request);
+            } else {
+                request->load();
+                request->insert();
+            }
+        }
+        pageNode._useStamp = _useStamp;
+    }
+
+    void _update(unsigned expiry)
+    {
+        // Insert all processed requests
+        for (;;) {
+            SGSharedPtr<BVHPageRequest> request;
+            request = _processedRequests._pop();
+            if (!request.valid())
+                break;
+            request->insert();
+        }
+
+        // ... and throw away stuff that is not used for a long time
+        unsigned useStamp = _useStamp - expiry;
+        _PageNodeList::iterator i = _pageNodeList.begin();
+        while (i != _pageNodeList.end()) {
+            // Ok, this means if the highest bit in the below difference
+            // is set which is aequivalent to having a negative difference
+            // but being wraparound save.
+            unsigned diff = (*i)->_useStamp - useStamp;
+            // test the sign bit of the difference
+            if (!(diff & (~((~0u) >> 1))))
+                break;
+            (*i)->clear();
+            (*i)->_requested = false;
+            i = _pageNodeList.erase(i);
+        }
+    }
+
+    bool _started;
+    unsigned _useStamp;
+    _WorkQueue _pendingRequests;
+    _LockedQueue _processedRequests;
+    // Store the rcu list of loaded nodes so that they can expire
+    _PageNodeList _pageNodeList;
+};
+
+BVHPager::BVHPager() :
+    _privateData(new _PrivateData)
+{
+}
+
+BVHPager::~BVHPager()
+{
+    delete _privateData;
+    _privateData = 0;
+}
+
+bool
+BVHPager::start()
+{
+    return _privateData->_start();
+}
+
+void
+BVHPager::stop()
+{
+    _privateData->_stop();
+}
+
+void
+BVHPager::use(BVHPageNode& pageNode)
+{
+    _privateData->_use(pageNode);
+}
+
+void
+BVHPager::update(unsigned expiry)
+{
+    _privateData->_update(expiry);
+}
+
+void
+BVHPager::setUseStamp(unsigned stamp)
+{
+    _privateData->_useStamp = stamp;
+}
+
+unsigned
+BVHPager::getUseStamp() const
+{
+    return _privateData->_useStamp;
+}
+
+}

simgear/bvh/BVHPager.hxx

@@ -0,0 +1,60 @@
+// Copyright (C) 2008 - 2012  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHPager_hxx
+#define BVHPager_hxx
+
+#include <simgear/structure/SGSharedPtr.hxx>
+
+namespace simgear {
+
+class BVHPageNode;
+class BVHPageRequest;
+
+class BVHPager {
+public:
+    BVHPager();
+    ~BVHPager();
+
+    /// Starts the pager thread
+    bool start();
+
+    /// Stops the pager thread
+    void stop();
+
+    /// Use this page node, if loaded make it as used, if not loaded schedule
+    void use(BVHPageNode& pageNode);
+
+    /// Call this from the main thread to incorporate the processed page
+    /// requests into the bounding volume tree
+    void update(unsigned expiry);
+
+    /// The usage stamp to mark usage of BVHPageNodes
+    void setUseStamp(unsigned stamp);
+    unsigned getUseStamp() const;
+
+private:
+    BVHPager(const BVHPager&);
+    BVHPager& operator=(const BVHPager&);
+
+    struct _PrivateData;
+    _PrivateData* _privateData;
+};
+
+}
+
+#endif

simgear/bvh/BVHStaticBinary.cxx

@@ -0,0 +1,45 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#include "BVHStaticBinary.hxx"
+
+#include "BVHVisitor.hxx"
+
+namespace simgear {
+
+BVHStaticBinary::BVHStaticBinary(unsigned splitAxis,
+                                   const BVHStaticNode* leftChild,
+                                   const BVHStaticNode* rightChild,
+                                   const SGBoxf& boundingBox) :
+  _splitAxis(splitAxis),
+  _leftChild(leftChild),
+  _rightChild(rightChild),
+  _boundingBox(boundingBox)
+{
+}
+
+BVHStaticBinary::~BVHStaticBinary()
+{
+}
+
+void
+BVHStaticBinary::accept(BVHVisitor& visitor, const BVHStaticData& data) const
+{
+  visitor.apply(*this, data);
+}
+
+}

simgear/bvh/BVHStaticBinary.hxx

@@ -0,0 +1,78 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHStaticBinary_hxx
+#define BVHStaticBinary_hxx
+
+#include <simgear/math/SGGeometry.hxx>
+#include <simgear/structure/SGSharedPtr.hxx>
+#include "BVHStaticNode.hxx"
+
+namespace simgear {
+
+class BVHStaticBinary : public BVHStaticNode {
+public:
+  BVHStaticBinary(unsigned splitAxis, const BVHStaticNode* leftChild,
+                   const BVHStaticNode* rightChild, const SGBoxf& box);
+  virtual ~BVHStaticBinary();
+  virtual void accept(BVHVisitor& visitor, const BVHStaticData& data) const;
+
+  void traverse(BVHVisitor& visitor, const BVHStaticData& data) const
+  {
+    _leftChild->accept(visitor, data);
+    _rightChild->accept(visitor, data);
+  }
+
+  // Traverse call that first enters the child node that is potentially closer
+  // to the given point than the other.
+  template<typename T>
+  void traverse(BVHVisitor& visitor, const BVHStaticData& data,
+                const SGVec3<T>& pt) const
+  {
+    float center = 0.5f*(_boundingBox.getMin()[_splitAxis]
+                         + _boundingBox.getMax()[_splitAxis]);
+    if (pt[_splitAxis] < center) {
+      _leftChild->accept(visitor, data);
+      _rightChild->accept(visitor, data);
+    } else {
+      _rightChild->accept(visitor, data);
+      _leftChild->accept(visitor, data);
+    }
+  }
+
+  unsigned getSplitAxis() const
+  { return _splitAxis; }
+
+  const BVHStaticNode* getLeftChild() const
+  { return _leftChild; }
+  const BVHStaticNode* getRightChild() const
+  { return _rightChild; }
+
+  const SGBoxf& getBoundingBox() const
+  { return _boundingBox; }
+
+private:
+  // Note the order of the members, this is to avoid padding
+  unsigned _splitAxis;
+  SGSharedPtr<const BVHStaticNode> _leftChild;
+  SGSharedPtr<const BVHStaticNode> _rightChild;
+  SGBoxf _boundingBox;
+};
+
+}
+
+#endif

simgear/bvh/BVHStaticData.hxx

@@ -0,0 +1,57 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHStaticData_hxx
+#define BVHStaticData_hxx
+
+#include <vector>
+#include <simgear/structure/SGReferenced.hxx>
+#include <simgear/structure/SGSharedPtr.hxx>
+#include <simgear/math/SGGeometry.hxx>
+#include "BVHMaterial.hxx"
+
+namespace simgear {
+
+class BVHStaticData : public SGReferenced {
+public:
+    virtual ~BVHStaticData() {}
+    
+    unsigned addVertex(const SGVec3f& vertex)
+    { _vertices.push_back(vertex); return _vertices.size() - 1; }
+    const SGVec3f& getVertex(unsigned i) const
+    { return _vertices[i]; }
+    
+    
+    unsigned addMaterial(const BVHMaterial* material)
+    { _materials.push_back(material); return _materials.size() - 1; }
+    const BVHMaterial* getMaterial(unsigned i) const
+    { if (_materials.size() <= i) return 0; return _materials[i]; }
+
+    void trim()
+    {
+        std::vector<SGVec3f>(_vertices).swap(_vertices);
+        std::vector<SGSharedPtr<const BVHMaterial> >(_materials).swap(_materials);
+    }
+    
+private:
+    std::vector<SGVec3f> _vertices;
+    std::vector<SGSharedPtr<const BVHMaterial> > _materials;
+};
+
+}
+
+#endif

simgear/bvh/BVHStaticGeometry.cxx

@@ -0,0 +1,51 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#include "BVHStaticGeometry.hxx"
+
+#include "BVHBoundingBoxVisitor.hxx"
+
+namespace simgear {
+
+BVHStaticGeometry::BVHStaticGeometry(const BVHStaticNode* staticNode,
+                                     const BVHStaticData* staticData) :
+    _staticNode(staticNode),
+    _staticData(staticData)
+{
+}
+
+BVHStaticGeometry::~BVHStaticGeometry()
+{
+}
+
+void
+BVHStaticGeometry::accept(BVHVisitor& visitor)
+{
+    visitor.apply(*this);
+}
+
+SGSphered
+BVHStaticGeometry::computeBoundingSphere() const
+{
+    BVHBoundingBoxVisitor bbv;
+    _staticNode->accept(bbv, *_staticData);
+    SGSphered sphere;
+    sphere.expandBy(SGBoxd(bbv.getBox()));
+    return sphere;
+}
+
+}

simgear/bvh/BVHStaticGeometry.hxx

@@ -0,0 +1,56 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHStaticGeometry_hxx
+#define BVHStaticGeometry_hxx
+
+#include <simgear/math/SGGeometry.hxx>
+#include <simgear/structure/SGSharedPtr.hxx>
+
+#include "BVHVisitor.hxx"
+#include "BVHNode.hxx"
+#include "BVHStaticData.hxx"
+#include "BVHStaticNode.hxx"
+
+namespace simgear {
+
+class BVHStaticGeometry : public BVHNode {
+public:
+    BVHStaticGeometry(const BVHStaticNode* staticNode,
+                      const BVHStaticData* staticData);
+    virtual ~BVHStaticGeometry();
+    
+    virtual void accept(BVHVisitor& visitor);
+    
+    void traverse(BVHVisitor& visitor) const
+    { _staticNode->accept(visitor, *_staticData); }
+    
+    const BVHStaticData* getStaticData() const
+    { return _staticData; }
+    const BVHStaticNode* getStaticNode() const
+    { return _staticNode; }
+    
+    virtual SGSphered computeBoundingSphere() const;
+    
+private:
+    SGSharedPtr<const BVHStaticNode> _staticNode;
+    SGSharedPtr<const BVHStaticData> _staticData;
+};
+
+}
+
+#endif

simgear/bvh/BVHStaticGeometryBuilder.hxx

@@ -0,0 +1,228 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHStaticGeometryBuilder_hxx
+#define BVHStaticGeometryBuilder_hxx
+
+#include <algorithm>
+#include <map>
+#include <set>
+
+#include <simgear/structure/SGReferenced.hxx>
+#include <simgear/structure/SGSharedPtr.hxx>
+
+#include "BVHVisitor.hxx"
+#include "BVHNode.hxx"
+#include "BVHGroup.hxx"
+#include "BVHTransform.hxx"
+
+#include "BVHStaticData.hxx"
+
+#include "BVHStaticNode.hxx"
+#include "BVHStaticLeaf.hxx"
+#include "BVHStaticTriangle.hxx"
+#include "BVHStaticBinary.hxx"
+#include "BVHStaticGeometry.hxx"
+
+namespace simgear {
+
+class BVHStaticGeometryBuilder : public SGReferenced {
+public:
+    BVHStaticGeometryBuilder() :
+        _staticData(new BVHStaticData),
+        _currentMaterial(0),
+        _currentMaterialIndex(~0u)
+    { }
+    virtual ~BVHStaticGeometryBuilder()
+    { }
+
+    struct LeafRef {
+        LeafRef(const BVHStaticLeaf* leaf, const BVHStaticData& data) :
+            _leaf(leaf),
+            _box(_leaf->computeBoundingBox(data)),
+            _center(_leaf->computeCenter(data))
+        { }
+        SGSharedPtr<const BVHStaticLeaf> _leaf;
+        SGBoxf _box;
+        SGVec3f _center;
+    };
+    typedef std::list<LeafRef> LeafRefList;
+
+    struct LeafRefLess : public std::binary_function<LeafRef, LeafRef, bool> {
+        LeafRefLess(unsigned sortAxis) : _sortAxis(sortAxis) {}
+        bool operator()(const LeafRef& x, const LeafRef& y)
+        { return x._center[_sortAxis] < y._center[_sortAxis]; }
+        unsigned _sortAxis;
+    };
+
+    SGSharedPtr<BVHStaticData> _staticData;
+    LeafRefList _leafRefList;
+
+    typedef std::map<SGVec3f, unsigned> VertexMap;
+    VertexMap _vertexMap;
+
+    typedef std::set<SGVec3<unsigned> > TriangleSet;
+    TriangleSet _triangleSet;
+
+    void setCurrentMaterial(const BVHMaterial* material)
+    {
+        _currentMaterial = material;
+        _currentMaterialIndex = addMaterial(material);
+    }
+    const BVHMaterial* getCurrentMaterial() const
+    {
+        return _currentMaterial;
+    }
+    unsigned addMaterial(const BVHMaterial* material)
+    {
+        MaterialMap::const_iterator i = _materialMap.find(material);
+        if (i != _materialMap.end())
+            return i->second;
+        unsigned index = _staticData->addMaterial(material);
+        _materialMap[material] = index;
+        return index;
+    }
+
+    typedef std::map<const BVHMaterial*, unsigned> MaterialMap;
+    MaterialMap _materialMap;
+    const BVHMaterial* _currentMaterial;
+    unsigned _currentMaterialIndex;
+
+    void addTriangle(const SGVec3f& v1, const SGVec3f& v2, const SGVec3f& v3)
+    {
+        unsigned indices[3] = { addVertex(v1), addVertex(v2), addVertex(v3) };
+        std::sort(indices, indices + 3);
+        SGVec3<unsigned> indexKey(indices);
+        if (_triangleSet.find(indexKey) != _triangleSet.end())
+            return;
+        _triangleSet.insert(indexKey);
+        BVHStaticTriangle* staticTriangle;
+        staticTriangle = new BVHStaticTriangle(_currentMaterialIndex, indices);
+        _leafRefList.push_back(LeafRef(staticTriangle, *_staticData));
+    }
+    unsigned addVertex(const SGVec3f& v)
+    {
+        VertexMap::const_iterator i = _vertexMap.find(v);
+        if (i != _vertexMap.end())
+            return i->second;
+        unsigned index = _staticData->addVertex(v);
+        _vertexMap[v] = index;
+        return index;
+    }
+
+    BVHStaticGeometry* buildTree()
+    {
+        const BVHStaticNode* tree = buildTreeRecursive(_leafRefList);
+        if (!tree)
+            return 0;
+        _staticData->trim();
+        return new BVHStaticGeometry(tree, _staticData);
+    }
+
+private:
+    static void
+    centerSplitLeafs(unsigned splitAxis, const double& splitValue,
+                     LeafRefList& leafs, LeafRefList split[2])
+    {
+        while (!leafs.empty()) {
+            if (leafs.front()._center[splitAxis] < splitValue) {
+                split[0].splice(split[0].begin(), leafs, leafs.begin());
+            } else {
+                split[1].splice(split[1].begin(), leafs, leafs.begin());
+            }
+        }
+    }
+
+    static void
+    equalSplitLeafs(unsigned splitAxis, LeafRefList& leafs,
+                    LeafRefList split[2])
+    {
+        leafs.sort(LeafRefLess(splitAxis));
+        while (true) {
+            if (leafs.empty())
+                break;
+            split[0].splice(split[0].begin(), leafs, leafs.begin());
+            
+            if (leafs.empty())
+                break;
+            split[1].splice(split[1].begin(), leafs, --leafs.end());
+        }
+    }
+    
+    static const BVHStaticNode* buildTreeRecursive(LeafRefList& leafs)
+    {
+        // recursion termination
+        if (leafs.empty())
+            return 0;
+        // FIXME size is O(n)!!!
+        //   if (leafs.size() == 1)
+        if (++leafs.begin() == leafs.end())
+            return leafs.front()._leaf;
+        
+        SGBoxf box;
+        for (LeafRefList::const_iterator i = leafs.begin();
+             i != leafs.end(); ++i)
+            box.expandBy(i->_box);
+        
+        //   // FIXME ...
+        //   if (length(box.getSize()) < 1)
+        //     return new BVHBox(box);
+        
+        if (box.empty())
+            return 0;
+        
+        unsigned splitAxis = box.getBroadestAxis();
+        LeafRefList splitLeafs[2];
+        double splitValue = box.getCenter()[splitAxis];
+        centerSplitLeafs(splitAxis, splitValue, leafs, splitLeafs);
+        
+        if (splitLeafs[0].empty() || splitLeafs[1].empty()) {
+            for (unsigned i = 0; i < 3 ; ++i) {
+                if (i == splitAxis)
+                    continue;
+                
+                leafs.swap(splitLeafs[0]);
+                leafs.splice(leafs.begin(), splitLeafs[1]);
+                splitValue = box.getCenter()[i];
+                centerSplitLeafs(i, splitValue, leafs, splitLeafs);
+                
+                if (!splitLeafs[0].empty() && !splitLeafs[1].empty()) {
+                    splitAxis = i;
+                    break;
+                }
+            }
+        }
+        if (splitLeafs[0].empty() || splitLeafs[1].empty()) {
+            leafs.swap(splitLeafs[0]);
+            leafs.splice(leafs.begin(), splitLeafs[1]);
+            equalSplitLeafs(splitAxis, leafs, splitLeafs);
+        }
+        
+        const BVHStaticNode* child0 = buildTreeRecursive(splitLeafs[0]);
+        const BVHStaticNode* child1 = buildTreeRecursive(splitLeafs[1]);
+        if (!child0)
+            return child1;
+        if (!child1)
+            return child0;
+        
+        return new BVHStaticBinary(splitAxis, child0, child1, box);
+    }
+};
+
+}
+
+#endif

simgear/bvh/BVHStaticLeaf.cxx

@@ -0,0 +1,27 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#include "BVHStaticLeaf.hxx"
+#include "BVHVisitor.hxx"
+
+namespace simgear {
+
+BVHStaticLeaf::~BVHStaticLeaf()
+{
+}
+
+}

simgear/bvh/BVHStaticLeaf.hxx

@@ -0,0 +1,38 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHStaticLeaf_hxx
+#define BVHStaticLeaf_hxx
+
+#include <simgear/math/SGGeometry.hxx>
+#include "BVHStaticNode.hxx"
+
+namespace simgear {
+
+class BVHStaticLeaf : public BVHStaticNode {
+public:
+  virtual ~BVHStaticLeaf();
+
+  virtual void accept(BVHVisitor& visitor, const BVHStaticData& data) const = 0;
+
+  virtual SGBoxf computeBoundingBox(const BVHStaticData&) const = 0;
+  virtual SGVec3f computeCenter(const BVHStaticData&) const = 0;
+};
+
+}
+
+#endif

simgear/bvh/BVHStaticNode.cxx

@@ -0,0 +1,26 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#include "BVHStaticNode.hxx"
+
+namespace simgear {
+
+BVHStaticNode::~BVHStaticNode()
+{
+}
+
+}

simgear/bvh/BVHStaticNode.hxx

@@ -0,0 +1,37 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHStaticNode_hxx
+#define BVHStaticNode_hxx
+
+#include <simgear/structure/SGReferenced.hxx>
+
+namespace simgear {
+
+class BVHStaticData;
+class BVHVisitor;
+
+class BVHStaticNode : public SGReferenced {
+public:
+  virtual ~BVHStaticNode();
+
+  virtual void accept(BVHVisitor&, const BVHStaticData&) const = 0;
+};
+
+}
+
+#endif

simgear/bvh/BVHStaticTriangle.cxx

@@ -0,0 +1,58 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#include "BVHStaticTriangle.hxx"
+
+#include "BVHVisitor.hxx"
+
+namespace simgear {
+
+BVHStaticTriangle::BVHStaticTriangle(unsigned material,
+                                       const unsigned indices[3]) :
+  _material(material)
+{
+    for (unsigned i = 0; i < 3; ++i)
+        _indices[i] = indices[i];
+}
+
+BVHStaticTriangle::~BVHStaticTriangle()
+{
+}
+
+void
+BVHStaticTriangle::accept(BVHVisitor& visitor, const BVHStaticData& data) const
+{
+    visitor.apply(*this, data);
+}
+
+SGBoxf
+BVHStaticTriangle::computeBoundingBox(const BVHStaticData& data) const
+{
+    SGBoxf box;
+    box.expandBy(data.getVertex(_indices[0]));
+    box.expandBy(data.getVertex(_indices[1]));
+    box.expandBy(data.getVertex(_indices[2]));
+    return box;
+}
+
+SGVec3f
+BVHStaticTriangle::computeCenter(const BVHStaticData& data) const
+{
+    return getTriangle(data).getCenter();
+}
+
+}

simgear/bvh/BVHStaticTriangle.hxx

@@ -0,0 +1,54 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHStaticTriangle_hxx
+#define BVHStaticTriangle_hxx
+
+#include <simgear/math/SGGeometry.hxx>
+#include "BVHStaticData.hxx"
+#include "BVHStaticLeaf.hxx"
+
+namespace simgear {
+
+class BVHStaticTriangle : public BVHStaticLeaf {
+public:
+  BVHStaticTriangle(unsigned material, const unsigned indices[3]);
+  virtual ~BVHStaticTriangle();
+
+  virtual void accept(BVHVisitor& visitor, const BVHStaticData& data) const;
+
+  virtual SGBoxf computeBoundingBox(const BVHStaticData& data) const;
+  virtual SGVec3f computeCenter(const BVHStaticData& data) const;
+
+  SGTrianglef getTriangle(const BVHStaticData& data) const
+  {
+    return SGTrianglef(data.getVertex(_indices[0]),
+                       data.getVertex(_indices[1]),
+                       data.getVertex(_indices[2]));
+  }
+
+  unsigned getMaterialIndex() const
+  { return _material; }
+
+private:
+  unsigned _indices[3];
+  unsigned _material;
+};
+
+}
+
+#endif

simgear/bvh/BVHSubTreeCollector.cxx

@@ -0,0 +1,265 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#include "BVHSubTreeCollector.hxx"
+
+#include <simgear/math/SGGeometry.hxx>
+#include <cassert>
+
+#include "BVHNode.hxx"
+#include "BVHGroup.hxx"
+#include "BVHTransform.hxx"
+
+#include "BVHStaticData.hxx"
+
+#include "BVHStaticNode.hxx"
+#include "BVHStaticTriangle.hxx"
+#include "BVHStaticBinary.hxx"
+#include "BVHStaticGeometry.hxx"
+#include "BVHBoundingBoxVisitor.hxx"
+
+namespace simgear {
+
+BVHSubTreeCollector::BVHSubTreeCollector(const SGSphered& sphere) :
+    _sphere(sphere)
+{
+}
+
+BVHSubTreeCollector::~BVHSubTreeCollector()
+{
+}
+
+void
+BVHSubTreeCollector::apply(BVHGroup& group)
+{
+    if (!intersects(_sphere, group.getBoundingSphere()))
+        return;
+
+    // The _nodeList content is somehow the 'return value' of the subtree.
+    // Set it to zero to see if we have something to collect down there.
+    NodeList parentNodeList;
+    pushNodeList(parentNodeList);
+
+    group.traverse(*this);
+    
+    popNodeList(parentNodeList);
+}
+
+void
+BVHSubTreeCollector::apply(BVHPageNode& group)
+{
+    if (!intersects(_sphere, group.getBoundingSphere()))
+        return;
+
+    // The _nodeList content is somehow the 'return value' of the subtree.
+    // Set it to zero to see if we have something to collect down there.
+    NodeList parentNodeList;
+    pushNodeList(parentNodeList);
+
+    group.traverse(*this);
+    
+    popNodeList(parentNodeList);
+}
+
+void
+BVHSubTreeCollector::apply(BVHTransform& transform)
+{
+    if (!intersects(_sphere, transform.getBoundingSphere()))
+        return;
+    
+    SGSphered sphere = _sphere;
+    _sphere = transform.sphereToLocal(sphere);
+    
+    NodeList parentNodeList;
+    pushNodeList(parentNodeList);
+    
+    transform.traverse(*this);
+
+    if (haveChildren()) {
+        BVHTransform* currentBvTransform = new BVHTransform;
+        currentBvTransform->setTransform(transform);
+        popNodeList(parentNodeList, currentBvTransform);
+    } else {
+        popNodeList(parentNodeList);
+    }
+
+    _sphere = sphere;
+}
+
+void
+BVHSubTreeCollector::apply(BVHMotionTransform& transform)
+{
+    if (!intersects(_sphere, transform.getBoundingSphere()))
+        return;
+
+    SGSphered sphere = _sphere;
+    _sphere = transform.sphereToLocal(sphere, transform.getStartTime());
+    _sphere.expandBy(transform.sphereToLocal(sphere, transform.getEndTime()));
+    
+    NodeList parentNodeList;
+    pushNodeList(parentNodeList);
+
+    transform.traverse(*this);
+
+    if (haveChildren()) {
+        BVHMotionTransform* currentBvTransform = new BVHMotionTransform;
+        currentBvTransform->setTransform(transform);
+        popNodeList(parentNodeList, currentBvTransform);
+    } else {
+        popNodeList(parentNodeList);
+    }
+    
+    _sphere = sphere;
+}
+
+void
+BVHSubTreeCollector::apply(BVHLineGeometry& lineSegment)
+{
+    if (!intersects(_sphere, lineSegment.getBoundingSphere()))
+        return;
+    addNode(&lineSegment);
+}
+
+void
+BVHSubTreeCollector::apply(BVHStaticGeometry& node)
+{
+    if (!intersects(_sphere, node.getBoundingSphere()))
+        return;
+
+    assert(!_staticNode);
+    node.traverse(*this);
+    if (!_staticNode)
+        return;
+    
+    BVHStaticGeometry* staticTree;
+    staticTree = new BVHStaticGeometry(_staticNode, node.getStaticData());
+    addNode(staticTree);
+    _staticNode = 0;
+}
+
+void
+BVHSubTreeCollector::apply(const BVHStaticBinary& node,
+                           const BVHStaticData& data)
+{
+    assert(!_staticNode);
+    
+    if (!intersects(_sphere, node.getBoundingBox()))
+        return;
+    
+    SGVec3d corner(node.getBoundingBox().getFarestCorner(_sphere.getCenter()));
+    if (intersects(_sphere, corner)) {
+        // If the box is totally contained in the sphere, just take it all
+        _staticNode = &node;
+        
+    } else {
+        // We have still a chance to seperate something out, try it.
+        
+        node.getLeftChild()->accept(*this, data);
+        SGSharedPtr<const BVHStaticNode> leftStaticNode = _staticNode;
+        _staticNode = 0;
+        node.getRightChild()->accept(*this, data);
+        SGSharedPtr<const BVHStaticNode> rightStaticNode = _staticNode;
+        _staticNode = 0;
+        
+        if (leftStaticNode) {
+            if (rightStaticNode) {
+                BVHBoundingBoxVisitor bbv;
+                leftStaticNode->accept(bbv, data);
+                rightStaticNode->accept(bbv, data);
+                _staticNode
+                    = new BVHStaticBinary(node.getSplitAxis(), leftStaticNode,
+                                          rightStaticNode, bbv.getBox());
+            } else {
+                _staticNode = leftStaticNode;
+            }
+        } else {
+            if (rightStaticNode) {
+                _staticNode = rightStaticNode;
+            } else {
+                // Nothing to report to parents ...
+            }
+        }
+    }
+}
+
+void
+BVHSubTreeCollector::apply(const BVHStaticTriangle& node,
+                           const BVHStaticData& data)
+{
+    if (!intersects(_sphere, node.getTriangle(data)))
+        return;
+    _staticNode = &node;
+}
+
+void
+BVHSubTreeCollector::addNode(BVHNode* node)
+{
+    if (!node)
+        return;
+    if (!_nodeList.capacity())
+        _nodeList.reserve(64);
+    _nodeList.push_back(node);
+}
+    
+void
+BVHSubTreeCollector::popNodeList(NodeList& parentNodeList, BVHGroup* transform)
+{
+    // Only do something if we really have children
+    if (!_nodeList.empty()) {
+        NodeList::const_iterator i;
+        for (i = _nodeList.begin(); i != _nodeList.end(); ++i)
+            transform->addChild(*i);
+        parentNodeList.push_back(transform);
+    }
+    _nodeList.swap(parentNodeList);
+}
+    
+void
+BVHSubTreeCollector::popNodeList(NodeList& parentNodeList)
+{
+    // Only do something if we really have children
+    if (!_nodeList.empty()) {
+        if (_nodeList.size() == 1) {
+            parentNodeList.push_back(_nodeList.front());
+        } else {
+            BVHGroup* group = new BVHGroup;
+            NodeList::const_iterator i;
+            for (i = _nodeList.begin(); i != _nodeList.end(); ++i)
+                group->addChild(*i);
+            parentNodeList.push_back(group);
+        }
+    }
+    _nodeList.swap(parentNodeList);
+}
+
+SGSharedPtr<BVHNode>
+BVHSubTreeCollector::getNode() const
+{
+    if (_nodeList.empty())
+        return 0;
+    
+    if (_nodeList.size() == 1)
+        return _nodeList.front();
+    
+    BVHGroup* group = new BVHGroup;
+    NodeList::const_iterator i;
+    for (i = _nodeList.begin(); i != _nodeList.end(); ++i)
+        group->addChild(*i);
+    return group;
+}
+
+}

simgear/bvh/BVHSubTreeCollector.hxx

@@ -0,0 +1,82 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHSubTreeCollector_hxx
+#define BVHSubTreeCollector_hxx
+
+#include <simgear/math/SGGeometry.hxx>
+
+#include "BVHVisitor.hxx"
+#include "BVHNode.hxx"
+#include "BVHGroup.hxx"
+#include "BVHStaticNode.hxx"
+
+namespace simgear {
+
+/// Visitor to subcollect parts of an existing bounding volume tree.
+/// Given a sphere, it takes those sub parts of the tree that intersect the
+/// sphere. Transform nodes of any kind are preserved to be able to ask for
+/// intersections a different times. The subcollected tree is kept as small as
+/// possible as it does avoid having groups with single childs.
+/// Also the BVHStaticGeometry parts are seached for subtrees that are outside
+/// the sphere.
+
+class BVHSubTreeCollector : public BVHVisitor {
+public:
+    typedef std::vector<SGSharedPtr<BVHNode> > NodeList;
+    
+    BVHSubTreeCollector(const SGSphered& sphere = SGSphered());
+    virtual ~BVHSubTreeCollector();
+    
+    virtual void apply(BVHGroup&);
+    virtual void apply(BVHPageNode&);
+    virtual void apply(BVHTransform&);
+    virtual void apply(BVHMotionTransform&);
+    virtual void apply(BVHLineGeometry&);
+    virtual void apply(BVHStaticGeometry&);
+    
+    virtual void apply(const BVHStaticBinary&, const BVHStaticData&);
+    virtual void apply(const BVHStaticTriangle&, const BVHStaticData&);
+    
+    void setSphere(const SGSphered& sphere)
+    { _sphere = sphere; }
+    const SGSphered& getSphere() const
+    { return _sphere; }
+
+    bool haveChildren() const
+    { return !_nodeList.empty(); }
+    
+    void addNode(BVHNode* node);
+    
+    void pushNodeList(NodeList& parentNodeList)
+    { _nodeList.swap(parentNodeList); }
+    void popNodeList(NodeList& parentNodeList, BVHGroup* transform);
+    void popNodeList(NodeList& parentNodeList);
+
+    SGSharedPtr<BVHNode> getNode() const;
+    
+protected:
+    NodeList _nodeList;
+    SGSharedPtr<const BVHStaticNode> _staticNode;
+    
+private:
+    SGSphered _sphere;
+};
+
+}
+
+#endif

simgear/bvh/BVHTransform.cxx

@@ -0,0 +1,99 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
+#include "BVHTransform.hxx"
+
+#include "BVHVisitor.hxx"
+#include "BVHNode.hxx"
+#include "BVHGroup.hxx"
+
+namespace simgear {
+
+BVHTransform::BVHTransform() :
+    _toWorld(SGMatrixd::unit()),
+    _toLocal(SGMatrixd::unit()),
+    _toWorldAmplification(1),
+    _toLocalAmplification(1)
+{
+}
+
+BVHTransform::~BVHTransform()
+{
+}
+
+void
+BVHTransform::accept(BVHVisitor& visitor)
+{
+    visitor.apply(*this);
+}
+    
+void
+BVHTransform::setTransform(const BVHTransform& transform)
+{
+    _toWorld = transform._toWorld;
+    _toLocal = transform._toLocal;
+    _toWorldAmplification = transform._toWorldAmplification;
+    _toLocalAmplification = transform._toLocalAmplification;
+    invalidateParentBound();
+}
+
+void
+BVHTransform::setToWorldTransform(const SGMatrixd& transform)
+{
+    _toWorld = transform;
+    invert(_toLocal, transform);
+    updateAmplificationFactors();
+    invalidateParentBound();
+}
+
+void
+BVHTransform::setToLocalTransform(const SGMatrixd& transform)
+{
+    _toLocal = transform;
+    invert(_toWorld, transform);
+    updateAmplificationFactors();
+    invalidateParentBound();
+}
+
+SGSphered
+BVHTransform::computeBoundingSphere() const
+{
+    return sphereToWorld(BVHGroup::computeBoundingSphere());
+}
+
+void
+BVHTransform::updateAmplificationFactors()
+{
+    // Hmm, this is just a hint, true?
+    // But anyway, almost all transforms in a scenegraph will
+    // have them equal to 1 ...
+    double r = norm(vecToWorld(SGVec3d(1, 0, 0)));
+    r = std::max(r, norm(vecToWorld(SGVec3d(0, 1, 0))));
+    r = std::max(r, norm(vecToWorld(SGVec3d(0, 0, 1))));
+    _toWorldAmplification = r;
+    
+    r = norm(vecToLocal(SGVec3d(1, 0, 0)));
+    r = std::max(r, norm(vecToLocal(SGVec3d(0, 1, 0))));
+    r = std::max(r, norm(vecToLocal(SGVec3d(0, 0, 1))));
+    _toLocalAmplification = r;
+}
+
+}

simgear/bvh/BVHTransform.hxx

@@ -0,0 +1,82 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHTransform_hxx
+#define BVHTransform_hxx
+
+#include "BVHGroup.hxx"
+
+namespace simgear {
+
+class BVHTransform : public BVHGroup {
+public:
+    BVHTransform();
+    virtual ~BVHTransform();
+
+    virtual void accept(BVHVisitor& visitor);
+    
+    void setTransform(const BVHTransform& transform);
+
+    void setToWorldTransform(const SGMatrixd& transform);
+    const SGMatrixd& getToWorldTransform() const
+    { return _toWorld; }
+
+    void setToLocalTransform(const SGMatrixd& transform);
+    const SGMatrixd& getToLocalTransform() const
+    { return _toLocal; }
+    
+    SGVec3d ptToWorld(const SGVec3d& point) const
+    { return _toWorld.xformPt(point); }
+    SGVec3d ptToLocal(const SGVec3d& point) const
+    { return _toLocal.xformPt(point); }
+    
+    SGVec3d vecToWorld(const SGVec3d& vec) const
+    { return _toWorld.xformVec(vec); }
+    SGVec3d vecToLocal(const SGVec3d& vec) const
+    { return _toLocal.xformVec(vec); }
+    
+    SGLineSegmentd lineSegmentToWorld(const SGLineSegmentd& lineSeg) const
+    { return lineSeg.transform(_toWorld); }
+    SGLineSegmentd lineSegmentToLocal(const SGLineSegmentd& lineSeg) const
+    { return lineSeg.transform(_toLocal); }
+    
+    SGSphered sphereToWorld(const SGSphered& sphere) const
+    {
+        SGVec3d center = ptToWorld(sphere.getCenter());
+        double radius = _toWorldAmplification*sphere.getRadius();
+        return SGSphered(center, radius);
+    }
+    SGSphered sphereToLocal(const SGSphered& sphere) const
+    {
+        SGVec3d center = ptToLocal(sphere.getCenter());
+        double radius = _toLocalAmplification*sphere.getRadius();
+        return SGSphered(center, radius);
+    }
+
+private:
+    virtual SGSphered computeBoundingSphere() const;
+    void updateAmplificationFactors();
+    
+    SGMatrixd _toWorld;
+    SGMatrixd _toLocal;
+    double _toWorldAmplification;
+    double _toLocalAmplification;
+};
+
+}
+
+#endif

simgear/bvh/BVHVisitor.hxx

@@ -0,0 +1,58 @@
+// Copyright (C) 2008 - 2012  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#ifndef BVHVisitor_hxx
+#define BVHVisitor_hxx
+
+namespace simgear {
+
+class BVHStaticData;
+
+class BVHGroup;
+class BVHPageNode;
+class BVHTransform;
+class BVHMotionTransform;
+class BVHStaticGeometry;
+class BVHLineGeometry;
+
+class BVHStaticBinary;
+class BVHStaticTriangle;
+
+class BVHVisitor {
+public:
+    // The magnitudes of pure virtuals is because of the fact that this chaining
+    // just takes needless runtime. This declaration should force the user of
+    // this classes to implement a common functionality that should be called
+    // from each apropriate apply method directly.
+    virtual ~BVHVisitor() {}
+
+    // High level nodes to handle
+    virtual void apply(BVHGroup&) = 0;
+    virtual void apply(BVHPageNode&) = 0;
+    virtual void apply(BVHTransform&) = 0;
+    virtual void apply(BVHMotionTransform&) = 0;
+    virtual void apply(BVHLineGeometry&) = 0;
+    virtual void apply(BVHStaticGeometry&) = 0;
+    
+    // Static tree nodes to handle
+    virtual void apply(const BVHStaticBinary&, const BVHStaticData&) = 0;
+    virtual void apply(const BVHStaticTriangle&, const BVHStaticData&) = 0;
+};
+
+}
+
+#endif

simgear/bvh/CMakeLists.txt

@@ -0,0 +1,52 @@
+include (SimGearComponent)
+
+set(HEADERS
+    BVHBoundingBoxVisitor.hxx
+    BVHGroup.hxx
+    BVHLineGeometry.hxx
+    BVHLineSegmentVisitor.hxx
+    BVHMotionTransform.hxx
+    BVHNearestPointVisitor.hxx
+    BVHNode.hxx
+    BVHPageNode.hxx
+    BVHPageRequest.hxx
+    BVHPager.hxx
+    BVHStaticBinary.hxx
+    BVHStaticData.hxx
+    BVHStaticGeometry.hxx
+    BVHStaticGeometryBuilder.hxx
+    BVHStaticLeaf.hxx
+    BVHStaticNode.hxx
+    BVHStaticTriangle.hxx
+    BVHSubTreeCollector.hxx
+    BVHMaterial.hxx
+    BVHTransform.hxx
+    BVHVisitor.hxx
+)
+
+set(SOURCES
+    BVHGroup.cxx
+    BVHLineGeometry.cxx
+    BVHLineSegmentVisitor.cxx
+    BVHMotionTransform.cxx
+    BVHNode.cxx
+    BVHPageNode.cxx
+    BVHPageRequest.cxx
+    BVHPager.cxx
+    BVHStaticBinary.cxx
+    BVHStaticGeometry.cxx
+    BVHStaticLeaf.cxx
+    BVHStaticNode.cxx
+    BVHStaticTriangle.cxx
+    BVHSubTreeCollector.cxx
+    BVHMaterial.cxx
+    BVHTransform.cxx
+)
+
+simgear_component(bvh bvh "${SOURCES}" "${HEADERS}")
+
+if(ENABLE_TESTS)
+  add_executable(bvhtest bvhtest.cxx)
+  target_link_libraries(bvhtest SimGearCore)
+  add_test(bvhtest ${EXECUTABLE_OUTPUT_PATH}/bvhtest)
+endif(ENABLE_TESTS)

simgear/bvh/bvhtest.cxx

@@ -0,0 +1,142 @@
+// Copyright (C) 2008 - 2009  Mathias Froehlich - Mathias.Froehlich@web.de
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+//
+
+#include <iostream>
+#include <simgear/structure/SGSharedPtr.hxx>
+
+#include "BVHNode.hxx"
+#include "BVHGroup.hxx"
+#include "BVHTransform.hxx"
+
+#include "BVHStaticData.hxx"
+
+#include "BVHStaticNode.hxx"
+#include "BVHStaticLeaf.hxx"
+#include "BVHStaticTriangle.hxx"
+#include "BVHStaticBinary.hxx"
+#include "BVHStaticGeometry.hxx"
+
+#include "BVHBoundingBoxVisitor.hxx"
+#include "BVHSubTreeCollector.hxx"
+#include "BVHLineSegmentVisitor.hxx"
+#include "BVHNearestPointVisitor.hxx"
+
+using namespace simgear;
+
+BVHNode*
+buildSingleTriangle(const SGVec3f& v1, const SGVec3f& v2, const SGVec3f& v3)
+{
+    BVHStaticData* staticData = new BVHStaticData;
+    unsigned indices[3] = {
+        staticData->addVertex(v1),
+        staticData->addVertex(v2),
+        staticData->addVertex(v3)
+    };
+    BVHStaticTriangle* staticTriangle = new BVHStaticTriangle(~0u, indices);
+    return new BVHStaticGeometry(staticTriangle, staticData);
+}
+
+bool
+testLineIntersections()
+{
+    SGVec3f v1(-1, -1, 0);
+    SGVec3f v2(1, -1, 0);
+    SGVec3f v3(-1, 1, 0);
+    SGSharedPtr<BVHNode> node = buildSingleTriangle(v1, v2, v3);
+
+    SGLineSegmentd lineSegment(SGVec3d(0, 0, -1), SGVec3d(0, 0, 1));
+    {
+        BVHLineSegmentVisitor lineSegmentVisitor(lineSegment);
+        node->accept(lineSegmentVisitor);
+        if (lineSegmentVisitor.empty())
+            return false;
+        if (!equivalent(lineSegmentVisitor.getPoint(), SGVec3d(0, 0, 0)))
+            return false;
+    }
+
+    SGVec3d position(1000, 1000, 1000);
+    SGMatrixd matrix(position);
+    SGSharedPtr<BVHTransform> transform1 = new BVHTransform;
+    transform1->setToWorldTransform(matrix);
+    transform1->addChild(node);
+
+    SGSharedPtr<BVHTransform> transform2 = new BVHTransform;
+    transform2->setToLocalTransform(matrix);
+    transform2->addChild(transform1);
+
+    {
+        BVHLineSegmentVisitor lineSegmentVisitor(lineSegment);
+        transform2->accept(lineSegmentVisitor);
+        if (lineSegmentVisitor.empty())
+            return false;
+        if (!equivalent(lineSegmentVisitor.getPoint(), SGVec3d(0, 0, 0)))
+            return false;
+    }
+
+    SGSharedPtr<BVHMotionTransform> transform3 = new BVHMotionTransform;
+    transform3->setLinearVelocity(SGVec3d(0, 0, 1));
+    transform3->setAngularVelocity(SGVec3d(1, 0, 0));
+    transform3->addChild(node);
+
+    {
+        BVHLineSegmentVisitor lineSegmentVisitor(lineSegment, 0);
+        transform3->accept(lineSegmentVisitor);
+        if (lineSegmentVisitor.empty())
+            return false;
+        if (!equivalent(lineSegmentVisitor.getPoint(), SGVec3d(0, 0, 0)))
+            return false;
+        if (!equivalent(lineSegmentVisitor.getLinearVelocity(),
+                        SGVec3d(0, 1, 1)))
+            return false;
+        if (!equivalent(lineSegmentVisitor.getAngularVelocity(),
+                        SGVec3d(1, 0, 0)))
+            return false;
+    }
+
+    return true;
+}
+
+bool
+testNearestPoint()
+{
+    SGVec3f v1(-1, -1, 0);
+    SGVec3f v2(1, -1, 0);
+    SGVec3f v3(-1, 1, 0);
+    SGSharedPtr<BVHNode> node = buildSingleTriangle(v1, v2, v3);
+
+    SGSphered sphere(SGVec3d(0, 0, -1), 2);
+    {
+      BVHNearestPointVisitor nearestPointVisitor(sphere, 0);
+        node->accept(nearestPointVisitor);
+        if (nearestPointVisitor.empty())
+            return false;
+        if (!equivalent(nearestPointVisitor.getPoint(), SGVec3d(0, 0, 0)))
+            return false;
+    }
+
+    return true;
+}
+
+int
+main(int argc, char** argv)
+{
+    if (!testLineIntersections())
+        return EXIT_FAILURE;
+    if (!testNearestPoint())
+        return EXIT_FAILURE;
+    return EXIT_SUCCESS;
+}

simgear/canvas/CMakeLists.txt

@@ -0,0 +1,34 @@
+include (SimGearComponent)
+
+set(HEADERS
+  canvas_fwd.hxx
+  Canvas.hxx
+  CanvasEvent.hxx
+  CanvasEventListener.hxx
+  CanvasEventManager.hxx
+  CanvasEventTypes.hxx
+  CanvasEventVisitor.hxx
+  CanvasMgr.hxx
+  CanvasPlacement.hxx
+  CanvasSystemAdapter.hxx
+  MouseEvent.hxx
+  ODGauge.hxx
+  VGInitOperation.hxx
+)
+
+set(SOURCES
+  Canvas.cxx
+  CanvasEvent.cxx
+  CanvasEventListener.cxx
+  CanvasEventManager.cxx
+  CanvasEventVisitor.cxx
+  CanvasMgr.cxx
+  CanvasPlacement.cxx
+  ODGauge.cxx
+  VGInitOperation.cxx
+)
+
+add_subdirectory(ShivaVG/src)
+add_subdirectory(elements)
+
+simgear_scene_component(canvas canvas "${SOURCES}" "${HEADERS}")

simgear/canvas/Canvas.cxx

@@ -0,0 +1,552 @@
+// The canvas for rendering with the 2d API
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#include "Canvas.hxx"
+#include "CanvasEventManager.hxx"
+#include "CanvasEventVisitor.hxx"
+#include <simgear/canvas/MouseEvent.hxx>
+#include <simgear/canvas/CanvasPlacement.hxx>
+#include <simgear/scene/util/parse_color.hxx>
+#include <simgear/scene/util/RenderConstants.hxx>
+
+#include <osg/Camera>
+#include <osg/Geode>
+#include <osgText/Text>
+#include <osgViewer/Viewer>
+
+#include <boost/algorithm/string/predicate.hpp>
+#include <boost/foreach.hpp>
+#include <iostream>
+
+namespace simgear
+{
+namespace canvas
+{
+
+  //----------------------------------------------------------------------------
+  Canvas::CullCallback::CullCallback(const CanvasWeakPtr& canvas):
+    _canvas( canvas )
+  {
+
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::CullCallback::operator()( osg::Node* node,
+                                         osg::NodeVisitor* nv )
+  {
+    if( (nv->getTraversalMask() & simgear::MODEL_BIT) && !_canvas.expired() )
+      _canvas.lock()->enableRendering();
+
+    traverse(node, nv);
+  }
+
+  //----------------------------------------------------------------------------
+  Canvas::Canvas(SGPropertyNode* node):
+    PropertyBasedElement(node),
+    _canvas_mgr(0),
+    _event_manager(new EventManager),
+    _size_x(-1),
+    _size_y(-1),
+    _view_width(-1),
+    _view_height(-1),
+    _status(node, "status"),
+    _status_msg(node, "status-msg"),
+    _sampling_dirty(false),
+    _render_dirty(true),
+    _visible(true),
+    _render_always(false)
+  {
+    _status = 0;
+    setStatusFlags(MISSING_SIZE_X | MISSING_SIZE_Y);
+  }
+
+  //----------------------------------------------------------------------------
+  Canvas::~Canvas()
+  {
+
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::setSystemAdapter(const SystemAdapterPtr& system_adapter)
+  {
+    _system_adapter = system_adapter;
+    _texture.setSystemAdapter(system_adapter);
+  }
+
+  //----------------------------------------------------------------------------
+  SystemAdapterPtr Canvas::getSystemAdapter() const
+  {
+    return _system_adapter;
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::setCanvasMgr(CanvasMgr* canvas_mgr)
+  {
+    _canvas_mgr = canvas_mgr;
+  }
+
+  //----------------------------------------------------------------------------
+  CanvasMgr* Canvas::getCanvasMgr() const
+  {
+    return _canvas_mgr;
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::addDependentCanvas(const CanvasWeakPtr& canvas)
+  {
+    if( canvas.expired() )
+    {
+      SG_LOG
+      (
+        SG_GENERAL,
+        SG_WARN,
+        "Canvas::addDependentCanvas: got an expired Canvas dependent on "
+        << _node->getPath()
+      );
+      return;
+    }
+
+    _dependent_canvases.insert(canvas);
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::removeDependentCanvas(const CanvasWeakPtr& canvas)
+  {
+    _dependent_canvases.erase(canvas);
+  }
+
+  //----------------------------------------------------------------------------
+  GroupPtr Canvas::createGroup(const std::string& name)
+  {
+    return boost::dynamic_pointer_cast<Group>
+    (
+      _root_group->createChild("group", name)
+    );
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::enableRendering(bool force)
+  {
+    _visible = true;
+    if( force )
+      _render_dirty = true;
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::update(double delta_time_sec)
+  {
+    if(    (!_texture.serviceable() && _status != STATUS_DIRTY)
+        || (_status & CREATE_FAILED) )
+      return;
+
+    if( _status == STATUS_DIRTY )
+    {
+      _texture.setSize(_size_x, _size_y);
+
+      if( !_texture.serviceable() )
+      {
+        _texture.useImageCoords(true);
+        _texture.useStencil(true);
+        _texture.allocRT(/*_camera_callback*/);
+      }
+      else
+      {
+        // Resizing causes a new texture to be created so we need to reapply all
+        // existing placements
+        for(size_t i = 0; i < _placements.size(); ++i)
+        {
+          if( !_placements[i].empty() )
+            _dirty_placements.push_back( _placements[i].front()->getProps() );
+        }
+      }
+
+      osg::Camera* camera = _texture.getCamera();
+
+      osg::Vec4 clear_color(0.0f, 0.0f, 0.0f , 1.0f);
+      parseColor(_node->getStringValue("background"), clear_color);
+      camera->setClearColor(clear_color);
+
+      camera->addChild(_root_group->getMatrixTransform());
+
+      // Ensure objects are drawn in order of traversal
+      camera->getOrCreateStateSet()->setBinName("TraversalOrderBin");
+
+      if( _texture.serviceable() )
+      {
+        setStatusFlags(STATUS_OK);
+        setStatusFlags(STATUS_DIRTY, false);
+        _render_dirty = true;
+      }
+      else
+      {
+        setStatusFlags(CREATE_FAILED);
+        return;
+      }
+    }
+
+    if( _visible || _render_always )
+    {
+      if( _render_dirty )
+      {
+        // Also mark all dependent (eg. recursively used) canvases as dirty
+        BOOST_FOREACH(CanvasWeakPtr canvas, _dependent_canvases)
+        {
+          if( !canvas.expired() )
+            canvas.lock()->_render_dirty = true;
+        }
+      }
+
+      _texture.setRender(_render_dirty);
+
+      _render_dirty = false;
+      _visible = false;
+    }
+    else
+      _texture.setRender(false);
+
+    _root_group->update(delta_time_sec);
+
+    if( _sampling_dirty )
+    {
+      _texture.setSampling(
+        _node->getBoolValue("mipmapping"),
+        _node->getIntValue("coverage-samples"),
+        _node->getIntValue("color-samples")
+      );
+      _sampling_dirty = false;
+      _render_dirty = true;
+    }
+
+    while( !_dirty_placements.empty() )
+    {
+      SGPropertyNode *node = _dirty_placements.back();
+      _dirty_placements.pop_back();
+
+      if( node->getIndex() >= static_cast<int>(_placements.size()) )
+        // New placement
+        _placements.resize(node->getIndex() + 1);
+      else
+        // Remove possibly existing placements
+        _placements[ node->getIndex() ].clear();
+
+      // Get new placements
+      PlacementFactoryMap::const_iterator placement_factory =
+        _placement_factories.find( node->getStringValue("type", "object") );
+      if( placement_factory != _placement_factories.end() )
+      {
+        Placements& placements = _placements[ node->getIndex() ] =
+          placement_factory->second
+          (
+            node,
+            boost::static_pointer_cast<Canvas>(_self.lock())
+          );
+        node->setStringValue
+        (
+          "status-msg",
+          placements.empty() ? "No match" : "Ok"
+        );
+      }
+      else
+        node->setStringValue("status-msg", "Unknown placement type");
+    }
+  }
+
+  //----------------------------------------------------------------------------
+  naRef Canvas::addEventListener(const nasal::CallContext& ctx)
+  {
+    if( !_root_group.get() )
+      naRuntimeError(ctx.c, "Canvas: No root group!");
+
+    return _root_group->addEventListener(ctx);
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::setSizeX(int sx)
+  {
+    if( _size_x == sx )
+      return;
+    _size_x = sx;
+    setStatusFlags(STATUS_DIRTY);
+
+    if( _size_x <= 0 )
+      setStatusFlags(MISSING_SIZE_X);
+    else
+      setStatusFlags(MISSING_SIZE_X, false);
+
+    // reset flag to allow creation with new size
+    setStatusFlags(CREATE_FAILED, false);
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::setSizeY(int sy)
+  {
+    if( _size_y == sy )
+      return;
+    _size_y = sy;
+    setStatusFlags(STATUS_DIRTY);
+
+    if( _size_y <= 0 )
+      setStatusFlags(MISSING_SIZE_Y);
+    else
+      setStatusFlags(MISSING_SIZE_Y, false);
+
+    // reset flag to allow creation with new size
+    setStatusFlags(CREATE_FAILED, false);
+  }
+
+  //----------------------------------------------------------------------------
+  int Canvas::getSizeX() const
+  {
+    return _size_x;
+  }
+
+  //----------------------------------------------------------------------------
+  int Canvas::getSizeY() const
+  {
+    return _size_y;
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::setViewWidth(int w)
+  {
+    if( _view_width == w )
+      return;
+    _view_width = w;
+
+    _texture.setViewSize(_view_width, _view_height);
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::setViewHeight(int h)
+  {
+    if( _view_height == h )
+      return;
+    _view_height = h;
+
+    _texture.setViewSize(_view_width, _view_height);
+  }
+
+  //----------------------------------------------------------------------------
+  int Canvas::getViewWidth() const
+  {
+    return _view_width;
+  }
+
+  //----------------------------------------------------------------------------
+  int Canvas::getViewHeight() const
+  {
+    return _view_height;
+  }
+
+  //----------------------------------------------------------------------------
+  bool Canvas::handleMouseEvent(const MouseEventPtr& event)
+  {
+    if( !_root_group.get() )
+      return false;
+
+    EventVisitor visitor( EventVisitor::TRAVERSE_DOWN,
+                          event->getClientPos(),
+                          event->getDelta() );
+    if( !_root_group->accept(visitor) )
+      return false;
+
+    return _event_manager->handleEvent(event, visitor.getPropagationPath());
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::childAdded( SGPropertyNode * parent,
+                           SGPropertyNode * child )
+  {
+    if( parent != _node )
+      return;
+
+    if( child->getNameString() == "placement" )
+      _dirty_placements.push_back(child);
+    else if( _root_group.get() )
+      static_cast<Element*>(_root_group.get())->childAdded(parent, child);
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::childRemoved( SGPropertyNode * parent,
+                             SGPropertyNode * child )
+  {
+    _render_dirty = true;
+
+    if( parent != _node )
+      return;
+
+    if( child->getNameString() == "placement" )
+      _placements[ child->getIndex() ].clear();
+    else if( _root_group.get() )
+      static_cast<Element*>(_root_group.get())->childRemoved(parent, child);
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::valueChanged(SGPropertyNode* node)
+  {
+    if(    boost::starts_with(node->getNameString(), "status")
+        || node->getParent()->getNameString() == "bounding-box" )
+      return;
+    _render_dirty = true;
+
+    bool handled = true;
+    if(    node->getParent()->getParent() == _node
+        && node->getParent()->getNameString() == "placement" )
+    {
+      bool placement_dirty = false;
+      BOOST_FOREACH(Placements& placements, _placements)
+      {
+        BOOST_FOREACH(PlacementPtr& placement, placements)
+        {
+          // check if change can be directly handled by placement
+          if(    placement->getProps() == node->getParent()
+              && !placement->childChanged(node) )
+            placement_dirty = true;
+        }
+      }
+
+      if( !placement_dirty )
+        return;
+
+      // prevent double updates...
+      for( size_t i = 0; i < _dirty_placements.size(); ++i )
+      {
+        if( node->getParent() == _dirty_placements[i] )
+          return;
+      }
+
+      _dirty_placements.push_back(node->getParent());
+    }
+    else if( node->getParent() == _node )
+    {
+      if( node->getNameString() == "background" )
+      {
+        osg::Vec4 color;
+        if( _texture.getCamera() && parseColor(node->getStringValue(), color) )
+        {
+          _texture.getCamera()->setClearColor(color);
+          _render_dirty = true;
+        }
+      }
+      else if(    node->getNameString() == "mipmapping"
+              || node->getNameString() == "coverage-samples"
+              || node->getNameString() == "color-samples" )
+      {
+        _sampling_dirty = true;
+      }
+      else if( node->getNameString() == "render-always" )
+      {
+        _render_always = node->getBoolValue();
+      }
+      else if( node->getNameString() == "size" )
+      {
+        if( node->getIndex() == 0 )
+          setSizeX( node->getIntValue() );
+        else if( node->getIndex() == 1 )
+          setSizeY( node->getIntValue() );
+      }
+      else if( node->getNameString() == "view" )
+      {
+        if( node->getIndex() == 0 )
+          setViewWidth( node->getIntValue() );
+        else if( node->getIndex() == 1 )
+          setViewHeight( node->getIntValue() );
+      }
+      else if( node->getNameString() == "freeze" )
+        _texture.setRender( node->getBoolValue() );
+      else
+        handled = false;
+    }
+    else
+      handled = false;
+
+    if( !handled && _root_group.get() )
+      _root_group->valueChanged(node);
+  }
+
+  //----------------------------------------------------------------------------
+  osg::Texture2D* Canvas::getTexture() const
+  {
+    return _texture.getTexture();
+  }
+
+  //----------------------------------------------------------------------------
+  Canvas::CullCallbackPtr Canvas::getCullCallback() const
+  {
+    return _cull_callback;
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::addPlacementFactory( const std::string& type,
+                                    PlacementFactory factory )
+  {
+    if( _placement_factories.find(type) != _placement_factories.end() )
+      SG_LOG
+      (
+        SG_GENERAL,
+        SG_WARN,
+        "Canvas::addPlacementFactory: replace existing factor for type " << type
+      );
+
+    _placement_factories[type] = factory;
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::setSelf(const PropertyBasedElementPtr& self)
+  {
+    PropertyBasedElement::setSelf(self);
+
+    CanvasPtr canvas = boost::static_pointer_cast<Canvas>(self);
+
+    _root_group.reset( new Group(canvas, _node) );
+    _root_group->setSelf(_root_group);
+
+    // Remove automatically created property listener as we forward them on our
+    // own
+    _root_group->removeListener();
+
+    _cull_callback = new CullCallback(canvas);
+  }
+
+  //----------------------------------------------------------------------------
+  void Canvas::setStatusFlags(unsigned int flags, bool set)
+  {
+    if( set )
+      _status |= flags;
+    else
+      _status &= ~flags;
+
+    if( (_status & MISSING_SIZE_X) && (_status & MISSING_SIZE_Y) )
+      _status_msg = "Missing size";
+    else if( _status & MISSING_SIZE_X )
+      _status_msg = "Missing size-x";
+    else if( _status & MISSING_SIZE_Y )
+      _status_msg = "Missing size-y";
+    else if( _status & CREATE_FAILED )
+      _status_msg = "Creating render target failed";
+    else if( _status == STATUS_DIRTY )
+      _status_msg = "Creation pending...";
+    else
+      _status_msg = "Ok";
+  }
+
+  //----------------------------------------------------------------------------
+  Canvas::PlacementFactoryMap Canvas::_placement_factories;
+
+} // namespace canvas
+} // namespace simgear

simgear/canvas/Canvas.hxx

@@ -0,0 +1,182 @@
+// The canvas for rendering with the 2d API
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#ifndef CANVAS_HXX_
+#define CANVAS_HXX_
+
+#include "canvas_fwd.hxx"
+#include "ODGauge.hxx"
+
+#include <simgear/canvas/elements/CanvasGroup.hxx>
+#include <simgear/props/PropertyBasedElement.hxx>
+#include <simgear/props/propertyObject.hxx>
+#include <osg/NodeCallback>
+#include <osg/observer_ptr>
+
+#include <memory>
+#include <string>
+
+namespace simgear
+{
+namespace canvas
+{
+  class CanvasMgr;
+  class MouseEvent;
+
+  class Canvas:
+    public PropertyBasedElement
+  {
+    public:
+
+      enum StatusFlags
+      {
+        STATUS_OK,
+        STATUS_DIRTY     = 1,
+        MISSING_SIZE_X = STATUS_DIRTY << 1,
+        MISSING_SIZE_Y = MISSING_SIZE_X << 1,
+        CREATE_FAILED  = MISSING_SIZE_Y << 1
+      };
+
+      /**
+       * This callback is installed on every placement of the canvas in the
+       * scene to only render the canvas if at least one placement is visible
+       */
+      class CullCallback:
+        public osg::NodeCallback
+      {
+        public:
+          CullCallback(const CanvasWeakPtr& canvas);
+
+        private:
+          CanvasWeakPtr _canvas;
+
+          virtual void operator()(osg::Node* node, osg::NodeVisitor* nv);
+      };
+      typedef osg::ref_ptr<CullCallback> CullCallbackPtr;
+
+      Canvas(SGPropertyNode* node);
+      virtual ~Canvas();
+
+      void setSystemAdapter(const SystemAdapterPtr& system_adapter);
+      SystemAdapterPtr getSystemAdapter() const;
+
+      void setCanvasMgr(CanvasMgr* canvas_mgr);
+      CanvasMgr* getCanvasMgr() const;
+
+      /**
+       * Add a canvas which should be mared as dirty upon any change to this
+       * canvas.
+       *
+       * This mechanism is used to eg. redraw a canvas if it's displaying
+       * another canvas (recursive canvases)
+       */
+      void addDependentCanvas(const CanvasWeakPtr& canvas);
+
+      /**
+       * Stop notifying the given canvas upon changes
+       */
+      void removeDependentCanvas(const CanvasWeakPtr& canvas);
+
+      GroupPtr createGroup(const std::string& name = "");
+
+      /**
+       * Enable rendering for the next frame
+       *
+       * @param force   Force redraw even if nothing has changed (if dirty flag
+       *                is not set)
+       */
+      void enableRendering(bool force = false);
+
+      void update(double delta_time_sec);
+
+      naRef addEventListener(const nasal::CallContext& ctx);
+
+      void setSizeX(int sx);
+      void setSizeY(int sy);
+
+      int getSizeX() const;
+      int getSizeY() const;
+
+      void setViewWidth(int w);
+      void setViewHeight(int h);
+
+      int getViewWidth() const;
+      int getViewHeight() const;
+
+      bool handleMouseEvent(const MouseEventPtr& event);
+
+      virtual void childAdded( SGPropertyNode * parent,
+                               SGPropertyNode * child );
+      virtual void childRemoved( SGPropertyNode * parent,
+                                 SGPropertyNode * child );
+      virtual void valueChanged (SGPropertyNode * node);
+
+      osg::Texture2D* getTexture() const;
+
+      CullCallbackPtr getCullCallback() const;
+
+      static void addPlacementFactory( const std::string& type,
+                                       PlacementFactory factory );
+
+    protected:
+
+      SystemAdapterPtr  _system_adapter;
+      CanvasMgr        *_canvas_mgr;
+
+      std::auto_ptr<EventManager>   _event_manager;
+
+      int _size_x,
+          _size_y,
+          _view_width,
+          _view_height;
+
+      PropertyObject<int>           _status;
+      PropertyObject<std::string>   _status_msg;
+
+      bool _sampling_dirty,
+           _render_dirty,
+           _visible;
+
+      ODGauge _texture;
+      GroupPtr _root_group;
+
+      CullCallbackPtr _cull_callback;
+      bool _render_always; //<! Used to disable automatic lazy rendering (culling)
+
+      std::vector<SGPropertyNode*> _dirty_placements;
+      std::vector<Placements> _placements;
+      std::set<CanvasWeakPtr> _dependent_canvases; //<! Canvases which use this
+                                                   //   canvas and should be
+                                                   //   notified about changes
+
+      typedef std::map<std::string, PlacementFactory> PlacementFactoryMap;
+      static PlacementFactoryMap _placement_factories;
+
+      virtual void setSelf(const PropertyBasedElementPtr& self);
+      void setStatusFlags(unsigned int flags, bool set = true);
+
+    private:
+
+      Canvas(const Canvas&); // = delete;
+      Canvas& operator=(const Canvas&); // = delete;
+  };
+
+} // namespace canvas
+} // namespace simgear
+
+#endif /* CANVAS_HXX_ */

simgear/canvas/CanvasEvent.cxx

@@ -0,0 +1,98 @@
+// Canvas Event for event model similar to DOM Level 3 Event Model
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#include "CanvasEvent.hxx"
+
+namespace simgear
+{
+namespace canvas
+{
+
+  //----------------------------------------------------------------------------
+  Event::Event():
+    type(UNKNOWN),
+    propagation_stopped(false)
+  {
+
+  }
+
+  //----------------------------------------------------------------------------
+  Event::~Event()
+  {
+
+  }
+
+  //----------------------------------------------------------------------------
+  Event::Type Event::getType() const
+  {
+    return type;
+  }
+
+  //----------------------------------------------------------------------------
+  std::string Event::getTypeString() const
+  {
+    switch( type )
+    {
+#     define ENUM_MAPPING(name, str) case name: return str;
+#       include "CanvasEventTypes.hxx"
+#     undef ENUM_MAPPING
+      default:
+        return "unknown";
+    }
+  }
+
+  //----------------------------------------------------------------------------
+  ElementWeakPtr Event::getTarget() const
+  {
+    return target;
+  }
+
+  //----------------------------------------------------------------------------
+  double Event::getTime() const
+  {
+    return time;
+  }
+
+  //----------------------------------------------------------------------------
+  void Event::stopPropagation()
+  {
+    propagation_stopped = true;
+  }
+
+  //----------------------------------------------------------------------------
+  Event::Type Event::strToType(const std::string& str)
+  {
+    typedef std::map<std::string, Type> TypeMap;
+    static TypeMap type_map;
+
+    if( type_map.empty() )
+    {
+#     define ENUM_MAPPING(type, str) type_map[ str ] = type;
+#       include "CanvasEventTypes.hxx"
+#     undef ENUM_MAPPING
+    }
+
+    TypeMap::const_iterator it = type_map.find(str);
+    if( it == type_map.end() )
+      return UNKNOWN;
+
+    return it->second;
+  }
+
+} // namespace canvas
+} // namespace simgear

simgear/canvas/CanvasEvent.hxx

@@ -0,0 +1,70 @@
+// Canvas Event for event model similar to DOM Level 3 Event Model
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#ifndef CANVAS_EVENT_HXX_
+#define CANVAS_EVENT_HXX_
+
+#include "canvas_fwd.hxx"
+
+namespace simgear
+{
+namespace canvas
+{
+
+  class Event
+  {
+    public:
+
+      enum Type
+      {
+        UNKNOWN,
+#       define ENUM_MAPPING(name, str) name,
+#         include "CanvasEventTypes.hxx"
+#       undef ENUM_MAPPING
+        USER_TYPE ///<! first unused id to be used for user defined types (not
+                  ///   implemented yet)
+      };
+
+      Type              type;
+      ElementWeakPtr    target;
+      double            time;
+      bool              propagation_stopped;
+
+      Event();
+
+      // We need a vtable to allow nasal::Ghost to determine the dynamic type
+      // of the actual event instances.
+      virtual ~Event();
+
+      Type getType() const;
+      std::string getTypeString() const;
+
+      ElementWeakPtr getTarget() const;
+
+      double getTime() const;
+
+      void stopPropagation();
+
+      static Type strToType(const std::string& str);
+
+  };
+
+} // namespace canvas
+} // namespace simgear
+
+#endif /* CANVAS_EVENT_HXX_ */

simgear/canvas/CanvasEventListener.cxx

@@ -0,0 +1,70 @@
+// Listener for canvas (GUI) events being passed to a Nasal function/code
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#include "CanvasEvent.hxx"
+#include "CanvasEventListener.hxx"
+#include "CanvasSystemAdapter.hxx"
+
+#include <simgear/nasal/cppbind/Ghost.hxx>
+
+namespace simgear
+{
+namespace canvas
+{
+
+  //----------------------------------------------------------------------------
+  EventListener::EventListener(naRef code, const SystemAdapterPtr& sys_adapter):
+    _code(code),
+    _gc_key(-1),
+    _sys(sys_adapter)
+  {
+    assert( sys_adapter );
+    if(    !naIsCode(code)
+        && !naIsCCode(code)
+        && !naIsFunc(code) )
+      throw std::runtime_error
+      (
+        "canvas::EventListener: invalid function argument"
+      );
+
+    _gc_key = sys_adapter->gcSave(_code);
+  }
+
+  //----------------------------------------------------------------------------
+  EventListener::~EventListener()
+  {
+    assert( !_sys.expired() );
+    _sys.lock()->gcRelease(_gc_key);
+  }
+
+  //----------------------------------------------------------------------------
+  void EventListener::call(const canvas::EventPtr& event)
+  {
+    SystemAdapterPtr sys = _sys.lock();
+
+    naRef args[] = {
+      nasal::Ghost<EventPtr>::create(sys->getNasalContext(), event)
+    };
+    const int num_args = sizeof(args)/sizeof(args[0]);
+
+    sys->callMethod(_code, naNil(), num_args, args, naNil());
+  }
+
+
+} // namespace canvas
+} // namespace simgear

simgear/canvas/CanvasEventListener.hxx

@@ -0,0 +1,48 @@
+// Listener for canvas (GUI) events being passed to a Nasal function/code
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#ifndef CANVAS_EVENT_LISTENER_HXX_
+#define CANVAS_EVENT_LISTENER_HXX_
+
+#include "canvas_fwd.hxx"
+#include <simgear/nasal/naref.h>
+
+namespace simgear
+{
+namespace canvas
+{
+
+  class EventListener
+  {
+    public:
+      EventListener( naRef code,
+                     const SystemAdapterPtr& sys_adapter );
+      ~EventListener();
+
+      void call(const canvas::EventPtr& event);
+
+    protected:
+      naRef _code;
+      int _gc_key;
+      SystemAdapterWeakPtr _sys;
+  };
+
+} // namespace canvas
+} // namespace simgear
+
+#endif /* CANVAS_EVENT_LISTENER_HXX_ */

simgear/canvas/CanvasEventManager.cxx

@@ -0,0 +1,270 @@
+// Manage event handling inside a Canvas similar to the DOM Level 3 Event Model
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#include "CanvasEventManager.hxx"
+#include "MouseEvent.hxx"
+#include <simgear/canvas/elements/CanvasElement.hxx>
+
+namespace simgear
+{
+namespace canvas
+{
+
+  const unsigned int drag_threshold = 8;
+  const double multi_click_timeout = 0.4;
+
+  //----------------------------------------------------------------------------
+  EventManager::StampedPropagationPath::StampedPropagationPath():
+    time(0)
+  {
+
+  }
+
+  //----------------------------------------------------------------------------
+
+  EventManager::StampedPropagationPath::StampedPropagationPath(
+    const EventPropagationPath& path,
+    double time
+  ):
+    path(path),
+    time(time)
+  {
+
+  }
+
+  //----------------------------------------------------------------------------
+  void EventManager::StampedPropagationPath::clear()
+  {
+    path.clear();
+    time = 0;
+  }
+
+  //----------------------------------------------------------------------------
+  bool EventManager::StampedPropagationPath::valid() const
+  {
+    return !path.empty() && time > 0;
+  }
+
+  //----------------------------------------------------------------------------
+  EventManager::EventManager():
+    _current_click_count(0)
+  {
+
+  }
+
+  //----------------------------------------------------------------------------
+  bool EventManager::handleEvent( const MouseEventPtr& event,
+                                  const EventPropagationPath& path )
+  {
+    switch( event->type )
+    {
+      case Event::MOUSE_DOWN:
+        _last_mouse_down = StampedPropagationPath(path, event->getTime());
+        break;
+      case Event::MOUSE_UP:
+      {
+        if( _last_mouse_down.path.empty() )
+          // Ignore mouse up without any previous mouse down
+          return false;
+
+        // normal mouseup
+        propagateEvent(event, path);
+
+        // now handle click/dblclick
+        if( checkClickDistance(path, _last_mouse_down.path) )
+          handleClick(event, getCommonAncestor(_last_mouse_down.path, path));
+
+        _last_mouse_down.clear();
+
+        return true;
+      }
+      case Event::DRAG:
+        if( !_last_mouse_down.valid() )
+          return false;
+        else
+          return propagateEvent(event, _last_mouse_down.path);
+      case Event::MOUSE_MOVE:
+        handleMove(event, path);
+        break;
+      case Event::MOUSE_LEAVE:
+        // Mouse leaves window and therefore also current mouseover element
+        handleMove(event, EventPropagationPath());
+        return true;
+      case Event::WHEEL:
+        break;
+      default:
+        return false;
+    }
+
+    return propagateEvent(event, path);
+  }
+
+  //----------------------------------------------------------------------------
+  void EventManager::handleClick( const MouseEventPtr& event,
+                                  const EventPropagationPath& path )
+  {
+    MouseEventPtr click(new MouseEvent(*event));
+    click->type = Event::CLICK;
+
+    if( event->getTime() > _last_click.time + multi_click_timeout )
+      _current_click_count = 1;
+    else
+    {
+      // Maximum current click count is 3
+      _current_click_count = (_current_click_count % 3) + 1;
+
+      if( _current_click_count > 1 )
+      {
+        // Reset current click count if moved too far
+        if( !checkClickDistance(path, _last_click.path) )
+          _current_click_count = 1;
+      }
+    }
+
+    click->click_count = _current_click_count;
+
+    MouseEventPtr dbl_click;
+    if( _current_click_count == 2 )
+    {
+      dbl_click.reset(new MouseEvent(*click));
+      dbl_click->type = Event::DBL_CLICK;
+    }
+
+    propagateEvent(click, path);
+
+    if( dbl_click )
+      propagateEvent(dbl_click, getCommonAncestor(_last_click.path, path));
+
+    _last_click = StampedPropagationPath(path, event->getTime());
+  }
+
+  //----------------------------------------------------------------------------
+  void EventManager::handleMove( const MouseEventPtr& event,
+                                 const EventPropagationPath& path )
+  {
+    if( _last_mouse_over.path == path )
+      return;
+
+    if( !_last_mouse_over.path.empty() )
+    {
+      MouseEventPtr mouseout(new MouseEvent(*event));
+      mouseout->type = Event::MOUSE_OUT;
+      propagateEvent(mouseout, _last_mouse_over.path);
+    }
+
+    if( !path.empty() )
+    {
+      MouseEventPtr mouseover(new MouseEvent(*event));
+      mouseover->type = Event::MOUSE_OVER;
+      propagateEvent(mouseover, path);
+    }
+
+    _last_mouse_over.path = path;
+  }
+
+  //----------------------------------------------------------------------------
+  bool EventManager::propagateEvent( const EventPtr& event,
+                                     const EventPropagationPath& path )
+  {
+    event->target = path.back().element;
+    MouseEventPtr mouse_event = boost::dynamic_pointer_cast<MouseEvent>(event);
+
+    // Event propagation similar to DOM Level 3 event flow:
+    // http://www.w3.org/TR/DOM-Level-3-Events/#event-flow
+
+    // Capturing phase
+//    for( EventTargets::iterator it = _target_path.begin();
+//                                it != _target_path.end();
+//                              ++it )
+//    {
+//      if( it->element )
+//        std::cout << it->element->getProps()->getPath() << " "
+//                  << "(" << it->local_pos.x() << "|" << it->local_pos.y() << ")\n";
+//    }
+
+    // Bubbling phase
+    for( EventPropagationPath::const_reverse_iterator
+           it = path.rbegin();
+           it != path.rend();
+         ++it )
+    {
+      ElementPtr el = it->element.lock();
+
+      if( !el )
+        // Ignore element if it has been destroyed while traversing the event
+        // (eg. removed by another event handler)
+        continue;
+
+      // TODO provide functions to convert position and delta to local
+      //      coordinates on demand. Events shouldn't contain informations in
+      //      local coordinates as they might differe between different elements
+      //      receiving the same event.
+//      if( mouse_event && event->type != Event::DRAG )
+//      {
+//        // TODO transform pos and delta for drag events. Maybe we should just
+//        //      store the global coordinates and convert to local coordinates
+//        //      on demand.
+//
+//        // Position and delta are specified in local coordinate system of
+//        // current element
+//        mouse_event->pos = it->local_pos;
+//        mouse_event->delta = it->local_delta;
+//      }
+
+      el->callListeners(event);
+
+      if( event->propagation_stopped )
+        return true;
+    }
+
+    return true;
+  }
+
+  //----------------------------------------------------------------------------
+  bool
+  EventManager::checkClickDistance( const EventPropagationPath& path1,
+                                    const EventPropagationPath& path2 ) const
+  {
+    osg::Vec2 delta = path1.front().local_pos - path2.front().local_pos;
+    return delta.x() < drag_threshold
+        && delta.y() < drag_threshold;
+  }
+
+  //----------------------------------------------------------------------------
+  EventPropagationPath
+  EventManager::getCommonAncestor( const EventPropagationPath& path1,
+                                   const EventPropagationPath& path2 ) const
+  {
+    if( path1.back().element.lock() == path2.back().element.lock() )
+      return path2;
+
+    EventPropagationPath path;
+
+    for( size_t i = 0; i < path1.size() && i < path2.size(); ++i )
+    {
+      if( path1[i].element.lock() != path2[i].element.lock() )
+        break;
+
+      path.push_back(path2[i]);
+    }
+
+    return path;
+  }
+
+} // namespace canvas
+} // namespace simgear

simgear/canvas/CanvasEventManager.hxx

@@ -0,0 +1,100 @@
+// Manage event handling inside a Canvas similar to the DOM Level 3 Event Model
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#ifndef CANVAS_EVENT_MANAGER_HXX_
+#define CANVAS_EVENT_MANAGER_HXX_
+
+#include "canvas_fwd.hxx"
+#include <deque>
+
+namespace simgear
+{
+namespace canvas
+{
+
+  struct EventTarget
+  {
+    ElementWeakPtr  element;
+    osg::Vec2f      local_pos,
+                    local_delta;
+  };
+  typedef std::deque<EventTarget> EventPropagationPath;
+  inline bool operator==(const EventTarget& t1, const EventTarget& t2)
+  {
+    return t1.element.lock() == t2.element.lock();
+  }
+
+  class EventManager
+  {
+    public:
+      EventManager();
+
+      bool handleEvent( const MouseEventPtr& event,
+                        const EventPropagationPath& path );
+
+    protected:
+      struct StampedPropagationPath
+      {
+        StampedPropagationPath();
+        StampedPropagationPath(const EventPropagationPath& path, double time);
+
+        void clear();
+        bool valid() const;
+
+        EventPropagationPath path;
+        double time;
+      };
+
+      // TODO if we really need the paths modify to not copy around the paths
+      //      that much.
+      StampedPropagationPath _last_mouse_down,
+                             _last_click,
+                             _last_mouse_over;
+      size_t _current_click_count;
+
+      /**
+       * Propagate click event and handle multi-click (eg. create dblclick)
+       */
+      void handleClick( const MouseEventPtr& event,
+                        const EventPropagationPath& path );
+
+      /**
+       * Handle mouseover/enter/out/leave
+       */
+      void handleMove( const MouseEventPtr& event,
+                       const EventPropagationPath& path );
+
+      bool propagateEvent( const EventPtr& event,
+                           const EventPropagationPath& path );
+
+      /**
+       * Check if two click events (either mousedown/up or two consecutive
+       * clicks) are inside a maximum distance to still create a click or
+       * dblclick event respectively.
+       */
+      bool checkClickDistance( const EventPropagationPath& path1,
+                               const EventPropagationPath& path2 ) const;
+      EventPropagationPath
+      getCommonAncestor( const EventPropagationPath& path1,
+                         const EventPropagationPath& path2 ) const;
+  };
+
+} // namespace canvas
+} // namespace simgear
+
+#endif /* CANVAS_EVENT_MANAGER_HXX_ */

simgear/canvas/CanvasEventTypes.hxx

@@ -0,0 +1,33 @@
+// Mapping between canvas gui Event types and their names
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#ifndef ENUM_MAPPING
+# error "Don't include this file directly!"
+#endif
+
+ENUM_MAPPING(MOUSE_DOWN,  "mousedown")
+ENUM_MAPPING(MOUSE_UP,    "mouseup")
+ENUM_MAPPING(CLICK,       "click")
+ENUM_MAPPING(DBL_CLICK,   "dblclick")
+ENUM_MAPPING(DRAG,        "drag")
+ENUM_MAPPING(WHEEL,       "wheel")
+ENUM_MAPPING(MOUSE_MOVE,  "mousemove")
+ENUM_MAPPING(MOUSE_OVER,  "mouseover")
+ENUM_MAPPING(MOUSE_OUT,   "mouseout")
+ENUM_MAPPING(MOUSE_ENTER, "mouseenter")
+ENUM_MAPPING(MOUSE_LEAVE, "mouseleave")

simgear/canvas/CanvasEventVisitor.cxx

@@ -0,0 +1,106 @@
+// Visitor for traversing a canvas element hierarchy similar to the traversal
+// of the DOM Level 3 Event Model
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#include "CanvasEvent.hxx"
+#include "CanvasEventVisitor.hxx"
+#include <simgear/canvas/elements/CanvasElement.hxx>
+#include <iostream>
+
+namespace simgear
+{
+namespace canvas
+{
+
+  //----------------------------------------------------------------------------
+  EventVisitor::EventVisitor( TraverseMode mode,
+                              const osg::Vec2f& pos,
+                              const osg::Vec2f& delta ):
+    _traverse_mode( mode )
+  {
+    if( mode == TRAVERSE_DOWN )
+    {
+      EventTarget target = {ElementWeakPtr(), pos, delta};
+      _target_path.push_back(target);
+    }
+  }
+
+  //----------------------------------------------------------------------------
+  EventVisitor::~EventVisitor()
+  {
+
+  }
+
+  //----------------------------------------------------------------------------
+  bool EventVisitor::traverse(Element& el)
+  {
+    if( _traverse_mode == TRAVERSE_UP )
+      return el.ascend(*this);
+    else
+      return el.traverse(*this);
+  }
+
+  //----------------------------------------------------------------------------
+  bool EventVisitor::apply(Element& el)
+  {
+    // We only need to check for hits while traversing down
+    if( _traverse_mode == TRAVERSE_DOWN )
+    {
+      // Transform event to local coordinates
+      const osg::Matrix& m = el.getMatrixTransform()->getInverseMatrix();
+      const osg::Vec2f& pos = _target_path.back().local_pos;
+      const osg::Vec2f local_pos
+      (
+        m(0, 0) * pos[0] + m(1, 0) * pos[1] + m(3, 0),
+        m(0, 1) * pos[0] + m(1, 1) * pos[1] + m(3, 1)
+      );
+
+      // Don't check collision with root element (2nd element in _target_path)
+      // do event listeners attached to the canvas itself (its root group)
+      // always get called even if no element has been hit.
+      if( _target_path.size() > 2 && !el.hitBound(pos, local_pos) )
+        return false;
+
+      const osg::Vec2f& delta = _target_path.back().local_delta;
+      const osg::Vec2f local_delta
+      (
+        m(0, 0) * delta[0] + m(1, 0) * delta[1],
+        m(0, 1) * delta[0] + m(1, 1) * delta[1]
+      );
+
+      EventTarget target = {el.getWeakPtr(), local_pos, local_delta};
+      _target_path.push_back(target);
+
+      if( el.traverse(*this) || _target_path.size() <= 2 )
+        return true;
+
+      _target_path.pop_back();
+      return false;
+    }
+    else
+      return el.ascend(*this);
+  }
+
+  //----------------------------------------------------------------------------
+  const EventPropagationPath& EventVisitor::getPropagationPath() const
+  {
+    return _target_path;
+  }
+
+} // namespace canvas
+} // namespace simgear

simgear/canvas/CanvasEventVisitor.hxx

@@ -0,0 +1,61 @@
+// Visitor for traversing a canvas element hierarchy similar to the traversal
+// of the DOM Level 3 Event Model
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#ifndef CANVAS_EVENT_VISITOR_HXX_
+#define CANVAS_EVENT_VISITOR_HXX_
+
+#include "canvas_fwd.hxx"
+#include "CanvasEventManager.hxx"
+
+namespace simgear
+{
+namespace canvas
+{
+
+  class EventVisitor
+  {
+    public:
+
+      enum TraverseMode
+      {
+        TRAVERSE_UP,
+        TRAVERSE_DOWN
+      };
+
+      EventVisitor( TraverseMode mode,
+                    const osg::Vec2f& pos,
+                    const osg::Vec2f& delta );
+      virtual ~EventVisitor();
+      virtual bool traverse(Element& el);
+      virtual bool apply(Element& el);
+
+      const EventPropagationPath& getPropagationPath() const;
+
+    protected:
+
+      TraverseMode          _traverse_mode;
+      EventPropagationPath  _target_path;
+
+  };
+
+} // namespace canvas
+} // namespace simgear
+
+
+#endif /* CANVAS_EVENTVISITOR_HXX_ */

simgear/canvas/CanvasMgr.cxx

@@ -0,0 +1,73 @@
+// Canvas with 2D rendering API
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#include "CanvasMgr.hxx"
+#include "Canvas.hxx"
+
+#include <boost/bind.hpp>
+
+namespace simgear
+{
+namespace canvas
+{
+
+  /**
+   * Canvas factory
+   */
+  CanvasPtr canvasFactory(SGPropertyNode* node)
+  {
+    return CanvasPtr(new Canvas(node));
+  }
+
+  //----------------------------------------------------------------------------
+  CanvasMgr::CanvasMgr( SGPropertyNode_ptr node,
+                        SystemAdapterPtr system_adapter ):
+    PropertyBasedMgr(node, "texture", &canvasFactory),
+    _system_adapter(system_adapter)
+  {
+
+  }
+
+  //----------------------------------------------------------------------------
+  CanvasPtr CanvasMgr::createCanvas(const std::string& name)
+  {
+    return boost::static_pointer_cast<Canvas>( createElement(name) );
+  }
+
+  //----------------------------------------------------------------------------
+  CanvasPtr CanvasMgr::getCanvas(size_t index) const
+  {
+    return boost::static_pointer_cast<Canvas>( getElement(index) );
+  }
+
+  //----------------------------------------------------------------------------
+  CanvasPtr CanvasMgr::getCanvas(const std::string& name) const
+  {
+    return boost::static_pointer_cast<Canvas>( getElement(name) );
+  }
+
+  //----------------------------------------------------------------------------
+  void CanvasMgr::elementCreated(PropertyBasedElementPtr element)
+  {
+    CanvasPtr canvas = boost::static_pointer_cast<Canvas>(element);
+    canvas->setSystemAdapter(_system_adapter);
+    canvas->setCanvasMgr(this);
+  }
+
+} // namespace canvas
+} // namespace simgear

simgear/canvas/CanvasMgr.hxx

@@ -0,0 +1,76 @@
+// Canvas with 2D rendering API
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#ifndef SG_CANVAS_MGR_H_
+#define SG_CANVAS_MGR_H_
+
+#include "canvas_fwd.hxx"
+#include <simgear/props/PropertyBasedMgr.hxx>
+
+namespace simgear
+{
+namespace canvas
+{
+
+  class CanvasMgr:
+    public PropertyBasedMgr
+  {
+    public:
+
+      /**
+       * @param node            Root node of branch used to control canvasses
+       * @param system_adapter  Adapter for connecting between canvas and
+       *                        application framework
+       *
+       */
+      CanvasMgr( SGPropertyNode_ptr node,
+                 SystemAdapterPtr system_adapter );
+
+      /**
+       * Create a new canvas
+       *
+       * @param name    Name of the new canvas
+       */
+      CanvasPtr createCanvas(const std::string& name = "");
+
+      /**
+       * Get ::Canvas by index
+       *
+       * @param index Index of texture node in /canvas/by-index/
+       */
+      CanvasPtr getCanvas(size_t index) const;
+
+      /**
+       * Get ::Canvas by name
+       *
+       * @param name Value of child node "name" in
+       *             /canvas/by-index/texture[i]/name
+       */
+      CanvasPtr getCanvas(const std::string& name) const;
+
+    protected:
+
+      SystemAdapterPtr _system_adapter;
+
+      virtual void elementCreated(PropertyBasedElementPtr element);
+  };
+
+} // namespace canvas
+} // namespace simgear
+
+#endif /* SG_CANVAS_MGR_H_ */

simgear/canvas/CanvasPlacement.cxx

@@ -0,0 +1,59 @@
+// Base class for canvas placements
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#include "CanvasPlacement.hxx"
+#include <simgear/props/props.hxx>
+
+namespace simgear
+{
+namespace canvas
+{
+
+  //----------------------------------------------------------------------------
+  Placement::Placement(SGPropertyNode* node):
+    _node(node)
+  {
+
+  }
+
+  //----------------------------------------------------------------------------
+  Placement::~Placement()
+  {
+
+  }
+
+  //----------------------------------------------------------------------------
+  SGConstPropertyNode_ptr Placement::getProps() const
+  {
+    return _node;
+  }
+
+  //----------------------------------------------------------------------------
+  SGPropertyNode_ptr Placement::getProps()
+  {
+    return _node;
+  }
+
+  //----------------------------------------------------------------------------
+  bool Placement::childChanged(SGPropertyNode* child)
+  {
+    return false;
+  }
+
+} // namespace canvas
+} // namespace simgear

simgear/canvas/CanvasPlacement.hxx

@@ -0,0 +1,51 @@
+// Base class for canvas placements
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#ifndef CANVAS_PLACEMENT_HXX_
+#define CANVAS_PLACEMENT_HXX_
+
+#include <simgear/props/propsfwd.hxx>
+
+namespace simgear
+{
+namespace canvas
+{
+
+  class Placement
+  {
+    public:
+      Placement(SGPropertyNode* node);
+      virtual ~Placement() = 0;
+
+      SGConstPropertyNode_ptr getProps() const;
+      SGPropertyNode_ptr getProps();
+
+      virtual bool childChanged(SGPropertyNode* child);
+
+    protected:
+      SGPropertyNode_ptr _node;
+
+    private:
+      Placement(const Placement&) /* = delete */;
+      Placement& operator=(const Placement&) /* = delete */;
+  };
+
+} // namespace canvas
+} // namespace simgear
+
+#endif /* CANVAS_PLACEMENT_HXX_ */

simgear/canvas/CanvasSystemAdapter.hxx

@@ -0,0 +1,67 @@
+// Adapter for using the canvas with different applications
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#ifndef SG_CANVAS_SYSTEM_ADAPTER_HXX_
+#define SG_CANVAS_SYSTEM_ADAPTER_HXX_
+
+#include "canvas_fwd.hxx"
+#include <simgear/nasal/nasal.h>
+
+namespace simgear
+{
+namespace canvas
+{
+
+  class SystemAdapter
+  {
+    public:
+
+      virtual ~SystemAdapter() {}
+      virtual FontPtr getFont(const std::string& name) const = 0;
+      virtual void addCamera(osg::Camera* camera) const = 0;
+      virtual void removeCamera(osg::Camera* camera) const = 0;
+      virtual osg::Image* getImage(const std::string& path) const = 0;
+
+      virtual naContext getNasalContext() const = 0;
+
+      /**
+       * Save passed reference to Nasal object from being deleted by the
+       * garbage collector.
+       */
+      virtual int gcSave(naRef r) = 0;
+
+      /**
+       * Release an object previously passed to ::gcSave to allow it being
+       * cleaned up by the garbage collector.
+       */
+      virtual void gcRelease(int key) = 0;
+
+      /**
+       * Call a Nasal function with the given environment and arguments.
+       */
+      virtual naRef callMethod( naRef code,
+                                naRef self,
+                                int argc,
+                                naRef* args,
+                                naRef locals ) = 0;
+  };
+
+} // namespace canvas
+} // namespace simgear
+
+#endif /* SG_CANVAS_SYSTEM_ADAPTER_HXX_ */

simgear/canvas/MouseEvent.hxx

@@ -0,0 +1,68 @@
+// Mouse event
+//
+// Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#ifndef CANVAS_MOUSE_EVENT_HXX_
+#define CANVAS_MOUSE_EVENT_HXX_
+
+#include "CanvasEvent.hxx"
+#include <osgGA/GUIEventAdapter>
+
+namespace simgear
+{
+namespace canvas
+{
+
+  class MouseEvent:
+    public Event
+  {
+    public:
+      MouseEvent():
+        button(-1),
+        state(-1),
+        mod(-1),
+        click_count(0)
+      {}
+
+      osg::Vec2f getScreenPos() const { return screen_pos; }
+      osg::Vec2f getClientPos() const { return client_pos; }
+      osg::Vec2f getDelta() const { return delta; }
+
+      float getScreenX() const { return screen_pos.x(); }
+      float getScreenY() const { return screen_pos.y(); }
+
+      float getClientX() const { return client_pos.x(); }
+      float getClientY() const { return client_pos.y(); }
+
+      float getDeltaX() const { return delta.x(); }
+      float getDeltaY() const { return delta.y(); }
+
+      int getCurrentClickCount() const { return click_count; }
+
+      osg::Vec2f  screen_pos,   //<! Position in screen coordinates
+                  client_pos,   //<! Position in window/canvas coordinates
+                  delta;
+      int         button,       //<! Button for this event
+                  state,        //<! Current button state
+                  mod,          //<! Keyboard modifier state
+                  click_count;  //<! Current click count
+  };
+
+} // namespace canvas
+} // namespace simgear
+
+#endif /* CANVAS_MOUSE_EVENT_HXX_ */

simgear/canvas/ODGauge.cxx

@@ -0,0 +1,306 @@
+// Owner Drawn Gauge helper class
+//
+// Written by Harald JOHNSEN, started May 2005.
+//
+// Copyright (C) 2005  Harald JOHNSEN
+//
+// Ported to OSG by Tim Moore - Jun 2007
+//
+// Heavily modified to be usable for the 2d Canvas by Thomas Geymayer - April 2012
+// Supports now multisampling/mipmapping, usage of the stencil buffer and placing
+// the texture in the scene by certain filter criteria
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Library General Public
+// License as published by the Free Software Foundation; either
+// version 2 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Library General Public License for more details.
+//
+// You should have received a copy of the GNU Library General Public
+// License along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+#ifdef HAVE_CONFIG_H
+#  include <simgear_config.h>
+#endif
+
+#include "ODGauge.hxx"
+#include "CanvasSystemAdapter.hxx"
+
+#include <simgear/debug/logstream.hxx>
+#include <simgear/scene/util/RenderConstants.hxx>
+
+#include <osg/Texture2D>
+#include <osg/AlphaFunc>
+#include <osg/BlendFunc>
+#include <osg/Camera>
+#include <osg/Matrix>
+#include <osg/PolygonMode>
+#include <osg/ShadeModel>
+#include <osg/StateSet>
+#include <osg/FrameBufferObject> // for GL_DEPTH_STENCIL_EXT on Windows
+
+#include <cassert>
+
+namespace simgear
+{
+namespace canvas
+{
+
+  //----------------------------------------------------------------------------
+  ODGauge::ODGauge():
+    _size_x( -1 ),
+    _size_y( -1 ),
+    _view_width( -1 ),
+    _view_height( -1 ),
+    _use_image_coords( false ),
+    _use_stencil( false ),
+    _use_mipmapping( false ),
+    _coverage_samples( 0 ),
+    _color_samples( 0 ),
+    rtAvailable( false )
+  {
+
+  }
+
+  //----------------------------------------------------------------------------
+  ODGauge::~ODGauge()
+  {
+    clear();
+  }
+
+  //----------------------------------------------------------------------------
+  void ODGauge::setSystemAdapter(const SystemAdapterPtr& system_adapter)
+  {
+    _system_adapter = system_adapter;
+  }
+
+  //----------------------------------------------------------------------------
+  void ODGauge::setSize(int size_x, int size_y)
+  {
+    _size_x = size_x;
+    _size_y = size_y < 0 ? size_x : size_y;
+
+    if( serviceable() )
+      reinit();
+    else if( texture )
+      texture->setTextureSize(_size_x, _size_y);
+  }
+
+  //----------------------------------------------------------------------------
+  void ODGauge::setViewSize(int width, int height)
+  {
+    _view_width = width;
+    _view_height = height < 0 ? width : height;
+
+    if( camera )
+      updateCoordinateFrame();
+  }
+
+  //----------------------------------------------------------------------------
+  void ODGauge::useImageCoords(bool use)
+  {
+    if( use == _use_image_coords )
+      return;
+
+    _use_image_coords = use;
+
+    if( texture )
+      updateCoordinateFrame();
+  }
+
+  //----------------------------------------------------------------------------
+  void ODGauge::useStencil(bool use)
+  {
+    if( use == _use_stencil )
+      return;
+
+    _use_stencil = use;
+
+    if( texture )
+      updateStencil();
+  }
+
+  //----------------------------------------------------------------------------
+  void ODGauge::setSampling( bool mipmapping,
+                               int coverage_samples,
+                               int color_samples )
+  {
+    if(    _use_mipmapping == mipmapping
+        && _coverage_samples == coverage_samples
+        && _color_samples == color_samples )
+      return;
+
+    _use_mipmapping = mipmapping;
+
+    if( color_samples > coverage_samples )
+    {
+      SG_LOG
+      (
+        SG_GL,
+        SG_WARN,
+        "ODGauge::setSampling: color_samples > coverage_samples not allowed!"
+      );
+      color_samples = coverage_samples;
+    }
+
+    _coverage_samples = coverage_samples;
+    _color_samples = color_samples;
+
+    updateSampling();
+  }
+
+  //----------------------------------------------------------------------------
+  void ODGauge::setRender(bool render)
+  {
+    // Only the far camera should trigger this texture to be rendered.
+    camera->setNodeMask(render ? simgear::BACKGROUND_BIT : 0);
+  }
+
+  //----------------------------------------------------------------------------
+  bool ODGauge::serviceable(void)
+  {
+    return rtAvailable;
+  }
+
+  //----------------------------------------------------------------------------
+  void ODGauge::allocRT(osg::NodeCallback* camera_cull_callback)
+  {
+    camera = new osg::Camera;
+    camera->setDataVariance(osg::Object::DYNAMIC);
+    camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
+    camera->setRenderOrder(osg::Camera::PRE_RENDER);
+    camera->setClearColor(osg::Vec4(0.0f, 0.0f, 0.0f , 0.0f));
+    camera->setClearStencil(0);
+    camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT,
+                                               osg::Camera::FRAME_BUFFER );
+
+    if( camera_cull_callback )
+      camera->setCullCallback(camera_cull_callback);
+
+    setRender(true);
+    updateCoordinateFrame();
+    updateStencil();
+
+    osg::StateSet* stateSet = camera->getOrCreateStateSet();
+    stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
+    stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
+    stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
+    stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
+    stateSet->setAttributeAndModes(
+      new osg::PolygonMode( osg::PolygonMode::FRONT_AND_BACK,
+                            osg::PolygonMode::FILL ),
+      osg::StateAttribute::ON );
+    stateSet->setAttributeAndModes(
+      new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.0f),
+      osg::StateAttribute::ON );
+    stateSet->setAttribute(new osg::ShadeModel(osg::ShadeModel::FLAT));
+    stateSet->setAttributeAndModes(
+      new osg::BlendFunc( osg::BlendFunc::SRC_ALPHA,
+                          osg::BlendFunc::ONE_MINUS_SRC_ALPHA),
+      osg::StateAttribute::ON );
+    if( !texture )
+    {
+      texture = new osg::Texture2D;
+      texture->setTextureSize(_size_x, _size_y);
+      texture->setInternalFormat(GL_RGBA);
+    }
+
+    updateSampling();
+
+    if( _system_adapter )
+      _system_adapter->addCamera(camera.get());
+
+    rtAvailable = true;
+  }
+
+  //----------------------------------------------------------------------------
+  void ODGauge::reinit()
+  {
+    osg::NodeCallback* cull_callback = camera ? camera->getCullCallback() : 0;
+    clear();
+    allocRT(cull_callback);
+  }
+
+  //----------------------------------------------------------------------------
+  void ODGauge::clear()
+  {
+    if( camera.valid() && _system_adapter )
+      _system_adapter->removeCamera(camera.get());
+    camera.release();
+    texture.release();
+
+    rtAvailable = false;
+  }
+
+  //----------------------------------------------------------------------------
+  void ODGauge::updateCoordinateFrame()
+  {
+    assert( camera );
+
+    if( _view_width < 0 )
+      _view_width = _size_x;
+    if( _view_height < 0 )
+      _view_height = _size_y;
+
+    camera->setViewport(0, 0, _size_x, _size_y);
+
+    if( _use_image_coords )
+      camera->setProjectionMatrix(
+        osg::Matrix::ortho2D(0, _view_width, _view_height, 0)
+      );
+    else
+      camera->setProjectionMatrix(
+        osg::Matrix::ortho2D( -_view_width/2.,  _view_width/2.,
+                              -_view_height/2., _view_height/2. )
+      );
+  }
+
+  //----------------------------------------------------------------------------
+  void ODGauge::updateStencil()
+  {
+    assert( camera );
+
+    GLbitfield mask = GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT;
+
+    if( _use_stencil)
+    {
+      camera->attach( osg::Camera::PACKED_DEPTH_STENCIL_BUFFER,
+                       GL_DEPTH_STENCIL_EXT );
+      mask |= GL_STENCIL_BUFFER_BIT;
+    }
+    else
+    {
+      camera->detach(osg::Camera::PACKED_DEPTH_STENCIL_BUFFER);
+    }
+
+    camera->setClearMask(mask);
+  }
+
+  //----------------------------------------------------------------------------
+  void ODGauge::updateSampling()
+  {
+    assert( camera );
+    assert( texture );
+
+    texture->setFilter(
+      osg::Texture2D::MIN_FILTER,
+      _use_mipmapping ? osg::Texture2D::LINEAR_MIPMAP_LINEAR
+                      : osg::Texture2D::LINEAR
+    );
+    camera->attach(
+      osg::Camera::COLOR_BUFFER,
+      texture.get(),
+      0, 0,
+      _use_mipmapping,
+      _coverage_samples,
+      _color_samples
+    );
+  }
+
+} // namespace canvas
+} // namespace simgear