Initial support for glTF models

3rdparty/CMakeLists.txt

@@ -5,3 +5,5 @@ endif()
 if (NOT SYSTEM_UDNS)
 	add_subdirectory(udns)
 endif()
+
+add_subdirectory(tiny_gltf)

3rdparty/tiny_gltf/CMakeLists.txt

@@ -0,0 +1,16 @@
+add_library(FGTinyGLTF INTERFACE)
+
+target_include_directories(FGTinyGLTF
+  INTERFACE
+  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+  $<INSTALL_INTERFACE:include>)
+
+set_target_properties(FGTinyGLTF PROPERTIES LINKER_LANGUAGE CXX)
+
+# in the non-shared case, we need to export these as well
+if (NOT SIMGEAR_SHARED)
+  install(TARGETS FGTinyGLTF
+    EXPORT SimGearTargets
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+endif()