first commit
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@@ -0,0 +1,6 @@
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#add_executable(terrasync terrasync.cxx)
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#target_link_libraries(terrasync SimGearCore)
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#install(TARGETS terrasync RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
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@@ -0,0 +1,65 @@
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TerraSync
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=========
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Usage:
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terrasync -p <port> [ -R ] [ -s <rsync_source> ] -d <dest>
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terrasync -p <port> -S [ -s <svn_source> ] -d <dest>
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Example:
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$ fgfs --atlas=socket,out,1,localhost,5500,udp --fg-scenery=/usr/local/FlightGear/data/scenery:/data1/Scenery-0.9.2
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$ nice terrasync -p 5500 -d /data1/Scenery-0.9.2
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Requirements:
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- rsync util installed in your path.
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or - svn util installed in your path
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NOTE!!!! Do not run terrasync against the default
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$FG_ROOT/data/Scenery/ directory. I recommend creating a separate
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scenery directory and specifying both in your ~/.fgfsrc file or via
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the command line.
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TerraSync is a utility that is intended to run as a light weight
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background process. It's purpose is to monitor the position of a
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FlightGear flight and pre-fetch scenery tiles from a remote server
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based on the current FlightGear position.
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This allows you to do a base install of FlightGear with no add on
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scenery. Now just go and fly anywhere. Scenery is fetched "just in
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time" and accumulated on your HD so it is already there next time you
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fly. You can fly anywhere and essentially just the scenery you need
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is auto-installed as you fly.
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Terrasync runs as a separate process and expects the --atlas=port
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format to be sent from fgfs. The fgfs output tells the terrasync util
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where FlightGear is currently flying. Terrasync will then issue the
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appropriate commands to rsync the surrounding areas to your local
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scenery directory. The user need to choose a port for
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FlightGear->TerraSync communication and then specify the server
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location and destation scenery tree.
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As you fly, terrasync will periodically refresh and pull any new
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scenery tiles that you need for your position from the server.
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This also works if the scenery on the scenery server is updated.
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Rsync ( or svn ) will pull any missing files, or any newly updated files.
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There is a chicken/egg problem when you first start up in a brand new
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area. FlightGear is expecting the scenery to be there *now* but it
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may not have been fetched yet. I suppose without making a more
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complex protocol, the user will need to be aware of this. For now I
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suggest exiting FlightGear after terrasync gets caught up, and
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restarting FlightGear. The second time FlightGear starts up
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everything should be good.
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Final notes:
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I have set up the scenery server at
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scenery.flightgear.org::Scenery-0.9.2. This is the latest 0.9.2 build
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of the world.
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Note to self:
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nice ./terrasync -p 5500 -s baron.flightgear.org:/stage/fgfs05/curt/Scenery-1.0 -d /stage/catalina3/Scenery-1.0/
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@@ -0,0 +1,515 @@
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// terrasync.cxx -- "JIT" scenery fetcher
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//
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// Written by Curtis Olson, started November 2002.
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//
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// Copyright (C) 2002 Curtis L. Olson - http://www.flightgear.org/~curt
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// Copyright (C) 2008 Alexander R. Perry <alex.perry@ieee.org>
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// Copyright (C) 2011 Thorsten Brehm <brehmt@gmail.com>
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// $Id$
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <simgear/simgear_config.h>
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#ifdef HAVE_WINDOWS_H
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#include <windows.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include "unistd.h"
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#endif
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#ifdef __MINGW32__
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# include <time.h>
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#elif defined(_MSC_VER)
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# include <io.h>
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#endif
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#include <stdlib.h> // atoi() atof() abs() system()
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#include <signal.h> // signal()
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#include <simgear/compiler.h>
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#include <iostream>
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#include <fstream>
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#include <string>
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#include <simgear/io/raw_socket.hxx>
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#include <simgear/scene/tsync/terrasync.hxx>
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#if defined(_MSC_VER) || defined(__MINGW32__)
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typedef void (__cdecl * sighandler_t)(int);
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#elif defined( __APPLE__ ) || defined (__FreeBSD__)
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typedef sig_t sighandler_t;
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#endif
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int termination_triggering_signals[] = {
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#if defined(_MSC_VER) || defined(__MINGW32__)
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SIGINT, SIGILL, SIGFPE, SIGSEGV, SIGTERM, SIGBREAK, SIGABRT,
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#else
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SIGHUP, SIGINT, SIGQUIT, SIGKILL, SIGTERM,
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#endif
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0}; // zero terminated
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using namespace std;
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const char* svn_base =
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"http://terrascenery.googlecode.com/svn/trunk/data/Scenery";
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const char* rsync_base = "scenery.flightgear.org::Scenery";
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bool terminating = false;
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sighandler_t prior_signal_handlers[32];
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simgear::Socket theSocket;
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simgear::SGTerraSync* pTerraSync = NULL;
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/** display usage information */
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static void
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usage( const string& prog ) {
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cout << "Usage: terrasync [options]\n"
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"Options:\n"
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" -d <dest> destination directory [required]\n"
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" -R transport using pipe to rsync\n"
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" -S transport using built-in svn\n"
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" -e transport using external svn client\n"
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" -p <port> listen on UDP port [default: 5501]\n"
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" -s <source> source base [default: '']\n"
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#ifndef _MSC_VER
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" -pid <pidfile> write PID to file\n"
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#endif
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" -v be more verbose\n";
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#ifndef _MSC_VER
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cout << "\n"
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"Example:\n"
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" pid=$(cat $pidfile 2>/dev/null)\n"
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" if test -n \"$pid\" && kill -0 $pid ; then\n"
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" echo \"terrasync already running: $pid\"\n"
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" else\n"
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" nice /games/sport/fgs/utils/TerraSync/terrasync \\\n"
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" -v -pid $pidfile -S -p 5500 -d /games/orig/terrasync &\n"
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" fi\n";
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#endif
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}
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/** Signal handler for termination requests (Ctrl-C) */
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void
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terminate_request_handler(int param)
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{
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char msg[] = "\nReceived signal XX, intend to exit soon.\n"
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"Repeat the signal to force immediate termination.\n";
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msg[17] = '0' + param / 10;
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msg[18] = '0' + param % 10;
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if (write(1, msg, sizeof(msg) - 1) == -1)
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{
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// need to act write's return value to avoid GCC compiler warning
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// "'write' declared with attribute warn_unused_result"
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terminating = true; // dummy operation
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}
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terminating = true;
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signal(param, prior_signal_handlers[param]);
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theSocket.close();
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if (pTerraSync)
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pTerraSync->unbind();
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}
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/** Parse command-line options. */
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void
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parseOptions(int argc, char** argv, SGPropertyNode_ptr config,
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bool& testing, int& verbose, int& port, const char* &pidfn)
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{
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// parse arguments
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for (int i=1; i < argc; ++i )
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{
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string arg = argv[i];
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if ( arg == "-p" ) {
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++i;
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port = atoi( argv[i] );
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} else if ( arg.find("-pid") == 0 ) {
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++i;
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pidfn = argv[i];
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cout << "pidfn: " << pidfn << endl;
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} else if ( arg == "-s" ) {
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++i;
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config->setStringValue("svn-server", argv[i]);
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} else if ( arg == "-d" ) {
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++i;
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config->setStringValue("scenery-dir", argv[i]);
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} else if ( arg == "-R" ) {
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config->setBoolValue("use-svn", false);
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} else if ( arg == "-S" ) {
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config->setBoolValue("use-built-in-svn", true);
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} else if ( arg == "-e" ) {
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config->setBoolValue("use-built-in-svn", false);
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} else if ( arg == "-v" ) {
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verbose++;
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} else if ( arg == "-T" ) {
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testing = true;
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} else if ( arg == "-h" ) {
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usage( argv[0] );
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exit(0);
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} else {
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cerr << "Unrecognized command-line option '" << arg << "'" << endl;
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usage( argv[0] );
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exit(-1);
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}
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}
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}
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/** parse a single NMEA-0183 position message */
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static void
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parse_message( int verbose, const string &msg, int *lat, int *lon )
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{
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double dlat, dlon;
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string text = msg;
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if (verbose>=3)
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cout << "message: '" << text << "'" << endl;
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// find GGA string and advance to start of lat (see NMEA-0183 for protocol specs)
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string::size_type pos = text.find( "$GPGGA" );
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if ( pos == string::npos )
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{
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*lat = simgear::NOWHERE;
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*lon = simgear::NOWHERE;
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return;
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}
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string tmp = text.substr( pos + 7 );
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pos = tmp.find( "," );
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tmp = tmp.substr( pos + 1 );
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// cout << "-> " << tmp << endl;
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// find lat then advance to start of hemisphere
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pos = tmp.find( "," );
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string lats = tmp.substr( 0, pos );
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dlat = atof( lats.c_str() ) / 100.0;
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tmp = tmp.substr( pos + 1 );
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// find N/S hemisphere and advance to start of lon
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if ( tmp.substr( 0, 1 ) == "S" ) {
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dlat = -dlat;
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}
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pos = tmp.find( "," );
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tmp = tmp.substr( pos + 1 );
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// find lon
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pos = tmp.find( "," );
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string lons = tmp.substr( 0, pos );
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dlon = atof( lons.c_str() ) / 100.0;
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tmp = tmp.substr( pos + 1 );
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// find E/W hemisphere and advance to start of lon
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if ( tmp.substr( 0, 1 ) == "W" ) {
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dlon = -dlon;
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}
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if ( dlat < 0 ) {
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*lat = (int)dlat - 1;
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} else {
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*lat = (int)dlat;
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}
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if ( dlon < 0 ) {
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*lon = (int)dlon - 1;
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} else {
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*lon = (int)dlon;
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}
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if ((dlon == 0) && (dlat == 0)) {
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*lon = simgear::NOWHERE;
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*lat = simgear::NOWHERE;
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}
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}
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void
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syncArea( int lat, int lon )
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{
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if ( lat < -90 || lat > 90 || lon < -180 || lon > 180 )
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return;
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char NS, EW;
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int baselat, baselon;
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if ( lat < 0 ) {
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int base = (int)(lat / 10);
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if ( lat == base * 10 ) {
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baselat = base * 10;
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} else {
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baselat = (base - 1) * 10;
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}
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NS = 's';
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} else {
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baselat = (int)(lat / 10) * 10;
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NS = 'n';
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}
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if ( lon < 0 ) {
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int base = (int)(lon / 10);
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if ( lon == base * 10 ) {
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baselon = base * 10;
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} else {
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baselon = (base - 1) * 10;
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}
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EW = 'w';
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} else {
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baselon = (int)(lon / 10) * 10;
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EW = 'e';
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}
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ostringstream dir;
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dir << setfill('0')
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<< EW << setw(3) << abs(baselon) << NS << setw(2) << abs(baselat) << "/"
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<< EW << setw(3) << abs(lon) << NS << setw(2) << abs(lat);
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pTerraSync->syncAreaByPath(dir.str());
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}
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void
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syncAreas( int lat, int lon, int lat_dir, int lon_dir )
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{
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if ( lat_dir == 0 && lon_dir == 0 ) {
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// do surrounding 8 1x1 degree areas.
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for ( int i = lat - 1; i <= lat + 1; ++i ) {
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for ( int j = lon - 1; j <= lon + 1; ++j ) {
|
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if ( i != lat || j != lon ) {
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syncArea( i, j );
|
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}
|
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}
|
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}
|
||||
} else {
|
||||
if ( lat_dir != 0 ) {
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syncArea( lat + lat_dir, lon - 1 );
|
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syncArea( lat + lat_dir, lon + 1 );
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syncArea( lat + lat_dir, lon );
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}
|
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if ( lon_dir != 0 ) {
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syncArea( lat - 1, lon + lon_dir );
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syncArea( lat + 1, lon + lon_dir );
|
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syncArea( lat, lon + lon_dir );
|
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}
|
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}
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||||
|
||||
// do current 1x1 degree area first
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syncArea( lat, lon );
|
||||
}
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||||
|
||||
bool
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schedulePosition(int lat, int lon)
|
||||
{
|
||||
bool Ok = false;
|
||||
if ((lat == simgear::NOWHERE) || (lon == simgear::NOWHERE)) {
|
||||
return Ok;
|
||||
}
|
||||
|
||||
static int last_lat = simgear::NOWHERE;
|
||||
static int last_lon = simgear::NOWHERE;
|
||||
if ((lat == last_lat) && (lon == last_lon)) {
|
||||
Ok = true;
|
||||
return Ok;
|
||||
}
|
||||
|
||||
int lat_dir=0;
|
||||
int lon_dir=0;
|
||||
|
||||
if ( last_lat != simgear::NOWHERE && last_lon != simgear::NOWHERE )
|
||||
{
|
||||
int dist = lat - last_lat;
|
||||
if ( dist != 0 )
|
||||
{
|
||||
lat_dir = dist / abs(dist);
|
||||
}
|
||||
else
|
||||
{
|
||||
lat_dir = 0;
|
||||
}
|
||||
dist = lon - last_lon;
|
||||
if ( dist != 0 )
|
||||
{
|
||||
lon_dir = dist / abs(dist);
|
||||
} else
|
||||
{
|
||||
lon_dir = 0;
|
||||
}
|
||||
}
|
||||
|
||||
cout << "Scenery update for " <<
|
||||
"lat = " << lat << ", lon = " << lon <<
|
||||
", lat_dir = " << lat_dir << ", " <<
|
||||
"lon_dir = " << lon_dir << endl;
|
||||
|
||||
syncAreas( lat, lon, lat_dir, lon_dir );
|
||||
Ok = true;
|
||||
|
||||
last_lat = lat;
|
||||
last_lon = lon;
|
||||
|
||||
return Ok;
|
||||
}
|
||||
|
||||
/** Monitor UDP socket and process NMEA position updates. */
|
||||
int
|
||||
processRequests(SGPropertyNode_ptr config, bool testing, int verbose, int port)
|
||||
{
|
||||
const char* host = "localhost";
|
||||
char msg[256];
|
||||
int len;
|
||||
int lat, lon;
|
||||
bool connected = false;
|
||||
|
||||
// Must call this before any other net stuff
|
||||
simgear::Socket::initSockets();
|
||||
|
||||
// open UDP socket
|
||||
if ( !theSocket.open( false ) )
|
||||
{
|
||||
cerr << "error opening socket" << endl;
|
||||
return -1;
|
||||
}
|
||||
|
||||
if ( theSocket.bind( host, port ) == -1 )
|
||||
{
|
||||
cerr << "error binding to port " << port << endl;
|
||||
return -1;
|
||||
}
|
||||
|
||||
theSocket.setBlocking(true);
|
||||
|
||||
while ( (!terminating)&&
|
||||
(!config->getBoolValue("stalled", false)) )
|
||||
{
|
||||
if (verbose >= 4)
|
||||
cout << "main loop" << endl;
|
||||
// main loop
|
||||
bool recv_msg = false;
|
||||
if ( testing )
|
||||
{
|
||||
// Testing without FGFS communication
|
||||
lat = 37;
|
||||
lon = -123;
|
||||
recv_msg = true;
|
||||
} else
|
||||
{
|
||||
if (verbose && pTerraSync->isIdle())
|
||||
{
|
||||
cout << "Idle; waiting for FlightGear position data" << endl;
|
||||
}
|
||||
len = theSocket.recv(msg, sizeof(msg)-1, 0);
|
||||
if (len >= 0)
|
||||
{
|
||||
msg[len] = '\0';
|
||||
recv_msg = true;
|
||||
if (verbose>=2)
|
||||
cout << "recv length: " << len << endl;
|
||||
parse_message( verbose, msg, &lat, &lon );
|
||||
if ((!connected)&&
|
||||
(lat != simgear::NOWHERE)&&
|
||||
(lon != simgear::NOWHERE))
|
||||
{
|
||||
cout << "Valid position data received. Connected successfully." << endl;
|
||||
connected = true;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if ( recv_msg )
|
||||
{
|
||||
schedulePosition(lat, lon);
|
||||
}
|
||||
|
||||
if ( testing )
|
||||
{
|
||||
if (pTerraSync->isIdle())
|
||||
terminating = true;
|
||||
else
|
||||
SGTimeStamp::sleepForMSec(1000);
|
||||
}
|
||||
} // while !terminating
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
int main( int argc, char **argv )
|
||||
{
|
||||
int port = 5501;
|
||||
int verbose = 0;
|
||||
int exit_code = 0;
|
||||
bool testing = false;
|
||||
const char* pidfn = "";
|
||||
|
||||
// default configuration
|
||||
sglog().setLogLevels( SG_ALL, SG_ALERT);
|
||||
SGPropertyNode_ptr root = new SGPropertyNode();
|
||||
SGPropertyNode_ptr config = root->getNode("/sim/terrasync", true);
|
||||
config->setStringValue("scenery-dir", "terrasyncdir");
|
||||
config->setStringValue("svn-server", svn_base);
|
||||
config->setStringValue("rsync-server", rsync_base);
|
||||
config->setBoolValue("use-built-in-svn", true);
|
||||
config->setBoolValue("use-svn", true);
|
||||
config->setBoolValue("enabled", true);
|
||||
config->setIntValue("max-errors", -1); // -1 = infinite
|
||||
|
||||
// parse command-line arguments
|
||||
parseOptions(argc, argv, config, testing, verbose, port, pidfn);
|
||||
|
||||
if (verbose)
|
||||
sglog().setLogLevels( SG_ALL, SG_INFO);
|
||||
|
||||
#ifndef _MSC_VER
|
||||
// create PID file
|
||||
if (*pidfn)
|
||||
{
|
||||
ofstream pidstream;
|
||||
pidstream.open(pidfn);
|
||||
if (!pidstream.good())
|
||||
{
|
||||
cerr << "Cannot open pid file '" << pidfn << "': ";
|
||||
perror(0);
|
||||
exit(2);
|
||||
}
|
||||
pidstream << getpid() << endl;
|
||||
pidstream.close();
|
||||
}
|
||||
#endif
|
||||
|
||||
// install signal handlers
|
||||
for (int* sigp=termination_triggering_signals; *sigp; sigp++)
|
||||
{
|
||||
prior_signal_handlers[*sigp] =
|
||||
signal(*sigp, *terminate_request_handler);
|
||||
if (verbose>=2)
|
||||
cout << "Intercepting signal " << *sigp << endl;
|
||||
}
|
||||
|
||||
{
|
||||
pTerraSync = new simgear::SGTerraSync;
|
||||
pTerraSync->setRoot(root);
|
||||
pTerraSync->bind();
|
||||
pTerraSync->init();
|
||||
|
||||
// now monitor and process position updates
|
||||
exit_code = processRequests(config, testing, verbose, port);
|
||||
|
||||
pTerraSync->unbind();
|
||||
delete pTerraSync;
|
||||
pTerraSync = NULL;
|
||||
}
|
||||
|
||||
return exit_code;
|
||||
}
|
||||
Reference in New Issue
Block a user