1 // fgviewer.cxx -- alternative flightgear viewer application
3 // Copyright (C) 2009 - 2011 Mathias Froehlich
5 // This program is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU General Public License as
7 // published by the Free Software Foundation; either version 2 of the
8 // License, or (at your option) any later version.
10 // This program is distributed in the hope that it will be useful, but
11 // WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // General Public License for more details.
15 // You should have received a copy of the GNU General Public License
16 // along with this program; if not, write to the Free Software
17 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
26 #include <osg/ArgumentParser>
28 #include <osgDB/ReadFile>
29 #include <osgViewer/Viewer>
30 #include <osgViewer/ViewerEventHandlers>
31 #include <osgViewer/Renderer>
32 #include <osgGA/KeySwitchMatrixManipulator>
33 #include <osgGA/StateSetManipulator>
34 #include <osgGA/TrackballManipulator>
35 #include <osgGA/FlightManipulator>
36 #include <osgGA/DriveManipulator>
37 #include <osgGA/TerrainManipulator>
39 #include <simgear/props/props.hxx>
40 #include <simgear/props/props_io.hxx>
41 #include <simgear/misc/sg_path.hxx>
42 #include <simgear/scene/material/EffectCullVisitor.hxx>
43 #include <simgear/scene/material/matlib.hxx>
44 #include <simgear/scene/util/SGReaderWriterOptions.hxx>
45 #include <simgear/scene/util/SGSceneFeatures.hxx>
46 #include <simgear/scene/util/SGUpdateVisitor.hxx>
47 #include <simgear/scene/tgdb/userdata.hxx>
48 #include <simgear/scene/model/ModelRegistry.hxx>
49 #include <simgear/scene/model/modellib.hxx>
52 main(int argc, char** argv)
54 // use an ArgumentParser object to manage the program arguments.
55 osg::ArgumentParser arguments(&argc, argv);
58 if (arguments.read("--fg-root", fg_root)) {
59 } else if (const char *fg_root_env = std::getenv("FG_ROOT")) {
60 fg_root = fg_root_env;
65 std::string fg_scenery;
66 if (arguments.read("--fg-scenery", fg_scenery)) {
67 } else if (const char *fg_scenery_env = std::getenv("FG_SCENERY")) {
68 fg_scenery = fg_scenery_env;
71 path.append("Scenery");
72 fg_scenery = path.str();
75 SGSharedPtr<SGPropertyNode> props = new SGPropertyNode;
77 SGPath preferencesFile = fg_root;
78 preferencesFile.append("preferences.xml");
79 readProperties(preferencesFile.str(), props);
81 // In case of an error, at least make summer :)
82 props->getNode("sim/startup/season", true)->setStringValue("summer");
84 std::cerr << "Problems loading FlightGear preferences.\n"
85 << "Probably FG_ROOT is not properly set." << std::endl;
89 while (arguments.read("--config", config)) {
91 readProperties(config, props);
93 std::cerr << "Problems loading config file \"" << config
94 << "\" given on the command line." << std::endl;
98 std::string prop, value;
99 while (arguments.read("--prop", prop, value)) {
100 props->setStringValue(prop, value);
103 // Just reference simgears reader writer stuff so that the globals get
104 // pulled in by the linker ...
105 // FIXME: make that more explicit clear and call an initialization function
106 simgear::ModelRegistry::instance();
108 // construct the viewer.
109 osgViewer::Viewer viewer(arguments);
111 // set up the camera manipulators.
112 osgGA::KeySwitchMatrixManipulator* keyswitchManipulator;
113 keyswitchManipulator = new osgGA::KeySwitchMatrixManipulator;
115 keyswitchManipulator->addMatrixManipulator('1', "Trackball",
116 new osgGA::TrackballManipulator);
117 keyswitchManipulator->addMatrixManipulator('2', "Flight",
118 new osgGA::FlightManipulator);
119 keyswitchManipulator->addMatrixManipulator('3', "Drive",
120 new osgGA::DriveManipulator);
121 keyswitchManipulator->addMatrixManipulator('4', "Terrain",
122 new osgGA::TerrainManipulator);
124 viewer.setCameraManipulator(keyswitchManipulator);
127 viewer.addEventHandler(new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()));
128 viewer.addEventHandler(new osgViewer::HelpHandler);
129 viewer.addEventHandler(new osgViewer::StatsHandler);
130 viewer.addEventHandler(new osgViewer::ThreadingHandler);
131 viewer.addEventHandler(new osgViewer::LODScaleHandler);
132 viewer.addEventHandler(new osgViewer::ScreenCaptureHandler);
133 viewer.addEventHandler(new osgViewer::WindowSizeHandler);
135 // Sigh, we need our own cull visitor ...
136 osg::Camera* camera = viewer.getCamera();
137 osgViewer::Renderer* renderer = static_cast<osgViewer::Renderer*>(camera->getRenderer());
138 for (int j = 0; j < 2; ++j) {
139 osgUtil::SceneView* sceneView = renderer->getSceneView(j);
140 sceneView->setCullVisitor(new simgear::EffectCullVisitor);
142 // Shaders expect valid fog
143 osg::Fog* fog = new osg::Fog;
144 fog->setMode(osg::Fog::EXP2);
145 fog->setColor(osg::Vec4(1, 1, 1, 1));
146 fog->setDensity(1e-6);
147 camera->getOrCreateStateSet()->setAttribute(fog);
149 sgUserDataInit(props.get());
150 SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::DoNotUseCompression);
151 SGMaterialLib* ml = new SGMaterialLib;
152 SGPath mpath(fg_root);
153 mpath.append("materials.xml");
155 ml->load(fg_root, mpath.str(), props);
157 std::cerr << "Problems loading FlightGear materials.\n"
158 << "Probably FG_ROOT is not properly set." << std::endl;
160 simgear::SGModelLib::init(fg_root, props);
162 // Set up the reader/writer options
163 osg::ref_ptr<simgear::SGReaderWriterOptions> options;
164 if (osgDB::Options* ropt = osgDB::Registry::instance()->getOptions())
165 options = new simgear::SGReaderWriterOptions(*ropt);
167 options = new simgear::SGReaderWriterOptions;
168 osgDB::convertStringPathIntoFilePathList(fg_scenery,
169 options->getDatabasePathList());
170 options->setMaterialLib(ml);
171 options->setPropertyNode(props);
172 options->setPluginStringData("SimGear::FG_ROOT", fg_root);
173 // We have some problems here, rethink them at some time
174 options->setPluginStringData("SimGear::PARTICLESYSTEM", "OFF");
175 // Omit building bounding volume trees, as the viewer will not run a simulation
176 options->setPluginStringData("SimGear::BOUNDINGVOLUMES", "OFF");
178 // Here, all arguments are processed
179 arguments.reportRemainingOptionsAsUnrecognized();
180 arguments.writeErrorMessages(std::cerr);
182 osg::ref_ptr<osg::Node> loadedModel;
183 if (arguments.argc() != 1) {
184 // read the scene from the list of file specified command line args.
185 loadedModel = osgDB::readNodeFiles(arguments, options.get());
187 // if no arguments given resort to the whole world scenery
188 options->setPluginStringData("SimGear::FG_EARTH", "ON");
189 loadedModel = osgDB::readNodeFile("w180s90-360x180.spt", options.get());
192 // if no model has been successfully loaded report failure.
193 if (!loadedModel.valid()) {
194 std::cerr << arguments.getApplicationName()
195 << ": No data loaded" << std::endl;
199 // pass the loaded scene graph to the viewer.
200 viewer.setSceneData(loadedModel.get());
202 // We want on demand database paging
203 viewer.setDatabasePager(new osgDB::DatabasePager);
204 viewer.getDatabasePager()->setUpThreads(1, 1);