src/Main/fgviewer.cxx

   1 #include <iostream>
   2 #include <cstdlib>
   3
   4 #include <osg/ArgumentParser>
   5 #include <osg/Fog>
   6 #include <osgDB/ReadFile>
   7 #include <osgDB/Registry>
   8 #include <osgDB/WriteFile>
   9 #include <osgViewer/Renderer>
  10 #include <osgViewer/Viewer>
  11 #include <osgViewer/ViewerEventHandlers>
  12 #include <osgGA/KeySwitchMatrixManipulator>
  13 #include <osgGA/TrackballManipulator>
  14 #include <osgGA/FlightManipulator>
  15 #include <osgGA/DriveManipulator>
  16 #include <osgGA/TerrainManipulator>
  17 #include <osgGA/StateSetManipulator>
  18
  19 #include <simgear/props/props.hxx>
  20 #include <simgear/props/props_io.hxx>
  21 #include <simgear/misc/sg_path.hxx>
  22 #include <simgear/scene/material/EffectCullVisitor.hxx>
  23 #include <simgear/scene/material/matlib.hxx>
  24 #include <simgear/scene/tgdb/SGReaderWriterBTGOptions.hxx>
  25 #include <simgear/scene/tgdb/userdata.hxx>
  26 #include <simgear/scene/tgdb/TileEntry.hxx>
  27 #include <simgear/scene/model/ModelRegistry.hxx>
  28 #include <simgear/scene/model/modellib.hxx>
  29
  30 #include <Scenery/scenery.hxx>
  31
  32 #include "fg_init.hxx"
  33 #include "fg_props.hxx"
  34 #include "globals.hxx"
  35 #include "options.hxx"
  36
  37 class DummyLoadHelper : public simgear::ModelLoadHelper {
  38 public:
  39     virtual osg::Node *loadTileModel(const string& modelPath, bool)
  40     {
  41         try {
  42             SGSharedPtr<SGPropertyNode> prop = new SGPropertyNode;
  43             return simgear::SGModelLib::loadModel(modelPath,
  44                                                   globals->get_props());
  45         } catch (...) {
  46             std::cerr << "Error loading \"" << modelPath << "\"" << std::endl;
  47             return 0;
  48         }
  49     }
  50 };
  51
  52 class GraphDumpHandler : public  osgGA::GUIEventHandler
  53 {
  54 public:
  55     GraphDumpHandler() : _keyDump('d') {}
  56     void setKeyDump(int key) { _keyDump = key; }
  57     int getKeyDump() const { return _keyDump; }
  58     bool handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa);
  59
  60     /** Get the keyboard and mouse usage of this manipulator.*/
  61     virtual void getUsage(osg::ApplicationUsage& usage) const;
  62 protected:
  63     int _keyDump;
  64 };
  65
  66 static void dumpOut(osg::Node* node)
  67 {
  68     char filename[24];
  69     static int count = 1;
  70
  71     FGRenderer *renderer = globals->get_renderer();
  72
  73     while (count < 1000) {
  74         FILE *fp;
  75         snprintf(filename, 24, "fgviewer-%03d.osg", count++);
  76         if ( (fp = fopen(filename, "r")) == NULL )
  77             break;
  78         fclose(fp);
  79     }
  80
  81     if (osgDB::writeNodeFile(*node, filename))
  82         std::cerr << "Entire scene graph saved to \"" << filename << "\".\n";
  83     else
  84         std::cerr << "Failed to save to \"" << filename << "\".\n";
  85 }
  86
  87 bool GraphDumpHandler::handle(const osgGA::GUIEventAdapter& ea,
  88                               osgGA::GUIActionAdapter& aa)
  89 {
  90     osgViewer::View* view = dynamic_cast<osgViewer::View*>(&aa);
  91     if (!view)
  92         return false;
  93     if (ea.getHandled())
  94         return false;
  95     switch(ea.getEventType()) {
  96     case osgGA::GUIEventAdapter::KEYUP:
  97         if (ea.getKey() == _keyDump) {
  98             dumpOut(view->getScene()->getSceneData());
  99             return true;
 100         }
 101         break;
 102     default:
 103         return false;
 104     }
 105 }
 106
 107 void GraphDumpHandler::getUsage(osg::ApplicationUsage& usage) const
 108 {
 109     std::ostringstream ostr;
 110     ostr << char(_keyDump);
 111             usage.addKeyboardMouseBinding(ostr.str(),
 112                                           "Dump scene graph to file");
 113 }
 114
 115 int
 116 fgviewerMain(int argc, char** argv)
 117 {
 118
 119     sgUserDataInit(0);
 120     DummyLoadHelper dummyLoadHelper;
 121     simgear::TileEntry::setModelLoadHelper(&dummyLoadHelper);
 122
 123     // use an ArgumentParser object to manage the program arguments.
 124     osg::ArgumentParser arguments(&argc, argv);
 125
 126     // construct the viewer.
 127     osgViewer::Viewer viewer(arguments);
 128     osg::Camera* camera = viewer.getCamera();
 129     osgViewer::Renderer* renderer
 130         = static_cast<osgViewer::Renderer*>(camera->getRenderer());
 131     for (int i = 0; i < 2; ++i) {
 132         osgUtil::SceneView* sceneView = renderer->getSceneView(i);
 133         sceneView->setCullVisitor(new simgear::EffectCullVisitor);
 134     }
 135     // Shaders expect valid fog
 136     osg::StateSet* cameraSS = camera->getOrCreateStateSet();
 137     osg::Fog* fog = new osg::Fog;
 138     fog->setMode(osg::Fog::EXP2);
 139     fog->setColor(osg::Vec4(1.0, 1.0, 1.0, 1.0));
 140     fog->setDensity(.0000001);
 141     cameraSS->setAttributeAndModes(fog);
 142     // ... for some reason, get rid of that FIXME!
 143     viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
 144
 145     // set up the camera manipulators.
 146     osgGA::KeySwitchMatrixManipulator* keyswitchManipulator;
 147     keyswitchManipulator = new osgGA::KeySwitchMatrixManipulator;
 148
 149     osgGA::MatrixManipulator* mm = new osgGA::TrackballManipulator;
 150     keyswitchManipulator->addMatrixManipulator('1', "Trackball", mm);
 151     mm = new osgGA::FlightManipulator;
 152     keyswitchManipulator->addMatrixManipulator('2', "Flight", mm);
 153     mm = new osgGA::DriveManipulator;
 154     keyswitchManipulator->addMatrixManipulator('3', "Drive", mm);
 155     mm = new osgGA::TerrainManipulator;
 156     keyswitchManipulator->addMatrixManipulator('4', "Terrain", mm);
 157
 158     viewer.setCameraManipulator(keyswitchManipulator);
 159
 160     // Usefull stats
 161     viewer.addEventHandler(new osgViewer::HelpHandler);
 162     viewer.addEventHandler(new osgViewer::StatsHandler);
 163     viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
 164     // Same FIXME ...
 165     // viewer.addEventHandler(new osgViewer::ThreadingHandler);
 166     viewer.addEventHandler(new osgViewer::LODScaleHandler);
 167     viewer.addEventHandler(new osgViewer::ScreenCaptureHandler);
 168
 169     viewer.addEventHandler(new GraphDumpHandler);
 170
 171     // Extract files to load from arguments now; this way fgInitConfig
 172     // won't choke on them.
 173     string_list dataFiles;
 174     for (int i = arguments.argc() - 1; i >= 0; --i) {
 175         if (arguments.isOption(i)) {
 176             break;
 177         } else {
 178             dataFiles.insert(dataFiles.begin(), arguments[i]);
 179             arguments.remove(i);
 180         }
 181     }
 182
 183     // A subset of full flightgear initialization.
 184     // Allocate global data structures.  This needs to happen before
 185     // we parse command line options
 186
 187     globals = new FGGlobals;
 188
 189     fgInitFGRoot(arguments.argc(), arguments.argv());
 190     if ( !fgInitConfig(arguments.argc(), arguments.argv()) ) {
 191         SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
 192         exit(-1);
 193     }
 194
 195     osgDB::FilePathList filePathList
 196         = osgDB::Registry::instance()->getDataFilePathList();
 197     filePathList.push_back(globals->get_fg_root());
 198
 199     string_list path_list = globals->get_fg_scenery();
 200     for (unsigned i = 0; i < path_list.size(); ++i) {
 201         filePathList.push_back(path_list[i]);
 202     }
 203
 204     globals->set_matlib( new SGMaterialLib );
 205     simgear::SGModelLib::init(globals->get_fg_root());
 206
 207     // Initialize the material property subsystem.
 208
 209     SGPath mpath( globals->get_fg_root() );
 210     mpath.append( "materials.xml" );
 211     if ( ! globals->get_matlib()->load(globals->get_fg_root(), mpath.str(),
 212             globals->get_props()) ) {
 213         SG_LOG( SG_GENERAL, SG_ALERT, "Error loading material lib!" );
 214         exit(-1);
 215     }
 216
 217     globals->set_scenery( new FGScenery );
 218     globals->get_scenery()->init();
 219     globals->get_scenery()->bind();
 220
 221     // The file path list must be set in the registry.
 222     osgDB::Registry::instance()->getDataFilePathList() = filePathList;
 223
 224     SGReaderWriterBTGOptions* btgOptions = new SGReaderWriterBTGOptions;
 225     btgOptions->getDatabasePathList() = filePathList;
 226     btgOptions->setMatlib(globals->get_matlib());
 227     btgOptions->setUseRandomObjects(fgGetBool("/sim/rendering/random-objects", false));
 228     btgOptions->setUseRandomVegetation(fgGetBool("/sim/rendering/random-vegetation", false));
 229
 230     // read the scene from the list of file specified command line args.
 231     osg::ref_ptr<osg::Node> loadedModel;
 232     loadedModel = osgDB::readNodeFiles(dataFiles, btgOptions);
 233
 234     // if no model has been successfully loaded report failure.
 235     if (!loadedModel.valid()) {
 236         std::cerr << arguments.getApplicationName()
 237                   << ": No data loaded" << std::endl;
 238         return EXIT_FAILURE;
 239     }
 240
 241     // pass the loaded scene graph to the viewer.
 242     viewer.setSceneData(loadedModel.get());
 243
 244     return viewer.run();
 245 }