src/Viewer/fgviewer.cxx

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