src/Main/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/tgdb/SGReaderWriterBTGOptions.hxx>
  29 #include <simgear/scene/tgdb/userdata.hxx>
  30 #include <simgear/scene/tgdb/TileEntry.hxx>
  31 #include <simgear/scene/model/ModelRegistry.hxx>
  32 #include <simgear/scene/model/modellib.hxx>
  33
  34 #include <Scenery/scenery.hxx>
  35
  36 #include "fg_init.hxx"
  37 #include "fg_props.hxx"
  38 #include "globals.hxx"
  39 #include "options.hxx"
  40
  41 class DummyLoadHelper : public simgear::ModelLoadHelper {
  42 public:
  43     virtual osg::Node *loadTileModel(const string& modelPath, bool)
  44     {
  45         try {
  46             SGSharedPtr<SGPropertyNode> prop = new SGPropertyNode;
  47             return simgear::SGModelLib::loadModel(modelPath,
  48                                                   globals->get_props());
  49         } catch (...) {
  50             std::cerr << "Error loading \"" << modelPath << "\"" << std::endl;
  51             return 0;
  52         }
  53     }
  54 };
  55
  56 class GraphDumpHandler : public  osgGA::GUIEventHandler
  57 {
  58 public:
  59     GraphDumpHandler() : _keyDump('d') {}
  60     void setKeyDump(int key) { _keyDump = key; }
  61     int getKeyDump() const { return _keyDump; }
  62     bool handle(const osgGA::GUIEventAdapter& ea, osgGA::GUIActionAdapter& aa);
  63
  64     /** Get the keyboard and mouse usage of this manipulator.*/
  65     virtual void getUsage(osg::ApplicationUsage& usage) const;
  66 protected:
  67     int _keyDump;
  68 };
  69
  70 static void dumpOut(osg::Node* node)
  71 {
  72     char filename[24];
  73     static int count = 1;
  74
  75     while (count < 1000) {
  76         FILE *fp;
  77         snprintf(filename, 24, "fgviewer-%03d.osg", count++);
  78         if ( (fp = fopen(filename, "r")) == NULL )
  79             break;
  80         fclose(fp);
  81     }
  82
  83     if (osgDB::writeNodeFile(*node, filename))
  84         std::cerr << "Entire scene graph saved to \"" << filename << "\".\n";
  85     else
  86         std::cerr << "Failed to save to \"" << filename << "\".\n";
  87 }
  88
  89 bool GraphDumpHandler::handle(const osgGA::GUIEventAdapter& ea,
  90                               osgGA::GUIActionAdapter& aa)
  91 {
  92     osgViewer::View* view = dynamic_cast<osgViewer::View*>(&aa);
  93     if (!view)
  94         return false;
  95     if (ea.getHandled())
  96         return false;
  97     switch(ea.getEventType()) {
  98     case osgGA::GUIEventAdapter::KEYUP:
  99         if (ea.getKey() == _keyDump) {
 100             dumpOut(view->getScene()->getSceneData());
 101             return true;
 102         }
 103         break;
 104     default:
 105         return false;
 106     }
 107     return false;
 108 }
 109
 110 void GraphDumpHandler::getUsage(osg::ApplicationUsage& usage) const
 111 {
 112     std::ostringstream ostr;
 113     ostr << char(_keyDump);
 114             usage.addKeyboardMouseBinding(ostr.str(),
 115                                           "Dump scene graph to file");
 116 }
 117
 118 int
 119 fgviewerMain(int argc, char** argv)
 120 {
 121
 122     sgUserDataInit(0);
 123     DummyLoadHelper dummyLoadHelper;
 124     simgear::TileEntry::setModelLoadHelper(&dummyLoadHelper);
 125
 126     // use an ArgumentParser object to manage the program arguments.
 127     osg::ArgumentParser arguments(&argc, argv);
 128
 129     // construct the viewer.
 130     osgViewer::Viewer viewer(arguments);
 131     osg::Camera* camera = viewer.getCamera();
 132     osgViewer::Renderer* renderer
 133         = static_cast<osgViewer::Renderer*>(camera->getRenderer());
 134     for (int i = 0; i < 2; ++i) {
 135         osgUtil::SceneView* sceneView = renderer->getSceneView(i);
 136         sceneView->setCullVisitor(new simgear::EffectCullVisitor);
 137     }
 138     // Shaders expect valid fog
 139     osg::StateSet* cameraSS = camera->getOrCreateStateSet();
 140     osg::Fog* fog = new osg::Fog;
 141     fog->setMode(osg::Fog::EXP2);
 142     fog->setColor(osg::Vec4(1.0, 1.0, 1.0, 1.0));
 143     fog->setDensity(.0000001);
 144     cameraSS->setAttributeAndModes(fog);
 145     // ... for some reason, get rid of that FIXME!
 146     viewer.setThreadingModel(osgViewer::Viewer::SingleThreaded);
 147
 148     // set up the camera manipulators.
 149     osgGA::KeySwitchMatrixManipulator* keyswitchManipulator;
 150     keyswitchManipulator = new osgGA::KeySwitchMatrixManipulator;
 151
 152     osgGA::MatrixManipulator* mm = new osgGA::TrackballManipulator;
 153     keyswitchManipulator->addMatrixManipulator('1', "Trackball", mm);
 154     mm = new osgGA::FlightManipulator;
 155     keyswitchManipulator->addMatrixManipulator('2', "Flight", mm);
 156     mm = new osgGA::DriveManipulator;
 157     keyswitchManipulator->addMatrixManipulator('3', "Drive", mm);
 158     mm = new osgGA::TerrainManipulator;
 159     keyswitchManipulator->addMatrixManipulator('4', "Terrain", mm);
 160
 161     viewer.setCameraManipulator(keyswitchManipulator);
 162
 163     // Usefull stats
 164     viewer.addEventHandler(new osgViewer::HelpHandler);
 165     viewer.addEventHandler(new osgViewer::StatsHandler);
 166     viewer.addEventHandler( new osgGA::StateSetManipulator(viewer.getCamera()->getOrCreateStateSet()) );
 167     // Same FIXME ...
 168     // viewer.addEventHandler(new osgViewer::ThreadingHandler);
 169     viewer.addEventHandler(new osgViewer::LODScaleHandler);
 170     viewer.addEventHandler(new osgViewer::ScreenCaptureHandler);
 171
 172     viewer.addEventHandler(new GraphDumpHandler);
 173
 174     // Extract files to load from arguments now; this way fgInitConfig
 175     // won't choke on them.
 176     string_list dataFiles;
 177     for (int i = arguments.argc() - 1; i >= 0; --i) {
 178         if (arguments.isOption(i)) {
 179             break;
 180         } else {
 181             dataFiles.insert(dataFiles.begin(), arguments[i]);
 182             arguments.remove(i);
 183         }
 184     }
 185
 186     // A subset of full flightgear initialization.
 187     // Allocate global data structures.  This needs to happen before
 188     // we parse command line options
 189
 190     globals = new FGGlobals;
 191
 192     fgInitFGRoot(arguments.argc(), arguments.argv());
 193     if ( !fgInitConfig(arguments.argc(), arguments.argv()) ) {
 194         SG_LOG( SG_GENERAL, SG_ALERT, "Config option parsing failed ..." );
 195         exit(-1);
 196     }
 197
 198     osgDB::FilePathList filePathList
 199         = osgDB::Registry::instance()->getDataFilePathList();
 200     filePathList.push_back(globals->get_fg_root());
 201
 202     string_list path_list = globals->get_fg_scenery();
 203     for (unsigned i = 0; i < path_list.size(); ++i) {
 204         filePathList.push_back(path_list[i]);
 205     }
 206
 207     globals->set_matlib( new SGMaterialLib );
 208     simgear::SGModelLib::init(globals->get_fg_root());
 209
 210     // Initialize the material property subsystem.
 211
 212     SGPath mpath( globals->get_fg_root() );
 213     mpath.append( "materials.xml" );
 214     if ( ! globals->get_matlib()->load(globals->get_fg_root(), mpath.str(),
 215             globals->get_props()) ) {
 216         SG_LOG( SG_GENERAL, SG_ALERT, "Error loading material lib!" );
 217         exit(-1);
 218     }
 219
 220     globals->set_scenery( new FGScenery );
 221     globals->get_scenery()->init();
 222     globals->get_scenery()->bind();
 223
 224     // The file path list must be set in the registry.
 225     osgDB::Registry::instance()->getDataFilePathList() = filePathList;
 226
 227     SGReaderWriterBTGOptions* btgOptions = new SGReaderWriterBTGOptions;
 228     btgOptions->getDatabasePathList() = filePathList;
 229     btgOptions->setMatlib(globals->get_matlib());
 230     btgOptions->setUseRandomObjects(fgGetBool("/sim/rendering/random-objects", false));
 231     btgOptions->setUseRandomVegetation(fgGetBool("/sim/rendering/random-vegetation", false));
 232
 233     // read the scene from the list of file specified command line args.
 234     osg::ref_ptr<osg::Node> loadedModel;
 235     loadedModel = osgDB::readNodeFiles(dataFiles, btgOptions);
 236
 237     // if no model has been successfully loaded report failure.
 238     if (!loadedModel.valid()) {
 239         std::cerr << arguments.getApplicationName()
 240                   << ": No data loaded" << std::endl;
 241         return EXIT_FAILURE;
 242     }
 243
 244     // pass the loaded scene graph to the viewer.
 245     viewer.setSceneData(loadedModel.get());
 246
 247     return viewer.run();
 248 }