src/Model/acmodel.cxx

   1 // model.cxx - manage a 3D aircraft model.
   2 // Written by David Megginson, started 2002.
   3 //
   4 // This file is in the Public Domain, and comes with no warranty.
   5
   6 #ifdef HAVE_CONFIG_H
   7 #  include <config.h>
   8 #endif
   9
  10 #include <string.h>             // for strcmp()
  11
  12 #include <plib/sg.h>
  13 #include <plib/ssg.h>
  14
  15 #include <simgear/compiler.h>
  16 #include <simgear/debug/logstream.hxx>
  17 #include <simgear/structure/exception.hxx>
  18 #include <simgear/misc/sg_path.hxx>
  19 #include <simgear/scene/model/placement.hxx>
  20 #include <simgear/scene/model/shadowvolume.hxx>
  21
  22 #include <Main/globals.hxx>
  23 #include <Main/fg_props.hxx>
  24 #include <Main/renderer.hxx>
  25 #include <Main/viewmgr.hxx>
  26 #include <Main/viewer.hxx>
  27 #include <Scenery/scenery.hxx>
  28
  29 #include "model_panel.hxx"
  30
  31 #include "acmodel.hxx"
  32
  33
  34 class fgLoaderOptions : ssgLoaderOptions {
  35
  36 public:
  37     virtual void makeTexturePath ( char* path, const char *fname ) const ;
  38     string livery_path;
  39
  40 };
  41
  42 void fgLoaderOptions::makeTexturePath ( char *path, const char *fname ) const
  43 {
  44   /* Remove all leading path information. */
  45   const char* seps = "\\/" ;
  46   const char* fn = & fname [ strlen ( fname ) - 1 ] ;
  47   for ( ; fn != fname && strchr(seps,*fn) == NULL ; fn-- )
  48     /* Search back for a seperator */ ;
  49   if ( strchr(seps,*fn) != NULL )
  50     fn++ ;
  51   fname = fn ;
  52   // if we have a livery path and the texture is found there then we use that
  53   // path in priority, if the texture was not found or we add no additional
  54   // livery path then we use the current model path or model/texture-path
  55   if( livery_path.size() ) {
  56       make_path( path, livery_path.c_str(), fname );
  57       if( ulFileExists( path ) )
  58           return;
  59   }
  60   make_path ( path, texture_dir, fname ) ;
  61 }
  62
  63 static fgLoaderOptions _fgLoaderOptions;
  64
  65 \f
  66 ////////////////////////////////////////////////////////////////////////
  67 // Implementation of FGAircraftModel
  68 ////////////////////////////////////////////////////////////////////////
  69
  70 FGAircraftModel::FGAircraftModel ()
  71   : _aircraft(0),
  72     _selector(new ssgSelector),
  73     _scene(new ssgRoot),
  74     _nearplane(0.10f),
  75     _farplane(1000.0f)
  76 {
  77 }
  78
  79 FGAircraftModel::~FGAircraftModel ()
  80 {
  81   // Unregister that one at the scenery manager
  82   if (_aircraft)
  83     globals->get_scenery()->unregister_placement_transform(_aircraft->getTransform());
  84
  85   delete _aircraft;
  86                                 // SSG will delete it
  87   globals->get_scenery()->get_aircraft_branch()->removeKid(_selector);
  88 }
  89
  90 void
  91 FGAircraftModel::init ()
  92 {
  93   ssgLoaderOptions *currLoaderOptions = ssgGetCurrentOptions();
  94   ssgSetCurrentOptions( (ssgLoaderOptions*)&_fgLoaderOptions );
  95   _aircraft = new SGModelPlacement;
  96   string path = fgGetString("/sim/model/path", "Models/Geometry/glider.ac");
  97   string texture_path = fgGetString("/sim/model/texture-path");
  98   if( texture_path.size() ) {
  99       SGPath temp_path;
 100       if ( !ulIsAbsolutePathName( texture_path.c_str() ) ) {
 101           temp_path = globals->get_fg_root();
 102           temp_path.append( SGPath( path ).dir() );
 103           temp_path.append( texture_path );
 104           _fgLoaderOptions.livery_path = temp_path.str();
 105       } else
 106           _fgLoaderOptions.livery_path = texture_path;
 107   }
 108   try {
 109     ssgBranch *model = fgLoad3DModelPanel( globals->get_fg_root(),
 110                                            path,
 111                                            globals->get_props(),
 112                                            globals->get_sim_time_sec() );
 113     _aircraft->init( model );
 114   } catch (const sg_exception &ex) {
 115     SG_LOG(SG_GENERAL, SG_ALERT, "Failed to load aircraft from " << path);
 116     SG_LOG(SG_GENERAL, SG_ALERT, "(Falling back to glider.ac.)");
 117     ssgBranch *model = fgLoad3DModelPanel( globals->get_fg_root(),
 118                                            "Models/Geometry/glider.ac",
 119                                            globals->get_props(),
 120                                            globals->get_sim_time_sec() );
 121     _aircraft->init( model );
 122   }
 123   _scene->addKid(_aircraft->getSceneGraph());
 124   _selector->addKid(_aircraft->getSceneGraph());
 125   globals->get_scenery()->get_aircraft_branch()->addKid(_selector);
 126
 127   // Register that one at the scenery manager
 128   globals->get_scenery()->register_placement_transform(_aircraft->getTransform());
 129   ssgSetCurrentOptions( currLoaderOptions );
 130 }
 131
 132 void
 133 FGAircraftModel::bind ()
 134 {
 135   // No-op
 136 }
 137
 138 void
 139 FGAircraftModel::unbind ()
 140 {
 141   // No-op
 142 }
 143
 144 void
 145 FGAircraftModel::update (double dt)
 146 {
 147   int view_number = globals->get_viewmgr()->get_current();
 148   int is_internal = fgGetBool("/sim/current-view/internal");
 149
 150   if (view_number == 0 && !is_internal) {
 151     _aircraft->setVisible(false);
 152   } else {
 153     _aircraft->setVisible(true);
 154   }
 155
 156   _aircraft->setPosition(fgGetDouble("/position/longitude-deg"),
 157                          fgGetDouble("/position/latitude-deg"),
 158                          fgGetDouble("/position/altitude-ft"));
 159   _aircraft->setOrientation(fgGetDouble("/orientation/roll-deg"),
 160                             fgGetDouble("/orientation/pitch-deg"),
 161                             fgGetDouble("/orientation/heading-deg"));
 162   _aircraft->update();
 163 }
 164
 165 void
 166 FGAircraftModel::draw ()
 167 {
 168                                 // OK, now adjust the clip planes and draw
 169                                 // FIXME: view number shouldn't be
 170                                 // hard-coded.
 171   bool is_internal = globals->get_current_view()->getInternal();
 172   if (_aircraft->getVisible() && is_internal) {
 173     glClearDepth(1);
 174     glClear(GL_DEPTH_BUFFER_BIT);
 175     FGRenderer::setNearFar(_nearplane, _farplane);
 176     ssgCullAndDraw(_scene);
 177     _selector->select(0);
 178   } else {
 179     _selector->select(1);
 180     // in external view the shadows are drawn before the transparent parts of the ac
 181     _scene->setTravCallback( SSG_CALLBACK_POSTTRAV, SGShadowVolume::ACpostTravCB);
 182     ssgCullAndDraw(_scene);
 183     _scene->setTravCallback( SSG_CALLBACK_POSTTRAV, 0);
 184   }
 185
 186 }
 187
 188 // end of model.cxx