src/Viewer/renderer.cxx

   1 // renderer.cxx -- top level sim routines
   2 //
   3 // Written by Curtis Olson, started May 1997.
   4 // This file contains parts of main.cxx prior to october 2004
   5 //
   6 // Copyright (C) 1997 - 2002  Curtis L. Olson  - http://www.flightgear.org/~curt
   7 //
   8 // This program is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU General Public License as
  10 // published by the Free Software Foundation; either version 2 of the
  11 // License, or (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful, but
  14 // WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  21
  22 #ifdef HAVE_CONFIG_H
  23 #  include <config.h>
  24 #endif
  25
  26 #ifdef HAVE_WINDOWS_H
  27 #  include <windows.h>
  28 #endif
  29
  30 #include <simgear/compiler.h>
  31
  32 #include <algorithm>
  33 #include <iostream>
  34 #include <map>
  35 #include <vector>
  36 #include <typeinfo>
  37
  38 #include <boost/foreach.hpp>
  39
  40 #include <osg/ref_ptr>
  41 #include <osg/AlphaFunc>
  42 #include <osg/BlendFunc>
  43 #include <osg/Camera>
  44 #include <osg/CullFace>
  45 #include <osg/CullStack>
  46 #include <osg/Depth>
  47 #include <osg/Fog>
  48 #include <osg/Group>
  49 #include <osg/Hint>
  50 #include <osg/Light>
  51 #include <osg/LightModel>
  52 #include <osg/LightSource>
  53 #include <osg/Material>
  54 #include <osg/Math>
  55 #include <osg/NodeCallback>
  56 #include <osg/Notify>
  57 #include <osg/PolygonMode>
  58 #include <osg/PolygonOffset>
  59 #include <osg/Program>
  60 #include <osg/Version>
  61 #include <osg/TexEnv>
  62
  63 #include <osgUtil/LineSegmentIntersector>
  64
  65 #include <osg/io_utils>
  66 #include <osgDB/WriteFile>
  67 #include <osgViewer/Renderer>
  68
  69 #include <simgear/scene/material/matlib.hxx>
  70 #include <simgear/scene/material/EffectCullVisitor.hxx>
  71 #include <simgear/scene/material/Effect.hxx>
  72 #include <simgear/scene/material/EffectGeode.hxx>
  73 #include <simgear/scene/material/EffectBuilder.hxx>
  74 #include <simgear/scene/model/animation.hxx>
  75 #include <simgear/scene/model/placement.hxx>
  76 #include <simgear/scene/sky/sky.hxx>
  77 #include <simgear/scene/util/DeletionManager.hxx>
  78 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  79 #include <simgear/scene/util/RenderConstants.hxx>
  80 #include <simgear/scene/util/SGSceneUserData.hxx>
  81 #include <simgear/scene/tgdb/GroundLightManager.hxx>
  82 #include <simgear/scene/tgdb/pt_lights.hxx>
  83 #include <simgear/scene/tgdb/userdata.hxx>
  84 #include <simgear/structure/OSGUtils.hxx>
  85 #include <simgear/props/props.hxx>
  86 #include <simgear/timing/sg_time.hxx>
  87 #include <simgear/ephemeris/ephemeris.hxx>
  88 #include <simgear/math/sg_random.h>
  89
  90 #include <Time/light.hxx>
  91 #include <Time/light.hxx>
  92 #include <Cockpit/panel.hxx>
  93
  94 #include <Model/panelnode.hxx>
  95 #include <Model/modelmgr.hxx>
  96 #include <Model/acmodel.hxx>
  97 #include <Scenery/scenery.hxx>
  98 #include <Scenery/redout.hxx>
  99 #include <GUI/new_gui.hxx>
 100 #include <GUI/gui.h>
 101
 102 #include <Instrumentation/HUD/HUD.hxx>
 103 #include <Environment/precipitation_mgr.hxx>
 104 #include <Environment/environment_mgr.hxx>
 105
 106 //#include <Main/main.hxx>
 107 #include "viewer.hxx"
 108 #include "viewmgr.hxx"
 109 #include "splash.hxx"
 110 #include "renderer.hxx"
 111 #include "CameraGroup.hxx"
 112 #include "FGEventHandler.hxx"
 113
 114 #include <plib/pu.h>
 115
 116 using namespace osg;
 117 using namespace simgear;
 118 using namespace flightgear;
 119
 120 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 121 public:
 122   FGHintUpdateCallback(const char* configNode) :
 123     mConfigNode(fgGetNode(configNode, true))
 124   { }
 125   virtual void operator()(osg::StateAttribute* stateAttribute,
 126                           osg::NodeVisitor*)
 127   {
 128     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 129     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 130
 131     const char* value = mConfigNode->getStringValue();
 132     if (!value)
 133       hint->setMode(GL_DONT_CARE);
 134     else if (0 == strcmp(value, "nicest"))
 135       hint->setMode(GL_NICEST);
 136     else if (0 == strcmp(value, "fastest"))
 137       hint->setMode(GL_FASTEST);
 138     else
 139       hint->setMode(GL_DONT_CARE);
 140   }
 141 private:
 142   SGPropertyNode_ptr mConfigNode;
 143 };
 144
 145
 146 class SGPuDrawable : public osg::Drawable {
 147 public:
 148   SGPuDrawable()
 149   {
 150     // Dynamic stuff, do not store geometry
 151     setUseDisplayList(false);
 152     setDataVariance(Object::DYNAMIC);
 153
 154     osg::StateSet* stateSet = getOrCreateStateSet();
 155     stateSet->setRenderBinDetails(1001, "RenderBin");
 156     // speed optimization?
 157     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 158     // We can do translucent menus, so why not. :-)
 159     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 160     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 161     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 162
 163     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 164
 165     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 166     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 167   }
 168   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 169   { drawImplementation(*renderInfo.getState()); }
 170   void drawImplementation(osg::State& state) const
 171   {
 172     state.setActiveTextureUnit(0);
 173     state.setClientActiveTextureUnit(0);
 174
 175     state.disableAllVertexArrays();
 176
 177     glPushAttrib(GL_ALL_ATTRIB_BITS);
 178     glPushClientAttrib(~0u);
 179
 180     puDisplay();
 181
 182     glPopClientAttrib();
 183     glPopAttrib();
 184   }
 185
 186   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 187   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 188
 189 private:
 190 };
 191
 192 class SGHUDDrawable : public osg::Drawable {
 193 public:
 194   SGHUDDrawable()
 195   {
 196     // Dynamic stuff, do not store geometry
 197     setUseDisplayList(false);
 198     setDataVariance(Object::DYNAMIC);
 199
 200     osg::StateSet* stateSet = getOrCreateStateSet();
 201     stateSet->setRenderBinDetails(1000, "RenderBin");
 202
 203     // speed optimization?
 204     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 205     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 206     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 207     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 208     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 209
 210     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 211   }
 212   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 213   { drawImplementation(*renderInfo.getState()); }
 214   void drawImplementation(osg::State& state) const
 215   {
 216     state.setActiveTextureUnit(0);
 217     state.setClientActiveTextureUnit(0);
 218     state.disableAllVertexArrays();
 219
 220     glPushAttrib(GL_ALL_ATTRIB_BITS);
 221     glPushClientAttrib(~0u);
 222
 223     // HUD can be NULL
 224       HUD *hud = static_cast<HUD*>(globals->get_subsystem("hud"));
 225       if (hud) {
 226           hud->draw(state);
 227       }
 228
 229     glPopClientAttrib();
 230     glPopAttrib();
 231   }
 232
 233   virtual osg::Object* cloneType() const { return new SGHUDDrawable; }
 234   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDDrawable; }
 235
 236 private:
 237 };
 238
 239 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 240 public:
 241
 242   /**
 243    * @param isSun true if the light is the actual sun i.e., for
 244    * illuminating the moon.
 245    */
 246   FGLightSourceUpdateCallback(bool isSun = false) : _isSun(isSun) {}
 247   FGLightSourceUpdateCallback(const FGLightSourceUpdateCallback& nc,
 248                               const CopyOp& op)
 249     : NodeCallback(nc, op), _isSun(nc._isSun)
 250   {}
 251   META_Object(flightgear,FGLightSourceUpdateCallback);
 252
 253   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 254   {
 255     assert(dynamic_cast<osg::LightSource*>(node));
 256     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 257     osg::Light* light = lightSource->getLight();
 258
 259     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 260       if (!l) {
 261           // lighting is down during re-init
 262           return;
 263       }
 264
 265     if (_isSun) {
 266       light->setAmbient(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 267       light->setDiffuse(Vec4(1.0f, 1.0f, 1.0f, 1.0f));
 268       light->setSpecular(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 269     } else {
 270       light->setAmbient(toOsg(l->scene_ambient()));
 271       light->setDiffuse(toOsg(l->scene_diffuse()));
 272       light->setSpecular(toOsg(l->scene_specular()));
 273     }
 274     osg::Vec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 275     light->setPosition(position);
 276
 277     traverse(node, nv);
 278   }
 279 private:
 280   const bool _isSun;
 281 };
 282
 283 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 284 public:
 285   FGWireFrameModeUpdateCallback() :
 286     mWireframe(fgGetNode("/sim/rendering/wireframe", true))
 287   { }
 288   virtual void operator()(osg::StateAttribute* stateAttribute,
 289                           osg::NodeVisitor*)
 290   {
 291     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 292     osg::PolygonMode* polygonMode;
 293     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 294
 295     if (mWireframe->getBoolValue())
 296       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 297                            osg::PolygonMode::LINE);
 298     else
 299       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 300                            osg::PolygonMode::FILL);
 301   }
 302 private:
 303   SGPropertyNode_ptr mWireframe;
 304 };
 305
 306 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 307 public:
 308   FGLightModelUpdateCallback() :
 309     mHighlights(fgGetNode("/sim/rendering/specular-highlight", true))
 310   { }
 311   virtual void operator()(osg::StateAttribute* stateAttribute,
 312                           osg::NodeVisitor*)
 313   {
 314     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 315     osg::LightModel* lightModel;
 316     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 317
 318 #if 0
 319     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 320     lightModel->setAmbientIntensity(toOsg(l->scene_ambient());
 321 #else
 322     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 323 #endif
 324     lightModel->setTwoSided(true);
 325     lightModel->setLocalViewer(false);
 326
 327     if (mHighlights->getBoolValue()) {
 328       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 329     } else {
 330       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 331     }
 332   }
 333 private:
 334   SGPropertyNode_ptr mHighlights;
 335 };
 336
 337 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 338 public:
 339   FGFogEnableUpdateCallback() :
 340     mFogEnabled(fgGetNode("/sim/rendering/fog", true))
 341   { }
 342   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 343   {
 344     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 345       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 346     } else {
 347       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 348     }
 349   }
 350 private:
 351   SGPropertyNode_ptr mFogEnabled;
 352 };
 353
 354 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 355 public:
 356   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 357   {
 358     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 359     assert(dynamic_cast<osg::Fog*>(sa));
 360     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 361     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 362     fog->setMode(osg::Fog::EXP2);
 363     fog->setColor(toOsg(updateVisitor->getFogColor()));
 364     fog->setDensity(updateVisitor->getFogExp2Density());
 365   }
 366 };
 367
 368 // update callback for the switch node guarding that splash
 369 class FGScenerySwitchCallback : public osg::NodeCallback {
 370 public:
 371   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 372   {
 373     assert(dynamic_cast<osg::Switch*>(node));
 374     osg::Switch* sw = static_cast<osg::Switch*>(node);
 375
 376     bool enabled = scenery_enabled;
 377     sw->setValue(0, enabled);
 378     if (!enabled)
 379       return;
 380     traverse(node, nv);
 381   }
 382
 383   static bool scenery_enabled;
 384 };
 385
 386 bool FGScenerySwitchCallback::scenery_enabled = false;
 387
 388 FGRenderer::FGRenderer() :
 389     _sky(NULL),
 390     _ambientFactor( new osg::Uniform( "fg_SunAmbientColor", osg::Vec4f() ) ),
 391     _sunDiffuse( new osg::Uniform( "fg_SunDiffuseColor", osg::Vec4f() ) ),
 392     _sunSpecular( new osg::Uniform( "fg_SunSpecularColor", osg::Vec4f() ) ),
 393     _sunDirection( new osg::Uniform( "fg_SunDirection", osg::Vec3f() ) ),
 394     _planes( new osg::Uniform( "fg_Planes", osg::Vec3f() ) ),
 395     _fogColor( new osg::Uniform( "fg_FogColor", osg::Vec4f(1.0, 1.0, 1.0, 1.0) ) ),
 396     _fogDensity( new osg::Uniform( "fg_FogDensity", 0.0001f ) ),
 397     _shadowNumber( new osg::Uniform( "fg_ShadowNumber", (int)4 ) ),
 398     _shadowDistances( new osg::Uniform( "fg_ShadowDistances", osg::Vec4f(5.0, 50.0, 500.0, 5000.0 ) ) ),
 399     _depthInColor( new osg::Uniform( "fg_DepthInColor", false ) )
 400 {
 401     // it's not the real root, whatever that means
 402     _root = new osg::Group;
 403     _root->setName("fakeRoot");
 404
 405     _updateVisitor = new SGUpdateVisitor;
 406
 407   // when Rembrandt is enabled, we use this group to access the whole
 408   // scene. Since the only child is the _viewerSceneRoot, we could
 409   // simply copy the reference, we don't need the additional group.
 410     _deferredRealRoot = new osg::Group;
 411
 412    _numCascades = 4;
 413    _cascadeFar[0] = 5.f;
 414    _cascadeFar[1] = 50.f;
 415    _cascadeFar[2] = 500.f;
 416    _cascadeFar[3] = 5000.f;
 417 }
 418
 419 FGRenderer::~FGRenderer()
 420 {
 421     SGPropertyChangeListenerVec::iterator i = _listeners.begin();
 422     for (; i != _listeners.end(); ++i) {
 423         delete *i;
 424     }
 425
 426     // replace the viewer's scene completely
 427     if (getViewer()) {
 428         getViewer()->setSceneData(new osg::Group);
 429     }
 430
 431     delete _sky;
 432 }
 433
 434 // Initialize various GL/view parameters
 435 // XXX This should be called "preinit" or something, as it initializes
 436 // critical parts of the scene graph in addition to the splash screen.
 437 void
 438 FGRenderer::splashinit( void )
 439 {
 440     // important that we reset the viewer sceneData here, to ensure the reference
 441     // time for everything is in sync; otherwise on reset the Viewer and
 442     // GraphicsWindow clocks are out of sync.
 443     osgViewer::Viewer* viewer = getViewer();
 444     viewer->setName("osgViewer");
 445     _viewerSceneRoot = new osg::Group;
 446     _viewerSceneRoot->setName("viewerSceneRoot");
 447     viewer->setSceneData(_viewerSceneRoot);
 448
 449     ref_ptr<Node> splashNode = fgCreateSplashNode();
 450     if (_classicalRenderer) {
 451         _viewerSceneRoot->addChild(splashNode.get());
 452     } else {
 453         for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
 454                 ii != CameraGroup::getDefault()->camerasEnd();
 455                 ++ii )
 456         {
 457             CameraInfo* info = ii->get();
 458             Camera* camera = info->getCamera(DISPLAY_CAMERA);
 459             if (camera == 0) continue;
 460
 461             camera->addChild(splashNode.get());
 462         }
 463     }
 464
 465     _frameStamp = new osg::FrameStamp;
 466     viewer->setFrameStamp(_frameStamp.get());
 467     // Scene doesn't seem to pass the frame stamp to the update
 468     // visitor automatically.
 469     _updateVisitor->setFrameStamp(_frameStamp.get());
 470     viewer->setUpdateVisitor(_updateVisitor.get());
 471     fgSetDouble("/sim/startup/splash-alpha", 1.0);
 472 }
 473
 474 class ShadowMapSizeListener : public SGPropertyChangeListener {
 475 public:
 476     virtual void valueChanged(SGPropertyNode* node) {
 477         globals->get_renderer()->updateShadowMapSize(node->getIntValue());
 478     }
 479 };
 480
 481 class ShadowEnabledListener : public SGPropertyChangeListener {
 482 public:
 483     virtual void valueChanged(SGPropertyNode* node) {
 484         globals->get_renderer()->enableShadows(node->getBoolValue());
 485     }
 486 };
 487
 488 class ShadowNumListener : public SGPropertyChangeListener {
 489 public:
 490     virtual void valueChanged(SGPropertyNode* node) {
 491         globals->get_renderer()->updateCascadeNumber(node->getIntValue());
 492     }
 493 };
 494
 495 class ShadowRangeListener : public SGPropertyChangeListener {
 496 public:
 497     virtual void valueChanged(SGPropertyNode* node) {
 498         globals->get_renderer()->updateCascadeFar(node->getIndex(), node->getFloatValue());
 499     }
 500 };
 501
 502 void
 503 FGRenderer::addChangeListener(SGPropertyChangeListener* l, const char* path)
 504 {
 505     _listeners.push_back(l);
 506     fgAddChangeListener(l, path);
 507 }
 508
 509 void
 510 FGRenderer::init( void )
 511 {
 512     if (!eventHandler)
 513         eventHandler = new FGEventHandler();
 514
 515     sgUserDataInit( globals->get_props() );
 516
 517     _classicalRenderer = !fgGetBool("/sim/rendering/rembrandt/enabled", false);
 518     _shadowMapSize    = fgGetInt( "/sim/rendering/shadows/map-size", 4096 );
 519     addChangeListener( new ShadowMapSizeListener, "/sim/rendering/shadows/map-size" );
 520     addChangeListener( new ShadowEnabledListener, "/sim/rendering/shadows/enabled" );
 521     ShadowRangeListener* srl = new ShadowRangeListener;
 522     addChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[0]");
 523     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[1]");
 524     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[2]");
 525     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[3]");
 526     addChangeListener(new ShadowNumListener, "/sim/rendering/shadows/num-cascades");
 527     _numCascades = fgGetInt("/sim/rendering/shadows/num-cascades", 4);
 528     _cascadeFar[0] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[0]", 5.0f);
 529     _cascadeFar[1] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[1]", 50.0f);
 530     _cascadeFar[2] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[2]", 500.0f);
 531     _cascadeFar[3] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[3]", 5000.0f);
 532     updateCascadeNumber(_numCascades);
 533     updateCascadeFar(0, _cascadeFar[0]);
 534     updateCascadeFar(1, _cascadeFar[1]);
 535     updateCascadeFar(2, _cascadeFar[2]);
 536     updateCascadeFar(3, _cascadeFar[3]);
 537     _useColorForDepth = fgGetBool( "/sim/rendering/rembrandt/use-color-for-depth", false );
 538     _depthInColor->set( _useColorForDepth );
 539
 540     _renderer         = fgGetString("/sim/rendering/rembrandt/renderer", "default-pipeline");
 541     if (!_classicalRenderer)
 542         _pipeline = makeRenderingPipeline(_renderer, 0);
 543     _scenery_loaded   = fgGetNode("/sim/sceneryloaded", true);
 544     _position_finalized = fgGetNode("/sim/position-finalized", true);
 545
 546     _panel_hotspots   = fgGetNode("/sim/panel-hotspots", true);
 547     _virtual_cockpit  = fgGetNode("/sim/virtual-cockpit", true);
 548
 549     _sim_delta_sec = fgGetNode("/sim/time/delta-sec", true);
 550
 551     _xsize         = fgGetNode("/sim/startup/xsize", true);
 552     _ysize         = fgGetNode("/sim/startup/ysize", true);
 553     _splash_alpha  = fgGetNode("/sim/startup/splash-alpha", true);
 554
 555     _point_sprites        = fgGetNode("/sim/rendering/point-sprites", true);
 556     _enhanced_lighting    = fgGetNode("/sim/rendering/enhanced-lighting", true);
 557     _distance_attenuation = fgGetNode("/sim/rendering/distance-attenuation", true);
 558     _horizon_effect       = fgGetNode("/sim/rendering/horizon-effect", true);
 559
 560     _altitude_ft = fgGetNode("/position/altitude-ft", true);
 561
 562     _cloud_status = fgGetNode("/environment/clouds/status", true);
 563     _visibility_m = fgGetNode("/environment/visibility-m", true);
 564
 565     bool use_point_sprites = _point_sprites->getBoolValue();
 566     bool enhanced_lighting = _enhanced_lighting->getBoolValue();
 567     bool distance_attenuation = _distance_attenuation->getBoolValue();
 568
 569     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 570                                   distance_attenuation );
 571
 572     if (const char* tc = fgGetString("/sim/rendering/texture-compression", NULL)) {
 573       if (strcmp(tc, "false") == 0 || strcmp(tc, "off") == 0 ||
 574           strcmp(tc, "0") == 0 || strcmp(tc, "no") == 0 ||
 575           strcmp(tc, "none") == 0) {
 576         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::DoNotUseCompression);
 577       } else if (strcmp(tc, "arb") == 0) {
 578         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseARBCompression);
 579       } else if (strcmp(tc, "dxt1") == 0) {
 580         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT1Compression);
 581       } else if (strcmp(tc, "dxt3") == 0) {
 582         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT3Compression);
 583       } else if (strcmp(tc, "dxt5") == 0) {
 584         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT5Compression);
 585       } else {
 586         SG_LOG(SG_VIEW, SG_WARN, "Unknown texture compression setting!");
 587       }
 588     }
 589
 590 // create sky, but can't build until setupView, since we depend
 591 // on other subsystems to be inited, eg Ephemeris
 592     _sky = new SGSky;
 593
 594     SGPath texture_path(globals->get_fg_root());
 595     texture_path.append("Textures");
 596     texture_path.append("Sky");
 597     for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
 598         SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
 599         _sky->add_cloud_layer(layer);
 600     }
 601
 602     _sky->texture_path( texture_path.str() );
 603
 604     if (!_classicalRenderer) {
 605         eventHandler->setChangeStatsCameraRenderOrder( true );
 606     }
 607 }
 608
 609 void installCullVisitor(Camera* camera)
 610 {
 611     osgViewer::Renderer* renderer
 612         = static_cast<osgViewer::Renderer*>(camera->getRenderer());
 613     for (int i = 0; i < 2; ++i) {
 614         osgUtil::SceneView* sceneView = renderer->getSceneView(i);
 615
 616         osg::ref_ptr<osgUtil::CullVisitor::Identifier> identifier;
 617         identifier = sceneView->getCullVisitor()->getIdentifier();
 618         sceneView->setCullVisitor(new simgear::EffectCullVisitor);
 619         sceneView->getCullVisitor()->setIdentifier(identifier.get());
 620
 621         identifier = sceneView->getCullVisitorLeft()->getIdentifier();
 622         sceneView->setCullVisitorLeft(sceneView->getCullVisitor()->clone());
 623         sceneView->getCullVisitorLeft()->setIdentifier(identifier.get());
 624
 625         identifier = sceneView->getCullVisitorRight()->getIdentifier();
 626         sceneView->setCullVisitorRight(sceneView->getCullVisitor()->clone());
 627         sceneView->getCullVisitorRight()->setIdentifier(identifier.get());
 628
 629     }
 630 }
 631
 632 CameraInfo*
 633 FGRenderer::buildRenderingPipeline(CameraGroup* cgroup, unsigned flags, Camera* camera,
 634                                    const Matrix& view,
 635                                    const Matrix& projection,
 636                                                                    osg::GraphicsContext* gc,
 637                                    bool useMasterSceneData)
 638 {
 639         CameraInfo* info = 0;
 640         if (!_classicalRenderer && (flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0)
 641                 info = buildDeferredPipeline( cgroup, flags, camera, view, projection, gc );
 642
 643         if (info) {
 644                 return info;
 645         } else {
 646                 if ((flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0)
 647                         _classicalRenderer = true;
 648                 return buildClassicalPipeline( cgroup, flags, camera, view, projection, useMasterSceneData );
 649         }
 650 }
 651
 652 CameraInfo*
 653 FGRenderer::buildClassicalPipeline(CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
 654                                 const osg::Matrix& view,
 655                                 const osg::Matrix& projection,
 656                                 bool useMasterSceneData)
 657 {
 658     CameraInfo* info = new CameraInfo(flags);
 659     // The camera group will always update the camera
 660     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
 661     info->name = "classic";
 662
 663     Camera* farCamera = 0;
 664     if ((flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0) {
 665         farCamera = new Camera;
 666         farCamera->setName("farCamera");
 667         farCamera->setAllowEventFocus(camera->getAllowEventFocus());
 668         farCamera->setGraphicsContext(camera->getGraphicsContext());
 669         farCamera->setCullingMode(camera->getCullingMode());
 670         farCamera->setInheritanceMask(camera->getInheritanceMask());
 671         farCamera->setReferenceFrame(Transform::ABSOLUTE_RF);
 672         // Each camera's viewport is written when the window is
 673         // resized; if the the viewport isn't copied here, it gets updated
 674         // twice and ends up with the wrong value.
 675         farCamera->setViewport(simgear::clone(camera->getViewport()));
 676         farCamera->setDrawBuffer(camera->getDrawBuffer());
 677         farCamera->setReadBuffer(camera->getReadBuffer());
 678         farCamera->setRenderTargetImplementation(
 679             camera->getRenderTargetImplementation());
 680         const Camera::BufferAttachmentMap& bufferMap
 681             = camera->getBufferAttachmentMap();
 682         if (bufferMap.count(Camera::COLOR_BUFFER) != 0) {
 683             farCamera->attach(
 684                 Camera::COLOR_BUFFER,
 685                 bufferMap.find(Camera::COLOR_BUFFER)->second._texture.get());
 686         }
 687         cgroup->getViewer()->addSlave(farCamera, projection, view, useMasterSceneData);
 688         installCullVisitor(farCamera);
 689                 int farSlaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
 690                 info->addCamera( FAR_CAMERA, farCamera, farSlaveIndex );
 691         farCamera->setRenderOrder(Camera::POST_RENDER, farSlaveIndex);
 692         camera->setCullMask(camera->getCullMask() & ~simgear::BACKGROUND_BIT);
 693         camera->setClearMask(GL_DEPTH_BUFFER_BIT);
 694     }
 695     cgroup->getViewer()->addSlave(camera, projection, view, useMasterSceneData);
 696     installCullVisitor(camera);
 697     int slaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
 698     info->addCamera( MAIN_CAMERA, camera, slaveIndex );
 699     camera->setRenderOrder(Camera::POST_RENDER, slaveIndex);
 700     cgroup->addCamera(info);
 701     return info;
 702 }
 703
 704 class FGDeferredRenderingCameraCullCallback : public osg::NodeCallback {
 705 public:
 706     FGDeferredRenderingCameraCullCallback( const std::string& k, CameraInfo* i, bool nd = false ) : kind( k ), info( i ), needsDuDv(nd) {}
 707     virtual void operator()( osg::Node *n, osg::NodeVisitor *nv) {
 708         simgear::EffectCullVisitor* cv = dynamic_cast<simgear::EffectCullVisitor*>(nv);
 709         osg::Camera* camera = static_cast<osg::Camera*>(n);
 710
 711         cv->clearBufferList();
 712         for (RenderBufferMap::iterator ii = info->buffers.begin(); ii != info->buffers.end(); ++ii) {
 713             cv->addBuffer(ii->first, ii->second.texture);
 714         }
 715
 716         if ( !info->getRenderStageInfo(kind).fullscreen )
 717             info->setMatrices( camera );
 718
 719         if (needsDuDv) {
 720             osg::Matrix projInverse;
 721             info->projInverse->get( projInverse );
 722
 723             osg::Vec4 p0 = osg::Vec4( -1.0, -1.0, 0.0, 1.0 ) * projInverse;
 724             info->du->set( osg::Vec4(  1.0, -1.0, 0.0, 1.0 ) * projInverse - p0 );
 725             info->dv->set( osg::Vec4( -1.0,  1.0, 0.0, 1.0 ) * projInverse - p0 );
 726         }
 727
 728         cv->traverse( *camera );
 729
 730         if ( kind == GEOMETRY_CAMERA ) {
 731             // Remove transparent bins. They will be renderer in the additional light stage (side effect)
 732             osgUtil::RenderStage* renderStage = cv->getRenderStage();
 733             osgUtil::RenderBin::RenderBinList& rbl = renderStage->getRenderBinList();
 734             for (osgUtil::RenderBin::RenderBinList::iterator rbi = rbl.begin(); rbi != rbl.end(); ) {
 735                 if (rbi->second->getSortMode() == osgUtil::RenderBin::SORT_BACK_TO_FRONT) {
 736                     rbl.erase( rbi++ );
 737                 } else {
 738                     ++rbi;
 739                 }
 740             }
 741         } else if ( kind == LIGHTING_CAMERA ) {
 742             osg::ref_ptr<osg::Camera> mainShadowCamera = info->getCamera( SHADOW_CAMERA );
 743             if (mainShadowCamera.valid()) {
 744                 osg::Switch* grp = mainShadowCamera->getChild(0)->asSwitch();
 745                 for (int i = 0; i < 4; ++i ) {
 746                     if (!grp->getValue(i))
 747                         continue;
 748
 749                     osg::Camera* cascadeCam = static_cast<osg::Camera*>( grp->getChild(i) );
 750                     osg::Matrixf shadowMatrix = camera->getInverseViewMatrix() *
 751                                                 cascadeCam->getViewMatrix() *
 752                                                 cascadeCam->getProjectionMatrix() *
 753                                                 osg::Matrix::translate(1.0, 1.0, 1.0) *
 754                                                 osg::Matrix::scale(0.5f, 0.5f, 0.5f);
 755
 756                     info->shadowMatrix[i]->set( shadowMatrix );
 757                 }
 758             }
 759         }
 760     }
 761
 762 private:
 763     std::string kind;
 764     CameraInfo* info;
 765     bool needsDuDv;
 766 };
 767
 768 osg::Texture2D* buildDeferredBuffer(GLint internalFormat, GLenum sourceFormat, GLenum sourceType, GLenum wrapMode, bool shadowComparison = false)
 769 {
 770     osg::Texture2D* tex = new osg::Texture2D;
 771     tex->setResizeNonPowerOfTwoHint( false );
 772     tex->setInternalFormat( internalFormat );
 773     tex->setShadowComparison(shadowComparison);
 774     if (shadowComparison) {
 775         tex->setShadowTextureMode(osg::Texture2D::LUMINANCE);
 776         tex->setBorderColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
 777     }
 778     tex->setSourceFormat(sourceFormat);
 779     tex->setSourceType(sourceType);
 780     tex->setFilter( osg::Texture2D::MIN_FILTER, osg::Texture2D::LINEAR );
 781     tex->setFilter( osg::Texture2D::MAG_FILTER, osg::Texture2D::LINEAR );
 782     tex->setWrap( osg::Texture::WRAP_S, (osg::Texture::WrapMode)wrapMode );
 783     tex->setWrap( osg::Texture::WRAP_T, (osg::Texture::WrapMode)wrapMode );
 784         return tex;
 785 }
 786
 787 void attachBufferToCamera( CameraInfo* info, osg::Camera* camera, osg::Camera::BufferComponent c, const std::string& ck, const std::string& bk )
 788 {
 789     camera->attach( c, info->getBuffer(bk) );
 790     info->getRenderStageInfo(ck).buffers.insert( std::make_pair( c, bk ) );
 791 }
 792
 793 void buildAttachments(CameraInfo* info, osg::Camera* camera, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments) {
 794     BOOST_FOREACH(ref_ptr<FGRenderingPipeline::Attachment> attachment, attachments) {
 795         if (attachment->valid())
 796             attachBufferToCamera( info, camera, attachment->component, name, attachment->buffer );
 797     }
 798 }
 799
 800 osg::Camera* FGRenderer::buildDeferredGeometryCamera( CameraInfo* info, osg::GraphicsContext* gc, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments )
 801 {
 802     osg::Camera* camera = new osg::Camera;
 803     info->addCamera(name, camera );
 804
 805     camera->setCullMask( ~simgear::MODELLIGHT_BIT );
 806     camera->setName( "GeometryC" );
 807     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
 808     camera->setGraphicsContext( gc );
 809     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( name, info ) );
 810     camera->setClearMask( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
 811     camera->setClearColor( osg::Vec4( 0., 0., 0., 0. ) );
 812     camera->setClearDepth( 1.0 );
 813     camera->setColorMask(true, true, true, true);
 814     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
 815     camera->setRenderOrder(osg::Camera::NESTED_RENDER, 0);
 816     camera->setViewport( new osg::Viewport );
 817     buildAttachments(info, camera, name, attachments);
 818     camera->setDrawBuffer(GL_FRONT);
 819     camera->setReadBuffer(GL_FRONT);
 820
 821     osg::StateSet* ss = camera->getOrCreateStateSet();
 822     ss->addUniform( _depthInColor );
 823
 824     camera->addChild( _deferredRealRoot.get() );
 825
 826     return camera;
 827 }
 828
 829 static void setShadowCascadeStateSet( osg::Camera* cam ) {
 830     osg::StateSet* ss = cam->getOrCreateStateSet();
 831     ss->setAttribute( new osg::PolygonOffset( 1.1f, 5.0f ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 832     ss->setMode( GL_POLYGON_OFFSET_FILL, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 833     ss->setRenderBinDetails( 0, "RenderBin", osg::StateSet::OVERRIDE_RENDERBIN_DETAILS );
 834     ss->setAttributeAndModes( new osg::AlphaFunc( osg::AlphaFunc::GREATER, 0.05 ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 835     ss->setAttributeAndModes( new osg::ColorMask( false, false, false, false ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 836     ss->setAttributeAndModes( new osg::CullFace( osg::CullFace::FRONT ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 837     osg::Program* program = new osg::Program;
 838     ss->setAttribute( program, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON );
 839     ss->setMode( GL_LIGHTING, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 840     ss->setMode( GL_BLEND, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 841     //ss->setTextureMode( 0, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON );
 842     ss->setTextureMode( 0, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 843     ss->setTextureMode( 1, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 844     ss->setTextureMode( 1, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 845     ss->setTextureMode( 2, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 846     ss->setTextureMode( 2, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 847 }
 848
 849 static osg::Camera* createShadowCascadeCamera( int no, int cascadeSize ) {
 850     osg::Camera* cascadeCam = new osg::Camera;
 851     setShadowCascadeStateSet( cascadeCam );
 852
 853     std::ostringstream oss;
 854     oss << "CascadeCamera" << (no + 1);
 855     cascadeCam->setName( oss.str() );
 856     cascadeCam->setClearMask(0);
 857     cascadeCam->setCullMask( simgear::CASTSHADOW_BIT );
 858     cascadeCam->setCullingMode( cascadeCam->getCullingMode() | osg::CullSettings::SMALL_FEATURE_CULLING );
 859     cascadeCam->setAllowEventFocus(false);
 860     cascadeCam->setReferenceFrame(osg::Transform::ABSOLUTE_RF_INHERIT_VIEWPOINT);
 861     cascadeCam->setRenderOrder(osg::Camera::NESTED_RENDER);
 862     cascadeCam->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 863     cascadeCam->setViewport( int( no / 2 ) * cascadeSize, (no & 1) * cascadeSize, cascadeSize, cascadeSize );
 864     return cascadeCam;
 865 }
 866
 867 osg::Camera* FGRenderer::buildDeferredShadowCamera( CameraInfo* info, osg::GraphicsContext* gc, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments )
 868 {
 869     osg::Camera* mainShadowCamera = new osg::Camera;
 870     info->addCamera(name, mainShadowCamera, 0.0f );
 871
 872     mainShadowCamera->setName( "ShadowC" );
 873     mainShadowCamera->setClearMask( GL_DEPTH_BUFFER_BIT );
 874     mainShadowCamera->setClearDepth( 1.0 );
 875     mainShadowCamera->setAllowEventFocus(false);
 876     mainShadowCamera->setGraphicsContext(gc);
 877     mainShadowCamera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
 878     buildAttachments(info, mainShadowCamera, name, attachments);
 879     mainShadowCamera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
 880     mainShadowCamera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
 881     mainShadowCamera->setProjectionMatrix(osg::Matrix::identity());
 882     mainShadowCamera->setCullingMode( osg::CullSettings::NO_CULLING );
 883     mainShadowCamera->setViewport( 0, 0, _shadowMapSize, _shadowMapSize );
 884     mainShadowCamera->setDrawBuffer(GL_FRONT);
 885     mainShadowCamera->setReadBuffer(GL_FRONT);
 886     mainShadowCamera->setRenderOrder(Camera::NESTED_RENDER, 1);
 887
 888     osg::Switch* shadowSwitch = new osg::Switch;
 889     mainShadowCamera->addChild( shadowSwitch );
 890
 891     for (int i = 0; i < 4; ++i ) {
 892         osg::Camera* cascadeCam = createShadowCascadeCamera( i, _shadowMapSize/2 );
 893         cascadeCam->addChild( _deferredRealRoot.get() );
 894         shadowSwitch->addChild( cascadeCam );
 895     }
 896     if (fgGetBool("/sim/rendering/shadows/enabled", true))
 897         shadowSwitch->setAllChildrenOn();
 898     else
 899         shadowSwitch->setAllChildrenOff();
 900
 901     return mainShadowCamera;
 902 }
 903
 904 void FGRenderer::updateShadowCascade(const CameraInfo* info, osg::Camera* camera, osg::Group* grp, int idx, double left, double right, double bottom, double top, double zNear, double f1, double f2)
 905 {
 906     osg::Camera* cascade = static_cast<osg::Camera*>( grp->getChild(idx) );
 907     osg::Matrixd &viewMatrix = cascade->getViewMatrix();
 908     osg::Matrixd &projectionMatrix = cascade->getProjectionMatrix();
 909
 910     osg::BoundingSphere bs;
 911     bs.expandBy(osg::Vec3(left,bottom,-zNear) * f1);
 912     bs.expandBy(osg::Vec3(right,top,-zNear) * f2);
 913     bs.expandBy(osg::Vec3(left,bottom,-zNear) * f2);
 914     bs.expandBy(osg::Vec3(right,top,-zNear) * f1);
 915
 916     osg::Vec4 aim = osg::Vec4(bs.center(), 1.0) * camera->getInverseViewMatrix();
 917
 918     projectionMatrix.makeOrtho( -bs.radius(), bs.radius(), -bs.radius(), bs.radius(), 1., 15000.0 );
 919     osg::Vec3 position( aim.x(), aim.y(), aim.z() );
 920     viewMatrix.makeLookAt( position + (getSunDirection() * 10000.0), position, position );
 921 }
 922
 923 osg::Vec3 FGRenderer::getSunDirection() const
 924 {
 925     osg::Vec3 val;
 926     _sunDirection->get( val );
 927     return val;
 928 }
 929
 930 void FGRenderer::updateShadowCamera(const CameraInfo* info, const osg::Vec3d& position)
 931 {
 932     ref_ptr<Camera> mainShadowCamera = info->getCamera( SHADOW_CAMERA );
 933     if (mainShadowCamera.valid()) {
 934         ref_ptr<Switch> shadowSwitch = mainShadowCamera->getChild( 0 )->asSwitch();
 935         osg::Vec3d up = position,
 936             dir = getSunDirection();
 937         up.normalize();
 938         dir.normalize();
 939         // cos(100 deg) == -0.17
 940         if (up * dir < -0.17 || !fgGetBool("/sim/rendering/shadows/enabled", true)) {
 941             shadowSwitch->setAllChildrenOff();
 942         } else {
 943             double left,right,bottom,top,zNear,zFar;
 944             ref_ptr<Camera> camera = info->getCamera(GEOMETRY_CAMERA);
 945             camera->getProjectionMatrix().getFrustum(left,right,bottom,top,zNear,zFar);
 946
 947             shadowSwitch->setAllChildrenOn();
 948             if (_numCascades == 1) {
 949                 osg::Camera* cascadeCam = static_cast<osg::Camera*>( shadowSwitch->getChild(0) );
 950                 cascadeCam->setViewport( 0, 0, _shadowMapSize, _shadowMapSize );
 951             } else {
 952                 for (int no = 0; no < 4; ++no) {
 953                     osg::Camera* cascadeCam = static_cast<osg::Camera*>( shadowSwitch->getChild(no) );
 954                     cascadeCam->setViewport( int( no / 2 ) * (_shadowMapSize/2), (no & 1) * (_shadowMapSize/2), (_shadowMapSize/2), (_shadowMapSize/2) );
 955                 }
 956             }
 957             updateShadowCascade(info, camera, shadowSwitch, 0, left, right, bottom, top, zNear, 1.0, _cascadeFar[0]/zNear);
 958             if (_numCascades > 1) {
 959                 shadowSwitch->setValue(1, true);
 960                 updateShadowCascade(info, camera, shadowSwitch, 1, left, right, bottom, top, zNear, _cascadeFar[0]/zNear, _cascadeFar[1]/zNear);
 961             } else {
 962                 shadowSwitch->setValue(1, false);
 963             }
 964             if (_numCascades > 2) {
 965                 shadowSwitch->setValue(2, true);
 966                 updateShadowCascade(info, camera, shadowSwitch, 2, left, right, bottom, top, zNear, _cascadeFar[1]/zNear, _cascadeFar[2]/zNear);
 967             } else {
 968                 shadowSwitch->setValue(2, false);
 969             }
 970             if (_numCascades > 3) {
 971                 shadowSwitch->setValue(3, true);
 972                 updateShadowCascade(info, camera, shadowSwitch, 3, left, right, bottom, top, zNear, _cascadeFar[2]/zNear, _cascadeFar[3]/zNear);
 973             } else {
 974                 shadowSwitch->setValue(3, false);
 975             }
 976             {
 977             osg::Matrixd &viewMatrix = mainShadowCamera->getViewMatrix();
 978
 979             osg::Vec4 aim = osg::Vec4( 0.0, 0.0, 0.0, 1.0 ) * camera->getInverseViewMatrix();
 980
 981             osg::Vec3 position( aim.x(), aim.y(), aim.z() );
 982             viewMatrix.makeLookAt( position, position + (getSunDirection() * 10000.0), position );
 983             }
 984         }
 985     }
 986 }
 987
 988 void FGRenderer::updateShadowMapSize(int mapSize)
 989 {
 990     if ( ((~( mapSize-1 )) & mapSize) != mapSize ) {
 991         SG_LOG( SG_VIEW, SG_ALERT, "Map size is not a power of two" );
 992         return;
 993     }
 994     for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
 995             ii != CameraGroup::getDefault()->camerasEnd();
 996             ++ii )
 997     {
 998         CameraInfo* info = ii->get();
 999         Camera* camera = info->getCamera(SHADOW_CAMERA);
1000         if (camera == 0) continue;
1001
1002         Texture2D* tex = info->getBuffer("shadow");
1003         if (tex == 0) continue;
1004
1005         tex->setTextureSize( mapSize, mapSize );
1006         tex->dirtyTextureObject();
1007
1008         Viewport* vp = camera->getViewport();
1009         vp->width() = mapSize;
1010         vp->height() = mapSize;
1011
1012         osgViewer::Renderer* renderer
1013             = static_cast<osgViewer::Renderer*>(camera->getRenderer());
1014         for (int i = 0; i < 2; ++i) {
1015             osgUtil::SceneView* sceneView = renderer->getSceneView(i);
1016             sceneView->getRenderStage()->setFrameBufferObject(0);
1017             sceneView->getRenderStage()->setCameraRequiresSetUp(true);
1018             if (sceneView->getRenderStageLeft()) {
1019                 sceneView->getRenderStageLeft()->setFrameBufferObject(0);
1020                 sceneView->getRenderStageLeft()->setCameraRequiresSetUp(true);
1021             }
1022             if (sceneView->getRenderStageRight()) {
1023                 sceneView->getRenderStageRight()->setFrameBufferObject(0);
1024                 sceneView->getRenderStageRight()->setCameraRequiresSetUp(true);
1025             }
1026         }
1027
1028         int cascadeSize = mapSize / 2;
1029         Group* grp = camera->getChild(0)->asGroup();
1030         for (int i = 0; i < 4; ++i ) {
1031             Camera* cascadeCam = static_cast<Camera*>( grp->getChild(i) );
1032             cascadeCam->setViewport( int( i / 2 ) * cascadeSize, (i & 1) * cascadeSize, cascadeSize, cascadeSize );
1033         }
1034
1035         _shadowMapSize = mapSize;
1036     }
1037 }
1038
1039 void FGRenderer::enableShadows(bool enabled)
1040 {
1041     for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
1042             ii != CameraGroup::getDefault()->camerasEnd();
1043             ++ii )
1044     {
1045         CameraInfo* info = ii->get();
1046         Camera* camera = info->getCamera(SHADOW_CAMERA);
1047         if (camera == 0) continue;
1048
1049         osg::Switch* shadowSwitch = camera->getChild(0)->asSwitch();
1050         if (enabled)
1051             shadowSwitch->setAllChildrenOn();
1052         else
1053             shadowSwitch->setAllChildrenOff();
1054     }
1055 }
1056
1057 void FGRenderer::updateCascadeFar(int index, float far_m)
1058 {
1059     if (index < 0 || index > 3)
1060         return;
1061     _cascadeFar[index] = far_m;
1062     _shadowDistances->set( osg::Vec4f(_cascadeFar[0], _cascadeFar[1], _cascadeFar[2], _cascadeFar[3]) );
1063 }
1064
1065 void FGRenderer::updateCascadeNumber(size_t num)
1066 {
1067     if (num < 1 || num > 4)
1068         return;
1069     _numCascades = num;
1070     _shadowNumber->set( (int)_numCascades );
1071 }
1072
1073 class DebugPassListener : public SGPropertyChangeListener {
1074 public:
1075     DebugPassListener(osg::Switch* sw, int i) : _switch(sw), _index(i) {}
1076     virtual void valueChanged(SGPropertyNode* node) {
1077         _switch->setValue(_index, node->getBoolValue());
1078     }
1079
1080 private:
1081     osg::ref_ptr<osg::Switch> _switch;
1082     int _index;
1083 };
1084
1085 osg::Camera*
1086 FGRenderer::buildDeferredLightingCamera( flightgear::CameraInfo* info, osg::GraphicsContext* gc, const FGRenderingPipeline::Stage* stage )
1087 {
1088     osg::Camera* camera = new osg::Camera;
1089     info->addCamera(stage->name, camera );
1090
1091     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( stage->name, info ) );
1092     camera->setAllowEventFocus(false);
1093     camera->setGraphicsContext(gc);
1094     camera->setViewport(new Viewport);
1095     camera->setName(stage->name+"C");
1096     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1097     camera->setRenderOrder(osg::Camera::NESTED_RENDER, stage->orderNum);
1098     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1099     camera->setViewport( new osg::Viewport );
1100     buildAttachments(info, camera, stage->name, stage->attachments);
1101     camera->setDrawBuffer(GL_FRONT);
1102     camera->setReadBuffer(GL_FRONT);
1103     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1104     osg::StateSet* ss = camera->getOrCreateStateSet();
1105     ss->setAttribute( new osg::Depth(osg::Depth::LESS, 0.0, 1.0, false) );
1106     ss->addUniform( _depthInColor );
1107
1108     osg::Switch* lightingGroup = new osg::Switch;
1109
1110     BOOST_FOREACH( osg::ref_ptr<FGRenderingPipeline::Pass> pass, stage->passes ) {
1111         ref_ptr<Node> node = buildPass(info, pass);
1112         if (node.valid()) {
1113             lightingGroup->addChild(node);
1114             if (!pass->debugProperty.empty()) {
1115                 lightingGroup->setValue(lightingGroup->getNumChildren()-1, fgGetBool(pass->debugProperty));
1116                 fgAddChangeListener(new DebugPassListener(lightingGroup, lightingGroup->getNumChildren()-1), pass->debugProperty);
1117             }
1118         }
1119     }
1120
1121     camera->addChild( lightingGroup );
1122
1123     return camera;
1124 }
1125
1126 CameraInfo*
1127 FGRenderer::buildDeferredPipeline(CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
1128                                     const osg::Matrix& view,
1129                                     const osg::Matrix& projection,
1130                                     osg::GraphicsContext* gc)
1131 {
1132     return buildCameraFromRenderingPipeline(_pipeline, cgroup, flags, camera, view, projection, gc);
1133 }
1134
1135 osg::Camera*
1136 FGRenderer::buildDeferredFullscreenCamera( flightgear::CameraInfo* info, const FGRenderingPipeline::Pass* pass )
1137 {
1138     osg::Camera* camera = new osg::Camera;
1139
1140     camera->setClearMask( 0 );
1141     camera->setAllowEventFocus(false);
1142     camera->setName(pass->name+"C");
1143     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1144     camera->setRenderOrder(osg::Camera::NESTED_RENDER, pass->orderNum);
1145     camera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1146     camera->setViewMatrix(osg::Matrix::identity());
1147     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1148
1149     osg::StateSet* ss = camera->getOrCreateStateSet();
1150     ss->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1151     ss->addUniform( info->projInverse );
1152     ss->addUniform( info->viewInverse );
1153     ss->addUniform( info->view );
1154     ss->addUniform( info->bufferSize );
1155     ss->addUniform( info->worldPosCart );
1156     ss->addUniform( info->worldPosGeod );
1157     ss->addUniform( info->shadowMatrix[0] );
1158     ss->addUniform( info->shadowMatrix[1] );
1159     ss->addUniform( info->shadowMatrix[2] );
1160     ss->addUniform( info->shadowMatrix[3] );
1161     ss->addUniform( _ambientFactor );
1162     ss->addUniform( _sunDiffuse );
1163     ss->addUniform( _sunSpecular );
1164     ss->addUniform( _sunDirection );
1165     ss->addUniform( _planes );
1166     ss->addUniform( _shadowNumber );
1167     ss->addUniform( _shadowDistances );
1168     ss->addUniform( _fogColor );
1169     ss->addUniform( _fogDensity );
1170
1171     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1172     g->setUseDisplayList(false);
1173     simgear::EffectGeode* eg = new simgear::EffectGeode;
1174     osg::ref_ptr<SGReaderWriterOptions> opt;
1175     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1176     opt->setPropertyNode(globals->get_props());
1177     simgear::Effect* effect = simgear::makeEffect(pass->effect, true, opt.get());
1178     if (effect) {
1179         eg->setEffect( effect );
1180     }
1181
1182     eg->setName(pass->name+"Quad");
1183     eg->setCullingActive(false);
1184     eg->addDrawable(g);
1185     camera->addChild(eg);
1186
1187     return camera;
1188 }
1189
1190 osg::Camera*
1191 FGRenderer::buildDeferredFullscreenCamera( flightgear::CameraInfo* info, osg::GraphicsContext* gc, const FGRenderingPipeline::Stage* stage )
1192 {
1193     osg::Camera* camera = buildDeferredFullscreenCamera(info, static_cast<const FGRenderingPipeline::Pass*>(stage));
1194     info->addCamera(stage->name, camera, stage->scaleFactor, true);
1195
1196     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback(stage->name, info, stage->needsDuDv) );
1197     camera->setGraphicsContext(gc);
1198     camera->setViewport(new Viewport);
1199     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1200     buildAttachments(info, camera, stage->name, stage->attachments);
1201     camera->setDrawBuffer(GL_FRONT);
1202     camera->setReadBuffer(GL_FRONT);
1203     camera->setClearColor( osg::Vec4( 1., 1., 1., 1. ) );
1204     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1205     camera->setViewMatrix(osg::Matrix::identity());
1206     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1207
1208     osg::StateSet* ss = camera->getOrCreateStateSet();
1209     if (stage->needsDuDv) {
1210         ss->addUniform( info->du );
1211         ss->addUniform( info->dv );
1212     }
1213
1214     return camera;
1215 }
1216
1217 void
1218 FGRenderer::buildDeferredDisplayCamera( osg::Camera* camera, flightgear::CameraInfo* info, const FGRenderingPipeline::Stage* stage, osg::GraphicsContext* gc )
1219 {
1220     camera->setName( "DisplayC" );
1221     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( stage->name, info ) );
1222     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
1223     camera->setAllowEventFocus(false);
1224     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1225     g->setUseDisplayList(false); //DEBUG
1226     simgear::EffectGeode* eg = new simgear::EffectGeode;
1227     osg::ref_ptr<SGReaderWriterOptions> opt;
1228     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1229     opt->setPropertyNode(globals->get_props());
1230     simgear::Effect* effect = simgear::makeEffect(stage->effect, true, opt.get());
1231     if (!effect) {
1232         SG_LOG(SG_VIEW, SG_ALERT, stage->effect + " not found");
1233         return;
1234     }
1235     eg->setEffect(effect);
1236     eg->setCullingActive(false);
1237     eg->addDrawable(g);
1238     camera->setViewMatrix(osg::Matrix::identity());
1239     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1240     camera->addChild(eg);
1241
1242     osg::StateSet* ss = camera->getOrCreateStateSet();
1243     ss->addUniform( _depthInColor );
1244     ss->addUniform( info->projInverse );
1245     ss->addUniform( info->viewInverse );
1246     ss->addUniform( info->view );
1247     ss->addUniform( info->bufferSize );
1248     ss->addUniform( info->worldPosCart );
1249     ss->addUniform( info->worldPosGeod );
1250     ss->addUniform( info->shadowMatrix[0] );
1251     ss->addUniform( info->shadowMatrix[1] );
1252     ss->addUniform( info->shadowMatrix[2] );
1253     ss->addUniform( info->shadowMatrix[3] );
1254     ss->addUniform( _ambientFactor );
1255     ss->addUniform( _sunDiffuse );
1256     ss->addUniform( _sunSpecular );
1257     ss->addUniform( _sunDirection );
1258     ss->addUniform( _planes );
1259     ss->addUniform( _shadowNumber );
1260     ss->addUniform( _shadowDistances );
1261     ss->addUniform( _fogColor );
1262     ss->addUniform( _fogDensity );
1263 }
1264
1265 void
1266 FGRenderer::buildStage(CameraInfo* info,
1267                         FGRenderingPipeline::Stage* stage,
1268                         CameraGroup* cgroup,
1269                         osg::Camera* mainCamera,
1270                         const osg::Matrix& view, const osg::Matrix& projection, osg::GraphicsContext* gc)
1271 {
1272     if (!stage->valid())
1273         return;
1274
1275     ref_ptr<Camera> camera;
1276     bool needOffsets = false;
1277     if (stage->type == "geometry") {
1278         camera = buildDeferredGeometryCamera(info, gc, stage->name, stage->attachments);
1279         needOffsets = true;
1280     } else if (stage->type == "lighting") {
1281         camera = buildDeferredLightingCamera(info, gc, stage);
1282         needOffsets = true;
1283     } else if (stage->type == "shadow")
1284         camera = buildDeferredShadowCamera(info, gc, stage->name, stage->attachments);
1285     else if (stage->type == "fullscreen")
1286         camera = buildDeferredFullscreenCamera(info, gc, stage);
1287     else if (stage->type == "display") {
1288         camera = mainCamera;
1289         buildDeferredDisplayCamera(camera, info, stage, gc);
1290     } else
1291         throw sg_exception("Stage type is not supported");
1292
1293     if (needOffsets)
1294         cgroup->getViewer()->addSlave(camera, projection, view, false);
1295     else
1296         cgroup->getViewer()->addSlave(camera, false);
1297     installCullVisitor(camera);
1298     int slaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
1299     if (stage->type == "display")
1300         info->addCamera( stage->type, camera, slaveIndex, true );
1301     info->getRenderStageInfo(stage->name).slaveIndex = slaveIndex;
1302 }
1303
1304 osg::Node*
1305 FGRenderer::buildLightingSkyCloudsPass(FGRenderingPipeline::Pass* pass)
1306 {
1307     Group* group = new Group;
1308     group->setName("skyCloudsGroup");
1309     group->setNodeMask(simgear::BACKGROUND_BIT);
1310
1311     StateSet* ss = group->getOrCreateStateSet();
1312     ss->setAttributeAndModes( new osg::ColorMask( true, true, true, false ), osg::StateAttribute::ON );
1313     group->addChild( _sky->getPreRoot() );
1314     group->addChild( _sky->getCloudRoot() );
1315     return group;
1316 }
1317
1318 osg::Node*
1319 FGRenderer::buildLightingLightsPass(CameraInfo* info, FGRenderingPipeline::Pass* pass)
1320 {
1321     osg::Camera* lightCam = new osg::Camera;
1322     StateSet* ss = lightCam->getOrCreateStateSet();
1323     ss->addUniform( _planes );
1324     ss->addUniform( info->bufferSize );
1325     ss->addUniform( _fogColor );
1326     ss->addUniform( _fogDensity );
1327     lightCam->setName( "LightCamera" );
1328     lightCam->setClearMask(0);
1329     lightCam->setAllowEventFocus(false);
1330     lightCam->setReferenceFrame(osg::Transform::RELATIVE_RF);
1331     lightCam->setRenderOrder(osg::Camera::NESTED_RENDER,pass->orderNum);
1332     lightCam->setViewMatrix(osg::Matrix::identity());
1333     lightCam->setProjectionMatrix(osg::Matrix::identity());
1334     lightCam->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1335     lightCam->setCullMask( simgear::MODELLIGHT_BIT | simgear::PANEL2D_BIT | simgear::PERMANENTLIGHT_BIT);
1336     lightCam->setInheritanceMask( osg::CullSettings::ALL_VARIABLES & ~osg::CullSettings::CULL_MASK );
1337     lightCam->addChild( _deferredRealRoot.get() );
1338
1339     return lightCam;
1340 }
1341
1342 osg::Node*
1343 FGRenderer::buildPass(CameraInfo* info, FGRenderingPipeline::Pass* pass)
1344 {
1345     if (!pass->valid())
1346         return 0;
1347
1348     ref_ptr<Node> node;
1349     if (pass->type == "sky-clouds")
1350         node = buildLightingSkyCloudsPass(pass);
1351     else if (pass->type == "fullscreen")
1352         node = buildDeferredFullscreenCamera(info, pass);
1353     else if (pass->type == "lights")
1354         node = buildLightingLightsPass(info, pass);
1355     else
1356         throw sg_exception("Pass type is not supported");
1357
1358     return node.release();
1359 }
1360
1361 void
1362 FGRenderer::buildBuffers(FGRenderingPipeline* rpipe, CameraInfo* info)
1363 {
1364     for (size_t i = 0; i < rpipe->buffers.size(); ++i) {
1365         osg::ref_ptr<FGRenderingPipeline::Buffer> buffer = rpipe->buffers[i];
1366         if (buffer->valid()) {
1367             bool fullscreen = buffer->width == -1 && buffer->height == -1;
1368             info->addBuffer(buffer->name, buildDeferredBuffer( buffer->internalFormat,
1369                                                                 buffer->sourceFormat,
1370                                                                 buffer->sourceType,
1371                                                                 buffer->wrapMode,
1372                                                                 buffer->shadowComparison),
1373                             fullscreen ? buffer->scaleFactor : 0.0f);
1374             if (!fullscreen) {
1375                 info->getBuffer(buffer->name)->setTextureSize(buffer->width, buffer->height);
1376             }
1377         }
1378     }
1379 }
1380
1381 CameraInfo* FGRenderer::buildCameraFromRenderingPipeline(FGRenderingPipeline* rpipe, CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
1382                                     const osg::Matrix& view, const osg::Matrix& projection, osg::GraphicsContext* gc)
1383 {
1384     CameraInfo* info = new CameraInfo(flags);
1385     buildBuffers(rpipe, info);
1386
1387     for (size_t i = 0; i < rpipe->stages.size(); ++i) {
1388         osg::ref_ptr<FGRenderingPipeline::Stage> stage = rpipe->stages[i];
1389         buildStage(info, stage, cgroup, camera, view, projection, gc);
1390     }
1391
1392     cgroup->addCamera(info);
1393
1394     return info;
1395 }
1396
1397 void FGRenderer::setupRoot()
1398 {
1399     osg::StateSet* stateSet = _root->getOrCreateStateSet();
1400
1401     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
1402
1403     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
1404     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1405
1406     stateSet->setAttribute(new osg::BlendFunc);
1407     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
1408
1409     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
1410
1411     // this will be set below
1412     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
1413
1414     osg::Material* material = new osg::Material;
1415     stateSet->setAttribute(material);
1416
1417     stateSet->setTextureAttribute(0, new osg::TexEnv);
1418     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
1419
1420     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
1421     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
1422     stateSet->setAttribute(hint);
1423     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
1424     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
1425     stateSet->setAttribute(hint);
1426     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
1427     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
1428     stateSet->setAttribute(hint);
1429     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
1430     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
1431     stateSet->setAttribute(hint);
1432     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
1433     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
1434     stateSet->setAttribute(hint);
1435 }
1436
1437 void
1438 FGRenderer::setupView( void )
1439 {
1440     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1441     osg::initNotifyLevel();
1442
1443     // The number of polygon-offset "units" to place between layers.  In
1444     // principle, one is supposed to be enough.  In practice, I find that
1445     // my hardware/driver requires many more.
1446     osg::PolygonOffset::setUnitsMultiplier(1);
1447     osg::PolygonOffset::setFactorMultiplier(1);
1448
1449     setupRoot();
1450
1451 // build the sky
1452     // The sun and moon diameters are scaled down numbers of the
1453     // actual diameters. This was needed to fit both the sun and the
1454     // moon within the distance to the far clip plane.
1455     // Moon diameter:    3,476 kilometers
1456     // Sun diameter: 1,390,000 kilometers
1457     osg::ref_ptr<SGReaderWriterOptions> opt;
1458     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1459     opt->setPropertyNode(globals->get_props());
1460     _sky->build( 80000.0, 80000.0,
1461                   463.3, 361.8,
1462                   *globals->get_ephem(),
1463                   fgGetNode("/environment", true),
1464                   opt.get());
1465
1466     viewer->getCamera()
1467         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1468
1469
1470     // need to update the light on every frame
1471     // OSG LightSource objects are rather confusing. OSG only supports
1472     // the 10 lights specified by OpenGL itself; if more than one
1473     // LightSource in the scene graph have the same light number, it's
1474     // indeterminate which values will be used to render geometry that
1475     // has that light number enabled. Also, adding children to a
1476     // LightSource is just a shortcut for setting up a state set that
1477     // has the corresponding OpenGL light enabled: a LightSource will
1478     // affect geometry anywhere in the scene graph that has its light
1479     // number enabled in a state set.
1480     osg::ref_ptr<LightSource> lightSource = new LightSource;
1481     lightSource->setName("FGLightSource");
1482     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
1483     // relative because of CameraView being just a clever transform node
1484     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
1485     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
1486     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
1487     _viewerSceneRoot->addChild(lightSource);
1488
1489     // we need a white diffuse light for the phase of the moon
1490     osg::ref_ptr<LightSource> sunLight = new osg::LightSource;
1491     sunLight->setName("sunLightSource");
1492     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
1493     sunLight->getLight()->setLightNum(1);
1494     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
1495     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
1496     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
1497
1498     // Hang a StateSet above the sky subgraph in order to turn off
1499     // light 0
1500     Group* skyGroup = _sky->getPreRoot();
1501     StateSet* skySS = skyGroup->getOrCreateStateSet();
1502     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
1503     sunLight->addChild(skyGroup);
1504
1505     if ( _classicalRenderer ) {
1506         _root->addChild(sunLight);
1507     }
1508
1509     osg::Group* sceneGroup = globals->get_scenery()->get_scene_graph();
1510     sceneGroup->setName("rendererScene");
1511     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
1512     _root->addChild(sceneGroup);
1513
1514     // setup state-set for main scenery (including models and aircraft)
1515     osg::StateSet* stateSet = sceneGroup->getOrCreateStateSet();
1516     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
1517     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
1518
1519     // enable disable specular highlights.
1520     // is the place where we might plug in an other fragment shader ...
1521     osg::LightModel* lightModel = new osg::LightModel;
1522     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
1523     stateSet->setAttribute(lightModel);
1524
1525     // switch to enable wireframe
1526     osg::PolygonMode* polygonMode = new osg::PolygonMode;
1527     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
1528     stateSet->setAttributeAndModes(polygonMode);
1529
1530     // scene fog handling
1531     osg::Fog* fog = new osg::Fog;
1532     fog->setUpdateCallback(new FGFogUpdateCallback);
1533     stateSet->setAttributeAndModes(fog);
1534     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
1535
1536     // plug in the GUI
1537     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
1538     if (guiCamera) {
1539       osg::Geode* geode = new osg::Geode;
1540       geode->addDrawable(new SGHUDDrawable);
1541       geode->addDrawable(new SGPuDrawable);
1542
1543       // Draw first (eg. before Canvas GUI)
1544       guiCamera->insertChild(0, geode);
1545       guiCamera->insertChild(0, FGPanelNode::create2DPanelNode());
1546     }
1547
1548     osg::Switch* sw = new osg::Switch;
1549     sw->setName("scenerySwitch");
1550     sw->setUpdateCallback(new FGScenerySwitchCallback);
1551     sw->addChild(_root.get());
1552     _viewerSceneRoot->addChild(sw);
1553     // The clouds are attached directly to the scene graph root
1554     // because, in theory, they don't want the same default state set
1555     // as the rest of the scene. This may not be true in practice.
1556     if ( _classicalRenderer ) {
1557       _viewerSceneRoot->addChild(_sky->getCloudRoot());
1558       _viewerSceneRoot->addChild(FGCreateRedoutNode());
1559     }
1560
1561     // Attach empty program to the scene root so that shader programs
1562     // don't leak into state sets (effects) that shouldn't have one.
1563     stateSet = _viewerSceneRoot->getOrCreateStateSet();
1564     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
1565
1566     if ( !_classicalRenderer ) {
1567         _deferredRealRoot->addChild( _viewerSceneRoot.get() );
1568     }
1569 }
1570
1571 // Update all Visuals (redraws anything graphics related)
1572 void
1573 FGRenderer::update( ) {
1574     if (!_position_finalized || !_scenery_loaded->getBoolValue())
1575     {
1576         _splash_alpha->setDoubleValue(1.0);
1577         return;
1578     }
1579     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1580
1581     if (_splash_alpha->getDoubleValue()>0.0)
1582     {
1583         // Fade out the splash screen
1584         const double fade_time = 0.5;
1585         const double fade_steps_per_sec = 10;
1586         double delay_time = SGMiscd::min(fade_time/fade_steps_per_sec,
1587                                          (SGTimeStamp::now() - _splash_time).toSecs());
1588         _splash_time = SGTimeStamp::now();
1589         double sAlpha = _splash_alpha->getDoubleValue();
1590         sAlpha -= SGMiscd::max(0.0,delay_time/fade_time);
1591         FGScenerySwitchCallback::scenery_enabled = (sAlpha<1.0);
1592         _splash_alpha->setDoubleValue((sAlpha < 0) ? 0.0 : sAlpha);
1593
1594         syncPausePopupState();
1595     }
1596
1597     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
1598         if (!_classicalRenderer ) {
1599                 _ambientFactor->set( toOsg(l->scene_ambient()) );
1600                 _sunDiffuse->set( toOsg(l->scene_diffuse()) );
1601                 _sunSpecular->set( toOsg(l->scene_specular()) );
1602                 _sunDirection->set( osg::Vec3f(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]) );
1603         }
1604
1605     // update fog params
1606     double actual_visibility;
1607     if (_cloud_status->getBoolValue()) {
1608         actual_visibility = _sky->get_visibility();
1609     } else {
1610         actual_visibility = _visibility_m->getDoubleValue();
1611     }
1612
1613     // idle_state is now 1000 meaning we've finished all our
1614     // initializations and are running the main loop, so this will
1615     // now work without seg faulting the system.
1616
1617     FGViewer *current__view = globals->get_current_view();
1618     // Force update of center dependent values ...
1619     current__view->set_dirty();
1620
1621     osg::Camera *camera = viewer->getCamera();
1622
1623     osg::Vec4 clear_color = _altitude_ft->getDoubleValue() < 250000
1624                           ? toOsg(l->adj_fog_color())
1625                           // skydome ends at ~262000ft (default rendering)
1626                           // ~328000 ft (ALS) and would produce a strange
1627                           // looking greyish space -> black looks much
1628                           // better :-)
1629                           : osg::Vec4(0, 0, 0, 1);
1630     camera->setClearColor(clear_color);
1631
1632     updateSky();
1633
1634     // need to call the update visitor once
1635     _frameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
1636     _updateVisitor->setViewData(current__view->getViewPosition(),
1637                                 current__view->getViewOrientation());
1638     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
1639     _updateVisitor->setLight(direction, l->scene_ambient(),
1640                              l->scene_diffuse(), l->scene_specular(),
1641                              l->adj_fog_color(),
1642                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
1643     _updateVisitor->setVisibility(actual_visibility);
1644     simgear::GroundLightManager::instance()->update(_updateVisitor.get());
1645     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
1646     cullMask |= simgear::GroundLightManager::instance()
1647         ->getLightNodeMask(_updateVisitor.get());
1648     if (_panel_hotspots->getBoolValue())
1649         cullMask |= simgear::PICK_BIT;
1650     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
1651         if ( !_classicalRenderer ) {
1652                 _fogColor->set( toOsg( l->adj_fog_color() ) );
1653                 _fogDensity->set( float( _updateVisitor->getFogExp2Density() ) );
1654         }
1655 }
1656
1657 void
1658 FGRenderer::updateSky()
1659 {
1660     // update fog params if visibility has changed
1661     double visibility_meters = _visibility_m->getDoubleValue();
1662     _sky->set_visibility(visibility_meters);
1663
1664     double altitude_m = _altitude_ft->getDoubleValue() * SG_FEET_TO_METER;
1665     _sky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
1666
1667     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
1668
1669     // The sun and moon distances are scaled down versions
1670     // of the actual distance to get both the moon and the sun
1671     // within the range of the far clip plane.
1672     // Moon distance:    384,467 kilometers
1673     // Sun distance: 150,000,000 kilometers
1674
1675     double sun_horiz_eff, moon_horiz_eff;
1676     if (_horizon_effect->getBoolValue()) {
1677         sun_horiz_eff
1678         = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
1679                                      0.0),
1680                      0.33) / 3.0;
1681         moon_horiz_eff
1682         = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
1683                                      0.0),
1684                      0.33)/3.0;
1685     } else {
1686         sun_horiz_eff = moon_horiz_eff = 1.0;
1687     }
1688
1689     SGSkyState sstate;
1690     sstate.pos       = globals->get_current_view()->getViewPosition();
1691     sstate.pos_geod  = globals->get_current_view()->getPosition();
1692     sstate.ori       = globals->get_current_view()->getViewOrientation();
1693     sstate.spin      = l->get_sun_rotation();
1694     sstate.gst       = globals->get_time_params()->getGst();
1695     sstate.sun_dist  = 50000.0 * sun_horiz_eff;
1696     sstate.moon_dist = 40000.0 * moon_horiz_eff;
1697     sstate.sun_angle = l->get_sun_angle();
1698
1699     SGSkyColor scolor;
1700     scolor.sky_color   = SGVec3f(l->sky_color().data());
1701     scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
1702     scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
1703     scolor.cloud_color = SGVec3f(l->cloud_color().data());
1704     scolor.sun_angle   = l->get_sun_angle();
1705     scolor.moon_angle  = l->get_moon_angle();
1706
1707     double delta_time_sec = _sim_delta_sec->getDoubleValue();
1708     _sky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
1709     _sky->repaint( scolor, *globals->get_ephem() );
1710 }
1711
1712 void
1713 FGRenderer::resize( int width, int height )
1714 {
1715     int curWidth = _xsize->getIntValue(),
1716         curHeight = _ysize->getIntValue();
1717     SG_LOG(SG_VIEW, SG_DEBUG, "FGRenderer::resize: new size " << width << " x " << height);
1718     if ((curHeight != height) || (curWidth != width)) {
1719     // must guard setting these, or PLIB-PUI fails with too many live interfaces
1720         _xsize->setIntValue(width);
1721         _ysize->setIntValue(height);
1722     }
1723 }
1724
1725 typedef osgUtil::LineSegmentIntersector::Intersection Intersection;
1726 SGVec2d uvFromIntersection(const Intersection& hit)
1727 {
1728   // Taken from http://trac.openscenegraph.org/projects/osg/browser/OpenSceneGraph/trunk/examples/osgmovie/osgmovie.cpp
1729
1730   osg::Drawable* drawable = hit.drawable.get();
1731   osg::Geometry* geometry = drawable ? drawable->asGeometry() : 0;
1732   osg::Vec3Array* vertices =
1733     geometry ? dynamic_cast<osg::Vec3Array*>(geometry->getVertexArray()) : 0;
1734
1735   if( !vertices )
1736   {
1737     SG_LOG(SG_INPUT, SG_WARN, "Unable to get vertices for intersection.");
1738     return SGVec2d(-9999,-9999);
1739   }
1740
1741   // get the vertex indices.
1742   const Intersection::IndexList& indices = hit.indexList;
1743   const Intersection::RatioList& ratios = hit.ratioList;
1744
1745   if( indices.size() != 3 || ratios.size() != 3 )
1746   {
1747     SG_LOG( SG_INPUT,
1748             SG_WARN,
1749             "Intersection has insufficient indices to work with." );
1750     return SGVec2d(-9999,-9999);
1751   }
1752
1753   unsigned int i1 = indices[0];
1754   unsigned int i2 = indices[1];
1755   unsigned int i3 = indices[2];
1756
1757   float r1 = ratios[0];
1758   float r2 = ratios[1];
1759   float r3 = ratios[2];
1760
1761   osg::Array* texcoords =
1762     (geometry->getNumTexCoordArrays() > 0) ? geometry->getTexCoordArray(0) : 0;
1763   osg::Vec2Array* texcoords_Vec2Array =
1764     dynamic_cast<osg::Vec2Array*>(texcoords);
1765
1766   if( !texcoords_Vec2Array )
1767   {
1768     SG_LOG(SG_INPUT, SG_WARN, "Unable to get texcoords for intersection.");
1769     return SGVec2d(-9999,-9999);
1770   }
1771
1772   // we have tex coord array so now we can compute the final tex coord at the
1773   // point of intersection.
1774   osg::Vec2 tc1 = (*texcoords_Vec2Array)[i1];
1775   osg::Vec2 tc2 = (*texcoords_Vec2Array)[i2];
1776   osg::Vec2 tc3 = (*texcoords_Vec2Array)[i3];
1777
1778   return toSG( osg::Vec2d(tc1 * r1 + tc2 * r2 + tc3 * r3) );
1779 }
1780
1781 bool
1782 FGRenderer::pick(std::vector<SGSceneryPick>& pickList, const osg::Vec2& windowPos)
1783 {
1784     // wipe out the return ...
1785     pickList.clear();
1786     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
1787     Intersections intersections;
1788
1789     if (!computeIntersections(CameraGroup::getDefault(), windowPos, intersections))
1790         return false;
1791     for (Intersections::iterator hit = intersections.begin(),
1792              e = intersections.end();
1793          hit != e;
1794          ++hit) {
1795         const osg::NodePath& np = hit->nodePath;
1796         osg::NodePath::const_reverse_iterator npi;
1797
1798         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1799             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1800             if (!ud || (ud->getNumPickCallbacks() == 0))
1801                 continue;
1802
1803             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1804                 SGPickCallback* pickCallback = ud->getPickCallback(i);
1805                 if (!pickCallback)
1806                     continue;
1807                 SGSceneryPick sceneryPick;
1808                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
1809                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
1810
1811                 if( pickCallback->needsUV() )
1812                   sceneryPick.info.uv = uvFromIntersection(*hit);
1813
1814                 sceneryPick.callback = pickCallback;
1815                 pickList.push_back(sceneryPick);
1816             } // of installed pick callbacks iteration
1817         } // of reverse node path walk
1818     }
1819
1820     return !pickList.empty();
1821 }
1822
1823 void
1824 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
1825 {
1826     viewer = viewer_;
1827 }
1828
1829 void
1830 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
1831 {
1832     eventHandler = eventHandler_;
1833 }
1834
1835 void
1836 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
1837 {
1838     _viewerSceneRoot->addChild(camera);
1839 }
1840
1841 void
1842 FGRenderer::removeCamera(osg::Camera* camera)
1843 {
1844     _viewerSceneRoot->removeChild(camera);
1845 }
1846
1847 void
1848 FGRenderer::setPlanes( double zNear, double zFar )
1849 {
1850         _planes->set( osg::Vec3f( - zFar, - zFar * zNear, zFar - zNear ) );
1851 }
1852
1853 bool
1854 fgDumpSceneGraphToFile(const char* filename)
1855 {
1856     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1857     return osgDB::writeNodeFile(*viewer->getSceneData(), filename);
1858 }
1859
1860 bool
1861 fgDumpTerrainBranchToFile(const char* filename)
1862 {
1863     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
1864                                  filename );
1865 }
1866
1867 // For debugging
1868 bool
1869 fgDumpNodeToFile(osg::Node* node, const char* filename)
1870 {
1871     return osgDB::writeNodeFile(*node, filename);
1872 }
1873
1874 namespace flightgear
1875 {
1876 using namespace osg;
1877
1878 class VisibleSceneInfoVistor : public NodeVisitor, CullStack
1879 {
1880 public:
1881     VisibleSceneInfoVistor()
1882         : NodeVisitor(CULL_VISITOR, TRAVERSE_ACTIVE_CHILDREN)
1883     {
1884         setCullingMode(CullSettings::SMALL_FEATURE_CULLING
1885                        | CullSettings::VIEW_FRUSTUM_CULLING);
1886         setComputeNearFarMode(CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1887     }
1888
1889     VisibleSceneInfoVistor(const VisibleSceneInfoVistor& rhs)
1890     {
1891     }
1892
1893     META_NodeVisitor("flightgear","VisibleSceneInfoVistor")
1894
1895     typedef std::map<const std::string,int> InfoMap;
1896
1897     void getNodeInfo(Node* node)
1898     {
1899         const char* typeName = typeid(*node).name();
1900         classInfo[typeName]++;
1901         const std::string& nodeName = node->getName();
1902         if (!nodeName.empty())
1903             nodeInfo[nodeName]++;
1904     }
1905
1906     void dumpInfo()
1907     {
1908         using namespace std;
1909         typedef vector<InfoMap::iterator> FreqVector;
1910         cout << "class info:\n";
1911         FreqVector classes;
1912         for (InfoMap::iterator itr = classInfo.begin(), end = classInfo.end();
1913              itr != end;
1914              ++itr)
1915             classes.push_back(itr);
1916         sort(classes.begin(), classes.end(), freqComp);
1917         for (FreqVector::iterator itr = classes.begin(), end = classes.end();
1918              itr != end;
1919              ++itr) {
1920             cout << (*itr)->first << " " << (*itr)->second << "\n";
1921         }
1922         cout << "\nnode info:\n";
1923         FreqVector nodes;
1924         for (InfoMap::iterator itr = nodeInfo.begin(), end = nodeInfo.end();
1925              itr != end;
1926              ++itr)
1927             nodes.push_back(itr);
1928
1929         sort (nodes.begin(), nodes.end(), freqComp);
1930         for (FreqVector::iterator itr = nodes.begin(), end = nodes.end();
1931              itr != end;
1932              ++itr) {
1933             cout << (*itr)->first << " " << (*itr)->second << "\n";
1934         }
1935         cout << endl;
1936     }
1937
1938     void doTraversal(Camera* camera, Node* root, Viewport* viewport)
1939     {
1940         ref_ptr<RefMatrix> projection
1941             = createOrReuseMatrix(camera->getProjectionMatrix());
1942         ref_ptr<RefMatrix> mv = createOrReuseMatrix(camera->getViewMatrix());
1943         if (!viewport)
1944             viewport = camera->getViewport();
1945         if (viewport)
1946             pushViewport(viewport);
1947         pushProjectionMatrix(projection.get());
1948         pushModelViewMatrix(mv.get(), Transform::ABSOLUTE_RF);
1949         root->accept(*this);
1950         popModelViewMatrix();
1951         popProjectionMatrix();
1952         if (viewport)
1953             popViewport();
1954         dumpInfo();
1955     }
1956
1957     void apply(Node& node)
1958     {
1959         if (isCulled(node))
1960             return;
1961         pushCurrentMask();
1962         getNodeInfo(&node);
1963         traverse(node);
1964         popCurrentMask();
1965     }
1966     void apply(Group& node)
1967     {
1968         if (isCulled(node))
1969             return;
1970         pushCurrentMask();
1971         getNodeInfo(&node);
1972         traverse(node);
1973         popCurrentMask();
1974     }
1975
1976     void apply(Transform& node)
1977     {
1978         if (isCulled(node))
1979             return;
1980         pushCurrentMask();
1981         ref_ptr<RefMatrix> matrix = createOrReuseMatrix(*getModelViewMatrix());
1982         node.computeLocalToWorldMatrix(*matrix,this);
1983         pushModelViewMatrix(matrix.get(), node.getReferenceFrame());
1984         getNodeInfo(&node);
1985         traverse(node);
1986         popModelViewMatrix();
1987         popCurrentMask();
1988     }
1989
1990     void apply(Camera& camera)
1991     {
1992         // Save current cull settings
1993         CullSettings saved_cull_settings(*this);
1994
1995         // set cull settings from this Camera
1996         setCullSettings(camera);
1997         // inherit the settings from above
1998         inheritCullSettings(saved_cull_settings, camera.getInheritanceMask());
1999
2000         // set the cull mask.
2001         unsigned int savedTraversalMask = getTraversalMask();
2002         bool mustSetCullMask = (camera.getInheritanceMask()
2003                                 & osg::CullSettings::CULL_MASK) == 0;
2004         if (mustSetCullMask)
2005             setTraversalMask(camera.getCullMask());
2006
2007         osg::RefMatrix* projection = 0;
2008         osg::RefMatrix* modelview = 0;
2009
2010         if (camera.getReferenceFrame()==osg::Transform::RELATIVE_RF) {
2011             if (camera.getTransformOrder()==osg::Camera::POST_MULTIPLY) {
2012                 projection = createOrReuseMatrix(*getProjectionMatrix()
2013                                                  *camera.getProjectionMatrix());
2014                 modelview = createOrReuseMatrix(*getModelViewMatrix()
2015                                                 * camera.getViewMatrix());
2016             }
2017             else {              // pre multiply
2018                 projection = createOrReuseMatrix(camera.getProjectionMatrix()
2019                                                  * (*getProjectionMatrix()));
2020                 modelview = createOrReuseMatrix(camera.getViewMatrix()
2021                                                 * (*getModelViewMatrix()));
2022             }
2023         } else {
2024             // an absolute reference frame
2025             projection = createOrReuseMatrix(camera.getProjectionMatrix());
2026             modelview = createOrReuseMatrix(camera.getViewMatrix());
2027         }
2028         if (camera.getViewport())
2029             pushViewport(camera.getViewport());
2030
2031         pushProjectionMatrix(projection);
2032         pushModelViewMatrix(modelview, camera.getReferenceFrame());
2033
2034         traverse(camera);
2035
2036         // restore the previous model view matrix.
2037         popModelViewMatrix();
2038
2039         // restore the previous model view matrix.
2040         popProjectionMatrix();
2041
2042         if (camera.getViewport()) popViewport();
2043
2044         // restore the previous traversal mask settings
2045         if (mustSetCullMask)
2046             setTraversalMask(savedTraversalMask);
2047
2048         // restore the previous cull settings
2049         setCullSettings(saved_cull_settings);
2050     }
2051
2052 protected:
2053     // sort in reverse
2054     static bool freqComp(const InfoMap::iterator& lhs, const InfoMap::iterator& rhs)
2055     {
2056         return lhs->second > rhs->second;
2057     }
2058     InfoMap classInfo;
2059     InfoMap nodeInfo;
2060 };
2061
2062 bool printVisibleSceneInfo(FGRenderer* renderer)
2063 {
2064     osgViewer::Viewer* viewer = renderer->getViewer();
2065     VisibleSceneInfoVistor vsv;
2066     Viewport* vp = 0;
2067     if (!viewer->getCamera()->getViewport() && viewer->getNumSlaves() > 0) {
2068         const View::Slave& slave = viewer->getSlave(0);
2069         vp = slave._camera->getViewport();
2070     }
2071     vsv.doTraversal(viewer->getCamera(), viewer->getSceneData(), vp);
2072     return true;
2073 }
2074
2075 }
2076 // end of renderer.cxx
2077