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 #ifdef FG_JPEG_SERVER
  90 #include <simgear/screen/jpgfactory.hxx>
  91 #endif
  92
  93 #include <Time/light.hxx>
  94 #include <Time/light.hxx>
  95 #include <Cockpit/panel.hxx>
  96
  97 #include <Model/panelnode.hxx>
  98 #include <Model/modelmgr.hxx>
  99 #include <Model/acmodel.hxx>
 100 #include <Scenery/scenery.hxx>
 101 #include <Scenery/redout.hxx>
 102 #include <GUI/new_gui.hxx>
 103 #include <Instrumentation/HUD/HUD.hxx>
 104 #include <Environment/precipitation_mgr.hxx>
 105 #include <Environment/environment_mgr.hxx>
 106
 107 //#include <Main/main.hxx>
 108 #include "viewer.hxx"
 109 #include "viewmgr.hxx"
 110 #include "splash.hxx"
 111 #include "renderer.hxx"
 112 #include "CameraGroup.hxx"
 113 #include "FGEventHandler.hxx"
 114
 115 #include <plib/pu.h>
 116
 117 using namespace osg;
 118 using namespace simgear;
 119 using namespace flightgear;
 120
 121 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 122 public:
 123   FGHintUpdateCallback(const char* configNode) :
 124     mConfigNode(fgGetNode(configNode, true))
 125   { }
 126   virtual void operator()(osg::StateAttribute* stateAttribute,
 127                           osg::NodeVisitor*)
 128   {
 129     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 130     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 131
 132     const char* value = mConfigNode->getStringValue();
 133     if (!value)
 134       hint->setMode(GL_DONT_CARE);
 135     else if (0 == strcmp(value, "nicest"))
 136       hint->setMode(GL_NICEST);
 137     else if (0 == strcmp(value, "fastest"))
 138       hint->setMode(GL_FASTEST);
 139     else
 140       hint->setMode(GL_DONT_CARE);
 141   }
 142 private:
 143   SGPropertyNode_ptr mConfigNode;
 144 };
 145
 146
 147 class SGPuDrawable : public osg::Drawable {
 148 public:
 149   SGPuDrawable()
 150   {
 151     // Dynamic stuff, do not store geometry
 152     setUseDisplayList(false);
 153     setDataVariance(Object::DYNAMIC);
 154
 155     osg::StateSet* stateSet = getOrCreateStateSet();
 156     stateSet->setRenderBinDetails(1001, "RenderBin");
 157     // speed optimization?
 158     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 159     // We can do translucent menus, so why not. :-)
 160     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 161     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 162     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 163
 164     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 165
 166     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 167     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 168   }
 169   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 170   { drawImplementation(*renderInfo.getState()); }
 171   void drawImplementation(osg::State& state) const
 172   {
 173     state.setActiveTextureUnit(0);
 174     state.setClientActiveTextureUnit(0);
 175
 176     state.disableAllVertexArrays();
 177
 178     glPushAttrib(GL_ALL_ATTRIB_BITS);
 179     glPushClientAttrib(~0u);
 180
 181     puDisplay();
 182
 183     glPopClientAttrib();
 184     glPopAttrib();
 185   }
 186
 187   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 188   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 189
 190 private:
 191 };
 192
 193 class SGHUDDrawable : public osg::Drawable {
 194 public:
 195   SGHUDDrawable()
 196   {
 197     // Dynamic stuff, do not store geometry
 198     setUseDisplayList(false);
 199     setDataVariance(Object::DYNAMIC);
 200
 201     osg::StateSet* stateSet = getOrCreateStateSet();
 202     stateSet->setRenderBinDetails(1000, "RenderBin");
 203
 204     // speed optimization?
 205     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 206     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 207     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 208     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 209     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 210
 211     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 212   }
 213   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 214   { drawImplementation(*renderInfo.getState()); }
 215   void drawImplementation(osg::State& state) const
 216   {
 217     state.setActiveTextureUnit(0);
 218     state.setClientActiveTextureUnit(0);
 219     state.disableAllVertexArrays();
 220
 221     glPushAttrib(GL_ALL_ATTRIB_BITS);
 222     glPushClientAttrib(~0u);
 223
 224     // HUD can be NULL
 225       HUD *hud = static_cast<HUD*>(globals->get_subsystem("hud"));
 226       if (hud) {
 227           hud->draw(state);
 228       }
 229
 230     glPopClientAttrib();
 231     glPopAttrib();
 232   }
 233
 234   virtual osg::Object* cloneType() const { return new SGHUDDrawable; }
 235   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDDrawable; }
 236
 237 private:
 238 };
 239
 240 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 241 public:
 242
 243   /**
 244    * @param isSun true if the light is the actual sun i.e., for
 245    * illuminating the moon.
 246    */
 247   FGLightSourceUpdateCallback(bool isSun = false) : _isSun(isSun) {}
 248   FGLightSourceUpdateCallback(const FGLightSourceUpdateCallback& nc,
 249                               const CopyOp& op)
 250     : NodeCallback(nc, op), _isSun(nc._isSun)
 251   {}
 252   META_Object(flightgear,FGLightSourceUpdateCallback);
 253
 254   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 255   {
 256     assert(dynamic_cast<osg::LightSource*>(node));
 257     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 258     osg::Light* light = lightSource->getLight();
 259
 260     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 261       if (!l) {
 262           // lighting is down during re-init
 263           return;
 264       }
 265
 266     if (_isSun) {
 267       light->setAmbient(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 268       light->setDiffuse(Vec4(1.0f, 1.0f, 1.0f, 1.0f));
 269       light->setSpecular(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 270     } else {
 271       light->setAmbient(toOsg(l->scene_ambient()));
 272       light->setDiffuse(toOsg(l->scene_diffuse()));
 273       light->setSpecular(toOsg(l->scene_specular()));
 274     }
 275     osg::Vec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 276     light->setPosition(position);
 277
 278     traverse(node, nv);
 279   }
 280 private:
 281   const bool _isSun;
 282 };
 283
 284 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 285 public:
 286   FGWireFrameModeUpdateCallback() :
 287     mWireframe(fgGetNode("/sim/rendering/wireframe", true))
 288   { }
 289   virtual void operator()(osg::StateAttribute* stateAttribute,
 290                           osg::NodeVisitor*)
 291   {
 292     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 293     osg::PolygonMode* polygonMode;
 294     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 295
 296     if (mWireframe->getBoolValue())
 297       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 298                            osg::PolygonMode::LINE);
 299     else
 300       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 301                            osg::PolygonMode::FILL);
 302   }
 303 private:
 304   SGPropertyNode_ptr mWireframe;
 305 };
 306
 307 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 308 public:
 309   FGLightModelUpdateCallback() :
 310     mHighlights(fgGetNode("/sim/rendering/specular-highlight", true))
 311   { }
 312   virtual void operator()(osg::StateAttribute* stateAttribute,
 313                           osg::NodeVisitor*)
 314   {
 315     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 316     osg::LightModel* lightModel;
 317     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 318
 319 #if 0
 320     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 321     lightModel->setAmbientIntensity(toOsg(l->scene_ambient());
 322 #else
 323     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 324 #endif
 325     lightModel->setTwoSided(true);
 326     lightModel->setLocalViewer(false);
 327
 328     if (mHighlights->getBoolValue()) {
 329       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 330     } else {
 331       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 332     }
 333   }
 334 private:
 335   SGPropertyNode_ptr mHighlights;
 336 };
 337
 338 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 339 public:
 340   FGFogEnableUpdateCallback() :
 341     mFogEnabled(fgGetNode("/sim/rendering/fog", true))
 342   { }
 343   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 344   {
 345     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 346       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 347     } else {
 348       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 349     }
 350   }
 351 private:
 352   SGPropertyNode_ptr mFogEnabled;
 353 };
 354
 355 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 356 public:
 357   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 358   {
 359     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 360     assert(dynamic_cast<osg::Fog*>(sa));
 361     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 362     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 363     fog->setMode(osg::Fog::EXP2);
 364     fog->setColor(toOsg(updateVisitor->getFogColor()));
 365     fog->setDensity(updateVisitor->getFogExp2Density());
 366   }
 367 };
 368
 369 // update callback for the switch node guarding that splash
 370 class FGScenerySwitchCallback : public osg::NodeCallback {
 371 public:
 372   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 373   {
 374     assert(dynamic_cast<osg::Switch*>(node));
 375     osg::Switch* sw = static_cast<osg::Switch*>(node);
 376
 377     bool enabled = scenery_enabled;
 378     sw->setValue(0, enabled);
 379     if (!enabled)
 380       return;
 381     traverse(node, nv);
 382   }
 383
 384   static bool scenery_enabled;
 385 };
 386
 387 bool FGScenerySwitchCallback::scenery_enabled = false;
 388
 389 #ifdef FG_JPEG_SERVER
 390 static void updateRenderer()
 391 {
 392     globals->get_renderer()->update();
 393 }
 394 #endif
 395
 396 FGRenderer::FGRenderer() :
 397     _sky(NULL),
 398     _ambientFactor( new osg::Uniform( "fg_SunAmbientColor", osg::Vec4f() ) ),
 399     _sunDiffuse( new osg::Uniform( "fg_SunDiffuseColor", osg::Vec4f() ) ),
 400     _sunSpecular( new osg::Uniform( "fg_SunSpecularColor", osg::Vec4f() ) ),
 401     _sunDirection( new osg::Uniform( "fg_SunDirection", osg::Vec3f() ) ),
 402     _planes( new osg::Uniform( "fg_Planes", osg::Vec3f() ) ),
 403     _fogColor( new osg::Uniform( "fg_FogColor", osg::Vec4f(1.0, 1.0, 1.0, 1.0) ) ),
 404     _fogDensity( new osg::Uniform( "fg_FogDensity", 0.0001f ) ),
 405     _shadowNumber( new osg::Uniform( "fg_ShadowNumber", (int)4 ) ),
 406     _shadowDistances( new osg::Uniform( "fg_ShadowDistances", osg::Vec4f(5.0, 50.0, 500.0, 5000.0 ) ) ),
 407     _depthInColor( new osg::Uniform( "fg_DepthInColor", false ) )
 408 {
 409 #ifdef FG_JPEG_SERVER
 410    jpgRenderFrame = updateRenderer;
 411 #endif
 412
 413     // it's not the real root, whatever that means
 414     _root = new osg::Group;
 415     _root->setName("fakeRoot");
 416
 417     _updateVisitor = new SGUpdateVisitor;
 418     _root = new osg::Group;
 419     _deferredRealRoot = new osg::Group;
 420
 421    _numCascades = 4;
 422    _cascadeFar[0] = 5.f;
 423    _cascadeFar[1] = 50.f;
 424    _cascadeFar[2] = 500.f;
 425    _cascadeFar[3] = 5000.f;
 426 }
 427
 428 FGRenderer::~FGRenderer()
 429 {
 430     SGPropertyChangeListenerVec::iterator i = _listeners.begin();
 431     for (; i != _listeners.end(); ++i) {
 432         delete *i;
 433     }
 434
 435     // replace the viewer's scene completely
 436     getViewer()->setSceneData(new osg::Group);
 437
 438
 439 #ifdef FG_JPEG_SERVER
 440    jpgRenderFrame = NULL;
 441 #endif
 442     delete _sky;
 443 }
 444
 445 // Initialize various GL/view parameters
 446 // XXX This should be called "preinit" or something, as it initializes
 447 // critical parts of the scene graph in addition to the splash screen.
 448 void
 449 FGRenderer::splashinit( void )
 450       {
 451     osgViewer::Viewer* viewer = getViewer();
 452     viewer->setName("osgViewer");
 453     _viewerSceneRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 454     _viewerSceneRoot->setName("viewerSceneRoot");
 455
 456     ref_ptr<Node> splashNode = fgCreateSplashNode();
 457     if (_classicalRenderer) {
 458         _viewerSceneRoot->addChild(splashNode.get());
 459     } else {
 460         for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
 461                 ii != CameraGroup::getDefault()->camerasEnd();
 462                 ++ii )
 463         {
 464             CameraInfo* info = ii->get();
 465             Camera* camera = info->getCamera(DISPLAY_CAMERA);
 466             if (camera == 0) continue;
 467
 468             camera->addChild(splashNode.get());
 469         }
 470     }
 471
 472     _frameStamp = viewer->getFrameStamp();
 473     // Scene doesn't seem to pass the frame stamp to the update
 474     // visitor automatically.
 475     _updateVisitor->setFrameStamp(_frameStamp.get());
 476     viewer->setUpdateVisitor(_updateVisitor.get());
 477     fgSetDouble("/sim/startup/splash-alpha", 1.0);
 478 }
 479
 480 class ShadowMapSizeListener : public SGPropertyChangeListener {
 481 public:
 482     virtual void valueChanged(SGPropertyNode* node) {
 483         globals->get_renderer()->updateShadowMapSize(node->getIntValue());
 484     }
 485 };
 486
 487 class ShadowEnabledListener : public SGPropertyChangeListener {
 488 public:
 489     virtual void valueChanged(SGPropertyNode* node) {
 490         globals->get_renderer()->enableShadows(node->getBoolValue());
 491     }
 492 };
 493
 494 class ShadowNumListener : public SGPropertyChangeListener {
 495 public:
 496     virtual void valueChanged(SGPropertyNode* node) {
 497         globals->get_renderer()->updateCascadeNumber(node->getIntValue());
 498     }
 499 };
 500
 501 class ShadowRangeListener : public SGPropertyChangeListener {
 502 public:
 503     virtual void valueChanged(SGPropertyNode* node) {
 504         globals->get_renderer()->updateCascadeFar(node->getIndex(), node->getFloatValue());
 505     }
 506 };
 507
 508 void
 509 FGRenderer::addChangeListener(SGPropertyChangeListener* l, const char* path)
 510 {
 511     _listeners.push_back(l);
 512     fgAddChangeListener(l, path);
 513 }
 514
 515 void
 516 FGRenderer::init( void )
 517 {
 518     if (!eventHandler)
 519         eventHandler = new FGEventHandler();
 520
 521     sgUserDataInit( globals->get_props() );
 522
 523     _classicalRenderer = !fgGetBool("/sim/rendering/rembrandt/enabled", false);
 524     _shadowMapSize    = fgGetInt( "/sim/rendering/shadows/map-size", 4096 );
 525     addChangeListener( new ShadowMapSizeListener, "/sim/rendering/shadows/map-size" );
 526     addChangeListener( new ShadowEnabledListener, "/sim/rendering/shadows/enabled" );
 527     ShadowRangeListener* srl = new ShadowRangeListener;
 528     addChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[0]");
 529     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[1]");
 530     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[2]");
 531     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[3]");
 532     addChangeListener(new ShadowNumListener, "/sim/rendering/shadows/num-cascades");
 533     _numCascades = fgGetInt("/sim/rendering/shadows/num-cascades", 4);
 534     _cascadeFar[0] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[0]", 5.0f);
 535     _cascadeFar[1] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[1]", 50.0f);
 536     _cascadeFar[2] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[2]", 500.0f);
 537     _cascadeFar[3] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[3]", 5000.0f);
 538     updateCascadeNumber(_numCascades);
 539     updateCascadeFar(0, _cascadeFar[0]);
 540     updateCascadeFar(1, _cascadeFar[1]);
 541     updateCascadeFar(2, _cascadeFar[2]);
 542     updateCascadeFar(3, _cascadeFar[3]);
 543     _useColorForDepth = fgGetBool( "/sim/rendering/rembrandt/use-color-for-depth", false );
 544     _depthInColor->set( _useColorForDepth );
 545
 546     _renderer         = fgGetString("/sim/rendering/rembrandt/renderer", "default-pipeline");
 547     if (!_classicalRenderer)
 548         _pipeline = makeRenderingPipeline(_renderer, 0);
 549     _scenery_loaded   = fgGetNode("/sim/sceneryloaded", true);
 550     _position_finalized = fgGetNode("/sim/position-finalized", true);
 551
 552     _panel_hotspots   = fgGetNode("/sim/panel-hotspots", true);
 553     _virtual_cockpit  = fgGetNode("/sim/virtual-cockpit", true);
 554
 555     _sim_delta_sec = fgGetNode("/sim/time/delta-sec", true);
 556
 557     _xsize         = fgGetNode("/sim/startup/xsize", true);
 558     _ysize         = fgGetNode("/sim/startup/ysize", true);
 559     _splash_alpha  = fgGetNode("/sim/startup/splash-alpha", true);
 560
 561     _point_sprites        = fgGetNode("/sim/rendering/point-sprites", true);
 562     _enhanced_lighting    = fgGetNode("/sim/rendering/enhanced-lighting", true);
 563     _distance_attenuation = fgGetNode("/sim/rendering/distance-attenuation", true);
 564     _horizon_effect       = fgGetNode("/sim/rendering/horizon-effect", true);
 565     _textures             = fgGetNode("/sim/rendering/textures", true);
 566
 567     _altitude_ft = fgGetNode("/position/altitude-ft", true);
 568
 569     _cloud_status = fgGetNode("/environment/clouds/status", true);
 570     _visibility_m = fgGetNode("/environment/visibility-m", true);
 571
 572     bool use_point_sprites = _point_sprites->getBoolValue();
 573     bool enhanced_lighting = _enhanced_lighting->getBoolValue();
 574     bool distance_attenuation = _distance_attenuation->getBoolValue();
 575
 576     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 577                                   distance_attenuation );
 578
 579     if (const char* tc = fgGetString("/sim/rendering/texture-compression", NULL)) {
 580       if (strcmp(tc, "false") == 0 || strcmp(tc, "off") == 0 ||
 581           strcmp(tc, "0") == 0 || strcmp(tc, "no") == 0 ||
 582           strcmp(tc, "none") == 0) {
 583         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::DoNotUseCompression);
 584       } else if (strcmp(tc, "arb") == 0) {
 585         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseARBCompression);
 586       } else if (strcmp(tc, "dxt1") == 0) {
 587         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT1Compression);
 588       } else if (strcmp(tc, "dxt3") == 0) {
 589         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT3Compression);
 590       } else if (strcmp(tc, "dxt5") == 0) {
 591         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT5Compression);
 592       } else {
 593         SG_LOG(SG_VIEW, SG_WARN, "Unknown texture compression setting!");
 594       }
 595     }
 596
 597 // create sky, but can't build until setupView, since we depend
 598 // on other subsystems to be inited, eg Ephemeris
 599     _sky = new SGSky;
 600
 601     SGPath texture_path(globals->get_fg_root());
 602     texture_path.append("Textures");
 603     texture_path.append("Sky");
 604     for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
 605         SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
 606         _sky->add_cloud_layer(layer);
 607     }
 608
 609     _sky->texture_path( texture_path.str() );
 610
 611     if (!_classicalRenderer) {
 612         eventHandler->setChangeStatsCameraRenderOrder( true );
 613     }
 614 }
 615
 616 void installCullVisitor(Camera* camera)
 617 {
 618     osgViewer::Renderer* renderer
 619         = static_cast<osgViewer::Renderer*>(camera->getRenderer());
 620     for (int i = 0; i < 2; ++i) {
 621         osgUtil::SceneView* sceneView = renderer->getSceneView(i);
 622
 623         osg::ref_ptr<osgUtil::CullVisitor::Identifier> identifier;
 624         identifier = sceneView->getCullVisitor()->getIdentifier();
 625         sceneView->setCullVisitor(new simgear::EffectCullVisitor);
 626         sceneView->getCullVisitor()->setIdentifier(identifier.get());
 627
 628         identifier = sceneView->getCullVisitorLeft()->getIdentifier();
 629         sceneView->setCullVisitorLeft(sceneView->getCullVisitor()->clone());
 630         sceneView->getCullVisitorLeft()->setIdentifier(identifier.get());
 631
 632         identifier = sceneView->getCullVisitorRight()->getIdentifier();
 633         sceneView->setCullVisitorRight(sceneView->getCullVisitor()->clone());
 634         sceneView->getCullVisitorRight()->setIdentifier(identifier.get());
 635
 636     }
 637 }
 638
 639 CameraInfo*
 640 FGRenderer::buildRenderingPipeline(CameraGroup* cgroup, unsigned flags, Camera* camera,
 641                                    const Matrix& view,
 642                                    const Matrix& projection,
 643                                                                    osg::GraphicsContext* gc,
 644                                    bool useMasterSceneData)
 645 {
 646         CameraInfo* info = 0;
 647         if (!_classicalRenderer && (flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0)
 648                 info = buildDeferredPipeline( cgroup, flags, camera, view, projection, gc );
 649
 650         if (info) {
 651                 return info;
 652         } else {
 653                 if ((flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0)
 654                         _classicalRenderer = true;
 655                 return buildClassicalPipeline( cgroup, flags, camera, view, projection, useMasterSceneData );
 656         }
 657 }
 658
 659 CameraInfo*
 660 FGRenderer::buildClassicalPipeline(CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
 661                                 const osg::Matrix& view,
 662                                 const osg::Matrix& projection,
 663                                 bool useMasterSceneData)
 664 {
 665     CameraInfo* info = new CameraInfo(flags);
 666     // The camera group will always update the camera
 667     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
 668     info->name = "classic";
 669
 670     Camera* farCamera = 0;
 671     if ((flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0) {
 672         farCamera = new Camera;
 673         farCamera->setName("farCamera");
 674         farCamera->setAllowEventFocus(camera->getAllowEventFocus());
 675         farCamera->setGraphicsContext(camera->getGraphicsContext());
 676         farCamera->setCullingMode(camera->getCullingMode());
 677         farCamera->setInheritanceMask(camera->getInheritanceMask());
 678         farCamera->setReferenceFrame(Transform::ABSOLUTE_RF);
 679         // Each camera's viewport is written when the window is
 680         // resized; if the the viewport isn't copied here, it gets updated
 681         // twice and ends up with the wrong value.
 682         farCamera->setViewport(simgear::clone(camera->getViewport()));
 683         farCamera->setDrawBuffer(camera->getDrawBuffer());
 684         farCamera->setReadBuffer(camera->getReadBuffer());
 685         farCamera->setRenderTargetImplementation(
 686             camera->getRenderTargetImplementation());
 687         const Camera::BufferAttachmentMap& bufferMap
 688             = camera->getBufferAttachmentMap();
 689         if (bufferMap.count(Camera::COLOR_BUFFER) != 0) {
 690             farCamera->attach(
 691                 Camera::COLOR_BUFFER,
 692                 bufferMap.find(Camera::COLOR_BUFFER)->second._texture.get());
 693         }
 694         cgroup->getViewer()->addSlave(farCamera, projection, view, useMasterSceneData);
 695         installCullVisitor(farCamera);
 696                 int farSlaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
 697                 info->addCamera( FAR_CAMERA, farCamera, farSlaveIndex );
 698         farCamera->setRenderOrder(Camera::POST_RENDER, farSlaveIndex);
 699         camera->setCullMask(camera->getCullMask() & ~simgear::BACKGROUND_BIT);
 700         camera->setClearMask(GL_DEPTH_BUFFER_BIT);
 701     }
 702     cgroup->getViewer()->addSlave(camera, projection, view, useMasterSceneData);
 703     installCullVisitor(camera);
 704     int slaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
 705     info->addCamera( MAIN_CAMERA, camera, slaveIndex );
 706     camera->setRenderOrder(Camera::POST_RENDER, slaveIndex);
 707     cgroup->addCamera(info);
 708     return info;
 709 }
 710
 711 class FGDeferredRenderingCameraCullCallback : public osg::NodeCallback {
 712 public:
 713     FGDeferredRenderingCameraCullCallback( const std::string& k, CameraInfo* i, bool nd = false ) : kind( k ), info( i ), needsDuDv(nd) {}
 714     virtual void operator()( osg::Node *n, osg::NodeVisitor *nv) {
 715         simgear::EffectCullVisitor* cv = dynamic_cast<simgear::EffectCullVisitor*>(nv);
 716         osg::Camera* camera = static_cast<osg::Camera*>(n);
 717
 718         cv->clearBufferList();
 719         for (RenderBufferMap::iterator ii = info->buffers.begin(); ii != info->buffers.end(); ++ii) {
 720             cv->addBuffer(ii->first, ii->second.texture);
 721         }
 722
 723         if ( !info->getRenderStageInfo(kind).fullscreen )
 724             info->setMatrices( camera );
 725
 726         if (needsDuDv) {
 727             osg::Matrix projInverse;
 728             info->projInverse->get( projInverse );
 729
 730             osg::Vec4 p0 = osg::Vec4( -1.0, -1.0, 0.0, 1.0 ) * projInverse;
 731             info->du->set( osg::Vec4(  1.0, -1.0, 0.0, 1.0 ) * projInverse - p0 );
 732             info->dv->set( osg::Vec4( -1.0,  1.0, 0.0, 1.0 ) * projInverse - p0 );
 733         }
 734
 735         cv->traverse( *camera );
 736
 737         if ( kind == GEOMETRY_CAMERA ) {
 738             // Remove transparent bins. They will be renderer in the additional light stage (side effect)
 739             osgUtil::RenderStage* renderStage = cv->getRenderStage();
 740             osgUtil::RenderBin::RenderBinList& rbl = renderStage->getRenderBinList();
 741             for (osgUtil::RenderBin::RenderBinList::iterator rbi = rbl.begin(); rbi != rbl.end(); ) {
 742                 if (rbi->second->getSortMode() == osgUtil::RenderBin::SORT_BACK_TO_FRONT) {
 743                     rbl.erase( rbi++ );
 744                 } else {
 745                     ++rbi;
 746                 }
 747             }
 748         } else if ( kind == LIGHTING_CAMERA ) {
 749             osg::ref_ptr<osg::Camera> mainShadowCamera = info->getCamera( SHADOW_CAMERA );
 750             if (mainShadowCamera.valid()) {
 751                 osg::Switch* grp = mainShadowCamera->getChild(0)->asSwitch();
 752                 for (int i = 0; i < 4; ++i ) {
 753                     if (!grp->getValue(i))
 754                         continue;
 755
 756                     osg::Camera* cascadeCam = static_cast<osg::Camera*>( grp->getChild(i) );
 757                     osg::Matrixf shadowMatrix = camera->getInverseViewMatrix() *
 758                                                 cascadeCam->getViewMatrix() *
 759                                                 cascadeCam->getProjectionMatrix() *
 760                                                 osg::Matrix::translate(1.0, 1.0, 1.0) *
 761                                                 osg::Matrix::scale(0.5f, 0.5f, 0.5f);
 762
 763                     info->shadowMatrix[i]->set( shadowMatrix );
 764                 }
 765             }
 766         }
 767     }
 768
 769 private:
 770     std::string kind;
 771     CameraInfo* info;
 772     bool needsDuDv;
 773 };
 774
 775 osg::Texture2D* buildDeferredBuffer(GLint internalFormat, GLenum sourceFormat, GLenum sourceType, GLenum wrapMode, bool shadowComparison = false)
 776 {
 777     osg::Texture2D* tex = new osg::Texture2D;
 778     tex->setResizeNonPowerOfTwoHint( false );
 779     tex->setInternalFormat( internalFormat );
 780     tex->setShadowComparison(shadowComparison);
 781     if (shadowComparison) {
 782         tex->setShadowTextureMode(osg::Texture2D::LUMINANCE);
 783         tex->setBorderColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
 784     }
 785     tex->setSourceFormat(sourceFormat);
 786     tex->setSourceType(sourceType);
 787     tex->setFilter( osg::Texture2D::MIN_FILTER, osg::Texture2D::LINEAR );
 788     tex->setFilter( osg::Texture2D::MAG_FILTER, osg::Texture2D::LINEAR );
 789     tex->setWrap( osg::Texture::WRAP_S, (osg::Texture::WrapMode)wrapMode );
 790     tex->setWrap( osg::Texture::WRAP_T, (osg::Texture::WrapMode)wrapMode );
 791         return tex;
 792 }
 793
 794 void attachBufferToCamera( CameraInfo* info, osg::Camera* camera, osg::Camera::BufferComponent c, const std::string& ck, const std::string& bk )
 795 {
 796     camera->attach( c, info->getBuffer(bk) );
 797     info->getRenderStageInfo(ck).buffers.insert( std::make_pair( c, bk ) );
 798 }
 799
 800 void buildAttachments(CameraInfo* info, osg::Camera* camera, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments) {
 801     BOOST_FOREACH(ref_ptr<FGRenderingPipeline::Attachment> attachment, attachments) {
 802         if (attachment->valid())
 803             attachBufferToCamera( info, camera, attachment->component, name, attachment->buffer );
 804     }
 805 }
 806
 807 osg::Camera* FGRenderer::buildDeferredGeometryCamera( CameraInfo* info, osg::GraphicsContext* gc, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments )
 808 {
 809     osg::Camera* camera = new osg::Camera;
 810     info->addCamera(name, camera );
 811
 812     camera->setCullMask( ~simgear::MODELLIGHT_BIT );
 813     camera->setName( "GeometryC" );
 814     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
 815     camera->setGraphicsContext( gc );
 816     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( name, info ) );
 817     camera->setClearMask( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
 818     camera->setClearColor( osg::Vec4( 0., 0., 0., 0. ) );
 819     camera->setClearDepth( 1.0 );
 820     camera->setColorMask(true, true, true, true);
 821     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
 822     camera->setRenderOrder(osg::Camera::NESTED_RENDER, 0);
 823     camera->setViewport( new osg::Viewport );
 824     buildAttachments(info, camera, name, attachments);
 825     camera->setDrawBuffer(GL_FRONT);
 826     camera->setReadBuffer(GL_FRONT);
 827
 828     osg::StateSet* ss = camera->getOrCreateStateSet();
 829     ss->addUniform( _depthInColor );
 830
 831     camera->addChild( _deferredRealRoot.get() );
 832
 833     return camera;
 834 }
 835
 836 static void setShadowCascadeStateSet( osg::Camera* cam ) {
 837     osg::StateSet* ss = cam->getOrCreateStateSet();
 838     ss->setAttribute( new osg::PolygonOffset( 1.1f, 5.0f ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 839     ss->setMode( GL_POLYGON_OFFSET_FILL, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 840     ss->setRenderBinDetails( 0, "RenderBin", osg::StateSet::OVERRIDE_RENDERBIN_DETAILS );
 841     ss->setAttributeAndModes( new osg::AlphaFunc( osg::AlphaFunc::GREATER, 0.05 ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 842     ss->setAttributeAndModes( new osg::ColorMask( false, false, false, false ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 843     ss->setAttributeAndModes( new osg::CullFace( osg::CullFace::FRONT ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 844     osg::Program* program = new osg::Program;
 845     ss->setAttribute( program, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON );
 846     ss->setMode( GL_LIGHTING, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 847     ss->setMode( GL_BLEND, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 848     //ss->setTextureMode( 0, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON );
 849     ss->setTextureMode( 0, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 850     ss->setTextureMode( 1, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 851     ss->setTextureMode( 1, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 852     ss->setTextureMode( 2, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 853     ss->setTextureMode( 2, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 854 }
 855
 856 static osg::Camera* createShadowCascadeCamera( int no, int cascadeSize ) {
 857     osg::Camera* cascadeCam = new osg::Camera;
 858     setShadowCascadeStateSet( cascadeCam );
 859
 860     std::ostringstream oss;
 861     oss << "CascadeCamera" << (no + 1);
 862     cascadeCam->setName( oss.str() );
 863     cascadeCam->setClearMask(0);
 864     cascadeCam->setCullMask( simgear::CASTSHADOW_BIT );
 865     cascadeCam->setCullingMode( cascadeCam->getCullingMode() | osg::CullSettings::SMALL_FEATURE_CULLING );
 866     cascadeCam->setAllowEventFocus(false);
 867     cascadeCam->setReferenceFrame(osg::Transform::ABSOLUTE_RF_INHERIT_VIEWPOINT);
 868     cascadeCam->setRenderOrder(osg::Camera::NESTED_RENDER);
 869     cascadeCam->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 870     cascadeCam->setViewport( int( no / 2 ) * cascadeSize, (no & 1) * cascadeSize, cascadeSize, cascadeSize );
 871     return cascadeCam;
 872 }
 873
 874 osg::Camera* FGRenderer::buildDeferredShadowCamera( CameraInfo* info, osg::GraphicsContext* gc, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments )
 875 {
 876     osg::Camera* mainShadowCamera = new osg::Camera;
 877     info->addCamera(name, mainShadowCamera, 0.0f );
 878
 879     mainShadowCamera->setName( "ShadowC" );
 880     mainShadowCamera->setClearMask( GL_DEPTH_BUFFER_BIT );
 881     mainShadowCamera->setClearDepth( 1.0 );
 882     mainShadowCamera->setAllowEventFocus(false);
 883     mainShadowCamera->setGraphicsContext(gc);
 884     mainShadowCamera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
 885     buildAttachments(info, mainShadowCamera, name, attachments);
 886     mainShadowCamera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
 887     mainShadowCamera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
 888     mainShadowCamera->setProjectionMatrix(osg::Matrix::identity());
 889     mainShadowCamera->setCullingMode( osg::CullSettings::NO_CULLING );
 890     mainShadowCamera->setViewport( 0, 0, _shadowMapSize, _shadowMapSize );
 891     mainShadowCamera->setDrawBuffer(GL_FRONT);
 892     mainShadowCamera->setReadBuffer(GL_FRONT);
 893     mainShadowCamera->setRenderOrder(Camera::NESTED_RENDER, 1);
 894
 895     osg::Switch* shadowSwitch = new osg::Switch;
 896     mainShadowCamera->addChild( shadowSwitch );
 897
 898     for (int i = 0; i < 4; ++i ) {
 899         osg::Camera* cascadeCam = createShadowCascadeCamera( i, _shadowMapSize/2 );
 900         cascadeCam->addChild( _deferredRealRoot.get() );
 901         shadowSwitch->addChild( cascadeCam );
 902     }
 903     if (fgGetBool("/sim/rendering/shadows/enabled", true))
 904         shadowSwitch->setAllChildrenOn();
 905     else
 906         shadowSwitch->setAllChildrenOff();
 907
 908     return mainShadowCamera;
 909 }
 910
 911 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)
 912 {
 913     osg::Camera* cascade = static_cast<osg::Camera*>( grp->getChild(idx) );
 914     osg::Matrixd &viewMatrix = cascade->getViewMatrix();
 915     osg::Matrixd &projectionMatrix = cascade->getProjectionMatrix();
 916
 917     osg::BoundingSphere bs;
 918     bs.expandBy(osg::Vec3(left,bottom,-zNear) * f1);
 919     bs.expandBy(osg::Vec3(right,top,-zNear) * f2);
 920     bs.expandBy(osg::Vec3(left,bottom,-zNear) * f2);
 921     bs.expandBy(osg::Vec3(right,top,-zNear) * f1);
 922
 923     osg::Vec4 aim = osg::Vec4(bs.center(), 1.0) * camera->getInverseViewMatrix();
 924
 925     projectionMatrix.makeOrtho( -bs.radius(), bs.radius(), -bs.radius(), bs.radius(), 1., 15000.0 );
 926     osg::Vec3 position( aim.x(), aim.y(), aim.z() );
 927     viewMatrix.makeLookAt( position + (getSunDirection() * 10000.0), position, position );
 928 }
 929
 930 osg::Vec3 FGRenderer::getSunDirection() const
 931 {
 932     osg::Vec3 val;
 933     _sunDirection->get( val );
 934     return val;
 935 }
 936
 937 void FGRenderer::updateShadowCamera(const CameraInfo* info, const osg::Vec3d& position)
 938 {
 939     ref_ptr<Camera> mainShadowCamera = info->getCamera( SHADOW_CAMERA );
 940     if (mainShadowCamera.valid()) {
 941         ref_ptr<Switch> shadowSwitch = mainShadowCamera->getChild( 0 )->asSwitch();
 942         osg::Vec3d up = position,
 943             dir = getSunDirection();
 944         up.normalize();
 945         dir.normalize();
 946         // cos(100 deg) == -0.17
 947         if (up * dir < -0.17 || !fgGetBool("/sim/rendering/shadows/enabled", true)) {
 948             shadowSwitch->setAllChildrenOff();
 949         } else {
 950             double left,right,bottom,top,zNear,zFar;
 951             ref_ptr<Camera> camera = info->getCamera(GEOMETRY_CAMERA);
 952             camera->getProjectionMatrix().getFrustum(left,right,bottom,top,zNear,zFar);
 953
 954             shadowSwitch->setAllChildrenOn();
 955             if (_numCascades == 1) {
 956                 osg::Camera* cascadeCam = static_cast<osg::Camera*>( shadowSwitch->getChild(0) );
 957                 cascadeCam->setViewport( 0, 0, _shadowMapSize, _shadowMapSize );
 958             } else {
 959                 for (int no = 0; no < 4; ++no) {
 960                     osg::Camera* cascadeCam = static_cast<osg::Camera*>( shadowSwitch->getChild(no) );
 961                     cascadeCam->setViewport( int( no / 2 ) * (_shadowMapSize/2), (no & 1) * (_shadowMapSize/2), (_shadowMapSize/2), (_shadowMapSize/2) );
 962                 }
 963             }
 964             updateShadowCascade(info, camera, shadowSwitch, 0, left, right, bottom, top, zNear, 1.0, _cascadeFar[0]/zNear);
 965             if (_numCascades > 1) {
 966                 shadowSwitch->setValue(1, true);
 967                 updateShadowCascade(info, camera, shadowSwitch, 1, left, right, bottom, top, zNear, _cascadeFar[0]/zNear, _cascadeFar[1]/zNear);
 968             } else {
 969                 shadowSwitch->setValue(1, false);
 970             }
 971             if (_numCascades > 2) {
 972                 shadowSwitch->setValue(2, true);
 973                 updateShadowCascade(info, camera, shadowSwitch, 2, left, right, bottom, top, zNear, _cascadeFar[1]/zNear, _cascadeFar[2]/zNear);
 974             } else {
 975                 shadowSwitch->setValue(2, false);
 976             }
 977             if (_numCascades > 3) {
 978                 shadowSwitch->setValue(3, true);
 979                 updateShadowCascade(info, camera, shadowSwitch, 3, left, right, bottom, top, zNear, _cascadeFar[2]/zNear, _cascadeFar[3]/zNear);
 980             } else {
 981                 shadowSwitch->setValue(3, false);
 982             }
 983             {
 984             osg::Matrixd &viewMatrix = mainShadowCamera->getViewMatrix();
 985
 986             osg::Vec4 aim = osg::Vec4( 0.0, 0.0, 0.0, 1.0 ) * camera->getInverseViewMatrix();
 987
 988             osg::Vec3 position( aim.x(), aim.y(), aim.z() );
 989             viewMatrix.makeLookAt( position, position + (getSunDirection() * 10000.0), position );
 990             }
 991         }
 992     }
 993 }
 994
 995 void FGRenderer::updateShadowMapSize(int mapSize)
 996 {
 997     if ( ((~( mapSize-1 )) & mapSize) != mapSize ) {
 998         SG_LOG( SG_VIEW, SG_ALERT, "Map size is not a power of two" );
 999         return;
1000     }
1001     for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
1002             ii != CameraGroup::getDefault()->camerasEnd();
1003             ++ii )
1004     {
1005         CameraInfo* info = ii->get();
1006         Camera* camera = info->getCamera(SHADOW_CAMERA);
1007         if (camera == 0) continue;
1008
1009         Texture2D* tex = info->getBuffer("shadow");
1010         if (tex == 0) continue;
1011
1012         tex->setTextureSize( mapSize, mapSize );
1013         tex->dirtyTextureObject();
1014
1015         Viewport* vp = camera->getViewport();
1016         vp->width() = mapSize;
1017         vp->height() = mapSize;
1018
1019         osgViewer::Renderer* renderer
1020             = static_cast<osgViewer::Renderer*>(camera->getRenderer());
1021         for (int i = 0; i < 2; ++i) {
1022             osgUtil::SceneView* sceneView = renderer->getSceneView(i);
1023             sceneView->getRenderStage()->setFrameBufferObject(0);
1024             sceneView->getRenderStage()->setCameraRequiresSetUp(true);
1025             if (sceneView->getRenderStageLeft()) {
1026                 sceneView->getRenderStageLeft()->setFrameBufferObject(0);
1027                 sceneView->getRenderStageLeft()->setCameraRequiresSetUp(true);
1028             }
1029             if (sceneView->getRenderStageRight()) {
1030                 sceneView->getRenderStageRight()->setFrameBufferObject(0);
1031                 sceneView->getRenderStageRight()->setCameraRequiresSetUp(true);
1032             }
1033         }
1034
1035         int cascadeSize = mapSize / 2;
1036         Group* grp = camera->getChild(0)->asGroup();
1037         for (int i = 0; i < 4; ++i ) {
1038             Camera* cascadeCam = static_cast<Camera*>( grp->getChild(i) );
1039             cascadeCam->setViewport( int( i / 2 ) * cascadeSize, (i & 1) * cascadeSize, cascadeSize, cascadeSize );
1040         }
1041
1042         _shadowMapSize = mapSize;
1043     }
1044 }
1045
1046 void FGRenderer::enableShadows(bool enabled)
1047 {
1048     for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
1049             ii != CameraGroup::getDefault()->camerasEnd();
1050             ++ii )
1051     {
1052         CameraInfo* info = ii->get();
1053         Camera* camera = info->getCamera(SHADOW_CAMERA);
1054         if (camera == 0) continue;
1055
1056         osg::Switch* shadowSwitch = camera->getChild(0)->asSwitch();
1057         if (enabled)
1058             shadowSwitch->setAllChildrenOn();
1059         else
1060             shadowSwitch->setAllChildrenOff();
1061     }
1062 }
1063
1064 void FGRenderer::updateCascadeFar(int index, float far_m)
1065 {
1066     if (index < 0 || index > 3)
1067         return;
1068     _cascadeFar[index] = far_m;
1069     _shadowDistances->set( osg::Vec4f(_cascadeFar[0], _cascadeFar[1], _cascadeFar[2], _cascadeFar[3]) );
1070 }
1071
1072 void FGRenderer::updateCascadeNumber(size_t num)
1073 {
1074     if (num < 1 || num > 4)
1075         return;
1076     _numCascades = num;
1077     _shadowNumber->set( (int)_numCascades );
1078 }
1079
1080 class DebugPassListener : public SGPropertyChangeListener {
1081 public:
1082     DebugPassListener(osg::Switch* sw, int i) : _switch(sw), _index(i) {}
1083     virtual void valueChanged(SGPropertyNode* node) {
1084         _switch->setValue(_index, node->getBoolValue());
1085     }
1086
1087 private:
1088     osg::ref_ptr<osg::Switch> _switch;
1089     int _index;
1090 };
1091
1092 osg::Camera*
1093 FGRenderer::buildDeferredLightingCamera( flightgear::CameraInfo* info, osg::GraphicsContext* gc, const FGRenderingPipeline::Stage* stage )
1094 {
1095     osg::Camera* camera = new osg::Camera;
1096     info->addCamera(stage->name, camera );
1097
1098     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( stage->name, info ) );
1099     camera->setAllowEventFocus(false);
1100     camera->setGraphicsContext(gc);
1101     camera->setViewport(new Viewport);
1102     camera->setName(stage->name+"C");
1103     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1104     camera->setRenderOrder(osg::Camera::NESTED_RENDER, stage->orderNum);
1105     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1106     camera->setViewport( new osg::Viewport );
1107     buildAttachments(info, camera, stage->name, stage->attachments);
1108     camera->setDrawBuffer(GL_FRONT);
1109     camera->setReadBuffer(GL_FRONT);
1110     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1111     osg::StateSet* ss = camera->getOrCreateStateSet();
1112     ss->setAttribute( new osg::Depth(osg::Depth::LESS, 0.0, 1.0, false) );
1113     ss->addUniform( _depthInColor );
1114
1115     osg::Switch* lightingGroup = new osg::Switch;
1116
1117     BOOST_FOREACH( osg::ref_ptr<FGRenderingPipeline::Pass> pass, stage->passes ) {
1118         ref_ptr<Node> node = buildPass(info, pass);
1119         if (node.valid()) {
1120             lightingGroup->addChild(node);
1121             if (!pass->debugProperty.empty()) {
1122                 lightingGroup->setValue(lightingGroup->getNumChildren()-1, fgGetBool(pass->debugProperty));
1123                 fgAddChangeListener(new DebugPassListener(lightingGroup, lightingGroup->getNumChildren()-1), pass->debugProperty);
1124             }
1125         }
1126     }
1127
1128     camera->addChild( lightingGroup );
1129
1130     return camera;
1131 }
1132
1133 CameraInfo*
1134 FGRenderer::buildDeferredPipeline(CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
1135                                     const osg::Matrix& view,
1136                                     const osg::Matrix& projection,
1137                                     osg::GraphicsContext* gc)
1138 {
1139     return buildCameraFromRenderingPipeline(_pipeline, cgroup, flags, camera, view, projection, gc);
1140 }
1141
1142 osg::Camera*
1143 FGRenderer::buildDeferredFullscreenCamera( flightgear::CameraInfo* info, const FGRenderingPipeline::Pass* pass )
1144 {
1145     osg::Camera* camera = new osg::Camera;
1146
1147     camera->setClearMask( 0 );
1148     camera->setAllowEventFocus(false);
1149     camera->setName(pass->name+"C");
1150     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1151     camera->setRenderOrder(osg::Camera::NESTED_RENDER, pass->orderNum);
1152     camera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1153     camera->setViewMatrix(osg::Matrix::identity());
1154     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1155
1156     osg::StateSet* ss = camera->getOrCreateStateSet();
1157     ss->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1158     ss->addUniform( info->projInverse );
1159     ss->addUniform( info->viewInverse );
1160     ss->addUniform( info->view );
1161     ss->addUniform( info->bufferSize );
1162     ss->addUniform( info->worldPosCart );
1163     ss->addUniform( info->worldPosGeod );
1164     ss->addUniform( info->shadowMatrix[0] );
1165     ss->addUniform( info->shadowMatrix[1] );
1166     ss->addUniform( info->shadowMatrix[2] );
1167     ss->addUniform( info->shadowMatrix[3] );
1168     ss->addUniform( _ambientFactor );
1169     ss->addUniform( _sunDiffuse );
1170     ss->addUniform( _sunSpecular );
1171     ss->addUniform( _sunDirection );
1172     ss->addUniform( _planes );
1173     ss->addUniform( _shadowNumber );
1174     ss->addUniform( _shadowDistances );
1175     ss->addUniform( _fogColor );
1176     ss->addUniform( _fogDensity );
1177
1178     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1179     g->setUseDisplayList(false);
1180     simgear::EffectGeode* eg = new simgear::EffectGeode;
1181     osg::ref_ptr<SGReaderWriterOptions> opt;
1182     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1183     opt->setPropertyNode(globals->get_props());
1184     simgear::Effect* effect = simgear::makeEffect(pass->effect, true, opt.get());
1185     if (effect) {
1186         eg->setEffect( effect );
1187     }
1188
1189     eg->setName(pass->name+"Quad");
1190     eg->setCullingActive(false);
1191     eg->addDrawable(g);
1192     camera->addChild(eg);
1193
1194     return camera;
1195 }
1196
1197 osg::Camera*
1198 FGRenderer::buildDeferredFullscreenCamera( flightgear::CameraInfo* info, osg::GraphicsContext* gc, const FGRenderingPipeline::Stage* stage )
1199 {
1200     osg::Camera* camera = buildDeferredFullscreenCamera(info, static_cast<const FGRenderingPipeline::Pass*>(stage));
1201     info->addCamera(stage->name, camera, stage->scaleFactor, true);
1202
1203     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback(stage->name, info, stage->needsDuDv) );
1204     camera->setGraphicsContext(gc);
1205     camera->setViewport(new Viewport);
1206     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1207     buildAttachments(info, camera, stage->name, stage->attachments);
1208     camera->setDrawBuffer(GL_FRONT);
1209     camera->setReadBuffer(GL_FRONT);
1210     camera->setClearColor( osg::Vec4( 1., 1., 1., 1. ) );
1211     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1212     camera->setViewMatrix(osg::Matrix::identity());
1213     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1214
1215     osg::StateSet* ss = camera->getOrCreateStateSet();
1216     if (stage->needsDuDv) {
1217         ss->addUniform( info->du );
1218         ss->addUniform( info->dv );
1219     }
1220
1221     return camera;
1222 }
1223
1224 void
1225 FGRenderer::buildDeferredDisplayCamera( osg::Camera* camera, flightgear::CameraInfo* info, const FGRenderingPipeline::Stage* stage, osg::GraphicsContext* gc )
1226 {
1227     camera->setName( "DisplayC" );
1228     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( stage->name, info ) );
1229     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
1230     camera->setAllowEventFocus(false);
1231     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1232     g->setUseDisplayList(false); //DEBUG
1233     simgear::EffectGeode* eg = new simgear::EffectGeode;
1234     osg::ref_ptr<SGReaderWriterOptions> opt;
1235     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1236     opt->setPropertyNode(globals->get_props());
1237     simgear::Effect* effect = simgear::makeEffect(stage->effect, true, opt.get());
1238     if (!effect) {
1239         SG_LOG(SG_VIEW, SG_ALERT, stage->effect + " not found");
1240         return;
1241     }
1242     eg->setEffect(effect);
1243     eg->setCullingActive(false);
1244     eg->addDrawable(g);
1245     camera->setViewMatrix(osg::Matrix::identity());
1246     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1247     camera->addChild(eg);
1248
1249     osg::StateSet* ss = camera->getOrCreateStateSet();
1250     ss->addUniform( _depthInColor );
1251     ss->addUniform( info->projInverse );
1252     ss->addUniform( info->viewInverse );
1253     ss->addUniform( info->view );
1254     ss->addUniform( info->bufferSize );
1255     ss->addUniform( info->worldPosCart );
1256     ss->addUniform( info->worldPosGeod );
1257     ss->addUniform( info->shadowMatrix[0] );
1258     ss->addUniform( info->shadowMatrix[1] );
1259     ss->addUniform( info->shadowMatrix[2] );
1260     ss->addUniform( info->shadowMatrix[3] );
1261     ss->addUniform( _ambientFactor );
1262     ss->addUniform( _sunDiffuse );
1263     ss->addUniform( _sunSpecular );
1264     ss->addUniform( _sunDirection );
1265     ss->addUniform( _planes );
1266     ss->addUniform( _shadowNumber );
1267     ss->addUniform( _shadowDistances );
1268     ss->addUniform( _fogColor );
1269     ss->addUniform( _fogDensity );
1270 }
1271
1272 void
1273 FGRenderer::buildStage(CameraInfo* info,
1274                         FGRenderingPipeline::Stage* stage,
1275                         CameraGroup* cgroup,
1276                         osg::Camera* mainCamera,
1277                         const osg::Matrix& view, const osg::Matrix& projection, osg::GraphicsContext* gc)
1278 {
1279     if (!stage->valid())
1280         return;
1281
1282     ref_ptr<Camera> camera;
1283     bool needOffsets = false;
1284     if (stage->type == "geometry") {
1285         camera = buildDeferredGeometryCamera(info, gc, stage->name, stage->attachments);
1286         needOffsets = true;
1287     } else if (stage->type == "lighting") {
1288         camera = buildDeferredLightingCamera(info, gc, stage);
1289         needOffsets = true;
1290     } else if (stage->type == "shadow")
1291         camera = buildDeferredShadowCamera(info, gc, stage->name, stage->attachments);
1292     else if (stage->type == "fullscreen")
1293         camera = buildDeferredFullscreenCamera(info, gc, stage);
1294     else if (stage->type == "display") {
1295         camera = mainCamera;
1296         buildDeferredDisplayCamera(camera, info, stage, gc);
1297     } else
1298         throw sg_exception("Stage type is not supported");
1299
1300     if (needOffsets)
1301         cgroup->getViewer()->addSlave(camera, projection, view, false);
1302     else
1303         cgroup->getViewer()->addSlave(camera, false);
1304     installCullVisitor(camera);
1305     int slaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
1306     if (stage->type == "display")
1307         info->addCamera( stage->type, camera, slaveIndex, true );
1308     info->getRenderStageInfo(stage->name).slaveIndex = slaveIndex;
1309 }
1310
1311 osg::Node*
1312 FGRenderer::buildLightingSkyCloudsPass(FGRenderingPipeline::Pass* pass)
1313 {
1314     Group* group = new Group;
1315     group->setName("skyCloudsGroup");
1316     group->setNodeMask(simgear::BACKGROUND_BIT);
1317
1318     StateSet* ss = group->getOrCreateStateSet();
1319     ss->setAttributeAndModes( new osg::ColorMask( true, true, true, false ), osg::StateAttribute::ON );
1320     group->addChild( _sky->getPreRoot() );
1321     group->addChild( _sky->getCloudRoot() );
1322     return group;
1323 }
1324
1325 osg::Node*
1326 FGRenderer::buildLightingLightsPass(CameraInfo* info, FGRenderingPipeline::Pass* pass)
1327 {
1328     osg::Camera* lightCam = new osg::Camera;
1329     StateSet* ss = lightCam->getOrCreateStateSet();
1330     ss->addUniform( _planes );
1331     ss->addUniform( info->bufferSize );
1332     ss->addUniform( _fogColor );
1333     ss->addUniform( _fogDensity );
1334     lightCam->setName( "LightCamera" );
1335     lightCam->setClearMask(0);
1336     lightCam->setAllowEventFocus(false);
1337     lightCam->setReferenceFrame(osg::Transform::RELATIVE_RF);
1338     lightCam->setRenderOrder(osg::Camera::NESTED_RENDER,pass->orderNum);
1339     lightCam->setViewMatrix(osg::Matrix::identity());
1340     lightCam->setProjectionMatrix(osg::Matrix::identity());
1341     lightCam->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1342     lightCam->setCullMask( simgear::MODELLIGHT_BIT | simgear::PANEL2D_BIT | simgear::PERMANENTLIGHT_BIT);
1343     lightCam->setInheritanceMask( osg::CullSettings::ALL_VARIABLES & ~osg::CullSettings::CULL_MASK );
1344     lightCam->addChild( _deferredRealRoot.get() );
1345
1346     return lightCam;
1347 }
1348
1349 osg::Node*
1350 FGRenderer::buildPass(CameraInfo* info, FGRenderingPipeline::Pass* pass)
1351 {
1352     if (!pass->valid())
1353         return 0;
1354
1355     ref_ptr<Node> node;
1356     if (pass->type == "sky-clouds")
1357         node = buildLightingSkyCloudsPass(pass);
1358     else if (pass->type == "fullscreen")
1359         node = buildDeferredFullscreenCamera(info, pass);
1360     else if (pass->type == "lights")
1361         node = buildLightingLightsPass(info, pass);
1362     else
1363         throw sg_exception("Pass type is not supported");
1364
1365     return node.release();
1366 }
1367
1368 void
1369 FGRenderer::buildBuffers(FGRenderingPipeline* rpipe, CameraInfo* info)
1370 {
1371     for (size_t i = 0; i < rpipe->buffers.size(); ++i) {
1372         osg::ref_ptr<FGRenderingPipeline::Buffer> buffer = rpipe->buffers[i];
1373         if (buffer->valid()) {
1374             bool fullscreen = buffer->width == -1 && buffer->height == -1;
1375             info->addBuffer(buffer->name, buildDeferredBuffer( buffer->internalFormat,
1376                                                                 buffer->sourceFormat,
1377                                                                 buffer->sourceType,
1378                                                                 buffer->wrapMode,
1379                                                                 buffer->shadowComparison),
1380                             fullscreen ? buffer->scaleFactor : 0.0f);
1381             if (!fullscreen) {
1382                 info->getBuffer(buffer->name)->setTextureSize(buffer->width, buffer->height);
1383             }
1384         }
1385     }
1386 }
1387
1388 CameraInfo* FGRenderer::buildCameraFromRenderingPipeline(FGRenderingPipeline* rpipe, CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
1389                                     const osg::Matrix& view, const osg::Matrix& projection, osg::GraphicsContext* gc)
1390 {
1391     CameraInfo* info = new CameraInfo(flags);
1392     buildBuffers(rpipe, info);
1393
1394     for (size_t i = 0; i < rpipe->stages.size(); ++i) {
1395         osg::ref_ptr<FGRenderingPipeline::Stage> stage = rpipe->stages[i];
1396         buildStage(info, stage, cgroup, camera, view, projection, gc);
1397     }
1398
1399     cgroup->addCamera(info);
1400
1401     return info;
1402 }
1403
1404 void
1405 FGRenderer::setupView( void )
1406 {
1407     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1408     osg::initNotifyLevel();
1409
1410     // The number of polygon-offset "units" to place between layers.  In
1411     // principle, one is supposed to be enough.  In practice, I find that
1412     // my hardware/driver requires many more.
1413     osg::PolygonOffset::setUnitsMultiplier(1);
1414     osg::PolygonOffset::setFactorMultiplier(1);
1415
1416 // build the sky
1417     // The sun and moon diameters are scaled down numbers of the
1418     // actual diameters. This was needed to fit both the sun and the
1419     // moon within the distance to the far clip plane.
1420     // Moon diameter:    3,476 kilometers
1421     // Sun diameter: 1,390,000 kilometers
1422     osg::ref_ptr<SGReaderWriterOptions> opt;
1423     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1424     opt->setPropertyNode(globals->get_props());
1425     _sky->build( 80000.0, 80000.0,
1426                   463.3, 361.8,
1427                   *globals->get_ephem(),
1428                   fgGetNode("/environment", true),
1429                   opt.get());
1430
1431     viewer->getCamera()
1432         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1433
1434     osg::StateSet* stateSet = _root->getOrCreateStateSet();
1435
1436     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
1437
1438     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
1439     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1440
1441     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
1442     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
1443     stateSet->setAttribute(new osg::BlendFunc);
1444     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
1445
1446     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
1447
1448     // this will be set below
1449     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
1450
1451     osg::Material* material = new osg::Material;
1452     stateSet->setAttribute(material);
1453
1454     stateSet->setTextureAttribute(0, new osg::TexEnv);
1455     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
1456
1457     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
1458     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
1459     stateSet->setAttribute(hint);
1460     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
1461     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
1462     stateSet->setAttribute(hint);
1463     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
1464     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
1465     stateSet->setAttribute(hint);
1466     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
1467     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
1468     stateSet->setAttribute(hint);
1469     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
1470     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
1471     stateSet->setAttribute(hint);
1472
1473     osg::Group* sceneGroup = new osg::Group;
1474     sceneGroup->setName("rendererScene");
1475     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
1476     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
1477
1478     //sceneGroup->addChild(thesky->getCloudRoot());
1479
1480     stateSet = sceneGroup->getOrCreateStateSet();
1481     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
1482
1483     // need to update the light on every frame
1484     // OSG LightSource objects are rather confusing. OSG only supports
1485     // the 10 lights specified by OpenGL itself; if more than one
1486     // LightSource in the scene graph have the same light number, it's
1487     // indeterminate which values will be used to render geometry that
1488     // has that light number enabled. Also, adding children to a
1489     // LightSource is just a shortcut for setting up a state set that
1490     // has the corresponding OpenGL light enabled: a LightSource will
1491     // affect geometry anywhere in the scene graph that has its light
1492     // number enabled in a state set.
1493     LightSource* lightSource = new LightSource;
1494     lightSource->setName("FGLightSource");
1495     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
1496     // relative because of CameraView being just a clever transform node
1497     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
1498     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
1499     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
1500     _viewerSceneRoot->addChild(lightSource);
1501
1502     // we need a white diffuse light for the phase of the moon
1503     osg::LightSource* sunLight = new osg::LightSource;
1504     sunLight->setName("sunLightSource");
1505     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
1506     sunLight->getLight()->setLightNum(1);
1507     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
1508     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
1509     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
1510
1511     // Hang a StateSet above the sky subgraph in order to turn off
1512     // light 0
1513     Group* skyGroup = new Group;
1514     skyGroup->setName("rendererSkyParent");
1515     StateSet* skySS = skyGroup->getOrCreateStateSet();
1516     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
1517     skyGroup->addChild(_sky->getPreRoot());
1518     sunLight->addChild(skyGroup);
1519
1520     _root->addChild(sceneGroup);
1521     if ( _classicalRenderer )
1522         _root->addChild(sunLight);
1523
1524     // Clouds are added to the scene graph later
1525     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
1526     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
1527     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
1528     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
1529
1530     // enable disable specular highlights.
1531     // is the place where we might plug in an other fragment shader ...
1532     osg::LightModel* lightModel = new osg::LightModel;
1533     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
1534     stateSet->setAttribute(lightModel);
1535
1536     // switch to enable wireframe
1537     osg::PolygonMode* polygonMode = new osg::PolygonMode;
1538     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
1539     stateSet->setAttributeAndModes(polygonMode);
1540
1541     // scene fog handling
1542     osg::Fog* fog = new osg::Fog;
1543     fog->setUpdateCallback(new FGFogUpdateCallback);
1544     stateSet->setAttributeAndModes(fog);
1545     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
1546
1547     // plug in the GUI
1548     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
1549     if (guiCamera) {
1550
1551         osg::Geode* geode = new osg::Geode;
1552         geode->addDrawable(new SGPuDrawable);
1553         geode->addDrawable(new SGHUDDrawable);
1554         guiCamera->addChild(geode);
1555
1556
1557       guiCamera->addChild(FGPanelNode::create2DPanelNode());
1558     }
1559
1560     osg::Switch* sw = new osg::Switch;
1561     sw->setName("scenerySwitch");
1562     sw->setUpdateCallback(new FGScenerySwitchCallback);
1563     sw->addChild(_root.get());
1564     _viewerSceneRoot->addChild(sw);
1565     // The clouds are attached directly to the scene graph root
1566     // because, in theory, they don't want the same default state set
1567     // as the rest of the scene. This may not be true in practice.
1568         if ( _classicalRenderer ) {
1569                 _viewerSceneRoot->addChild(_sky->getCloudRoot());
1570                 _viewerSceneRoot->addChild(FGCreateRedoutNode());
1571         }
1572     // Attach empty program to the scene root so that shader programs
1573     // don't leak into state sets (effects) that shouldn't have one.
1574     stateSet = _viewerSceneRoot->getOrCreateStateSet();
1575     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
1576
1577     if ( !_classicalRenderer ) {
1578         _deferredRealRoot->addChild( _viewerSceneRoot.get() );
1579     }
1580 }
1581
1582 // Update all Visuals (redraws anything graphics related)
1583 void
1584 FGRenderer::update( ) {
1585     if (!_position_finalized || !_scenery_loaded->getBoolValue())
1586     {
1587         _splash_alpha->setDoubleValue(1.0);
1588         return;
1589     }
1590     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1591
1592     if (_splash_alpha->getDoubleValue()>0.0)
1593     {
1594         // Fade out the splash screen
1595         const double fade_time = 0.5;
1596         const double fade_steps_per_sec = 10;
1597         double delay_time = SGMiscd::min(fade_time/fade_steps_per_sec,
1598                                          (SGTimeStamp::now() - _splash_time).toSecs());
1599         _splash_time = SGTimeStamp::now();
1600         double sAlpha = _splash_alpha->getDoubleValue();
1601         sAlpha -= SGMiscd::max(0.0,delay_time/fade_time);
1602         FGScenerySwitchCallback::scenery_enabled = (sAlpha<1.0);
1603         _splash_alpha->setDoubleValue((sAlpha < 0) ? 0.0 : sAlpha);
1604     }
1605
1606     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
1607         if (!_classicalRenderer ) {
1608                 _ambientFactor->set( toOsg(l->scene_ambient()) );
1609                 _sunDiffuse->set( toOsg(l->scene_diffuse()) );
1610                 _sunSpecular->set( toOsg(l->scene_specular()) );
1611                 _sunDirection->set( osg::Vec3f(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]) );
1612         }
1613
1614     // update fog params
1615     double actual_visibility;
1616     if (_cloud_status->getBoolValue()) {
1617         actual_visibility = _sky->get_visibility();
1618     } else {
1619         actual_visibility = _visibility_m->getDoubleValue();
1620     }
1621
1622     // idle_state is now 1000 meaning we've finished all our
1623     // initializations and are running the main loop, so this will
1624     // now work without seg faulting the system.
1625
1626     FGViewer *current__view = globals->get_current_view();
1627     // Force update of center dependent values ...
1628     current__view->set_dirty();
1629
1630     osg::Camera *camera = viewer->getCamera();
1631
1632     if ( _textures->getBoolValue() ) {
1633         SGVec4f clearColor(l->adj_fog_color());
1634         camera->setClearColor(toOsg(clearColor));
1635     }
1636
1637     updateSky();
1638
1639     // need to call the update visitor once
1640     _frameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
1641     _updateVisitor->setViewData(current__view->getViewPosition(),
1642                                 current__view->getViewOrientation());
1643     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
1644     _updateVisitor->setLight(direction, l->scene_ambient(),
1645                              l->scene_diffuse(), l->scene_specular(),
1646                              l->adj_fog_color(),
1647                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
1648     _updateVisitor->setVisibility(actual_visibility);
1649     simgear::GroundLightManager::instance()->update(_updateVisitor.get());
1650     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
1651     cullMask |= simgear::GroundLightManager::instance()
1652         ->getLightNodeMask(_updateVisitor.get());
1653     if (_panel_hotspots->getBoolValue())
1654         cullMask |= simgear::PICK_BIT;
1655     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
1656         if ( !_classicalRenderer ) {
1657                 _fogColor->set( toOsg( l->adj_fog_color() ) );
1658                 _fogDensity->set( float( _updateVisitor->getFogExp2Density() ) );
1659         }
1660 }
1661
1662 void
1663 FGRenderer::updateSky()
1664 {
1665     // update fog params if visibility has changed
1666     double visibility_meters = _visibility_m->getDoubleValue();
1667     _sky->set_visibility(visibility_meters);
1668
1669     double altitude_m = _altitude_ft->getDoubleValue() * SG_FEET_TO_METER;
1670     _sky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
1671
1672     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
1673
1674     // The sun and moon distances are scaled down versions
1675     // of the actual distance to get both the moon and the sun
1676     // within the range of the far clip plane.
1677     // Moon distance:    384,467 kilometers
1678     // Sun distance: 150,000,000 kilometers
1679
1680     double sun_horiz_eff, moon_horiz_eff;
1681     if (_horizon_effect->getBoolValue()) {
1682         sun_horiz_eff
1683         = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
1684                                      0.0),
1685                      0.33) / 3.0;
1686         moon_horiz_eff
1687         = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
1688                                      0.0),
1689                      0.33)/3.0;
1690     } else {
1691         sun_horiz_eff = moon_horiz_eff = 1.0;
1692     }
1693
1694     SGSkyState sstate;
1695     sstate.pos       = globals->get_current_view()->getViewPosition();
1696     sstate.pos_geod  = globals->get_current_view()->getPosition();
1697     sstate.ori       = globals->get_current_view()->getViewOrientation();
1698     sstate.spin      = l->get_sun_rotation();
1699     sstate.gst       = globals->get_time_params()->getGst();
1700     sstate.sun_dist  = 50000.0 * sun_horiz_eff;
1701     sstate.moon_dist = 40000.0 * moon_horiz_eff;
1702     sstate.sun_angle = l->get_sun_angle();
1703
1704     SGSkyColor scolor;
1705     scolor.sky_color   = SGVec3f(l->sky_color().data());
1706     scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
1707     scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
1708     scolor.cloud_color = SGVec3f(l->cloud_color().data());
1709     scolor.sun_angle   = l->get_sun_angle();
1710     scolor.moon_angle  = l->get_moon_angle();
1711
1712     double delta_time_sec = _sim_delta_sec->getDoubleValue();
1713     _sky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
1714     _sky->repaint( scolor, *globals->get_ephem() );
1715 }
1716
1717 void
1718 FGRenderer::resize( int width, int height )
1719 {
1720     int curWidth = _xsize->getIntValue(),
1721         curHeight = _ysize->getIntValue();
1722     SG_LOG(SG_VIEW, SG_DEBUG, "FGRenderer::resize: new size " << width << " x " << height);
1723     if ((curHeight != height) || (curWidth != width)) {
1724     // must guard setting these, or PLIB-PUI fails with too many live interfaces
1725         _xsize->setIntValue(width);
1726         _ysize->setIntValue(height);
1727     }
1728 }
1729
1730 typedef osgUtil::LineSegmentIntersector::Intersection Intersection;
1731 SGVec2d uvFromIntersection(const Intersection& hit)
1732 {
1733   // Taken from http://trac.openscenegraph.org/projects/osg/browser/OpenSceneGraph/trunk/examples/osgmovie/osgmovie.cpp
1734
1735   osg::Drawable* drawable = hit.drawable.get();
1736   osg::Geometry* geometry = drawable ? drawable->asGeometry() : 0;
1737   osg::Vec3Array* vertices =
1738     geometry ? dynamic_cast<osg::Vec3Array*>(geometry->getVertexArray()) : 0;
1739
1740   if( !vertices )
1741   {
1742     SG_LOG(SG_INPUT, SG_WARN, "Unable to get vertices for intersection.");
1743     return SGVec2d(-9999,-9999);
1744   }
1745
1746   // get the vertex indices.
1747   const Intersection::IndexList& indices = hit.indexList;
1748   const Intersection::RatioList& ratios = hit.ratioList;
1749
1750   if( indices.size() != 3 || ratios.size() != 3 )
1751   {
1752     SG_LOG( SG_INPUT,
1753             SG_WARN,
1754             "Intersection has insufficient indices to work with." );
1755     return SGVec2d(-9999,-9999);
1756   }
1757
1758   unsigned int i1 = indices[0];
1759   unsigned int i2 = indices[1];
1760   unsigned int i3 = indices[2];
1761
1762   float r1 = ratios[0];
1763   float r2 = ratios[1];
1764   float r3 = ratios[2];
1765
1766   osg::Array* texcoords =
1767     (geometry->getNumTexCoordArrays() > 0) ? geometry->getTexCoordArray(0) : 0;
1768   osg::Vec2Array* texcoords_Vec2Array =
1769     dynamic_cast<osg::Vec2Array*>(texcoords);
1770
1771   if( !texcoords_Vec2Array )
1772   {
1773     SG_LOG(SG_INPUT, SG_WARN, "Unable to get texcoords for intersection.");
1774     return SGVec2d(-9999,-9999);
1775   }
1776
1777   // we have tex coord array so now we can compute the final tex coord at the
1778   // point of intersection.
1779   osg::Vec2 tc1 = (*texcoords_Vec2Array)[i1];
1780   osg::Vec2 tc2 = (*texcoords_Vec2Array)[i2];
1781   osg::Vec2 tc3 = (*texcoords_Vec2Array)[i3];
1782
1783   return toSG( osg::Vec2d(tc1 * r1 + tc2 * r2 + tc3 * r3) );
1784 }
1785
1786 bool
1787 FGRenderer::pick(std::vector<SGSceneryPick>& pickList, const osg::Vec2& windowPos)
1788 {
1789     // wipe out the return ...
1790     pickList.clear();
1791     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
1792     Intersections intersections;
1793
1794     if (!computeIntersections(CameraGroup::getDefault(), windowPos, intersections))
1795         return false;
1796     for (Intersections::iterator hit = intersections.begin(),
1797              e = intersections.end();
1798          hit != e;
1799          ++hit) {
1800         const osg::NodePath& np = hit->nodePath;
1801         osg::NodePath::const_reverse_iterator npi;
1802
1803         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1804             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1805             if (!ud || (ud->getNumPickCallbacks() == 0))
1806                 continue;
1807
1808             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1809                 SGPickCallback* pickCallback = ud->getPickCallback(i);
1810                 if (!pickCallback)
1811                     continue;
1812                 SGSceneryPick sceneryPick;
1813                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
1814                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
1815
1816                 if( pickCallback->needsUV() )
1817                   sceneryPick.info.uv = uvFromIntersection(*hit);
1818
1819                 sceneryPick.callback = pickCallback;
1820                 pickList.push_back(sceneryPick);
1821             } // of installed pick callbacks iteration
1822         } // of reverse node path walk
1823     }
1824
1825     return !pickList.empty();
1826 }
1827
1828 void
1829 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
1830 {
1831     viewer = viewer_;
1832 }
1833
1834 void
1835 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
1836 {
1837     eventHandler = eventHandler_;
1838 }
1839
1840 void
1841 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
1842 {
1843     _viewerSceneRoot->addChild(camera);
1844 }
1845
1846 void
1847 FGRenderer::removeCamera(osg::Camera* camera)
1848 {
1849     _viewerSceneRoot->removeChild(camera);
1850 }
1851
1852 void
1853 FGRenderer::setPlanes( double zNear, double zFar )
1854 {
1855         _planes->set( osg::Vec3f( - zFar, - zFar * zNear, zFar - zNear ) );
1856 }
1857
1858 bool
1859 fgDumpSceneGraphToFile(const char* filename)
1860 {
1861     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1862     return osgDB::writeNodeFile(*viewer->getSceneData(), filename);
1863 }
1864
1865 bool
1866 fgDumpTerrainBranchToFile(const char* filename)
1867 {
1868     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
1869                                  filename );
1870 }
1871
1872 // For debugging
1873 bool
1874 fgDumpNodeToFile(osg::Node* node, const char* filename)
1875 {
1876     return osgDB::writeNodeFile(*node, filename);
1877 }
1878
1879 namespace flightgear
1880 {
1881 using namespace osg;
1882
1883 class VisibleSceneInfoVistor : public NodeVisitor, CullStack
1884 {
1885 public:
1886     VisibleSceneInfoVistor()
1887         : NodeVisitor(CULL_VISITOR, TRAVERSE_ACTIVE_CHILDREN)
1888     {
1889         setCullingMode(CullSettings::SMALL_FEATURE_CULLING
1890                        | CullSettings::VIEW_FRUSTUM_CULLING);
1891         setComputeNearFarMode(CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1892     }
1893
1894     VisibleSceneInfoVistor(const VisibleSceneInfoVistor& rhs)
1895     {
1896     }
1897
1898     META_NodeVisitor("flightgear","VisibleSceneInfoVistor")
1899
1900     typedef std::map<const std::string,int> InfoMap;
1901
1902     void getNodeInfo(Node* node)
1903     {
1904         const char* typeName = typeid(*node).name();
1905         classInfo[typeName]++;
1906         const std::string& nodeName = node->getName();
1907         if (!nodeName.empty())
1908             nodeInfo[nodeName]++;
1909     }
1910
1911     void dumpInfo()
1912     {
1913         using namespace std;
1914         typedef vector<InfoMap::iterator> FreqVector;
1915         cout << "class info:\n";
1916         FreqVector classes;
1917         for (InfoMap::iterator itr = classInfo.begin(), end = classInfo.end();
1918              itr != end;
1919              ++itr)
1920             classes.push_back(itr);
1921         sort(classes.begin(), classes.end(), freqComp);
1922         for (FreqVector::iterator itr = classes.begin(), end = classes.end();
1923              itr != end;
1924              ++itr) {
1925             cout << (*itr)->first << " " << (*itr)->second << "\n";
1926         }
1927         cout << "\nnode info:\n";
1928         FreqVector nodes;
1929         for (InfoMap::iterator itr = nodeInfo.begin(), end = nodeInfo.end();
1930              itr != end;
1931              ++itr)
1932             nodes.push_back(itr);
1933
1934         sort (nodes.begin(), nodes.end(), freqComp);
1935         for (FreqVector::iterator itr = nodes.begin(), end = nodes.end();
1936              itr != end;
1937              ++itr) {
1938             cout << (*itr)->first << " " << (*itr)->second << "\n";
1939         }
1940         cout << endl;
1941     }
1942
1943     void doTraversal(Camera* camera, Node* root, Viewport* viewport)
1944     {
1945         ref_ptr<RefMatrix> projection
1946             = createOrReuseMatrix(camera->getProjectionMatrix());
1947         ref_ptr<RefMatrix> mv = createOrReuseMatrix(camera->getViewMatrix());
1948         if (!viewport)
1949             viewport = camera->getViewport();
1950         if (viewport)
1951             pushViewport(viewport);
1952         pushProjectionMatrix(projection.get());
1953         pushModelViewMatrix(mv.get(), Transform::ABSOLUTE_RF);
1954         root->accept(*this);
1955         popModelViewMatrix();
1956         popProjectionMatrix();
1957         if (viewport)
1958             popViewport();
1959         dumpInfo();
1960     }
1961
1962     void apply(Node& node)
1963     {
1964         if (isCulled(node))
1965             return;
1966         pushCurrentMask();
1967         getNodeInfo(&node);
1968         traverse(node);
1969         popCurrentMask();
1970     }
1971     void apply(Group& node)
1972     {
1973         if (isCulled(node))
1974             return;
1975         pushCurrentMask();
1976         getNodeInfo(&node);
1977         traverse(node);
1978         popCurrentMask();
1979     }
1980
1981     void apply(Transform& node)
1982     {
1983         if (isCulled(node))
1984             return;
1985         pushCurrentMask();
1986         ref_ptr<RefMatrix> matrix = createOrReuseMatrix(*getModelViewMatrix());
1987         node.computeLocalToWorldMatrix(*matrix,this);
1988         pushModelViewMatrix(matrix.get(), node.getReferenceFrame());
1989         getNodeInfo(&node);
1990         traverse(node);
1991         popModelViewMatrix();
1992         popCurrentMask();
1993     }
1994
1995     void apply(Camera& camera)
1996     {
1997         // Save current cull settings
1998         CullSettings saved_cull_settings(*this);
1999
2000         // set cull settings from this Camera
2001         setCullSettings(camera);
2002         // inherit the settings from above
2003         inheritCullSettings(saved_cull_settings, camera.getInheritanceMask());
2004
2005         // set the cull mask.
2006         unsigned int savedTraversalMask = getTraversalMask();
2007         bool mustSetCullMask = (camera.getInheritanceMask()
2008                                 & osg::CullSettings::CULL_MASK) == 0;
2009         if (mustSetCullMask)
2010             setTraversalMask(camera.getCullMask());
2011
2012         osg::RefMatrix* projection = 0;
2013         osg::RefMatrix* modelview = 0;
2014
2015         if (camera.getReferenceFrame()==osg::Transform::RELATIVE_RF) {
2016             if (camera.getTransformOrder()==osg::Camera::POST_MULTIPLY) {
2017                 projection = createOrReuseMatrix(*getProjectionMatrix()
2018                                                  *camera.getProjectionMatrix());
2019                 modelview = createOrReuseMatrix(*getModelViewMatrix()
2020                                                 * camera.getViewMatrix());
2021             }
2022             else {              // pre multiply
2023                 projection = createOrReuseMatrix(camera.getProjectionMatrix()
2024                                                  * (*getProjectionMatrix()));
2025                 modelview = createOrReuseMatrix(camera.getViewMatrix()
2026                                                 * (*getModelViewMatrix()));
2027             }
2028         } else {
2029             // an absolute reference frame
2030             projection = createOrReuseMatrix(camera.getProjectionMatrix());
2031             modelview = createOrReuseMatrix(camera.getViewMatrix());
2032         }
2033         if (camera.getViewport())
2034             pushViewport(camera.getViewport());
2035
2036         pushProjectionMatrix(projection);
2037         pushModelViewMatrix(modelview, camera.getReferenceFrame());
2038
2039         traverse(camera);
2040
2041         // restore the previous model view matrix.
2042         popModelViewMatrix();
2043
2044         // restore the previous model view matrix.
2045         popProjectionMatrix();
2046
2047         if (camera.getViewport()) popViewport();
2048
2049         // restore the previous traversal mask settings
2050         if (mustSetCullMask)
2051             setTraversalMask(savedTraversalMask);
2052
2053         // restore the previous cull settings
2054         setCullSettings(saved_cull_settings);
2055     }
2056
2057 protected:
2058     // sort in reverse
2059     static bool freqComp(const InfoMap::iterator& lhs, const InfoMap::iterator& rhs)
2060     {
2061         return lhs->second > rhs->second;
2062     }
2063     InfoMap classInfo;
2064     InfoMap nodeInfo;
2065 };
2066
2067 bool printVisibleSceneInfo(FGRenderer* renderer)
2068 {
2069     osgViewer::Viewer* viewer = renderer->getViewer();
2070     VisibleSceneInfoVistor vsv;
2071     Viewport* vp = 0;
2072     if (!viewer->getCamera()->getViewport() && viewer->getNumSlaves() > 0) {
2073         const View::Slave& slave = viewer->getSlave(0);
2074         vp = slave._camera->getViewport();
2075     }
2076     vsv.doTraversal(viewer->getCamera(), viewer->getSceneData(), vp);
2077     return true;
2078 }
2079
2080 }
2081 // end of renderer.cxx
2082