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 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 390 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 391
 392 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 393 static osg::ref_ptr<osg::Group> mDeferredRealRoot = new osg::Group;
 394
 395 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 396
 397 #ifdef FG_JPEG_SERVER
 398 static void updateRenderer()
 399 {
 400     globals->get_renderer()->update();
 401 }
 402 #endif
 403
 404 FGRenderer::FGRenderer() :
 405     _sky(NULL),
 406     _ambientFactor( new osg::Uniform( "fg_SunAmbientColor", osg::Vec4f() ) ),
 407     _sunDiffuse( new osg::Uniform( "fg_SunDiffuseColor", osg::Vec4f() ) ),
 408     _sunSpecular( new osg::Uniform( "fg_SunSpecularColor", osg::Vec4f() ) ),
 409     _sunDirection( new osg::Uniform( "fg_SunDirection", osg::Vec3f() ) ),
 410     _planes( new osg::Uniform( "fg_Planes", osg::Vec3f() ) ),
 411     _fogColor( new osg::Uniform( "fg_FogColor", osg::Vec4f(1.0, 1.0, 1.0, 1.0) ) ),
 412     _fogDensity( new osg::Uniform( "fg_FogDensity", 0.0001f ) ),
 413     _shadowNumber( new osg::Uniform( "fg_ShadowNumber", (int)4 ) ),
 414     _shadowDistances( new osg::Uniform( "fg_ShadowDistances", osg::Vec4f(5.0, 50.0, 500.0, 5000.0 ) ) ),
 415     _depthInColor( new osg::Uniform( "fg_DepthInColor", false ) )
 416 {
 417 #ifdef FG_JPEG_SERVER
 418    jpgRenderFrame = updateRenderer;
 419 #endif
 420
 421     // it's not the real root, whatever that means
 422     mRoot->setName("fakeRoot");
 423
 424    _numCascades = 4;
 425    _cascadeFar[0] = 5.f;
 426    _cascadeFar[1] = 50.f;
 427    _cascadeFar[2] = 500.f;
 428    _cascadeFar[3] = 5000.f;
 429 }
 430
 431 FGRenderer::~FGRenderer()
 432 {
 433     DeletionManager::uninstall(mRealRoot.get());
 434 #ifdef FG_JPEG_SERVER
 435    jpgRenderFrame = NULL;
 436 #endif
 437     delete _sky;
 438 }
 439
 440 // Initialize various GL/view parameters
 441 // XXX This should be called "preinit" or something, as it initializes
 442 // critical parts of the scene graph in addition to the splash screen.
 443 void
 444 FGRenderer::splashinit( void ) {
 445     osgViewer::Viewer* viewer = getViewer();
 446     viewer->setName("osgViewer");
 447     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 448     mRealRoot->setName("realRoot");
 449
 450     ref_ptr<Node> splashNode = fgCreateSplashNode();
 451     if (_classicalRenderer) {
 452         mRealRoot->addChild(splashNode.get());
 453     } else {
 454         for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
 455                 ii != CameraGroup::getDefault()->camerasEnd();
 456                 ++ii )
 457         {
 458             CameraInfo* info = ii->get();
 459             Camera* camera = info->getCamera(DISPLAY_CAMERA);
 460             if (camera == 0) continue;
 461
 462             camera->addChild(splashNode.get());
 463         }
 464     }
 465     mFrameStamp = viewer->getFrameStamp();
 466     // Scene doesn't seem to pass the frame stamp to the update
 467     // visitor automatically.
 468     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 469     viewer->setUpdateVisitor(mUpdateVisitor.get());
 470     fgSetDouble("/sim/startup/splash-alpha", 1.0);
 471 }
 472
 473 class ShadowMapSizeListener : public SGPropertyChangeListener {
 474 public:
 475     virtual void valueChanged(SGPropertyNode* node) {
 476         globals->get_renderer()->updateShadowMapSize(node->getIntValue());
 477     }
 478 };
 479
 480 class ShadowEnabledListener : public SGPropertyChangeListener {
 481 public:
 482     virtual void valueChanged(SGPropertyNode* node) {
 483         globals->get_renderer()->enableShadows(node->getBoolValue());
 484     }
 485 };
 486
 487 class ShadowNumListener : public SGPropertyChangeListener {
 488 public:
 489     virtual void valueChanged(SGPropertyNode* node) {
 490         globals->get_renderer()->updateCascadeNumber(node->getIntValue());
 491     }
 492 };
 493
 494 class ShadowRangeListener : public SGPropertyChangeListener {
 495 public:
 496     virtual void valueChanged(SGPropertyNode* node) {
 497         globals->get_renderer()->updateCascadeFar(node->getIndex(), node->getFloatValue());
 498     }
 499 };
 500
 501 void
 502 FGRenderer::init( void )
 503 {
 504     if (!eventHandler)
 505         eventHandler = new FGEventHandler();
 506
 507     sgUserDataInit( globals->get_props() );
 508
 509     _classicalRenderer = !fgGetBool("/sim/rendering/rembrandt/enabled", false);
 510     _shadowMapSize    = fgGetInt( "/sim/rendering/shadows/map-size", 4096 );
 511     fgAddChangeListener( new ShadowMapSizeListener, "/sim/rendering/shadows/map-size" );
 512     fgAddChangeListener( new ShadowEnabledListener, "/sim/rendering/shadows/enabled" );
 513     ShadowRangeListener* srl = new ShadowRangeListener;
 514     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[0]");
 515     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[1]");
 516     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[2]");
 517     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[3]");
 518     fgAddChangeListener(new ShadowNumListener, "/sim/rendering/shadows/num-cascades");
 519     _numCascades = fgGetInt("/sim/rendering/shadows/num-cascades", 4);
 520     _cascadeFar[0] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[0]", 5.0f);
 521     _cascadeFar[1] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[1]", 50.0f);
 522     _cascadeFar[2] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[2]", 500.0f);
 523     _cascadeFar[3] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[3]", 5000.0f);
 524     updateCascadeNumber(_numCascades);
 525     updateCascadeFar(0, _cascadeFar[0]);
 526     updateCascadeFar(1, _cascadeFar[1]);
 527     updateCascadeFar(2, _cascadeFar[2]);
 528     updateCascadeFar(3, _cascadeFar[3]);
 529     _useColorForDepth = fgGetBool( "/sim/rendering/rembrandt/use-color-for-depth", false );
 530     _depthInColor->set( _useColorForDepth );
 531
 532     _renderer         = fgGetString("/sim/rendering/rembrandt/renderer", "default-pipeline");
 533     if (!_classicalRenderer)
 534         _pipeline = makeRenderingPipeline(_renderer, 0);
 535     _scenery_loaded   = fgGetNode("/sim/sceneryloaded", true);
 536     _position_finalized = fgGetNode("/sim/position-finalized", true);
 537
 538     _panel_hotspots   = fgGetNode("/sim/panel-hotspots", true);
 539     _virtual_cockpit  = fgGetNode("/sim/virtual-cockpit", true);
 540
 541     _sim_delta_sec = fgGetNode("/sim/time/delta-sec", true);
 542
 543     _xsize         = fgGetNode("/sim/startup/xsize", true);
 544     _ysize         = fgGetNode("/sim/startup/ysize", true);
 545     _splash_alpha  = fgGetNode("/sim/startup/splash-alpha", true);
 546
 547     _skyblend             = fgGetNode("/sim/rendering/skyblend", true);
 548     _point_sprites        = fgGetNode("/sim/rendering/point-sprites", true);
 549     _enhanced_lighting    = fgGetNode("/sim/rendering/enhanced-lighting", true);
 550     _distance_attenuation = fgGetNode("/sim/rendering/distance-attenuation", true);
 551     _horizon_effect       = fgGetNode("/sim/rendering/horizon-effect", true);
 552     _textures             = fgGetNode("/sim/rendering/textures", true);
 553
 554     _altitude_ft = fgGetNode("/position/altitude-ft", true);
 555
 556     _cloud_status = fgGetNode("/environment/clouds/status", true);
 557     _visibility_m = fgGetNode("/environment/visibility-m", true);
 558
 559     bool use_point_sprites = _point_sprites->getBoolValue();
 560     bool enhanced_lighting = _enhanced_lighting->getBoolValue();
 561     bool distance_attenuation = _distance_attenuation->getBoolValue();
 562
 563     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 564                                   distance_attenuation );
 565
 566     if (const char* tc = fgGetString("/sim/rendering/texture-compression", NULL)) {
 567       if (strcmp(tc, "false") == 0 || strcmp(tc, "off") == 0 ||
 568           strcmp(tc, "0") == 0 || strcmp(tc, "no") == 0 ||
 569           strcmp(tc, "none") == 0) {
 570         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::DoNotUseCompression);
 571       } else if (strcmp(tc, "arb") == 0) {
 572         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseARBCompression);
 573       } else if (strcmp(tc, "dxt1") == 0) {
 574         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT1Compression);
 575       } else if (strcmp(tc, "dxt3") == 0) {
 576         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT3Compression);
 577       } else if (strcmp(tc, "dxt5") == 0) {
 578         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT5Compression);
 579       } else {
 580         SG_LOG(SG_VIEW, SG_WARN, "Unknown texture compression setting!");
 581       }
 582     }
 583
 584 // create sky, but can't build until setupView, since we depend
 585 // on other subsystems to be inited, eg Ephemeris
 586     _sky = new SGSky;
 587
 588     SGPath texture_path(globals->get_fg_root());
 589     texture_path.append("Textures");
 590     texture_path.append("Sky");
 591     for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
 592         SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
 593         _sky->add_cloud_layer(layer);
 594     }
 595
 596     _sky->texture_path( texture_path.str() );
 597
 598     if (!_classicalRenderer) {
 599         eventHandler->setChangeStatsCameraRenderOrder( true );
 600         _sky->set_minimum_sky_visibility( 0.0 ); // A black sky appears for below that
 601     }
 602 }
 603
 604 void installCullVisitor(Camera* camera)
 605 {
 606     osgViewer::Renderer* renderer
 607         = static_cast<osgViewer::Renderer*>(camera->getRenderer());
 608     for (int i = 0; i < 2; ++i) {
 609         osgUtil::SceneView* sceneView = renderer->getSceneView(i);
 610
 611         osg::ref_ptr<osgUtil::CullVisitor::Identifier> identifier;
 612         identifier = sceneView->getCullVisitor()->getIdentifier();
 613         sceneView->setCullVisitor(new simgear::EffectCullVisitor);
 614         sceneView->getCullVisitor()->setIdentifier(identifier.get());
 615
 616         identifier = sceneView->getCullVisitorLeft()->getIdentifier();
 617         sceneView->setCullVisitorLeft(sceneView->getCullVisitor()->clone());
 618         sceneView->getCullVisitorLeft()->setIdentifier(identifier.get());
 619
 620         identifier = sceneView->getCullVisitorRight()->getIdentifier();
 621         sceneView->setCullVisitorRight(sceneView->getCullVisitor()->clone());
 622         sceneView->getCullVisitorRight()->setIdentifier(identifier.get());
 623
 624     }
 625 }
 626
 627 CameraInfo*
 628 FGRenderer::buildRenderingPipeline(CameraGroup* cgroup, unsigned flags, Camera* camera,
 629                                    const Matrix& view,
 630                                    const Matrix& projection,
 631                                                                    osg::GraphicsContext* gc,
 632                                    bool useMasterSceneData)
 633 {
 634         CameraInfo* info = 0;
 635         if (!_classicalRenderer && (flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0)
 636                 info = buildDeferredPipeline( cgroup, flags, camera, view, projection, gc );
 637
 638         if (info) {
 639                 return info;
 640         } else {
 641                 if ((flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0)
 642                         _classicalRenderer = true;
 643                 return buildClassicalPipeline( cgroup, flags, camera, view, projection, useMasterSceneData );
 644         }
 645 }
 646
 647 CameraInfo*
 648 FGRenderer::buildClassicalPipeline(CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
 649                                 const osg::Matrix& view,
 650                                 const osg::Matrix& projection,
 651                                 bool useMasterSceneData)
 652 {
 653     CameraInfo* info = new CameraInfo(flags);
 654     // The camera group will always update the camera
 655     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
 656     info->name = "classic";
 657
 658     Camera* farCamera = 0;
 659     if ((flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0) {
 660         farCamera = new Camera;
 661         farCamera->setName("farCamera");
 662         farCamera->setAllowEventFocus(camera->getAllowEventFocus());
 663         farCamera->setGraphicsContext(camera->getGraphicsContext());
 664         farCamera->setCullingMode(camera->getCullingMode());
 665         farCamera->setInheritanceMask(camera->getInheritanceMask());
 666         farCamera->setReferenceFrame(Transform::ABSOLUTE_RF);
 667         // Each camera's viewport is written when the window is
 668         // resized; if the the viewport isn't copied here, it gets updated
 669         // twice and ends up with the wrong value.
 670         farCamera->setViewport(simgear::clone(camera->getViewport()));
 671         farCamera->setDrawBuffer(camera->getDrawBuffer());
 672         farCamera->setReadBuffer(camera->getReadBuffer());
 673         farCamera->setRenderTargetImplementation(
 674             camera->getRenderTargetImplementation());
 675         const Camera::BufferAttachmentMap& bufferMap
 676             = camera->getBufferAttachmentMap();
 677         if (bufferMap.count(Camera::COLOR_BUFFER) != 0) {
 678             farCamera->attach(
 679                 Camera::COLOR_BUFFER,
 680                 bufferMap.find(Camera::COLOR_BUFFER)->second._texture.get());
 681         }
 682         cgroup->getViewer()->addSlave(farCamera, projection, view, useMasterSceneData);
 683         installCullVisitor(farCamera);
 684                 int farSlaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
 685                 info->addCamera( FAR_CAMERA, farCamera, farSlaveIndex );
 686         farCamera->setRenderOrder(Camera::POST_RENDER, farSlaveIndex);
 687         camera->setCullMask(camera->getCullMask() & ~simgear::BACKGROUND_BIT);
 688         camera->setClearMask(GL_DEPTH_BUFFER_BIT);
 689     }
 690     cgroup->getViewer()->addSlave(camera, projection, view, useMasterSceneData);
 691     installCullVisitor(camera);
 692     int slaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
 693     info->addCamera( MAIN_CAMERA, camera, slaveIndex );
 694     camera->setRenderOrder(Camera::POST_RENDER, slaveIndex);
 695     cgroup->addCamera(info);
 696     return info;
 697 }
 698
 699 class FGDeferredRenderingCameraCullCallback : public osg::NodeCallback {
 700 public:
 701     FGDeferredRenderingCameraCullCallback( const std::string& k, CameraInfo* i, bool nd = false ) : kind( k ), info( i ), needsDuDv(nd) {}
 702     virtual void operator()( osg::Node *n, osg::NodeVisitor *nv) {
 703         simgear::EffectCullVisitor* cv = dynamic_cast<simgear::EffectCullVisitor*>(nv);
 704         osg::Camera* camera = static_cast<osg::Camera*>(n);
 705
 706         cv->clearBufferList();
 707         for (RenderBufferMap::iterator ii = info->buffers.begin(); ii != info->buffers.end(); ++ii) {
 708             cv->addBuffer(ii->first, ii->second.texture);
 709         }
 710
 711         if ( !info->getRenderStageInfo(kind).fullscreen )
 712             info->setMatrices( camera );
 713
 714         if (needsDuDv) {
 715             osg::Matrix projInverse;
 716             info->projInverse->get( projInverse );
 717
 718             osg::Vec4 p0 = osg::Vec4( -1.0, -1.0, 0.0, 1.0 ) * projInverse;
 719             info->du->set( osg::Vec4(  1.0, -1.0, 0.0, 1.0 ) * projInverse - p0 );
 720             info->dv->set( osg::Vec4( -1.0,  1.0, 0.0, 1.0 ) * projInverse - p0 );
 721         }
 722
 723         cv->traverse( *camera );
 724
 725         if ( kind == GEOMETRY_CAMERA ) {
 726             // Remove transparent bins. They will be renderer in the additional light stage (side effect)
 727             osgUtil::RenderStage* renderStage = cv->getRenderStage();
 728             osgUtil::RenderBin::RenderBinList& rbl = renderStage->getRenderBinList();
 729             for (osgUtil::RenderBin::RenderBinList::iterator rbi = rbl.begin(); rbi != rbl.end(); ) {
 730                 if (rbi->second->getSortMode() == osgUtil::RenderBin::SORT_BACK_TO_FRONT) {
 731                     rbl.erase( rbi++ );
 732                 } else {
 733                     ++rbi;
 734                 }
 735             }
 736         } else if ( kind == LIGHTING_CAMERA ) {
 737             osg::ref_ptr<osg::Camera> mainShadowCamera = info->getCamera( SHADOW_CAMERA );
 738             if (mainShadowCamera.valid()) {
 739                 osg::Switch* grp = mainShadowCamera->getChild(0)->asSwitch();
 740                 for (int i = 0; i < 4; ++i ) {
 741                     if (!grp->getValue(i))
 742                         continue;
 743
 744                     osg::Camera* cascadeCam = static_cast<osg::Camera*>( grp->getChild(i) );
 745                     osg::Matrixf shadowMatrix = camera->getInverseViewMatrix() *
 746                                                 cascadeCam->getViewMatrix() *
 747                                                 cascadeCam->getProjectionMatrix() *
 748                                                 osg::Matrix::translate(1.0, 1.0, 1.0) *
 749                                                 osg::Matrix::scale(0.5f, 0.5f, 0.5f);
 750
 751                     info->shadowMatrix[i]->set( shadowMatrix );
 752                 }
 753             }
 754         }
 755     }
 756
 757 private:
 758     std::string kind;
 759     CameraInfo* info;
 760     bool needsDuDv;
 761 };
 762
 763 osg::Texture2D* buildDeferredBuffer(GLint internalFormat, GLenum sourceFormat, GLenum sourceType, GLenum wrapMode, bool shadowComparison = false)
 764 {
 765     osg::Texture2D* tex = new osg::Texture2D;
 766     tex->setResizeNonPowerOfTwoHint( false );
 767     tex->setInternalFormat( internalFormat );
 768     tex->setShadowComparison(shadowComparison);
 769     if (shadowComparison) {
 770         tex->setShadowTextureMode(osg::Texture2D::LUMINANCE);
 771         tex->setBorderColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
 772     }
 773     tex->setSourceFormat(sourceFormat);
 774     tex->setSourceType(sourceType);
 775     tex->setFilter( osg::Texture2D::MIN_FILTER, osg::Texture2D::LINEAR );
 776     tex->setFilter( osg::Texture2D::MAG_FILTER, osg::Texture2D::LINEAR );
 777     tex->setWrap( osg::Texture::WRAP_S, (osg::Texture::WrapMode)wrapMode );
 778     tex->setWrap( osg::Texture::WRAP_T, (osg::Texture::WrapMode)wrapMode );
 779         return tex;
 780 }
 781
 782 void attachBufferToCamera( CameraInfo* info, osg::Camera* camera, osg::Camera::BufferComponent c, const std::string& ck, const std::string& bk )
 783 {
 784     camera->attach( c, info->getBuffer(bk) );
 785     info->getRenderStageInfo(ck).buffers.insert( std::make_pair( c, bk ) );
 786 }
 787
 788 void buildAttachments(CameraInfo* info, osg::Camera* camera, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments) {
 789     BOOST_FOREACH(ref_ptr<FGRenderingPipeline::Attachment> attachment, attachments) {
 790         if (attachment->valid())
 791             attachBufferToCamera( info, camera, attachment->component, name, attachment->buffer );
 792     }
 793 }
 794
 795 osg::Camera* FGRenderer::buildDeferredGeometryCamera( CameraInfo* info, osg::GraphicsContext* gc, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments )
 796 {
 797     osg::Camera* camera = new osg::Camera;
 798     info->addCamera(name, camera );
 799
 800     camera->setCullMask( ~simgear::MODELLIGHT_BIT );
 801     camera->setName( "GeometryC" );
 802     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
 803     camera->setGraphicsContext( gc );
 804     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( name, info ) );
 805     camera->setClearMask( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
 806     camera->setClearColor( osg::Vec4( 0., 0., 0., 0. ) );
 807     camera->setClearDepth( 1.0 );
 808     camera->setColorMask(true, true, true, true);
 809     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
 810     camera->setRenderOrder(osg::Camera::NESTED_RENDER, 0);
 811     camera->setViewport( new osg::Viewport );
 812     buildAttachments(info, camera, name, attachments);
 813     camera->setDrawBuffer(GL_FRONT);
 814     camera->setReadBuffer(GL_FRONT);
 815
 816     osg::StateSet* ss = camera->getOrCreateStateSet();
 817     ss->addUniform( _depthInColor );
 818
 819     camera->addChild( mDeferredRealRoot.get() );
 820
 821     return camera;
 822 }
 823
 824 static void setShadowCascadeStateSet( osg::Camera* cam ) {
 825     osg::StateSet* ss = cam->getOrCreateStateSet();
 826     ss->setAttribute( new osg::PolygonOffset( 1.1f, 5.0f ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 827     ss->setMode( GL_POLYGON_OFFSET_FILL, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 828     ss->setRenderBinDetails( 0, "RenderBin", osg::StateSet::OVERRIDE_RENDERBIN_DETAILS );
 829     ss->setAttributeAndModes( new osg::AlphaFunc( osg::AlphaFunc::GREATER, 0.05 ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 830     ss->setAttributeAndModes( new osg::ColorMask( false, false, false, false ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 831     ss->setAttributeAndModes( new osg::CullFace( osg::CullFace::FRONT ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 832     osg::Program* program = new osg::Program;
 833     ss->setAttribute( program, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON );
 834     ss->setMode( GL_LIGHTING, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 835     ss->setMode( GL_BLEND, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 836     //ss->setTextureMode( 0, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON );
 837     ss->setTextureMode( 0, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 838     ss->setTextureMode( 1, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 839     ss->setTextureMode( 1, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 840     ss->setTextureMode( 2, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 841     ss->setTextureMode( 2, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 842 }
 843
 844 static osg::Camera* createShadowCascadeCamera( int no, int cascadeSize ) {
 845     osg::Camera* cascadeCam = new osg::Camera;
 846     setShadowCascadeStateSet( cascadeCam );
 847
 848     std::ostringstream oss;
 849     oss << "CascadeCamera" << (no + 1);
 850     cascadeCam->setName( oss.str() );
 851     cascadeCam->setClearMask(0);
 852     cascadeCam->setCullMask( simgear::CASTSHADOW_BIT );
 853     cascadeCam->setCullingMode( cascadeCam->getCullingMode() | osg::CullSettings::SMALL_FEATURE_CULLING );
 854     cascadeCam->setAllowEventFocus(false);
 855     cascadeCam->setReferenceFrame(osg::Transform::ABSOLUTE_RF_INHERIT_VIEWPOINT);
 856     cascadeCam->setRenderOrder(osg::Camera::NESTED_RENDER);
 857     cascadeCam->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 858     cascadeCam->setViewport( int( no / 2 ) * cascadeSize, (no & 1) * cascadeSize, cascadeSize, cascadeSize );
 859     return cascadeCam;
 860 }
 861
 862 osg::Camera* FGRenderer::buildDeferredShadowCamera( CameraInfo* info, osg::GraphicsContext* gc, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments )
 863 {
 864     osg::Camera* mainShadowCamera = new osg::Camera;
 865     info->addCamera(name, mainShadowCamera, 0.0f );
 866
 867     mainShadowCamera->setName( "ShadowC" );
 868     mainShadowCamera->setClearMask( GL_DEPTH_BUFFER_BIT );
 869     mainShadowCamera->setClearDepth( 1.0 );
 870     mainShadowCamera->setAllowEventFocus(false);
 871     mainShadowCamera->setGraphicsContext(gc);
 872     mainShadowCamera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
 873     buildAttachments(info, mainShadowCamera, name, attachments);
 874     mainShadowCamera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
 875     mainShadowCamera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
 876     mainShadowCamera->setProjectionMatrix(osg::Matrix::identity());
 877     mainShadowCamera->setCullingMode( osg::CullSettings::NO_CULLING );
 878     mainShadowCamera->setViewport( 0, 0, _shadowMapSize, _shadowMapSize );
 879     mainShadowCamera->setDrawBuffer(GL_FRONT);
 880     mainShadowCamera->setReadBuffer(GL_FRONT);
 881     mainShadowCamera->setRenderOrder(Camera::NESTED_RENDER, 1);
 882
 883     osg::Switch* shadowSwitch = new osg::Switch;
 884     mainShadowCamera->addChild( shadowSwitch );
 885
 886     for (int i = 0; i < 4; ++i ) {
 887         osg::Camera* cascadeCam = createShadowCascadeCamera( i, _shadowMapSize/2 );
 888         cascadeCam->addChild( mDeferredRealRoot.get() );
 889         shadowSwitch->addChild( cascadeCam );
 890     }
 891     if (fgGetBool("/sim/rendering/shadows/enabled", true))
 892         shadowSwitch->setAllChildrenOn();
 893     else
 894         shadowSwitch->setAllChildrenOff();
 895
 896     return mainShadowCamera;
 897 }
 898
 899 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)
 900 {
 901     osg::Camera* cascade = static_cast<osg::Camera*>( grp->getChild(idx) );
 902     osg::Matrixd &viewMatrix = cascade->getViewMatrix();
 903     osg::Matrixd &projectionMatrix = cascade->getProjectionMatrix();
 904
 905     osg::BoundingSphere bs;
 906     bs.expandBy(osg::Vec3(left,bottom,-zNear) * f1);
 907     bs.expandBy(osg::Vec3(right,top,-zNear) * f2);
 908     bs.expandBy(osg::Vec3(left,bottom,-zNear) * f2);
 909     bs.expandBy(osg::Vec3(right,top,-zNear) * f1);
 910
 911     osg::Vec4 aim = osg::Vec4(bs.center(), 1.0) * camera->getInverseViewMatrix();
 912
 913     projectionMatrix.makeOrtho( -bs.radius(), bs.radius(), -bs.radius(), bs.radius(), 1., 15000.0 );
 914     osg::Vec3 position( aim.x(), aim.y(), aim.z() );
 915     viewMatrix.makeLookAt( position + (getSunDirection() * 10000.0), position, position );
 916 }
 917
 918 osg::Vec3 FGRenderer::getSunDirection() const
 919 {
 920     osg::Vec3 val;
 921     _sunDirection->get( val );
 922     return val;
 923 }
 924
 925 void FGRenderer::updateShadowCamera(const CameraInfo* info, const osg::Vec3d& position)
 926 {
 927     ref_ptr<Camera> mainShadowCamera = info->getCamera( SHADOW_CAMERA );
 928     if (mainShadowCamera.valid()) {
 929         ref_ptr<Switch> shadowSwitch = mainShadowCamera->getChild( 0 )->asSwitch();
 930         osg::Vec3d up = position,
 931             dir = getSunDirection();
 932         up.normalize();
 933         dir.normalize();
 934         // cos(100 deg) == -0.17
 935         if (up * dir < -0.17 || !fgGetBool("/sim/rendering/shadows/enabled", true)) {
 936             shadowSwitch->setAllChildrenOff();
 937         } else {
 938             double left,right,bottom,top,zNear,zFar;
 939             ref_ptr<Camera> camera = info->getCamera(GEOMETRY_CAMERA);
 940             camera->getProjectionMatrix().getFrustum(left,right,bottom,top,zNear,zFar);
 941
 942             shadowSwitch->setAllChildrenOn();
 943             if (_numCascades == 1) {
 944                 osg::Camera* cascadeCam = static_cast<osg::Camera*>( shadowSwitch->getChild(0) );
 945                 cascadeCam->setViewport( 0, 0, _shadowMapSize, _shadowMapSize );
 946             } else {
 947                 for (int no = 0; no < 4; ++no) {
 948                     osg::Camera* cascadeCam = static_cast<osg::Camera*>( shadowSwitch->getChild(no) );
 949                     cascadeCam->setViewport( int( no / 2 ) * (_shadowMapSize/2), (no & 1) * (_shadowMapSize/2), (_shadowMapSize/2), (_shadowMapSize/2) );
 950                 }
 951             }
 952             updateShadowCascade(info, camera, shadowSwitch, 0, left, right, bottom, top, zNear, 1.0, _cascadeFar[0]/zNear);
 953             if (_numCascades > 1) {
 954                 shadowSwitch->setValue(1, true);
 955                 updateShadowCascade(info, camera, shadowSwitch, 1, left, right, bottom, top, zNear, _cascadeFar[0]/zNear, _cascadeFar[1]/zNear);
 956             } else {
 957                 shadowSwitch->setValue(1, false);
 958             }
 959             if (_numCascades > 2) {
 960                 shadowSwitch->setValue(2, true);
 961                 updateShadowCascade(info, camera, shadowSwitch, 2, left, right, bottom, top, zNear, _cascadeFar[1]/zNear, _cascadeFar[2]/zNear);
 962             } else {
 963                 shadowSwitch->setValue(2, false);
 964             }
 965             if (_numCascades > 3) {
 966                 shadowSwitch->setValue(3, true);
 967                 updateShadowCascade(info, camera, shadowSwitch, 3, left, right, bottom, top, zNear, _cascadeFar[2]/zNear, _cascadeFar[3]/zNear);
 968             } else {
 969                 shadowSwitch->setValue(3, false);
 970             }
 971             {
 972             osg::Matrixd &viewMatrix = mainShadowCamera->getViewMatrix();
 973
 974             osg::Vec4 aim = osg::Vec4( 0.0, 0.0, 0.0, 1.0 ) * camera->getInverseViewMatrix();
 975
 976             osg::Vec3 position( aim.x(), aim.y(), aim.z() );
 977             viewMatrix.makeLookAt( position, position + (getSunDirection() * 10000.0), position );
 978             }
 979         }
 980     }
 981 }
 982
 983 void FGRenderer::updateShadowMapSize(int mapSize)
 984 {
 985     if ( ((~( mapSize-1 )) & mapSize) != mapSize ) {
 986         SG_LOG( SG_VIEW, SG_ALERT, "Map size is not a power of two" );
 987         return;
 988     }
 989     for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
 990             ii != CameraGroup::getDefault()->camerasEnd();
 991             ++ii )
 992     {
 993         CameraInfo* info = ii->get();
 994         Camera* camera = info->getCamera(SHADOW_CAMERA);
 995         if (camera == 0) continue;
 996
 997         Texture2D* tex = info->getBuffer("shadow");
 998         if (tex == 0) continue;
 999
1000         tex->setTextureSize( mapSize, mapSize );
1001         tex->dirtyTextureObject();
1002
1003         Viewport* vp = camera->getViewport();
1004         vp->width() = mapSize;
1005         vp->height() = mapSize;
1006
1007         osgViewer::Renderer* renderer
1008             = static_cast<osgViewer::Renderer*>(camera->getRenderer());
1009         for (int i = 0; i < 2; ++i) {
1010             osgUtil::SceneView* sceneView = renderer->getSceneView(i);
1011             sceneView->getRenderStage()->setFrameBufferObject(0);
1012             sceneView->getRenderStage()->setCameraRequiresSetUp(true);
1013             if (sceneView->getRenderStageLeft()) {
1014                 sceneView->getRenderStageLeft()->setFrameBufferObject(0);
1015                 sceneView->getRenderStageLeft()->setCameraRequiresSetUp(true);
1016             }
1017             if (sceneView->getRenderStageRight()) {
1018                 sceneView->getRenderStageRight()->setFrameBufferObject(0);
1019                 sceneView->getRenderStageRight()->setCameraRequiresSetUp(true);
1020             }
1021         }
1022
1023         int cascadeSize = mapSize / 2;
1024         Group* grp = camera->getChild(0)->asGroup();
1025         for (int i = 0; i < 4; ++i ) {
1026             Camera* cascadeCam = static_cast<Camera*>( grp->getChild(i) );
1027             cascadeCam->setViewport( int( i / 2 ) * cascadeSize, (i & 1) * cascadeSize, cascadeSize, cascadeSize );
1028         }
1029
1030         _shadowMapSize = mapSize;
1031     }
1032 }
1033
1034 void FGRenderer::enableShadows(bool enabled)
1035 {
1036     for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
1037             ii != CameraGroup::getDefault()->camerasEnd();
1038             ++ii )
1039     {
1040         CameraInfo* info = ii->get();
1041         Camera* camera = info->getCamera(SHADOW_CAMERA);
1042         if (camera == 0) continue;
1043
1044         osg::Switch* shadowSwitch = camera->getChild(0)->asSwitch();
1045         if (enabled)
1046             shadowSwitch->setAllChildrenOn();
1047         else
1048             shadowSwitch->setAllChildrenOff();
1049     }
1050 }
1051
1052 void FGRenderer::updateCascadeFar(int index, float far_m)
1053 {
1054     if (index < 0 || index > 3)
1055         return;
1056     _cascadeFar[index] = far_m;
1057     _shadowDistances->set( osg::Vec4f(_cascadeFar[0], _cascadeFar[1], _cascadeFar[2], _cascadeFar[3]) );
1058 }
1059
1060 void FGRenderer::updateCascadeNumber(size_t num)
1061 {
1062     if (num < 1 || num > 4)
1063         return;
1064     _numCascades = num;
1065     _shadowNumber->set( (int)_numCascades );
1066 }
1067
1068 class DebugPassListener : public SGPropertyChangeListener {
1069 public:
1070     DebugPassListener(osg::Switch* sw, int i) : _switch(sw), _index(i) {}
1071     virtual void valueChanged(SGPropertyNode* node) {
1072         _switch->setValue(_index, node->getBoolValue());
1073     }
1074
1075 private:
1076     osg::ref_ptr<osg::Switch> _switch;
1077     int _index;
1078 };
1079
1080 osg::Camera*
1081 FGRenderer::buildDeferredLightingCamera( flightgear::CameraInfo* info, osg::GraphicsContext* gc, const FGRenderingPipeline::Stage* stage )
1082 {
1083     osg::Camera* camera = new osg::Camera;
1084     info->addCamera(stage->name, camera );
1085
1086     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( stage->name, info ) );
1087     camera->setAllowEventFocus(false);
1088     camera->setGraphicsContext(gc);
1089     camera->setViewport(new Viewport);
1090     camera->setName(stage->name+"C");
1091     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1092     camera->setRenderOrder(osg::Camera::NESTED_RENDER, stage->orderNum);
1093     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1094     camera->setViewport( new osg::Viewport );
1095     buildAttachments(info, camera, stage->name, stage->attachments);
1096     camera->setDrawBuffer(GL_FRONT);
1097     camera->setReadBuffer(GL_FRONT);
1098     camera->setClearColor( osg::Vec4( 0.5, 0.5, 0.5, 1. ) );
1099     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1100     osg::StateSet* ss = camera->getOrCreateStateSet();
1101     ss->setAttribute( new osg::Depth(osg::Depth::LESS, 0.0, 1.0, false) );
1102     ss->addUniform( _depthInColor );
1103
1104     osg::Switch* lightingGroup = new osg::Switch;
1105
1106     BOOST_FOREACH( osg::ref_ptr<FGRenderingPipeline::Pass> pass, stage->passes ) {
1107         ref_ptr<Node> node = buildPass(info, pass);
1108         if (node.valid()) {
1109             lightingGroup->addChild(node);
1110             if (!pass->debugProperty.empty()) {
1111                 lightingGroup->setValue(lightingGroup->getNumChildren()-1, fgGetBool(pass->debugProperty));
1112                 fgAddChangeListener(new DebugPassListener(lightingGroup, lightingGroup->getNumChildren()-1), pass->debugProperty);
1113             }
1114         }
1115     }
1116
1117     camera->addChild( lightingGroup );
1118
1119     return camera;
1120 }
1121
1122 CameraInfo*
1123 FGRenderer::buildDeferredPipeline(CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
1124                                     const osg::Matrix& view,
1125                                     const osg::Matrix& projection,
1126                                     osg::GraphicsContext* gc)
1127 {
1128     return buildCameraFromRenderingPipeline(_pipeline, cgroup, flags, camera, view, projection, gc);
1129 }
1130
1131 osg::Camera*
1132 FGRenderer::buildDeferredFullscreenCamera( flightgear::CameraInfo* info, const FGRenderingPipeline::Pass* pass )
1133 {
1134     osg::Camera* camera = new osg::Camera;
1135
1136     camera->setClearMask( 0 );
1137     camera->setAllowEventFocus(false);
1138     camera->setName(pass->name+"C");
1139     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1140     camera->setRenderOrder(osg::Camera::NESTED_RENDER, pass->orderNum);
1141     camera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1142     camera->setViewMatrix(osg::Matrix::identity());
1143     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1144
1145     osg::StateSet* ss = camera->getOrCreateStateSet();
1146     ss->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1147     ss->addUniform( info->projInverse );
1148     ss->addUniform( info->viewInverse );
1149     ss->addUniform( info->view );
1150     ss->addUniform( info->bufferSize );
1151     ss->addUniform( info->worldPosCart );
1152     ss->addUniform( info->worldPosGeod );
1153     ss->addUniform( info->shadowMatrix[0] );
1154     ss->addUniform( info->shadowMatrix[1] );
1155     ss->addUniform( info->shadowMatrix[2] );
1156     ss->addUniform( info->shadowMatrix[3] );
1157     ss->addUniform( _ambientFactor );
1158     ss->addUniform( _sunDiffuse );
1159     ss->addUniform( _sunSpecular );
1160     ss->addUniform( _sunDirection );
1161     ss->addUniform( _planes );
1162     ss->addUniform( _shadowNumber );
1163     ss->addUniform( _shadowDistances );
1164     ss->addUniform( _fogColor );
1165     ss->addUniform( _fogDensity );
1166
1167     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1168     g->setUseDisplayList(false);
1169     simgear::EffectGeode* eg = new simgear::EffectGeode;
1170     osg::ref_ptr<SGReaderWriterOptions> opt;
1171     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1172     opt->setPropertyNode(globals->get_props());
1173     simgear::Effect* effect = simgear::makeEffect(pass->effect, true, opt.get());
1174     if (effect) {
1175         eg->setEffect( effect );
1176     }
1177
1178     eg->setName(pass->name+"Quad");
1179     eg->setCullingActive(false);
1180     eg->addDrawable(g);
1181     camera->addChild(eg);
1182
1183     return camera;
1184 }
1185
1186 osg::Camera*
1187 FGRenderer::buildDeferredFullscreenCamera( flightgear::CameraInfo* info, osg::GraphicsContext* gc, const FGRenderingPipeline::Stage* stage )
1188 {
1189     osg::Camera* camera = buildDeferredFullscreenCamera(info, static_cast<const FGRenderingPipeline::Pass*>(stage));
1190     info->addCamera(stage->name, camera, stage->scaleFactor, true);
1191
1192     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback(stage->name, info, stage->needsDuDv) );
1193     camera->setGraphicsContext(gc);
1194     camera->setViewport(new Viewport);
1195     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1196     buildAttachments(info, camera, stage->name, stage->attachments);
1197     camera->setDrawBuffer(GL_FRONT);
1198     camera->setReadBuffer(GL_FRONT);
1199     camera->setClearColor( osg::Vec4( 1., 1., 1., 1. ) );
1200     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1201     camera->setViewMatrix(osg::Matrix::identity());
1202     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1203
1204     osg::StateSet* ss = camera->getOrCreateStateSet();
1205     if (stage->needsDuDv) {
1206         ss->addUniform( info->du );
1207         ss->addUniform( info->dv );
1208     }
1209
1210     return camera;
1211 }
1212
1213 void
1214 FGRenderer::buildDeferredDisplayCamera( osg::Camera* camera, flightgear::CameraInfo* info, const FGRenderingPipeline::Stage* stage, osg::GraphicsContext* gc )
1215 {
1216     camera->setName( "DisplayC" );
1217     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( stage->name, info ) );
1218     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
1219     camera->setAllowEventFocus(false);
1220     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1221     g->setUseDisplayList(false); //DEBUG
1222     simgear::EffectGeode* eg = new simgear::EffectGeode;
1223     osg::ref_ptr<SGReaderWriterOptions> opt;
1224     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1225     opt->setPropertyNode(globals->get_props());
1226     simgear::Effect* effect = simgear::makeEffect(stage->effect, true, opt.get());
1227     if (!effect) {
1228         SG_LOG(SG_VIEW, SG_ALERT, stage->effect + " not found");
1229         return;
1230     }
1231     eg->setEffect(effect);
1232     eg->setCullingActive(false);
1233     eg->addDrawable(g);
1234     camera->setViewMatrix(osg::Matrix::identity());
1235     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1236     camera->addChild(eg);
1237
1238     osg::StateSet* ss = camera->getOrCreateStateSet();
1239     ss->addUniform( _depthInColor );
1240     ss->addUniform( info->projInverse );
1241     ss->addUniform( info->viewInverse );
1242     ss->addUniform( info->view );
1243     ss->addUniform( info->bufferSize );
1244     ss->addUniform( info->worldPosCart );
1245     ss->addUniform( info->worldPosGeod );
1246     ss->addUniform( info->shadowMatrix[0] );
1247     ss->addUniform( info->shadowMatrix[1] );
1248     ss->addUniform( info->shadowMatrix[2] );
1249     ss->addUniform( info->shadowMatrix[3] );
1250     ss->addUniform( _ambientFactor );
1251     ss->addUniform( _sunDiffuse );
1252     ss->addUniform( _sunSpecular );
1253     ss->addUniform( _sunDirection );
1254     ss->addUniform( _planes );
1255     ss->addUniform( _shadowNumber );
1256     ss->addUniform( _shadowDistances );
1257     ss->addUniform( _fogColor );
1258     ss->addUniform( _fogDensity );
1259 }
1260
1261 void
1262 FGRenderer::buildStage(CameraInfo* info,
1263                         FGRenderingPipeline::Stage* stage,
1264                         CameraGroup* cgroup,
1265                         osg::Camera* mainCamera,
1266                         const osg::Matrix& view, const osg::Matrix& projection, osg::GraphicsContext* gc)
1267 {
1268     if (!stage->valid())
1269         return;
1270
1271     ref_ptr<Camera> camera;
1272     bool needOffsets = false;
1273     if (stage->type == "geometry") {
1274         camera = buildDeferredGeometryCamera(info, gc, stage->name, stage->attachments);
1275         needOffsets = true;
1276     } else if (stage->type == "lighting") {
1277         camera = buildDeferredLightingCamera(info, gc, stage);
1278         needOffsets = true;
1279     } else if (stage->type == "shadow")
1280         camera = buildDeferredShadowCamera(info, gc, stage->name, stage->attachments);
1281     else if (stage->type == "fullscreen")
1282         camera = buildDeferredFullscreenCamera(info, gc, stage);
1283     else if (stage->type == "display") {
1284         camera = mainCamera;
1285         buildDeferredDisplayCamera(camera, info, stage, gc);
1286     } else
1287         throw sg_exception("Stage type is not supported");
1288
1289     if (needOffsets)
1290         cgroup->getViewer()->addSlave(camera, projection, view, false);
1291     else
1292         cgroup->getViewer()->addSlave(camera, false);
1293     installCullVisitor(camera);
1294     int slaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
1295     if (stage->type == "display")
1296         info->addCamera( stage->type, camera, slaveIndex, true );
1297     info->getRenderStageInfo(stage->name).slaveIndex = slaveIndex;
1298 }
1299
1300 osg::Node*
1301 FGRenderer::buildLightingSkyCloudsPass(FGRenderingPipeline::Pass* pass)
1302 {
1303     Group* group = new Group;
1304     group->setName("skyCloudsGroup");
1305     group->setNodeMask(simgear::BACKGROUND_BIT);
1306
1307     StateSet* ss = group->getOrCreateStateSet();
1308     ss->setAttributeAndModes( new osg::ColorMask( true, true, true, false ), osg::StateAttribute::ON );
1309     group->addChild( _sky->getPreRoot() );
1310     group->addChild( _sky->getCloudRoot() );
1311     return group;
1312 }
1313
1314 osg::Node*
1315 FGRenderer::buildLightingLightsPass(CameraInfo* info, FGRenderingPipeline::Pass* pass)
1316 {
1317     osg::Camera* lightCam = new osg::Camera;
1318     StateSet* ss = lightCam->getOrCreateStateSet();
1319     ss->addUniform( _planes );
1320     ss->addUniform( info->bufferSize );
1321     ss->addUniform( _fogColor );
1322     ss->addUniform( _fogDensity );
1323     lightCam->setName( "LightCamera" );
1324     lightCam->setClearMask(0);
1325     lightCam->setAllowEventFocus(false);
1326     lightCam->setReferenceFrame(osg::Transform::RELATIVE_RF);
1327     lightCam->setRenderOrder(osg::Camera::NESTED_RENDER,pass->orderNum);
1328     lightCam->setViewMatrix(osg::Matrix::identity());
1329     lightCam->setProjectionMatrix(osg::Matrix::identity());
1330     lightCam->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1331     lightCam->setCullMask( simgear::MODELLIGHT_BIT | simgear::PANEL2D_BIT | simgear::PERMANENTLIGHT_BIT);
1332     lightCam->setInheritanceMask( osg::CullSettings::ALL_VARIABLES & ~osg::CullSettings::CULL_MASK );
1333     lightCam->addChild( mDeferredRealRoot.get() );
1334
1335     return lightCam;
1336 }
1337
1338 osg::Node*
1339 FGRenderer::buildPass(CameraInfo* info, FGRenderingPipeline::Pass* pass)
1340 {
1341     if (!pass->valid())
1342         return 0;
1343
1344     ref_ptr<Node> node;
1345     if (pass->type == "sky-clouds")
1346         node = buildLightingSkyCloudsPass(pass);
1347     else if (pass->type == "fullscreen")
1348         node = buildDeferredFullscreenCamera(info, pass);
1349     else if (pass->type == "lights")
1350         node = buildLightingLightsPass(info, pass);
1351     else
1352         throw sg_exception("Pass type is not supported");
1353
1354     return node.release();
1355 }
1356
1357 void
1358 FGRenderer::buildBuffers(FGRenderingPipeline* rpipe, CameraInfo* info)
1359 {
1360     for (size_t i = 0; i < rpipe->buffers.size(); ++i) {
1361         osg::ref_ptr<FGRenderingPipeline::Buffer> buffer = rpipe->buffers[i];
1362         if (buffer->valid()) {
1363             bool fullscreen = buffer->width == -1 && buffer->height == -1;
1364             info->addBuffer(buffer->name, buildDeferredBuffer( buffer->internalFormat,
1365                                                                 buffer->sourceFormat,
1366                                                                 buffer->sourceType,
1367                                                                 buffer->wrapMode,
1368                                                                 buffer->shadowComparison),
1369                             fullscreen ? buffer->scaleFactor : 0.0f);
1370             if (!fullscreen) {
1371                 info->getBuffer(buffer->name)->setTextureSize(buffer->width, buffer->height);
1372             }
1373         }
1374     }
1375 }
1376
1377 CameraInfo* FGRenderer::buildCameraFromRenderingPipeline(FGRenderingPipeline* rpipe, CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
1378                                     const osg::Matrix& view, const osg::Matrix& projection, osg::GraphicsContext* gc)
1379 {
1380     CameraInfo* info = new CameraInfo(flags);
1381     buildBuffers(rpipe, info);
1382
1383     for (size_t i = 0; i < rpipe->stages.size(); ++i) {
1384         osg::ref_ptr<FGRenderingPipeline::Stage> stage = rpipe->stages[i];
1385         buildStage(info, stage, cgroup, camera, view, projection, gc);
1386     }
1387
1388     cgroup->addCamera(info);
1389
1390     return info;
1391 }
1392
1393 void
1394 FGRenderer::setupView( void )
1395 {
1396     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1397     osg::initNotifyLevel();
1398
1399     // The number of polygon-offset "units" to place between layers.  In
1400     // principle, one is supposed to be enough.  In practice, I find that
1401     // my hardware/driver requires many more.
1402     osg::PolygonOffset::setUnitsMultiplier(1);
1403     osg::PolygonOffset::setFactorMultiplier(1);
1404
1405 // build the sky
1406     // The sun and moon diameters are scaled down numbers of the
1407     // actual diameters. This was needed to fit both the sun and the
1408     // moon within the distance to the far clip plane.
1409     // Moon diameter:    3,476 kilometers
1410     // Sun diameter: 1,390,000 kilometers
1411     osg::ref_ptr<SGReaderWriterOptions> opt;
1412     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1413     opt->setPropertyNode(globals->get_props());
1414     _sky->build( 80000.0, 80000.0,
1415                   463.3, 361.8,
1416                   *globals->get_ephem(),
1417                   fgGetNode("/environment", true),
1418                   opt.get());
1419
1420     viewer->getCamera()
1421         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1422
1423     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
1424
1425     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
1426
1427     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
1428     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1429
1430     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
1431     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
1432     stateSet->setAttribute(new osg::BlendFunc);
1433     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
1434
1435     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
1436
1437     // this will be set below
1438     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
1439
1440     osg::Material* material = new osg::Material;
1441     stateSet->setAttribute(material);
1442
1443     stateSet->setTextureAttribute(0, new osg::TexEnv);
1444     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
1445
1446     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
1447     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
1448     stateSet->setAttribute(hint);
1449     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
1450     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
1451     stateSet->setAttribute(hint);
1452     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
1453     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
1454     stateSet->setAttribute(hint);
1455     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
1456     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
1457     stateSet->setAttribute(hint);
1458     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
1459     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
1460     stateSet->setAttribute(hint);
1461
1462     osg::Group* sceneGroup = new osg::Group;
1463     sceneGroup->setName("rendererScene");
1464     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
1465     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
1466
1467     //sceneGroup->addChild(thesky->getCloudRoot());
1468
1469     stateSet = sceneGroup->getOrCreateStateSet();
1470     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
1471
1472     // need to update the light on every frame
1473     // OSG LightSource objects are rather confusing. OSG only supports
1474     // the 10 lights specified by OpenGL itself; if more than one
1475     // LightSource in the scene graph have the same light number, it's
1476     // indeterminate which values will be used to render geometry that
1477     // has that light number enabled. Also, adding children to a
1478     // LightSource is just a shortcut for setting up a state set that
1479     // has the corresponding OpenGL light enabled: a LightSource will
1480     // affect geometry anywhere in the scene graph that has its light
1481     // number enabled in a state set.
1482     LightSource* lightSource = new LightSource;
1483     lightSource->setName("FGLightSource");
1484     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
1485     // relative because of CameraView being just a clever transform node
1486     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
1487     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
1488     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
1489     mRealRoot->addChild(lightSource);
1490     // we need a white diffuse light for the phase of the moon
1491     osg::LightSource* sunLight = new osg::LightSource;
1492     sunLight->setName("sunLightSource");
1493     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
1494     sunLight->getLight()->setLightNum(1);
1495     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
1496     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
1497     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
1498
1499     // Hang a StateSet above the sky subgraph in order to turn off
1500     // light 0
1501     Group* skyGroup = new Group;
1502     skyGroup->setName("rendererSkyParent");
1503     StateSet* skySS = skyGroup->getOrCreateStateSet();
1504     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
1505     skyGroup->addChild(_sky->getPreRoot());
1506     sunLight->addChild(skyGroup);
1507     mRoot->addChild(sceneGroup);
1508     if ( _classicalRenderer )
1509         mRoot->addChild(sunLight);
1510
1511     // Clouds are added to the scene graph later
1512     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
1513     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
1514     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
1515     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
1516
1517     // enable disable specular highlights.
1518     // is the place where we might plug in an other fragment shader ...
1519     osg::LightModel* lightModel = new osg::LightModel;
1520     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
1521     stateSet->setAttribute(lightModel);
1522
1523     // switch to enable wireframe
1524     osg::PolygonMode* polygonMode = new osg::PolygonMode;
1525     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
1526     stateSet->setAttributeAndModes(polygonMode);
1527
1528     // scene fog handling
1529     osg::Fog* fog = new osg::Fog;
1530     fog->setUpdateCallback(new FGFogUpdateCallback);
1531     stateSet->setAttributeAndModes(fog);
1532     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
1533
1534     // plug in the GUI
1535     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
1536     if (guiCamera) {
1537
1538         osg::Geode* geode = new osg::Geode;
1539         geode->addDrawable(new SGPuDrawable);
1540         geode->addDrawable(new SGHUDDrawable);
1541         guiCamera->addChild(geode);
1542
1543
1544       guiCamera->addChild(FGPanelNode::create2DPanelNode());
1545     }
1546
1547     osg::Switch* sw = new osg::Switch;
1548     sw->setName("scenerySwitch");
1549     sw->setUpdateCallback(new FGScenerySwitchCallback);
1550     sw->addChild(mRoot.get());
1551     mRealRoot->addChild(sw);
1552     // The clouds are attached directly to the scene graph root
1553     // because, in theory, they don't want the same default state set
1554     // as the rest of the scene. This may not be true in practice.
1555         if ( _classicalRenderer ) {
1556                 mRealRoot->addChild(_sky->getCloudRoot());
1557                 mRealRoot->addChild(FGCreateRedoutNode());
1558         }
1559     // Attach empty program to the scene root so that shader programs
1560     // don't leak into state sets (effects) that shouldn't have one.
1561     stateSet = mRealRoot->getOrCreateStateSet();
1562     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
1563
1564     mDeferredRealRoot->addChild( mRealRoot.get() );
1565
1566     DeletionManager::install(mRealRoot.get());
1567 }
1568
1569 // Update all Visuals (redraws anything graphics related)
1570 void
1571 FGRenderer::update( ) {
1572     if (!_position_finalized || !_scenery_loaded->getBoolValue())
1573     {
1574         _splash_alpha->setDoubleValue(1.0);
1575         return;
1576     }
1577     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1578
1579     if (_splash_alpha->getDoubleValue()>0.0)
1580     {
1581         // Fade out the splash screen
1582         const double fade_time = 0.5;
1583         const double fade_steps_per_sec = 10;
1584         double delay_time = SGMiscd::min(fade_time/fade_steps_per_sec,
1585                                          (SGTimeStamp::now() - _splash_time).toSecs());
1586         _splash_time = SGTimeStamp::now();
1587         double sAlpha = _splash_alpha->getDoubleValue();
1588         sAlpha -= SGMiscd::max(0.0,delay_time/fade_time);
1589         FGScenerySwitchCallback::scenery_enabled = (sAlpha<1.0);
1590         _splash_alpha->setDoubleValue((sAlpha < 0) ? 0.0 : sAlpha);
1591     }
1592
1593     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
1594         if (!_classicalRenderer ) {
1595                 _ambientFactor->set( toOsg(l->scene_ambient()) );
1596                 _sunDiffuse->set( toOsg(l->scene_diffuse()) );
1597                 _sunSpecular->set( toOsg(l->scene_specular()) );
1598                 _sunDirection->set( osg::Vec3f(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]) );
1599         }
1600
1601     // update fog params
1602     double actual_visibility;
1603     if (_cloud_status->getBoolValue()) {
1604         actual_visibility = _sky->get_visibility();
1605     } else {
1606         actual_visibility = _visibility_m->getDoubleValue();
1607     }
1608
1609     // idle_state is now 1000 meaning we've finished all our
1610     // initializations and are running the main loop, so this will
1611     // now work without seg faulting the system.
1612
1613     FGViewer *current__view = globals->get_current_view();
1614     // Force update of center dependent values ...
1615     current__view->set_dirty();
1616
1617     osg::Camera *camera = viewer->getCamera();
1618
1619     bool skyblend = _skyblend->getBoolValue();
1620     if ( skyblend ) {
1621
1622         if ( _textures->getBoolValue() ) {
1623             SGVec4f clearColor(l->adj_fog_color());
1624             camera->setClearColor(toOsg(clearColor));
1625         }
1626     } else {
1627         SGVec4f clearColor(l->sky_color());
1628         camera->setClearColor(toOsg(clearColor));
1629     }
1630
1631     // update fog params if visibility has changed
1632     double visibility_meters = _visibility_m->getDoubleValue();
1633     _sky->set_visibility(visibility_meters);
1634
1635     double altitude_m = _altitude_ft->getDoubleValue() * SG_FEET_TO_METER;
1636     _sky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
1637
1638     // update the sky dome
1639     if ( skyblend ) {
1640
1641         // The sun and moon distances are scaled down versions
1642         // of the actual distance to get both the moon and the sun
1643         // within the range of the far clip plane.
1644         // Moon distance:    384,467 kilometers
1645         // Sun distance: 150,000,000 kilometers
1646
1647         double sun_horiz_eff, moon_horiz_eff;
1648         if (_horizon_effect->getBoolValue()) {
1649             sun_horiz_eff
1650                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
1651                                              0.0),
1652                              0.33) / 3.0;
1653             moon_horiz_eff
1654                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
1655                                              0.0),
1656                              0.33)/3.0;
1657         } else {
1658            sun_horiz_eff = moon_horiz_eff = 1.0;
1659         }
1660
1661         SGSkyState sstate;
1662         sstate.pos       = current__view->getViewPosition();
1663         sstate.pos_geod  = current__view->getPosition();
1664         sstate.ori       = current__view->getViewOrientation();
1665         sstate.spin      = l->get_sun_rotation();
1666         sstate.gst       = globals->get_time_params()->getGst();
1667         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
1668         sstate.moon_dist = 40000.0 * moon_horiz_eff;
1669         sstate.sun_angle = l->get_sun_angle();
1670
1671         SGSkyColor scolor;
1672         scolor.sky_color   = SGVec3f(l->sky_color().data());
1673         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
1674         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
1675         scolor.cloud_color = SGVec3f(l->cloud_color().data());
1676         scolor.sun_angle   = l->get_sun_angle();
1677         scolor.moon_angle  = l->get_moon_angle();
1678
1679         double delta_time_sec = _sim_delta_sec->getDoubleValue();
1680         _sky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
1681         _sky->repaint( scolor, *globals->get_ephem() );
1682
1683             //OSGFIXME
1684 //         shadows->setupShadows(
1685 //           current__view->getLongitude_deg(),
1686 //           current__view->getLatitude_deg(),
1687 //           globals->get_time_params()->getGst(),
1688 //           globals->get_ephem()->getSunRightAscension(),
1689 //           globals->get_ephem()->getSunDeclination(),
1690 //           l->get_sun_angle());
1691
1692     }
1693
1694 //     sgEnviro.setLight(l->adj_fog_color());
1695 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
1696 //         current__view->get_world_up(),
1697 //         current__view->getLongitude_deg(),
1698 //         current__view->getLatitude_deg(),
1699 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
1700 //         delta_time_sec);
1701
1702     // OSGFIXME
1703 //     sgEnviro.drawLightning();
1704
1705 //        double current_view_origin_airspeed_horiz_kt =
1706 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
1707 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
1708 //                                * SGD_DEGREES_TO_RADIANS);
1709
1710     // OSGFIXME
1711 //     if( is_internal )
1712 //         shadows->endOfFrame();
1713
1714     // need to call the update visitor once
1715     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
1716     mUpdateVisitor->setViewData(current__view->getViewPosition(),
1717                                 current__view->getViewOrientation());
1718     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
1719     mUpdateVisitor->setLight(direction, l->scene_ambient(),
1720                              l->scene_diffuse(), l->scene_specular(),
1721                              l->adj_fog_color(),
1722                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
1723     mUpdateVisitor->setVisibility(actual_visibility);
1724     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
1725     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
1726     cullMask |= simgear::GroundLightManager::instance()
1727         ->getLightNodeMask(mUpdateVisitor.get());
1728     if (_panel_hotspots->getBoolValue())
1729         cullMask |= simgear::PICK_BIT;
1730     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
1731         if ( !_classicalRenderer ) {
1732                 _fogColor->set( toOsg( l->adj_fog_color() ) );
1733                 _fogDensity->set( float( mUpdateVisitor->getFogExp2Density() ) );
1734         }
1735 }
1736
1737 void
1738 FGRenderer::resize( int width, int height )
1739 {
1740     int curWidth = _xsize->getIntValue(),
1741         curHeight = _ysize->getIntValue();
1742     SG_LOG(SG_VIEW, SG_DEBUG, "FGRenderer::resize: new size " << width << " x " << height);
1743     if ((curHeight != height) || (curWidth != width)) {
1744     // must guard setting these, or PLIB-PUI fails with too many live interfaces
1745         _xsize->setIntValue(width);
1746         _ysize->setIntValue(height);
1747     }
1748 }
1749
1750 typedef osgUtil::LineSegmentIntersector::Intersection Intersection;
1751 SGVec2d uvFromIntersection(const Intersection& hit)
1752 {
1753   // Taken from http://trac.openscenegraph.org/projects/osg/browser/OpenSceneGraph/trunk/examples/osgmovie/osgmovie.cpp
1754
1755   osg::Drawable* drawable = hit.drawable.get();
1756   osg::Geometry* geometry = drawable ? drawable->asGeometry() : 0;
1757   osg::Vec3Array* vertices =
1758     geometry ? dynamic_cast<osg::Vec3Array*>(geometry->getVertexArray()) : 0;
1759
1760   if( !vertices )
1761   {
1762     SG_LOG(SG_INPUT, SG_WARN, "Unable to get vertices for intersection.");
1763     return SGVec2d(-9999,-9999);
1764   }
1765
1766   // get the vertex indices.
1767   const Intersection::IndexList& indices = hit.indexList;
1768   const Intersection::RatioList& ratios = hit.ratioList;
1769
1770   if( indices.size() != 3 || ratios.size() != 3 )
1771   {
1772     SG_LOG( SG_INPUT,
1773             SG_WARN,
1774             "Intersection has insufficient indices to work with." );
1775     return SGVec2d(-9999,-9999);
1776   }
1777
1778   unsigned int i1 = indices[0];
1779   unsigned int i2 = indices[1];
1780   unsigned int i3 = indices[2];
1781
1782   float r1 = ratios[0];
1783   float r2 = ratios[1];
1784   float r3 = ratios[2];
1785
1786   osg::Array* texcoords =
1787     (geometry->getNumTexCoordArrays() > 0) ? geometry->getTexCoordArray(0) : 0;
1788   osg::Vec2Array* texcoords_Vec2Array =
1789     dynamic_cast<osg::Vec2Array*>(texcoords);
1790
1791   if( !texcoords_Vec2Array )
1792   {
1793     SG_LOG(SG_INPUT, SG_WARN, "Unable to get texcoords for intersection.");
1794     return SGVec2d(-9999,-9999);
1795   }
1796
1797   // we have tex coord array so now we can compute the final tex coord at the
1798   // point of intersection.
1799   osg::Vec2 tc1 = (*texcoords_Vec2Array)[i1];
1800   osg::Vec2 tc2 = (*texcoords_Vec2Array)[i2];
1801   osg::Vec2 tc3 = (*texcoords_Vec2Array)[i3];
1802
1803   return toSG( osg::Vec2d(tc1 * r1 + tc2 * r2 + tc3 * r3) );
1804 }
1805
1806 bool
1807 FGRenderer::pick(std::vector<SGSceneryPick>& pickList, const osg::Vec2& windowPos)
1808 {
1809     // wipe out the return ...
1810     pickList.clear();
1811     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
1812     Intersections intersections;
1813
1814     if (!computeIntersections(CameraGroup::getDefault(), windowPos, intersections))
1815         return false;
1816     for (Intersections::iterator hit = intersections.begin(),
1817              e = intersections.end();
1818          hit != e;
1819          ++hit) {
1820         const osg::NodePath& np = hit->nodePath;
1821         osg::NodePath::const_reverse_iterator npi;
1822
1823         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1824             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1825             if (!ud || (ud->getNumPickCallbacks() == 0))
1826                 continue;
1827
1828             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1829                 SGPickCallback* pickCallback = ud->getPickCallback(i);
1830                 if (!pickCallback)
1831                     continue;
1832                 SGSceneryPick sceneryPick;
1833                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
1834                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
1835
1836                 if( pickCallback->needsUV() )
1837                   sceneryPick.info.uv = uvFromIntersection(*hit);
1838
1839                 sceneryPick.callback = pickCallback;
1840                 pickList.push_back(sceneryPick);
1841             } // of installed pick callbacks iteration
1842         } // of reverse node path walk
1843     }
1844
1845     return !pickList.empty();
1846 }
1847
1848 void
1849 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
1850 {
1851     viewer = viewer_;
1852 }
1853
1854 void
1855 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
1856 {
1857     eventHandler = eventHandler_;
1858 }
1859
1860 void
1861 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
1862 {
1863     mRealRoot->addChild(camera);
1864 }
1865
1866 void
1867 FGRenderer::removeCamera(osg::Camera* camera)
1868 {
1869     mRealRoot->removeChild(camera);
1870 }
1871
1872 void
1873 FGRenderer::setPlanes( double zNear, double zFar )
1874 {
1875         _planes->set( osg::Vec3f( - zFar, - zFar * zNear, zFar - zNear ) );
1876 }
1877
1878 bool
1879 fgDumpSceneGraphToFile(const char* filename)
1880 {
1881     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
1882 }
1883
1884 bool
1885 fgDumpTerrainBranchToFile(const char* filename)
1886 {
1887     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
1888                                  filename );
1889 }
1890
1891 // For debugging
1892 bool
1893 fgDumpNodeToFile(osg::Node* node, const char* filename)
1894 {
1895     return osgDB::writeNodeFile(*node, filename);
1896 }
1897
1898 namespace flightgear
1899 {
1900 using namespace osg;
1901
1902 class VisibleSceneInfoVistor : public NodeVisitor, CullStack
1903 {
1904 public:
1905     VisibleSceneInfoVistor()
1906         : NodeVisitor(CULL_VISITOR, TRAVERSE_ACTIVE_CHILDREN)
1907     {
1908         setCullingMode(CullSettings::SMALL_FEATURE_CULLING
1909                        | CullSettings::VIEW_FRUSTUM_CULLING);
1910         setComputeNearFarMode(CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1911     }
1912
1913     VisibleSceneInfoVistor(const VisibleSceneInfoVistor& rhs)
1914     {
1915     }
1916
1917     META_NodeVisitor("flightgear","VisibleSceneInfoVistor")
1918
1919     typedef std::map<const std::string,int> InfoMap;
1920
1921     void getNodeInfo(Node* node)
1922     {
1923         const char* typeName = typeid(*node).name();
1924         classInfo[typeName]++;
1925         const std::string& nodeName = node->getName();
1926         if (!nodeName.empty())
1927             nodeInfo[nodeName]++;
1928     }
1929
1930     void dumpInfo()
1931     {
1932         using namespace std;
1933         typedef vector<InfoMap::iterator> FreqVector;
1934         cout << "class info:\n";
1935         FreqVector classes;
1936         for (InfoMap::iterator itr = classInfo.begin(), end = classInfo.end();
1937              itr != end;
1938              ++itr)
1939             classes.push_back(itr);
1940         sort(classes.begin(), classes.end(), freqComp);
1941         for (FreqVector::iterator itr = classes.begin(), end = classes.end();
1942              itr != end;
1943              ++itr) {
1944             cout << (*itr)->first << " " << (*itr)->second << "\n";
1945         }
1946         cout << "\nnode info:\n";
1947         FreqVector nodes;
1948         for (InfoMap::iterator itr = nodeInfo.begin(), end = nodeInfo.end();
1949              itr != end;
1950              ++itr)
1951             nodes.push_back(itr);
1952
1953         sort (nodes.begin(), nodes.end(), freqComp);
1954         for (FreqVector::iterator itr = nodes.begin(), end = nodes.end();
1955              itr != end;
1956              ++itr) {
1957             cout << (*itr)->first << " " << (*itr)->second << "\n";
1958         }
1959         cout << endl;
1960     }
1961
1962     void doTraversal(Camera* camera, Node* root, Viewport* viewport)
1963     {
1964         ref_ptr<RefMatrix> projection
1965             = createOrReuseMatrix(camera->getProjectionMatrix());
1966         ref_ptr<RefMatrix> mv = createOrReuseMatrix(camera->getViewMatrix());
1967         if (!viewport)
1968             viewport = camera->getViewport();
1969         if (viewport)
1970             pushViewport(viewport);
1971         pushProjectionMatrix(projection.get());
1972         pushModelViewMatrix(mv.get(), Transform::ABSOLUTE_RF);
1973         root->accept(*this);
1974         popModelViewMatrix();
1975         popProjectionMatrix();
1976         if (viewport)
1977             popViewport();
1978         dumpInfo();
1979     }
1980
1981     void apply(Node& node)
1982     {
1983         if (isCulled(node))
1984             return;
1985         pushCurrentMask();
1986         getNodeInfo(&node);
1987         traverse(node);
1988         popCurrentMask();
1989     }
1990     void apply(Group& node)
1991     {
1992         if (isCulled(node))
1993             return;
1994         pushCurrentMask();
1995         getNodeInfo(&node);
1996         traverse(node);
1997         popCurrentMask();
1998     }
1999
2000     void apply(Transform& node)
2001     {
2002         if (isCulled(node))
2003             return;
2004         pushCurrentMask();
2005         ref_ptr<RefMatrix> matrix = createOrReuseMatrix(*getModelViewMatrix());
2006         node.computeLocalToWorldMatrix(*matrix,this);
2007         pushModelViewMatrix(matrix.get(), node.getReferenceFrame());
2008         getNodeInfo(&node);
2009         traverse(node);
2010         popModelViewMatrix();
2011         popCurrentMask();
2012     }
2013
2014     void apply(Camera& camera)
2015     {
2016         // Save current cull settings
2017         CullSettings saved_cull_settings(*this);
2018
2019         // set cull settings from this Camera
2020         setCullSettings(camera);
2021         // inherit the settings from above
2022         inheritCullSettings(saved_cull_settings, camera.getInheritanceMask());
2023
2024         // set the cull mask.
2025         unsigned int savedTraversalMask = getTraversalMask();
2026         bool mustSetCullMask = (camera.getInheritanceMask()
2027                                 & osg::CullSettings::CULL_MASK) == 0;
2028         if (mustSetCullMask)
2029             setTraversalMask(camera.getCullMask());
2030
2031         osg::RefMatrix* projection = 0;
2032         osg::RefMatrix* modelview = 0;
2033
2034         if (camera.getReferenceFrame()==osg::Transform::RELATIVE_RF) {
2035             if (camera.getTransformOrder()==osg::Camera::POST_MULTIPLY) {
2036                 projection = createOrReuseMatrix(*getProjectionMatrix()
2037                                                  *camera.getProjectionMatrix());
2038                 modelview = createOrReuseMatrix(*getModelViewMatrix()
2039                                                 * camera.getViewMatrix());
2040             }
2041             else {              // pre multiply
2042                 projection = createOrReuseMatrix(camera.getProjectionMatrix()
2043                                                  * (*getProjectionMatrix()));
2044                 modelview = createOrReuseMatrix(camera.getViewMatrix()
2045                                                 * (*getModelViewMatrix()));
2046             }
2047         } else {
2048             // an absolute reference frame
2049             projection = createOrReuseMatrix(camera.getProjectionMatrix());
2050             modelview = createOrReuseMatrix(camera.getViewMatrix());
2051         }
2052         if (camera.getViewport())
2053             pushViewport(camera.getViewport());
2054
2055         pushProjectionMatrix(projection);
2056         pushModelViewMatrix(modelview, camera.getReferenceFrame());
2057
2058         traverse(camera);
2059
2060         // restore the previous model view matrix.
2061         popModelViewMatrix();
2062
2063         // restore the previous model view matrix.
2064         popProjectionMatrix();
2065
2066         if (camera.getViewport()) popViewport();
2067
2068         // restore the previous traversal mask settings
2069         if (mustSetCullMask)
2070             setTraversalMask(savedTraversalMask);
2071
2072         // restore the previous cull settings
2073         setCullSettings(saved_cull_settings);
2074     }
2075
2076 protected:
2077     // sort in reverse
2078     static bool freqComp(const InfoMap::iterator& lhs, const InfoMap::iterator& rhs)
2079     {
2080         return lhs->second > rhs->second;
2081     }
2082     InfoMap classInfo;
2083     InfoMap nodeInfo;
2084 };
2085
2086 bool printVisibleSceneInfo(FGRenderer* renderer)
2087 {
2088     osgViewer::Viewer* viewer = renderer->getViewer();
2089     VisibleSceneInfoVistor vsv;
2090     Viewport* vp = 0;
2091     if (!viewer->getCamera()->getViewport() && viewer->getNumSlaves() > 0) {
2092         const View::Slave& slave = viewer->getSlave(0);
2093         vp = slave._camera->getViewport();
2094     }
2095     vsv.doTraversal(viewer->getCamera(), viewer->getSceneData(), vp);
2096     return true;
2097 }
2098
2099 }
2100 // end of renderer.cxx
2101