src/Viewer/renderer.cxx

   1 // renderer.cxx -- top level sim routines
   2 //
   3 // Written by Curtis Olson, started May 1997.
   4 // This file contains parts of main.cxx prior to october 2004
   5 //
   6 // Copyright (C) 1997 - 2002  Curtis L. Olson  - http://www.flightgear.org/~curt
   7 //
   8 // This program is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU General Public License as
  10 // published by the Free Software Foundation; either version 2 of the
  11 // License, or (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful, but
  14 // WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  21
  22 #ifdef HAVE_CONFIG_H
  23 #  include <config.h>
  24 #endif
  25
  26 #ifdef HAVE_WINDOWS_H
  27 #  include <windows.h>
  28 #endif
  29
  30 #include <simgear/compiler.h>
  31
  32 #include <algorithm>
  33 #include <iostream>
  34 #include <map>
  35 #include <vector>
  36 #include <typeinfo>
  37
  38 #include <boost/foreach.hpp>
  39
  40 #include <osg/ref_ptr>
  41 #include <osg/AlphaFunc>
  42 #include <osg/BlendFunc>
  43 #include <osg/Camera>
  44 #include <osg/CullFace>
  45 #include <osg/CullStack>
  46 #include <osg/Depth>
  47 #include <osg/Fog>
  48 #include <osg/Group>
  49 #include <osg/Hint>
  50 #include <osg/Light>
  51 #include <osg/LightModel>
  52 #include <osg/LightSource>
  53 #include <osg/Material>
  54 #include <osg/Math>
  55 #include <osg/NodeCallback>
  56 #include <osg/Notify>
  57 #include <osg/PolygonMode>
  58 #include <osg/PolygonOffset>
  59 #include <osg/Program>
  60 #include <osg/Version>
  61 #include <osg/TexEnv>
  62
  63 #include <osgUtil/LineSegmentIntersector>
  64
  65 #include <osg/io_utils>
  66 #include <osgDB/WriteFile>
  67 #include <osgViewer/Renderer>
  68
  69 #include <simgear/scene/material/matlib.hxx>
  70 #include <simgear/scene/material/EffectCullVisitor.hxx>
  71 #include <simgear/scene/material/Effect.hxx>
  72 #include <simgear/scene/material/EffectGeode.hxx>
  73 #include <simgear/scene/material/EffectBuilder.hxx>
  74 #include <simgear/scene/model/animation.hxx>
  75 #include <simgear/scene/model/placement.hxx>
  76 #include <simgear/scene/sky/sky.hxx>
  77 #include <simgear/scene/util/DeletionManager.hxx>
  78 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  79 #include <simgear/scene/util/RenderConstants.hxx>
  80 #include <simgear/scene/util/SGSceneUserData.hxx>
  81 #include <simgear/scene/tgdb/GroundLightManager.hxx>
  82 #include <simgear/scene/tgdb/pt_lights.hxx>
  83 #include <simgear/scene/tgdb/userdata.hxx>
  84 #include <simgear/structure/OSGUtils.hxx>
  85 #include <simgear/props/props.hxx>
  86 #include <simgear/timing/sg_time.hxx>
  87 #include <simgear/ephemeris/ephemeris.hxx>
  88 #include <simgear/math/sg_random.h>
  89
  90 #include <Time/light.hxx>
  91 #include <Time/light.hxx>
  92 #include <Cockpit/panel.hxx>
  93
  94 #include <Model/panelnode.hxx>
  95 #include <Model/modelmgr.hxx>
  96 #include <Model/acmodel.hxx>
  97 #include <Scenery/scenery.hxx>
  98 #include <Scenery/redout.hxx>
  99 #include <GUI/new_gui.hxx>
 100 #include <GUI/gui.h>
 101
 102 #include <Instrumentation/HUD/HUD.hxx>
 103 #include <Environment/precipitation_mgr.hxx>
 104 #include <Environment/environment_mgr.hxx>
 105 #include <Environment/ephemeris.hxx>
 106
 107 //#include <Main/main.hxx>
 108 #include "view.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 FGRenderer::FGRenderer() :
 390     _sky(NULL),
 391     _ambientFactor( new osg::Uniform( "fg_SunAmbientColor", osg::Vec4f() ) ),
 392     _sunDiffuse( new osg::Uniform( "fg_SunDiffuseColor", osg::Vec4f() ) ),
 393     _sunSpecular( new osg::Uniform( "fg_SunSpecularColor", osg::Vec4f() ) ),
 394     _sunDirection( new osg::Uniform( "fg_SunDirection", osg::Vec3f() ) ),
 395     _planes( new osg::Uniform( "fg_Planes", osg::Vec3f() ) ),
 396     _fogColor( new osg::Uniform( "fg_FogColor", osg::Vec4f(1.0, 1.0, 1.0, 1.0) ) ),
 397     _fogDensity( new osg::Uniform( "fg_FogDensity", 0.0001f ) ),
 398     _shadowNumber( new osg::Uniform( "fg_ShadowNumber", (int)4 ) ),
 399     _shadowDistances( new osg::Uniform( "fg_ShadowDistances", osg::Vec4f(5.0, 50.0, 500.0, 5000.0 ) ) ),
 400     _depthInColor( new osg::Uniform( "fg_DepthInColor", false ) )
 401 {
 402     // it's not the real root, whatever that means
 403     _root = new osg::Group;
 404     _root->setName("fakeRoot");
 405
 406     _updateVisitor = new SGUpdateVisitor;
 407
 408   // when Rembrandt is enabled, we use this group to access the whole
 409   // scene. Since the only child is the _viewerSceneRoot, we could
 410   // simply copy the reference, we don't need the additional group.
 411     _deferredRealRoot = new osg::Group;
 412
 413    _numCascades = 4;
 414    _cascadeFar[0] = 5.f;
 415    _cascadeFar[1] = 50.f;
 416    _cascadeFar[2] = 500.f;
 417    _cascadeFar[3] = 5000.f;
 418 }
 419
 420 FGRenderer::~FGRenderer()
 421 {
 422     SGPropertyChangeListenerVec::iterator i = _listeners.begin();
 423     for (; i != _listeners.end(); ++i) {
 424         delete *i;
 425     }
 426
 427     // replace the viewer's scene completely
 428     if (getViewer()) {
 429         getViewer()->setSceneData(new osg::Group);
 430     }
 431
 432     delete _sky;
 433 }
 434
 435 // Initialize various GL/view parameters
 436 // XXX This should be called "preinit" or something, as it initializes
 437 // critical parts of the scene graph in addition to the splash screen.
 438 void
 439 FGRenderer::splashinit( void )
 440 {
 441     // important that we reset the viewer sceneData here, to ensure the reference
 442     // time for everything is in sync; otherwise on reset the Viewer and
 443     // GraphicsWindow clocks are out of sync.
 444     osgViewer::Viewer* viewer = getViewer();
 445     viewer->setName("osgViewer");
 446     _viewerSceneRoot = new osg::Group;
 447     _viewerSceneRoot->setName("viewerSceneRoot");
 448     viewer->setSceneData(_viewerSceneRoot);
 449
 450     ref_ptr<Node> splashNode = fgCreateSplashNode();
 451     if (_classicalRenderer) {
 452         _viewerSceneRoot->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
 466     _frameStamp = new osg::FrameStamp;
 467     viewer->setFrameStamp(_frameStamp.get());
 468     // Scene doesn't seem to pass the frame stamp to the update
 469     // visitor automatically.
 470     _updateVisitor->setFrameStamp(_frameStamp.get());
 471     viewer->setUpdateVisitor(_updateVisitor.get());
 472     fgSetDouble("/sim/startup/splash-alpha", 1.0);
 473 }
 474
 475 class ShadowMapSizeListener : public SGPropertyChangeListener {
 476 public:
 477     virtual void valueChanged(SGPropertyNode* node) {
 478         globals->get_renderer()->updateShadowMapSize(node->getIntValue());
 479     }
 480 };
 481
 482 class ShadowEnabledListener : public SGPropertyChangeListener {
 483 public:
 484     virtual void valueChanged(SGPropertyNode* node) {
 485         globals->get_renderer()->enableShadows(node->getBoolValue());
 486     }
 487 };
 488
 489 class ShadowNumListener : public SGPropertyChangeListener {
 490 public:
 491     virtual void valueChanged(SGPropertyNode* node) {
 492         globals->get_renderer()->updateCascadeNumber(node->getIntValue());
 493     }
 494 };
 495
 496 class ShadowRangeListener : public SGPropertyChangeListener {
 497 public:
 498     virtual void valueChanged(SGPropertyNode* node) {
 499         globals->get_renderer()->updateCascadeFar(node->getIndex(), node->getFloatValue());
 500     }
 501 };
 502
 503 void
 504 FGRenderer::addChangeListener(SGPropertyChangeListener* l, const char* path)
 505 {
 506     _listeners.push_back(l);
 507     fgAddChangeListener(l, path);
 508 }
 509
 510 void
 511 FGRenderer::init( void )
 512 {
 513     if (!eventHandler)
 514         eventHandler = new FGEventHandler();
 515
 516     sgUserDataInit( globals->get_props() );
 517
 518     _classicalRenderer = !fgGetBool("/sim/rendering/rembrandt/enabled", false);
 519     _shadowMapSize    = fgGetInt( "/sim/rendering/shadows/map-size", 4096 );
 520     addChangeListener( new ShadowMapSizeListener, "/sim/rendering/shadows/map-size" );
 521     addChangeListener( new ShadowEnabledListener, "/sim/rendering/shadows/enabled" );
 522     ShadowRangeListener* srl = new ShadowRangeListener;
 523     addChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[0]");
 524     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[1]");
 525     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[2]");
 526     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[3]");
 527     addChangeListener(new ShadowNumListener, "/sim/rendering/shadows/num-cascades");
 528     _numCascades = fgGetInt("/sim/rendering/shadows/num-cascades", 4);
 529     _cascadeFar[0] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[0]", 5.0f);
 530     _cascadeFar[1] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[1]", 50.0f);
 531     _cascadeFar[2] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[2]", 500.0f);
 532     _cascadeFar[3] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[3]", 5000.0f);
 533     updateCascadeNumber(_numCascades);
 534     updateCascadeFar(0, _cascadeFar[0]);
 535     updateCascadeFar(1, _cascadeFar[1]);
 536     updateCascadeFar(2, _cascadeFar[2]);
 537     updateCascadeFar(3, _cascadeFar[3]);
 538     _useColorForDepth = fgGetBool( "/sim/rendering/rembrandt/use-color-for-depth", false );
 539     _depthInColor->set( _useColorForDepth );
 540
 541     _renderer         = fgGetString("/sim/rendering/rembrandt/renderer", "default-pipeline");
 542     if (!_classicalRenderer)
 543         _pipeline = makeRenderingPipeline(_renderer, 0);
 544     _scenery_loaded   = fgGetNode("/sim/sceneryloaded", true);
 545     _position_finalized = fgGetNode("/sim/position-finalized", true);
 546
 547     _panel_hotspots   = fgGetNode("/sim/panel-hotspots", true);
 548     _virtual_cockpit  = fgGetNode("/sim/virtual-cockpit", true);
 549
 550     _sim_delta_sec = fgGetNode("/sim/time/delta-sec", true);
 551
 552     _xsize         = fgGetNode("/sim/startup/xsize", true);
 553     _ysize         = fgGetNode("/sim/startup/ysize", true);
 554     _splash_alpha  = fgGetNode("/sim/startup/splash-alpha", true);
 555
 556     _point_sprites        = fgGetNode("/sim/rendering/point-sprites", true);
 557     _enhanced_lighting    = fgGetNode("/sim/rendering/enhanced-lighting", true);
 558     _distance_attenuation = fgGetNode("/sim/rendering/distance-attenuation", true);
 559     _horizon_effect       = fgGetNode("/sim/rendering/horizon-effect", true);
 560
 561     _altitude_ft = fgGetNode("/position/altitude-ft", true);
 562
 563     _cloud_status = fgGetNode("/environment/clouds/status", true);
 564     _visibility_m = fgGetNode("/environment/visibility-m", true);
 565
 566     bool use_point_sprites = _point_sprites->getBoolValue();
 567     bool enhanced_lighting = _enhanced_lighting->getBoolValue();
 568     bool distance_attenuation = _distance_attenuation->getBoolValue();
 569
 570     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 571                                   distance_attenuation );
 572
 573     if (const char* tc = fgGetString("/sim/rendering/texture-compression", NULL)) {
 574       if (strcmp(tc, "false") == 0 || strcmp(tc, "off") == 0 ||
 575           strcmp(tc, "0") == 0 || strcmp(tc, "no") == 0 ||
 576           strcmp(tc, "none") == 0) {
 577         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::DoNotUseCompression);
 578       } else if (strcmp(tc, "arb") == 0) {
 579         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseARBCompression);
 580       } else if (strcmp(tc, "dxt1") == 0) {
 581         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT1Compression);
 582       } else if (strcmp(tc, "dxt3") == 0) {
 583         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT3Compression);
 584       } else if (strcmp(tc, "dxt5") == 0) {
 585         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT5Compression);
 586       } else {
 587         SG_LOG(SG_VIEW, SG_WARN, "Unknown texture compression setting!");
 588       }
 589     }
 590
 591 // create sky, but can't build until setupView, since we depend
 592 // on other subsystems to be inited, eg Ephemeris
 593     _sky = new SGSky;
 594
 595     SGPath texture_path(globals->get_fg_root());
 596     texture_path.append("Textures");
 597     texture_path.append("Sky");
 598     for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
 599         SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
 600         _sky->add_cloud_layer(layer);
 601     }
 602
 603     _sky->texture_path( texture_path.str() );
 604
 605     if (!_classicalRenderer) {
 606         eventHandler->setChangeStatsCameraRenderOrder( true );
 607     }
 608 }
 609
 610 void installCullVisitor(Camera* camera)
 611 {
 612     osgViewer::Renderer* renderer
 613         = static_cast<osgViewer::Renderer*>(camera->getRenderer());
 614     for (int i = 0; i < 2; ++i) {
 615         osgUtil::SceneView* sceneView = renderer->getSceneView(i);
 616
 617         osg::ref_ptr<osgUtil::CullVisitor::Identifier> identifier;
 618         identifier = sceneView->getCullVisitor()->getIdentifier();
 619         sceneView->setCullVisitor(new simgear::EffectCullVisitor);
 620         sceneView->getCullVisitor()->setIdentifier(identifier.get());
 621
 622         identifier = sceneView->getCullVisitorLeft()->getIdentifier();
 623         sceneView->setCullVisitorLeft(sceneView->getCullVisitor()->clone());
 624         sceneView->getCullVisitorLeft()->setIdentifier(identifier.get());
 625
 626         identifier = sceneView->getCullVisitorRight()->getIdentifier();
 627         sceneView->setCullVisitorRight(sceneView->getCullVisitor()->clone());
 628         sceneView->getCullVisitorRight()->setIdentifier(identifier.get());
 629
 630     }
 631 }
 632
 633 CameraInfo*
 634 FGRenderer::buildRenderingPipeline(CameraGroup* cgroup, unsigned flags, Camera* camera,
 635                                    const Matrix& view,
 636                                    const Matrix& projection,
 637                                                                    osg::GraphicsContext* gc,
 638                                    bool useMasterSceneData)
 639 {
 640         CameraInfo* info = 0;
 641         if (!_classicalRenderer && (flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0)
 642                 info = buildDeferredPipeline( cgroup, flags, camera, view, projection, gc );
 643
 644         if (info) {
 645                 return info;
 646         } else {
 647                 if ((flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0)
 648                         _classicalRenderer = true;
 649                 return buildClassicalPipeline( cgroup, flags, camera, view, projection, useMasterSceneData );
 650         }
 651 }
 652
 653 CameraInfo*
 654 FGRenderer::buildClassicalPipeline(CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
 655                                 const osg::Matrix& view,
 656                                 const osg::Matrix& projection,
 657                                 bool useMasterSceneData)
 658 {
 659     CameraInfo* info = new CameraInfo(flags);
 660     // The camera group will always update the camera
 661     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
 662     info->name = "classic";
 663
 664     Camera* farCamera = 0;
 665     if ((flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0) {
 666         farCamera = new Camera;
 667         farCamera->setName("farCamera");
 668         farCamera->setAllowEventFocus(camera->getAllowEventFocus());
 669         farCamera->setGraphicsContext(camera->getGraphicsContext());
 670         farCamera->setCullingMode(camera->getCullingMode());
 671         farCamera->setInheritanceMask(camera->getInheritanceMask());
 672         farCamera->setReferenceFrame(Transform::ABSOLUTE_RF);
 673         // Each camera's viewport is written when the window is
 674         // resized; if the the viewport isn't copied here, it gets updated
 675         // twice and ends up with the wrong value.
 676         farCamera->setViewport(simgear::clone(camera->getViewport()));
 677         farCamera->setDrawBuffer(camera->getDrawBuffer());
 678         farCamera->setReadBuffer(camera->getReadBuffer());
 679         farCamera->setRenderTargetImplementation(
 680             camera->getRenderTargetImplementation());
 681         const Camera::BufferAttachmentMap& bufferMap
 682             = camera->getBufferAttachmentMap();
 683         if (bufferMap.count(Camera::COLOR_BUFFER) != 0) {
 684             farCamera->attach(
 685                 Camera::COLOR_BUFFER,
 686                 bufferMap.find(Camera::COLOR_BUFFER)->second._texture.get());
 687         }
 688         cgroup->getViewer()->addSlave(farCamera, projection, view, useMasterSceneData);
 689         installCullVisitor(farCamera);
 690                 int farSlaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
 691                 info->addCamera( FAR_CAMERA, farCamera, farSlaveIndex );
 692         farCamera->setRenderOrder(Camera::POST_RENDER, farSlaveIndex);
 693         camera->setCullMask(camera->getCullMask() & ~simgear::BACKGROUND_BIT);
 694         camera->setClearMask(GL_DEPTH_BUFFER_BIT);
 695     }
 696     cgroup->getViewer()->addSlave(camera, projection, view, useMasterSceneData);
 697     installCullVisitor(camera);
 698     int slaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
 699     info->addCamera( MAIN_CAMERA, camera, slaveIndex );
 700     camera->setRenderOrder(Camera::POST_RENDER, slaveIndex);
 701     cgroup->addCamera(info);
 702     return info;
 703 }
 704
 705 class FGDeferredRenderingCameraCullCallback : public osg::NodeCallback {
 706 public:
 707     FGDeferredRenderingCameraCullCallback( const std::string& k, CameraInfo* i, bool nd = false ) : kind( k ), info( i ), needsDuDv(nd) {}
 708     virtual void operator()( osg::Node *n, osg::NodeVisitor *nv) {
 709         simgear::EffectCullVisitor* cv = dynamic_cast<simgear::EffectCullVisitor*>(nv);
 710         osg::Camera* camera = static_cast<osg::Camera*>(n);
 711
 712         cv->clearBufferList();
 713         for (RenderBufferMap::iterator ii = info->buffers.begin(); ii != info->buffers.end(); ++ii) {
 714             cv->addBuffer(ii->first, ii->second.texture);
 715         }
 716
 717         if ( !info->getRenderStageInfo(kind).fullscreen )
 718             info->setMatrices( camera );
 719
 720         if (needsDuDv) {
 721             osg::Matrix projInverse;
 722             info->projInverse->get( projInverse );
 723
 724             osg::Vec4 p0 = osg::Vec4( -1.0, -1.0, 0.0, 1.0 ) * projInverse;
 725             info->du->set( osg::Vec4(  1.0, -1.0, 0.0, 1.0 ) * projInverse - p0 );
 726             info->dv->set( osg::Vec4( -1.0,  1.0, 0.0, 1.0 ) * projInverse - p0 );
 727         }
 728
 729         cv->traverse( *camera );
 730
 731         if ( kind == GEOMETRY_CAMERA ) {
 732             // Remove transparent bins. They will be renderer in the additional light stage (side effect)
 733             osgUtil::RenderStage* renderStage = cv->getRenderStage();
 734             osgUtil::RenderBin::RenderBinList& rbl = renderStage->getRenderBinList();
 735             for (osgUtil::RenderBin::RenderBinList::iterator rbi = rbl.begin(); rbi != rbl.end(); ) {
 736                 if (rbi->second->getSortMode() == osgUtil::RenderBin::SORT_BACK_TO_FRONT) {
 737                     rbl.erase( rbi++ );
 738                 } else {
 739                     ++rbi;
 740                 }
 741             }
 742         } else if ( kind == LIGHTING_CAMERA ) {
 743             osg::ref_ptr<osg::Camera> mainShadowCamera = info->getCamera( SHADOW_CAMERA );
 744             if (mainShadowCamera.valid()) {
 745                 osg::Switch* grp = mainShadowCamera->getChild(0)->asSwitch();
 746                 for (int i = 0; i < 4; ++i ) {
 747                     if (!grp->getValue(i))
 748                         continue;
 749
 750                     osg::Camera* cascadeCam = static_cast<osg::Camera*>( grp->getChild(i) );
 751                     osg::Matrixf shadowMatrix = camera->getInverseViewMatrix() *
 752                                                 cascadeCam->getViewMatrix() *
 753                                                 cascadeCam->getProjectionMatrix() *
 754                                                 osg::Matrix::translate(1.0, 1.0, 1.0) *
 755                                                 osg::Matrix::scale(0.5f, 0.5f, 0.5f);
 756
 757                     info->shadowMatrix[i]->set( shadowMatrix );
 758                 }
 759             }
 760         }
 761     }
 762
 763 private:
 764     std::string kind;
 765     CameraInfo* info;
 766     bool needsDuDv;
 767 };
 768
 769 osg::Texture2D* buildDeferredBuffer(GLint internalFormat, GLenum sourceFormat, GLenum sourceType, GLenum wrapMode, bool shadowComparison = false)
 770 {
 771     osg::Texture2D* tex = new osg::Texture2D;
 772     tex->setResizeNonPowerOfTwoHint( false );
 773     tex->setInternalFormat( internalFormat );
 774     tex->setShadowComparison(shadowComparison);
 775     if (shadowComparison) {
 776         tex->setShadowTextureMode(osg::Texture2D::LUMINANCE);
 777         tex->setBorderColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
 778     }
 779     tex->setSourceFormat(sourceFormat);
 780     tex->setSourceType(sourceType);
 781     tex->setFilter( osg::Texture2D::MIN_FILTER, osg::Texture2D::LINEAR );
 782     tex->setFilter( osg::Texture2D::MAG_FILTER, osg::Texture2D::LINEAR );
 783     tex->setWrap( osg::Texture::WRAP_S, (osg::Texture::WrapMode)wrapMode );
 784     tex->setWrap( osg::Texture::WRAP_T, (osg::Texture::WrapMode)wrapMode );
 785         return tex;
 786 }
 787
 788 void attachBufferToCamera( CameraInfo* info, osg::Camera* camera, osg::Camera::BufferComponent c, const std::string& ck, const std::string& bk )
 789 {
 790     camera->attach( c, info->getBuffer(bk) );
 791     info->getRenderStageInfo(ck).buffers.insert( std::make_pair( c, bk ) );
 792 }
 793
 794 void buildAttachments(CameraInfo* info, osg::Camera* camera, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments) {
 795     BOOST_FOREACH(ref_ptr<FGRenderingPipeline::Attachment> attachment, attachments) {
 796         if (attachment->valid())
 797             attachBufferToCamera( info, camera, attachment->component, name, attachment->buffer );
 798     }
 799 }
 800
 801 osg::Camera* FGRenderer::buildDeferredGeometryCamera( CameraInfo* info, osg::GraphicsContext* gc, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments )
 802 {
 803     osg::Camera* camera = new osg::Camera;
 804     info->addCamera(name, camera );
 805
 806     camera->setCullMask( ~simgear::MODELLIGHT_BIT );
 807     camera->setName( "GeometryC" );
 808     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
 809     camera->setGraphicsContext( gc );
 810     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( name, info ) );
 811     camera->setClearMask( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
 812     camera->setClearColor( osg::Vec4( 0., 0., 0., 0. ) );
 813     camera->setClearDepth( 1.0 );
 814     camera->setColorMask(true, true, true, true);
 815     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
 816     camera->setRenderOrder(osg::Camera::NESTED_RENDER, 0);
 817     camera->setViewport( new osg::Viewport );
 818     buildAttachments(info, camera, name, attachments);
 819     camera->setDrawBuffer(GL_FRONT);
 820     camera->setReadBuffer(GL_FRONT);
 821
 822     osg::StateSet* ss = camera->getOrCreateStateSet();
 823     ss->addUniform( _depthInColor );
 824
 825     camera->addChild( _deferredRealRoot.get() );
 826
 827     return camera;
 828 }
 829
 830 static void setShadowCascadeStateSet( osg::Camera* cam ) {
 831     osg::StateSet* ss = cam->getOrCreateStateSet();
 832     ss->setAttribute( new osg::PolygonOffset( 1.1f, 5.0f ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 833     ss->setMode( GL_POLYGON_OFFSET_FILL, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 834     ss->setRenderBinDetails( 0, "RenderBin", osg::StateSet::OVERRIDE_RENDERBIN_DETAILS );
 835     ss->setAttributeAndModes( new osg::AlphaFunc( osg::AlphaFunc::GREATER, 0.05 ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 836     ss->setAttributeAndModes( new osg::ColorMask( false, false, false, false ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 837     ss->setAttributeAndModes( new osg::CullFace( osg::CullFace::FRONT ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 838     osg::Program* program = new osg::Program;
 839     ss->setAttribute( program, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON );
 840     ss->setMode( GL_LIGHTING, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 841     ss->setMode( GL_BLEND, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 842     //ss->setTextureMode( 0, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON );
 843     ss->setTextureMode( 0, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 844     ss->setTextureMode( 1, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 845     ss->setTextureMode( 1, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 846     ss->setTextureMode( 2, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 847     ss->setTextureMode( 2, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 848 }
 849
 850 static osg::Camera* createShadowCascadeCamera( int no, int cascadeSize ) {
 851     osg::Camera* cascadeCam = new osg::Camera;
 852     setShadowCascadeStateSet( cascadeCam );
 853
 854     std::ostringstream oss;
 855     oss << "CascadeCamera" << (no + 1);
 856     cascadeCam->setName( oss.str() );
 857     cascadeCam->setClearMask(0);
 858     cascadeCam->setCullMask( simgear::CASTSHADOW_BIT );
 859     cascadeCam->setCullingMode( cascadeCam->getCullingMode() | osg::CullSettings::SMALL_FEATURE_CULLING );
 860     cascadeCam->setAllowEventFocus(false);
 861     cascadeCam->setReferenceFrame(osg::Transform::ABSOLUTE_RF_INHERIT_VIEWPOINT);
 862     cascadeCam->setRenderOrder(osg::Camera::NESTED_RENDER);
 863     cascadeCam->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 864     cascadeCam->setViewport( int( no / 2 ) * cascadeSize, (no & 1) * cascadeSize, cascadeSize, cascadeSize );
 865     return cascadeCam;
 866 }
 867
 868 osg::Camera* FGRenderer::buildDeferredShadowCamera( CameraInfo* info, osg::GraphicsContext* gc, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments )
 869 {
 870     osg::Camera* mainShadowCamera = new osg::Camera;
 871     info->addCamera(name, mainShadowCamera, 0.0f );
 872
 873     mainShadowCamera->setName( "ShadowC" );
 874     mainShadowCamera->setClearMask( GL_DEPTH_BUFFER_BIT );
 875     mainShadowCamera->setClearDepth( 1.0 );
 876     mainShadowCamera->setAllowEventFocus(false);
 877     mainShadowCamera->setGraphicsContext(gc);
 878     mainShadowCamera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
 879     buildAttachments(info, mainShadowCamera, name, attachments);
 880     mainShadowCamera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
 881     mainShadowCamera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
 882     mainShadowCamera->setProjectionMatrix(osg::Matrix::identity());
 883     mainShadowCamera->setCullingMode( osg::CullSettings::NO_CULLING );
 884     mainShadowCamera->setViewport( 0, 0, _shadowMapSize, _shadowMapSize );
 885     mainShadowCamera->setDrawBuffer(GL_FRONT);
 886     mainShadowCamera->setReadBuffer(GL_FRONT);
 887     mainShadowCamera->setRenderOrder(Camera::NESTED_RENDER, 1);
 888
 889     osg::Switch* shadowSwitch = new osg::Switch;
 890     mainShadowCamera->addChild( shadowSwitch );
 891
 892     for (int i = 0; i < 4; ++i ) {
 893         osg::Camera* cascadeCam = createShadowCascadeCamera( i, _shadowMapSize/2 );
 894         cascadeCam->addChild( _deferredRealRoot.get() );
 895         shadowSwitch->addChild( cascadeCam );
 896     }
 897     if (fgGetBool("/sim/rendering/shadows/enabled", true))
 898         shadowSwitch->setAllChildrenOn();
 899     else
 900         shadowSwitch->setAllChildrenOff();
 901
 902     return mainShadowCamera;
 903 }
 904
 905 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)
 906 {
 907     osg::Camera* cascade = static_cast<osg::Camera*>( grp->getChild(idx) );
 908     osg::Matrixd &viewMatrix = cascade->getViewMatrix();
 909     osg::Matrixd &projectionMatrix = cascade->getProjectionMatrix();
 910
 911     osg::BoundingSphere bs;
 912     bs.expandBy(osg::Vec3(left,bottom,-zNear) * f1);
 913     bs.expandBy(osg::Vec3(right,top,-zNear) * f2);
 914     bs.expandBy(osg::Vec3(left,bottom,-zNear) * f2);
 915     bs.expandBy(osg::Vec3(right,top,-zNear) * f1);
 916
 917     osg::Vec4 aim = osg::Vec4(bs.center(), 1.0) * camera->getInverseViewMatrix();
 918
 919     projectionMatrix.makeOrtho( -bs.radius(), bs.radius(), -bs.radius(), bs.radius(), 1., 15000.0 );
 920     osg::Vec3 position( aim.x(), aim.y(), aim.z() );
 921     viewMatrix.makeLookAt( position + (getSunDirection() * 10000.0), position, position );
 922 }
 923
 924 osg::Vec3 FGRenderer::getSunDirection() const
 925 {
 926     osg::Vec3 val;
 927     _sunDirection->get( val );
 928     return val;
 929 }
 930
 931 void FGRenderer::updateShadowCamera(const CameraInfo* info, const osg::Vec3d& position)
 932 {
 933     ref_ptr<Camera> mainShadowCamera = info->getCamera( SHADOW_CAMERA );
 934     if (mainShadowCamera.valid()) {
 935         ref_ptr<Switch> shadowSwitch = mainShadowCamera->getChild( 0 )->asSwitch();
 936         osg::Vec3d up = position,
 937             dir = getSunDirection();
 938         up.normalize();
 939         dir.normalize();
 940         // cos(100 deg) == -0.17
 941         if (up * dir < -0.17 || !fgGetBool("/sim/rendering/shadows/enabled", true)) {
 942             shadowSwitch->setAllChildrenOff();
 943         } else {
 944             double left,right,bottom,top,zNear,zFar;
 945             ref_ptr<Camera> camera = info->getCamera(GEOMETRY_CAMERA);
 946             camera->getProjectionMatrix().getFrustum(left,right,bottom,top,zNear,zFar);
 947
 948             shadowSwitch->setAllChildrenOn();
 949             if (_numCascades == 1) {
 950                 osg::Camera* cascadeCam = static_cast<osg::Camera*>( shadowSwitch->getChild(0) );
 951                 cascadeCam->setViewport( 0, 0, _shadowMapSize, _shadowMapSize );
 952             } else {
 953                 for (int no = 0; no < 4; ++no) {
 954                     osg::Camera* cascadeCam = static_cast<osg::Camera*>( shadowSwitch->getChild(no) );
 955                     cascadeCam->setViewport( int( no / 2 ) * (_shadowMapSize/2), (no & 1) * (_shadowMapSize/2), (_shadowMapSize/2), (_shadowMapSize/2) );
 956                 }
 957             }
 958             updateShadowCascade(info, camera, shadowSwitch, 0, left, right, bottom, top, zNear, 1.0, _cascadeFar[0]/zNear);
 959             if (_numCascades > 1) {
 960                 shadowSwitch->setValue(1, true);
 961                 updateShadowCascade(info, camera, shadowSwitch, 1, left, right, bottom, top, zNear, _cascadeFar[0]/zNear, _cascadeFar[1]/zNear);
 962             } else {
 963                 shadowSwitch->setValue(1, false);
 964             }
 965             if (_numCascades > 2) {
 966                 shadowSwitch->setValue(2, true);
 967                 updateShadowCascade(info, camera, shadowSwitch, 2, left, right, bottom, top, zNear, _cascadeFar[1]/zNear, _cascadeFar[2]/zNear);
 968             } else {
 969                 shadowSwitch->setValue(2, false);
 970             }
 971             if (_numCascades > 3) {
 972                 shadowSwitch->setValue(3, true);
 973                 updateShadowCascade(info, camera, shadowSwitch, 3, left, right, bottom, top, zNear, _cascadeFar[2]/zNear, _cascadeFar[3]/zNear);
 974             } else {
 975                 shadowSwitch->setValue(3, false);
 976             }
 977             {
 978             osg::Matrixd &viewMatrix = mainShadowCamera->getViewMatrix();
 979
 980             osg::Vec4 aim = osg::Vec4( 0.0, 0.0, 0.0, 1.0 ) * camera->getInverseViewMatrix();
 981
 982             osg::Vec3 position( aim.x(), aim.y(), aim.z() );
 983             viewMatrix.makeLookAt( position, position + (getSunDirection() * 10000.0), position );
 984             }
 985         }
 986     }
 987 }
 988
 989 void FGRenderer::updateShadowMapSize(int mapSize)
 990 {
 991     if ( ((~( mapSize-1 )) & mapSize) != mapSize ) {
 992         SG_LOG( SG_VIEW, SG_ALERT, "Map size is not a power of two" );
 993         return;
 994     }
 995     for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
 996             ii != CameraGroup::getDefault()->camerasEnd();
 997             ++ii )
 998     {
 999         CameraInfo* info = ii->get();
1000         Camera* camera = info->getCamera(SHADOW_CAMERA);
1001         if (camera == 0) continue;
1002
1003         Texture2D* tex = info->getBuffer("shadow");
1004         if (tex == 0) continue;
1005
1006         tex->setTextureSize( mapSize, mapSize );
1007         tex->dirtyTextureObject();
1008
1009         Viewport* vp = camera->getViewport();
1010         vp->width() = mapSize;
1011         vp->height() = mapSize;
1012
1013         osgViewer::Renderer* renderer
1014             = static_cast<osgViewer::Renderer*>(camera->getRenderer());
1015         for (int i = 0; i < 2; ++i) {
1016             osgUtil::SceneView* sceneView = renderer->getSceneView(i);
1017             sceneView->getRenderStage()->setFrameBufferObject(0);
1018             sceneView->getRenderStage()->setCameraRequiresSetUp(true);
1019             if (sceneView->getRenderStageLeft()) {
1020                 sceneView->getRenderStageLeft()->setFrameBufferObject(0);
1021                 sceneView->getRenderStageLeft()->setCameraRequiresSetUp(true);
1022             }
1023             if (sceneView->getRenderStageRight()) {
1024                 sceneView->getRenderStageRight()->setFrameBufferObject(0);
1025                 sceneView->getRenderStageRight()->setCameraRequiresSetUp(true);
1026             }
1027         }
1028
1029         int cascadeSize = mapSize / 2;
1030         Group* grp = camera->getChild(0)->asGroup();
1031         for (int i = 0; i < 4; ++i ) {
1032             Camera* cascadeCam = static_cast<Camera*>( grp->getChild(i) );
1033             cascadeCam->setViewport( int( i / 2 ) * cascadeSize, (i & 1) * cascadeSize, cascadeSize, cascadeSize );
1034         }
1035
1036         _shadowMapSize = mapSize;
1037     }
1038 }
1039
1040 void FGRenderer::enableShadows(bool enabled)
1041 {
1042     for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
1043             ii != CameraGroup::getDefault()->camerasEnd();
1044             ++ii )
1045     {
1046         CameraInfo* info = ii->get();
1047         Camera* camera = info->getCamera(SHADOW_CAMERA);
1048         if (camera == 0) continue;
1049
1050         osg::Switch* shadowSwitch = camera->getChild(0)->asSwitch();
1051         if (enabled)
1052             shadowSwitch->setAllChildrenOn();
1053         else
1054             shadowSwitch->setAllChildrenOff();
1055     }
1056 }
1057
1058 void FGRenderer::updateCascadeFar(int index, float far_m)
1059 {
1060     if (index < 0 || index > 3)
1061         return;
1062     _cascadeFar[index] = far_m;
1063     _shadowDistances->set( osg::Vec4f(_cascadeFar[0], _cascadeFar[1], _cascadeFar[2], _cascadeFar[3]) );
1064 }
1065
1066 void FGRenderer::updateCascadeNumber(size_t num)
1067 {
1068     if (num < 1 || num > 4)
1069         return;
1070     _numCascades = num;
1071     _shadowNumber->set( (int)_numCascades );
1072 }
1073
1074 class DebugPassListener : public SGPropertyChangeListener {
1075 public:
1076     DebugPassListener(osg::Switch* sw, int i) : _switch(sw), _index(i) {}
1077     virtual void valueChanged(SGPropertyNode* node) {
1078         _switch->setValue(_index, node->getBoolValue());
1079     }
1080
1081 private:
1082     osg::ref_ptr<osg::Switch> _switch;
1083     int _index;
1084 };
1085
1086 osg::Camera*
1087 FGRenderer::buildDeferredLightingCamera( flightgear::CameraInfo* info, osg::GraphicsContext* gc, const FGRenderingPipeline::Stage* stage )
1088 {
1089     osg::Camera* camera = new osg::Camera;
1090     info->addCamera(stage->name, camera );
1091
1092     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( stage->name, info ) );
1093     camera->setAllowEventFocus(false);
1094     camera->setGraphicsContext(gc);
1095     camera->setViewport(new Viewport);
1096     camera->setName(stage->name+"C");
1097     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1098     camera->setRenderOrder(osg::Camera::NESTED_RENDER, stage->orderNum);
1099     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1100     camera->setViewport( new osg::Viewport );
1101     buildAttachments(info, camera, stage->name, stage->attachments);
1102     camera->setDrawBuffer(GL_FRONT);
1103     camera->setReadBuffer(GL_FRONT);
1104     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1105     osg::StateSet* ss = camera->getOrCreateStateSet();
1106     ss->setAttribute( new osg::Depth(osg::Depth::LESS, 0.0, 1.0, false) );
1107     ss->addUniform( _depthInColor );
1108
1109     osg::Switch* lightingGroup = new osg::Switch;
1110
1111     BOOST_FOREACH( osg::ref_ptr<FGRenderingPipeline::Pass> pass, stage->passes ) {
1112         ref_ptr<Node> node = buildPass(info, pass);
1113         if (node.valid()) {
1114             lightingGroup->addChild(node);
1115             if (!pass->debugProperty.empty()) {
1116                 lightingGroup->setValue(lightingGroup->getNumChildren()-1, fgGetBool(pass->debugProperty));
1117                 fgAddChangeListener(new DebugPassListener(lightingGroup, lightingGroup->getNumChildren()-1), pass->debugProperty);
1118             }
1119         }
1120     }
1121
1122     camera->addChild( lightingGroup );
1123
1124     return camera;
1125 }
1126
1127 CameraInfo*
1128 FGRenderer::buildDeferredPipeline(CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
1129                                     const osg::Matrix& view,
1130                                     const osg::Matrix& projection,
1131                                     osg::GraphicsContext* gc)
1132 {
1133     return buildCameraFromRenderingPipeline(_pipeline, cgroup, flags, camera, view, projection, gc);
1134 }
1135
1136 osg::Camera*
1137 FGRenderer::buildDeferredFullscreenCamera( flightgear::CameraInfo* info, const FGRenderingPipeline::Pass* pass )
1138 {
1139     osg::Camera* camera = new osg::Camera;
1140
1141     camera->setClearMask( 0 );
1142     camera->setAllowEventFocus(false);
1143     camera->setName(pass->name+"C");
1144     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1145     camera->setRenderOrder(osg::Camera::NESTED_RENDER, pass->orderNum);
1146     camera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1147     camera->setViewMatrix(osg::Matrix::identity());
1148     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1149
1150     osg::StateSet* ss = camera->getOrCreateStateSet();
1151     ss->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1152     ss->addUniform( info->projInverse );
1153     ss->addUniform( info->viewInverse );
1154     ss->addUniform( info->view );
1155     ss->addUniform( info->bufferSize );
1156     ss->addUniform( info->worldPosCart );
1157     ss->addUniform( info->worldPosGeod );
1158     ss->addUniform( info->shadowMatrix[0] );
1159     ss->addUniform( info->shadowMatrix[1] );
1160     ss->addUniform( info->shadowMatrix[2] );
1161     ss->addUniform( info->shadowMatrix[3] );
1162     ss->addUniform( _ambientFactor );
1163     ss->addUniform( _sunDiffuse );
1164     ss->addUniform( _sunSpecular );
1165     ss->addUniform( _sunDirection );
1166     ss->addUniform( _planes );
1167     ss->addUniform( _shadowNumber );
1168     ss->addUniform( _shadowDistances );
1169     ss->addUniform( _fogColor );
1170     ss->addUniform( _fogDensity );
1171
1172     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1173     g->setUseDisplayList(false);
1174     simgear::EffectGeode* eg = new simgear::EffectGeode;
1175     osg::ref_ptr<SGReaderWriterOptions> opt;
1176     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1177     opt->setPropertyNode(globals->get_props());
1178     simgear::Effect* effect = simgear::makeEffect(pass->effect, true, opt.get());
1179     if (effect) {
1180         eg->setEffect( effect );
1181     }
1182
1183     eg->setName(pass->name+"Quad");
1184     eg->setCullingActive(false);
1185     eg->addDrawable(g);
1186     camera->addChild(eg);
1187
1188     return camera;
1189 }
1190
1191 osg::Camera*
1192 FGRenderer::buildDeferredFullscreenCamera( flightgear::CameraInfo* info, osg::GraphicsContext* gc, const FGRenderingPipeline::Stage* stage )
1193 {
1194     osg::Camera* camera = buildDeferredFullscreenCamera(info, static_cast<const FGRenderingPipeline::Pass*>(stage));
1195     info->addCamera(stage->name, camera, stage->scaleFactor, true);
1196
1197     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback(stage->name, info, stage->needsDuDv) );
1198     camera->setGraphicsContext(gc);
1199     camera->setViewport(new Viewport);
1200     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1201     buildAttachments(info, camera, stage->name, stage->attachments);
1202     camera->setDrawBuffer(GL_FRONT);
1203     camera->setReadBuffer(GL_FRONT);
1204     camera->setClearColor( osg::Vec4( 1., 1., 1., 1. ) );
1205     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1206     camera->setViewMatrix(osg::Matrix::identity());
1207     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1208
1209     osg::StateSet* ss = camera->getOrCreateStateSet();
1210     if (stage->needsDuDv) {
1211         ss->addUniform( info->du );
1212         ss->addUniform( info->dv );
1213     }
1214
1215     return camera;
1216 }
1217
1218 void
1219 FGRenderer::buildDeferredDisplayCamera( osg::Camera* camera, flightgear::CameraInfo* info, const FGRenderingPipeline::Stage* stage, osg::GraphicsContext* gc )
1220 {
1221     camera->setName( "DisplayC" );
1222     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( stage->name, info ) );
1223     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
1224     camera->setAllowEventFocus(false);
1225     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1226     g->setUseDisplayList(false); //DEBUG
1227     simgear::EffectGeode* eg = new simgear::EffectGeode;
1228     osg::ref_ptr<SGReaderWriterOptions> opt;
1229     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1230     opt->setPropertyNode(globals->get_props());
1231     simgear::Effect* effect = simgear::makeEffect(stage->effect, true, opt.get());
1232     if (!effect) {
1233         SG_LOG(SG_VIEW, SG_ALERT, stage->effect + " not found");
1234         return;
1235     }
1236     eg->setEffect(effect);
1237     eg->setCullingActive(false);
1238     eg->addDrawable(g);
1239     camera->setViewMatrix(osg::Matrix::identity());
1240     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1241     camera->addChild(eg);
1242
1243     osg::StateSet* ss = camera->getOrCreateStateSet();
1244     ss->addUniform( _depthInColor );
1245     ss->addUniform( info->projInverse );
1246     ss->addUniform( info->viewInverse );
1247     ss->addUniform( info->view );
1248     ss->addUniform( info->bufferSize );
1249     ss->addUniform( info->worldPosCart );
1250     ss->addUniform( info->worldPosGeod );
1251     ss->addUniform( info->shadowMatrix[0] );
1252     ss->addUniform( info->shadowMatrix[1] );
1253     ss->addUniform( info->shadowMatrix[2] );
1254     ss->addUniform( info->shadowMatrix[3] );
1255     ss->addUniform( _ambientFactor );
1256     ss->addUniform( _sunDiffuse );
1257     ss->addUniform( _sunSpecular );
1258     ss->addUniform( _sunDirection );
1259     ss->addUniform( _planes );
1260     ss->addUniform( _shadowNumber );
1261     ss->addUniform( _shadowDistances );
1262     ss->addUniform( _fogColor );
1263     ss->addUniform( _fogDensity );
1264 }
1265
1266 void
1267 FGRenderer::buildStage(CameraInfo* info,
1268                         FGRenderingPipeline::Stage* stage,
1269                         CameraGroup* cgroup,
1270                         osg::Camera* mainCamera,
1271                         const osg::Matrix& view, const osg::Matrix& projection, osg::GraphicsContext* gc)
1272 {
1273     if (!stage->valid())
1274         return;
1275
1276     ref_ptr<Camera> camera;
1277     bool needOffsets = false;
1278     if (stage->type == "geometry") {
1279         camera = buildDeferredGeometryCamera(info, gc, stage->name, stage->attachments);
1280         needOffsets = true;
1281     } else if (stage->type == "lighting") {
1282         camera = buildDeferredLightingCamera(info, gc, stage);
1283         needOffsets = true;
1284     } else if (stage->type == "shadow")
1285         camera = buildDeferredShadowCamera(info, gc, stage->name, stage->attachments);
1286     else if (stage->type == "fullscreen")
1287         camera = buildDeferredFullscreenCamera(info, gc, stage);
1288     else if (stage->type == "display") {
1289         camera = mainCamera;
1290         buildDeferredDisplayCamera(camera, info, stage, gc);
1291     } else
1292         throw sg_exception("Stage type is not supported");
1293
1294     if (needOffsets)
1295         cgroup->getViewer()->addSlave(camera, projection, view, false);
1296     else
1297         cgroup->getViewer()->addSlave(camera, false);
1298     installCullVisitor(camera);
1299     int slaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
1300     if (stage->type == "display")
1301         info->addCamera( stage->type, camera, slaveIndex, true );
1302     info->getRenderStageInfo(stage->name).slaveIndex = slaveIndex;
1303 }
1304
1305 osg::Node*
1306 FGRenderer::buildLightingSkyCloudsPass(FGRenderingPipeline::Pass* pass)
1307 {
1308     Group* group = new Group;
1309     group->setName("skyCloudsGroup");
1310     group->setNodeMask(simgear::BACKGROUND_BIT);
1311
1312     StateSet* ss = group->getOrCreateStateSet();
1313     ss->setAttributeAndModes( new osg::ColorMask( true, true, true, false ), osg::StateAttribute::ON );
1314     group->addChild( _sky->getPreRoot() );
1315     group->addChild( _sky->getCloudRoot() );
1316     return group;
1317 }
1318
1319 osg::Node*
1320 FGRenderer::buildLightingLightsPass(CameraInfo* info, FGRenderingPipeline::Pass* pass)
1321 {
1322     osg::Camera* lightCam = new osg::Camera;
1323     StateSet* ss = lightCam->getOrCreateStateSet();
1324     ss->addUniform( _planes );
1325     ss->addUniform( info->bufferSize );
1326     ss->addUniform( _fogColor );
1327     ss->addUniform( _fogDensity );
1328     lightCam->setName( "LightCamera" );
1329     lightCam->setClearMask(0);
1330     lightCam->setAllowEventFocus(false);
1331     lightCam->setReferenceFrame(osg::Transform::RELATIVE_RF);
1332     lightCam->setRenderOrder(osg::Camera::NESTED_RENDER,pass->orderNum);
1333     lightCam->setViewMatrix(osg::Matrix::identity());
1334     lightCam->setProjectionMatrix(osg::Matrix::identity());
1335     lightCam->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1336     lightCam->setCullMask( simgear::MODELLIGHT_BIT | simgear::PANEL2D_BIT | simgear::PERMANENTLIGHT_BIT);
1337     lightCam->setInheritanceMask( osg::CullSettings::ALL_VARIABLES & ~osg::CullSettings::CULL_MASK );
1338     lightCam->addChild( _deferredRealRoot.get() );
1339
1340     return lightCam;
1341 }
1342
1343 osg::Node*
1344 FGRenderer::buildPass(CameraInfo* info, FGRenderingPipeline::Pass* pass)
1345 {
1346     if (!pass->valid())
1347         return 0;
1348
1349     ref_ptr<Node> node;
1350     if (pass->type == "sky-clouds")
1351         node = buildLightingSkyCloudsPass(pass);
1352     else if (pass->type == "fullscreen")
1353         node = buildDeferredFullscreenCamera(info, pass);
1354     else if (pass->type == "lights")
1355         node = buildLightingLightsPass(info, pass);
1356     else
1357         throw sg_exception("Pass type is not supported");
1358
1359     return node.release();
1360 }
1361
1362 void
1363 FGRenderer::buildBuffers(FGRenderingPipeline* rpipe, CameraInfo* info)
1364 {
1365     for (size_t i = 0; i < rpipe->buffers.size(); ++i) {
1366         osg::ref_ptr<FGRenderingPipeline::Buffer> buffer = rpipe->buffers[i];
1367         if (buffer->valid()) {
1368             bool fullscreen = buffer->width == -1 && buffer->height == -1;
1369             info->addBuffer(buffer->name, buildDeferredBuffer( buffer->internalFormat,
1370                                                                 buffer->sourceFormat,
1371                                                                 buffer->sourceType,
1372                                                                 buffer->wrapMode,
1373                                                                 buffer->shadowComparison),
1374                             fullscreen ? buffer->scaleFactor : 0.0f);
1375             if (!fullscreen) {
1376                 info->getBuffer(buffer->name)->setTextureSize(buffer->width, buffer->height);
1377             }
1378         }
1379     }
1380 }
1381
1382 CameraInfo* FGRenderer::buildCameraFromRenderingPipeline(FGRenderingPipeline* rpipe, CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
1383                                     const osg::Matrix& view, const osg::Matrix& projection, osg::GraphicsContext* gc)
1384 {
1385     CameraInfo* info = new CameraInfo(flags);
1386     buildBuffers(rpipe, info);
1387
1388     for (size_t i = 0; i < rpipe->stages.size(); ++i) {
1389         osg::ref_ptr<FGRenderingPipeline::Stage> stage = rpipe->stages[i];
1390         buildStage(info, stage, cgroup, camera, view, projection, gc);
1391     }
1392
1393     cgroup->addCamera(info);
1394
1395     return info;
1396 }
1397
1398 void FGRenderer::setupRoot()
1399 {
1400     osg::StateSet* stateSet = _root->getOrCreateStateSet();
1401
1402     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
1403
1404     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
1405     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1406
1407     stateSet->setAttribute(new osg::BlendFunc);
1408     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
1409
1410     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
1411
1412     // this will be set below
1413     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
1414
1415     osg::Material* material = new osg::Material;
1416     stateSet->setAttribute(material);
1417
1418     stateSet->setTextureAttribute(0, new osg::TexEnv);
1419     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
1420
1421     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
1422     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
1423     stateSet->setAttribute(hint);
1424     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
1425     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
1426     stateSet->setAttribute(hint);
1427     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
1428     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
1429     stateSet->setAttribute(hint);
1430     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
1431     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
1432     stateSet->setAttribute(hint);
1433     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
1434     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
1435     stateSet->setAttribute(hint);
1436 }
1437
1438 void
1439 FGRenderer::setupView( void )
1440 {
1441     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1442     osg::initNotifyLevel();
1443
1444     // The number of polygon-offset "units" to place between layers.  In
1445     // principle, one is supposed to be enough.  In practice, I find that
1446     // my hardware/driver requires many more.
1447     osg::PolygonOffset::setUnitsMultiplier(1);
1448     osg::PolygonOffset::setFactorMultiplier(1);
1449
1450     setupRoot();
1451
1452 // build the sky
1453     Ephemeris* ephemerisSub = globals->get_subsystem<Ephemeris>();
1454
1455
1456     // The sun and moon diameters are scaled down numbers of the
1457     // actual diameters. This was needed to fit both the sun and the
1458     // moon within the distance to the far clip plane.
1459     // Moon diameter:    3,476 kilometers
1460     // Sun diameter: 1,390,000 kilometers
1461     osg::ref_ptr<SGReaderWriterOptions> opt;
1462     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1463     opt->setPropertyNode(globals->get_props());
1464     _sky->build( 80000.0, 80000.0,
1465                   463.3, 361.8,
1466                   *ephemerisSub->data(),
1467                   fgGetNode("/environment", true),
1468                   opt.get());
1469
1470     viewer->getCamera()
1471         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1472
1473
1474     // need to update the light on every frame
1475     // OSG LightSource objects are rather confusing. OSG only supports
1476     // the 10 lights specified by OpenGL itself; if more than one
1477     // LightSource in the scene graph have the same light number, it's
1478     // indeterminate which values will be used to render geometry that
1479     // has that light number enabled. Also, adding children to a
1480     // LightSource is just a shortcut for setting up a state set that
1481     // has the corresponding OpenGL light enabled: a LightSource will
1482     // affect geometry anywhere in the scene graph that has its light
1483     // number enabled in a state set.
1484     osg::ref_ptr<LightSource> lightSource = new LightSource;
1485     lightSource->setName("FGLightSource");
1486     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
1487     // relative because of CameraView being just a clever transform node
1488     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
1489     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
1490     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
1491     _viewerSceneRoot->addChild(lightSource);
1492
1493     // we need a white diffuse light for the phase of the moon
1494     osg::ref_ptr<LightSource> sunLight = new osg::LightSource;
1495     sunLight->setName("sunLightSource");
1496     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
1497     sunLight->getLight()->setLightNum(1);
1498     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
1499     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
1500     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
1501
1502     // Hang a StateSet above the sky subgraph in order to turn off
1503     // light 0
1504     Group* skyGroup = _sky->getPreRoot();
1505     StateSet* skySS = skyGroup->getOrCreateStateSet();
1506     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
1507     sunLight->addChild(skyGroup);
1508
1509     if ( _classicalRenderer ) {
1510         _root->addChild(sunLight);
1511     }
1512
1513     osg::Group* sceneGroup = globals->get_scenery()->get_scene_graph();
1514     sceneGroup->setName("rendererScene");
1515     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
1516     _root->addChild(sceneGroup);
1517
1518     // setup state-set for main scenery (including models and aircraft)
1519     osg::StateSet* stateSet = sceneGroup->getOrCreateStateSet();
1520     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
1521     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
1522
1523     // enable disable specular highlights.
1524     // is the place where we might plug in an other fragment shader ...
1525     osg::LightModel* lightModel = new osg::LightModel;
1526     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
1527     stateSet->setAttribute(lightModel);
1528
1529     // switch to enable wireframe
1530     osg::PolygonMode* polygonMode = new osg::PolygonMode;
1531     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
1532     stateSet->setAttributeAndModes(polygonMode);
1533
1534     // scene fog handling
1535     osg::Fog* fog = new osg::Fog;
1536     fog->setUpdateCallback(new FGFogUpdateCallback);
1537     stateSet->setAttributeAndModes(fog);
1538     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
1539
1540     // plug in the GUI
1541     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
1542     if (guiCamera) {
1543       osg::Geode* geode = new osg::Geode;
1544       geode->addDrawable(new SGHUDDrawable);
1545       geode->addDrawable(new SGPuDrawable);
1546
1547       // Draw first (eg. before Canvas GUI)
1548       guiCamera->insertChild(0, geode);
1549       guiCamera->insertChild(0, FGPanelNode::create2DPanelNode());
1550     }
1551
1552     osg::Switch* sw = new osg::Switch;
1553     sw->setName("scenerySwitch");
1554     sw->setUpdateCallback(new FGScenerySwitchCallback);
1555     sw->addChild(_root.get());
1556     _viewerSceneRoot->addChild(sw);
1557     // The clouds are attached directly to the scene graph root
1558     // because, in theory, they don't want the same default state set
1559     // as the rest of the scene. This may not be true in practice.
1560     if ( _classicalRenderer ) {
1561       _viewerSceneRoot->addChild(_sky->getCloudRoot());
1562       _viewerSceneRoot->addChild(FGCreateRedoutNode());
1563     }
1564
1565     // Attach empty program to the scene root so that shader programs
1566     // don't leak into state sets (effects) that shouldn't have one.
1567     stateSet = _viewerSceneRoot->getOrCreateStateSet();
1568     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
1569
1570     if ( !_classicalRenderer ) {
1571         _deferredRealRoot->addChild( _viewerSceneRoot.get() );
1572     }
1573 }
1574
1575 // Update all Visuals (redraws anything graphics related)
1576 void
1577 FGRenderer::update( ) {
1578     if (!_position_finalized || !_scenery_loaded->getBoolValue())
1579     {
1580         _splash_alpha->setDoubleValue(1.0);
1581         return;
1582     }
1583     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1584
1585     if (_splash_alpha->getDoubleValue()>0.0)
1586     {
1587         // Fade out the splash screen
1588         const double fade_time = 0.5;
1589         const double fade_steps_per_sec = 10;
1590         double delay_time = SGMiscd::min(fade_time/fade_steps_per_sec,
1591                                          (SGTimeStamp::now() - _splash_time).toSecs());
1592         _splash_time = SGTimeStamp::now();
1593         double sAlpha = _splash_alpha->getDoubleValue();
1594         sAlpha -= SGMiscd::max(0.0,delay_time/fade_time);
1595         FGScenerySwitchCallback::scenery_enabled = (sAlpha<1.0);
1596         _splash_alpha->setDoubleValue((sAlpha < 0) ? 0.0 : sAlpha);
1597
1598         syncPausePopupState();
1599     }
1600
1601     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
1602         if (!_classicalRenderer ) {
1603                 _ambientFactor->set( toOsg(l->scene_ambient()) );
1604                 _sunDiffuse->set( toOsg(l->scene_diffuse()) );
1605                 _sunSpecular->set( toOsg(l->scene_specular()) );
1606                 _sunDirection->set( osg::Vec3f(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]) );
1607         }
1608
1609     // update fog params
1610     double actual_visibility;
1611     if (_cloud_status->getBoolValue()) {
1612         actual_visibility = _sky->get_visibility();
1613     } else {
1614         actual_visibility = _visibility_m->getDoubleValue();
1615     }
1616
1617     // idle_state is now 1000 meaning we've finished all our
1618     // initializations and are running the main loop, so this will
1619     // now work without seg faulting the system.
1620
1621     flightgear::View *current__view = globals->get_current_view();
1622     // Force update of center dependent values ...
1623     current__view->set_dirty();
1624
1625     osg::Camera *camera = viewer->getCamera();
1626
1627     osg::Vec4 clear_color = _altitude_ft->getDoubleValue() < 250000
1628                           ? toOsg(l->adj_fog_color())
1629                           // skydome ends at ~262000ft (default rendering)
1630                           // ~328000 ft (ALS) and would produce a strange
1631                           // looking greyish space -> black looks much
1632                           // better :-)
1633                           : osg::Vec4(0, 0, 0, 1);
1634     camera->setClearColor(clear_color);
1635
1636     updateSky();
1637
1638     // need to call the update visitor once
1639     _frameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
1640     _updateVisitor->setViewData(current__view->getViewPosition(),
1641                                 current__view->getViewOrientation());
1642     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
1643     _updateVisitor->setLight(direction, l->scene_ambient(),
1644                              l->scene_diffuse(), l->scene_specular(),
1645                              l->adj_fog_color(),
1646                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
1647     _updateVisitor->setVisibility(actual_visibility);
1648     simgear::GroundLightManager::instance()->update(_updateVisitor.get());
1649     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
1650     cullMask |= simgear::GroundLightManager::instance()
1651         ->getLightNodeMask(_updateVisitor.get());
1652     if (_panel_hotspots->getBoolValue())
1653         cullMask |= simgear::PICK_BIT;
1654     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
1655         if ( !_classicalRenderer ) {
1656                 _fogColor->set( toOsg( l->adj_fog_color() ) );
1657                 _fogDensity->set( float( _updateVisitor->getFogExp2Density() ) );
1658         }
1659 }
1660
1661 void
1662 FGRenderer::updateSky()
1663 {
1664     // update fog params if visibility has changed
1665     double visibility_meters = _visibility_m->getDoubleValue();
1666     _sky->set_visibility(visibility_meters);
1667
1668     double altitude_m = _altitude_ft->getDoubleValue() * SG_FEET_TO_METER;
1669     _sky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
1670
1671     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
1672
1673     // The sun and moon distances are scaled down versions
1674     // of the actual distance to get both the moon and the sun
1675     // within the range of the far clip plane.
1676     // Moon distance:    384,467 kilometers
1677     // Sun distance: 150,000,000 kilometers
1678
1679     double sun_horiz_eff, moon_horiz_eff;
1680     if (_horizon_effect->getBoolValue()) {
1681         sun_horiz_eff
1682         = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
1683                                      0.0),
1684                      0.33) / 3.0;
1685         moon_horiz_eff
1686         = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
1687                                      0.0),
1688                      0.33)/3.0;
1689     } else {
1690         sun_horiz_eff = moon_horiz_eff = 1.0;
1691     }
1692
1693
1694
1695     SGSkyState sstate;
1696     sstate.pos       = globals->get_current_view()->getViewPosition();
1697     sstate.pos_geod  = globals->get_current_view()->getPosition();
1698     sstate.ori       = globals->get_current_view()->getViewOrientation();
1699     sstate.spin      = l->get_sun_rotation();
1700     sstate.gst       = globals->get_time_params()->getGst();
1701     sstate.sun_dist  = 50000.0 * sun_horiz_eff;
1702     sstate.moon_dist = 40000.0 * moon_horiz_eff;
1703     sstate.sun_angle = l->get_sun_angle();
1704
1705     SGSkyColor scolor;
1706     scolor.sky_color   = SGVec3f(l->sky_color().data());
1707     scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
1708     scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
1709     scolor.cloud_color = SGVec3f(l->cloud_color().data());
1710     scolor.sun_angle   = l->get_sun_angle();
1711     scolor.moon_angle  = l->get_moon_angle();
1712
1713     Ephemeris* ephemerisSub = globals->get_subsystem<Ephemeris>();
1714     double delta_time_sec = _sim_delta_sec->getDoubleValue();
1715     _sky->reposition( sstate, *ephemerisSub->data(), delta_time_sec );
1716     _sky->repaint( scolor, *ephemerisSub->data() );
1717 }
1718
1719 void
1720 FGRenderer::resize( int width, int height )
1721 {
1722     int curWidth = _xsize->getIntValue(),
1723         curHeight = _ysize->getIntValue();
1724     SG_LOG(SG_VIEW, SG_DEBUG, "FGRenderer::resize: new size " << width << " x " << height);
1725     if ((curHeight != height) || (curWidth != width)) {
1726     // must guard setting these, or PLIB-PUI fails with too many live interfaces
1727         _xsize->setIntValue(width);
1728         _ysize->setIntValue(height);
1729     }
1730 }
1731
1732 typedef osgUtil::LineSegmentIntersector::Intersection Intersection;
1733 SGVec2d uvFromIntersection(const Intersection& hit)
1734 {
1735   // Taken from http://trac.openscenegraph.org/projects/osg/browser/OpenSceneGraph/trunk/examples/osgmovie/osgmovie.cpp
1736
1737   osg::Drawable* drawable = hit.drawable.get();
1738   osg::Geometry* geometry = drawable ? drawable->asGeometry() : 0;
1739   osg::Vec3Array* vertices =
1740     geometry ? dynamic_cast<osg::Vec3Array*>(geometry->getVertexArray()) : 0;
1741
1742   if( !vertices )
1743   {
1744     SG_LOG(SG_INPUT, SG_WARN, "Unable to get vertices for intersection.");
1745     return SGVec2d(-9999,-9999);
1746   }
1747
1748   // get the vertex indices.
1749   const Intersection::IndexList& indices = hit.indexList;
1750   const Intersection::RatioList& ratios = hit.ratioList;
1751
1752   if( indices.size() != 3 || ratios.size() != 3 )
1753   {
1754     SG_LOG( SG_INPUT,
1755             SG_WARN,
1756             "Intersection has insufficient indices to work with." );
1757     return SGVec2d(-9999,-9999);
1758   }
1759
1760   unsigned int i1 = indices[0];
1761   unsigned int i2 = indices[1];
1762   unsigned int i3 = indices[2];
1763
1764   float r1 = ratios[0];
1765   float r2 = ratios[1];
1766   float r3 = ratios[2];
1767
1768   osg::Array* texcoords =
1769     (geometry->getNumTexCoordArrays() > 0) ? geometry->getTexCoordArray(0) : 0;
1770   osg::Vec2Array* texcoords_Vec2Array =
1771     dynamic_cast<osg::Vec2Array*>(texcoords);
1772
1773   if( !texcoords_Vec2Array )
1774   {
1775     SG_LOG(SG_INPUT, SG_WARN, "Unable to get texcoords for intersection.");
1776     return SGVec2d(-9999,-9999);
1777   }
1778
1779   // we have tex coord array so now we can compute the final tex coord at the
1780   // point of intersection.
1781   osg::Vec2 tc1 = (*texcoords_Vec2Array)[i1];
1782   osg::Vec2 tc2 = (*texcoords_Vec2Array)[i2];
1783   osg::Vec2 tc3 = (*texcoords_Vec2Array)[i3];
1784
1785   return toSG( osg::Vec2d(tc1 * r1 + tc2 * r2 + tc3 * r3) );
1786 }
1787
1788 bool
1789 FGRenderer::pick(std::vector<SGSceneryPick>& pickList, const osg::Vec2& windowPos)
1790 {
1791     // wipe out the return ...
1792     pickList.clear();
1793     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
1794     Intersections intersections;
1795
1796     if (!computeIntersections(CameraGroup::getDefault(), windowPos, intersections))
1797         return false;
1798     for (Intersections::iterator hit = intersections.begin(),
1799              e = intersections.end();
1800          hit != e;
1801          ++hit) {
1802         const osg::NodePath& np = hit->nodePath;
1803         osg::NodePath::const_reverse_iterator npi;
1804
1805         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1806             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1807             if (!ud || (ud->getNumPickCallbacks() == 0))
1808                 continue;
1809
1810             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1811                 SGPickCallback* pickCallback = ud->getPickCallback(i);
1812                 if (!pickCallback)
1813                     continue;
1814                 SGSceneryPick sceneryPick;
1815                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
1816                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
1817
1818                 if( pickCallback->needsUV() )
1819                   sceneryPick.info.uv = uvFromIntersection(*hit);
1820
1821                 sceneryPick.callback = pickCallback;
1822                 pickList.push_back(sceneryPick);
1823             } // of installed pick callbacks iteration
1824         } // of reverse node path walk
1825     }
1826
1827     return !pickList.empty();
1828 }
1829
1830 void
1831 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
1832 {
1833     viewer = viewer_;
1834 }
1835
1836 void
1837 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
1838 {
1839     eventHandler = eventHandler_;
1840 }
1841
1842 void
1843 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
1844 {
1845     _viewerSceneRoot->addChild(camera);
1846 }
1847
1848 void
1849 FGRenderer::removeCamera(osg::Camera* camera)
1850 {
1851     _viewerSceneRoot->removeChild(camera);
1852 }
1853
1854 void
1855 FGRenderer::setPlanes( double zNear, double zFar )
1856 {
1857         _planes->set( osg::Vec3f( - zFar, - zFar * zNear, zFar - zNear ) );
1858 }
1859
1860 bool
1861 fgDumpSceneGraphToFile(const char* filename)
1862 {
1863     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1864     return osgDB::writeNodeFile(*viewer->getSceneData(), filename);
1865 }
1866
1867 bool
1868 fgDumpTerrainBranchToFile(const char* filename)
1869 {
1870     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
1871                                  filename );
1872 }
1873
1874 // For debugging
1875 bool
1876 fgDumpNodeToFile(osg::Node* node, const char* filename)
1877 {
1878     return osgDB::writeNodeFile(*node, filename);
1879 }
1880
1881 namespace flightgear
1882 {
1883 using namespace osg;
1884
1885 class VisibleSceneInfoVistor : public NodeVisitor, CullStack
1886 {
1887 public:
1888     VisibleSceneInfoVistor()
1889         : NodeVisitor(CULL_VISITOR, TRAVERSE_ACTIVE_CHILDREN)
1890     {
1891         setCullingMode(CullSettings::SMALL_FEATURE_CULLING
1892                        | CullSettings::VIEW_FRUSTUM_CULLING);
1893         setComputeNearFarMode(CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1894     }
1895
1896     VisibleSceneInfoVistor(const VisibleSceneInfoVistor& rhs)
1897     {
1898     }
1899
1900     META_NodeVisitor("flightgear","VisibleSceneInfoVistor")
1901
1902     typedef std::map<const std::string,int> InfoMap;
1903
1904     void getNodeInfo(Node* node)
1905     {
1906         const char* typeName = typeid(*node).name();
1907         classInfo[typeName]++;
1908         const std::string& nodeName = node->getName();
1909         if (!nodeName.empty())
1910             nodeInfo[nodeName]++;
1911     }
1912
1913     void dumpInfo()
1914     {
1915         using namespace std;
1916         typedef vector<InfoMap::iterator> FreqVector;
1917         cout << "class info:\n";
1918         FreqVector classes;
1919         for (InfoMap::iterator itr = classInfo.begin(), end = classInfo.end();
1920              itr != end;
1921              ++itr)
1922             classes.push_back(itr);
1923         sort(classes.begin(), classes.end(), freqComp);
1924         for (FreqVector::iterator itr = classes.begin(), end = classes.end();
1925              itr != end;
1926              ++itr) {
1927             cout << (*itr)->first << " " << (*itr)->second << "\n";
1928         }
1929         cout << "\nnode info:\n";
1930         FreqVector nodes;
1931         for (InfoMap::iterator itr = nodeInfo.begin(), end = nodeInfo.end();
1932              itr != end;
1933              ++itr)
1934             nodes.push_back(itr);
1935
1936         sort (nodes.begin(), nodes.end(), freqComp);
1937         for (FreqVector::iterator itr = nodes.begin(), end = nodes.end();
1938              itr != end;
1939              ++itr) {
1940             cout << (*itr)->first << " " << (*itr)->second << "\n";
1941         }
1942         cout << endl;
1943     }
1944
1945     void doTraversal(Camera* camera, Node* root, Viewport* viewport)
1946     {
1947         ref_ptr<RefMatrix> projection
1948             = createOrReuseMatrix(camera->getProjectionMatrix());
1949         ref_ptr<RefMatrix> mv = createOrReuseMatrix(camera->getViewMatrix());
1950         if (!viewport)
1951             viewport = camera->getViewport();
1952         if (viewport)
1953             pushViewport(viewport);
1954         pushProjectionMatrix(projection.get());
1955         pushModelViewMatrix(mv.get(), Transform::ABSOLUTE_RF);
1956         root->accept(*this);
1957         popModelViewMatrix();
1958         popProjectionMatrix();
1959         if (viewport)
1960             popViewport();
1961         dumpInfo();
1962     }
1963
1964     void apply(Node& node)
1965     {
1966         if (isCulled(node))
1967             return;
1968         pushCurrentMask();
1969         getNodeInfo(&node);
1970         traverse(node);
1971         popCurrentMask();
1972     }
1973     void apply(Group& node)
1974     {
1975         if (isCulled(node))
1976             return;
1977         pushCurrentMask();
1978         getNodeInfo(&node);
1979         traverse(node);
1980         popCurrentMask();
1981     }
1982
1983     void apply(Transform& node)
1984     {
1985         if (isCulled(node))
1986             return;
1987         pushCurrentMask();
1988         ref_ptr<RefMatrix> matrix = createOrReuseMatrix(*getModelViewMatrix());
1989         node.computeLocalToWorldMatrix(*matrix,this);
1990         pushModelViewMatrix(matrix.get(), node.getReferenceFrame());
1991         getNodeInfo(&node);
1992         traverse(node);
1993         popModelViewMatrix();
1994         popCurrentMask();
1995     }
1996
1997     void apply(Camera& camera)
1998     {
1999         // Save current cull settings
2000         CullSettings saved_cull_settings(*this);
2001
2002         // set cull settings from this Camera
2003         setCullSettings(camera);
2004         // inherit the settings from above
2005         inheritCullSettings(saved_cull_settings, camera.getInheritanceMask());
2006
2007         // set the cull mask.
2008         unsigned int savedTraversalMask = getTraversalMask();
2009         bool mustSetCullMask = (camera.getInheritanceMask()
2010                                 & osg::CullSettings::CULL_MASK) == 0;
2011         if (mustSetCullMask)
2012             setTraversalMask(camera.getCullMask());
2013
2014         osg::RefMatrix* projection = 0;
2015         osg::RefMatrix* modelview = 0;
2016
2017         if (camera.getReferenceFrame()==osg::Transform::RELATIVE_RF) {
2018             if (camera.getTransformOrder()==osg::Camera::POST_MULTIPLY) {
2019                 projection = createOrReuseMatrix(*getProjectionMatrix()
2020                                                  *camera.getProjectionMatrix());
2021                 modelview = createOrReuseMatrix(*getModelViewMatrix()
2022                                                 * camera.getViewMatrix());
2023             }
2024             else {              // pre multiply
2025                 projection = createOrReuseMatrix(camera.getProjectionMatrix()
2026                                                  * (*getProjectionMatrix()));
2027                 modelview = createOrReuseMatrix(camera.getViewMatrix()
2028                                                 * (*getModelViewMatrix()));
2029             }
2030         } else {
2031             // an absolute reference frame
2032             projection = createOrReuseMatrix(camera.getProjectionMatrix());
2033             modelview = createOrReuseMatrix(camera.getViewMatrix());
2034         }
2035         if (camera.getViewport())
2036             pushViewport(camera.getViewport());
2037
2038         pushProjectionMatrix(projection);
2039         pushModelViewMatrix(modelview, camera.getReferenceFrame());
2040
2041         traverse(camera);
2042
2043         // restore the previous model view matrix.
2044         popModelViewMatrix();
2045
2046         // restore the previous model view matrix.
2047         popProjectionMatrix();
2048
2049         if (camera.getViewport()) popViewport();
2050
2051         // restore the previous traversal mask settings
2052         if (mustSetCullMask)
2053             setTraversalMask(savedTraversalMask);
2054
2055         // restore the previous cull settings
2056         setCullSettings(saved_cull_settings);
2057     }
2058
2059 protected:
2060     // sort in reverse
2061     static bool freqComp(const InfoMap::iterator& lhs, const InfoMap::iterator& rhs)
2062     {
2063         return lhs->second > rhs->second;
2064     }
2065     InfoMap classInfo;
2066     InfoMap nodeInfo;
2067 };
2068
2069 bool printVisibleSceneInfo(FGRenderer* renderer)
2070 {
2071     osgViewer::Viewer* viewer = renderer->getViewer();
2072     VisibleSceneInfoVistor vsv;
2073     Viewport* vp = 0;
2074     if (!viewer->getCamera()->getViewport() && viewer->getNumSlaves() > 0) {
2075         const osg::View::Slave& slave = viewer->getSlave(0);
2076         vp = slave._camera->getViewport();
2077     }
2078     vsv.doTraversal(viewer->getCamera(), viewer->getSceneData(), vp);
2079     return true;
2080 }
2081
2082 }
2083 // end of renderer.cxx
2084