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