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/SGUpdateVisitor.hxx>
  78 #include <simgear/scene/util/RenderConstants.hxx>
  79 #include <simgear/scene/util/SGSceneUserData.hxx>
  80 #include <simgear/scene/tgdb/GroundLightManager.hxx>
  81 #include <simgear/scene/tgdb/pt_lights.hxx>
  82 #include <simgear/scene/tgdb/userdata.hxx>
  83 #include <simgear/structure/OSGUtils.hxx>
  84 #include <simgear/props/props.hxx>
  85 #include <simgear/timing/sg_time.hxx>
  86 #include <simgear/ephemeris/ephemeris.hxx>
  87 #include <simgear/math/sg_random.h>
  88 #ifdef FG_JPEG_SERVER
  89 #include <simgear/screen/jpgfactory.hxx>
  90 #endif
  91
  92 #include <Time/light.hxx>
  93 #include <Time/light.hxx>
  94 #include <Cockpit/panel.hxx>
  95
  96 #include <Model/panelnode.hxx>
  97 #include <Model/modelmgr.hxx>
  98 #include <Model/acmodel.hxx>
  99 #include <Scenery/scenery.hxx>
 100 #include <Scenery/redout.hxx>
 101 #include <GUI/new_gui.hxx>
 102 #include <Instrumentation/HUD/HUD.hxx>
 103 #include <Environment/precipitation_mgr.hxx>
 104 #include <Environment/environment_mgr.hxx>
 105
 106 //#include <Main/main.hxx>
 107 #include "viewer.hxx"
 108 #include "viewmgr.hxx"
 109 #include "splash.hxx"
 110 #include "renderer.hxx"
 111 #include "CameraGroup.hxx"
 112 #include "FGEventHandler.hxx"
 113
 114 using namespace osg;
 115 using namespace simgear;
 116 using namespace flightgear;
 117
 118 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 119 public:
 120   FGHintUpdateCallback(const char* configNode) :
 121     mConfigNode(fgGetNode(configNode, true))
 122   { }
 123   virtual void operator()(osg::StateAttribute* stateAttribute,
 124                           osg::NodeVisitor*)
 125   {
 126     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 127     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 128
 129     const char* value = mConfigNode->getStringValue();
 130     if (!value)
 131       hint->setMode(GL_DONT_CARE);
 132     else if (0 == strcmp(value, "nicest"))
 133       hint->setMode(GL_NICEST);
 134     else if (0 == strcmp(value, "fastest"))
 135       hint->setMode(GL_FASTEST);
 136     else
 137       hint->setMode(GL_DONT_CARE);
 138   }
 139 private:
 140   SGPropertyNode_ptr mConfigNode;
 141 };
 142
 143
 144 class SGPuDrawable : public osg::Drawable {
 145 public:
 146   SGPuDrawable()
 147   {
 148     // Dynamic stuff, do not store geometry
 149     setUseDisplayList(false);
 150     setDataVariance(Object::DYNAMIC);
 151
 152     osg::StateSet* stateSet = getOrCreateStateSet();
 153     stateSet->setRenderBinDetails(1001, "RenderBin");
 154     // speed optimization?
 155     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 156     // We can do translucent menus, so why not. :-)
 157     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 158     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 159     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 160
 161     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 162
 163     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 164     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 165   }
 166   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 167   { drawImplementation(*renderInfo.getState()); }
 168   void drawImplementation(osg::State& state) const
 169   {
 170     state.setActiveTextureUnit(0);
 171     state.setClientActiveTextureUnit(0);
 172
 173     state.disableAllVertexArrays();
 174
 175     glPushAttrib(GL_ALL_ATTRIB_BITS);
 176     glPushClientAttrib(~0u);
 177
 178     puDisplay();
 179
 180     glPopClientAttrib();
 181     glPopAttrib();
 182   }
 183
 184   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 185   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 186
 187 private:
 188 };
 189
 190 class SGHUDDrawable : public osg::Drawable {
 191 public:
 192   SGHUDDrawable()
 193   {
 194     // Dynamic stuff, do not store geometry
 195     setUseDisplayList(false);
 196     setDataVariance(Object::DYNAMIC);
 197
 198     osg::StateSet* stateSet = getOrCreateStateSet();
 199     stateSet->setRenderBinDetails(1000, "RenderBin");
 200
 201     // speed optimization?
 202     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 203     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 204     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 205     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 206     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 207
 208     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 209   }
 210   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 211   { drawImplementation(*renderInfo.getState()); }
 212   void drawImplementation(osg::State& state) const
 213   {
 214     state.setActiveTextureUnit(0);
 215     state.setClientActiveTextureUnit(0);
 216     state.disableAllVertexArrays();
 217
 218     glPushAttrib(GL_ALL_ATTRIB_BITS);
 219     glPushClientAttrib(~0u);
 220
 221     HUD *hud = static_cast<HUD*>(globals->get_subsystem("hud"));
 222     hud->draw(state);
 223
 224     glPopClientAttrib();
 225     glPopAttrib();
 226   }
 227
 228   virtual osg::Object* cloneType() const { return new SGHUDDrawable; }
 229   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDDrawable; }
 230
 231 private:
 232 };
 233
 234 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 235 public:
 236
 237   /**
 238    * @param isSun true if the light is the actual sun i.e., for
 239    * illuminating the moon.
 240    */
 241   FGLightSourceUpdateCallback(bool isSun = false) : _isSun(isSun) {}
 242   FGLightSourceUpdateCallback(const FGLightSourceUpdateCallback& nc,
 243                               const CopyOp& op)
 244     : NodeCallback(nc, op), _isSun(nc._isSun)
 245   {}
 246   META_Object(flightgear,FGLightSourceUpdateCallback);
 247
 248   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 249   {
 250     assert(dynamic_cast<osg::LightSource*>(node));
 251     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 252     osg::Light* light = lightSource->getLight();
 253
 254     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 255     if (_isSun) {
 256       light->setAmbient(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 257       light->setDiffuse(Vec4(1.0f, 1.0f, 1.0f, 1.0f));
 258       light->setSpecular(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 259     } else {
 260       light->setAmbient(toOsg(l->scene_ambient()));
 261       light->setDiffuse(toOsg(l->scene_diffuse()));
 262       light->setSpecular(toOsg(l->scene_specular()));
 263     }
 264     osg::Vec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 265     light->setPosition(position);
 266
 267     traverse(node, nv);
 268   }
 269 private:
 270   const bool _isSun;
 271 };
 272
 273 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 274 public:
 275   FGWireFrameModeUpdateCallback() :
 276     mWireframe(fgGetNode("/sim/rendering/wireframe", true))
 277   { }
 278   virtual void operator()(osg::StateAttribute* stateAttribute,
 279                           osg::NodeVisitor*)
 280   {
 281     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 282     osg::PolygonMode* polygonMode;
 283     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 284
 285     if (mWireframe->getBoolValue())
 286       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 287                            osg::PolygonMode::LINE);
 288     else
 289       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 290                            osg::PolygonMode::FILL);
 291   }
 292 private:
 293   SGPropertyNode_ptr mWireframe;
 294 };
 295
 296 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 297 public:
 298   FGLightModelUpdateCallback() :
 299     mHighlights(fgGetNode("/sim/rendering/specular-highlight", true))
 300   { }
 301   virtual void operator()(osg::StateAttribute* stateAttribute,
 302                           osg::NodeVisitor*)
 303   {
 304     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 305     osg::LightModel* lightModel;
 306     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 307
 308 #if 0
 309     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 310     lightModel->setAmbientIntensity(toOsg(l->scene_ambient());
 311 #else
 312     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 313 #endif
 314     lightModel->setTwoSided(true);
 315     lightModel->setLocalViewer(false);
 316
 317     if (mHighlights->getBoolValue()) {
 318       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 319     } else {
 320       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 321     }
 322   }
 323 private:
 324   SGPropertyNode_ptr mHighlights;
 325 };
 326
 327 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 328 public:
 329   FGFogEnableUpdateCallback() :
 330     mFogEnabled(fgGetNode("/sim/rendering/fog", true))
 331   { }
 332   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 333   {
 334     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 335       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 336     } else {
 337       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 338     }
 339   }
 340 private:
 341   SGPropertyNode_ptr mFogEnabled;
 342 };
 343
 344 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 345 public:
 346   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 347   {
 348     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 349     assert(dynamic_cast<osg::Fog*>(sa));
 350     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 351     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 352     fog->setMode(osg::Fog::EXP2);
 353     fog->setColor(toOsg(updateVisitor->getFogColor()));
 354     fog->setDensity(updateVisitor->getFogExp2Density());
 355   }
 356 };
 357
 358 // update callback for the switch node guarding that splash
 359 class FGScenerySwitchCallback : public osg::NodeCallback {
 360 public:
 361   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 362   {
 363     assert(dynamic_cast<osg::Switch*>(node));
 364     osg::Switch* sw = static_cast<osg::Switch*>(node);
 365
 366     bool enabled = scenery_enabled;
 367     sw->setValue(0, enabled);
 368     if (!enabled)
 369       return;
 370     traverse(node, nv);
 371   }
 372
 373   static bool scenery_enabled;
 374 };
 375
 376 bool FGScenerySwitchCallback::scenery_enabled = false;
 377
 378 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 379 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 380
 381 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 382 static osg::ref_ptr<osg::Group> mDeferredRealRoot = new osg::Group;
 383
 384 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 385
 386 static osg::ref_ptr<osg::Switch> panelSwitch;
 387
 388
 389 // update callback for the switch node controlling the 2D panel
 390 class FGPanelSwitchCallback : public osg::NodeCallback {
 391 public:
 392     virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 393     {
 394         assert(dynamic_cast<osg::Switch*>(node));
 395         osg::Switch* sw = static_cast<osg::Switch*>(node);
 396
 397         bool enabled = fgPanelVisible();
 398         sw->setValue(0, enabled);
 399         if (!enabled)
 400             return;
 401         traverse(node, nv);
 402     }
 403 };
 404
 405 #ifdef FG_JPEG_SERVER
 406 static void updateRenderer()
 407 {
 408     globals->get_renderer()->update();
 409 }
 410 #endif
 411
 412 FGRenderer::FGRenderer() :
 413     _sky(NULL),
 414     _ambientFactor( new osg::Uniform( "fg_SunAmbientColor", osg::Vec4f() ) ),
 415     _sunDiffuse( new osg::Uniform( "fg_SunDiffuseColor", osg::Vec4f() ) ),
 416     _sunSpecular( new osg::Uniform( "fg_SunSpecularColor", osg::Vec4f() ) ),
 417     _sunDirection( new osg::Uniform( "fg_SunDirection", osg::Vec3f() ) ),
 418     _planes( new osg::Uniform( "fg_Planes", osg::Vec3f() ) ),
 419     _fogColor( new osg::Uniform( "fg_FogColor", osg::Vec4f(1.0, 1.0, 1.0, 1.0) ) ),
 420     _fogDensity( new osg::Uniform( "fg_FogDensity", 0.0001f ) ),
 421     _shadowNumber( new osg::Uniform( "fg_ShadowNumber", (int)4 ) ),
 422     _shadowDistances( new osg::Uniform( "fg_ShadowDistances", osg::Vec4f(5.0, 50.0, 500.0, 5000.0 ) ) ),
 423     _depthInColor( new osg::Uniform( "fg_DepthInColor", false ) )
 424 {
 425 #ifdef FG_JPEG_SERVER
 426    jpgRenderFrame = updateRenderer;
 427 #endif
 428    eventHandler = new FGEventHandler;
 429
 430    _numCascades = 4;
 431    _cascadeFar[0] = 5.f;
 432    _cascadeFar[1] = 50.f;
 433    _cascadeFar[2] = 500.f;
 434    _cascadeFar[3] = 5000.f;
 435 }
 436
 437 FGRenderer::~FGRenderer()
 438 {
 439 #ifdef FG_JPEG_SERVER
 440    jpgRenderFrame = NULL;
 441 #endif
 442     delete _sky;
 443 }
 444
 445 // Initialize various GL/view parameters
 446 // XXX This should be called "preinit" or something, as it initializes
 447 // critical parts of the scene graph in addition to the splash screen.
 448 void
 449 FGRenderer::splashinit( void ) {
 450     osgViewer::Viewer* viewer = getViewer();
 451     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 452     ref_ptr<Node> splashNode = fgCreateSplashNode();
 453     if (_classicalRenderer) {
 454         mRealRoot->addChild(splashNode.get());
 455     } else {
 456         for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
 457                 ii != CameraGroup::getDefault()->camerasEnd();
 458                 ++ii )
 459         {
 460             CameraInfo* info = ii->get();
 461             Camera* camera = info->getCamera(DISPLAY_CAMERA);
 462             if (camera == 0) continue;
 463
 464             camera->addChild(splashNode.get());
 465         }
 466     }
 467     mFrameStamp = viewer->getFrameStamp();
 468     // Scene doesn't seem to pass the frame stamp to the update
 469     // visitor automatically.
 470     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 471     viewer->setUpdateVisitor(mUpdateVisitor.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::init( void )
 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     _scenery_override = fgGetNode("/sim/sceneryloaded-override", true);
 536     _panel_hotspots   = fgGetNode("/sim/panel-hotspots", true);
 537     _virtual_cockpit  = fgGetNode("/sim/virtual-cockpit", true);
 538
 539     _sim_delta_sec = fgGetNode("/sim/time/delta-sec", true);
 540
 541     _xsize         = fgGetNode("/sim/startup/xsize", true);
 542     _ysize         = fgGetNode("/sim/startup/ysize", true);
 543     _splash_alpha  = fgGetNode("/sim/startup/splash-alpha", true);
 544
 545     _skyblend             = fgGetNode("/sim/rendering/skyblend", true);
 546     _point_sprites        = fgGetNode("/sim/rendering/point-sprites", true);
 547     _enhanced_lighting    = fgGetNode("/sim/rendering/enhanced-lighting", true);
 548     _distance_attenuation = fgGetNode("/sim/rendering/distance-attenuation", true);
 549     _horizon_effect       = fgGetNode("/sim/rendering/horizon-effect", true);
 550     _textures             = fgGetNode("/sim/rendering/textures", true);
 551
 552     _altitude_ft = fgGetNode("/position/altitude-ft", true);
 553
 554     _cloud_status = fgGetNode("/environment/clouds/status", true);
 555     _visibility_m = fgGetNode("/environment/visibility-m", true);
 556
 557     bool use_point_sprites = _point_sprites->getBoolValue();
 558     bool enhanced_lighting = _enhanced_lighting->getBoolValue();
 559     bool distance_attenuation = _distance_attenuation->getBoolValue();
 560
 561     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 562                                   distance_attenuation );
 563
 564     if (const char* tc = fgGetString("/sim/rendering/texture-compression", NULL)) {
 565       if (strcmp(tc, "false") == 0 || strcmp(tc, "off") == 0 ||
 566           strcmp(tc, "0") == 0 || strcmp(tc, "no") == 0 ||
 567           strcmp(tc, "none") == 0) {
 568         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::DoNotUseCompression);
 569       } else if (strcmp(tc, "arb") == 0) {
 570         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseARBCompression);
 571       } else if (strcmp(tc, "dxt1") == 0) {
 572         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT1Compression);
 573       } else if (strcmp(tc, "dxt3") == 0) {
 574         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT3Compression);
 575       } else if (strcmp(tc, "dxt5") == 0) {
 576         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT5Compression);
 577       } else {
 578         SG_LOG(SG_VIEW, SG_WARN, "Unknown texture compression setting!");
 579       }
 580     }
 581
 582 // create sky, but can't build until setupView, since we depend
 583 // on other subsystems to be inited, eg Ephemeris
 584     _sky = new SGSky;
 585
 586     SGPath texture_path(globals->get_fg_root());
 587     texture_path.append("Textures");
 588     texture_path.append("Sky");
 589     for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
 590         SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
 591         _sky->add_cloud_layer(layer);
 592     }
 593
 594     _sky->texture_path( texture_path.str() );
 595
 596     if (!_classicalRenderer) {
 597         eventHandler->setChangeStatsCameraRenderOrder( true );
 598     }
 599 }
 600
 601 void installCullVisitor(Camera* camera)
 602 {
 603     osgViewer::Renderer* renderer
 604         = static_cast<osgViewer::Renderer*>(camera->getRenderer());
 605     for (int i = 0; i < 2; ++i) {
 606         osgUtil::SceneView* sceneView = renderer->getSceneView(i);
 607 #if SG_OSG_VERSION_LESS_THAN(3,0,0)
 608         sceneView->setCullVisitor(new simgear::EffectCullVisitor);
 609 #else
 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 #endif
 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
 656     Camera* farCamera = 0;
 657     if ((flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0) {
 658         farCamera = new Camera;
 659         farCamera->setAllowEventFocus(camera->getAllowEventFocus());
 660         farCamera->setGraphicsContext(camera->getGraphicsContext());
 661         farCamera->setCullingMode(camera->getCullingMode());
 662         farCamera->setInheritanceMask(camera->getInheritanceMask());
 663         farCamera->setReferenceFrame(Transform::ABSOLUTE_RF);
 664         // Each camera's viewport is written when the window is
 665         // resized; if the the viewport isn't copied here, it gets updated
 666         // twice and ends up with the wrong value.
 667         farCamera->setViewport(simgear::clone(camera->getViewport()));
 668         farCamera->setDrawBuffer(camera->getDrawBuffer());
 669         farCamera->setReadBuffer(camera->getReadBuffer());
 670         farCamera->setRenderTargetImplementation(
 671             camera->getRenderTargetImplementation());
 672         const Camera::BufferAttachmentMap& bufferMap
 673             = camera->getBufferAttachmentMap();
 674         if (bufferMap.count(Camera::COLOR_BUFFER) != 0) {
 675             farCamera->attach(
 676                 Camera::COLOR_BUFFER,
 677                 bufferMap.find(Camera::COLOR_BUFFER)->second._texture.get());
 678         }
 679         cgroup->getViewer()->addSlave(farCamera, projection, view, useMasterSceneData);
 680         installCullVisitor(farCamera);
 681                 int farSlaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
 682                 info->addCamera( FAR_CAMERA, farCamera, farSlaveIndex );
 683         farCamera->setRenderOrder(Camera::POST_RENDER, farSlaveIndex);
 684         camera->setCullMask(camera->getCullMask() & ~simgear::BACKGROUND_BIT);
 685         camera->setClearMask(GL_DEPTH_BUFFER_BIT);
 686     }
 687     cgroup->getViewer()->addSlave(camera, projection, view, useMasterSceneData);
 688     installCullVisitor(camera);
 689     int slaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
 690         info->addCamera( MAIN_CAMERA, camera, slaveIndex );
 691     camera->setRenderOrder(Camera::POST_RENDER, slaveIndex);
 692     cgroup->addCamera(info);
 693     return info;
 694 }
 695
 696 class FGDeferredRenderingCameraCullCallback : public osg::NodeCallback {
 697 public:
 698     FGDeferredRenderingCameraCullCallback( const std::string& k, CameraInfo* i, bool nd = false ) : kind( k ), info( i ), needsDuDv(nd) {}
 699     virtual void operator()( osg::Node *n, osg::NodeVisitor *nv) {
 700         simgear::EffectCullVisitor* cv = dynamic_cast<simgear::EffectCullVisitor*>(nv);
 701         osg::Camera* camera = static_cast<osg::Camera*>(n);
 702
 703         cv->clearBufferList();
 704         for (RenderBufferMap::iterator ii = info->buffers.begin(); ii != info->buffers.end(); ++ii) {
 705             cv->addBuffer(ii->first, ii->second.texture);
 706         }
 707
 708         if ( !info->getRenderStageInfo(kind).fullscreen )
 709             info->setMatrices( camera );
 710
 711         if (needsDuDv) {
 712             osg::Matrix projInverse;
 713             info->projInverse->get( projInverse );
 714
 715             osg::Vec4 p0 = osg::Vec4( -1.0, -1.0, 0.0, 1.0 ) * projInverse;
 716             info->du->set( osg::Vec4(  1.0, -1.0, 0.0, 1.0 ) * projInverse - p0 );
 717             info->dv->set( osg::Vec4( -1.0,  1.0, 0.0, 1.0 ) * projInverse - p0 );
 718         }
 719
 720         cv->traverse( *camera );
 721
 722         if ( kind == GEOMETRY_CAMERA ) {
 723             // Save transparent bins to render later
 724             osgUtil::RenderStage* renderStage = cv->getRenderStage();
 725             osgUtil::RenderBin::RenderBinList& rbl = renderStage->getRenderBinList();
 726             for (osgUtil::RenderBin::RenderBinList::iterator rbi = rbl.begin(); rbi != rbl.end(); ) {
 727                 if (rbi->second->getSortMode() == osgUtil::RenderBin::SORT_BACK_TO_FRONT) {
 728                     info->savedTransparentBins.insert( std::make_pair( rbi->first, rbi->second ) );
 729                     rbl.erase( rbi++ );
 730                 } else {
 731                     ++rbi;
 732                 }
 733             }
 734         } else if ( kind == LIGHTING_CAMERA ) {
 735             osg::ref_ptr<osg::Camera> mainShadowCamera = info->getCamera( SHADOW_CAMERA );
 736             if (mainShadowCamera.valid()) {
 737                 osg::Switch* grp = mainShadowCamera->getChild(0)->asSwitch();
 738                 for (int i = 0; i < 4; ++i ) {
 739                     if (!grp->getValue(i))
 740                         continue;
 741                     osg::TexGen* shadowTexGen = info->shadowTexGen[i];
 742                     shadowTexGen->setMode(osg::TexGen::EYE_LINEAR);
 743
 744                     osg::Camera* cascadeCam = static_cast<osg::Camera*>( grp->getChild(i) );
 745                     // compute the matrix which takes a vertex from view coords into tex coords
 746                     shadowTexGen->setPlanesFromMatrix(  cascadeCam->getProjectionMatrix() *
 747                                                         osg::Matrix::translate(1.0,1.0,1.0) *
 748                                                         osg::Matrix::scale(0.5f,0.5f,0.5f) );
 749
 750                     osg::RefMatrix * refMatrix = new osg::RefMatrix( cascadeCam->getInverseViewMatrix() * *cv->getModelViewMatrix() );
 751
 752                     cv->getRenderStage()->getPositionalStateContainer()->addPositionedTextureAttribute( i+1, refMatrix, shadowTexGen );
 753                 }
 754             }
 755             // Render saved transparent render bins
 756             osgUtil::RenderStage* renderStage = cv->getRenderStage();
 757             osgUtil::RenderBin::RenderBinList& rbl = renderStage->getRenderBinList();
 758             for (osgUtil::RenderBin::RenderBinList::iterator rbi = info->savedTransparentBins.begin(); rbi != info->savedTransparentBins.end(); ++rbi ){
 759                 rbl.insert( std::make_pair( rbi->first + 10000, rbi->second ) );
 760             }
 761             info->savedTransparentBins.clear();
 762         }
 763     }
 764
 765 private:
 766     std::string kind;
 767     CameraInfo* info;
 768     bool needsDuDv;
 769 };
 770
 771 osg::Texture2D* buildDeferredBuffer(GLint internalFormat, GLenum sourceFormat, GLenum sourceType, GLenum wrapMode, bool shadowComparison = false)
 772 {
 773     osg::Texture2D* tex = new osg::Texture2D;
 774     tex->setResizeNonPowerOfTwoHint( false );
 775     tex->setInternalFormat( internalFormat );
 776     tex->setShadowComparison(shadowComparison);
 777     if (shadowComparison) {
 778         tex->setShadowTextureMode(osg::Texture2D::LUMINANCE);
 779         tex->setBorderColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
 780     }
 781     tex->setSourceFormat(sourceFormat);
 782     tex->setSourceType(sourceType);
 783     tex->setFilter( osg::Texture2D::MIN_FILTER, osg::Texture2D::LINEAR );
 784     tex->setFilter( osg::Texture2D::MAG_FILTER, osg::Texture2D::LINEAR );
 785     tex->setWrap( osg::Texture::WRAP_S, (osg::Texture::WrapMode)wrapMode );
 786     tex->setWrap( osg::Texture::WRAP_T, (osg::Texture::WrapMode)wrapMode );
 787         return tex;
 788 }
 789
 790 void attachBufferToCamera( CameraInfo* info, osg::Camera* camera, osg::Camera::BufferComponent c, const std::string& ck, const std::string& bk )
 791 {
 792     camera->attach( c, info->getBuffer(bk) );
 793     info->getRenderStageInfo(ck).buffers.insert( std::make_pair( c, bk ) );
 794 }
 795
 796 void buildAttachments(CameraInfo* info, osg::Camera* camera, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments) {
 797     BOOST_FOREACH(ref_ptr<FGRenderingPipeline::Attachment> attachment, attachments) {
 798         if (attachment->valid())
 799             attachBufferToCamera( info, camera, attachment->component, name, attachment->buffer );
 800     }
 801 }
 802
 803 osg::Camera* FGRenderer::buildDeferredGeometryCamera( CameraInfo* info, osg::GraphicsContext* gc, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments )
 804 {
 805     osg::Camera* camera = new osg::Camera;
 806     info->addCamera(name, camera );
 807
 808     camera->setCullMask( ~simgear::MODELLIGHT_BIT );
 809     camera->setName( "GeometryC" );
 810     camera->setGraphicsContext( gc );
 811     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( name, info ) );
 812     camera->setClearMask( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
 813     camera->setClearColor( osg::Vec4( 0., 0., 0., 0. ) );
 814     camera->setClearDepth( 1.0 );
 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( mDeferredRealRoot.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::MODELLIGHT_BIT /* | simgear::NO_SHADOW_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( mDeferredRealRoot.get() );
 895         shadowSwitch->addChild( cascadeCam );
 896         info->shadowTexGen[i] = new osg::TexGen;
 897     }
 898     if (fgGetBool("/sim/rendering/shadows/enabled", true))
 899         shadowSwitch->setAllChildrenOn();
 900     else
 901         shadowSwitch->setAllChildrenOff();
 902
 903     return mainShadowCamera;
 904 }
 905
 906 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)
 907 {
 908     osg::Camera* cascade = static_cast<osg::Camera*>( grp->getChild(idx) );
 909     osg::Matrixd &viewMatrix = cascade->getViewMatrix();
 910     osg::Matrixd &projectionMatrix = cascade->getProjectionMatrix();
 911
 912     osg::BoundingSphere bs;
 913     bs.expandBy(osg::Vec3(left,bottom,-zNear) * f1);
 914     bs.expandBy(osg::Vec3(right,top,-zNear) * f2);
 915     bs.expandBy(osg::Vec3(left,bottom,-zNear) * f2);
 916     bs.expandBy(osg::Vec3(right,top,-zNear) * f1);
 917
 918     osg::Vec4 aim = osg::Vec4(bs.center(), 1.0) * camera->getInverseViewMatrix();
 919
 920     projectionMatrix.makeOrtho( -bs.radius(), bs.radius(), -bs.radius(), bs.radius(), 1., 15000.0 );
 921     osg::Vec3 position( aim.x(), aim.y(), aim.z() );
 922     viewMatrix.makeLookAt( position + (getSunDirection() * 10000.0), position, position );
 923 }
 924
 925 osg::Vec3 FGRenderer::getSunDirection() const
 926 {
 927     osg::Vec3 val;
 928     _sunDirection->get( val );
 929     return val;
 930 }
 931
 932 void FGRenderer::updateShadowCamera(const CameraInfo* info, const osg::Vec3d& position)
 933 {
 934     ref_ptr<Camera> mainShadowCamera = info->getCamera( SHADOW_CAMERA );
 935     if (mainShadowCamera.valid()) {
 936         ref_ptr<Switch> shadowSwitch = mainShadowCamera->getChild( 0 )->asSwitch();
 937         osg::Vec3d up = position,
 938             dir = getSunDirection();
 939         up.normalize();
 940         dir.normalize();
 941         // cos(100 deg) == -0.17
 942         if (up * dir < -0.17 || !fgGetBool("/sim/rendering/shadows/enabled", true)) {
 943             shadowSwitch->setAllChildrenOff();
 944         } else {
 945             double left,right,bottom,top,zNear,zFar;
 946             ref_ptr<Camera> camera = info->getCamera(GEOMETRY_CAMERA);
 947             camera->getProjectionMatrix().getFrustum(left,right,bottom,top,zNear,zFar);
 948
 949             shadowSwitch->setAllChildrenOn();
 950             if (_numCascades == 1) {
 951                 osg::Camera* cascadeCam = static_cast<osg::Camera*>( shadowSwitch->getChild(0) );
 952                 cascadeCam->setViewport( 0, 0, _shadowMapSize, _shadowMapSize );
 953             } else {
 954                 for (int no = 0; no < 4; ++no) {
 955                     osg::Camera* cascadeCam = static_cast<osg::Camera*>( shadowSwitch->getChild(no) );
 956                     cascadeCam->setViewport( int( no / 2 ) * (_shadowMapSize/2), (no & 1) * (_shadowMapSize/2), (_shadowMapSize/2), (_shadowMapSize/2) );
 957                 }
 958             }
 959             updateShadowCascade(info, camera, shadowSwitch, 0, left, right, bottom, top, zNear, 1.0, _cascadeFar[0]/zNear);
 960             if (_numCascades > 1) {
 961                 shadowSwitch->setValue(1, true);
 962                 updateShadowCascade(info, camera, shadowSwitch, 1, left, right, bottom, top, zNear, _cascadeFar[0]/zNear, _cascadeFar[1]/zNear);
 963             } else {
 964                 shadowSwitch->setValue(1, false);
 965             }
 966             if (_numCascades > 2) {
 967                 shadowSwitch->setValue(2, true);
 968                 updateShadowCascade(info, camera, shadowSwitch, 2, left, right, bottom, top, zNear, _cascadeFar[1]/zNear, _cascadeFar[2]/zNear);
 969             } else {
 970                 shadowSwitch->setValue(2, false);
 971             }
 972             if (_numCascades > 3) {
 973                 shadowSwitch->setValue(3, true);
 974                 updateShadowCascade(info, camera, shadowSwitch, 3, left, right, bottom, top, zNear, _cascadeFar[2]/zNear, _cascadeFar[3]/zNear);
 975             } else {
 976                 shadowSwitch->setValue(3, false);
 977             }
 978             {
 979             osg::Matrixd &viewMatrix = mainShadowCamera->getViewMatrix();
 980
 981             osg::Vec4 aim = osg::Vec4( 0.0, 0.0, 0.0, 1.0 ) * camera->getInverseViewMatrix();
 982
 983             osg::Vec3 position( aim.x(), aim.y(), aim.z() );
 984             viewMatrix.makeLookAt( position, position + (getSunDirection() * 10000.0), position );
 985             }
 986         }
 987     }
 988 }
 989
 990 void FGRenderer::updateShadowMapSize(int mapSize)
 991 {
 992     if ( ((~( mapSize-1 )) & mapSize) != mapSize ) {
 993         SG_LOG( SG_VIEW, SG_ALERT, "Map size is not a power of two" );
 994         return;
 995     }
 996     for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
 997             ii != CameraGroup::getDefault()->camerasEnd();
 998             ++ii )
 999     {
1000         CameraInfo* info = ii->get();
1001         Camera* camera = info->getCamera(SHADOW_CAMERA);
1002         if (camera == 0) continue;
1003
1004         Texture2D* tex = info->getBuffer("shadow");
1005         if (tex == 0) continue;
1006
1007         tex->setTextureSize( mapSize, mapSize );
1008         tex->dirtyTextureObject();
1009
1010         Viewport* vp = camera->getViewport();
1011         vp->width() = mapSize;
1012         vp->height() = mapSize;
1013
1014         osgViewer::Renderer* renderer
1015             = static_cast<osgViewer::Renderer*>(camera->getRenderer());
1016         for (int i = 0; i < 2; ++i) {
1017             osgUtil::SceneView* sceneView = renderer->getSceneView(i);
1018             sceneView->getRenderStage()->setFrameBufferObject(0);
1019             sceneView->getRenderStage()->setCameraRequiresSetUp(true);
1020             if (sceneView->getRenderStageLeft()) {
1021                 sceneView->getRenderStageLeft()->setFrameBufferObject(0);
1022                 sceneView->getRenderStageLeft()->setCameraRequiresSetUp(true);
1023             }
1024             if (sceneView->getRenderStageRight()) {
1025                 sceneView->getRenderStageRight()->setFrameBufferObject(0);
1026                 sceneView->getRenderStageRight()->setCameraRequiresSetUp(true);
1027             }
1028         }
1029
1030         int cascadeSize = mapSize / 2;
1031         Group* grp = camera->getChild(0)->asGroup();
1032         for (int i = 0; i < 4; ++i ) {
1033             Camera* cascadeCam = static_cast<Camera*>( grp->getChild(i) );
1034             cascadeCam->setViewport( int( i / 2 ) * cascadeSize, (i & 1) * cascadeSize, cascadeSize, cascadeSize );
1035         }
1036
1037         _shadowMapSize = mapSize;
1038     }
1039 }
1040
1041 void FGRenderer::enableShadows(bool enabled)
1042 {
1043     for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
1044             ii != CameraGroup::getDefault()->camerasEnd();
1045             ++ii )
1046     {
1047         CameraInfo* info = ii->get();
1048         Camera* camera = info->getCamera(SHADOW_CAMERA);
1049         if (camera == 0) continue;
1050
1051         osg::Switch* shadowSwitch = camera->getChild(0)->asSwitch();
1052         if (enabled)
1053             shadowSwitch->setAllChildrenOn();
1054         else
1055             shadowSwitch->setAllChildrenOff();
1056     }
1057 }
1058
1059 void FGRenderer::updateCascadeFar(int index, float far_m)
1060 {
1061     if (index < 0 || index > 3)
1062         return;
1063     _cascadeFar[index] = far_m;
1064     _shadowDistances->set( osg::Vec4f(_cascadeFar[0], _cascadeFar[1], _cascadeFar[2], _cascadeFar[3]) );
1065 }
1066
1067 void FGRenderer::updateCascadeNumber(size_t num)
1068 {
1069     if (num < 1 || num > 4)
1070         return;
1071     _numCascades = num;
1072     _shadowNumber->set( (int)_numCascades );
1073 }
1074
1075 osg::Camera* FGRenderer::buildDeferredLightingCamera( CameraInfo* info, osg::GraphicsContext* gc, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments )
1076 {
1077     osg::Camera* camera = new osg::Camera;
1078     info->addCamera(name, camera );
1079
1080     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( name, info ) );
1081     camera->setAllowEventFocus(false);
1082     camera->setGraphicsContext(gc);
1083     camera->setViewport(new Viewport);
1084     camera->setName("LightingC");
1085     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1086     camera->setRenderOrder(osg::Camera::NESTED_RENDER, 50);
1087     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1088     camera->setViewport( new osg::Viewport );
1089     buildAttachments(info, camera, name, attachments);
1090     camera->setDrawBuffer(GL_FRONT);
1091     camera->setReadBuffer(GL_FRONT);
1092     camera->setClearColor( osg::Vec4( 0., 0., 0., 1. ) );
1093     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1094     osg::StateSet* ss = camera->getOrCreateStateSet();
1095     ss->setAttribute( new osg::Depth(osg::Depth::LESS, 0.0, 1.0, false) );
1096     ss->addUniform( _depthInColor );
1097
1098     osg::Group* lightingGroup = new osg::Group;
1099
1100     osg::Camera* quadCam1 = new osg::Camera;
1101     quadCam1->setName( "QuadCamera1" );
1102     quadCam1->setClearMask(0);
1103     quadCam1->setAllowEventFocus(false);
1104     quadCam1->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1105     quadCam1->setRenderOrder(osg::Camera::NESTED_RENDER);
1106     quadCam1->setViewMatrix(osg::Matrix::identity());
1107     quadCam1->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1108     quadCam1->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1109     ss = quadCam1->getOrCreateStateSet();
1110     ss->addUniform( _ambientFactor );
1111     ss->addUniform( info->projInverse );
1112     ss->addUniform( info->viewInverse );
1113     ss->addUniform( info->view );
1114     ss->addUniform( _sunDiffuse );
1115     ss->addUniform( _sunSpecular );
1116     ss->addUniform( _sunDirection );
1117     ss->addUniform( _planes );
1118     ss->addUniform( _shadowNumber );
1119     ss->addUniform( _shadowDistances );
1120
1121     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1122     g->setUseDisplayList(false);
1123     simgear::EffectGeode* eg = new simgear::EffectGeode;
1124     simgear::Effect* effect = simgear::makeEffect("Effects/ambient", true);
1125     if (!effect) {
1126         SG_LOG(SG_VIEW, SG_ALERT, "Effects/ambient not found");
1127         return 0;
1128     }
1129     eg->setEffect( effect );
1130     g->setName( "AmbientQuad" );
1131     eg->setName("AmbientQuad");
1132     eg->setCullingActive(false);
1133     eg->addDrawable(g);
1134     quadCam1->addChild( eg );
1135
1136     g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1137     g->setUseDisplayList(false);
1138     g->setName( "SunlightQuad" );
1139     eg = new simgear::EffectGeode;
1140     effect = simgear::makeEffect("Effects/sunlight", true);
1141     if (!effect) {
1142         SG_LOG(SG_VIEW, SG_ALERT, "Effects/sunlight not found");
1143         return 0;
1144     }
1145     eg->setEffect( effect );
1146     eg->setName("SunlightQuad");
1147     eg->setCullingActive(false);
1148     eg->addDrawable(g);
1149     quadCam1->addChild( eg );
1150
1151     osg::Camera* lightCam = new osg::Camera;
1152     ss = lightCam->getOrCreateStateSet();
1153     ss->addUniform( _planes );
1154     ss->addUniform( info->bufferSize );
1155     lightCam->setName( "LightCamera" );
1156     lightCam->setClearMask(0);
1157     lightCam->setAllowEventFocus(false);
1158     lightCam->setReferenceFrame(osg::Transform::RELATIVE_RF);
1159     lightCam->setRenderOrder(osg::Camera::NESTED_RENDER,1);
1160     lightCam->setViewMatrix(osg::Matrix::identity());
1161     lightCam->setProjectionMatrix(osg::Matrix::identity());
1162     lightCam->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1163     lightCam->setCullMask( simgear::MODELLIGHT_BIT );
1164     lightCam->setInheritanceMask( osg::CullSettings::ALL_VARIABLES & ~osg::CullSettings::CULL_MASK );
1165     lightCam->addChild( mDeferredRealRoot.get() );
1166
1167
1168     osg::Camera* quadCam2 = new osg::Camera;
1169     quadCam2->setName( "QuadCamera1" );
1170     quadCam2->setClearMask(0);
1171     quadCam2->setAllowEventFocus(false);
1172     quadCam2->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1173     quadCam2->setRenderOrder(osg::Camera::NESTED_RENDER,2);
1174     quadCam2->setViewMatrix(osg::Matrix::identity());
1175     quadCam2->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1176     quadCam2->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1177     ss = quadCam2->getOrCreateStateSet();
1178     ss->addUniform( _ambientFactor );
1179     ss->addUniform( info->projInverse );
1180     ss->addUniform( info->viewInverse );
1181     ss->addUniform( info->view );
1182     ss->addUniform( _sunDiffuse );
1183     ss->addUniform( _sunSpecular );
1184     ss->addUniform( _sunDirection );
1185     ss->addUniform( _fogColor );
1186     ss->addUniform( _fogDensity );
1187     ss->addUniform( _planes );
1188
1189     g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1190     g->setUseDisplayList(false);
1191     g->setName( "FogQuad" );
1192     eg = new simgear::EffectGeode;
1193     effect = simgear::makeEffect("Effects/fog", true);
1194     if (!effect) {
1195         SG_LOG(SG_VIEW, SG_ALERT, "Effects/fog not found");
1196         return 0;
1197     }
1198     eg->setEffect( effect );
1199     eg->setName("FogQuad");
1200     eg->setCullingActive(false);
1201     eg->addDrawable(g);
1202     quadCam2->addChild( eg );
1203
1204     lightingGroup->addChild( _sky->getPreRoot() );
1205     lightingGroup->addChild( _sky->getCloudRoot() );
1206     lightingGroup->addChild( quadCam1 );
1207     lightingGroup->addChild( lightCam );
1208     lightingGroup->addChild( quadCam2 );
1209
1210     camera->addChild( lightingGroup );
1211
1212     return camera;
1213 }
1214
1215 osg::Camera*
1216 FGRenderer::buildDeferredLightingCamera( flightgear::CameraInfo* info, osg::GraphicsContext* gc, const FGRenderingPipeline::Stage* stage )
1217 {
1218     osg::Camera* camera = new osg::Camera;
1219     info->addCamera(stage->name, camera );
1220
1221     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( stage->name, info ) );
1222     camera->setAllowEventFocus(false);
1223     camera->setGraphicsContext(gc);
1224     camera->setViewport(new Viewport);
1225     camera->setName(stage->name+"C");
1226     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1227     camera->setRenderOrder(osg::Camera::NESTED_RENDER, stage->orderNum);
1228     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1229     camera->setViewport( new osg::Viewport );
1230     buildAttachments(info, camera, stage->name, stage->attachments);
1231     camera->setDrawBuffer(GL_FRONT);
1232     camera->setReadBuffer(GL_FRONT);
1233     camera->setClearColor( osg::Vec4( 0., 0., 0., 1. ) );
1234     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1235     osg::StateSet* ss = camera->getOrCreateStateSet();
1236     ss->setAttribute( new osg::Depth(osg::Depth::LESS, 0.0, 1.0, false) );
1237     ss->addUniform( _depthInColor );
1238
1239     osg::Group* lightingGroup = new osg::Group;
1240
1241     BOOST_FOREACH( osg::ref_ptr<FGRenderingPipeline::Pass> pass, stage->passes ) {
1242         ref_ptr<Node> node = buildPass(info, pass);
1243         if (node.valid())
1244             lightingGroup->addChild(node);
1245     }
1246
1247     camera->addChild( lightingGroup );
1248
1249     return camera;
1250 }
1251
1252 CameraInfo*
1253 FGRenderer::buildDeferredPipeline(CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
1254                                     const osg::Matrix& view,
1255                                     const osg::Matrix& projection,
1256                                     osg::GraphicsContext* gc)
1257 {
1258     return buildCameraFromRenderingPipeline(_pipeline, cgroup, flags, camera, view, projection, gc);
1259 }
1260
1261 osg::Camera*
1262 FGRenderer::buildDeferredFullscreenCamera( flightgear::CameraInfo* info, const FGRenderingPipeline::Pass* pass )
1263 {
1264     osg::Camera* camera = new osg::Camera;
1265
1266     camera->setClearMask( 0 );
1267     camera->setAllowEventFocus(false);
1268     camera->setName(pass->name+"C");
1269     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1270     camera->setRenderOrder(osg::Camera::NESTED_RENDER, pass->orderNum);
1271     camera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1272     camera->setViewMatrix(osg::Matrix::identity());
1273     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1274
1275     osg::StateSet* ss = camera->getOrCreateStateSet();
1276     ss->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1277     ss->addUniform( info->projInverse );
1278     ss->addUniform( info->viewInverse );
1279     ss->addUniform( info->view );
1280     ss->addUniform( info->bufferSize );
1281     ss->addUniform( _ambientFactor );
1282     ss->addUniform( _sunDiffuse );
1283     ss->addUniform( _sunSpecular );
1284     ss->addUniform( _sunDirection );
1285     ss->addUniform( _planes );
1286     ss->addUniform( _shadowNumber );
1287     ss->addUniform( _shadowDistances );
1288     ss->addUniform( _fogColor );
1289     ss->addUniform( _fogDensity );
1290     ss->addUniform( _planes );
1291
1292     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1293     g->setUseDisplayList(false);
1294     simgear::EffectGeode* eg = new simgear::EffectGeode;
1295     simgear::Effect* effect = simgear::makeEffect(pass->effect, true);
1296     if (effect) {
1297         eg->setEffect( effect );
1298     }
1299
1300     eg->setName(pass->name+"Quad");
1301     eg->setCullingActive(false);
1302     eg->addDrawable(g);
1303     camera->addChild(eg);
1304
1305     return camera;
1306 }
1307
1308 osg::Camera*
1309 FGRenderer::buildDeferredFullscreenCamera( flightgear::CameraInfo* info, osg::GraphicsContext* gc, const FGRenderingPipeline::Stage* stage )
1310 {
1311     osg::Camera* camera = buildDeferredFullscreenCamera(info, static_cast<const FGRenderingPipeline::Pass*>(stage));
1312     info->addCamera(stage->name, camera, stage->scaleFactor, true);
1313
1314     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback(stage->name, info, stage->needsDuDv) );
1315     camera->setGraphicsContext(gc);
1316     camera->setViewport(new Viewport);
1317     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1318     buildAttachments(info, camera, stage->name, stage->attachments);
1319     camera->setDrawBuffer(GL_FRONT);
1320     camera->setReadBuffer(GL_FRONT);
1321     camera->setClearColor( osg::Vec4( 1., 1., 1., 1. ) );
1322     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1323     camera->setViewMatrix(osg::Matrix::identity());
1324     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1325
1326     osg::StateSet* ss = camera->getOrCreateStateSet();
1327     if (stage->needsDuDv) {
1328         ss->addUniform( info->du );
1329         ss->addUniform( info->dv );
1330     }
1331
1332     return camera;
1333 }
1334
1335 void
1336 FGRenderer::buildDeferredDisplayCamera( osg::Camera* camera, flightgear::CameraInfo* info, const std::string& name, osg::GraphicsContext* gc )
1337 {
1338     camera->setName( "DisplayC" );
1339     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( name, info ) );
1340     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
1341     camera->setAllowEventFocus(false);
1342     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1343     g->setUseDisplayList(false); //DEBUG
1344     simgear::EffectGeode* eg = new simgear::EffectGeode;
1345     simgear::Effect* effect = simgear::makeEffect("Effects/display", true);
1346     if (!effect) {
1347         SG_LOG(SG_VIEW, SG_ALERT, "Effects/display not found");
1348         return;
1349     }
1350     eg->setEffect(effect);
1351     eg->setCullingActive(false);
1352     eg->addDrawable(g);
1353     camera->setViewMatrix(osg::Matrix::identity());
1354     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1355     camera->addChild(eg);
1356
1357     osg::StateSet* ss = camera->getOrCreateStateSet();
1358     ss->addUniform( _depthInColor );
1359 }
1360
1361 void
1362 FGRenderer::buildStage(CameraInfo* info,
1363                         FGRenderingPipeline::Stage* stage,
1364                         CameraGroup* cgroup,
1365                         osg::Camera* mainCamera,
1366                         osg::GraphicsContext* gc)
1367 {
1368     if (!stage->valid())
1369         return;
1370
1371     ref_ptr<Camera> camera;
1372     if (stage->type == "geometry")
1373         camera = buildDeferredGeometryCamera(info, gc, stage->name, stage->attachments);
1374     else if (stage->type == "lighting-builtin")
1375         camera = buildDeferredLightingCamera(info, gc, stage->name, stage->attachments);
1376     else if (stage->type == "lighting")
1377         camera = buildDeferredLightingCamera(info, gc, stage);
1378     else if (stage->type == "shadow")
1379         camera = buildDeferredShadowCamera(info, gc, stage->name, stage->attachments);
1380     else if (stage->type == "fullscreen")
1381         camera = buildDeferredFullscreenCamera(info, gc, stage);
1382     else if (stage->type == "display") {
1383         camera = mainCamera;
1384         buildDeferredDisplayCamera(camera, info, stage->name, gc);
1385     } else
1386         throw sg_exception("Stage type is not supported");
1387
1388     cgroup->getViewer()->addSlave(camera, false);
1389     installCullVisitor(camera);
1390     int slaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
1391     if (stage->type == "display")
1392         info->addCamera( stage->type, camera, slaveIndex, true );
1393     info->getRenderStageInfo(stage->name).slaveIndex = slaveIndex;
1394 }
1395
1396 osg::Node*
1397 FGRenderer::buildLightingSkyCloudsPass(FGRenderingPipeline::Pass* pass)
1398 {
1399     Group* group = new Group;
1400     group->addChild( _sky->getPreRoot() );
1401     group->addChild( _sky->getCloudRoot() );
1402     return group;
1403 }
1404
1405 osg::Node*
1406 FGRenderer::buildLightingLightsPass(CameraInfo* info, FGRenderingPipeline::Pass* pass)
1407 {
1408     osg::Camera* lightCam = new osg::Camera;
1409     StateSet* ss = lightCam->getOrCreateStateSet();
1410     ss->addUniform( _planes );
1411     ss->addUniform( info->bufferSize );
1412     lightCam->setName( "LightCamera" );
1413     lightCam->setClearMask(0);
1414     lightCam->setAllowEventFocus(false);
1415     lightCam->setReferenceFrame(osg::Transform::RELATIVE_RF);
1416     lightCam->setRenderOrder(osg::Camera::NESTED_RENDER,pass->orderNum);
1417     lightCam->setViewMatrix(osg::Matrix::identity());
1418     lightCam->setProjectionMatrix(osg::Matrix::identity());
1419     lightCam->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1420     lightCam->setCullMask( simgear::MODELLIGHT_BIT );
1421     lightCam->setInheritanceMask( osg::CullSettings::ALL_VARIABLES & ~osg::CullSettings::CULL_MASK );
1422     lightCam->addChild( mDeferredRealRoot.get() );
1423
1424     return lightCam;
1425 }
1426
1427 osg::Node*
1428 FGRenderer::buildPass(CameraInfo* info, FGRenderingPipeline::Pass* pass)
1429 {
1430     if (!pass->valid())
1431         return 0;
1432
1433     ref_ptr<Node> node;
1434     if (pass->type == "sky-clouds")
1435         node = buildLightingSkyCloudsPass(pass);
1436     else if (pass->type == "fullscreen")
1437         node = buildDeferredFullscreenCamera(info, pass);
1438     else if (pass->type == "lights")
1439         node = buildLightingLightsPass(info, pass);
1440     else
1441         throw sg_exception("Pass type is not supported");
1442
1443     return node.release();
1444 }
1445
1446 void
1447 FGRenderer::buildBuffers(FGRenderingPipeline* rpipe, CameraInfo* info)
1448 {
1449     for (size_t i = 0; i < rpipe->buffers.size(); ++i) {
1450         osg::ref_ptr<FGRenderingPipeline::Buffer> buffer = rpipe->buffers[i];
1451         if (buffer->valid()) {
1452             bool fullscreen = buffer->width == -1 && buffer->height == -1;
1453             info->addBuffer(buffer->name, buildDeferredBuffer( buffer->internalFormat,
1454                                                                 buffer->sourceFormat,
1455                                                                 buffer->sourceType,
1456                                                                 buffer->wrapMode,
1457                                                                 buffer->shadowComparison),
1458                             fullscreen ? buffer->scaleFactor : 0.0f);
1459             if (!fullscreen) {
1460                 info->getBuffer(buffer->name)->setTextureSize(buffer->width, buffer->height);
1461             }
1462         }
1463     }
1464 }
1465
1466 CameraInfo* FGRenderer::buildCameraFromRenderingPipeline(FGRenderingPipeline* rpipe, CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
1467                                     const osg::Matrix& view, const osg::Matrix& projection, osg::GraphicsContext* gc)
1468 {
1469     CameraInfo* info = new CameraInfo(flags);
1470     buildBuffers(rpipe, info);
1471
1472     for (size_t i = 0; i < rpipe->stages.size(); ++i) {
1473         osg::ref_ptr<FGRenderingPipeline::Stage> stage = rpipe->stages[i];
1474         buildStage(info, stage, cgroup, camera, gc);
1475     }
1476
1477     cgroup->addCamera(info);
1478
1479     return info;
1480 }
1481
1482 void
1483 FGRenderer::setupView( void )
1484 {
1485     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1486     osg::initNotifyLevel();
1487
1488     // The number of polygon-offset "units" to place between layers.  In
1489     // principle, one is supposed to be enough.  In practice, I find that
1490     // my hardware/driver requires many more.
1491     osg::PolygonOffset::setUnitsMultiplier(1);
1492     osg::PolygonOffset::setFactorMultiplier(1);
1493
1494     // Go full screen if requested ...
1495     if ( fgGetBool("/sim/startup/fullscreen") )
1496         fgOSFullScreen();
1497
1498 // build the sky
1499     // The sun and moon diameters are scaled down numbers of the
1500     // actual diameters. This was needed to fit both the sun and the
1501     // moon within the distance to the far clip plane.
1502     // Moon diameter:    3,476 kilometers
1503     // Sun diameter: 1,390,000 kilometers
1504     _sky->build( 80000.0, 80000.0,
1505                   463.3, 361.8,
1506                   *globals->get_ephem(),
1507                   fgGetNode("/environment", true));
1508
1509     viewer->getCamera()
1510         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1511
1512     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
1513
1514     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
1515
1516     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
1517     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1518
1519     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
1520     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
1521     stateSet->setAttribute(new osg::BlendFunc);
1522     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
1523
1524     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
1525
1526     // this will be set below
1527     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
1528
1529     osg::Material* material = new osg::Material;
1530     stateSet->setAttribute(material);
1531
1532     stateSet->setTextureAttribute(0, new osg::TexEnv);
1533     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
1534
1535     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
1536     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
1537     stateSet->setAttribute(hint);
1538     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
1539     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
1540     stateSet->setAttribute(hint);
1541     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
1542     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
1543     stateSet->setAttribute(hint);
1544     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
1545     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
1546     stateSet->setAttribute(hint);
1547     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
1548     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
1549     stateSet->setAttribute(hint);
1550
1551     osg::Group* sceneGroup = new osg::Group;
1552     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
1553     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
1554
1555     //sceneGroup->addChild(thesky->getCloudRoot());
1556
1557     stateSet = sceneGroup->getOrCreateStateSet();
1558     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
1559
1560     // need to update the light on every frame
1561     // OSG LightSource objects are rather confusing. OSG only supports
1562     // the 10 lights specified by OpenGL itself; if more than one
1563     // LightSource in the scene graph have the same light number, it's
1564     // indeterminate which values will be used to render geometry that
1565     // has that light number enabled. Also, adding children to a
1566     // LightSource is just a shortcut for setting up a state set that
1567     // has the corresponding OpenGL light enabled: a LightSource will
1568     // affect geometry anywhere in the scene graph that has its light
1569     // number enabled in a state set.
1570     LightSource* lightSource = new LightSource;
1571     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
1572     // relative because of CameraView being just a clever transform node
1573     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
1574     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
1575     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
1576     mRealRoot->addChild(lightSource);
1577     // we need a white diffuse light for the phase of the moon
1578     osg::LightSource* sunLight = new osg::LightSource;
1579     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
1580     sunLight->getLight()->setLightNum(1);
1581     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
1582     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
1583     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
1584
1585     // Hang a StateSet above the sky subgraph in order to turn off
1586     // light 0
1587     Group* skyGroup = new Group;
1588     StateSet* skySS = skyGroup->getOrCreateStateSet();
1589     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
1590     skyGroup->addChild(_sky->getPreRoot());
1591     sunLight->addChild(skyGroup);
1592     mRoot->addChild(sceneGroup);
1593     if ( _classicalRenderer )
1594         mRoot->addChild(sunLight);
1595
1596     // Clouds are added to the scene graph later
1597     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
1598     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
1599     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
1600     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
1601
1602     // enable disable specular highlights.
1603     // is the place where we might plug in an other fragment shader ...
1604     osg::LightModel* lightModel = new osg::LightModel;
1605     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
1606     stateSet->setAttribute(lightModel);
1607
1608     // switch to enable wireframe
1609     osg::PolygonMode* polygonMode = new osg::PolygonMode;
1610     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
1611     stateSet->setAttributeAndModes(polygonMode);
1612
1613     // scene fog handling
1614     osg::Fog* fog = new osg::Fog;
1615     fog->setUpdateCallback(new FGFogUpdateCallback);
1616     stateSet->setAttributeAndModes(fog);
1617     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
1618
1619     // plug in the GUI
1620     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
1621     if (guiCamera) {
1622
1623         osg::Geode* geode = new osg::Geode;
1624         geode->addDrawable(new SGPuDrawable);
1625         geode->addDrawable(new SGHUDDrawable);
1626         guiCamera->addChild(geode);
1627
1628         panelSwitch = new osg::Switch;
1629         osg::StateSet* stateSet = panelSwitch->getOrCreateStateSet();
1630         stateSet->setRenderBinDetails(1000, "RenderBin");
1631
1632         // speed optimization?
1633         stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
1634         stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
1635         stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
1636         stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
1637         stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1638
1639
1640         panelSwitch->setUpdateCallback(new FGPanelSwitchCallback);
1641         panelChanged();
1642
1643         guiCamera->addChild(panelSwitch.get());
1644     }
1645
1646     osg::Switch* sw = new osg::Switch;
1647     sw->setUpdateCallback(new FGScenerySwitchCallback);
1648     sw->addChild(mRoot.get());
1649     mRealRoot->addChild(sw);
1650     // The clouds are attached directly to the scene graph root
1651     // because, in theory, they don't want the same default state set
1652     // as the rest of the scene. This may not be true in practice.
1653         if ( _classicalRenderer ) {
1654                 mRealRoot->addChild(_sky->getCloudRoot());
1655                 mRealRoot->addChild(FGCreateRedoutNode());
1656         }
1657     // Attach empty program to the scene root so that shader programs
1658     // don't leak into state sets (effects) that shouldn't have one.
1659     stateSet = mRealRoot->getOrCreateStateSet();
1660     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
1661
1662         mDeferredRealRoot->addChild( mRealRoot.get() );
1663 }
1664
1665 void FGRenderer::panelChanged()
1666 {
1667     if (!panelSwitch) {
1668         return;
1669     }
1670
1671     osg::Node* n = FGPanelNode::createNode(globals->get_current_panel());
1672     if (panelSwitch->getNumChildren()) {
1673         panelSwitch->setChild(0, n);
1674     } else {
1675         panelSwitch->addChild(n);
1676     }
1677 }
1678
1679 // Update all Visuals (redraws anything graphics related)
1680 void
1681 FGRenderer::update( ) {
1682     if (!(_scenery_loaded->getBoolValue() ||
1683            _scenery_override->getBoolValue()))
1684     {
1685         _splash_alpha->setDoubleValue(1.0);
1686         return;
1687     }
1688     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1689
1690     if (_splash_alpha->getDoubleValue()>0.0)
1691     {
1692         // Fade out the splash screen
1693         const double fade_time = 0.5;
1694         const double fade_steps_per_sec = 10;
1695         double delay_time = SGMiscd::min(fade_time/fade_steps_per_sec,
1696                                          (SGTimeStamp::now() - _splash_time).toSecs());
1697         _splash_time = SGTimeStamp::now();
1698         double sAlpha = _splash_alpha->getDoubleValue();
1699         sAlpha -= SGMiscd::max(0.0,delay_time/fade_time);
1700         FGScenerySwitchCallback::scenery_enabled = (sAlpha<1.0);
1701         _splash_alpha->setDoubleValue((sAlpha < 0) ? 0.0 : sAlpha);
1702     }
1703
1704     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
1705         if (!_classicalRenderer ) {
1706                 _ambientFactor->set( toOsg(l->scene_ambient()) );
1707                 _sunDiffuse->set( toOsg(l->scene_diffuse()) );
1708                 _sunSpecular->set( toOsg(l->scene_specular()) );
1709                 _sunDirection->set( osg::Vec3f(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]) );
1710         }
1711
1712     // update fog params
1713     double actual_visibility;
1714     if (_cloud_status->getBoolValue()) {
1715         actual_visibility = _sky->get_visibility();
1716     } else {
1717         actual_visibility = _visibility_m->getDoubleValue();
1718     }
1719
1720     // idle_state is now 1000 meaning we've finished all our
1721     // initializations and are running the main loop, so this will
1722     // now work without seg faulting the system.
1723
1724     FGViewer *current__view = globals->get_current_view();
1725     // Force update of center dependent values ...
1726     current__view->set_dirty();
1727
1728     osg::Camera *camera = viewer->getCamera();
1729
1730     bool skyblend = _skyblend->getBoolValue();
1731     if ( skyblend ) {
1732
1733         if ( _textures->getBoolValue() ) {
1734             SGVec4f clearColor(l->adj_fog_color());
1735             camera->setClearColor(toOsg(clearColor));
1736         }
1737     } else {
1738         SGVec4f clearColor(l->sky_color());
1739         camera->setClearColor(toOsg(clearColor));
1740     }
1741
1742     // update fog params if visibility has changed
1743     double visibility_meters = _visibility_m->getDoubleValue();
1744     _sky->set_visibility(visibility_meters);
1745
1746     double altitude_m = _altitude_ft->getDoubleValue() * SG_FEET_TO_METER;
1747     _sky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
1748
1749     // update the sky dome
1750     if ( skyblend ) {
1751
1752         // The sun and moon distances are scaled down versions
1753         // of the actual distance to get both the moon and the sun
1754         // within the range of the far clip plane.
1755         // Moon distance:    384,467 kilometers
1756         // Sun distance: 150,000,000 kilometers
1757
1758         double sun_horiz_eff, moon_horiz_eff;
1759         if (_horizon_effect->getBoolValue()) {
1760             sun_horiz_eff
1761                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
1762                                              0.0),
1763                              0.33) / 3.0;
1764             moon_horiz_eff
1765                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
1766                                              0.0),
1767                              0.33)/3.0;
1768         } else {
1769            sun_horiz_eff = moon_horiz_eff = 1.0;
1770         }
1771
1772         SGSkyState sstate;
1773         sstate.pos       = current__view->getViewPosition();
1774         sstate.pos_geod  = current__view->getPosition();
1775         sstate.ori       = current__view->getViewOrientation();
1776         sstate.spin      = l->get_sun_rotation();
1777         sstate.gst       = globals->get_time_params()->getGst();
1778         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
1779         sstate.moon_dist = 40000.0 * moon_horiz_eff;
1780         sstate.sun_angle = l->get_sun_angle();
1781
1782         SGSkyColor scolor;
1783         scolor.sky_color   = SGVec3f(l->sky_color().data());
1784         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
1785         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
1786         scolor.cloud_color = SGVec3f(l->cloud_color().data());
1787         scolor.sun_angle   = l->get_sun_angle();
1788         scolor.moon_angle  = l->get_moon_angle();
1789
1790         double delta_time_sec = _sim_delta_sec->getDoubleValue();
1791         _sky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
1792         _sky->repaint( scolor, *globals->get_ephem() );
1793
1794             //OSGFIXME
1795 //         shadows->setupShadows(
1796 //           current__view->getLongitude_deg(),
1797 //           current__view->getLatitude_deg(),
1798 //           globals->get_time_params()->getGst(),
1799 //           globals->get_ephem()->getSunRightAscension(),
1800 //           globals->get_ephem()->getSunDeclination(),
1801 //           l->get_sun_angle());
1802
1803     }
1804
1805 //     sgEnviro.setLight(l->adj_fog_color());
1806 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
1807 //         current__view->get_world_up(),
1808 //         current__view->getLongitude_deg(),
1809 //         current__view->getLatitude_deg(),
1810 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
1811 //         delta_time_sec);
1812
1813     // OSGFIXME
1814 //     sgEnviro.drawLightning();
1815
1816 //        double current_view_origin_airspeed_horiz_kt =
1817 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
1818 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
1819 //                                * SGD_DEGREES_TO_RADIANS);
1820
1821     // OSGFIXME
1822 //     if( is_internal )
1823 //         shadows->endOfFrame();
1824
1825     // need to call the update visitor once
1826     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
1827     mUpdateVisitor->setViewData(current__view->getViewPosition(),
1828                                 current__view->getViewOrientation());
1829     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
1830     mUpdateVisitor->setLight(direction, l->scene_ambient(),
1831                              l->scene_diffuse(), l->scene_specular(),
1832                              l->adj_fog_color(),
1833                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
1834     mUpdateVisitor->setVisibility(actual_visibility);
1835     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
1836     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
1837     cullMask |= simgear::GroundLightManager::instance()
1838         ->getLightNodeMask(mUpdateVisitor.get());
1839     if (_panel_hotspots->getBoolValue())
1840         cullMask |= simgear::PICK_BIT;
1841     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
1842         if ( !_classicalRenderer ) {
1843                 _fogColor->set( toOsg( l->adj_fog_color() ) );
1844                 _fogDensity->set( float( mUpdateVisitor->getFogExp2Density() ) );
1845         }
1846 }
1847
1848 void
1849 FGRenderer::resize( int width, int height )
1850 {
1851     int curWidth = _xsize->getIntValue(),
1852         curHeight = _ysize->getIntValue();
1853     SG_LOG(SG_VIEW, SG_DEBUG, "FGRenderer::resize: new size " << width << " x " << height);
1854     if ((curHeight != height) || (curWidth != width)) {
1855     // must guard setting these, or PLIB-PUI fails with too many live interfaces
1856         _xsize->setIntValue(width);
1857         _ysize->setIntValue(height);
1858     }
1859 }
1860
1861 bool
1862 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
1863                  const osgGA::GUIEventAdapter* ea)
1864 {
1865     // wipe out the return ...
1866     pickList.clear();
1867     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
1868     Intersections intersections;
1869
1870     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
1871         return false;
1872     for (Intersections::iterator hit = intersections.begin(),
1873              e = intersections.end();
1874          hit != e;
1875          ++hit) {
1876         const osg::NodePath& np = hit->nodePath;
1877         osg::NodePath::const_reverse_iterator npi;
1878         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1879             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1880             if (!ud)
1881                 continue;
1882             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1883                 SGPickCallback* pickCallback = ud->getPickCallback(i);
1884                 if (!pickCallback)
1885                     continue;
1886                 SGSceneryPick sceneryPick;
1887                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
1888                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
1889                 sceneryPick.callback = pickCallback;
1890                 pickList.push_back(sceneryPick);
1891             }
1892         }
1893     }
1894     return !pickList.empty();
1895 }
1896
1897 void
1898 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
1899 {
1900     viewer = viewer_;
1901 }
1902
1903 void
1904 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
1905 {
1906     eventHandler = eventHandler_;
1907 }
1908
1909 void
1910 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
1911 {
1912     mRealRoot->addChild(camera);
1913 }
1914
1915 void
1916 FGRenderer::removeCamera(osg::Camera* camera)
1917 {
1918     mRealRoot->removeChild(camera);
1919 }
1920
1921 void
1922 FGRenderer::setPlanes( double zNear, double zFar )
1923 {
1924         _planes->set( osg::Vec3f( - zFar, - zFar * zNear, zFar - zNear ) );
1925 }
1926
1927 bool
1928 fgDumpSceneGraphToFile(const char* filename)
1929 {
1930     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
1931 }
1932
1933 bool
1934 fgDumpTerrainBranchToFile(const char* filename)
1935 {
1936     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
1937                                  filename );
1938 }
1939
1940 // For debugging
1941 bool
1942 fgDumpNodeToFile(osg::Node* node, const char* filename)
1943 {
1944     return osgDB::writeNodeFile(*node, filename);
1945 }
1946
1947 namespace flightgear
1948 {
1949 using namespace osg;
1950
1951 class VisibleSceneInfoVistor : public NodeVisitor, CullStack
1952 {
1953 public:
1954     VisibleSceneInfoVistor()
1955         : NodeVisitor(CULL_VISITOR, TRAVERSE_ACTIVE_CHILDREN)
1956     {
1957         setCullingMode(CullSettings::SMALL_FEATURE_CULLING
1958                        | CullSettings::VIEW_FRUSTUM_CULLING);
1959         setComputeNearFarMode(CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1960     }
1961
1962     VisibleSceneInfoVistor(const VisibleSceneInfoVistor& rhs)
1963     {
1964     }
1965
1966     META_NodeVisitor("flightgear","VisibleSceneInfoVistor")
1967
1968     typedef std::map<const std::string,int> InfoMap;
1969
1970     void getNodeInfo(Node* node)
1971     {
1972         const char* typeName = typeid(*node).name();
1973         classInfo[typeName]++;
1974         const std::string& nodeName = node->getName();
1975         if (!nodeName.empty())
1976             nodeInfo[nodeName]++;
1977     }
1978
1979     void dumpInfo()
1980     {
1981         using namespace std;
1982         typedef vector<InfoMap::iterator> FreqVector;
1983         cout << "class info:\n";
1984         FreqVector classes;
1985         for (InfoMap::iterator itr = classInfo.begin(), end = classInfo.end();
1986              itr != end;
1987              ++itr)
1988             classes.push_back(itr);
1989         sort(classes.begin(), classes.end(), freqComp);
1990         for (FreqVector::iterator itr = classes.begin(), end = classes.end();
1991              itr != end;
1992              ++itr) {
1993             cout << (*itr)->first << " " << (*itr)->second << "\n";
1994         }
1995         cout << "\nnode info:\n";
1996         FreqVector nodes;
1997         for (InfoMap::iterator itr = nodeInfo.begin(), end = nodeInfo.end();
1998              itr != end;
1999              ++itr)
2000             nodes.push_back(itr);
2001
2002         sort (nodes.begin(), nodes.end(), freqComp);
2003         for (FreqVector::iterator itr = nodes.begin(), end = nodes.end();
2004              itr != end;
2005              ++itr) {
2006             cout << (*itr)->first << " " << (*itr)->second << "\n";
2007         }
2008         cout << endl;
2009     }
2010
2011     void doTraversal(Camera* camera, Node* root, Viewport* viewport)
2012     {
2013         ref_ptr<RefMatrix> projection
2014             = createOrReuseMatrix(camera->getProjectionMatrix());
2015         ref_ptr<RefMatrix> mv = createOrReuseMatrix(camera->getViewMatrix());
2016         if (!viewport)
2017             viewport = camera->getViewport();
2018         if (viewport)
2019             pushViewport(viewport);
2020         pushProjectionMatrix(projection.get());
2021         pushModelViewMatrix(mv.get(), Transform::ABSOLUTE_RF);
2022         root->accept(*this);
2023         popModelViewMatrix();
2024         popProjectionMatrix();
2025         if (viewport)
2026             popViewport();
2027         dumpInfo();
2028     }
2029
2030     void apply(Node& node)
2031     {
2032         if (isCulled(node))
2033             return;
2034         pushCurrentMask();
2035         getNodeInfo(&node);
2036         traverse(node);
2037         popCurrentMask();
2038     }
2039     void apply(Group& node)
2040     {
2041         if (isCulled(node))
2042             return;
2043         pushCurrentMask();
2044         getNodeInfo(&node);
2045         traverse(node);
2046         popCurrentMask();
2047     }
2048
2049     void apply(Transform& node)
2050     {
2051         if (isCulled(node))
2052             return;
2053         pushCurrentMask();
2054         ref_ptr<RefMatrix> matrix = createOrReuseMatrix(*getModelViewMatrix());
2055         node.computeLocalToWorldMatrix(*matrix,this);
2056         pushModelViewMatrix(matrix.get(), node.getReferenceFrame());
2057         getNodeInfo(&node);
2058         traverse(node);
2059         popModelViewMatrix();
2060         popCurrentMask();
2061     }
2062
2063     void apply(Camera& camera)
2064     {
2065         // Save current cull settings
2066         CullSettings saved_cull_settings(*this);
2067
2068         // set cull settings from this Camera
2069         setCullSettings(camera);
2070         // inherit the settings from above
2071         inheritCullSettings(saved_cull_settings, camera.getInheritanceMask());
2072
2073         // set the cull mask.
2074         unsigned int savedTraversalMask = getTraversalMask();
2075         bool mustSetCullMask = (camera.getInheritanceMask()
2076                                 & osg::CullSettings::CULL_MASK) == 0;
2077         if (mustSetCullMask)
2078             setTraversalMask(camera.getCullMask());
2079
2080         osg::RefMatrix* projection = 0;
2081         osg::RefMatrix* modelview = 0;
2082
2083         if (camera.getReferenceFrame()==osg::Transform::RELATIVE_RF) {
2084             if (camera.getTransformOrder()==osg::Camera::POST_MULTIPLY) {
2085                 projection = createOrReuseMatrix(*getProjectionMatrix()
2086                                                  *camera.getProjectionMatrix());
2087                 modelview = createOrReuseMatrix(*getModelViewMatrix()
2088                                                 * camera.getViewMatrix());
2089             }
2090             else {              // pre multiply
2091                 projection = createOrReuseMatrix(camera.getProjectionMatrix()
2092                                                  * (*getProjectionMatrix()));
2093                 modelview = createOrReuseMatrix(camera.getViewMatrix()
2094                                                 * (*getModelViewMatrix()));
2095             }
2096         } else {
2097             // an absolute reference frame
2098             projection = createOrReuseMatrix(camera.getProjectionMatrix());
2099             modelview = createOrReuseMatrix(camera.getViewMatrix());
2100         }
2101         if (camera.getViewport())
2102             pushViewport(camera.getViewport());
2103
2104         pushProjectionMatrix(projection);
2105         pushModelViewMatrix(modelview, camera.getReferenceFrame());
2106
2107         traverse(camera);
2108
2109         // restore the previous model view matrix.
2110         popModelViewMatrix();
2111
2112         // restore the previous model view matrix.
2113         popProjectionMatrix();
2114
2115         if (camera.getViewport()) popViewport();
2116
2117         // restore the previous traversal mask settings
2118         if (mustSetCullMask)
2119             setTraversalMask(savedTraversalMask);
2120
2121         // restore the previous cull settings
2122         setCullSettings(saved_cull_settings);
2123     }
2124
2125 protected:
2126     // sort in reverse
2127     static bool freqComp(const InfoMap::iterator& lhs, const InfoMap::iterator& rhs)
2128     {
2129         return lhs->second > rhs->second;
2130     }
2131     InfoMap classInfo;
2132     InfoMap nodeInfo;
2133 };
2134
2135 bool printVisibleSceneInfo(FGRenderer* renderer)
2136 {
2137     osgViewer::Viewer* viewer = renderer->getViewer();
2138     VisibleSceneInfoVistor vsv;
2139     Viewport* vp = 0;
2140     if (!viewer->getCamera()->getViewport() && viewer->getNumSlaves() > 0) {
2141         const View::Slave& slave = viewer->getSlave(0);
2142         vp = slave._camera->getViewport();
2143     }
2144     vsv.doTraversal(viewer->getCamera(), viewer->getSceneData(), vp);
2145     return true;
2146 }
2147
2148 }
2149 // end of renderer.cxx
2150