src/Viewer/renderer.cxx

   1 // renderer.cxx -- top level sim routines
   2 //
   3 // Written by Curtis Olson, started May 1997.
   4 // This file contains parts of main.cxx prior to october 2004
   5 //
   6 // Copyright (C) 1997 - 2002  Curtis L. Olson  - http://www.flightgear.org/~curt
   7 //
   8 // This program is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU General Public License as
  10 // published by the Free Software Foundation; either version 2 of the
  11 // License, or (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful, but
  14 // WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  21
  22 #ifdef HAVE_CONFIG_H
  23 #  include <config.h>
  24 #endif
  25
  26 #ifdef HAVE_WINDOWS_H
  27 #  include <windows.h>
  28 #endif
  29
  30 #include <simgear/compiler.h>
  31
  32 #include <algorithm>
  33 #include <iostream>
  34 #include <map>
  35 #include <vector>
  36 #include <typeinfo>
  37
  38 #include <boost/foreach.hpp>
  39
  40 #include <osg/ref_ptr>
  41 #include <osg/AlphaFunc>
  42 #include <osg/BlendFunc>
  43 #include <osg/Camera>
  44 #include <osg/CullFace>
  45 #include <osg/CullStack>
  46 #include <osg/Depth>
  47 #include <osg/Fog>
  48 #include <osg/Group>
  49 #include <osg/Hint>
  50 #include <osg/Light>
  51 #include <osg/LightModel>
  52 #include <osg/LightSource>
  53 #include <osg/Material>
  54 #include <osg/Math>
  55 #include <osg/NodeCallback>
  56 #include <osg/Notify>
  57 #include <osg/PolygonMode>
  58 #include <osg/PolygonOffset>
  59 #include <osg/Program>
  60 #include <osg/Version>
  61 #include <osg/TexEnv>
  62
  63 #include <osgUtil/LineSegmentIntersector>
  64
  65 #include <osg/io_utils>
  66 #include <osgDB/WriteFile>
  67 #include <osgViewer/Renderer>
  68
  69 #include <simgear/scene/material/matlib.hxx>
  70 #include <simgear/scene/material/EffectCullVisitor.hxx>
  71 #include <simgear/scene/material/Effect.hxx>
  72 #include <simgear/scene/material/EffectGeode.hxx>
  73 #include <simgear/scene/material/EffectBuilder.hxx>
  74 #include <simgear/scene/model/animation.hxx>
  75 #include <simgear/scene/model/placement.hxx>
  76 #include <simgear/scene/sky/sky.hxx>
  77 #include <simgear/scene/util/DeletionManager.hxx>
  78 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  79 #include <simgear/scene/util/RenderConstants.hxx>
  80 #include <simgear/scene/util/SGSceneUserData.hxx>
  81 #include <simgear/scene/tgdb/GroundLightManager.hxx>
  82 #include <simgear/scene/tgdb/pt_lights.hxx>
  83 #include <simgear/scene/tgdb/userdata.hxx>
  84 #include <simgear/structure/OSGUtils.hxx>
  85 #include <simgear/props/props.hxx>
  86 #include <simgear/timing/sg_time.hxx>
  87 #include <simgear/ephemeris/ephemeris.hxx>
  88 #include <simgear/math/sg_random.h>
  89 #ifdef FG_JPEG_SERVER
  90 #include <simgear/screen/jpgfactory.hxx>
  91 #endif
  92
  93 #include <Time/light.hxx>
  94 #include <Time/light.hxx>
  95 #include <Cockpit/panel.hxx>
  96
  97 #include <Model/panelnode.hxx>
  98 #include <Model/modelmgr.hxx>
  99 #include <Model/acmodel.hxx>
 100 #include <Scenery/scenery.hxx>
 101 #include <Scenery/redout.hxx>
 102 #include <GUI/new_gui.hxx>
 103 #include <Instrumentation/HUD/HUD.hxx>
 104 #include <Environment/precipitation_mgr.hxx>
 105 #include <Environment/environment_mgr.hxx>
 106
 107 //#include <Main/main.hxx>
 108 #include "viewer.hxx"
 109 #include "viewmgr.hxx"
 110 #include "splash.hxx"
 111 #include "renderer.hxx"
 112 #include "CameraGroup.hxx"
 113 #include "FGEventHandler.hxx"
 114
 115 #include <plib/pu.h>
 116
 117 using namespace osg;
 118 using namespace simgear;
 119 using namespace flightgear;
 120
 121 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 122 public:
 123   FGHintUpdateCallback(const char* configNode) :
 124     mConfigNode(fgGetNode(configNode, true))
 125   { }
 126   virtual void operator()(osg::StateAttribute* stateAttribute,
 127                           osg::NodeVisitor*)
 128   {
 129     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 130     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 131
 132     const char* value = mConfigNode->getStringValue();
 133     if (!value)
 134       hint->setMode(GL_DONT_CARE);
 135     else if (0 == strcmp(value, "nicest"))
 136       hint->setMode(GL_NICEST);
 137     else if (0 == strcmp(value, "fastest"))
 138       hint->setMode(GL_FASTEST);
 139     else
 140       hint->setMode(GL_DONT_CARE);
 141   }
 142 private:
 143   SGPropertyNode_ptr mConfigNode;
 144 };
 145
 146
 147 class SGPuDrawable : public osg::Drawable {
 148 public:
 149   SGPuDrawable()
 150   {
 151     // Dynamic stuff, do not store geometry
 152     setUseDisplayList(false);
 153     setDataVariance(Object::DYNAMIC);
 154
 155     osg::StateSet* stateSet = getOrCreateStateSet();
 156     stateSet->setRenderBinDetails(1001, "RenderBin");
 157     // speed optimization?
 158     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 159     // We can do translucent menus, so why not. :-)
 160     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 161     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 162     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 163
 164     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 165
 166     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 167     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 168   }
 169   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 170   { drawImplementation(*renderInfo.getState()); }
 171   void drawImplementation(osg::State& state) const
 172   {
 173     state.setActiveTextureUnit(0);
 174     state.setClientActiveTextureUnit(0);
 175
 176     state.disableAllVertexArrays();
 177
 178     glPushAttrib(GL_ALL_ATTRIB_BITS);
 179     glPushClientAttrib(~0u);
 180
 181     puDisplay();
 182
 183     glPopClientAttrib();
 184     glPopAttrib();
 185   }
 186
 187   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 188   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 189
 190 private:
 191 };
 192
 193 class SGHUDDrawable : public osg::Drawable {
 194 public:
 195   SGHUDDrawable()
 196   {
 197     // Dynamic stuff, do not store geometry
 198     setUseDisplayList(false);
 199     setDataVariance(Object::DYNAMIC);
 200
 201     osg::StateSet* stateSet = getOrCreateStateSet();
 202     stateSet->setRenderBinDetails(1000, "RenderBin");
 203
 204     // speed optimization?
 205     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 206     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 207     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 208     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 209     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 210
 211     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 212   }
 213   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 214   { drawImplementation(*renderInfo.getState()); }
 215   void drawImplementation(osg::State& state) const
 216   {
 217     state.setActiveTextureUnit(0);
 218     state.setClientActiveTextureUnit(0);
 219     state.disableAllVertexArrays();
 220
 221     glPushAttrib(GL_ALL_ATTRIB_BITS);
 222     glPushClientAttrib(~0u);
 223
 224     HUD *hud = static_cast<HUD*>(globals->get_subsystem("hud"));
 225     hud->draw(state);
 226
 227     glPopClientAttrib();
 228     glPopAttrib();
 229   }
 230
 231   virtual osg::Object* cloneType() const { return new SGHUDDrawable; }
 232   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDDrawable; }
 233
 234 private:
 235 };
 236
 237 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 238 public:
 239
 240   /**
 241    * @param isSun true if the light is the actual sun i.e., for
 242    * illuminating the moon.
 243    */
 244   FGLightSourceUpdateCallback(bool isSun = false) : _isSun(isSun) {}
 245   FGLightSourceUpdateCallback(const FGLightSourceUpdateCallback& nc,
 246                               const CopyOp& op)
 247     : NodeCallback(nc, op), _isSun(nc._isSun)
 248   {}
 249   META_Object(flightgear,FGLightSourceUpdateCallback);
 250
 251   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 252   {
 253     assert(dynamic_cast<osg::LightSource*>(node));
 254     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 255     osg::Light* light = lightSource->getLight();
 256
 257     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 258     if (_isSun) {
 259       light->setAmbient(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 260       light->setDiffuse(Vec4(1.0f, 1.0f, 1.0f, 1.0f));
 261       light->setSpecular(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 262     } else {
 263       light->setAmbient(toOsg(l->scene_ambient()));
 264       light->setDiffuse(toOsg(l->scene_diffuse()));
 265       light->setSpecular(toOsg(l->scene_specular()));
 266     }
 267     osg::Vec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 268     light->setPosition(position);
 269
 270     traverse(node, nv);
 271   }
 272 private:
 273   const bool _isSun;
 274 };
 275
 276 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 277 public:
 278   FGWireFrameModeUpdateCallback() :
 279     mWireframe(fgGetNode("/sim/rendering/wireframe", true))
 280   { }
 281   virtual void operator()(osg::StateAttribute* stateAttribute,
 282                           osg::NodeVisitor*)
 283   {
 284     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 285     osg::PolygonMode* polygonMode;
 286     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 287
 288     if (mWireframe->getBoolValue())
 289       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 290                            osg::PolygonMode::LINE);
 291     else
 292       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 293                            osg::PolygonMode::FILL);
 294   }
 295 private:
 296   SGPropertyNode_ptr mWireframe;
 297 };
 298
 299 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 300 public:
 301   FGLightModelUpdateCallback() :
 302     mHighlights(fgGetNode("/sim/rendering/specular-highlight", true))
 303   { }
 304   virtual void operator()(osg::StateAttribute* stateAttribute,
 305                           osg::NodeVisitor*)
 306   {
 307     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 308     osg::LightModel* lightModel;
 309     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 310
 311 #if 0
 312     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 313     lightModel->setAmbientIntensity(toOsg(l->scene_ambient());
 314 #else
 315     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 316 #endif
 317     lightModel->setTwoSided(true);
 318     lightModel->setLocalViewer(false);
 319
 320     if (mHighlights->getBoolValue()) {
 321       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 322     } else {
 323       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 324     }
 325   }
 326 private:
 327   SGPropertyNode_ptr mHighlights;
 328 };
 329
 330 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 331 public:
 332   FGFogEnableUpdateCallback() :
 333     mFogEnabled(fgGetNode("/sim/rendering/fog", true))
 334   { }
 335   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 336   {
 337     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 338       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 339     } else {
 340       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 341     }
 342   }
 343 private:
 344   SGPropertyNode_ptr mFogEnabled;
 345 };
 346
 347 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 348 public:
 349   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 350   {
 351     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 352     assert(dynamic_cast<osg::Fog*>(sa));
 353     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 354     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 355     fog->setMode(osg::Fog::EXP2);
 356     fog->setColor(toOsg(updateVisitor->getFogColor()));
 357     fog->setDensity(updateVisitor->getFogExp2Density());
 358   }
 359 };
 360
 361 // update callback for the switch node guarding that splash
 362 class FGScenerySwitchCallback : public osg::NodeCallback {
 363 public:
 364   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 365   {
 366     assert(dynamic_cast<osg::Switch*>(node));
 367     osg::Switch* sw = static_cast<osg::Switch*>(node);
 368
 369     bool enabled = scenery_enabled;
 370     sw->setValue(0, enabled);
 371     if (!enabled)
 372       return;
 373     traverse(node, nv);
 374   }
 375
 376   static bool scenery_enabled;
 377 };
 378
 379 bool FGScenerySwitchCallback::scenery_enabled = false;
 380
 381 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 382 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 383
 384 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 385 static osg::ref_ptr<osg::Group> mDeferredRealRoot = new osg::Group;
 386
 387 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 388
 389 #ifdef FG_JPEG_SERVER
 390 static void updateRenderer()
 391 {
 392     globals->get_renderer()->update();
 393 }
 394 #endif
 395
 396 FGRenderer::FGRenderer() :
 397     _sky(NULL),
 398     _ambientFactor( new osg::Uniform( "fg_SunAmbientColor", osg::Vec4f() ) ),
 399     _sunDiffuse( new osg::Uniform( "fg_SunDiffuseColor", osg::Vec4f() ) ),
 400     _sunSpecular( new osg::Uniform( "fg_SunSpecularColor", osg::Vec4f() ) ),
 401     _sunDirection( new osg::Uniform( "fg_SunDirection", osg::Vec3f() ) ),
 402     _planes( new osg::Uniform( "fg_Planes", osg::Vec3f() ) ),
 403     _fogColor( new osg::Uniform( "fg_FogColor", osg::Vec4f(1.0, 1.0, 1.0, 1.0) ) ),
 404     _fogDensity( new osg::Uniform( "fg_FogDensity", 0.0001f ) ),
 405     _shadowNumber( new osg::Uniform( "fg_ShadowNumber", (int)4 ) ),
 406     _shadowDistances( new osg::Uniform( "fg_ShadowDistances", osg::Vec4f(5.0, 50.0, 500.0, 5000.0 ) ) ),
 407     _depthInColor( new osg::Uniform( "fg_DepthInColor", false ) )
 408 {
 409 #ifdef FG_JPEG_SERVER
 410    jpgRenderFrame = updateRenderer;
 411 #endif
 412    eventHandler = new FGEventHandler;
 413
 414    _numCascades = 4;
 415    _cascadeFar[0] = 5.f;
 416    _cascadeFar[1] = 50.f;
 417    _cascadeFar[2] = 500.f;
 418    _cascadeFar[3] = 5000.f;
 419 }
 420
 421 FGRenderer::~FGRenderer()
 422 {
 423 #ifdef FG_JPEG_SERVER
 424    jpgRenderFrame = NULL;
 425 #endif
 426     delete _sky;
 427 }
 428
 429 // Initialize various GL/view parameters
 430 // XXX This should be called "preinit" or something, as it initializes
 431 // critical parts of the scene graph in addition to the splash screen.
 432 void
 433 FGRenderer::splashinit( void ) {
 434     osgViewer::Viewer* viewer = getViewer();
 435     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 436     ref_ptr<Node> splashNode = fgCreateSplashNode();
 437     if (_classicalRenderer) {
 438         mRealRoot->addChild(splashNode.get());
 439     } else {
 440         for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
 441                 ii != CameraGroup::getDefault()->camerasEnd();
 442                 ++ii )
 443         {
 444             CameraInfo* info = ii->get();
 445             Camera* camera = info->getCamera(DISPLAY_CAMERA);
 446             if (camera == 0) continue;
 447
 448             camera->addChild(splashNode.get());
 449         }
 450     }
 451     mFrameStamp = viewer->getFrameStamp();
 452     // Scene doesn't seem to pass the frame stamp to the update
 453     // visitor automatically.
 454     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 455     viewer->setUpdateVisitor(mUpdateVisitor.get());
 456     fgSetDouble("/sim/startup/splash-alpha", 1.0);
 457 }
 458
 459 class ShadowMapSizeListener : public SGPropertyChangeListener {
 460 public:
 461     virtual void valueChanged(SGPropertyNode* node) {
 462         globals->get_renderer()->updateShadowMapSize(node->getIntValue());
 463     }
 464 };
 465
 466 class ShadowEnabledListener : public SGPropertyChangeListener {
 467 public:
 468     virtual void valueChanged(SGPropertyNode* node) {
 469         globals->get_renderer()->enableShadows(node->getBoolValue());
 470     }
 471 };
 472
 473 class ShadowNumListener : public SGPropertyChangeListener {
 474 public:
 475     virtual void valueChanged(SGPropertyNode* node) {
 476         globals->get_renderer()->updateCascadeNumber(node->getIntValue());
 477     }
 478 };
 479
 480 class ShadowRangeListener : public SGPropertyChangeListener {
 481 public:
 482     virtual void valueChanged(SGPropertyNode* node) {
 483         globals->get_renderer()->updateCascadeFar(node->getIndex(), node->getFloatValue());
 484     }
 485 };
 486
 487 void
 488 FGRenderer::init( void )
 489 {
 490     sgUserDataInit( globals->get_props() );
 491
 492     _classicalRenderer = !fgGetBool("/sim/rendering/rembrandt/enabled", false);
 493     _shadowMapSize    = fgGetInt( "/sim/rendering/shadows/map-size", 4096 );
 494     fgAddChangeListener( new ShadowMapSizeListener, "/sim/rendering/shadows/map-size" );
 495     fgAddChangeListener( new ShadowEnabledListener, "/sim/rendering/shadows/enabled" );
 496     ShadowRangeListener* srl = new ShadowRangeListener;
 497     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[0]");
 498     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[1]");
 499     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[2]");
 500     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[3]");
 501     fgAddChangeListener(new ShadowNumListener, "/sim/rendering/shadows/num-cascades");
 502     _numCascades = fgGetInt("/sim/rendering/shadows/num-cascades", 4);
 503     _cascadeFar[0] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[0]", 5.0f);
 504     _cascadeFar[1] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[1]", 50.0f);
 505     _cascadeFar[2] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[2]", 500.0f);
 506     _cascadeFar[3] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[3]", 5000.0f);
 507     updateCascadeNumber(_numCascades);
 508     updateCascadeFar(0, _cascadeFar[0]);
 509     updateCascadeFar(1, _cascadeFar[1]);
 510     updateCascadeFar(2, _cascadeFar[2]);
 511     updateCascadeFar(3, _cascadeFar[3]);
 512     _useColorForDepth = fgGetBool( "/sim/rendering/rembrandt/use-color-for-depth", false );
 513     _depthInColor->set( _useColorForDepth );
 514
 515     _renderer         = fgGetString("/sim/rendering/rembrandt/renderer", "default-pipeline");
 516     if (!_classicalRenderer)
 517         _pipeline = makeRenderingPipeline(_renderer, 0);
 518     _scenery_loaded   = fgGetNode("/sim/sceneryloaded", true);
 519     _panel_hotspots   = fgGetNode("/sim/panel-hotspots", true);
 520     _virtual_cockpit  = fgGetNode("/sim/virtual-cockpit", true);
 521
 522     _sim_delta_sec = fgGetNode("/sim/time/delta-sec", true);
 523
 524     _xsize         = fgGetNode("/sim/startup/xsize", true);
 525     _ysize         = fgGetNode("/sim/startup/ysize", true);
 526     _splash_alpha  = fgGetNode("/sim/startup/splash-alpha", true);
 527
 528     _skyblend             = fgGetNode("/sim/rendering/skyblend", true);
 529     _point_sprites        = fgGetNode("/sim/rendering/point-sprites", true);
 530     _enhanced_lighting    = fgGetNode("/sim/rendering/enhanced-lighting", true);
 531     _distance_attenuation = fgGetNode("/sim/rendering/distance-attenuation", true);
 532     _horizon_effect       = fgGetNode("/sim/rendering/horizon-effect", true);
 533     _textures             = fgGetNode("/sim/rendering/textures", true);
 534
 535     _altitude_ft = fgGetNode("/position/altitude-ft", true);
 536
 537     _cloud_status = fgGetNode("/environment/clouds/status", true);
 538     _visibility_m = fgGetNode("/environment/visibility-m", true);
 539
 540     bool use_point_sprites = _point_sprites->getBoolValue();
 541     bool enhanced_lighting = _enhanced_lighting->getBoolValue();
 542     bool distance_attenuation = _distance_attenuation->getBoolValue();
 543
 544     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 545                                   distance_attenuation );
 546
 547     if (const char* tc = fgGetString("/sim/rendering/texture-compression", NULL)) {
 548       if (strcmp(tc, "false") == 0 || strcmp(tc, "off") == 0 ||
 549           strcmp(tc, "0") == 0 || strcmp(tc, "no") == 0 ||
 550           strcmp(tc, "none") == 0) {
 551         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::DoNotUseCompression);
 552       } else if (strcmp(tc, "arb") == 0) {
 553         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseARBCompression);
 554       } else if (strcmp(tc, "dxt1") == 0) {
 555         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT1Compression);
 556       } else if (strcmp(tc, "dxt3") == 0) {
 557         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT3Compression);
 558       } else if (strcmp(tc, "dxt5") == 0) {
 559         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT5Compression);
 560       } else {
 561         SG_LOG(SG_VIEW, SG_WARN, "Unknown texture compression setting!");
 562       }
 563     }
 564
 565 // create sky, but can't build until setupView, since we depend
 566 // on other subsystems to be inited, eg Ephemeris
 567     _sky = new SGSky;
 568
 569     SGPath texture_path(globals->get_fg_root());
 570     texture_path.append("Textures");
 571     texture_path.append("Sky");
 572     for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
 573         SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
 574         _sky->add_cloud_layer(layer);
 575     }
 576
 577     _sky->texture_path( texture_path.str() );
 578
 579     if (!_classicalRenderer) {
 580         eventHandler->setChangeStatsCameraRenderOrder( true );
 581         _sky->set_minimum_sky_visibility( 0.0 ); // A black sky appears for below that
 582     }
 583 }
 584
 585 void installCullVisitor(Camera* camera)
 586 {
 587     osgViewer::Renderer* renderer
 588         = static_cast<osgViewer::Renderer*>(camera->getRenderer());
 589     for (int i = 0; i < 2; ++i) {
 590         osgUtil::SceneView* sceneView = renderer->getSceneView(i);
 591 #if SG_OSG_VERSION_LESS_THAN(3,0,0)
 592         sceneView->setCullVisitor(new simgear::EffectCullVisitor);
 593 #else
 594         osg::ref_ptr<osgUtil::CullVisitor::Identifier> identifier;
 595         identifier = sceneView->getCullVisitor()->getIdentifier();
 596         sceneView->setCullVisitor(new simgear::EffectCullVisitor);
 597         sceneView->getCullVisitor()->setIdentifier(identifier.get());
 598
 599         identifier = sceneView->getCullVisitorLeft()->getIdentifier();
 600         sceneView->setCullVisitorLeft(sceneView->getCullVisitor()->clone());
 601         sceneView->getCullVisitorLeft()->setIdentifier(identifier.get());
 602
 603         identifier = sceneView->getCullVisitorRight()->getIdentifier();
 604         sceneView->setCullVisitorRight(sceneView->getCullVisitor()->clone());
 605         sceneView->getCullVisitorRight()->setIdentifier(identifier.get());
 606 #endif
 607     }
 608 }
 609
 610 CameraInfo*
 611 FGRenderer::buildRenderingPipeline(CameraGroup* cgroup, unsigned flags, Camera* camera,
 612                                    const Matrix& view,
 613                                    const Matrix& projection,
 614                                                                    osg::GraphicsContext* gc,
 615                                    bool useMasterSceneData)
 616 {
 617         CameraInfo* info = 0;
 618         if (!_classicalRenderer && (flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0)
 619                 info = buildDeferredPipeline( cgroup, flags, camera, view, projection, gc );
 620
 621         if (info) {
 622                 return info;
 623         } else {
 624                 if ((flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0)
 625                         _classicalRenderer = true;
 626                 return buildClassicalPipeline( cgroup, flags, camera, view, projection, useMasterSceneData );
 627         }
 628 }
 629
 630 CameraInfo*
 631 FGRenderer::buildClassicalPipeline(CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
 632                                 const osg::Matrix& view,
 633                                 const osg::Matrix& projection,
 634                                 bool useMasterSceneData)
 635 {
 636     CameraInfo* info = new CameraInfo(flags);
 637     // The camera group will always update the camera
 638     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
 639
 640     Camera* farCamera = 0;
 641     if ((flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0) {
 642         farCamera = new Camera;
 643         farCamera->setAllowEventFocus(camera->getAllowEventFocus());
 644         farCamera->setGraphicsContext(camera->getGraphicsContext());
 645         farCamera->setCullingMode(camera->getCullingMode());
 646         farCamera->setInheritanceMask(camera->getInheritanceMask());
 647         farCamera->setReferenceFrame(Transform::ABSOLUTE_RF);
 648         // Each camera's viewport is written when the window is
 649         // resized; if the the viewport isn't copied here, it gets updated
 650         // twice and ends up with the wrong value.
 651         farCamera->setViewport(simgear::clone(camera->getViewport()));
 652         farCamera->setDrawBuffer(camera->getDrawBuffer());
 653         farCamera->setReadBuffer(camera->getReadBuffer());
 654         farCamera->setRenderTargetImplementation(
 655             camera->getRenderTargetImplementation());
 656         const Camera::BufferAttachmentMap& bufferMap
 657             = camera->getBufferAttachmentMap();
 658         if (bufferMap.count(Camera::COLOR_BUFFER) != 0) {
 659             farCamera->attach(
 660                 Camera::COLOR_BUFFER,
 661                 bufferMap.find(Camera::COLOR_BUFFER)->second._texture.get());
 662         }
 663         cgroup->getViewer()->addSlave(farCamera, projection, view, useMasterSceneData);
 664         installCullVisitor(farCamera);
 665                 int farSlaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
 666                 info->addCamera( FAR_CAMERA, farCamera, farSlaveIndex );
 667         farCamera->setRenderOrder(Camera::POST_RENDER, farSlaveIndex);
 668         camera->setCullMask(camera->getCullMask() & ~simgear::BACKGROUND_BIT);
 669         camera->setClearMask(GL_DEPTH_BUFFER_BIT);
 670     }
 671     cgroup->getViewer()->addSlave(camera, projection, view, useMasterSceneData);
 672     installCullVisitor(camera);
 673     int slaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
 674     info->addCamera( MAIN_CAMERA, camera, slaveIndex );
 675     camera->setRenderOrder(Camera::POST_RENDER, slaveIndex);
 676     cgroup->addCamera(info);
 677     return info;
 678 }
 679
 680 class FGDeferredRenderingCameraCullCallback : public osg::NodeCallback {
 681 public:
 682     FGDeferredRenderingCameraCullCallback( const std::string& k, CameraInfo* i, bool nd = false ) : kind( k ), info( i ), needsDuDv(nd) {}
 683     virtual void operator()( osg::Node *n, osg::NodeVisitor *nv) {
 684         simgear::EffectCullVisitor* cv = dynamic_cast<simgear::EffectCullVisitor*>(nv);
 685         osg::Camera* camera = static_cast<osg::Camera*>(n);
 686
 687         cv->clearBufferList();
 688         for (RenderBufferMap::iterator ii = info->buffers.begin(); ii != info->buffers.end(); ++ii) {
 689             cv->addBuffer(ii->first, ii->second.texture);
 690         }
 691
 692         if ( !info->getRenderStageInfo(kind).fullscreen )
 693             info->setMatrices( camera );
 694
 695         if (needsDuDv) {
 696             osg::Matrix projInverse;
 697             info->projInverse->get( projInverse );
 698
 699             osg::Vec4 p0 = osg::Vec4( -1.0, -1.0, 0.0, 1.0 ) * projInverse;
 700             info->du->set( osg::Vec4(  1.0, -1.0, 0.0, 1.0 ) * projInverse - p0 );
 701             info->dv->set( osg::Vec4( -1.0,  1.0, 0.0, 1.0 ) * projInverse - p0 );
 702         }
 703
 704         cv->traverse( *camera );
 705
 706         if ( kind == GEOMETRY_CAMERA ) {
 707             // Remove transparent bins. They will be renderer in the additional light stage (side effect)
 708             osgUtil::RenderStage* renderStage = cv->getRenderStage();
 709             osgUtil::RenderBin::RenderBinList& rbl = renderStage->getRenderBinList();
 710             for (osgUtil::RenderBin::RenderBinList::iterator rbi = rbl.begin(); rbi != rbl.end(); ) {
 711                 if (rbi->second->getSortMode() == osgUtil::RenderBin::SORT_BACK_TO_FRONT) {
 712                     rbl.erase( rbi++ );
 713                 } else {
 714                     ++rbi;
 715                 }
 716             }
 717         } else if ( kind == LIGHTING_CAMERA ) {
 718             osg::ref_ptr<osg::Camera> mainShadowCamera = info->getCamera( SHADOW_CAMERA );
 719             if (mainShadowCamera.valid()) {
 720                 osg::Switch* grp = mainShadowCamera->getChild(0)->asSwitch();
 721                 for (int i = 0; i < 4; ++i ) {
 722                     if (!grp->getValue(i))
 723                         continue;
 724
 725                     osg::Camera* cascadeCam = static_cast<osg::Camera*>( grp->getChild(i) );
 726                     osg::Matrixf shadowMatrix = camera->getInverseViewMatrix() *
 727                                                 cascadeCam->getViewMatrix() *
 728                                                 cascadeCam->getProjectionMatrix() *
 729                                                 osg::Matrix::translate(1.0, 1.0, 1.0) *
 730                                                 osg::Matrix::scale(0.5f, 0.5f, 0.5f);
 731
 732                     info->shadowMatrix[i]->set( shadowMatrix );
 733                 }
 734             }
 735         }
 736     }
 737
 738 private:
 739     std::string kind;
 740     CameraInfo* info;
 741     bool needsDuDv;
 742 };
 743
 744 osg::Texture2D* buildDeferredBuffer(GLint internalFormat, GLenum sourceFormat, GLenum sourceType, GLenum wrapMode, bool shadowComparison = false)
 745 {
 746     osg::Texture2D* tex = new osg::Texture2D;
 747     tex->setResizeNonPowerOfTwoHint( false );
 748     tex->setInternalFormat( internalFormat );
 749     tex->setShadowComparison(shadowComparison);
 750     if (shadowComparison) {
 751         tex->setShadowTextureMode(osg::Texture2D::LUMINANCE);
 752         tex->setBorderColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
 753     }
 754     tex->setSourceFormat(sourceFormat);
 755     tex->setSourceType(sourceType);
 756     tex->setFilter( osg::Texture2D::MIN_FILTER, osg::Texture2D::LINEAR );
 757     tex->setFilter( osg::Texture2D::MAG_FILTER, osg::Texture2D::LINEAR );
 758     tex->setWrap( osg::Texture::WRAP_S, (osg::Texture::WrapMode)wrapMode );
 759     tex->setWrap( osg::Texture::WRAP_T, (osg::Texture::WrapMode)wrapMode );
 760         return tex;
 761 }
 762
 763 void attachBufferToCamera( CameraInfo* info, osg::Camera* camera, osg::Camera::BufferComponent c, const std::string& ck, const std::string& bk )
 764 {
 765     camera->attach( c, info->getBuffer(bk) );
 766     info->getRenderStageInfo(ck).buffers.insert( std::make_pair( c, bk ) );
 767 }
 768
 769 void buildAttachments(CameraInfo* info, osg::Camera* camera, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments) {
 770     BOOST_FOREACH(ref_ptr<FGRenderingPipeline::Attachment> attachment, attachments) {
 771         if (attachment->valid())
 772             attachBufferToCamera( info, camera, attachment->component, name, attachment->buffer );
 773     }
 774 }
 775
 776 osg::Camera* FGRenderer::buildDeferredGeometryCamera( CameraInfo* info, osg::GraphicsContext* gc, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments )
 777 {
 778     osg::Camera* camera = new osg::Camera;
 779     info->addCamera(name, camera );
 780
 781     camera->setCullMask( ~simgear::MODELLIGHT_BIT );
 782     camera->setName( "GeometryC" );
 783     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
 784     camera->setGraphicsContext( gc );
 785     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( name, info ) );
 786     camera->setClearMask( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
 787     camera->setClearColor( osg::Vec4( 0., 0., 0., 0. ) );
 788     camera->setClearDepth( 1.0 );
 789     camera->setColorMask(true, true, true, true);
 790     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
 791     camera->setRenderOrder(osg::Camera::NESTED_RENDER, 0);
 792     camera->setViewport( new osg::Viewport );
 793     buildAttachments(info, camera, name, attachments);
 794     camera->setDrawBuffer(GL_FRONT);
 795     camera->setReadBuffer(GL_FRONT);
 796
 797     osg::StateSet* ss = camera->getOrCreateStateSet();
 798     ss->addUniform( _depthInColor );
 799
 800     camera->addChild( mDeferredRealRoot.get() );
 801
 802     return camera;
 803 }
 804
 805 static void setShadowCascadeStateSet( osg::Camera* cam ) {
 806     osg::StateSet* ss = cam->getOrCreateStateSet();
 807     ss->setAttribute( new osg::PolygonOffset( 1.1f, 5.0f ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 808     ss->setMode( GL_POLYGON_OFFSET_FILL, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 809     ss->setRenderBinDetails( 0, "RenderBin", osg::StateSet::OVERRIDE_RENDERBIN_DETAILS );
 810     ss->setAttributeAndModes( new osg::AlphaFunc( osg::AlphaFunc::GREATER, 0.05 ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 811     ss->setAttributeAndModes( new osg::ColorMask( false, false, false, false ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 812     ss->setAttributeAndModes( new osg::CullFace( osg::CullFace::FRONT ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 813     osg::Program* program = new osg::Program;
 814     ss->setAttribute( program, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON );
 815     ss->setMode( GL_LIGHTING, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 816     ss->setMode( GL_BLEND, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 817     //ss->setTextureMode( 0, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON );
 818     ss->setTextureMode( 0, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 819     ss->setTextureMode( 1, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 820     ss->setTextureMode( 1, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 821     ss->setTextureMode( 2, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 822     ss->setTextureMode( 2, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 823 }
 824
 825 static osg::Camera* createShadowCascadeCamera( int no, int cascadeSize ) {
 826     osg::Camera* cascadeCam = new osg::Camera;
 827     setShadowCascadeStateSet( cascadeCam );
 828
 829     std::ostringstream oss;
 830     oss << "CascadeCamera" << (no + 1);
 831     cascadeCam->setName( oss.str() );
 832     cascadeCam->setClearMask(0);
 833     cascadeCam->setCullMask( simgear::CASTSHADOW_BIT );
 834     cascadeCam->setCullingMode( cascadeCam->getCullingMode() | osg::CullSettings::SMALL_FEATURE_CULLING );
 835     cascadeCam->setAllowEventFocus(false);
 836     cascadeCam->setReferenceFrame(osg::Transform::ABSOLUTE_RF_INHERIT_VIEWPOINT);
 837     cascadeCam->setRenderOrder(osg::Camera::NESTED_RENDER);
 838     cascadeCam->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 839     cascadeCam->setViewport( int( no / 2 ) * cascadeSize, (no & 1) * cascadeSize, cascadeSize, cascadeSize );
 840     return cascadeCam;
 841 }
 842
 843 osg::Camera* FGRenderer::buildDeferredShadowCamera( CameraInfo* info, osg::GraphicsContext* gc, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments )
 844 {
 845     osg::Camera* mainShadowCamera = new osg::Camera;
 846     info->addCamera(name, mainShadowCamera, 0.0f );
 847
 848     mainShadowCamera->setName( "ShadowC" );
 849     mainShadowCamera->setClearMask( GL_DEPTH_BUFFER_BIT );
 850     mainShadowCamera->setClearDepth( 1.0 );
 851     mainShadowCamera->setAllowEventFocus(false);
 852     mainShadowCamera->setGraphicsContext(gc);
 853     mainShadowCamera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
 854     buildAttachments(info, mainShadowCamera, name, attachments);
 855     mainShadowCamera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
 856     mainShadowCamera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
 857     mainShadowCamera->setProjectionMatrix(osg::Matrix::identity());
 858     mainShadowCamera->setCullingMode( osg::CullSettings::NO_CULLING );
 859     mainShadowCamera->setViewport( 0, 0, _shadowMapSize, _shadowMapSize );
 860     mainShadowCamera->setDrawBuffer(GL_FRONT);
 861     mainShadowCamera->setReadBuffer(GL_FRONT);
 862     mainShadowCamera->setRenderOrder(Camera::NESTED_RENDER, 1);
 863
 864     osg::Switch* shadowSwitch = new osg::Switch;
 865     mainShadowCamera->addChild( shadowSwitch );
 866
 867     for (int i = 0; i < 4; ++i ) {
 868         osg::Camera* cascadeCam = createShadowCascadeCamera( i, _shadowMapSize/2 );
 869         cascadeCam->addChild( mDeferredRealRoot.get() );
 870         shadowSwitch->addChild( cascadeCam );
 871     }
 872     if (fgGetBool("/sim/rendering/shadows/enabled", true))
 873         shadowSwitch->setAllChildrenOn();
 874     else
 875         shadowSwitch->setAllChildrenOff();
 876
 877     return mainShadowCamera;
 878 }
 879
 880 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)
 881 {
 882     osg::Camera* cascade = static_cast<osg::Camera*>( grp->getChild(idx) );
 883     osg::Matrixd &viewMatrix = cascade->getViewMatrix();
 884     osg::Matrixd &projectionMatrix = cascade->getProjectionMatrix();
 885
 886     osg::BoundingSphere bs;
 887     bs.expandBy(osg::Vec3(left,bottom,-zNear) * f1);
 888     bs.expandBy(osg::Vec3(right,top,-zNear) * f2);
 889     bs.expandBy(osg::Vec3(left,bottom,-zNear) * f2);
 890     bs.expandBy(osg::Vec3(right,top,-zNear) * f1);
 891
 892     osg::Vec4 aim = osg::Vec4(bs.center(), 1.0) * camera->getInverseViewMatrix();
 893
 894     projectionMatrix.makeOrtho( -bs.radius(), bs.radius(), -bs.radius(), bs.radius(), 1., 15000.0 );
 895     osg::Vec3 position( aim.x(), aim.y(), aim.z() );
 896     viewMatrix.makeLookAt( position + (getSunDirection() * 10000.0), position, position );
 897 }
 898
 899 osg::Vec3 FGRenderer::getSunDirection() const
 900 {
 901     osg::Vec3 val;
 902     _sunDirection->get( val );
 903     return val;
 904 }
 905
 906 void FGRenderer::updateShadowCamera(const CameraInfo* info, const osg::Vec3d& position)
 907 {
 908     ref_ptr<Camera> mainShadowCamera = info->getCamera( SHADOW_CAMERA );
 909     if (mainShadowCamera.valid()) {
 910         ref_ptr<Switch> shadowSwitch = mainShadowCamera->getChild( 0 )->asSwitch();
 911         osg::Vec3d up = position,
 912             dir = getSunDirection();
 913         up.normalize();
 914         dir.normalize();
 915         // cos(100 deg) == -0.17
 916         if (up * dir < -0.17 || !fgGetBool("/sim/rendering/shadows/enabled", true)) {
 917             shadowSwitch->setAllChildrenOff();
 918         } else {
 919             double left,right,bottom,top,zNear,zFar;
 920             ref_ptr<Camera> camera = info->getCamera(GEOMETRY_CAMERA);
 921             camera->getProjectionMatrix().getFrustum(left,right,bottom,top,zNear,zFar);
 922
 923             shadowSwitch->setAllChildrenOn();
 924             if (_numCascades == 1) {
 925                 osg::Camera* cascadeCam = static_cast<osg::Camera*>( shadowSwitch->getChild(0) );
 926                 cascadeCam->setViewport( 0, 0, _shadowMapSize, _shadowMapSize );
 927             } else {
 928                 for (int no = 0; no < 4; ++no) {
 929                     osg::Camera* cascadeCam = static_cast<osg::Camera*>( shadowSwitch->getChild(no) );
 930                     cascadeCam->setViewport( int( no / 2 ) * (_shadowMapSize/2), (no & 1) * (_shadowMapSize/2), (_shadowMapSize/2), (_shadowMapSize/2) );
 931                 }
 932             }
 933             updateShadowCascade(info, camera, shadowSwitch, 0, left, right, bottom, top, zNear, 1.0, _cascadeFar[0]/zNear);
 934             if (_numCascades > 1) {
 935                 shadowSwitch->setValue(1, true);
 936                 updateShadowCascade(info, camera, shadowSwitch, 1, left, right, bottom, top, zNear, _cascadeFar[0]/zNear, _cascadeFar[1]/zNear);
 937             } else {
 938                 shadowSwitch->setValue(1, false);
 939             }
 940             if (_numCascades > 2) {
 941                 shadowSwitch->setValue(2, true);
 942                 updateShadowCascade(info, camera, shadowSwitch, 2, left, right, bottom, top, zNear, _cascadeFar[1]/zNear, _cascadeFar[2]/zNear);
 943             } else {
 944                 shadowSwitch->setValue(2, false);
 945             }
 946             if (_numCascades > 3) {
 947                 shadowSwitch->setValue(3, true);
 948                 updateShadowCascade(info, camera, shadowSwitch, 3, left, right, bottom, top, zNear, _cascadeFar[2]/zNear, _cascadeFar[3]/zNear);
 949             } else {
 950                 shadowSwitch->setValue(3, false);
 951             }
 952             {
 953             osg::Matrixd &viewMatrix = mainShadowCamera->getViewMatrix();
 954
 955             osg::Vec4 aim = osg::Vec4( 0.0, 0.0, 0.0, 1.0 ) * camera->getInverseViewMatrix();
 956
 957             osg::Vec3 position( aim.x(), aim.y(), aim.z() );
 958             viewMatrix.makeLookAt( position, position + (getSunDirection() * 10000.0), position );
 959             }
 960         }
 961     }
 962 }
 963
 964 void FGRenderer::updateShadowMapSize(int mapSize)
 965 {
 966     if ( ((~( mapSize-1 )) & mapSize) != mapSize ) {
 967         SG_LOG( SG_VIEW, SG_ALERT, "Map size is not a power of two" );
 968         return;
 969     }
 970     for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
 971             ii != CameraGroup::getDefault()->camerasEnd();
 972             ++ii )
 973     {
 974         CameraInfo* info = ii->get();
 975         Camera* camera = info->getCamera(SHADOW_CAMERA);
 976         if (camera == 0) continue;
 977
 978         Texture2D* tex = info->getBuffer("shadow");
 979         if (tex == 0) continue;
 980
 981         tex->setTextureSize( mapSize, mapSize );
 982         tex->dirtyTextureObject();
 983
 984         Viewport* vp = camera->getViewport();
 985         vp->width() = mapSize;
 986         vp->height() = mapSize;
 987
 988         osgViewer::Renderer* renderer
 989             = static_cast<osgViewer::Renderer*>(camera->getRenderer());
 990         for (int i = 0; i < 2; ++i) {
 991             osgUtil::SceneView* sceneView = renderer->getSceneView(i);
 992             sceneView->getRenderStage()->setFrameBufferObject(0);
 993             sceneView->getRenderStage()->setCameraRequiresSetUp(true);
 994             if (sceneView->getRenderStageLeft()) {
 995                 sceneView->getRenderStageLeft()->setFrameBufferObject(0);
 996                 sceneView->getRenderStageLeft()->setCameraRequiresSetUp(true);
 997             }
 998             if (sceneView->getRenderStageRight()) {
 999                 sceneView->getRenderStageRight()->setFrameBufferObject(0);
1000                 sceneView->getRenderStageRight()->setCameraRequiresSetUp(true);
1001             }
1002         }
1003
1004         int cascadeSize = mapSize / 2;
1005         Group* grp = camera->getChild(0)->asGroup();
1006         for (int i = 0; i < 4; ++i ) {
1007             Camera* cascadeCam = static_cast<Camera*>( grp->getChild(i) );
1008             cascadeCam->setViewport( int( i / 2 ) * cascadeSize, (i & 1) * cascadeSize, cascadeSize, cascadeSize );
1009         }
1010
1011         _shadowMapSize = mapSize;
1012     }
1013 }
1014
1015 void FGRenderer::enableShadows(bool enabled)
1016 {
1017     for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
1018             ii != CameraGroup::getDefault()->camerasEnd();
1019             ++ii )
1020     {
1021         CameraInfo* info = ii->get();
1022         Camera* camera = info->getCamera(SHADOW_CAMERA);
1023         if (camera == 0) continue;
1024
1025         osg::Switch* shadowSwitch = camera->getChild(0)->asSwitch();
1026         if (enabled)
1027             shadowSwitch->setAllChildrenOn();
1028         else
1029             shadowSwitch->setAllChildrenOff();
1030     }
1031 }
1032
1033 void FGRenderer::updateCascadeFar(int index, float far_m)
1034 {
1035     if (index < 0 || index > 3)
1036         return;
1037     _cascadeFar[index] = far_m;
1038     _shadowDistances->set( osg::Vec4f(_cascadeFar[0], _cascadeFar[1], _cascadeFar[2], _cascadeFar[3]) );
1039 }
1040
1041 void FGRenderer::updateCascadeNumber(size_t num)
1042 {
1043     if (num < 1 || num > 4)
1044         return;
1045     _numCascades = num;
1046     _shadowNumber->set( (int)_numCascades );
1047 }
1048
1049 class DebugPassListener : public SGPropertyChangeListener {
1050 public:
1051     DebugPassListener(osg::Switch* sw, int i) : _switch(sw), _index(i) {}
1052     virtual void valueChanged(SGPropertyNode* node) {
1053         _switch->setValue(_index, node->getBoolValue());
1054     }
1055
1056 private:
1057     osg::ref_ptr<osg::Switch> _switch;
1058     int _index;
1059 };
1060
1061 osg::Camera*
1062 FGRenderer::buildDeferredLightingCamera( flightgear::CameraInfo* info, osg::GraphicsContext* gc, const FGRenderingPipeline::Stage* stage )
1063 {
1064     osg::Camera* camera = new osg::Camera;
1065     info->addCamera(stage->name, camera );
1066
1067     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( stage->name, info ) );
1068     camera->setAllowEventFocus(false);
1069     camera->setGraphicsContext(gc);
1070     camera->setViewport(new Viewport);
1071     camera->setName(stage->name+"C");
1072     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1073     camera->setRenderOrder(osg::Camera::NESTED_RENDER, stage->orderNum);
1074     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1075     camera->setViewport( new osg::Viewport );
1076     buildAttachments(info, camera, stage->name, stage->attachments);
1077     camera->setDrawBuffer(GL_FRONT);
1078     camera->setReadBuffer(GL_FRONT);
1079     camera->setClearColor( osg::Vec4( 0.5, 0.5, 0.5, 1. ) );
1080     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1081     osg::StateSet* ss = camera->getOrCreateStateSet();
1082     ss->setAttribute( new osg::Depth(osg::Depth::LESS, 0.0, 1.0, false) );
1083     ss->addUniform( _depthInColor );
1084
1085     osg::Switch* lightingGroup = new osg::Switch;
1086
1087     BOOST_FOREACH( osg::ref_ptr<FGRenderingPipeline::Pass> pass, stage->passes ) {
1088         ref_ptr<Node> node = buildPass(info, pass);
1089         if (node.valid()) {
1090             lightingGroup->addChild(node);
1091             if (!pass->debugProperty.empty()) {
1092                 lightingGroup->setValue(lightingGroup->getNumChildren()-1, fgGetBool(pass->debugProperty));
1093                 fgAddChangeListener(new DebugPassListener(lightingGroup, lightingGroup->getNumChildren()-1), pass->debugProperty);
1094             }
1095         }
1096     }
1097
1098     camera->addChild( lightingGroup );
1099
1100     return camera;
1101 }
1102
1103 CameraInfo*
1104 FGRenderer::buildDeferredPipeline(CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
1105                                     const osg::Matrix& view,
1106                                     const osg::Matrix& projection,
1107                                     osg::GraphicsContext* gc)
1108 {
1109     return buildCameraFromRenderingPipeline(_pipeline, cgroup, flags, camera, view, projection, gc);
1110 }
1111
1112 osg::Camera*
1113 FGRenderer::buildDeferredFullscreenCamera( flightgear::CameraInfo* info, const FGRenderingPipeline::Pass* pass )
1114 {
1115     osg::Camera* camera = new osg::Camera;
1116
1117     camera->setClearMask( 0 );
1118     camera->setAllowEventFocus(false);
1119     camera->setName(pass->name+"C");
1120     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1121     camera->setRenderOrder(osg::Camera::NESTED_RENDER, pass->orderNum);
1122     camera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1123     camera->setViewMatrix(osg::Matrix::identity());
1124     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1125
1126     osg::StateSet* ss = camera->getOrCreateStateSet();
1127     ss->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1128     ss->addUniform( info->projInverse );
1129     ss->addUniform( info->viewInverse );
1130     ss->addUniform( info->view );
1131     ss->addUniform( info->bufferSize );
1132     ss->addUniform( info->worldPosCart );
1133     ss->addUniform( info->worldPosGeod );
1134     ss->addUniform( info->shadowMatrix[0] );
1135     ss->addUniform( info->shadowMatrix[1] );
1136     ss->addUniform( info->shadowMatrix[2] );
1137     ss->addUniform( info->shadowMatrix[3] );
1138     ss->addUniform( _ambientFactor );
1139     ss->addUniform( _sunDiffuse );
1140     ss->addUniform( _sunSpecular );
1141     ss->addUniform( _sunDirection );
1142     ss->addUniform( _planes );
1143     ss->addUniform( _shadowNumber );
1144     ss->addUniform( _shadowDistances );
1145     ss->addUniform( _fogColor );
1146     ss->addUniform( _fogDensity );
1147
1148     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1149     g->setUseDisplayList(false);
1150     simgear::EffectGeode* eg = new simgear::EffectGeode;
1151     osg::ref_ptr<SGReaderWriterOptions> opt;
1152     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1153     opt->setPropertyNode(globals->get_props());
1154     simgear::Effect* effect = simgear::makeEffect(pass->effect, true, opt.get());
1155     if (effect) {
1156         eg->setEffect( effect );
1157     }
1158
1159     eg->setName(pass->name+"Quad");
1160     eg->setCullingActive(false);
1161     eg->addDrawable(g);
1162     camera->addChild(eg);
1163
1164     return camera;
1165 }
1166
1167 osg::Camera*
1168 FGRenderer::buildDeferredFullscreenCamera( flightgear::CameraInfo* info, osg::GraphicsContext* gc, const FGRenderingPipeline::Stage* stage )
1169 {
1170     osg::Camera* camera = buildDeferredFullscreenCamera(info, static_cast<const FGRenderingPipeline::Pass*>(stage));
1171     info->addCamera(stage->name, camera, stage->scaleFactor, true);
1172
1173     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback(stage->name, info, stage->needsDuDv) );
1174     camera->setGraphicsContext(gc);
1175     camera->setViewport(new Viewport);
1176     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1177     buildAttachments(info, camera, stage->name, stage->attachments);
1178     camera->setDrawBuffer(GL_FRONT);
1179     camera->setReadBuffer(GL_FRONT);
1180     camera->setClearColor( osg::Vec4( 1., 1., 1., 1. ) );
1181     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1182     camera->setViewMatrix(osg::Matrix::identity());
1183     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1184
1185     osg::StateSet* ss = camera->getOrCreateStateSet();
1186     if (stage->needsDuDv) {
1187         ss->addUniform( info->du );
1188         ss->addUniform( info->dv );
1189     }
1190
1191     return camera;
1192 }
1193
1194 void
1195 FGRenderer::buildDeferredDisplayCamera( osg::Camera* camera, flightgear::CameraInfo* info, const FGRenderingPipeline::Stage* stage, osg::GraphicsContext* gc )
1196 {
1197     camera->setName( "DisplayC" );
1198     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( stage->name, info ) );
1199     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
1200     camera->setAllowEventFocus(false);
1201     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1202     g->setUseDisplayList(false); //DEBUG
1203     simgear::EffectGeode* eg = new simgear::EffectGeode;
1204     osg::ref_ptr<SGReaderWriterOptions> opt;
1205     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1206     opt->setPropertyNode(globals->get_props());
1207     simgear::Effect* effect = simgear::makeEffect(stage->effect, true, opt.get());
1208     if (!effect) {
1209         SG_LOG(SG_VIEW, SG_ALERT, stage->effect + " not found");
1210         return;
1211     }
1212     eg->setEffect(effect);
1213     eg->setCullingActive(false);
1214     eg->addDrawable(g);
1215     camera->setViewMatrix(osg::Matrix::identity());
1216     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1217     camera->addChild(eg);
1218
1219     osg::StateSet* ss = camera->getOrCreateStateSet();
1220     ss->addUniform( _depthInColor );
1221     ss->addUniform( info->projInverse );
1222     ss->addUniform( info->viewInverse );
1223     ss->addUniform( info->view );
1224     ss->addUniform( info->bufferSize );
1225     ss->addUniform( info->worldPosCart );
1226     ss->addUniform( info->worldPosGeod );
1227     ss->addUniform( info->shadowMatrix[0] );
1228     ss->addUniform( info->shadowMatrix[1] );
1229     ss->addUniform( info->shadowMatrix[2] );
1230     ss->addUniform( info->shadowMatrix[3] );
1231     ss->addUniform( _ambientFactor );
1232     ss->addUniform( _sunDiffuse );
1233     ss->addUniform( _sunSpecular );
1234     ss->addUniform( _sunDirection );
1235     ss->addUniform( _planes );
1236     ss->addUniform( _shadowNumber );
1237     ss->addUniform( _shadowDistances );
1238     ss->addUniform( _fogColor );
1239     ss->addUniform( _fogDensity );
1240 }
1241
1242 void
1243 FGRenderer::buildStage(CameraInfo* info,
1244                         FGRenderingPipeline::Stage* stage,
1245                         CameraGroup* cgroup,
1246                         osg::Camera* mainCamera,
1247                         const osg::Matrix& view, const osg::Matrix& projection, osg::GraphicsContext* gc)
1248 {
1249     if (!stage->valid())
1250         return;
1251
1252     ref_ptr<Camera> camera;
1253     bool needOffsets = false;
1254     if (stage->type == "geometry") {
1255         camera = buildDeferredGeometryCamera(info, gc, stage->name, stage->attachments);
1256         needOffsets = true;
1257     } else if (stage->type == "lighting") {
1258         camera = buildDeferredLightingCamera(info, gc, stage);
1259         needOffsets = true;
1260     } else if (stage->type == "shadow")
1261         camera = buildDeferredShadowCamera(info, gc, stage->name, stage->attachments);
1262     else if (stage->type == "fullscreen")
1263         camera = buildDeferredFullscreenCamera(info, gc, stage);
1264     else if (stage->type == "display") {
1265         camera = mainCamera;
1266         buildDeferredDisplayCamera(camera, info, stage, gc);
1267     } else
1268         throw sg_exception("Stage type is not supported");
1269
1270     if (needOffsets)
1271         cgroup->getViewer()->addSlave(camera, projection, view, false);
1272     else
1273         cgroup->getViewer()->addSlave(camera, false);
1274     installCullVisitor(camera);
1275     int slaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
1276     if (stage->type == "display")
1277         info->addCamera( stage->type, camera, slaveIndex, true );
1278     info->getRenderStageInfo(stage->name).slaveIndex = slaveIndex;
1279 }
1280
1281 osg::Node*
1282 FGRenderer::buildLightingSkyCloudsPass(FGRenderingPipeline::Pass* pass)
1283 {
1284     Group* group = new Group;
1285     StateSet* ss = group->getOrCreateStateSet();
1286     ss->setAttributeAndModes( new osg::ColorMask( true, true, true, false ), osg::StateAttribute::ON );
1287     group->addChild( _sky->getPreRoot() );
1288     group->addChild( _sky->getCloudRoot() );
1289     return group;
1290 }
1291
1292 osg::Node*
1293 FGRenderer::buildLightingLightsPass(CameraInfo* info, FGRenderingPipeline::Pass* pass)
1294 {
1295     osg::Camera* lightCam = new osg::Camera;
1296     StateSet* ss = lightCam->getOrCreateStateSet();
1297     ss->addUniform( _planes );
1298     ss->addUniform( info->bufferSize );
1299     ss->addUniform( _fogColor );
1300     ss->addUniform( _fogDensity );
1301     lightCam->setName( "LightCamera" );
1302     lightCam->setClearMask(0);
1303     lightCam->setAllowEventFocus(false);
1304     lightCam->setReferenceFrame(osg::Transform::RELATIVE_RF);
1305     lightCam->setRenderOrder(osg::Camera::NESTED_RENDER,pass->orderNum);
1306     lightCam->setViewMatrix(osg::Matrix::identity());
1307     lightCam->setProjectionMatrix(osg::Matrix::identity());
1308     lightCam->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1309     lightCam->setCullMask( simgear::MODELLIGHT_BIT | simgear::PANEL2D_BIT | simgear::PERMANENTLIGHT_BIT);
1310     lightCam->setInheritanceMask( osg::CullSettings::ALL_VARIABLES & ~osg::CullSettings::CULL_MASK );
1311     lightCam->addChild( mDeferredRealRoot.get() );
1312
1313     return lightCam;
1314 }
1315
1316 osg::Node*
1317 FGRenderer::buildPass(CameraInfo* info, FGRenderingPipeline::Pass* pass)
1318 {
1319     if (!pass->valid())
1320         return 0;
1321
1322     ref_ptr<Node> node;
1323     if (pass->type == "sky-clouds")
1324         node = buildLightingSkyCloudsPass(pass);
1325     else if (pass->type == "fullscreen")
1326         node = buildDeferredFullscreenCamera(info, pass);
1327     else if (pass->type == "lights")
1328         node = buildLightingLightsPass(info, pass);
1329     else
1330         throw sg_exception("Pass type is not supported");
1331
1332     return node.release();
1333 }
1334
1335 void
1336 FGRenderer::buildBuffers(FGRenderingPipeline* rpipe, CameraInfo* info)
1337 {
1338     for (size_t i = 0; i < rpipe->buffers.size(); ++i) {
1339         osg::ref_ptr<FGRenderingPipeline::Buffer> buffer = rpipe->buffers[i];
1340         if (buffer->valid()) {
1341             bool fullscreen = buffer->width == -1 && buffer->height == -1;
1342             info->addBuffer(buffer->name, buildDeferredBuffer( buffer->internalFormat,
1343                                                                 buffer->sourceFormat,
1344                                                                 buffer->sourceType,
1345                                                                 buffer->wrapMode,
1346                                                                 buffer->shadowComparison),
1347                             fullscreen ? buffer->scaleFactor : 0.0f);
1348             if (!fullscreen) {
1349                 info->getBuffer(buffer->name)->setTextureSize(buffer->width, buffer->height);
1350             }
1351         }
1352     }
1353 }
1354
1355 CameraInfo* FGRenderer::buildCameraFromRenderingPipeline(FGRenderingPipeline* rpipe, CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
1356                                     const osg::Matrix& view, const osg::Matrix& projection, osg::GraphicsContext* gc)
1357 {
1358     CameraInfo* info = new CameraInfo(flags);
1359     buildBuffers(rpipe, info);
1360
1361     for (size_t i = 0; i < rpipe->stages.size(); ++i) {
1362         osg::ref_ptr<FGRenderingPipeline::Stage> stage = rpipe->stages[i];
1363         buildStage(info, stage, cgroup, camera, view, projection, gc);
1364     }
1365
1366     cgroup->addCamera(info);
1367
1368     return info;
1369 }
1370
1371 void
1372 FGRenderer::setupView( void )
1373 {
1374     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1375     osg::initNotifyLevel();
1376
1377     // The number of polygon-offset "units" to place between layers.  In
1378     // principle, one is supposed to be enough.  In practice, I find that
1379     // my hardware/driver requires many more.
1380     osg::PolygonOffset::setUnitsMultiplier(1);
1381     osg::PolygonOffset::setFactorMultiplier(1);
1382
1383 // build the sky
1384     // The sun and moon diameters are scaled down numbers of the
1385     // actual diameters. This was needed to fit both the sun and the
1386     // moon within the distance to the far clip plane.
1387     // Moon diameter:    3,476 kilometers
1388     // Sun diameter: 1,390,000 kilometers
1389     osg::ref_ptr<SGReaderWriterOptions> opt;
1390     opt = SGReaderWriterOptions::fromPath(globals->get_fg_root());
1391     opt->setPropertyNode(globals->get_props());
1392     _sky->build( 80000.0, 80000.0,
1393                   463.3, 361.8,
1394                   *globals->get_ephem(),
1395                   fgGetNode("/environment", true),
1396                   opt.get());
1397
1398     viewer->getCamera()
1399         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1400
1401     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
1402
1403     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
1404
1405     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
1406     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1407
1408     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
1409     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
1410     stateSet->setAttribute(new osg::BlendFunc);
1411     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
1412
1413     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
1414
1415     // this will be set below
1416     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
1417
1418     osg::Material* material = new osg::Material;
1419     stateSet->setAttribute(material);
1420
1421     stateSet->setTextureAttribute(0, new osg::TexEnv);
1422     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
1423
1424     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
1425     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
1426     stateSet->setAttribute(hint);
1427     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
1428     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
1429     stateSet->setAttribute(hint);
1430     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
1431     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
1432     stateSet->setAttribute(hint);
1433     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
1434     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
1435     stateSet->setAttribute(hint);
1436     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
1437     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
1438     stateSet->setAttribute(hint);
1439
1440     osg::Group* sceneGroup = new osg::Group;
1441     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
1442     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
1443
1444     //sceneGroup->addChild(thesky->getCloudRoot());
1445
1446     stateSet = sceneGroup->getOrCreateStateSet();
1447     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
1448
1449     // need to update the light on every frame
1450     // OSG LightSource objects are rather confusing. OSG only supports
1451     // the 10 lights specified by OpenGL itself; if more than one
1452     // LightSource in the scene graph have the same light number, it's
1453     // indeterminate which values will be used to render geometry that
1454     // has that light number enabled. Also, adding children to a
1455     // LightSource is just a shortcut for setting up a state set that
1456     // has the corresponding OpenGL light enabled: a LightSource will
1457     // affect geometry anywhere in the scene graph that has its light
1458     // number enabled in a state set.
1459     LightSource* lightSource = new LightSource;
1460     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
1461     // relative because of CameraView being just a clever transform node
1462     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
1463     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
1464     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
1465     mRealRoot->addChild(lightSource);
1466     // we need a white diffuse light for the phase of the moon
1467     osg::LightSource* sunLight = new osg::LightSource;
1468     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
1469     sunLight->getLight()->setLightNum(1);
1470     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
1471     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
1472     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
1473
1474     // Hang a StateSet above the sky subgraph in order to turn off
1475     // light 0
1476     Group* skyGroup = new Group;
1477     StateSet* skySS = skyGroup->getOrCreateStateSet();
1478     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
1479     skyGroup->addChild(_sky->getPreRoot());
1480     sunLight->addChild(skyGroup);
1481     mRoot->addChild(sceneGroup);
1482     if ( _classicalRenderer )
1483         mRoot->addChild(sunLight);
1484
1485     // Clouds are added to the scene graph later
1486     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
1487     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
1488     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
1489     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
1490
1491     // enable disable specular highlights.
1492     // is the place where we might plug in an other fragment shader ...
1493     osg::LightModel* lightModel = new osg::LightModel;
1494     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
1495     stateSet->setAttribute(lightModel);
1496
1497     // switch to enable wireframe
1498     osg::PolygonMode* polygonMode = new osg::PolygonMode;
1499     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
1500     stateSet->setAttributeAndModes(polygonMode);
1501
1502     // scene fog handling
1503     osg::Fog* fog = new osg::Fog;
1504     fog->setUpdateCallback(new FGFogUpdateCallback);
1505     stateSet->setAttributeAndModes(fog);
1506     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
1507
1508     // plug in the GUI
1509     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
1510     if (guiCamera) {
1511
1512         osg::Geode* geode = new osg::Geode;
1513         geode->addDrawable(new SGPuDrawable);
1514         geode->addDrawable(new SGHUDDrawable);
1515         guiCamera->addChild(geode);
1516
1517
1518       guiCamera->addChild(FGPanelNode::create2DPanelNode());
1519     }
1520
1521     osg::Switch* sw = new osg::Switch;
1522     sw->setUpdateCallback(new FGScenerySwitchCallback);
1523     sw->addChild(mRoot.get());
1524     mRealRoot->addChild(sw);
1525     // The clouds are attached directly to the scene graph root
1526     // because, in theory, they don't want the same default state set
1527     // as the rest of the scene. This may not be true in practice.
1528         if ( _classicalRenderer ) {
1529                 mRealRoot->addChild(_sky->getCloudRoot());
1530                 mRealRoot->addChild(FGCreateRedoutNode());
1531         }
1532     // Attach empty program to the scene root so that shader programs
1533     // don't leak into state sets (effects) that shouldn't have one.
1534     stateSet = mRealRoot->getOrCreateStateSet();
1535     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
1536
1537     mDeferredRealRoot->addChild( mRealRoot.get() );
1538
1539     DeletionManager::install(mRealRoot.get());
1540 }
1541
1542 // Update all Visuals (redraws anything graphics related)
1543 void
1544 FGRenderer::update( ) {
1545     if (!_scenery_loaded->getBoolValue())
1546     {
1547         _splash_alpha->setDoubleValue(1.0);
1548         return;
1549     }
1550     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1551
1552     if (_splash_alpha->getDoubleValue()>0.0)
1553     {
1554         // Fade out the splash screen
1555         const double fade_time = 0.5;
1556         const double fade_steps_per_sec = 10;
1557         double delay_time = SGMiscd::min(fade_time/fade_steps_per_sec,
1558                                          (SGTimeStamp::now() - _splash_time).toSecs());
1559         _splash_time = SGTimeStamp::now();
1560         double sAlpha = _splash_alpha->getDoubleValue();
1561         sAlpha -= SGMiscd::max(0.0,delay_time/fade_time);
1562         FGScenerySwitchCallback::scenery_enabled = (sAlpha<1.0);
1563         _splash_alpha->setDoubleValue((sAlpha < 0) ? 0.0 : sAlpha);
1564     }
1565
1566     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
1567         if (!_classicalRenderer ) {
1568                 _ambientFactor->set( toOsg(l->scene_ambient()) );
1569                 _sunDiffuse->set( toOsg(l->scene_diffuse()) );
1570                 _sunSpecular->set( toOsg(l->scene_specular()) );
1571                 _sunDirection->set( osg::Vec3f(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]) );
1572         }
1573
1574     // update fog params
1575     double actual_visibility;
1576     if (_cloud_status->getBoolValue()) {
1577         actual_visibility = _sky->get_visibility();
1578     } else {
1579         actual_visibility = _visibility_m->getDoubleValue();
1580     }
1581
1582     // idle_state is now 1000 meaning we've finished all our
1583     // initializations and are running the main loop, so this will
1584     // now work without seg faulting the system.
1585
1586     FGViewer *current__view = globals->get_current_view();
1587     // Force update of center dependent values ...
1588     current__view->set_dirty();
1589
1590     osg::Camera *camera = viewer->getCamera();
1591
1592     bool skyblend = _skyblend->getBoolValue();
1593     if ( skyblend ) {
1594
1595         if ( _textures->getBoolValue() ) {
1596             SGVec4f clearColor(l->adj_fog_color());
1597             camera->setClearColor(toOsg(clearColor));
1598         }
1599     } else {
1600         SGVec4f clearColor(l->sky_color());
1601         camera->setClearColor(toOsg(clearColor));
1602     }
1603
1604     // update fog params if visibility has changed
1605     double visibility_meters = _visibility_m->getDoubleValue();
1606     _sky->set_visibility(visibility_meters);
1607
1608     double altitude_m = _altitude_ft->getDoubleValue() * SG_FEET_TO_METER;
1609     _sky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
1610
1611     // update the sky dome
1612     if ( skyblend ) {
1613
1614         // The sun and moon distances are scaled down versions
1615         // of the actual distance to get both the moon and the sun
1616         // within the range of the far clip plane.
1617         // Moon distance:    384,467 kilometers
1618         // Sun distance: 150,000,000 kilometers
1619
1620         double sun_horiz_eff, moon_horiz_eff;
1621         if (_horizon_effect->getBoolValue()) {
1622             sun_horiz_eff
1623                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
1624                                              0.0),
1625                              0.33) / 3.0;
1626             moon_horiz_eff
1627                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
1628                                              0.0),
1629                              0.33)/3.0;
1630         } else {
1631            sun_horiz_eff = moon_horiz_eff = 1.0;
1632         }
1633
1634         SGSkyState sstate;
1635         sstate.pos       = current__view->getViewPosition();
1636         sstate.pos_geod  = current__view->getPosition();
1637         sstate.ori       = current__view->getViewOrientation();
1638         sstate.spin      = l->get_sun_rotation();
1639         sstate.gst       = globals->get_time_params()->getGst();
1640         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
1641         sstate.moon_dist = 40000.0 * moon_horiz_eff;
1642         sstate.sun_angle = l->get_sun_angle();
1643
1644         SGSkyColor scolor;
1645         scolor.sky_color   = SGVec3f(l->sky_color().data());
1646         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
1647         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
1648         scolor.cloud_color = SGVec3f(l->cloud_color().data());
1649         scolor.sun_angle   = l->get_sun_angle();
1650         scolor.moon_angle  = l->get_moon_angle();
1651
1652         double delta_time_sec = _sim_delta_sec->getDoubleValue();
1653         _sky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
1654         _sky->repaint( scolor, *globals->get_ephem() );
1655
1656             //OSGFIXME
1657 //         shadows->setupShadows(
1658 //           current__view->getLongitude_deg(),
1659 //           current__view->getLatitude_deg(),
1660 //           globals->get_time_params()->getGst(),
1661 //           globals->get_ephem()->getSunRightAscension(),
1662 //           globals->get_ephem()->getSunDeclination(),
1663 //           l->get_sun_angle());
1664
1665     }
1666
1667 //     sgEnviro.setLight(l->adj_fog_color());
1668 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
1669 //         current__view->get_world_up(),
1670 //         current__view->getLongitude_deg(),
1671 //         current__view->getLatitude_deg(),
1672 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
1673 //         delta_time_sec);
1674
1675     // OSGFIXME
1676 //     sgEnviro.drawLightning();
1677
1678 //        double current_view_origin_airspeed_horiz_kt =
1679 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
1680 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
1681 //                                * SGD_DEGREES_TO_RADIANS);
1682
1683     // OSGFIXME
1684 //     if( is_internal )
1685 //         shadows->endOfFrame();
1686
1687     // need to call the update visitor once
1688     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
1689     mUpdateVisitor->setViewData(current__view->getViewPosition(),
1690                                 current__view->getViewOrientation());
1691     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
1692     mUpdateVisitor->setLight(direction, l->scene_ambient(),
1693                              l->scene_diffuse(), l->scene_specular(),
1694                              l->adj_fog_color(),
1695                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
1696     mUpdateVisitor->setVisibility(actual_visibility);
1697     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
1698     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
1699     cullMask |= simgear::GroundLightManager::instance()
1700         ->getLightNodeMask(mUpdateVisitor.get());
1701     if (_panel_hotspots->getBoolValue())
1702         cullMask |= simgear::PICK_BIT;
1703     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
1704         if ( !_classicalRenderer ) {
1705                 _fogColor->set( toOsg( l->adj_fog_color() ) );
1706                 _fogDensity->set( float( mUpdateVisitor->getFogExp2Density() ) );
1707         }
1708 }
1709
1710 void
1711 FGRenderer::resize( int width, int height )
1712 {
1713     int curWidth = _xsize->getIntValue(),
1714         curHeight = _ysize->getIntValue();
1715     SG_LOG(SG_VIEW, SG_DEBUG, "FGRenderer::resize: new size " << width << " x " << height);
1716     if ((curHeight != height) || (curWidth != width)) {
1717     // must guard setting these, or PLIB-PUI fails with too many live interfaces
1718         _xsize->setIntValue(width);
1719         _ysize->setIntValue(height);
1720     }
1721 }
1722
1723 bool
1724 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
1725                  const osgGA::GUIEventAdapter* ea)
1726 {
1727     // wipe out the return ...
1728     pickList.clear();
1729     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
1730     Intersections intersections;
1731
1732     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
1733         return false;
1734     for (Intersections::iterator hit = intersections.begin(),
1735              e = intersections.end();
1736          hit != e;
1737          ++hit) {
1738         const osg::NodePath& np = hit->nodePath;
1739         osg::NodePath::const_reverse_iterator npi;
1740         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1741             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1742             if (!ud)
1743                 continue;
1744             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1745                 SGPickCallback* pickCallback = ud->getPickCallback(i);
1746                 if (!pickCallback)
1747                     continue;
1748                 SGSceneryPick sceneryPick;
1749                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
1750                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
1751                 sceneryPick.callback = pickCallback;
1752                 pickList.push_back(sceneryPick);
1753             }
1754         }
1755     }
1756     return !pickList.empty();
1757 }
1758
1759 void
1760 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
1761 {
1762     viewer = viewer_;
1763 }
1764
1765 void
1766 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
1767 {
1768     eventHandler = eventHandler_;
1769 }
1770
1771 void
1772 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
1773 {
1774     mRealRoot->addChild(camera);
1775 }
1776
1777 void
1778 FGRenderer::removeCamera(osg::Camera* camera)
1779 {
1780     mRealRoot->removeChild(camera);
1781 }
1782
1783 void
1784 FGRenderer::setPlanes( double zNear, double zFar )
1785 {
1786         _planes->set( osg::Vec3f( - zFar, - zFar * zNear, zFar - zNear ) );
1787 }
1788
1789 bool
1790 fgDumpSceneGraphToFile(const char* filename)
1791 {
1792     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
1793 }
1794
1795 bool
1796 fgDumpTerrainBranchToFile(const char* filename)
1797 {
1798     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
1799                                  filename );
1800 }
1801
1802 // For debugging
1803 bool
1804 fgDumpNodeToFile(osg::Node* node, const char* filename)
1805 {
1806     return osgDB::writeNodeFile(*node, filename);
1807 }
1808
1809 namespace flightgear
1810 {
1811 using namespace osg;
1812
1813 class VisibleSceneInfoVistor : public NodeVisitor, CullStack
1814 {
1815 public:
1816     VisibleSceneInfoVistor()
1817         : NodeVisitor(CULL_VISITOR, TRAVERSE_ACTIVE_CHILDREN)
1818     {
1819         setCullingMode(CullSettings::SMALL_FEATURE_CULLING
1820                        | CullSettings::VIEW_FRUSTUM_CULLING);
1821         setComputeNearFarMode(CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1822     }
1823
1824     VisibleSceneInfoVistor(const VisibleSceneInfoVistor& rhs)
1825     {
1826     }
1827
1828     META_NodeVisitor("flightgear","VisibleSceneInfoVistor")
1829
1830     typedef std::map<const std::string,int> InfoMap;
1831
1832     void getNodeInfo(Node* node)
1833     {
1834         const char* typeName = typeid(*node).name();
1835         classInfo[typeName]++;
1836         const std::string& nodeName = node->getName();
1837         if (!nodeName.empty())
1838             nodeInfo[nodeName]++;
1839     }
1840
1841     void dumpInfo()
1842     {
1843         using namespace std;
1844         typedef vector<InfoMap::iterator> FreqVector;
1845         cout << "class info:\n";
1846         FreqVector classes;
1847         for (InfoMap::iterator itr = classInfo.begin(), end = classInfo.end();
1848              itr != end;
1849              ++itr)
1850             classes.push_back(itr);
1851         sort(classes.begin(), classes.end(), freqComp);
1852         for (FreqVector::iterator itr = classes.begin(), end = classes.end();
1853              itr != end;
1854              ++itr) {
1855             cout << (*itr)->first << " " << (*itr)->second << "\n";
1856         }
1857         cout << "\nnode info:\n";
1858         FreqVector nodes;
1859         for (InfoMap::iterator itr = nodeInfo.begin(), end = nodeInfo.end();
1860              itr != end;
1861              ++itr)
1862             nodes.push_back(itr);
1863
1864         sort (nodes.begin(), nodes.end(), freqComp);
1865         for (FreqVector::iterator itr = nodes.begin(), end = nodes.end();
1866              itr != end;
1867              ++itr) {
1868             cout << (*itr)->first << " " << (*itr)->second << "\n";
1869         }
1870         cout << endl;
1871     }
1872
1873     void doTraversal(Camera* camera, Node* root, Viewport* viewport)
1874     {
1875         ref_ptr<RefMatrix> projection
1876             = createOrReuseMatrix(camera->getProjectionMatrix());
1877         ref_ptr<RefMatrix> mv = createOrReuseMatrix(camera->getViewMatrix());
1878         if (!viewport)
1879             viewport = camera->getViewport();
1880         if (viewport)
1881             pushViewport(viewport);
1882         pushProjectionMatrix(projection.get());
1883         pushModelViewMatrix(mv.get(), Transform::ABSOLUTE_RF);
1884         root->accept(*this);
1885         popModelViewMatrix();
1886         popProjectionMatrix();
1887         if (viewport)
1888             popViewport();
1889         dumpInfo();
1890     }
1891
1892     void apply(Node& node)
1893     {
1894         if (isCulled(node))
1895             return;
1896         pushCurrentMask();
1897         getNodeInfo(&node);
1898         traverse(node);
1899         popCurrentMask();
1900     }
1901     void apply(Group& node)
1902     {
1903         if (isCulled(node))
1904             return;
1905         pushCurrentMask();
1906         getNodeInfo(&node);
1907         traverse(node);
1908         popCurrentMask();
1909     }
1910
1911     void apply(Transform& node)
1912     {
1913         if (isCulled(node))
1914             return;
1915         pushCurrentMask();
1916         ref_ptr<RefMatrix> matrix = createOrReuseMatrix(*getModelViewMatrix());
1917         node.computeLocalToWorldMatrix(*matrix,this);
1918         pushModelViewMatrix(matrix.get(), node.getReferenceFrame());
1919         getNodeInfo(&node);
1920         traverse(node);
1921         popModelViewMatrix();
1922         popCurrentMask();
1923     }
1924
1925     void apply(Camera& camera)
1926     {
1927         // Save current cull settings
1928         CullSettings saved_cull_settings(*this);
1929
1930         // set cull settings from this Camera
1931         setCullSettings(camera);
1932         // inherit the settings from above
1933         inheritCullSettings(saved_cull_settings, camera.getInheritanceMask());
1934
1935         // set the cull mask.
1936         unsigned int savedTraversalMask = getTraversalMask();
1937         bool mustSetCullMask = (camera.getInheritanceMask()
1938                                 & osg::CullSettings::CULL_MASK) == 0;
1939         if (mustSetCullMask)
1940             setTraversalMask(camera.getCullMask());
1941
1942         osg::RefMatrix* projection = 0;
1943         osg::RefMatrix* modelview = 0;
1944
1945         if (camera.getReferenceFrame()==osg::Transform::RELATIVE_RF) {
1946             if (camera.getTransformOrder()==osg::Camera::POST_MULTIPLY) {
1947                 projection = createOrReuseMatrix(*getProjectionMatrix()
1948                                                  *camera.getProjectionMatrix());
1949                 modelview = createOrReuseMatrix(*getModelViewMatrix()
1950                                                 * camera.getViewMatrix());
1951             }
1952             else {              // pre multiply
1953                 projection = createOrReuseMatrix(camera.getProjectionMatrix()
1954                                                  * (*getProjectionMatrix()));
1955                 modelview = createOrReuseMatrix(camera.getViewMatrix()
1956                                                 * (*getModelViewMatrix()));
1957             }
1958         } else {
1959             // an absolute reference frame
1960             projection = createOrReuseMatrix(camera.getProjectionMatrix());
1961             modelview = createOrReuseMatrix(camera.getViewMatrix());
1962         }
1963         if (camera.getViewport())
1964             pushViewport(camera.getViewport());
1965
1966         pushProjectionMatrix(projection);
1967         pushModelViewMatrix(modelview, camera.getReferenceFrame());
1968
1969         traverse(camera);
1970
1971         // restore the previous model view matrix.
1972         popModelViewMatrix();
1973
1974         // restore the previous model view matrix.
1975         popProjectionMatrix();
1976
1977         if (camera.getViewport()) popViewport();
1978
1979         // restore the previous traversal mask settings
1980         if (mustSetCullMask)
1981             setTraversalMask(savedTraversalMask);
1982
1983         // restore the previous cull settings
1984         setCullSettings(saved_cull_settings);
1985     }
1986
1987 protected:
1988     // sort in reverse
1989     static bool freqComp(const InfoMap::iterator& lhs, const InfoMap::iterator& rhs)
1990     {
1991         return lhs->second > rhs->second;
1992     }
1993     InfoMap classInfo;
1994     InfoMap nodeInfo;
1995 };
1996
1997 bool printVisibleSceneInfo(FGRenderer* renderer)
1998 {
1999     osgViewer::Viewer* viewer = renderer->getViewer();
2000     VisibleSceneInfoVistor vsv;
2001     Viewport* vp = 0;
2002     if (!viewer->getCamera()->getViewport() && viewer->getNumSlaves() > 0) {
2003         const View::Slave& slave = viewer->getSlave(0);
2004         vp = slave._camera->getViewport();
2005     }
2006     vsv.doTraversal(viewer->getCamera(), viewer->getSceneData(), vp);
2007     return true;
2008 }
2009
2010 }
2011 // end of renderer.cxx
2012