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 #ifdef FG_JPEG_SERVER
 387 static void updateRenderer()
 388 {
 389     globals->get_renderer()->update();
 390 }
 391 #endif
 392
 393 FGRenderer::FGRenderer() :
 394     _sky(NULL),
 395     _ambientFactor( new osg::Uniform( "fg_SunAmbientColor", osg::Vec4f() ) ),
 396     _sunDiffuse( new osg::Uniform( "fg_SunDiffuseColor", osg::Vec4f() ) ),
 397     _sunSpecular( new osg::Uniform( "fg_SunSpecularColor", osg::Vec4f() ) ),
 398     _sunDirection( new osg::Uniform( "fg_SunDirection", osg::Vec3f() ) ),
 399     _planes( new osg::Uniform( "fg_Planes", osg::Vec3f() ) ),
 400     _fogColor( new osg::Uniform( "fg_FogColor", osg::Vec4f(1.0, 1.0, 1.0, 1.0) ) ),
 401     _fogDensity( new osg::Uniform( "fg_FogDensity", 0.0001f ) ),
 402     _shadowNumber( new osg::Uniform( "fg_ShadowNumber", (int)4 ) ),
 403     _shadowDistances( new osg::Uniform( "fg_ShadowDistances", osg::Vec4f(5.0, 50.0, 500.0, 5000.0 ) ) ),
 404     _depthInColor( new osg::Uniform( "fg_DepthInColor", false ) )
 405 {
 406 #ifdef FG_JPEG_SERVER
 407    jpgRenderFrame = updateRenderer;
 408 #endif
 409    eventHandler = new FGEventHandler;
 410
 411    _numCascades = 4;
 412    _cascadeFar[0] = 5.f;
 413    _cascadeFar[1] = 50.f;
 414    _cascadeFar[2] = 500.f;
 415    _cascadeFar[3] = 5000.f;
 416 }
 417
 418 FGRenderer::~FGRenderer()
 419 {
 420 #ifdef FG_JPEG_SERVER
 421    jpgRenderFrame = NULL;
 422 #endif
 423     delete _sky;
 424 }
 425
 426 // Initialize various GL/view parameters
 427 // XXX This should be called "preinit" or something, as it initializes
 428 // critical parts of the scene graph in addition to the splash screen.
 429 void
 430 FGRenderer::splashinit( void ) {
 431     osgViewer::Viewer* viewer = getViewer();
 432     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 433     ref_ptr<Node> splashNode = fgCreateSplashNode();
 434     if (_classicalRenderer) {
 435         mRealRoot->addChild(splashNode.get());
 436     } else {
 437         for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
 438                 ii != CameraGroup::getDefault()->camerasEnd();
 439                 ++ii )
 440         {
 441             CameraInfo* info = ii->get();
 442             Camera* camera = info->getCamera(DISPLAY_CAMERA);
 443             if (camera == 0) continue;
 444
 445             camera->addChild(splashNode.get());
 446         }
 447     }
 448     mFrameStamp = viewer->getFrameStamp();
 449     // Scene doesn't seem to pass the frame stamp to the update
 450     // visitor automatically.
 451     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 452     viewer->setUpdateVisitor(mUpdateVisitor.get());
 453     fgSetDouble("/sim/startup/splash-alpha", 1.0);
 454 }
 455
 456 class ShadowMapSizeListener : public SGPropertyChangeListener {
 457 public:
 458     virtual void valueChanged(SGPropertyNode* node) {
 459         globals->get_renderer()->updateShadowMapSize(node->getIntValue());
 460     }
 461 };
 462
 463 class ShadowEnabledListener : public SGPropertyChangeListener {
 464 public:
 465     virtual void valueChanged(SGPropertyNode* node) {
 466         globals->get_renderer()->enableShadows(node->getBoolValue());
 467     }
 468 };
 469
 470 class ShadowNumListener : public SGPropertyChangeListener {
 471 public:
 472     virtual void valueChanged(SGPropertyNode* node) {
 473         globals->get_renderer()->updateCascadeNumber(node->getIntValue());
 474     }
 475 };
 476
 477 class ShadowRangeListener : public SGPropertyChangeListener {
 478 public:
 479     virtual void valueChanged(SGPropertyNode* node) {
 480         globals->get_renderer()->updateCascadeFar(node->getIndex(), node->getFloatValue());
 481     }
 482 };
 483
 484 void
 485 FGRenderer::init( void )
 486 {
 487     sgUserDataInit( globals->get_props() );
 488
 489     _classicalRenderer = !fgGetBool("/sim/rendering/rembrandt/enabled", false);
 490     _shadowMapSize    = fgGetInt( "/sim/rendering/shadows/map-size", 4096 );
 491     fgAddChangeListener( new ShadowMapSizeListener, "/sim/rendering/shadows/map-size" );
 492     fgAddChangeListener( new ShadowEnabledListener, "/sim/rendering/shadows/enabled" );
 493     ShadowRangeListener* srl = new ShadowRangeListener;
 494     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[0]");
 495     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[1]");
 496     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[2]");
 497     fgAddChangeListener(srl, "/sim/rendering/shadows/cascade-far-m[3]");
 498     fgAddChangeListener(new ShadowNumListener, "/sim/rendering/shadows/num-cascades");
 499     _numCascades = fgGetInt("/sim/rendering/shadows/num-cascades", 4);
 500     _cascadeFar[0] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[0]", 5.0f);
 501     _cascadeFar[1] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[1]", 50.0f);
 502     _cascadeFar[2] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[2]", 500.0f);
 503     _cascadeFar[3] = fgGetFloat("/sim/rendering/shadows/cascade-far-m[3]", 5000.0f);
 504     updateCascadeNumber(_numCascades);
 505     updateCascadeFar(0, _cascadeFar[0]);
 506     updateCascadeFar(1, _cascadeFar[1]);
 507     updateCascadeFar(2, _cascadeFar[2]);
 508     updateCascadeFar(3, _cascadeFar[3]);
 509     _useColorForDepth = fgGetBool( "/sim/rendering/rembrandt/use-color-for-depth", false );
 510     _depthInColor->set( _useColorForDepth );
 511
 512     _renderer         = fgGetString("/sim/rendering/rembrandt/renderer", "default-pipeline");
 513     if (!_classicalRenderer)
 514         _pipeline = makeRenderingPipeline(_renderer, 0);
 515     _scenery_loaded   = fgGetNode("/sim/sceneryloaded", true);
 516     _scenery_override = fgGetNode("/sim/sceneryloaded-override", true);
 517     _panel_hotspots   = fgGetNode("/sim/panel-hotspots", true);
 518     _virtual_cockpit  = fgGetNode("/sim/virtual-cockpit", true);
 519
 520     _sim_delta_sec = fgGetNode("/sim/time/delta-sec", true);
 521
 522     _xsize         = fgGetNode("/sim/startup/xsize", true);
 523     _ysize         = fgGetNode("/sim/startup/ysize", true);
 524     _splash_alpha  = fgGetNode("/sim/startup/splash-alpha", true);
 525
 526     _skyblend             = fgGetNode("/sim/rendering/skyblend", true);
 527     _point_sprites        = fgGetNode("/sim/rendering/point-sprites", true);
 528     _enhanced_lighting    = fgGetNode("/sim/rendering/enhanced-lighting", true);
 529     _distance_attenuation = fgGetNode("/sim/rendering/distance-attenuation", true);
 530     _horizon_effect       = fgGetNode("/sim/rendering/horizon-effect", true);
 531     _textures             = fgGetNode("/sim/rendering/textures", true);
 532
 533     _altitude_ft = fgGetNode("/position/altitude-ft", true);
 534
 535     _cloud_status = fgGetNode("/environment/clouds/status", true);
 536     _visibility_m = fgGetNode("/environment/visibility-m", true);
 537
 538     bool use_point_sprites = _point_sprites->getBoolValue();
 539     bool enhanced_lighting = _enhanced_lighting->getBoolValue();
 540     bool distance_attenuation = _distance_attenuation->getBoolValue();
 541
 542     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 543                                   distance_attenuation );
 544
 545     if (const char* tc = fgGetString("/sim/rendering/texture-compression", NULL)) {
 546       if (strcmp(tc, "false") == 0 || strcmp(tc, "off") == 0 ||
 547           strcmp(tc, "0") == 0 || strcmp(tc, "no") == 0 ||
 548           strcmp(tc, "none") == 0) {
 549         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::DoNotUseCompression);
 550       } else if (strcmp(tc, "arb") == 0) {
 551         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseARBCompression);
 552       } else if (strcmp(tc, "dxt1") == 0) {
 553         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT1Compression);
 554       } else if (strcmp(tc, "dxt3") == 0) {
 555         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT3Compression);
 556       } else if (strcmp(tc, "dxt5") == 0) {
 557         SGSceneFeatures::instance()->setTextureCompression(SGSceneFeatures::UseDXT5Compression);
 558       } else {
 559         SG_LOG(SG_VIEW, SG_WARN, "Unknown texture compression setting!");
 560       }
 561     }
 562
 563 // create sky, but can't build until setupView, since we depend
 564 // on other subsystems to be inited, eg Ephemeris
 565     _sky = new SGSky;
 566
 567     SGPath texture_path(globals->get_fg_root());
 568     texture_path.append("Textures");
 569     texture_path.append("Sky");
 570     for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
 571         SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
 572         _sky->add_cloud_layer(layer);
 573     }
 574
 575     _sky->texture_path( texture_path.str() );
 576
 577     if (!_classicalRenderer) {
 578         eventHandler->setChangeStatsCameraRenderOrder( true );
 579     }
 580 }
 581
 582 void installCullVisitor(Camera* camera)
 583 {
 584     osgViewer::Renderer* renderer
 585         = static_cast<osgViewer::Renderer*>(camera->getRenderer());
 586     for (int i = 0; i < 2; ++i) {
 587         osgUtil::SceneView* sceneView = renderer->getSceneView(i);
 588 #if SG_OSG_VERSION_LESS_THAN(3,0,0)
 589         sceneView->setCullVisitor(new simgear::EffectCullVisitor);
 590 #else
 591         osg::ref_ptr<osgUtil::CullVisitor::Identifier> identifier;
 592         identifier = sceneView->getCullVisitor()->getIdentifier();
 593         sceneView->setCullVisitor(new simgear::EffectCullVisitor);
 594         sceneView->getCullVisitor()->setIdentifier(identifier.get());
 595
 596         identifier = sceneView->getCullVisitorLeft()->getIdentifier();
 597         sceneView->setCullVisitorLeft(sceneView->getCullVisitor()->clone());
 598         sceneView->getCullVisitorLeft()->setIdentifier(identifier.get());
 599
 600         identifier = sceneView->getCullVisitorRight()->getIdentifier();
 601         sceneView->setCullVisitorRight(sceneView->getCullVisitor()->clone());
 602         sceneView->getCullVisitorRight()->setIdentifier(identifier.get());
 603 #endif
 604     }
 605 }
 606
 607 CameraInfo*
 608 FGRenderer::buildRenderingPipeline(CameraGroup* cgroup, unsigned flags, Camera* camera,
 609                                    const Matrix& view,
 610                                    const Matrix& projection,
 611                                                                    osg::GraphicsContext* gc,
 612                                    bool useMasterSceneData)
 613 {
 614         CameraInfo* info = 0;
 615         if (!_classicalRenderer && (flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0)
 616                 info = buildDeferredPipeline( cgroup, flags, camera, view, projection, gc );
 617
 618         if (info) {
 619                 return info;
 620         } else {
 621                 if ((flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0)
 622                         _classicalRenderer = true;
 623                 return buildClassicalPipeline( cgroup, flags, camera, view, projection, useMasterSceneData );
 624         }
 625 }
 626
 627 CameraInfo*
 628 FGRenderer::buildClassicalPipeline(CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
 629                                 const osg::Matrix& view,
 630                                 const osg::Matrix& projection,
 631                                 bool useMasterSceneData)
 632 {
 633     CameraInfo* info = new CameraInfo(flags);
 634     // The camera group will always update the camera
 635     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
 636
 637     Camera* farCamera = 0;
 638     if ((flags & (CameraGroup::GUI | CameraGroup::ORTHO)) == 0) {
 639         farCamera = new Camera;
 640         farCamera->setAllowEventFocus(camera->getAllowEventFocus());
 641         farCamera->setGraphicsContext(camera->getGraphicsContext());
 642         farCamera->setCullingMode(camera->getCullingMode());
 643         farCamera->setInheritanceMask(camera->getInheritanceMask());
 644         farCamera->setReferenceFrame(Transform::ABSOLUTE_RF);
 645         // Each camera's viewport is written when the window is
 646         // resized; if the the viewport isn't copied here, it gets updated
 647         // twice and ends up with the wrong value.
 648         farCamera->setViewport(simgear::clone(camera->getViewport()));
 649         farCamera->setDrawBuffer(camera->getDrawBuffer());
 650         farCamera->setReadBuffer(camera->getReadBuffer());
 651         farCamera->setRenderTargetImplementation(
 652             camera->getRenderTargetImplementation());
 653         const Camera::BufferAttachmentMap& bufferMap
 654             = camera->getBufferAttachmentMap();
 655         if (bufferMap.count(Camera::COLOR_BUFFER) != 0) {
 656             farCamera->attach(
 657                 Camera::COLOR_BUFFER,
 658                 bufferMap.find(Camera::COLOR_BUFFER)->second._texture.get());
 659         }
 660         cgroup->getViewer()->addSlave(farCamera, projection, view, useMasterSceneData);
 661         installCullVisitor(farCamera);
 662                 int farSlaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
 663                 info->addCamera( FAR_CAMERA, farCamera, farSlaveIndex );
 664         farCamera->setRenderOrder(Camera::POST_RENDER, farSlaveIndex);
 665         camera->setCullMask(camera->getCullMask() & ~simgear::BACKGROUND_BIT);
 666         camera->setClearMask(GL_DEPTH_BUFFER_BIT);
 667     }
 668     cgroup->getViewer()->addSlave(camera, projection, view, useMasterSceneData);
 669     installCullVisitor(camera);
 670     int slaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
 671     info->addCamera( MAIN_CAMERA, camera, slaveIndex );
 672     camera->setRenderOrder(Camera::POST_RENDER, slaveIndex);
 673     cgroup->addCamera(info);
 674     return info;
 675 }
 676
 677 class FGDeferredRenderingCameraCullCallback : public osg::NodeCallback {
 678 public:
 679     FGDeferredRenderingCameraCullCallback( const std::string& k, CameraInfo* i, bool nd = false ) : kind( k ), info( i ), needsDuDv(nd) {}
 680     virtual void operator()( osg::Node *n, osg::NodeVisitor *nv) {
 681         simgear::EffectCullVisitor* cv = dynamic_cast<simgear::EffectCullVisitor*>(nv);
 682         osg::Camera* camera = static_cast<osg::Camera*>(n);
 683
 684         cv->clearBufferList();
 685         for (RenderBufferMap::iterator ii = info->buffers.begin(); ii != info->buffers.end(); ++ii) {
 686             cv->addBuffer(ii->first, ii->second.texture);
 687         }
 688
 689         if ( !info->getRenderStageInfo(kind).fullscreen )
 690             info->setMatrices( camera );
 691
 692         if (needsDuDv) {
 693             osg::Matrix projInverse;
 694             info->projInverse->get( projInverse );
 695
 696             osg::Vec4 p0 = osg::Vec4( -1.0, -1.0, 0.0, 1.0 ) * projInverse;
 697             info->du->set( osg::Vec4(  1.0, -1.0, 0.0, 1.0 ) * projInverse - p0 );
 698             info->dv->set( osg::Vec4( -1.0,  1.0, 0.0, 1.0 ) * projInverse - p0 );
 699         }
 700
 701         cv->traverse( *camera );
 702
 703         if ( kind == GEOMETRY_CAMERA ) {
 704             // Save transparent bins to render later
 705             osgUtil::RenderStage* renderStage = cv->getRenderStage();
 706             osgUtil::RenderBin::RenderBinList& rbl = renderStage->getRenderBinList();
 707             for (osgUtil::RenderBin::RenderBinList::iterator rbi = rbl.begin(); rbi != rbl.end(); ) {
 708                 if (rbi->second->getSortMode() == osgUtil::RenderBin::SORT_BACK_TO_FRONT) {
 709                     info->savedTransparentBins.insert( std::make_pair( rbi->first, rbi->second ) );
 710                     rbl.erase( rbi++ );
 711                 } else {
 712                     ++rbi;
 713                 }
 714             }
 715         } else if ( kind == LIGHTING_CAMERA ) {
 716             osg::ref_ptr<osg::Camera> mainShadowCamera = info->getCamera( SHADOW_CAMERA );
 717             if (mainShadowCamera.valid()) {
 718                 osg::Switch* grp = mainShadowCamera->getChild(0)->asSwitch();
 719                 for (int i = 0; i < 4; ++i ) {
 720                     if (!grp->getValue(i))
 721                         continue;
 722                     osg::TexGen* shadowTexGen = info->shadowTexGen[i];
 723                     shadowTexGen->setMode(osg::TexGen::EYE_LINEAR);
 724
 725                     osg::Camera* cascadeCam = static_cast<osg::Camera*>( grp->getChild(i) );
 726                     // compute the matrix which takes a vertex from view coords into tex coords
 727                     shadowTexGen->setPlanesFromMatrix(  cascadeCam->getProjectionMatrix() *
 728                                                         osg::Matrix::translate(1.0,1.0,1.0) *
 729                                                         osg::Matrix::scale(0.5f,0.5f,0.5f) );
 730
 731                     osg::RefMatrix * refMatrix = new osg::RefMatrix( cascadeCam->getInverseViewMatrix() * *cv->getModelViewMatrix() );
 732
 733                     cv->getRenderStage()->getPositionalStateContainer()->addPositionedTextureAttribute( i+1, refMatrix, shadowTexGen );
 734                 }
 735             }
 736             // Render saved transparent render bins
 737             osgUtil::RenderStage* renderStage = cv->getRenderStage();
 738             osgUtil::RenderBin::RenderBinList& rbl = renderStage->getRenderBinList();
 739             for (osgUtil::RenderBin::RenderBinList::iterator rbi = info->savedTransparentBins.begin(); rbi != info->savedTransparentBins.end(); ++rbi ){
 740                 rbl.insert( std::make_pair( rbi->first + 10000, rbi->second ) );
 741             }
 742             info->savedTransparentBins.clear();
 743         }
 744     }
 745
 746 private:
 747     std::string kind;
 748     CameraInfo* info;
 749     bool needsDuDv;
 750 };
 751
 752 osg::Texture2D* buildDeferredBuffer(GLint internalFormat, GLenum sourceFormat, GLenum sourceType, GLenum wrapMode, bool shadowComparison = false)
 753 {
 754     osg::Texture2D* tex = new osg::Texture2D;
 755     tex->setResizeNonPowerOfTwoHint( false );
 756     tex->setInternalFormat( internalFormat );
 757     tex->setShadowComparison(shadowComparison);
 758     if (shadowComparison) {
 759         tex->setShadowTextureMode(osg::Texture2D::LUMINANCE);
 760         tex->setBorderColor(osg::Vec4(1.0f,1.0f,1.0f,1.0f));
 761     }
 762     tex->setSourceFormat(sourceFormat);
 763     tex->setSourceType(sourceType);
 764     tex->setFilter( osg::Texture2D::MIN_FILTER, osg::Texture2D::LINEAR );
 765     tex->setFilter( osg::Texture2D::MAG_FILTER, osg::Texture2D::LINEAR );
 766     tex->setWrap( osg::Texture::WRAP_S, (osg::Texture::WrapMode)wrapMode );
 767     tex->setWrap( osg::Texture::WRAP_T, (osg::Texture::WrapMode)wrapMode );
 768         return tex;
 769 }
 770
 771 void attachBufferToCamera( CameraInfo* info, osg::Camera* camera, osg::Camera::BufferComponent c, const std::string& ck, const std::string& bk )
 772 {
 773     camera->attach( c, info->getBuffer(bk) );
 774     info->getRenderStageInfo(ck).buffers.insert( std::make_pair( c, bk ) );
 775 }
 776
 777 void buildAttachments(CameraInfo* info, osg::Camera* camera, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments) {
 778     BOOST_FOREACH(ref_ptr<FGRenderingPipeline::Attachment> attachment, attachments) {
 779         if (attachment->valid())
 780             attachBufferToCamera( info, camera, attachment->component, name, attachment->buffer );
 781     }
 782 }
 783
 784 osg::Camera* FGRenderer::buildDeferredGeometryCamera( CameraInfo* info, osg::GraphicsContext* gc, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments )
 785 {
 786     osg::Camera* camera = new osg::Camera;
 787     info->addCamera(name, camera );
 788
 789     camera->setCullMask( ~simgear::MODELLIGHT_BIT );
 790     camera->setName( "GeometryC" );
 791     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
 792     camera->setGraphicsContext( gc );
 793     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( name, info ) );
 794     camera->setClearMask( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
 795     camera->setClearColor( osg::Vec4( 0., 0., 0., 0. ) );
 796     camera->setClearDepth( 1.0 );
 797     camera->setColorMask(true, true, true, true);
 798     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
 799     camera->setRenderOrder(osg::Camera::NESTED_RENDER, 0);
 800     camera->setViewport( new osg::Viewport );
 801     buildAttachments(info, camera, name, attachments);
 802     camera->setDrawBuffer(GL_FRONT);
 803     camera->setReadBuffer(GL_FRONT);
 804
 805     osg::StateSet* ss = camera->getOrCreateStateSet();
 806     ss->addUniform( _depthInColor );
 807
 808     camera->addChild( mDeferredRealRoot.get() );
 809
 810     return camera;
 811 }
 812
 813 static void setShadowCascadeStateSet( osg::Camera* cam ) {
 814     osg::StateSet* ss = cam->getOrCreateStateSet();
 815     ss->setAttribute( new osg::PolygonOffset( 1.1f, 5.0f ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 816     ss->setMode( GL_POLYGON_OFFSET_FILL, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 817     ss->setRenderBinDetails( 0, "RenderBin", osg::StateSet::OVERRIDE_RENDERBIN_DETAILS );
 818     ss->setAttributeAndModes( new osg::AlphaFunc( osg::AlphaFunc::GREATER, 0.05 ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 819     ss->setAttributeAndModes( new osg::ColorMask( false, false, false, false ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 820     ss->setAttributeAndModes( new osg::CullFace( osg::CullFace::FRONT ), osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE );
 821     osg::Program* program = new osg::Program;
 822     ss->setAttribute( program, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON );
 823     ss->setMode( GL_LIGHTING, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 824     ss->setMode( GL_BLEND, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 825     //ss->setTextureMode( 0, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::ON );
 826     ss->setTextureMode( 0, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 827     ss->setTextureMode( 1, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 828     ss->setTextureMode( 1, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 829     ss->setTextureMode( 2, GL_TEXTURE_2D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 830     ss->setTextureMode( 2, GL_TEXTURE_3D, osg::StateAttribute::OVERRIDE | osg::StateAttribute::OFF );
 831 }
 832
 833 static osg::Camera* createShadowCascadeCamera( int no, int cascadeSize ) {
 834     osg::Camera* cascadeCam = new osg::Camera;
 835     setShadowCascadeStateSet( cascadeCam );
 836
 837     std::ostringstream oss;
 838     oss << "CascadeCamera" << (no + 1);
 839     cascadeCam->setName( oss.str() );
 840     cascadeCam->setClearMask(0);
 841     cascadeCam->setCullMask(~( simgear::MODELLIGHT_BIT /* | simgear::NO_SHADOW_BIT */ ) );
 842     cascadeCam->setCullingMode( cascadeCam->getCullingMode() | osg::CullSettings::SMALL_FEATURE_CULLING );
 843     cascadeCam->setAllowEventFocus(false);
 844     cascadeCam->setReferenceFrame(osg::Transform::ABSOLUTE_RF_INHERIT_VIEWPOINT);
 845     cascadeCam->setRenderOrder(osg::Camera::NESTED_RENDER);
 846     cascadeCam->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 847     cascadeCam->setViewport( int( no / 2 ) * cascadeSize, (no & 1) * cascadeSize, cascadeSize, cascadeSize );
 848     return cascadeCam;
 849 }
 850
 851 osg::Camera* FGRenderer::buildDeferredShadowCamera( CameraInfo* info, osg::GraphicsContext* gc, const std::string& name, const std::vector<ref_ptr<FGRenderingPipeline::Attachment> > &attachments )
 852 {
 853     osg::Camera* mainShadowCamera = new osg::Camera;
 854     info->addCamera(name, mainShadowCamera, 0.0f );
 855
 856     mainShadowCamera->setName( "ShadowC" );
 857     mainShadowCamera->setClearMask( GL_DEPTH_BUFFER_BIT );
 858     mainShadowCamera->setClearDepth( 1.0 );
 859     mainShadowCamera->setAllowEventFocus(false);
 860     mainShadowCamera->setGraphicsContext(gc);
 861     mainShadowCamera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
 862     buildAttachments(info, mainShadowCamera, name, attachments);
 863     mainShadowCamera->setComputeNearFarMode(osg::Camera::DO_NOT_COMPUTE_NEAR_FAR);
 864     mainShadowCamera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
 865     mainShadowCamera->setProjectionMatrix(osg::Matrix::identity());
 866     mainShadowCamera->setCullingMode( osg::CullSettings::NO_CULLING );
 867     mainShadowCamera->setViewport( 0, 0, _shadowMapSize, _shadowMapSize );
 868     mainShadowCamera->setDrawBuffer(GL_FRONT);
 869     mainShadowCamera->setReadBuffer(GL_FRONT);
 870     mainShadowCamera->setRenderOrder(Camera::NESTED_RENDER, 1);
 871
 872     osg::Switch* shadowSwitch = new osg::Switch;
 873     mainShadowCamera->addChild( shadowSwitch );
 874
 875     for (int i = 0; i < 4; ++i ) {
 876         osg::Camera* cascadeCam = createShadowCascadeCamera( i, _shadowMapSize/2 );
 877         cascadeCam->addChild( mDeferredRealRoot.get() );
 878         shadowSwitch->addChild( cascadeCam );
 879         info->shadowTexGen[i] = new osg::TexGen;
 880     }
 881     if (fgGetBool("/sim/rendering/shadows/enabled", true))
 882         shadowSwitch->setAllChildrenOn();
 883     else
 884         shadowSwitch->setAllChildrenOff();
 885
 886     return mainShadowCamera;
 887 }
 888
 889 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)
 890 {
 891     osg::Camera* cascade = static_cast<osg::Camera*>( grp->getChild(idx) );
 892     osg::Matrixd &viewMatrix = cascade->getViewMatrix();
 893     osg::Matrixd &projectionMatrix = cascade->getProjectionMatrix();
 894
 895     osg::BoundingSphere bs;
 896     bs.expandBy(osg::Vec3(left,bottom,-zNear) * f1);
 897     bs.expandBy(osg::Vec3(right,top,-zNear) * f2);
 898     bs.expandBy(osg::Vec3(left,bottom,-zNear) * f2);
 899     bs.expandBy(osg::Vec3(right,top,-zNear) * f1);
 900
 901     osg::Vec4 aim = osg::Vec4(bs.center(), 1.0) * camera->getInverseViewMatrix();
 902
 903     projectionMatrix.makeOrtho( -bs.radius(), bs.radius(), -bs.radius(), bs.radius(), 1., 15000.0 );
 904     osg::Vec3 position( aim.x(), aim.y(), aim.z() );
 905     viewMatrix.makeLookAt( position + (getSunDirection() * 10000.0), position, position );
 906 }
 907
 908 osg::Vec3 FGRenderer::getSunDirection() const
 909 {
 910     osg::Vec3 val;
 911     _sunDirection->get( val );
 912     return val;
 913 }
 914
 915 void FGRenderer::updateShadowCamera(const CameraInfo* info, const osg::Vec3d& position)
 916 {
 917     ref_ptr<Camera> mainShadowCamera = info->getCamera( SHADOW_CAMERA );
 918     if (mainShadowCamera.valid()) {
 919         ref_ptr<Switch> shadowSwitch = mainShadowCamera->getChild( 0 )->asSwitch();
 920         osg::Vec3d up = position,
 921             dir = getSunDirection();
 922         up.normalize();
 923         dir.normalize();
 924         // cos(100 deg) == -0.17
 925         if (up * dir < -0.17 || !fgGetBool("/sim/rendering/shadows/enabled", true)) {
 926             shadowSwitch->setAllChildrenOff();
 927         } else {
 928             double left,right,bottom,top,zNear,zFar;
 929             ref_ptr<Camera> camera = info->getCamera(GEOMETRY_CAMERA);
 930             camera->getProjectionMatrix().getFrustum(left,right,bottom,top,zNear,zFar);
 931
 932             shadowSwitch->setAllChildrenOn();
 933             if (_numCascades == 1) {
 934                 osg::Camera* cascadeCam = static_cast<osg::Camera*>( shadowSwitch->getChild(0) );
 935                 cascadeCam->setViewport( 0, 0, _shadowMapSize, _shadowMapSize );
 936             } else {
 937                 for (int no = 0; no < 4; ++no) {
 938                     osg::Camera* cascadeCam = static_cast<osg::Camera*>( shadowSwitch->getChild(no) );
 939                     cascadeCam->setViewport( int( no / 2 ) * (_shadowMapSize/2), (no & 1) * (_shadowMapSize/2), (_shadowMapSize/2), (_shadowMapSize/2) );
 940                 }
 941             }
 942             updateShadowCascade(info, camera, shadowSwitch, 0, left, right, bottom, top, zNear, 1.0, _cascadeFar[0]/zNear);
 943             if (_numCascades > 1) {
 944                 shadowSwitch->setValue(1, true);
 945                 updateShadowCascade(info, camera, shadowSwitch, 1, left, right, bottom, top, zNear, _cascadeFar[0]/zNear, _cascadeFar[1]/zNear);
 946             } else {
 947                 shadowSwitch->setValue(1, false);
 948             }
 949             if (_numCascades > 2) {
 950                 shadowSwitch->setValue(2, true);
 951                 updateShadowCascade(info, camera, shadowSwitch, 2, left, right, bottom, top, zNear, _cascadeFar[1]/zNear, _cascadeFar[2]/zNear);
 952             } else {
 953                 shadowSwitch->setValue(2, false);
 954             }
 955             if (_numCascades > 3) {
 956                 shadowSwitch->setValue(3, true);
 957                 updateShadowCascade(info, camera, shadowSwitch, 3, left, right, bottom, top, zNear, _cascadeFar[2]/zNear, _cascadeFar[3]/zNear);
 958             } else {
 959                 shadowSwitch->setValue(3, false);
 960             }
 961             {
 962             osg::Matrixd &viewMatrix = mainShadowCamera->getViewMatrix();
 963
 964             osg::Vec4 aim = osg::Vec4( 0.0, 0.0, 0.0, 1.0 ) * camera->getInverseViewMatrix();
 965
 966             osg::Vec3 position( aim.x(), aim.y(), aim.z() );
 967             viewMatrix.makeLookAt( position, position + (getSunDirection() * 10000.0), position );
 968             }
 969         }
 970     }
 971 }
 972
 973 void FGRenderer::updateShadowMapSize(int mapSize)
 974 {
 975     if ( ((~( mapSize-1 )) & mapSize) != mapSize ) {
 976         SG_LOG( SG_VIEW, SG_ALERT, "Map size is not a power of two" );
 977         return;
 978     }
 979     for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
 980             ii != CameraGroup::getDefault()->camerasEnd();
 981             ++ii )
 982     {
 983         CameraInfo* info = ii->get();
 984         Camera* camera = info->getCamera(SHADOW_CAMERA);
 985         if (camera == 0) continue;
 986
 987         Texture2D* tex = info->getBuffer("shadow");
 988         if (tex == 0) continue;
 989
 990         tex->setTextureSize( mapSize, mapSize );
 991         tex->dirtyTextureObject();
 992
 993         Viewport* vp = camera->getViewport();
 994         vp->width() = mapSize;
 995         vp->height() = mapSize;
 996
 997         osgViewer::Renderer* renderer
 998             = static_cast<osgViewer::Renderer*>(camera->getRenderer());
 999         for (int i = 0; i < 2; ++i) {
1000             osgUtil::SceneView* sceneView = renderer->getSceneView(i);
1001             sceneView->getRenderStage()->setFrameBufferObject(0);
1002             sceneView->getRenderStage()->setCameraRequiresSetUp(true);
1003             if (sceneView->getRenderStageLeft()) {
1004                 sceneView->getRenderStageLeft()->setFrameBufferObject(0);
1005                 sceneView->getRenderStageLeft()->setCameraRequiresSetUp(true);
1006             }
1007             if (sceneView->getRenderStageRight()) {
1008                 sceneView->getRenderStageRight()->setFrameBufferObject(0);
1009                 sceneView->getRenderStageRight()->setCameraRequiresSetUp(true);
1010             }
1011         }
1012
1013         int cascadeSize = mapSize / 2;
1014         Group* grp = camera->getChild(0)->asGroup();
1015         for (int i = 0; i < 4; ++i ) {
1016             Camera* cascadeCam = static_cast<Camera*>( grp->getChild(i) );
1017             cascadeCam->setViewport( int( i / 2 ) * cascadeSize, (i & 1) * cascadeSize, cascadeSize, cascadeSize );
1018         }
1019
1020         _shadowMapSize = mapSize;
1021     }
1022 }
1023
1024 void FGRenderer::enableShadows(bool enabled)
1025 {
1026     for (   CameraGroup::CameraIterator ii = CameraGroup::getDefault()->camerasBegin();
1027             ii != CameraGroup::getDefault()->camerasEnd();
1028             ++ii )
1029     {
1030         CameraInfo* info = ii->get();
1031         Camera* camera = info->getCamera(SHADOW_CAMERA);
1032         if (camera == 0) continue;
1033
1034         osg::Switch* shadowSwitch = camera->getChild(0)->asSwitch();
1035         if (enabled)
1036             shadowSwitch->setAllChildrenOn();
1037         else
1038             shadowSwitch->setAllChildrenOff();
1039     }
1040 }
1041
1042 void FGRenderer::updateCascadeFar(int index, float far_m)
1043 {
1044     if (index < 0 || index > 3)
1045         return;
1046     _cascadeFar[index] = far_m;
1047     _shadowDistances->set( osg::Vec4f(_cascadeFar[0], _cascadeFar[1], _cascadeFar[2], _cascadeFar[3]) );
1048 }
1049
1050 void FGRenderer::updateCascadeNumber(size_t num)
1051 {
1052     if (num < 1 || num > 4)
1053         return;
1054     _numCascades = num;
1055     _shadowNumber->set( (int)_numCascades );
1056 }
1057
1058 osg::Camera*
1059 FGRenderer::buildDeferredLightingCamera( flightgear::CameraInfo* info, osg::GraphicsContext* gc, const FGRenderingPipeline::Stage* stage )
1060 {
1061     osg::Camera* camera = new osg::Camera;
1062     info->addCamera(stage->name, camera );
1063
1064     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( stage->name, info ) );
1065     camera->setAllowEventFocus(false);
1066     camera->setGraphicsContext(gc);
1067     camera->setViewport(new Viewport);
1068     camera->setName(stage->name+"C");
1069     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1070     camera->setRenderOrder(osg::Camera::NESTED_RENDER, stage->orderNum);
1071     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1072     camera->setViewport( new osg::Viewport );
1073     buildAttachments(info, camera, stage->name, stage->attachments);
1074     camera->setDrawBuffer(GL_FRONT);
1075     camera->setReadBuffer(GL_FRONT);
1076     camera->setClearColor( osg::Vec4( 0., 0., 0., 1. ) );
1077     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1078     osg::StateSet* ss = camera->getOrCreateStateSet();
1079     ss->setAttribute( new osg::Depth(osg::Depth::LESS, 0.0, 1.0, false) );
1080     ss->addUniform( _depthInColor );
1081
1082     osg::Group* lightingGroup = new osg::Group;
1083
1084     BOOST_FOREACH( osg::ref_ptr<FGRenderingPipeline::Pass> pass, stage->passes ) {
1085         ref_ptr<Node> node = buildPass(info, pass);
1086         if (node.valid())
1087             lightingGroup->addChild(node);
1088     }
1089
1090     camera->addChild( lightingGroup );
1091
1092     return camera;
1093 }
1094
1095 CameraInfo*
1096 FGRenderer::buildDeferredPipeline(CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
1097                                     const osg::Matrix& view,
1098                                     const osg::Matrix& projection,
1099                                     osg::GraphicsContext* gc)
1100 {
1101     return buildCameraFromRenderingPipeline(_pipeline, cgroup, flags, camera, view, projection, gc);
1102 }
1103
1104 osg::Camera*
1105 FGRenderer::buildDeferredFullscreenCamera( flightgear::CameraInfo* info, const FGRenderingPipeline::Pass* pass )
1106 {
1107     osg::Camera* camera = new osg::Camera;
1108
1109     camera->setClearMask( 0 );
1110     camera->setAllowEventFocus(false);
1111     camera->setName(pass->name+"C");
1112     camera->setReferenceFrame(osg::Transform::ABSOLUTE_RF);
1113     camera->setRenderOrder(osg::Camera::NESTED_RENDER, pass->orderNum);
1114     camera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1115     camera->setViewMatrix(osg::Matrix::identity());
1116     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1117
1118     osg::StateSet* ss = camera->getOrCreateStateSet();
1119     ss->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1120     ss->addUniform( info->projInverse );
1121     ss->addUniform( info->viewInverse );
1122     ss->addUniform( info->view );
1123     ss->addUniform( info->bufferSize );
1124     ss->addUniform( info->worldPosCart );
1125     ss->addUniform( info->worldPosGeod );
1126     ss->addUniform( _ambientFactor );
1127     ss->addUniform( _sunDiffuse );
1128     ss->addUniform( _sunSpecular );
1129     ss->addUniform( _sunDirection );
1130     ss->addUniform( _planes );
1131     ss->addUniform( _shadowNumber );
1132     ss->addUniform( _shadowDistances );
1133     ss->addUniform( _fogColor );
1134     ss->addUniform( _fogDensity );
1135     ss->addUniform( _planes );
1136
1137     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1138     g->setUseDisplayList(false);
1139     simgear::EffectGeode* eg = new simgear::EffectGeode;
1140     simgear::Effect* effect = simgear::makeEffect(pass->effect, true);
1141     if (effect) {
1142         eg->setEffect( effect );
1143     }
1144
1145     eg->setName(pass->name+"Quad");
1146     eg->setCullingActive(false);
1147     eg->addDrawable(g);
1148     camera->addChild(eg);
1149
1150     return camera;
1151 }
1152
1153 osg::Camera*
1154 FGRenderer::buildDeferredFullscreenCamera( flightgear::CameraInfo* info, osg::GraphicsContext* gc, const FGRenderingPipeline::Stage* stage )
1155 {
1156     osg::Camera* camera = buildDeferredFullscreenCamera(info, static_cast<const FGRenderingPipeline::Pass*>(stage));
1157     info->addCamera(stage->name, camera, stage->scaleFactor, true);
1158
1159     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback(stage->name, info, stage->needsDuDv) );
1160     camera->setGraphicsContext(gc);
1161     camera->setViewport(new Viewport);
1162     camera->setRenderTargetImplementation( osg::Camera::FRAME_BUFFER_OBJECT );
1163     buildAttachments(info, camera, stage->name, stage->attachments);
1164     camera->setDrawBuffer(GL_FRONT);
1165     camera->setReadBuffer(GL_FRONT);
1166     camera->setClearColor( osg::Vec4( 1., 1., 1., 1. ) );
1167     camera->setClearMask( GL_COLOR_BUFFER_BIT );
1168     camera->setViewMatrix(osg::Matrix::identity());
1169     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1170
1171     osg::StateSet* ss = camera->getOrCreateStateSet();
1172     if (stage->needsDuDv) {
1173         ss->addUniform( info->du );
1174         ss->addUniform( info->dv );
1175     }
1176
1177     return camera;
1178 }
1179
1180 void
1181 FGRenderer::buildDeferredDisplayCamera( osg::Camera* camera, flightgear::CameraInfo* info, const std::string& name, osg::GraphicsContext* gc )
1182 {
1183     camera->setName( "DisplayC" );
1184     camera->setCullCallback( new FGDeferredRenderingCameraCullCallback( name, info ) );
1185     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
1186     camera->setAllowEventFocus(false);
1187     osg::Geometry* g = osg::createTexturedQuadGeometry( osg::Vec3(-1.,-1.,0.), osg::Vec3(2.,0.,0.), osg::Vec3(0.,2.,0.) );
1188     g->setUseDisplayList(false); //DEBUG
1189     simgear::EffectGeode* eg = new simgear::EffectGeode;
1190     simgear::Effect* effect = simgear::makeEffect("Effects/display", true);
1191     if (!effect) {
1192         SG_LOG(SG_VIEW, SG_ALERT, "Effects/display not found");
1193         return;
1194     }
1195     eg->setEffect(effect);
1196     eg->setCullingActive(false);
1197     eg->addDrawable(g);
1198     camera->setViewMatrix(osg::Matrix::identity());
1199     camera->setProjectionMatrixAsOrtho2D(-1,1,-1,1);
1200     camera->addChild(eg);
1201
1202     osg::StateSet* ss = camera->getOrCreateStateSet();
1203     ss->addUniform( _depthInColor );
1204 }
1205
1206 void
1207 FGRenderer::buildStage(CameraInfo* info,
1208                         FGRenderingPipeline::Stage* stage,
1209                         CameraGroup* cgroup,
1210                         osg::Camera* mainCamera,
1211                         const osg::Matrix& view, const osg::Matrix& projection, osg::GraphicsContext* gc)
1212 {
1213     if (!stage->valid())
1214         return;
1215
1216     ref_ptr<Camera> camera;
1217     bool needOffsets = false;
1218     if (stage->type == "geometry") {
1219         camera = buildDeferredGeometryCamera(info, gc, stage->name, stage->attachments);
1220         needOffsets = true;
1221     } else if (stage->type == "lighting") {
1222         camera = buildDeferredLightingCamera(info, gc, stage);
1223         needOffsets = true;
1224     } else if (stage->type == "shadow")
1225         camera = buildDeferredShadowCamera(info, gc, stage->name, stage->attachments);
1226     else if (stage->type == "fullscreen")
1227         camera = buildDeferredFullscreenCamera(info, gc, stage);
1228     else if (stage->type == "display") {
1229         camera = mainCamera;
1230         buildDeferredDisplayCamera(camera, info, stage->name, gc);
1231     } else
1232         throw sg_exception("Stage type is not supported");
1233
1234     if (needOffsets)
1235         cgroup->getViewer()->addSlave(camera, projection, view, false);
1236     else
1237         cgroup->getViewer()->addSlave(camera, false);
1238     installCullVisitor(camera);
1239     int slaveIndex = cgroup->getViewer()->getNumSlaves() - 1;
1240     if (stage->type == "display")
1241         info->addCamera( stage->type, camera, slaveIndex, true );
1242     info->getRenderStageInfo(stage->name).slaveIndex = slaveIndex;
1243 }
1244
1245 osg::Node*
1246 FGRenderer::buildLightingSkyCloudsPass(FGRenderingPipeline::Pass* pass)
1247 {
1248     Group* group = new Group;
1249     group->addChild( _sky->getPreRoot() );
1250     group->addChild( _sky->getCloudRoot() );
1251     return group;
1252 }
1253
1254 osg::Node*
1255 FGRenderer::buildLightingLightsPass(CameraInfo* info, FGRenderingPipeline::Pass* pass)
1256 {
1257     osg::Camera* lightCam = new osg::Camera;
1258     StateSet* ss = lightCam->getOrCreateStateSet();
1259     ss->addUniform( _planes );
1260     ss->addUniform( info->bufferSize );
1261     lightCam->setName( "LightCamera" );
1262     lightCam->setClearMask(0);
1263     lightCam->setAllowEventFocus(false);
1264     lightCam->setReferenceFrame(osg::Transform::RELATIVE_RF);
1265     lightCam->setRenderOrder(osg::Camera::NESTED_RENDER,pass->orderNum);
1266     lightCam->setViewMatrix(osg::Matrix::identity());
1267     lightCam->setProjectionMatrix(osg::Matrix::identity());
1268     lightCam->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1269     lightCam->setCullMask( simgear::MODELLIGHT_BIT );
1270     lightCam->setInheritanceMask( osg::CullSettings::ALL_VARIABLES & ~osg::CullSettings::CULL_MASK );
1271     lightCam->addChild( mDeferredRealRoot.get() );
1272
1273     return lightCam;
1274 }
1275
1276 osg::Node*
1277 FGRenderer::buildPass(CameraInfo* info, FGRenderingPipeline::Pass* pass)
1278 {
1279     if (!pass->valid())
1280         return 0;
1281
1282     ref_ptr<Node> node;
1283     if (pass->type == "sky-clouds")
1284         node = buildLightingSkyCloudsPass(pass);
1285     else if (pass->type == "fullscreen")
1286         node = buildDeferredFullscreenCamera(info, pass);
1287     else if (pass->type == "lights")
1288         node = buildLightingLightsPass(info, pass);
1289     else
1290         throw sg_exception("Pass type is not supported");
1291
1292     return node.release();
1293 }
1294
1295 void
1296 FGRenderer::buildBuffers(FGRenderingPipeline* rpipe, CameraInfo* info)
1297 {
1298     for (size_t i = 0; i < rpipe->buffers.size(); ++i) {
1299         osg::ref_ptr<FGRenderingPipeline::Buffer> buffer = rpipe->buffers[i];
1300         if (buffer->valid()) {
1301             bool fullscreen = buffer->width == -1 && buffer->height == -1;
1302             info->addBuffer(buffer->name, buildDeferredBuffer( buffer->internalFormat,
1303                                                                 buffer->sourceFormat,
1304                                                                 buffer->sourceType,
1305                                                                 buffer->wrapMode,
1306                                                                 buffer->shadowComparison),
1307                             fullscreen ? buffer->scaleFactor : 0.0f);
1308             if (!fullscreen) {
1309                 info->getBuffer(buffer->name)->setTextureSize(buffer->width, buffer->height);
1310             }
1311         }
1312     }
1313 }
1314
1315 CameraInfo* FGRenderer::buildCameraFromRenderingPipeline(FGRenderingPipeline* rpipe, CameraGroup* cgroup, unsigned flags, osg::Camera* camera,
1316                                     const osg::Matrix& view, const osg::Matrix& projection, osg::GraphicsContext* gc)
1317 {
1318     CameraInfo* info = new CameraInfo(flags);
1319     buildBuffers(rpipe, info);
1320
1321     for (size_t i = 0; i < rpipe->stages.size(); ++i) {
1322         osg::ref_ptr<FGRenderingPipeline::Stage> stage = rpipe->stages[i];
1323         buildStage(info, stage, cgroup, camera, view, projection, gc);
1324     }
1325
1326     cgroup->addCamera(info);
1327
1328     return info;
1329 }
1330
1331 void
1332 FGRenderer::setupView( void )
1333 {
1334     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1335     osg::initNotifyLevel();
1336
1337     // The number of polygon-offset "units" to place between layers.  In
1338     // principle, one is supposed to be enough.  In practice, I find that
1339     // my hardware/driver requires many more.
1340     osg::PolygonOffset::setUnitsMultiplier(1);
1341     osg::PolygonOffset::setFactorMultiplier(1);
1342
1343     // Go full screen if requested ...
1344     if ( fgGetBool("/sim/startup/fullscreen") )
1345         fgOSFullScreen();
1346
1347 // build the sky
1348     // The sun and moon diameters are scaled down numbers of the
1349     // actual diameters. This was needed to fit both the sun and the
1350     // moon within the distance to the far clip plane.
1351     // Moon diameter:    3,476 kilometers
1352     // Sun diameter: 1,390,000 kilometers
1353     _sky->build( 80000.0, 80000.0,
1354                   463.3, 361.8,
1355                   *globals->get_ephem(),
1356                   fgGetNode("/environment", true));
1357
1358     viewer->getCamera()
1359         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1360
1361     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
1362
1363     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
1364
1365     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
1366     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
1367
1368     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
1369     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
1370     stateSet->setAttribute(new osg::BlendFunc);
1371     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
1372
1373     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
1374
1375     // this will be set below
1376     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
1377
1378     osg::Material* material = new osg::Material;
1379     stateSet->setAttribute(material);
1380
1381     stateSet->setTextureAttribute(0, new osg::TexEnv);
1382     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
1383
1384     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
1385     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
1386     stateSet->setAttribute(hint);
1387     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
1388     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
1389     stateSet->setAttribute(hint);
1390     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
1391     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
1392     stateSet->setAttribute(hint);
1393     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
1394     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
1395     stateSet->setAttribute(hint);
1396     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
1397     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
1398     stateSet->setAttribute(hint);
1399
1400     osg::Group* sceneGroup = new osg::Group;
1401     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
1402     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
1403
1404     //sceneGroup->addChild(thesky->getCloudRoot());
1405
1406     stateSet = sceneGroup->getOrCreateStateSet();
1407     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
1408
1409     // need to update the light on every frame
1410     // OSG LightSource objects are rather confusing. OSG only supports
1411     // the 10 lights specified by OpenGL itself; if more than one
1412     // LightSource in the scene graph have the same light number, it's
1413     // indeterminate which values will be used to render geometry that
1414     // has that light number enabled. Also, adding children to a
1415     // LightSource is just a shortcut for setting up a state set that
1416     // has the corresponding OpenGL light enabled: a LightSource will
1417     // affect geometry anywhere in the scene graph that has its light
1418     // number enabled in a state set.
1419     LightSource* lightSource = new LightSource;
1420     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
1421     // relative because of CameraView being just a clever transform node
1422     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
1423     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
1424     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
1425     mRealRoot->addChild(lightSource);
1426     // we need a white diffuse light for the phase of the moon
1427     osg::LightSource* sunLight = new osg::LightSource;
1428     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
1429     sunLight->getLight()->setLightNum(1);
1430     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
1431     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
1432     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
1433
1434     // Hang a StateSet above the sky subgraph in order to turn off
1435     // light 0
1436     Group* skyGroup = new Group;
1437     StateSet* skySS = skyGroup->getOrCreateStateSet();
1438     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
1439     skyGroup->addChild(_sky->getPreRoot());
1440     sunLight->addChild(skyGroup);
1441     mRoot->addChild(sceneGroup);
1442     if ( _classicalRenderer )
1443         mRoot->addChild(sunLight);
1444
1445     // Clouds are added to the scene graph later
1446     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
1447     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
1448     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
1449     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
1450
1451     // enable disable specular highlights.
1452     // is the place where we might plug in an other fragment shader ...
1453     osg::LightModel* lightModel = new osg::LightModel;
1454     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
1455     stateSet->setAttribute(lightModel);
1456
1457     // switch to enable wireframe
1458     osg::PolygonMode* polygonMode = new osg::PolygonMode;
1459     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
1460     stateSet->setAttributeAndModes(polygonMode);
1461
1462     // scene fog handling
1463     osg::Fog* fog = new osg::Fog;
1464     fog->setUpdateCallback(new FGFogUpdateCallback);
1465     stateSet->setAttributeAndModes(fog);
1466     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
1467
1468     // plug in the GUI
1469     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
1470     if (guiCamera) {
1471
1472         osg::Geode* geode = new osg::Geode;
1473         geode->addDrawable(new SGPuDrawable);
1474         geode->addDrawable(new SGHUDDrawable);
1475         guiCamera->addChild(geode);
1476
1477
1478       guiCamera->addChild(FGPanelNode::create2DPanelNode());
1479     }
1480
1481     osg::Switch* sw = new osg::Switch;
1482     sw->setUpdateCallback(new FGScenerySwitchCallback);
1483     sw->addChild(mRoot.get());
1484     mRealRoot->addChild(sw);
1485     // The clouds are attached directly to the scene graph root
1486     // because, in theory, they don't want the same default state set
1487     // as the rest of the scene. This may not be true in practice.
1488         if ( _classicalRenderer ) {
1489                 mRealRoot->addChild(_sky->getCloudRoot());
1490                 mRealRoot->addChild(FGCreateRedoutNode());
1491         }
1492     // Attach empty program to the scene root so that shader programs
1493     // don't leak into state sets (effects) that shouldn't have one.
1494     stateSet = mRealRoot->getOrCreateStateSet();
1495     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
1496
1497         mDeferredRealRoot->addChild( mRealRoot.get() );
1498 }
1499
1500 // Update all Visuals (redraws anything graphics related)
1501 void
1502 FGRenderer::update( ) {
1503     if (!(_scenery_loaded->getBoolValue() ||
1504            _scenery_override->getBoolValue()))
1505     {
1506         _splash_alpha->setDoubleValue(1.0);
1507         return;
1508     }
1509     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
1510
1511     if (_splash_alpha->getDoubleValue()>0.0)
1512     {
1513         // Fade out the splash screen
1514         const double fade_time = 0.5;
1515         const double fade_steps_per_sec = 10;
1516         double delay_time = SGMiscd::min(fade_time/fade_steps_per_sec,
1517                                          (SGTimeStamp::now() - _splash_time).toSecs());
1518         _splash_time = SGTimeStamp::now();
1519         double sAlpha = _splash_alpha->getDoubleValue();
1520         sAlpha -= SGMiscd::max(0.0,delay_time/fade_time);
1521         FGScenerySwitchCallback::scenery_enabled = (sAlpha<1.0);
1522         _splash_alpha->setDoubleValue((sAlpha < 0) ? 0.0 : sAlpha);
1523     }
1524
1525     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
1526         if (!_classicalRenderer ) {
1527                 _ambientFactor->set( toOsg(l->scene_ambient()) );
1528                 _sunDiffuse->set( toOsg(l->scene_diffuse()) );
1529                 _sunSpecular->set( toOsg(l->scene_specular()) );
1530                 _sunDirection->set( osg::Vec3f(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]) );
1531         }
1532
1533     // update fog params
1534     double actual_visibility;
1535     if (_cloud_status->getBoolValue()) {
1536         actual_visibility = _sky->get_visibility();
1537     } else {
1538         actual_visibility = _visibility_m->getDoubleValue();
1539     }
1540
1541     // idle_state is now 1000 meaning we've finished all our
1542     // initializations and are running the main loop, so this will
1543     // now work without seg faulting the system.
1544
1545     FGViewer *current__view = globals->get_current_view();
1546     // Force update of center dependent values ...
1547     current__view->set_dirty();
1548
1549     osg::Camera *camera = viewer->getCamera();
1550
1551     bool skyblend = _skyblend->getBoolValue();
1552     if ( skyblend ) {
1553
1554         if ( _textures->getBoolValue() ) {
1555             SGVec4f clearColor(l->adj_fog_color());
1556             camera->setClearColor(toOsg(clearColor));
1557         }
1558     } else {
1559         SGVec4f clearColor(l->sky_color());
1560         camera->setClearColor(toOsg(clearColor));
1561     }
1562
1563     // update fog params if visibility has changed
1564     double visibility_meters = _visibility_m->getDoubleValue();
1565     _sky->set_visibility(visibility_meters);
1566
1567     double altitude_m = _altitude_ft->getDoubleValue() * SG_FEET_TO_METER;
1568     _sky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
1569
1570     // update the sky dome
1571     if ( skyblend ) {
1572
1573         // The sun and moon distances are scaled down versions
1574         // of the actual distance to get both the moon and the sun
1575         // within the range of the far clip plane.
1576         // Moon distance:    384,467 kilometers
1577         // Sun distance: 150,000,000 kilometers
1578
1579         double sun_horiz_eff, moon_horiz_eff;
1580         if (_horizon_effect->getBoolValue()) {
1581             sun_horiz_eff
1582                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
1583                                              0.0),
1584                              0.33) / 3.0;
1585             moon_horiz_eff
1586                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
1587                                              0.0),
1588                              0.33)/3.0;
1589         } else {
1590            sun_horiz_eff = moon_horiz_eff = 1.0;
1591         }
1592
1593         SGSkyState sstate;
1594         sstate.pos       = current__view->getViewPosition();
1595         sstate.pos_geod  = current__view->getPosition();
1596         sstate.ori       = current__view->getViewOrientation();
1597         sstate.spin      = l->get_sun_rotation();
1598         sstate.gst       = globals->get_time_params()->getGst();
1599         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
1600         sstate.moon_dist = 40000.0 * moon_horiz_eff;
1601         sstate.sun_angle = l->get_sun_angle();
1602
1603         SGSkyColor scolor;
1604         scolor.sky_color   = SGVec3f(l->sky_color().data());
1605         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
1606         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
1607         scolor.cloud_color = SGVec3f(l->cloud_color().data());
1608         scolor.sun_angle   = l->get_sun_angle();
1609         scolor.moon_angle  = l->get_moon_angle();
1610
1611         double delta_time_sec = _sim_delta_sec->getDoubleValue();
1612         _sky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
1613         _sky->repaint( scolor, *globals->get_ephem() );
1614
1615             //OSGFIXME
1616 //         shadows->setupShadows(
1617 //           current__view->getLongitude_deg(),
1618 //           current__view->getLatitude_deg(),
1619 //           globals->get_time_params()->getGst(),
1620 //           globals->get_ephem()->getSunRightAscension(),
1621 //           globals->get_ephem()->getSunDeclination(),
1622 //           l->get_sun_angle());
1623
1624     }
1625
1626 //     sgEnviro.setLight(l->adj_fog_color());
1627 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
1628 //         current__view->get_world_up(),
1629 //         current__view->getLongitude_deg(),
1630 //         current__view->getLatitude_deg(),
1631 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
1632 //         delta_time_sec);
1633
1634     // OSGFIXME
1635 //     sgEnviro.drawLightning();
1636
1637 //        double current_view_origin_airspeed_horiz_kt =
1638 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
1639 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
1640 //                                * SGD_DEGREES_TO_RADIANS);
1641
1642     // OSGFIXME
1643 //     if( is_internal )
1644 //         shadows->endOfFrame();
1645
1646     // need to call the update visitor once
1647     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
1648     mUpdateVisitor->setViewData(current__view->getViewPosition(),
1649                                 current__view->getViewOrientation());
1650     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
1651     mUpdateVisitor->setLight(direction, l->scene_ambient(),
1652                              l->scene_diffuse(), l->scene_specular(),
1653                              l->adj_fog_color(),
1654                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
1655     mUpdateVisitor->setVisibility(actual_visibility);
1656     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
1657     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
1658     cullMask |= simgear::GroundLightManager::instance()
1659         ->getLightNodeMask(mUpdateVisitor.get());
1660     if (_panel_hotspots->getBoolValue())
1661         cullMask |= simgear::PICK_BIT;
1662     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
1663         if ( !_classicalRenderer ) {
1664                 _fogColor->set( toOsg( l->adj_fog_color() ) );
1665                 _fogDensity->set( float( mUpdateVisitor->getFogExp2Density() ) );
1666         }
1667 }
1668
1669 void
1670 FGRenderer::resize( int width, int height )
1671 {
1672     int curWidth = _xsize->getIntValue(),
1673         curHeight = _ysize->getIntValue();
1674     SG_LOG(SG_VIEW, SG_DEBUG, "FGRenderer::resize: new size " << width << " x " << height);
1675     if ((curHeight != height) || (curWidth != width)) {
1676     // must guard setting these, or PLIB-PUI fails with too many live interfaces
1677         _xsize->setIntValue(width);
1678         _ysize->setIntValue(height);
1679     }
1680 }
1681
1682 bool
1683 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
1684                  const osgGA::GUIEventAdapter* ea)
1685 {
1686     // wipe out the return ...
1687     pickList.clear();
1688     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
1689     Intersections intersections;
1690
1691     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
1692         return false;
1693     for (Intersections::iterator hit = intersections.begin(),
1694              e = intersections.end();
1695          hit != e;
1696          ++hit) {
1697         const osg::NodePath& np = hit->nodePath;
1698         osg::NodePath::const_reverse_iterator npi;
1699         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1700             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1701             if (!ud)
1702                 continue;
1703             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1704                 SGPickCallback* pickCallback = ud->getPickCallback(i);
1705                 if (!pickCallback)
1706                     continue;
1707                 SGSceneryPick sceneryPick;
1708                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
1709                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
1710                 sceneryPick.callback = pickCallback;
1711                 pickList.push_back(sceneryPick);
1712             }
1713         }
1714     }
1715     return !pickList.empty();
1716 }
1717
1718 void
1719 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
1720 {
1721     viewer = viewer_;
1722 }
1723
1724 void
1725 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
1726 {
1727     eventHandler = eventHandler_;
1728 }
1729
1730 void
1731 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
1732 {
1733     mRealRoot->addChild(camera);
1734 }
1735
1736 void
1737 FGRenderer::removeCamera(osg::Camera* camera)
1738 {
1739     mRealRoot->removeChild(camera);
1740 }
1741
1742 void
1743 FGRenderer::setPlanes( double zNear, double zFar )
1744 {
1745         _planes->set( osg::Vec3f( - zFar, - zFar * zNear, zFar - zNear ) );
1746 }
1747
1748 bool
1749 fgDumpSceneGraphToFile(const char* filename)
1750 {
1751     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
1752 }
1753
1754 bool
1755 fgDumpTerrainBranchToFile(const char* filename)
1756 {
1757     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
1758                                  filename );
1759 }
1760
1761 // For debugging
1762 bool
1763 fgDumpNodeToFile(osg::Node* node, const char* filename)
1764 {
1765     return osgDB::writeNodeFile(*node, filename);
1766 }
1767
1768 namespace flightgear
1769 {
1770 using namespace osg;
1771
1772 class VisibleSceneInfoVistor : public NodeVisitor, CullStack
1773 {
1774 public:
1775     VisibleSceneInfoVistor()
1776         : NodeVisitor(CULL_VISITOR, TRAVERSE_ACTIVE_CHILDREN)
1777     {
1778         setCullingMode(CullSettings::SMALL_FEATURE_CULLING
1779                        | CullSettings::VIEW_FRUSTUM_CULLING);
1780         setComputeNearFarMode(CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
1781     }
1782
1783     VisibleSceneInfoVistor(const VisibleSceneInfoVistor& rhs)
1784     {
1785     }
1786
1787     META_NodeVisitor("flightgear","VisibleSceneInfoVistor")
1788
1789     typedef std::map<const std::string,int> InfoMap;
1790
1791     void getNodeInfo(Node* node)
1792     {
1793         const char* typeName = typeid(*node).name();
1794         classInfo[typeName]++;
1795         const std::string& nodeName = node->getName();
1796         if (!nodeName.empty())
1797             nodeInfo[nodeName]++;
1798     }
1799
1800     void dumpInfo()
1801     {
1802         using namespace std;
1803         typedef vector<InfoMap::iterator> FreqVector;
1804         cout << "class info:\n";
1805         FreqVector classes;
1806         for (InfoMap::iterator itr = classInfo.begin(), end = classInfo.end();
1807              itr != end;
1808              ++itr)
1809             classes.push_back(itr);
1810         sort(classes.begin(), classes.end(), freqComp);
1811         for (FreqVector::iterator itr = classes.begin(), end = classes.end();
1812              itr != end;
1813              ++itr) {
1814             cout << (*itr)->first << " " << (*itr)->second << "\n";
1815         }
1816         cout << "\nnode info:\n";
1817         FreqVector nodes;
1818         for (InfoMap::iterator itr = nodeInfo.begin(), end = nodeInfo.end();
1819              itr != end;
1820              ++itr)
1821             nodes.push_back(itr);
1822
1823         sort (nodes.begin(), nodes.end(), freqComp);
1824         for (FreqVector::iterator itr = nodes.begin(), end = nodes.end();
1825              itr != end;
1826              ++itr) {
1827             cout << (*itr)->first << " " << (*itr)->second << "\n";
1828         }
1829         cout << endl;
1830     }
1831
1832     void doTraversal(Camera* camera, Node* root, Viewport* viewport)
1833     {
1834         ref_ptr<RefMatrix> projection
1835             = createOrReuseMatrix(camera->getProjectionMatrix());
1836         ref_ptr<RefMatrix> mv = createOrReuseMatrix(camera->getViewMatrix());
1837         if (!viewport)
1838             viewport = camera->getViewport();
1839         if (viewport)
1840             pushViewport(viewport);
1841         pushProjectionMatrix(projection.get());
1842         pushModelViewMatrix(mv.get(), Transform::ABSOLUTE_RF);
1843         root->accept(*this);
1844         popModelViewMatrix();
1845         popProjectionMatrix();
1846         if (viewport)
1847             popViewport();
1848         dumpInfo();
1849     }
1850
1851     void apply(Node& node)
1852     {
1853         if (isCulled(node))
1854             return;
1855         pushCurrentMask();
1856         getNodeInfo(&node);
1857         traverse(node);
1858         popCurrentMask();
1859     }
1860     void apply(Group& node)
1861     {
1862         if (isCulled(node))
1863             return;
1864         pushCurrentMask();
1865         getNodeInfo(&node);
1866         traverse(node);
1867         popCurrentMask();
1868     }
1869
1870     void apply(Transform& node)
1871     {
1872         if (isCulled(node))
1873             return;
1874         pushCurrentMask();
1875         ref_ptr<RefMatrix> matrix = createOrReuseMatrix(*getModelViewMatrix());
1876         node.computeLocalToWorldMatrix(*matrix,this);
1877         pushModelViewMatrix(matrix.get(), node.getReferenceFrame());
1878         getNodeInfo(&node);
1879         traverse(node);
1880         popModelViewMatrix();
1881         popCurrentMask();
1882     }
1883
1884     void apply(Camera& camera)
1885     {
1886         // Save current cull settings
1887         CullSettings saved_cull_settings(*this);
1888
1889         // set cull settings from this Camera
1890         setCullSettings(camera);
1891         // inherit the settings from above
1892         inheritCullSettings(saved_cull_settings, camera.getInheritanceMask());
1893
1894         // set the cull mask.
1895         unsigned int savedTraversalMask = getTraversalMask();
1896         bool mustSetCullMask = (camera.getInheritanceMask()
1897                                 & osg::CullSettings::CULL_MASK) == 0;
1898         if (mustSetCullMask)
1899             setTraversalMask(camera.getCullMask());
1900
1901         osg::RefMatrix* projection = 0;
1902         osg::RefMatrix* modelview = 0;
1903
1904         if (camera.getReferenceFrame()==osg::Transform::RELATIVE_RF) {
1905             if (camera.getTransformOrder()==osg::Camera::POST_MULTIPLY) {
1906                 projection = createOrReuseMatrix(*getProjectionMatrix()
1907                                                  *camera.getProjectionMatrix());
1908                 modelview = createOrReuseMatrix(*getModelViewMatrix()
1909                                                 * camera.getViewMatrix());
1910             }
1911             else {              // pre multiply
1912                 projection = createOrReuseMatrix(camera.getProjectionMatrix()
1913                                                  * (*getProjectionMatrix()));
1914                 modelview = createOrReuseMatrix(camera.getViewMatrix()
1915                                                 * (*getModelViewMatrix()));
1916             }
1917         } else {
1918             // an absolute reference frame
1919             projection = createOrReuseMatrix(camera.getProjectionMatrix());
1920             modelview = createOrReuseMatrix(camera.getViewMatrix());
1921         }
1922         if (camera.getViewport())
1923             pushViewport(camera.getViewport());
1924
1925         pushProjectionMatrix(projection);
1926         pushModelViewMatrix(modelview, camera.getReferenceFrame());
1927
1928         traverse(camera);
1929
1930         // restore the previous model view matrix.
1931         popModelViewMatrix();
1932
1933         // restore the previous model view matrix.
1934         popProjectionMatrix();
1935
1936         if (camera.getViewport()) popViewport();
1937
1938         // restore the previous traversal mask settings
1939         if (mustSetCullMask)
1940             setTraversalMask(savedTraversalMask);
1941
1942         // restore the previous cull settings
1943         setCullSettings(saved_cull_settings);
1944     }
1945
1946 protected:
1947     // sort in reverse
1948     static bool freqComp(const InfoMap::iterator& lhs, const InfoMap::iterator& rhs)
1949     {
1950         return lhs->second > rhs->second;
1951     }
1952     InfoMap classInfo;
1953     InfoMap nodeInfo;
1954 };
1955
1956 bool printVisibleSceneInfo(FGRenderer* renderer)
1957 {
1958     osgViewer::Viewer* viewer = renderer->getViewer();
1959     VisibleSceneInfoVistor vsv;
1960     Viewport* vp = 0;
1961     if (!viewer->getCamera()->getViewport() && viewer->getNumSlaves() > 0) {
1962         const View::Slave& slave = viewer->getSlave(0);
1963         vp = slave._camera->getViewport();
1964     }
1965     vsv.doTraversal(viewer->getCamera(), viewer->getSceneData(), vp);
1966     return true;
1967 }
1968
1969 }
1970 // end of renderer.cxx
1971