src/Main/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 // $Id$
  23
  24
  25 #ifdef HAVE_CONFIG_H
  26 #  include <config.h>
  27 #endif
  28
  29 #include <simgear/compiler.h>
  30
  31 #ifdef HAVE_WINDOWS_H
  32 #  include <windows.h>
  33 #endif
  34
  35 #include <osg/ref_ptr>
  36 #include <osg/AlphaFunc>
  37 #include <osg/BlendFunc>
  38 #include <osg/CameraNode>
  39 #include <osg/CameraView>
  40 #include <osg/CullFace>
  41 #include <osg/Depth>
  42 #include <osg/Fog>
  43 #include <osg/Group>
  44 #include <osg/Light>
  45 #include <osg/LightModel>
  46 #include <osg/LightSource>
  47 #include <osg/NodeCallback>
  48 #include <osg/Notify>
  49 #include <osg/PolygonMode>
  50 #include <osg/PolygonOffset>
  51 #include <osg/ShadeModel>
  52 #include <osg/TexEnv>
  53
  54 #include <osgUtil/SceneView>
  55 #include <osgUtil/UpdateVisitor>
  56 #include <osgUtil/IntersectVisitor>
  57
  58 #include <osg/io_utils>
  59 #include <osgDB/WriteFile>
  60 #include <osgDB/ReadFile>
  61 #include <sstream>
  62
  63 #include <simgear/math/SGMath.hxx>
  64 #include <simgear/screen/extensions.hxx>
  65 #include <simgear/scene/material/matlib.hxx>
  66 #include <simgear/scene/model/animation.hxx>
  67 #include <simgear/scene/model/model.hxx>
  68 #include <simgear/scene/model/modellib.hxx>
  69 #include <simgear/scene/model/placement.hxx>
  70 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  71 #include <simgear/scene/tgdb/pt_lights.hxx>
  72 #include <simgear/props/props.hxx>
  73 #include <simgear/timing/sg_time.hxx>
  74 #include <simgear/ephemeris/ephemeris.hxx>
  75 #include <simgear/math/sg_random.h>
  76 #ifdef FG_JPEG_SERVER
  77 #include <simgear/screen/jpgfactory.hxx>
  78 #endif
  79
  80 #include <simgear/environment/visual_enviro.hxx>
  81
  82 #include <Scenery/tileentry.hxx>
  83 #include <Time/light.hxx>
  84 #include <Time/light.hxx>
  85 #include <Aircraft/aircraft.hxx>
  86 #include <Cockpit/panel.hxx>
  87 #include <Cockpit/cockpit.hxx>
  88 #include <Cockpit/hud.hxx>
  89 #include <Model/panelnode.hxx>
  90 #include <Model/modelmgr.hxx>
  91 #include <Model/acmodel.hxx>
  92 #include <Scenery/scenery.hxx>
  93 #include <Scenery/tilemgr.hxx>
  94 #include <ATC/ATCdisplay.hxx>
  95 #include <GUI/new_gui.hxx>
  96 #include <Instrumentation/instrument_mgr.hxx>
  97 #include <Instrumentation/HUD/HUD.hxx>
  98
  99 #include "splash.hxx"
 100 #include "renderer.hxx"
 101 #include "main.hxx"
 102
 103 class SGPuDrawable : public osg::Drawable {
 104 public:
 105   SGPuDrawable()
 106   {
 107     // Dynamic stuff, do not store geometry
 108     setUseDisplayList(false);
 109
 110     osg::StateSet* stateSet = getOrCreateStateSet();
 111     stateSet->setRenderBinDetails(1001, "RenderBin");
 112     // speed optimization?
 113     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 114     // We can do translucent menus, so why not. :-)
 115     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 116     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 117     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 118
 119     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 120
 121     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 122     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 123   }
 124   virtual void drawImplementation(osg::State& state) const
 125   {
 126     state.pushStateSet(getStateSet());
 127     state.apply();
 128     state.setActiveTextureUnit(0);
 129     state.setClientActiveTextureUnit(0);
 130
 131     if((fgGetBool("/sim/atc/enabled"))
 132        || (fgGetBool("/sim/ai-traffic/enabled")))
 133       globals->get_ATC_display()->update(delta_time_sec, state);
 134
 135     puDisplay();
 136
 137     // Fade out the splash screen over the first three seconds.
 138     double t = globals->get_sim_time_sec();
 139     if (t <= 2.5) {
 140       glPushAttrib(GL_ALL_ATTRIB_BITS);
 141       glPushClientAttrib(~0u);
 142
 143       fgSplashUpdate((2.5 - t) / 2.5);
 144
 145       glPopClientAttrib();
 146       glPopAttrib();
 147     }
 148
 149     state.popStateSet();
 150   }
 151
 152   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 153   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 154
 155 private:
 156 };
 157
 158 class SGHUDAndPanelDrawable : public osg::Drawable {
 159 public:
 160   SGHUDAndPanelDrawable()
 161   {
 162     // Dynamic stuff, do not store geometry
 163     setUseDisplayList(false);
 164
 165     osg::StateSet* stateSet = getOrCreateStateSet();
 166     stateSet->setRenderBinDetails(1000, "RenderBin");
 167
 168     // speed optimization?
 169     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 170     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 171     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 172     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 173     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 174
 175     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 176   }
 177   virtual void drawImplementation(osg::State& state) const
 178   {
 179     state.pushStateSet(getStateSet());
 180     state.apply();
 181     state.setActiveTextureUnit(0);
 182     state.setClientActiveTextureUnit(0);
 183
 184     glPushAttrib(GL_ALL_ATTRIB_BITS);
 185     glPushClientAttrib(~0u);
 186
 187     fgCockpitUpdate(&state);
 188
 189     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 190     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 191     hud->draw(state);
 192
 193     // update the panel subsystem
 194     if ( globals->get_current_panel() != NULL )
 195         globals->get_current_panel()->update(state);
 196     // We don't need a state here - can be safely removed when we can pick
 197     // correctly
 198     fgUpdate3DPanels();
 199
 200     glPopClientAttrib();
 201     glPopAttrib();
 202
 203     state.popStateSet();
 204   }
 205
 206   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 207   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 208
 209 private:
 210 };
 211
 212 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 213 public:
 214   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 215   {
 216     assert(dynamic_cast<osg::LightSource*>(node));
 217     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 218     osg::Light* light = lightSource->getLight();
 219
 220     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 221     light->setAmbient(l->scene_ambient().osg());
 222     light->setDiffuse(l->scene_diffuse().osg());
 223     light->setSpecular(l->scene_specular().osg());
 224     SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 225     light->setPosition(position.osg());
 226     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 227     light->setDirection(direction.osg());
 228     light->setSpotExponent(0);
 229     light->setSpotCutoff(180);
 230     light->setConstantAttenuation(1);
 231     light->setLinearAttenuation(0);
 232     light->setQuadraticAttenuation(0);
 233
 234     traverse(node, nv);
 235   }
 236 };
 237
 238 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 239 public:
 240   FGWireFrameModeUpdateCallback() :
 241     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 242   { }
 243   virtual void operator()(osg::StateAttribute* stateAttribute,
 244                           osg::NodeVisitor*)
 245   {
 246     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 247     osg::PolygonMode* polygonMode;
 248     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 249
 250     if (mWireframe->getBoolValue())
 251       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 252                            osg::PolygonMode::LINE);
 253     else
 254       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 255                            osg::PolygonMode::FILL);
 256   }
 257 private:
 258   SGSharedPtr<SGPropertyNode> mWireframe;
 259 };
 260
 261 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 262 public:
 263   FGLightModelUpdateCallback() :
 264     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 265   { }
 266   virtual void operator()(osg::StateAttribute* stateAttribute,
 267                           osg::NodeVisitor*)
 268   {
 269     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 270     osg::LightModel* lightModel;
 271     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 272
 273 #if 0
 274     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 275     lightModel->setAmbientIntensity(l->scene_ambient().osg());
 276 #else
 277     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 278 #endif
 279     lightModel->setTwoSided(true);
 280     lightModel->setLocalViewer(false);
 281
 282     if (mHighlights->getBoolValue()) {
 283       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 284     } else {
 285       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 286     }
 287   }
 288 private:
 289   SGSharedPtr<SGPropertyNode> mHighlights;
 290 };
 291
 292 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 293 public:
 294   FGFogEnableUpdateCallback() :
 295     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 296   { }
 297   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 298   {
 299     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 300       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 301     } else {
 302       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 303     }
 304   }
 305 private:
 306   SGSharedPtr<SGPropertyNode> mFogEnabled;
 307 };
 308
 309 // fog constants.  I'm a little nervous about putting actual code out
 310 // here but it seems to work (?)
 311 static const double m_log01 = -log( 0.01 );
 312 static const double sqrt_m_log01 = sqrt( m_log01 );
 313 static GLfloat fog_exp_density;
 314 static GLfloat fog_exp2_density;
 315 static GLfloat rwy_exp2_punch_through;
 316 static GLfloat taxi_exp2_punch_through;
 317 static GLfloat ground_exp2_punch_through;
 318
 319 // Sky structures
 320 SGSky *thesky;
 321
 322 static osg::ref_ptr<osgUtil::SceneView> sceneView = new osgUtil::SceneView;
 323 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 324 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 325
 326 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 327
 328 static osg::ref_ptr<osg::CameraView> mCameraView = new osg::CameraView;
 329 static osg::ref_ptr<osg::CameraNode> mBackGroundCamera = new osg::CameraNode;
 330 osg::ref_ptr<osg::CameraNode> mSceneCamera = new osg::CameraNode;
 331
 332 static osg::ref_ptr<osg::Fog> mFog = new osg::Fog;
 333 static osg::ref_ptr<osg::Fog> mRunwayLightingFog = new osg::Fog;
 334 static osg::ref_ptr<osg::Fog> mTaxiLightingFog = new osg::Fog;
 335 static osg::ref_ptr<osg::Fog> mGroundLightingFog = new osg::Fog;
 336
 337 FGRenderer::FGRenderer()
 338 {
 339 #ifdef FG_JPEG_SERVER
 340    jpgRenderFrame = FGRenderer::update;
 341 #endif
 342 }
 343
 344 FGRenderer::~FGRenderer()
 345 {
 346 #ifdef FG_JPEG_SERVER
 347    jpgRenderFrame = NULL;
 348 #endif
 349 }
 350
 351 // Initialize various GL/view parameters
 352 void
 353 FGRenderer::init( void ) {
 354
 355     osg::initNotifyLevel();
 356
 357     // The number of polygon-offset "units" to place between layers.  In
 358     // principle, one is supposed to be enough.  In practice, I find that
 359     // my hardware/driver requires many more.
 360     osg::PolygonOffset::setUnitsMultiplier(1);
 361     osg::PolygonOffset::setFactorMultiplier(1);
 362
 363     // Go full screen if requested ...
 364     if ( fgGetBool("/sim/startup/fullscreen") )
 365         fgOSFullScreen();
 366
 367     if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
 368          (!fgGetBool("/sim/rendering/shading"))) {
 369         // if fastest fog requested, or if flat shading force fastest
 370         glHint ( GL_FOG_HINT, GL_FASTEST );
 371     } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
 372         glHint ( GL_FOG_HINT, GL_DONT_CARE );
 373     }
 374
 375     glHint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 376     glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 377     glHint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 378
 379     sceneView->setDefaults(osgUtil::SceneView::COMPILE_GLOBJECTS_AT_INIT);
 380
 381     mFog->setMode(osg::Fog::EXP2);
 382     mRunwayLightingFog->setMode(osg::Fog::EXP2);
 383     mTaxiLightingFog->setMode(osg::Fog::EXP2);
 384     mGroundLightingFog->setMode(osg::Fog::EXP2);
 385
 386     sceneView->setFrameStamp(mFrameStamp.get());
 387
 388     mUpdateVisitor = new SGUpdateVisitor;
 389     sceneView->setUpdateVisitor(mUpdateVisitor.get());
 390
 391     sceneView->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 392     sceneView->getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 393
 394     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 395
 396     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 397
 398     stateSet->setAttribute(new osg::Depth(osg::Depth::LEQUAL));
 399     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 400
 401     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 402     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 403     stateSet->setAttribute(new osg::BlendFunc);
 404     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 405
 406     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 407
 408     // this will be set below
 409     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 410
 411     osg::Material* material = new osg::Material;
 412     stateSet->setAttribute(material);
 413
 414     stateSet->setTextureAttribute(0, new osg::TexEnv);
 415     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 416
 417
 418 //     stateSet->setAttribute(new osg::CullFace(osg::CullFace::BACK));
 419 //     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
 420
 421
 422     // this is the topmost scenegraph node for osg
 423     mBackGroundCamera->addChild(thesky->getPreRoot());
 424     mBackGroundCamera->setClearMask(0);
 425
 426     GLbitfield inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 427     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 428     inheritanceMask &= ~osg::CullSettings::NEAR_FAR_RATIO;
 429     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 430     mBackGroundCamera->setInheritanceMask(inheritanceMask);
 431     mBackGroundCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 432     mBackGroundCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 433     mBackGroundCamera->setRenderOrder(osg::CameraNode::NESTED_RENDER);
 434
 435     stateSet = mBackGroundCamera->getOrCreateStateSet();
 436     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 437
 438
 439     mSceneCamera->setClearMask(0);
 440     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 441     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 442     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 443     mSceneCamera->setInheritanceMask(inheritanceMask);
 444     mSceneCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 445     mSceneCamera->setCullingMode(osg::CullSettings::DEFAULT_CULLING);
 446     mSceneCamera->setRenderOrder(osg::CameraNode::NESTED_RENDER);
 447     mSceneCamera->addChild(globals->get_scenery()->get_scene_graph());
 448     mSceneCamera->addChild(thesky->getCloudRoot());
 449
 450     stateSet = mSceneCamera->getOrCreateStateSet();
 451     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 452     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 453
 454     // need to update the light on every frame
 455     osg::LightSource* lightSource = new osg::LightSource;
 456     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 457     // relative because of CameraView being just a clever transform node
 458     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 459     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 460     mRoot->addChild(lightSource);
 461
 462     lightSource->addChild(mBackGroundCamera.get());
 463     lightSource->addChild(mSceneCamera.get());
 464
 465
 466     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 467     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 468     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 469     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 470     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 471
 472     // enable disable specular highlights.
 473     // is the place where we might plug in an other fragment shader ...
 474     osg::LightModel* lightModel = new osg::LightModel;
 475     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 476     stateSet->setAttribute(lightModel);
 477
 478     // switch to enable wireframe
 479     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 480     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 481     stateSet->setAttributeAndModes(polygonMode);
 482
 483     // scene fog handling
 484     stateSet->setAttributeAndModes(mFog.get());
 485     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 486
 487     // plug in the GUI
 488     osg::CameraNode* guiCamera = new osg::CameraNode;
 489     guiCamera->setRenderOrder(osg::CameraNode::POST_RENDER);
 490     guiCamera->setClearMask(0);
 491     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 492     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 493     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 494     guiCamera->setInheritanceMask(inheritanceMask);
 495     guiCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 496     guiCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 497     mRoot->addChild(guiCamera);
 498     osg::Geode* geode = new osg::Geode;
 499     geode->addDrawable(new SGPuDrawable);
 500     geode->addDrawable(new SGHUDAndPanelDrawable);
 501     guiCamera->addChild(geode);
 502
 503     // this one contains all lights, here we set the light states we did
 504     // in the plib case with plain OpenGL
 505     osg::Group* lightGroup = new osg::Group;
 506     mSceneCamera->addChild(lightGroup);
 507     lightGroup->addChild(globals->get_scenery()->get_gnd_lights_root());
 508     lightGroup->addChild(globals->get_scenery()->get_vasi_lights_root());
 509     lightGroup->addChild(globals->get_scenery()->get_rwy_lights_root());
 510     lightGroup->addChild(globals->get_scenery()->get_taxi_lights_root());
 511
 512     stateSet = globals->get_scenery()->get_gnd_lights_root()->getOrCreateStateSet();
 513     stateSet->setAttributeAndModes(mFog.get());
 514     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 515     stateSet = globals->get_scenery()->get_vasi_lights_root()->getOrCreateStateSet();
 516     stateSet->setAttributeAndModes(mRunwayLightingFog.get());
 517     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 518     stateSet = globals->get_scenery()->get_rwy_lights_root()->getOrCreateStateSet();
 519     stateSet->setAttributeAndModes(mRunwayLightingFog.get());
 520     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 521     stateSet = globals->get_scenery()->get_taxi_lights_root()->getOrCreateStateSet();
 522     stateSet->setAttributeAndModes(mTaxiLightingFog.get());
 523     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 524
 525     mCameraView->addChild(mRoot.get());
 526     sceneView->setSceneData(mCameraView.get());
 527
 528 //  sceneView->getState()->setCheckForGLErrors(osg::State::ONCE_PER_ATTRIBUTE);
 529 }
 530
 531
 532 // Update all Visuals (redraws anything graphics related)
 533 void
 534 FGRenderer::update( bool refresh_camera_settings ) {
 535     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 536                           || fgGetBool("sim/sceneryloaded-override");
 537
 538     if ( idle_state < 1000 || !scenery_loaded ) {
 539         if (sceneView.valid() && sceneView->getState()) {
 540             sceneView->getState()->setActiveTextureUnit(0);
 541             sceneView->getState()->setClientActiveTextureUnit(0);
 542         }
 543         // still initializing, draw the splash screen
 544         glPushAttrib(GL_ALL_ATTRIB_BITS);
 545         glPushClientAttrib(~0u);
 546
 547         fgSplashUpdate(1.0);
 548
 549         glPopClientAttrib();
 550         glPopAttrib();
 551
 552         // Keep resetting sim time while the sim is initializing
 553         globals->set_sim_time_sec( 0.0 );
 554         return;
 555     }
 556
 557     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 558     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 559     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 560     bool distance_attenuation
 561         = fgGetBool("/sim/rendering/distance-attenuation");
 562     // OSGFIXME
 563     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 564                                   distance_attenuation );
 565
 566     static const SGPropertyNode *groundlevel_nearplane
 567         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 568
 569     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 570
 571     // update fog params
 572     double actual_visibility;
 573     if (fgGetBool("/environment/clouds/status")) {
 574         actual_visibility = thesky->get_visibility();
 575     } else {
 576         actual_visibility = fgGetDouble("/environment/visibility-m");
 577     }
 578
 579     static double last_visibility = -9999;
 580     if ( actual_visibility != last_visibility ) {
 581         last_visibility = actual_visibility;
 582
 583         fog_exp_density = m_log01 / actual_visibility;
 584         fog_exp2_density = sqrt_m_log01 / actual_visibility;
 585         ground_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 586         if ( actual_visibility < 8000 ) {
 587             rwy_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 2.5);
 588             taxi_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 589         } else {
 590             rwy_exp2_punch_through = sqrt_m_log01 / ( 8000 * 2.5 );
 591             taxi_exp2_punch_through = sqrt_m_log01 / ( 8000 * 1.5 );
 592         }
 593         mFog->setDensity(fog_exp2_density);
 594         mRunwayLightingFog->setDensity(rwy_exp2_punch_through);
 595         mTaxiLightingFog->setDensity(taxi_exp2_punch_through);
 596         mGroundLightingFog->setDensity(ground_exp2_punch_through);
 597     }
 598
 599     // idle_state is now 1000 meaning we've finished all our
 600     // initializations and are running the main loop, so this will
 601     // now work without seg faulting the system.
 602
 603     FGViewer *current__view = globals->get_current_view();
 604     // Force update of center dependent values ...
 605     current__view->set_dirty();
 606
 607     if ( refresh_camera_settings ) {
 608         // update view port
 609         resize( fgGetInt("/sim/startup/xsize"),
 610                 fgGetInt("/sim/startup/ysize") );
 611
 612         SGVec3d center = globals->get_scenery()->get_center();
 613         SGVec3d position = current__view->getViewPosition();
 614         SGQuatd attitude = current__view->getViewOrientation();
 615         SGVec3d osgPosition = attitude.transform(center - position);
 616         mCameraView->setPosition(osgPosition.osg());
 617         mCameraView->setAttitude(inverse(attitude).osg());
 618     }
 619
 620     if ( skyblend ) {
 621         if ( fgGetBool("/sim/rendering/textures") ) {
 622             SGVec4f clearColor(l->adj_fog_color());
 623             sceneView->getCamera()->setClearColor(clearColor.osg());
 624         }
 625     } else {
 626         SGVec4f clearColor(l->sky_color());
 627         sceneView->getCamera()->setClearColor(clearColor.osg());
 628     }
 629
 630     // update fog params if visibility has changed
 631     double visibility_meters = fgGetDouble("/environment/visibility-m");
 632     thesky->set_visibility(visibility_meters);
 633
 634     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 635                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 636                         / (double)fgGetInt("/sim/model-hz") );
 637
 638     // update the sky dome
 639     if ( skyblend ) {
 640
 641         // The sun and moon distances are scaled down versions
 642         // of the actual distance to get both the moon and the sun
 643         // within the range of the far clip plane.
 644         // Moon distance:    384,467 kilometers
 645         // Sun distance: 150,000,000 kilometers
 646
 647         double sun_horiz_eff, moon_horiz_eff;
 648         if (fgGetBool("/sim/rendering/horizon-effect")) {
 649            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 650            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 651         } else {
 652            sun_horiz_eff = moon_horiz_eff = 1.0;
 653         }
 654
 655         static SGSkyState sstate;
 656
 657         sstate.view_pos  = current__view->get_view_pos();
 658         sstate.zero_elev = current__view->get_zero_elev();
 659         sstate.view_up   = current__view->get_world_up();
 660         sstate.lon       = current__view->getLongitude_deg()
 661                             * SGD_DEGREES_TO_RADIANS;
 662         sstate.lat       = current__view->getLatitude_deg()
 663                             * SGD_DEGREES_TO_RADIANS;
 664         sstate.alt       = current__view->getAltitudeASL_ft()
 665                             * SG_FEET_TO_METER;
 666         sstate.spin      = l->get_sun_rotation();
 667         sstate.gst       = globals->get_time_params()->getGst();
 668         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 669         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 670         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 671         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 672         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 673         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 674         sstate.sun_angle = l->get_sun_angle();
 675
 676
 677         /*
 678          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 679          << l->sky_color()[0] << " "
 680          << l->sky_color()[1] << " "
 681          << l->sky_color()[2] << " "
 682          << l->sky_color()[3] );
 683         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 684          << l->fog_color()[0] << " "
 685          << l->fog_color()[1] << " "
 686          << l->fog_color()[2] << " "
 687          << l->fog_color()[3] );
 688         SG_LOG( SG_GENERAL, SG_BULK,
 689                 "    sun_angle = " << l->sun_angle
 690          << "    moon_angle = " << l->moon_angle );
 691         */
 692
 693         static SGSkyColor scolor;
 694
 695         scolor.sky_color   = SGVec3f(l->sky_color().data());
 696         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 697         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 698         scolor.sun_angle   = l->get_sun_angle();
 699         scolor.moon_angle  = l->get_moon_angle();
 700         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 701         scolor.nstars      = globals->get_ephem()->getNumStars();
 702         scolor.planet_data = globals->get_ephem()->getPlanets();
 703         scolor.star_data   = globals->get_ephem()->getStars();
 704
 705         thesky->reposition( sstate, delta_time_sec );
 706         thesky->repaint( scolor );
 707
 708         /*
 709         SG_LOG( SG_GENERAL, SG_BULK,
 710                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 711          << view_pos[1] << " " << view_pos[2] );
 712         SG_LOG( SG_GENERAL, SG_BULK,
 713                 "    zero_elev = " << zero_elev[0] << " "
 714          << zero_elev[1] << " " << zero_elev[2]
 715          << " lon = " << cur_fdm_state->get_Longitude()
 716          << " lat = " << cur_fdm_state->get_Latitude() );
 717         SG_LOG( SG_GENERAL, SG_BULK,
 718                 "    sun_rot = " << l->get_sun_rotation
 719          << " gst = " << SGTime::cur_time_params->getGst() );
 720         SG_LOG( SG_GENERAL, SG_BULK,
 721              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 722           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 723           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 724           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 725         */
 726
 727         //OSGFIXME
 728 //         shadows->setupShadows(
 729 //           current__view->getLongitude_deg(),
 730 //           current__view->getLatitude_deg(),
 731 //           globals->get_time_params()->getGst(),
 732 //           globals->get_ephem()->getSunRightAscension(),
 733 //           globals->get_ephem()->getSunDeclination(),
 734 //           l->get_sun_angle());
 735
 736     }
 737
 738     if ( strcmp(fgGetString("/sim/rendering/fog"), "disabled") ) {
 739         SGVec4f color(l->adj_fog_color());
 740         mFog->setColor(color.osg());
 741         mRunwayLightingFog->setColor(color.osg());
 742         mTaxiLightingFog->setColor(color.osg());
 743         mGroundLightingFog->setColor(color.osg());
 744     }
 745
 746
 747 //     sgEnviro.setLight(l->adj_fog_color());
 748
 749     // texture parameters
 750     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
 751
 752     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 753       - current__view->getSGLocation()->get_cur_elev_m();
 754
 755     float scene_nearplane, scene_farplane;
 756     if ( agl > 10.0 ) {
 757         scene_nearplane = 10.0f;
 758         scene_farplane = 120000.0f;
 759     } else {
 760         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 761         scene_farplane = 120000.0f;
 762     }
 763
 764     setNearFar( scene_nearplane, scene_farplane );
 765
 766 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 767 //         current__view->get_world_up(),
 768 //         current__view->getLongitude_deg(),
 769 //         current__view->getLatitude_deg(),
 770 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 771 //         delta_time_sec);
 772
 773     // OSGFIXME
 774 //     sgEnviro.drawLightning();
 775
 776 //        double current_view_origin_airspeed_horiz_kt =
 777 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 778 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 779 //                                * SGD_DEGREES_TO_RADIANS);
 780        // TODO:find the real view speed, not the AC one
 781 //     sgEnviro.drawPrecipitation(
 782 //         fgGetDouble("/environment/metar/rain-norm", 0.0),
 783 //         fgGetDouble("/environment/metar/snow-norm", 0.0),
 784 //         fgGetDouble("/environment/metar/hail-norm", 0.0),
 785 //         current__view->getPitch_deg() + current__view->getPitchOffset_deg(),
 786 //         current__view->getRoll_deg() + current__view->getRollOffset_deg(),
 787 //         - current__view->getHeadingOffset_deg(),
 788 //                current_view_origin_airspeed_horiz_kt
 789 //                );
 790
 791     // OSGFIXME
 792 //     if( is_internal )
 793 //         shadows->endOfFrame();
 794
 795     // need to call the update visitor once
 796     globals->get_aircraft_model()->select( true );
 797     FGTileMgr::set_tile_filter( true );
 798     mFrameStamp->setReferenceTime(globals->get_sim_time_sec());
 799     mFrameStamp->setFrameNumber(1+mFrameStamp->getFrameNumber());
 800     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 801     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 802                                 current__view->getViewOrientation());
 803     mUpdateVisitor->setSceneryCenter(globals->get_scenery()->get_center());
 804     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 805     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 806                              l->scene_diffuse(), l->scene_specular());
 807     mUpdateVisitor->setVisibility(actual_visibility);
 808
 809     if (fgGetBool("/sim/panel-hotspots"))
 810       sceneView->setCullMask(~0u);
 811     else
 812       sceneView->setCullMask(~SG_NODEMASK_PICK_BIT);
 813
 814     sceneView->update();
 815     sceneView->cull();
 816     sceneView->draw();
 817 }
 818
 819
 820
 821 // options.cxx needs to see this for toggle_panel()
 822 // Handle new window size or exposure
 823 void
 824 FGRenderer::resize( int width, int height ) {
 825     int view_h;
 826
 827     if ( (!fgGetBool("/sim/virtual-cockpit"))
 828          && fgPanelVisible() && idle_state == 1000 ) {
 829         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 830                              globals->get_current_panel()->getYOffset()) / 768.0);
 831     } else {
 832         view_h = height;
 833     }
 834
 835     sceneView->getViewport()->setViewport(0, height - view_h, width, view_h);
 836
 837     static int lastwidth = 0;
 838     static int lastheight = 0;
 839     if (width != lastwidth)
 840         fgSetInt("/sim/startup/xsize", lastwidth = width);
 841     if (height != lastheight)
 842         fgSetInt("/sim/startup/ysize", lastheight = height);
 843
 844     guiInitMouse(width, height);
 845
 846     // for all views
 847     FGViewMgr *viewmgr = globals->get_viewmgr();
 848     if (viewmgr) {
 849       for ( int i = 0; i < viewmgr->size(); ++i ) {
 850         viewmgr->get_view(i)->
 851           set_aspect_ratio((float)view_h / (float)width);
 852       }
 853
 854       setFOV( viewmgr->get_current_view()->get_h_fov(),
 855               viewmgr->get_current_view()->get_v_fov() );
 856     }
 857 }
 858
 859
 860 // These are wrapper functions around ssgSetNearFar() and ssgSetFOV()
 861 // which will post process and rewrite the resulting frustum if we
 862 // want to do asymmetric view frustums.
 863
 864 static void fgHackFrustum() {
 865
 866     // specify a percent of the configured view frustum to actually
 867     // display.  This is a bit of a hack to achieve asymmetric view
 868     // frustums.  For instance, if you want to display two monitors
 869     // side by side, you could specify each with a double fov, a 0.5
 870     // aspect ratio multiplier, and then the left side monitor would
 871     // have a left_pct = 0.0, a right_pct = 0.5, a bottom_pct = 0.0,
 872     // and a top_pct = 1.0.  The right side monitor would have a
 873     // left_pct = 0.5 and a right_pct = 1.0.
 874
 875     static SGPropertyNode *left_pct
 876         = fgGetNode("/sim/current-view/frustum-left-pct");
 877     static SGPropertyNode *right_pct
 878         = fgGetNode("/sim/current-view/frustum-right-pct");
 879     static SGPropertyNode *bottom_pct
 880         = fgGetNode("/sim/current-view/frustum-bottom-pct");
 881     static SGPropertyNode *top_pct
 882         = fgGetNode("/sim/current-view/frustum-top-pct");
 883
 884     double left, right;
 885     double bottom, top;
 886     double zNear, zFar;
 887     sceneView->getProjectionMatrixAsFrustum(left, right, bottom, top, zNear, zFar);
 888     // cout << " l = " << f->getLeft()
 889     //      << " r = " << f->getRight()
 890     //      << " b = " << f->getBot()
 891     //      << " t = " << f->getTop()
 892     //      << " n = " << f->getNear()
 893     //      << " f = " << f->getFar()
 894     //      << endl;
 895
 896     double width = right - left;
 897     double height = top - bottom;
 898
 899     double l, r, t, b;
 900
 901     if ( left_pct != NULL ) {
 902         l = left + width * left_pct->getDoubleValue();
 903     } else {
 904         l = left;
 905     }
 906
 907     if ( right_pct != NULL ) {
 908         r = left + width * right_pct->getDoubleValue();
 909     } else {
 910         r = right;
 911     }
 912
 913     if ( bottom_pct != NULL ) {
 914         b = bottom + height * bottom_pct->getDoubleValue();
 915     } else {
 916         b = bottom;
 917     }
 918
 919     if ( top_pct != NULL ) {
 920         t = bottom + height * top_pct->getDoubleValue();
 921     } else {
 922         t = top;
 923     }
 924
 925     sceneView->setProjectionMatrixAsFrustum(l, r, b, t, zNear, zFar);
 926 }
 927
 928
 929 // we need some static storage space for these values.  However, we
 930 // can't store it in a renderer class object because the functions
 931 // that manipulate these are static.  They are static so they can
 932 // interface to the display callback system.  There's probably a
 933 // better way, there has to be a better way, but I'm not seeing it
 934 // right now.
 935 static float fov_width = 55.0;
 936 static float fov_height = 42.0;
 937 static float fov_near = 1.0;
 938 static float fov_far = 1000.0;
 939
 940
 941 /** FlightGear code should use this routine to set the FOV rather than
 942  *  calling the ssg routine directly
 943  */
 944 void FGRenderer::setFOV( float w, float h ) {
 945     fov_width = w;
 946     fov_height = h;
 947
 948     sceneView->setProjectionMatrixAsPerspective(fov_height,
 949                                                 fov_width/fov_height,
 950                                                 fov_near, fov_far);
 951     // fully specify the view frustum before hacking it (so we don't
 952     // accumulate hacked effects
 953     fgHackFrustum();
 954 //     sgEnviro.setFOV( w, h );
 955 }
 956
 957
 958 /** FlightGear code should use this routine to set the Near/Far clip
 959  *  planes rather than calling the ssg routine directly
 960  */
 961 void FGRenderer::setNearFar( float n, float f ) {
 962 // OSGFIXME: we have currently too much z-buffer fights
 963 n = 0.2;
 964     fov_near = n;
 965     fov_far = f;
 966
 967     sceneView->setProjectionMatrixAsPerspective(fov_height,
 968                                                 fov_width/fov_height,
 969                                                 fov_near, fov_far);
 970
 971     sceneView->getCamera()->setNearFarRatio(fov_near/fov_far);
 972     mSceneCamera->setNearFarRatio(fov_near/fov_far);
 973
 974     // fully specify the view frustum before hacking it (so we don't
 975     // accumulate hacked effects
 976     fgHackFrustum();
 977 }
 978
 979 bool
 980 FGRenderer::pick( unsigned x, unsigned y,
 981                   std::vector<SGSceneryPick>& pickList )
 982 {
 983   // wipe out the return ...
 984   pickList.resize(0);
 985
 986   // we can get called early ...
 987   if (!sceneView.valid())
 988     return false;
 989
 990   osg::Node* sceneData = globals->get_scenery()->get_scene_graph();
 991   if (!sceneData)
 992     return false;
 993   osg::Viewport* viewport = sceneView->getViewport();
 994   if (!viewport)
 995     return false;
 996
 997   // good old scenery center
 998   SGVec3d center = globals->get_scenery()->get_center();
 999
1000   // don't know why, but the update has partly happened somehow,
1001   // so update the scneery part of the viewer
1002   FGViewer *current_view = globals->get_current_view();
1003   // Force update of center dependent values ...
1004   current_view->set_dirty();
1005   SGVec3d position = current_view->getViewPosition();
1006   SGQuatd attitude = current_view->getViewOrientation();
1007   SGVec3d osgPosition = attitude.transform(center - position);
1008   mCameraView->setPosition(osgPosition.osg());
1009   mCameraView->setAttitude(inverse(attitude).osg());
1010
1011   osg::Matrix projection(sceneView->getProjectionMatrix());
1012   osg::Matrix modelview(sceneView->getViewMatrix());
1013
1014   osg::NodePathList nodePath = sceneData->getParentalNodePaths();
1015   // modify the view matrix so that it accounts for this nodePath's
1016   // accumulated transform
1017   if (!nodePath.empty())
1018     modelview.preMult(computeLocalToWorld(nodePath.front()));
1019
1020   // swap the y values ...
1021   y = viewport->height() - y;
1022   // set up the pick visitor
1023   osgUtil::PickVisitor pickVisitor(viewport, projection, modelview, x, y);
1024   sceneData->accept(pickVisitor);
1025   if (!pickVisitor.hits())
1026     return false;
1027
1028   // collect all interaction callbacks on the pick ray.
1029   // They get stored in the pickCallbacks list where they are sorted back
1030   // to front and croasest to finest wrt the scenery node they are attached to
1031   osgUtil::PickVisitor::LineSegmentHitListMap::const_iterator mi;
1032   for (mi = pickVisitor.getSegHitList().begin();
1033        mi != pickVisitor.getSegHitList().end();
1034        ++mi) {
1035     osgUtil::IntersectVisitor::HitList::const_iterator hi;
1036     for (hi = mi->second.begin(); hi != mi->second.end(); ++hi) {
1037       // ok, go back the nodes and ask for intersection callbacks,
1038       // execute them in top down order
1039       const osg::NodePath& np = hi->getNodePath();
1040       osg::NodePath::const_reverse_iterator npi;
1041       for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1042         SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1043         if (!ud)
1044           continue;
1045         for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1046           SGPickCallback* pickCallback = ud->getPickCallback(i);
1047           if (!pickCallback)
1048             continue;
1049           SGSceneryPick sceneryPick;
1050           /// note that this is done totally in doubles instead of
1051           /// just using getWorldIntersectionPoint
1052           osg::Vec3d localPt = hi->getLocalIntersectPoint();
1053           sceneryPick.info.local = SGVec3d(localPt);
1054           if (hi->getMatrix())
1055             sceneryPick.info.wgs84 = SGVec3d(localPt*(*hi->getMatrix()));
1056           else
1057             sceneryPick.info.wgs84 = SGVec3d(localPt);
1058           sceneryPick.info.wgs84 += globals->get_scenery()->get_center();
1059           sceneryPick.callback = pickCallback;
1060           pickList.push_back(sceneryPick);
1061         }
1062       }
1063     }
1064   }
1065
1066   return !pickList.empty();
1067 }
1068
1069 // end of renderer.cxx
1070