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/Camera>
  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::RenderInfo& renderInfo) const
 125   { drawImplementation(*renderInfo.getState()); }
 126   void drawImplementation(osg::State& state) const
 127   {
 128     state.pushStateSet(getStateSet());
 129     state.apply();
 130     state.setActiveTextureUnit(0);
 131     state.setClientActiveTextureUnit(0);
 132     state.disableAllVertexArrays();
 133
 134     glPushAttrib(GL_ALL_ATTRIB_BITS);
 135     glPushClientAttrib(~0u);
 136
 137     if((fgGetBool("/sim/atc/enabled"))
 138        || (fgGetBool("/sim/ai-traffic/enabled")))
 139       globals->get_ATC_display()->update(delta_time_sec, state);
 140
 141     puDisplay();
 142
 143     glPopClientAttrib();
 144     glPopAttrib();
 145
 146     // Fade out the splash screen over the first three seconds.
 147     double t = globals->get_sim_time_sec();
 148     if (t <= 2.5) {
 149       glPushAttrib(GL_ALL_ATTRIB_BITS);
 150       glPushClientAttrib(~0u);
 151
 152       fgSplashUpdate((2.5 - t) / 2.5);
 153
 154       glPopClientAttrib();
 155       glPopAttrib();
 156     }
 157
 158     state.popStateSet();
 159     state.dirtyAllModes();
 160     state.dirtyAllAttributes();
 161     state.dirtyAllVertexArrays();
 162   }
 163
 164   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 165   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 166
 167 private:
 168 };
 169
 170 class SGHUDAndPanelDrawable : public osg::Drawable {
 171 public:
 172   SGHUDAndPanelDrawable()
 173   {
 174     // Dynamic stuff, do not store geometry
 175     setUseDisplayList(false);
 176
 177     osg::StateSet* stateSet = getOrCreateStateSet();
 178     stateSet->setRenderBinDetails(1000, "RenderBin");
 179
 180     // speed optimization?
 181     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 182     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 183     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 184     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 185     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 186
 187     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 188   }
 189   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 190   { drawImplementation(*renderInfo.getState()); }
 191   void drawImplementation(osg::State& state) const
 192   {
 193     state.pushStateSet(getStateSet());
 194     state.apply();
 195     state.setActiveTextureUnit(0);
 196     state.setClientActiveTextureUnit(0);
 197     state.disableAllVertexArrays();
 198
 199     glPushAttrib(GL_ALL_ATTRIB_BITS);
 200     glPushClientAttrib(~0u);
 201
 202     fgCockpitUpdate(&state);
 203
 204     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 205     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 206     hud->draw(state);
 207
 208     // update the panel subsystem
 209     if ( globals->get_current_panel() != NULL )
 210         globals->get_current_panel()->update(state);
 211     // We don't need a state here - can be safely removed when we can pick
 212     // correctly
 213     fgUpdate3DPanels();
 214
 215     glPopClientAttrib();
 216     glPopAttrib();
 217
 218     state.popStateSet();
 219     state.dirtyAllModes();
 220     state.dirtyAllAttributes();
 221     state.dirtyAllVertexArrays();
 222   }
 223
 224   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 225   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 226
 227 private:
 228 };
 229
 230 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 231 public:
 232   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 233   {
 234     assert(dynamic_cast<osg::LightSource*>(node));
 235     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 236     osg::Light* light = lightSource->getLight();
 237
 238     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 239     light->setAmbient(l->scene_ambient().osg());
 240     light->setDiffuse(l->scene_diffuse().osg());
 241     light->setSpecular(l->scene_specular().osg());
 242     SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 243     light->setPosition(position.osg());
 244     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 245     light->setDirection(direction.osg());
 246     light->setSpotExponent(0);
 247     light->setSpotCutoff(180);
 248     light->setConstantAttenuation(1);
 249     light->setLinearAttenuation(0);
 250     light->setQuadraticAttenuation(0);
 251
 252     traverse(node, nv);
 253   }
 254 };
 255
 256 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 257 public:
 258   FGWireFrameModeUpdateCallback() :
 259     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 260   { }
 261   virtual void operator()(osg::StateAttribute* stateAttribute,
 262                           osg::NodeVisitor*)
 263   {
 264     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 265     osg::PolygonMode* polygonMode;
 266     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 267
 268     if (mWireframe->getBoolValue())
 269       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 270                            osg::PolygonMode::LINE);
 271     else
 272       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 273                            osg::PolygonMode::FILL);
 274   }
 275 private:
 276   SGSharedPtr<SGPropertyNode> mWireframe;
 277 };
 278
 279 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 280 public:
 281   FGLightModelUpdateCallback() :
 282     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 283   { }
 284   virtual void operator()(osg::StateAttribute* stateAttribute,
 285                           osg::NodeVisitor*)
 286   {
 287     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 288     osg::LightModel* lightModel;
 289     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 290
 291 #if 0
 292     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 293     lightModel->setAmbientIntensity(l->scene_ambient().osg());
 294 #else
 295     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 296 #endif
 297     lightModel->setTwoSided(true);
 298     lightModel->setLocalViewer(false);
 299
 300     if (mHighlights->getBoolValue()) {
 301       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 302     } else {
 303       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 304     }
 305   }
 306 private:
 307   SGSharedPtr<SGPropertyNode> mHighlights;
 308 };
 309
 310 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 311 public:
 312   FGFogEnableUpdateCallback() :
 313     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 314   { }
 315   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 316   {
 317     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 318       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 319     } else {
 320       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 321     }
 322   }
 323 private:
 324   SGSharedPtr<SGPropertyNode> mFogEnabled;
 325 };
 326
 327 // fog constants.  I'm a little nervous about putting actual code out
 328 // here but it seems to work (?)
 329 static const double m_log01 = -log( 0.01 );
 330 static const double sqrt_m_log01 = sqrt( m_log01 );
 331 static GLfloat fog_exp_density;
 332 static GLfloat fog_exp2_density;
 333 static GLfloat rwy_exp2_punch_through;
 334 static GLfloat taxi_exp2_punch_through;
 335 static GLfloat ground_exp2_punch_through;
 336
 337 // Sky structures
 338 SGSky *thesky;
 339
 340 osg::ref_ptr<osgUtil::SceneView> sceneView = new osgUtil::SceneView;  // This SceneView is used by class FGJpegHttpd ( jpg-httpd.cxx )
 341 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 342 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 343
 344 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 345
 346 static osg::ref_ptr<osg::CameraView> mCameraView = new osg::CameraView;
 347 static osg::ref_ptr<osg::Camera> mBackGroundCamera = new osg::Camera;
 348
 349 static osg::ref_ptr<osg::Fog> mFog = new osg::Fog;
 350 static osg::ref_ptr<osg::Fog> mRunwayLightingFog = new osg::Fog;
 351 static osg::ref_ptr<osg::Fog> mTaxiLightingFog = new osg::Fog;
 352 static osg::ref_ptr<osg::Fog> mGroundLightingFog = new osg::Fog;
 353
 354 FGRenderer::FGRenderer()
 355 {
 356 #ifdef FG_JPEG_SERVER
 357    jpgRenderFrame = FGRenderer::update;
 358 #endif
 359 }
 360
 361 FGRenderer::~FGRenderer()
 362 {
 363 #ifdef FG_JPEG_SERVER
 364    jpgRenderFrame = NULL;
 365 #endif
 366 }
 367
 368 // Initialize various GL/view parameters
 369 void
 370 FGRenderer::init( void ) {
 371
 372     osg::initNotifyLevel();
 373
 374     // The number of polygon-offset "units" to place between layers.  In
 375     // principle, one is supposed to be enough.  In practice, I find that
 376     // my hardware/driver requires many more.
 377     osg::PolygonOffset::setUnitsMultiplier(1);
 378     osg::PolygonOffset::setFactorMultiplier(1);
 379
 380     // Go full screen if requested ...
 381     if ( fgGetBool("/sim/startup/fullscreen") )
 382         fgOSFullScreen();
 383
 384     if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
 385          (!fgGetBool("/sim/rendering/shading"))) {
 386         // if fastest fog requested, or if flat shading force fastest
 387         glHint ( GL_FOG_HINT, GL_FASTEST );
 388     } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
 389         glHint ( GL_FOG_HINT, GL_DONT_CARE );
 390     }
 391
 392     glHint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 393     glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 394     glHint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 395
 396     sceneView->setDefaults(osgUtil::SceneView::COMPILE_GLOBJECTS_AT_INIT);
 397
 398     mFog->setMode(osg::Fog::EXP2);
 399     mRunwayLightingFog->setMode(osg::Fog::EXP2);
 400     mTaxiLightingFog->setMode(osg::Fog::EXP2);
 401     mGroundLightingFog->setMode(osg::Fog::EXP2);
 402
 403     sceneView->setFrameStamp(mFrameStamp.get());
 404
 405     mUpdateVisitor = new SGUpdateVisitor;
 406     sceneView->setUpdateVisitor(mUpdateVisitor.get());
 407
 408     sceneView->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 409     sceneView->getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 410
 411
 412     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 413
 414     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 415
 416     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 417     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 418
 419     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 420     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 421     stateSet->setAttribute(new osg::BlendFunc);
 422     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 423
 424     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 425
 426     // this will be set below
 427     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 428
 429     osg::Material* material = new osg::Material;
 430     stateSet->setAttribute(material);
 431
 432     stateSet->setTextureAttribute(0, new osg::TexEnv);
 433     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 434
 435
 436 //     stateSet->setAttribute(new osg::CullFace(osg::CullFace::BACK));
 437 //     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
 438
 439     // this is the topmost scenegraph node for osg
 440     mBackGroundCamera->addChild(thesky->getPreRoot());
 441     mBackGroundCamera->setClearMask(0);
 442
 443     GLbitfield inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 444     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 445     inheritanceMask &= ~osg::CullSettings::NEAR_FAR_RATIO;
 446     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 447     mBackGroundCamera->setInheritanceMask(inheritanceMask);
 448     mBackGroundCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 449     mBackGroundCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 450     mBackGroundCamera->setRenderOrder(osg::Camera::NESTED_RENDER);
 451
 452     stateSet = mBackGroundCamera->getOrCreateStateSet();
 453     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 454
 455     osg::Group* sceneGroup = new osg::Group;
 456     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 457     sceneGroup->addChild(thesky->getCloudRoot());
 458
 459     stateSet = sceneGroup->getOrCreateStateSet();
 460     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 461     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 462
 463     // need to update the light on every frame
 464     osg::LightSource* lightSource = new osg::LightSource;
 465     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 466     // relative because of CameraView being just a clever transform node
 467     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 468     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 469     mRoot->addChild(lightSource);
 470
 471     lightSource->addChild(mBackGroundCamera.get());
 472     lightSource->addChild(sceneGroup);
 473
 474
 475     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 476     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 477     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 478     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 479     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 480
 481     // enable disable specular highlights.
 482     // is the place where we might plug in an other fragment shader ...
 483     osg::LightModel* lightModel = new osg::LightModel;
 484     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 485     stateSet->setAttribute(lightModel);
 486
 487     // switch to enable wireframe
 488     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 489     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 490     stateSet->setAttributeAndModes(polygonMode);
 491
 492     // scene fog handling
 493     stateSet->setAttributeAndModes(mFog.get());
 494     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 495
 496     // plug in the GUI
 497     osg::Camera* guiCamera = new osg::Camera;
 498     guiCamera->setRenderOrder(osg::Camera::POST_RENDER);
 499     guiCamera->setClearMask(0);
 500     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 501     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 502     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 503     guiCamera->setInheritanceMask(inheritanceMask);
 504     guiCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 505     guiCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 506     mRoot->addChild(guiCamera);
 507     osg::Geode* geode = new osg::Geode;
 508     geode->addDrawable(new SGPuDrawable);
 509     geode->addDrawable(new SGHUDAndPanelDrawable);
 510     guiCamera->addChild(geode);
 511
 512     // this one contains all lights, here we set the light states we did
 513     // in the plib case with plain OpenGL
 514     osg::Group* lightGroup = new osg::Group;
 515     sceneGroup->addChild(lightGroup);
 516     lightGroup->addChild(globals->get_scenery()->get_gnd_lights_root());
 517     lightGroup->addChild(globals->get_scenery()->get_vasi_lights_root());
 518     lightGroup->addChild(globals->get_scenery()->get_rwy_lights_root());
 519     lightGroup->addChild(globals->get_scenery()->get_taxi_lights_root());
 520
 521     stateSet = globals->get_scenery()->get_gnd_lights_root()->getOrCreateStateSet();
 522     stateSet->setAttributeAndModes(mFog.get());
 523     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 524     stateSet = globals->get_scenery()->get_vasi_lights_root()->getOrCreateStateSet();
 525     stateSet->setAttributeAndModes(mRunwayLightingFog.get());
 526     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 527     stateSet = globals->get_scenery()->get_rwy_lights_root()->getOrCreateStateSet();
 528     stateSet->setAttributeAndModes(mRunwayLightingFog.get());
 529     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 530     stateSet = globals->get_scenery()->get_taxi_lights_root()->getOrCreateStateSet();
 531     stateSet->setAttributeAndModes(mTaxiLightingFog.get());
 532     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 533
 534     mCameraView->addChild(mRoot.get());
 535     sceneView->setSceneData(mCameraView.get());
 536
 537 //  sceneView->getState()->setCheckForGLErrors(osg::State::ONCE_PER_ATTRIBUTE);
 538 }
 539
 540
 541 // Update all Visuals (redraws anything graphics related)
 542 void
 543 FGRenderer::update( bool refresh_camera_settings ) {
 544     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 545                           || fgGetBool("sim/sceneryloaded-override");
 546
 547     if ( idle_state < 1000 || !scenery_loaded ) {
 548         if (sceneView.valid() && sceneView->getState()) {
 549             sceneView->getState()->setActiveTextureUnit(0);
 550             sceneView->getState()->setClientActiveTextureUnit(0);
 551             sceneView->getState()->disableAllVertexArrays();
 552         }
 553         // still initializing, draw the splash screen
 554         glPushAttrib(GL_ALL_ATTRIB_BITS);
 555         glPushClientAttrib(~0u);
 556
 557         fgSplashUpdate(1.0);
 558
 559         glPopClientAttrib();
 560         glPopAttrib();
 561
 562         // Keep resetting sim time while the sim is initializing
 563         globals->set_sim_time_sec( 0.0 );
 564         return;
 565     }
 566
 567     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 568     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 569     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 570     bool distance_attenuation
 571         = fgGetBool("/sim/rendering/distance-attenuation");
 572     // OSGFIXME
 573     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 574                                   distance_attenuation );
 575
 576     static const SGPropertyNode *groundlevel_nearplane
 577         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 578
 579     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 580
 581     // update fog params
 582     double actual_visibility;
 583     if (fgGetBool("/environment/clouds/status")) {
 584         actual_visibility = thesky->get_visibility();
 585     } else {
 586         actual_visibility = fgGetDouble("/environment/visibility-m");
 587     }
 588
 589     static double last_visibility = -9999;
 590     if ( actual_visibility != last_visibility ) {
 591         last_visibility = actual_visibility;
 592
 593         fog_exp_density = m_log01 / actual_visibility;
 594         fog_exp2_density = sqrt_m_log01 / actual_visibility;
 595         ground_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 596         if ( actual_visibility < 8000 ) {
 597             rwy_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 2.5);
 598             taxi_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 599         } else {
 600             rwy_exp2_punch_through = sqrt_m_log01 / ( 8000 * 2.5 );
 601             taxi_exp2_punch_through = sqrt_m_log01 / ( 8000 * 1.5 );
 602         }
 603         mFog->setDensity(fog_exp2_density);
 604         mRunwayLightingFog->setDensity(rwy_exp2_punch_through);
 605         mTaxiLightingFog->setDensity(taxi_exp2_punch_through);
 606         mGroundLightingFog->setDensity(ground_exp2_punch_through);
 607     }
 608
 609     // idle_state is now 1000 meaning we've finished all our
 610     // initializations and are running the main loop, so this will
 611     // now work without seg faulting the system.
 612
 613     FGViewer *current__view = globals->get_current_view();
 614     // Force update of center dependent values ...
 615     current__view->set_dirty();
 616
 617     if ( refresh_camera_settings ) {
 618         // update view port
 619         resize( fgGetInt("/sim/startup/xsize"),
 620                 fgGetInt("/sim/startup/ysize") );
 621
 622         SGVec3d center = globals->get_scenery()->get_center();
 623         SGVec3d position = current__view->getViewPosition();
 624         SGQuatd attitude = current__view->getViewOrientation();
 625         SGVec3d osgPosition = attitude.transform(center - position);
 626         mCameraView->setPosition(osgPosition.osg());
 627         mCameraView->setAttitude(inverse(attitude).osg());
 628     }
 629
 630     if ( skyblend ) {
 631         if ( fgGetBool("/sim/rendering/textures") ) {
 632             SGVec4f clearColor(l->adj_fog_color());
 633             sceneView->getCamera()->setClearColor(clearColor.osg());
 634         }
 635     } else {
 636         SGVec4f clearColor(l->sky_color());
 637         sceneView->getCamera()->setClearColor(clearColor.osg());
 638     }
 639
 640     // update fog params if visibility has changed
 641     double visibility_meters = fgGetDouble("/environment/visibility-m");
 642     thesky->set_visibility(visibility_meters);
 643
 644     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 645                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 646                         / (double)fgGetInt("/sim/model-hz") );
 647
 648     // update the sky dome
 649     if ( skyblend ) {
 650
 651         // The sun and moon distances are scaled down versions
 652         // of the actual distance to get both the moon and the sun
 653         // within the range of the far clip plane.
 654         // Moon distance:    384,467 kilometers
 655         // Sun distance: 150,000,000 kilometers
 656
 657         double sun_horiz_eff, moon_horiz_eff;
 658         if (fgGetBool("/sim/rendering/horizon-effect")) {
 659            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 660            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 661         } else {
 662            sun_horiz_eff = moon_horiz_eff = 1.0;
 663         }
 664
 665         static SGSkyState sstate;
 666
 667         sstate.view_pos  = current__view->get_view_pos();
 668         sstate.zero_elev = current__view->get_zero_elev();
 669         sstate.view_up   = current__view->get_world_up();
 670         sstate.lon       = current__view->getLongitude_deg()
 671                             * SGD_DEGREES_TO_RADIANS;
 672         sstate.lat       = current__view->getLatitude_deg()
 673                             * SGD_DEGREES_TO_RADIANS;
 674         sstate.alt       = current__view->getAltitudeASL_ft()
 675                             * SG_FEET_TO_METER;
 676         sstate.spin      = l->get_sun_rotation();
 677         sstate.gst       = globals->get_time_params()->getGst();
 678         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 679         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 680         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 681         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 682         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 683         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 684         sstate.sun_angle = l->get_sun_angle();
 685
 686
 687         /*
 688          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 689          << l->sky_color()[0] << " "
 690          << l->sky_color()[1] << " "
 691          << l->sky_color()[2] << " "
 692          << l->sky_color()[3] );
 693         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 694          << l->fog_color()[0] << " "
 695          << l->fog_color()[1] << " "
 696          << l->fog_color()[2] << " "
 697          << l->fog_color()[3] );
 698         SG_LOG( SG_GENERAL, SG_BULK,
 699                 "    sun_angle = " << l->sun_angle
 700          << "    moon_angle = " << l->moon_angle );
 701         */
 702
 703         static SGSkyColor scolor;
 704
 705         scolor.sky_color   = SGVec3f(l->sky_color().data());
 706         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 707         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 708         scolor.sun_angle   = l->get_sun_angle();
 709         scolor.moon_angle  = l->get_moon_angle();
 710         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 711         scolor.nstars      = globals->get_ephem()->getNumStars();
 712         scolor.planet_data = globals->get_ephem()->getPlanets();
 713         scolor.star_data   = globals->get_ephem()->getStars();
 714
 715         thesky->reposition( sstate, delta_time_sec );
 716         thesky->repaint( scolor );
 717
 718         /*
 719         SG_LOG( SG_GENERAL, SG_BULK,
 720                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 721          << view_pos[1] << " " << view_pos[2] );
 722         SG_LOG( SG_GENERAL, SG_BULK,
 723                 "    zero_elev = " << zero_elev[0] << " "
 724          << zero_elev[1] << " " << zero_elev[2]
 725          << " lon = " << cur_fdm_state->get_Longitude()
 726          << " lat = " << cur_fdm_state->get_Latitude() );
 727         SG_LOG( SG_GENERAL, SG_BULK,
 728                 "    sun_rot = " << l->get_sun_rotation
 729          << " gst = " << SGTime::cur_time_params->getGst() );
 730         SG_LOG( SG_GENERAL, SG_BULK,
 731              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 732           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 733           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 734           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 735         */
 736
 737         //OSGFIXME
 738 //         shadows->setupShadows(
 739 //           current__view->getLongitude_deg(),
 740 //           current__view->getLatitude_deg(),
 741 //           globals->get_time_params()->getGst(),
 742 //           globals->get_ephem()->getSunRightAscension(),
 743 //           globals->get_ephem()->getSunDeclination(),
 744 //           l->get_sun_angle());
 745
 746     }
 747
 748     if ( strcmp(fgGetString("/sim/rendering/fog"), "disabled") ) {
 749         SGVec4f color(l->adj_fog_color());
 750         mFog->setColor(color.osg());
 751         mRunwayLightingFog->setColor(color.osg());
 752         mTaxiLightingFog->setColor(color.osg());
 753         mGroundLightingFog->setColor(color.osg());
 754     }
 755
 756
 757 //     sgEnviro.setLight(l->adj_fog_color());
 758
 759     // texture parameters
 760     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
 761
 762     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 763       - current__view->getSGLocation()->get_cur_elev_m();
 764
 765     float scene_nearplane, scene_farplane;
 766     if ( agl > 10.0 ) {
 767         scene_nearplane = 10.0f;
 768         scene_farplane = 120000.0f;
 769     } else {
 770         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 771         scene_farplane = 120000.0f;
 772     }
 773     setNearFar( scene_nearplane, scene_farplane );
 774
 775 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 776 //         current__view->get_world_up(),
 777 //         current__view->getLongitude_deg(),
 778 //         current__view->getLatitude_deg(),
 779 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 780 //         delta_time_sec);
 781
 782     // OSGFIXME
 783 //     sgEnviro.drawLightning();
 784
 785 //        double current_view_origin_airspeed_horiz_kt =
 786 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 787 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 788 //                                * SGD_DEGREES_TO_RADIANS);
 789        // TODO:find the real view speed, not the AC one
 790 //     sgEnviro.drawPrecipitation(
 791 //         fgGetDouble("/environment/metar/rain-norm", 0.0),
 792 //         fgGetDouble("/environment/metar/snow-norm", 0.0),
 793 //         fgGetDouble("/environment/metar/hail-norm", 0.0),
 794 //         current__view->getPitch_deg() + current__view->getPitchOffset_deg(),
 795 //         current__view->getRoll_deg() + current__view->getRollOffset_deg(),
 796 //         - current__view->getHeadingOffset_deg(),
 797 //                current_view_origin_airspeed_horiz_kt
 798 //                );
 799
 800     // OSGFIXME
 801 //     if( is_internal )
 802 //         shadows->endOfFrame();
 803
 804     // need to call the update visitor once
 805     globals->get_aircraft_model()->select( true );
 806     FGTileMgr::set_tile_filter( true );
 807     mFrameStamp->setReferenceTime(globals->get_sim_time_sec());
 808     mFrameStamp->setFrameNumber(1+mFrameStamp->getFrameNumber());
 809     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 810     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 811                                 current__view->getViewOrientation());
 812     mUpdateVisitor->setSceneryCenter(globals->get_scenery()->get_center());
 813     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 814     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 815                              l->scene_diffuse(), l->scene_specular());
 816     mUpdateVisitor->setVisibility(actual_visibility);
 817
 818     if (fgGetBool("/sim/panel-hotspots"))
 819       sceneView->setCullMask(sceneView->getCullMask()|SG_NODEMASK_PICK_BIT);
 820     else
 821       sceneView->setCullMask(sceneView->getCullMask()&(~SG_NODEMASK_PICK_BIT));
 822
 823     sceneView->update();
 824     sceneView->cull();
 825     sceneView->draw();
 826 }
 827
 828
 829
 830 // options.cxx needs to see this for toggle_panel()
 831 // Handle new window size or exposure
 832 void
 833 FGRenderer::resize( int width, int height ) {
 834     int view_h;
 835
 836     if ( (!fgGetBool("/sim/virtual-cockpit"))
 837          && fgPanelVisible() && idle_state == 1000 ) {
 838         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 839                              globals->get_current_panel()->getYOffset()) / 768.0);
 840     } else {
 841         view_h = height;
 842     }
 843
 844     sceneView->getViewport()->setViewport(0, height - view_h, width, view_h);
 845
 846     static int lastwidth = 0;
 847     static int lastheight = 0;
 848     if (width != lastwidth)
 849         fgSetInt("/sim/startup/xsize", lastwidth = width);
 850     if (height != lastheight)
 851         fgSetInt("/sim/startup/ysize", lastheight = height);
 852
 853     guiInitMouse(width, height);
 854
 855     // for all views
 856     FGViewMgr *viewmgr = globals->get_viewmgr();
 857     if (viewmgr) {
 858       for ( int i = 0; i < viewmgr->size(); ++i ) {
 859         viewmgr->get_view(i)->
 860           set_aspect_ratio((float)view_h / (float)width);
 861       }
 862
 863       setFOV( viewmgr->get_current_view()->get_h_fov(),
 864               viewmgr->get_current_view()->get_v_fov() );
 865     }
 866 }
 867
 868
 869 // These are wrapper functions around ssgSetNearFar() and ssgSetFOV()
 870 // which will post process and rewrite the resulting frustum if we
 871 // want to do asymmetric view frustums.
 872
 873 static void fgHackFrustum() {
 874
 875     // specify a percent of the configured view frustum to actually
 876     // display.  This is a bit of a hack to achieve asymmetric view
 877     // frustums.  For instance, if you want to display two monitors
 878     // side by side, you could specify each with a double fov, a 0.5
 879     // aspect ratio multiplier, and then the left side monitor would
 880     // have a left_pct = 0.0, a right_pct = 0.5, a bottom_pct = 0.0,
 881     // and a top_pct = 1.0.  The right side monitor would have a
 882     // left_pct = 0.5 and a right_pct = 1.0.
 883
 884     static SGPropertyNode *left_pct
 885         = fgGetNode("/sim/current-view/frustum-left-pct");
 886     static SGPropertyNode *right_pct
 887         = fgGetNode("/sim/current-view/frustum-right-pct");
 888     static SGPropertyNode *bottom_pct
 889         = fgGetNode("/sim/current-view/frustum-bottom-pct");
 890     static SGPropertyNode *top_pct
 891         = fgGetNode("/sim/current-view/frustum-top-pct");
 892
 893     double left, right;
 894     double bottom, top;
 895     double zNear, zFar;
 896     sceneView->getProjectionMatrixAsFrustum(left, right, bottom, top, zNear, zFar);
 897     // cout << " l = " << f->getLeft()
 898     //      << " r = " << f->getRight()
 899     //      << " b = " << f->getBot()
 900     //      << " t = " << f->getTop()
 901     //      << " n = " << f->getNear()
 902     //      << " f = " << f->getFar()
 903     //      << endl;
 904
 905     double width = right - left;
 906     double height = top - bottom;
 907
 908     double l, r, t, b;
 909
 910     if ( left_pct != NULL ) {
 911         l = left + width * left_pct->getDoubleValue();
 912     } else {
 913         l = left;
 914     }
 915
 916     if ( right_pct != NULL ) {
 917         r = left + width * right_pct->getDoubleValue();
 918     } else {
 919         r = right;
 920     }
 921
 922     if ( bottom_pct != NULL ) {
 923         b = bottom + height * bottom_pct->getDoubleValue();
 924     } else {
 925         b = bottom;
 926     }
 927
 928     if ( top_pct != NULL ) {
 929         t = bottom + height * top_pct->getDoubleValue();
 930     } else {
 931         t = top;
 932     }
 933
 934     sceneView->setProjectionMatrixAsFrustum(l, r, b, t, zNear, zFar);
 935 }
 936
 937
 938 // we need some static storage space for these values.  However, we
 939 // can't store it in a renderer class object because the functions
 940 // that manipulate these are static.  They are static so they can
 941 // interface to the display callback system.  There's probably a
 942 // better way, there has to be a better way, but I'm not seeing it
 943 // right now.
 944 static float fov_width = 55.0;
 945 static float fov_height = 42.0;
 946 static float fov_near = 1.0;
 947 static float fov_far = 1000.0;
 948
 949
 950 /** FlightGear code should use this routine to set the FOV rather than
 951  *  calling the ssg routine directly
 952  */
 953 void FGRenderer::setFOV( float w, float h ) {
 954     fov_width = w;
 955     fov_height = h;
 956
 957     sceneView->setProjectionMatrixAsPerspective(fov_height,
 958                                                 fov_width/fov_height,
 959                                                 fov_near, fov_far);
 960     // fully specify the view frustum before hacking it (so we don't
 961     // accumulate hacked effects
 962     fgHackFrustum();
 963 //     sgEnviro.setFOV( w, h );
 964 }
 965
 966
 967 /** FlightGear code should use this routine to set the Near/Far clip
 968  *  planes rather than calling the ssg routine directly
 969  */
 970 void FGRenderer::setNearFar( float n, float f ) {
 971 // OSGFIXME: we have currently too much z-buffer fights
 972 n = 0.1;
 973     fov_near = n;
 974     fov_far = f;
 975
 976     sceneView->setProjectionMatrixAsPerspective(fov_height,
 977                                                 fov_width/fov_height,
 978                                                 fov_near, fov_far);
 979
 980     // fully specify the view frustum before hacking it (so we don't
 981     // accumulate hacked effects
 982     fgHackFrustum();
 983 }
 984
 985 bool
 986 FGRenderer::pick( unsigned x, unsigned y,
 987                   std::vector<SGSceneryPick>& pickList )
 988 {
 989   // wipe out the return ...
 990   pickList.resize(0);
 991
 992   // we can get called early ...
 993   if (!sceneView.valid())
 994     return false;
 995
 996   osg::Node* sceneData = globals->get_scenery()->get_scene_graph();
 997   if (!sceneData)
 998     return false;
 999   osg::Viewport* viewport = sceneView->getViewport();
1000   if (!viewport)
1001     return false;
1002
1003   // good old scenery center
1004   SGVec3d center = globals->get_scenery()->get_center();
1005
1006   // don't know why, but the update has partly happened somehow,
1007   // so update the scenery part of the viewer
1008   FGViewer *current_view = globals->get_current_view();
1009   // Force update of center dependent values ...
1010   current_view->set_dirty();
1011   SGVec3d position = current_view->getViewPosition();
1012   SGQuatd attitude = current_view->getViewOrientation();
1013   SGVec3d osgPosition = attitude.transform(center - position);
1014   mCameraView->setPosition(osgPosition.osg());
1015   mCameraView->setAttitude(inverse(attitude).osg());
1016
1017   osg::Matrix projection(sceneView->getProjectionMatrix());
1018   osg::Matrix modelview(sceneView->getViewMatrix());
1019
1020   osg::NodePathList nodePath = sceneData->getParentalNodePaths();
1021   // modify the view matrix so that it accounts for this nodePath's
1022   // accumulated transform
1023   if (!nodePath.empty())
1024     modelview.preMult(computeLocalToWorld(nodePath.front()));
1025
1026   // swap the y values ...
1027   y = viewport->height() - y;
1028   // set up the pick visitor
1029   osgUtil::PickVisitor pickVisitor(viewport, projection, modelview, x, y);
1030   sceneData->accept(pickVisitor);
1031   if (!pickVisitor.hits())
1032     return false;
1033
1034   // collect all interaction callbacks on the pick ray.
1035   // They get stored in the pickCallbacks list where they are sorted back
1036   // to front and croasest to finest wrt the scenery node they are attached to
1037   osgUtil::PickVisitor::LineSegmentHitListMap::const_iterator mi;
1038   for (mi = pickVisitor.getSegHitList().begin();
1039        mi != pickVisitor.getSegHitList().end();
1040        ++mi) {
1041     osgUtil::IntersectVisitor::HitList::const_iterator hi;
1042     for (hi = mi->second.begin(); hi != mi->second.end(); ++hi) {
1043       // ok, go back the nodes and ask for intersection callbacks,
1044       // execute them in top down order
1045       const osg::NodePath& np = hi->getNodePath();
1046       osg::NodePath::const_reverse_iterator npi;
1047       for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1048         SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1049         if (!ud)
1050           continue;
1051         for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1052           SGPickCallback* pickCallback = ud->getPickCallback(i);
1053           if (!pickCallback)
1054             continue;
1055           SGSceneryPick sceneryPick;
1056           /// note that this is done totally in doubles instead of
1057           /// just using getWorldIntersectionPoint
1058           osg::Vec3d localPt = hi->getLocalIntersectPoint();
1059           sceneryPick.info.local = SGVec3d(localPt);
1060           if (hi->getMatrix())
1061             sceneryPick.info.wgs84 = SGVec3d(localPt*(*hi->getMatrix()));
1062           else
1063             sceneryPick.info.wgs84 = SGVec3d(localPt);
1064           sceneryPick.info.wgs84 += globals->get_scenery()->get_center();
1065           sceneryPick.callback = pickCallback;
1066           pickList.push_back(sceneryPick);
1067         }
1068       }
1069     }
1070   }
1071
1072   return !pickList.empty();
1073 }
1074
1075 // end of renderer.cxx
1076