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     } else {
 157       fgSplashExit();
 158     }
 159
 160     state.popStateSet();
 161     state.dirtyAllModes();
 162     state.dirtyAllAttributes();
 163     state.dirtyAllVertexArrays();
 164   }
 165
 166   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 167   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 168
 169 private:
 170 };
 171
 172 class SGHUDAndPanelDrawable : public osg::Drawable {
 173 public:
 174   SGHUDAndPanelDrawable()
 175   {
 176     // Dynamic stuff, do not store geometry
 177     setUseDisplayList(false);
 178
 179     osg::StateSet* stateSet = getOrCreateStateSet();
 180     stateSet->setRenderBinDetails(1000, "RenderBin");
 181
 182     // speed optimization?
 183     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 184     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 185     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 186     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 187     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 188
 189     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 190   }
 191   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 192   { drawImplementation(*renderInfo.getState()); }
 193   void drawImplementation(osg::State& state) const
 194   {
 195     state.pushStateSet(getStateSet());
 196     state.apply();
 197     state.setActiveTextureUnit(0);
 198     state.setClientActiveTextureUnit(0);
 199     state.disableAllVertexArrays();
 200
 201     glPushAttrib(GL_ALL_ATTRIB_BITS);
 202     glPushClientAttrib(~0u);
 203
 204     fgCockpitUpdate(&state);
 205
 206     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 207     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 208     hud->draw(state);
 209
 210     // update the panel subsystem
 211     if ( globals->get_current_panel() != NULL )
 212         globals->get_current_panel()->update(state);
 213     // We don't need a state here - can be safely removed when we can pick
 214     // correctly
 215     fgUpdate3DPanels();
 216
 217     glPopClientAttrib();
 218     glPopAttrib();
 219
 220     state.popStateSet();
 221     state.dirtyAllModes();
 222     state.dirtyAllAttributes();
 223     state.dirtyAllVertexArrays();
 224   }
 225
 226   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 227   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 228
 229 private:
 230 };
 231
 232 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 233 public:
 234   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 235   {
 236     assert(dynamic_cast<osg::LightSource*>(node));
 237     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 238     osg::Light* light = lightSource->getLight();
 239
 240     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 241     light->setAmbient(l->scene_ambient().osg());
 242     light->setDiffuse(l->scene_diffuse().osg());
 243     light->setSpecular(l->scene_specular().osg());
 244     SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 245     light->setPosition(position.osg());
 246     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 247     light->setDirection(direction.osg());
 248     light->setSpotExponent(0);
 249     light->setSpotCutoff(180);
 250     light->setConstantAttenuation(1);
 251     light->setLinearAttenuation(0);
 252     light->setQuadraticAttenuation(0);
 253
 254     traverse(node, nv);
 255   }
 256 };
 257
 258 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 259 public:
 260   FGWireFrameModeUpdateCallback() :
 261     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 262   { }
 263   virtual void operator()(osg::StateAttribute* stateAttribute,
 264                           osg::NodeVisitor*)
 265   {
 266     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 267     osg::PolygonMode* polygonMode;
 268     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 269
 270     if (mWireframe->getBoolValue())
 271       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 272                            osg::PolygonMode::LINE);
 273     else
 274       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 275                            osg::PolygonMode::FILL);
 276   }
 277 private:
 278   SGSharedPtr<SGPropertyNode> mWireframe;
 279 };
 280
 281 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 282 public:
 283   FGLightModelUpdateCallback() :
 284     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 285   { }
 286   virtual void operator()(osg::StateAttribute* stateAttribute,
 287                           osg::NodeVisitor*)
 288   {
 289     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 290     osg::LightModel* lightModel;
 291     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 292
 293 #if 0
 294     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 295     lightModel->setAmbientIntensity(l->scene_ambient().osg());
 296 #else
 297     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 298 #endif
 299     lightModel->setTwoSided(true);
 300     lightModel->setLocalViewer(false);
 301
 302     if (mHighlights->getBoolValue()) {
 303       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 304     } else {
 305       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 306     }
 307   }
 308 private:
 309   SGSharedPtr<SGPropertyNode> mHighlights;
 310 };
 311
 312 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 313 public:
 314   FGFogEnableUpdateCallback() :
 315     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 316   { }
 317   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 318   {
 319     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 320       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 321     } else {
 322       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 323     }
 324   }
 325 private:
 326   SGSharedPtr<SGPropertyNode> mFogEnabled;
 327 };
 328
 329 // fog constants.  I'm a little nervous about putting actual code out
 330 // here but it seems to work (?)
 331 static const double m_log01 = -log( 0.01 );
 332 static const double sqrt_m_log01 = sqrt( m_log01 );
 333 static GLfloat fog_exp_density;
 334 static GLfloat fog_exp2_density;
 335 static GLfloat rwy_exp2_punch_through;
 336 static GLfloat taxi_exp2_punch_through;
 337 static GLfloat ground_exp2_punch_through;
 338
 339 // Sky structures
 340 SGSky *thesky;
 341
 342 osg::ref_ptr<osgUtil::SceneView> sceneView = new osgUtil::SceneView;  // This SceneView is used by class FGJpegHttpd ( jpg-httpd.cxx )
 343 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 344 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 345
 346 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 347
 348 static osg::ref_ptr<osg::CameraView> mCameraView = new osg::CameraView;
 349 static osg::ref_ptr<osg::Camera> mBackGroundCamera = new osg::Camera;
 350
 351 static osg::ref_ptr<osg::Fog> mFog = new osg::Fog;
 352 static osg::ref_ptr<osg::Fog> mRunwayLightingFog = new osg::Fog;
 353 static osg::ref_ptr<osg::Fog> mTaxiLightingFog = new osg::Fog;
 354 static osg::ref_ptr<osg::Fog> mGroundLightingFog = new osg::Fog;
 355
 356 FGRenderer::FGRenderer()
 357 {
 358 #ifdef FG_JPEG_SERVER
 359    jpgRenderFrame = FGRenderer::update;
 360 #endif
 361 }
 362
 363 FGRenderer::~FGRenderer()
 364 {
 365 #ifdef FG_JPEG_SERVER
 366    jpgRenderFrame = NULL;
 367 #endif
 368 }
 369
 370 // Initialize various GL/view parameters
 371 void
 372 FGRenderer::init( void ) {
 373
 374     osg::initNotifyLevel();
 375
 376     // The number of polygon-offset "units" to place between layers.  In
 377     // principle, one is supposed to be enough.  In practice, I find that
 378     // my hardware/driver requires many more.
 379     osg::PolygonOffset::setUnitsMultiplier(1);
 380     osg::PolygonOffset::setFactorMultiplier(1);
 381
 382     // Go full screen if requested ...
 383     if ( fgGetBool("/sim/startup/fullscreen") )
 384         fgOSFullScreen();
 385
 386     if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
 387          (!fgGetBool("/sim/rendering/shading"))) {
 388         // if fastest fog requested, or if flat shading force fastest
 389         glHint ( GL_FOG_HINT, GL_FASTEST );
 390     } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
 391         glHint ( GL_FOG_HINT, GL_DONT_CARE );
 392     }
 393
 394     glHint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 395     glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 396     glHint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 397
 398     sceneView->setDefaults(osgUtil::SceneView::COMPILE_GLOBJECTS_AT_INIT);
 399
 400     mFog->setMode(osg::Fog::EXP2);
 401     mRunwayLightingFog->setMode(osg::Fog::EXP2);
 402     mTaxiLightingFog->setMode(osg::Fog::EXP2);
 403     mGroundLightingFog->setMode(osg::Fog::EXP2);
 404
 405     sceneView->setFrameStamp(mFrameStamp.get());
 406
 407     mUpdateVisitor = new SGUpdateVisitor;
 408     sceneView->setUpdateVisitor(mUpdateVisitor.get());
 409
 410     sceneView->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 411     sceneView->getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 412
 413
 414     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 415
 416     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 417
 418     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 419     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 420
 421     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 422     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 423     stateSet->setAttribute(new osg::BlendFunc);
 424     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 425
 426     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 427
 428     // this will be set below
 429     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 430
 431     osg::Material* material = new osg::Material;
 432     stateSet->setAttribute(material);
 433
 434     stateSet->setTextureAttribute(0, new osg::TexEnv);
 435     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 436
 437
 438 //     stateSet->setAttribute(new osg::CullFace(osg::CullFace::BACK));
 439 //     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
 440
 441     // this is the topmost scenegraph node for osg
 442     mBackGroundCamera->addChild(thesky->getPreRoot());
 443     mBackGroundCamera->setClearMask(0);
 444
 445     GLbitfield inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 446     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 447     inheritanceMask &= ~osg::CullSettings::NEAR_FAR_RATIO;
 448     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 449     mBackGroundCamera->setInheritanceMask(inheritanceMask);
 450     mBackGroundCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 451     mBackGroundCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 452     mBackGroundCamera->setRenderOrder(osg::Camera::NESTED_RENDER);
 453
 454     stateSet = mBackGroundCamera->getOrCreateStateSet();
 455     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 456
 457     osg::Group* sceneGroup = new osg::Group;
 458     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 459     sceneGroup->addChild(thesky->getCloudRoot());
 460
 461     stateSet = sceneGroup->getOrCreateStateSet();
 462     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 463     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 464
 465     // need to update the light on every frame
 466     osg::LightSource* lightSource = new osg::LightSource;
 467     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 468     // relative because of CameraView being just a clever transform node
 469     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 470     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 471     mRoot->addChild(lightSource);
 472
 473     lightSource->addChild(mBackGroundCamera.get());
 474     lightSource->addChild(sceneGroup);
 475
 476
 477     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 478     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 479     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 480     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 481     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 482
 483     // enable disable specular highlights.
 484     // is the place where we might plug in an other fragment shader ...
 485     osg::LightModel* lightModel = new osg::LightModel;
 486     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 487     stateSet->setAttribute(lightModel);
 488
 489     // switch to enable wireframe
 490     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 491     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 492     stateSet->setAttributeAndModes(polygonMode);
 493
 494     // scene fog handling
 495     stateSet->setAttributeAndModes(mFog.get());
 496     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 497
 498     // plug in the GUI
 499     osg::Camera* guiCamera = new osg::Camera;
 500     guiCamera->setRenderOrder(osg::Camera::POST_RENDER);
 501     guiCamera->setClearMask(0);
 502     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 503     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 504     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 505     guiCamera->setInheritanceMask(inheritanceMask);
 506     guiCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 507     guiCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 508     mRoot->addChild(guiCamera);
 509     osg::Geode* geode = new osg::Geode;
 510     geode->addDrawable(new SGPuDrawable);
 511     geode->addDrawable(new SGHUDAndPanelDrawable);
 512     guiCamera->addChild(geode);
 513
 514     // this one contains all lights, here we set the light states we did
 515     // in the plib case with plain OpenGL
 516     osg::Group* lightGroup = new osg::Group;
 517     sceneGroup->addChild(lightGroup);
 518     lightGroup->addChild(globals->get_scenery()->get_gnd_lights_root());
 519     lightGroup->addChild(globals->get_scenery()->get_vasi_lights_root());
 520     lightGroup->addChild(globals->get_scenery()->get_rwy_lights_root());
 521     lightGroup->addChild(globals->get_scenery()->get_taxi_lights_root());
 522
 523     stateSet = globals->get_scenery()->get_gnd_lights_root()->getOrCreateStateSet();
 524     stateSet->setAttributeAndModes(mFog.get());
 525     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 526     stateSet = globals->get_scenery()->get_vasi_lights_root()->getOrCreateStateSet();
 527     stateSet->setAttributeAndModes(mRunwayLightingFog.get());
 528     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 529     stateSet = globals->get_scenery()->get_rwy_lights_root()->getOrCreateStateSet();
 530     stateSet->setAttributeAndModes(mRunwayLightingFog.get());
 531     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 532     stateSet = globals->get_scenery()->get_taxi_lights_root()->getOrCreateStateSet();
 533     stateSet->setAttributeAndModes(mTaxiLightingFog.get());
 534     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 535
 536     mCameraView->addChild(mRoot.get());
 537     sceneView->setSceneData(mCameraView.get());
 538
 539 //  sceneView->getState()->setCheckForGLErrors(osg::State::ONCE_PER_ATTRIBUTE);
 540 }
 541
 542
 543 // Update all Visuals (redraws anything graphics related)
 544 void
 545 FGRenderer::update( bool refresh_camera_settings ) {
 546     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 547                           || fgGetBool("sim/sceneryloaded-override");
 548
 549     if ( idle_state < 1000 || !scenery_loaded ) {
 550         if (sceneView.valid() && sceneView->getState()) {
 551             sceneView->getState()->setActiveTextureUnit(0);
 552             sceneView->getState()->setClientActiveTextureUnit(0);
 553             sceneView->getState()->disableAllVertexArrays();
 554         }
 555         // still initializing, draw the splash screen
 556         glPushAttrib(GL_ALL_ATTRIB_BITS);
 557         glPushClientAttrib(~0u);
 558
 559         fgSplashUpdate(1.0);
 560
 561         glPopClientAttrib();
 562         glPopAttrib();
 563
 564         // Keep resetting sim time while the sim is initializing
 565         globals->set_sim_time_sec( 0.0 );
 566         return;
 567     }
 568
 569     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 570     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 571     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 572     bool distance_attenuation
 573         = fgGetBool("/sim/rendering/distance-attenuation");
 574     // OSGFIXME
 575     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 576                                   distance_attenuation );
 577
 578     static const SGPropertyNode *groundlevel_nearplane
 579         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 580
 581     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 582
 583     // update fog params
 584     double actual_visibility;
 585     if (fgGetBool("/environment/clouds/status")) {
 586         actual_visibility = thesky->get_visibility();
 587     } else {
 588         actual_visibility = fgGetDouble("/environment/visibility-m");
 589     }
 590
 591     static double last_visibility = -9999;
 592     if ( actual_visibility != last_visibility ) {
 593         last_visibility = actual_visibility;
 594
 595         fog_exp_density = m_log01 / actual_visibility;
 596         fog_exp2_density = sqrt_m_log01 / actual_visibility;
 597         ground_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 598         if ( actual_visibility < 8000 ) {
 599             rwy_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 2.5);
 600             taxi_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 601         } else {
 602             rwy_exp2_punch_through = sqrt_m_log01 / ( 8000 * 2.5 );
 603             taxi_exp2_punch_through = sqrt_m_log01 / ( 8000 * 1.5 );
 604         }
 605         mFog->setDensity(fog_exp2_density);
 606         mRunwayLightingFog->setDensity(rwy_exp2_punch_through);
 607         mTaxiLightingFog->setDensity(taxi_exp2_punch_through);
 608         mGroundLightingFog->setDensity(ground_exp2_punch_through);
 609     }
 610
 611     // idle_state is now 1000 meaning we've finished all our
 612     // initializations and are running the main loop, so this will
 613     // now work without seg faulting the system.
 614
 615     FGViewer *current__view = globals->get_current_view();
 616     // Force update of center dependent values ...
 617     current__view->set_dirty();
 618
 619     if ( refresh_camera_settings ) {
 620         // update view port
 621         resize( fgGetInt("/sim/startup/xsize"),
 622                 fgGetInt("/sim/startup/ysize") );
 623
 624         SGVec3d center = globals->get_scenery()->get_center();
 625         SGVec3d position = current__view->getViewPosition();
 626         SGQuatd attitude = current__view->getViewOrientation();
 627         SGVec3d osgPosition = attitude.transform(center - position);
 628         mCameraView->setPosition(osgPosition.osg());
 629         mCameraView->setAttitude(inverse(attitude).osg());
 630     }
 631
 632     if ( skyblend ) {
 633         if ( fgGetBool("/sim/rendering/textures") ) {
 634             SGVec4f clearColor(l->adj_fog_color());
 635             sceneView->getCamera()->setClearColor(clearColor.osg());
 636         }
 637     } else {
 638         SGVec4f clearColor(l->sky_color());
 639         sceneView->getCamera()->setClearColor(clearColor.osg());
 640     }
 641
 642     // update fog params if visibility has changed
 643     double visibility_meters = fgGetDouble("/environment/visibility-m");
 644     thesky->set_visibility(visibility_meters);
 645
 646     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 647                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 648                         / (double)fgGetInt("/sim/model-hz") );
 649
 650     // update the sky dome
 651     if ( skyblend ) {
 652
 653         // The sun and moon distances are scaled down versions
 654         // of the actual distance to get both the moon and the sun
 655         // within the range of the far clip plane.
 656         // Moon distance:    384,467 kilometers
 657         // Sun distance: 150,000,000 kilometers
 658
 659         double sun_horiz_eff, moon_horiz_eff;
 660         if (fgGetBool("/sim/rendering/horizon-effect")) {
 661            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 662            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 663         } else {
 664            sun_horiz_eff = moon_horiz_eff = 1.0;
 665         }
 666
 667         static SGSkyState sstate;
 668
 669         sstate.view_pos  = current__view->get_view_pos();
 670         sstate.zero_elev = current__view->get_zero_elev();
 671         sstate.view_up   = current__view->get_world_up();
 672         sstate.lon       = current__view->getLongitude_deg()
 673                             * SGD_DEGREES_TO_RADIANS;
 674         sstate.lat       = current__view->getLatitude_deg()
 675                             * SGD_DEGREES_TO_RADIANS;
 676         sstate.alt       = current__view->getAltitudeASL_ft()
 677                             * SG_FEET_TO_METER;
 678         sstate.spin      = l->get_sun_rotation();
 679         sstate.gst       = globals->get_time_params()->getGst();
 680         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 681         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 682         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 683         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 684         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 685         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 686         sstate.sun_angle = l->get_sun_angle();
 687
 688
 689         /*
 690          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 691          << l->sky_color()[0] << " "
 692          << l->sky_color()[1] << " "
 693          << l->sky_color()[2] << " "
 694          << l->sky_color()[3] );
 695         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 696          << l->fog_color()[0] << " "
 697          << l->fog_color()[1] << " "
 698          << l->fog_color()[2] << " "
 699          << l->fog_color()[3] );
 700         SG_LOG( SG_GENERAL, SG_BULK,
 701                 "    sun_angle = " << l->sun_angle
 702          << "    moon_angle = " << l->moon_angle );
 703         */
 704
 705         static SGSkyColor scolor;
 706
 707         scolor.sky_color   = SGVec3f(l->sky_color().data());
 708         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 709         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 710         scolor.sun_angle   = l->get_sun_angle();
 711         scolor.moon_angle  = l->get_moon_angle();
 712         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 713         scolor.nstars      = globals->get_ephem()->getNumStars();
 714         scolor.planet_data = globals->get_ephem()->getPlanets();
 715         scolor.star_data   = globals->get_ephem()->getStars();
 716
 717         thesky->reposition( sstate, delta_time_sec );
 718         thesky->repaint( scolor );
 719
 720         /*
 721         SG_LOG( SG_GENERAL, SG_BULK,
 722                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 723          << view_pos[1] << " " << view_pos[2] );
 724         SG_LOG( SG_GENERAL, SG_BULK,
 725                 "    zero_elev = " << zero_elev[0] << " "
 726          << zero_elev[1] << " " << zero_elev[2]
 727          << " lon = " << cur_fdm_state->get_Longitude()
 728          << " lat = " << cur_fdm_state->get_Latitude() );
 729         SG_LOG( SG_GENERAL, SG_BULK,
 730                 "    sun_rot = " << l->get_sun_rotation
 731          << " gst = " << SGTime::cur_time_params->getGst() );
 732         SG_LOG( SG_GENERAL, SG_BULK,
 733              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 734           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 735           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 736           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 737         */
 738
 739         //OSGFIXME
 740 //         shadows->setupShadows(
 741 //           current__view->getLongitude_deg(),
 742 //           current__view->getLatitude_deg(),
 743 //           globals->get_time_params()->getGst(),
 744 //           globals->get_ephem()->getSunRightAscension(),
 745 //           globals->get_ephem()->getSunDeclination(),
 746 //           l->get_sun_angle());
 747
 748     }
 749
 750     if ( strcmp(fgGetString("/sim/rendering/fog"), "disabled") ) {
 751         SGVec4f color(l->adj_fog_color());
 752         mFog->setColor(color.osg());
 753         mRunwayLightingFog->setColor(color.osg());
 754         mTaxiLightingFog->setColor(color.osg());
 755         mGroundLightingFog->setColor(color.osg());
 756     }
 757
 758
 759 //     sgEnviro.setLight(l->adj_fog_color());
 760
 761     // texture parameters
 762     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
 763
 764     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 765       - current__view->getSGLocation()->get_cur_elev_m();
 766
 767     float scene_nearplane, scene_farplane;
 768     if ( agl > 10.0 ) {
 769         scene_nearplane = 10.0f;
 770         scene_farplane = 120000.0f;
 771     } else {
 772         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 773         scene_farplane = 120000.0f;
 774     }
 775     setNearFar( scene_nearplane, scene_farplane );
 776
 777 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 778 //         current__view->get_world_up(),
 779 //         current__view->getLongitude_deg(),
 780 //         current__view->getLatitude_deg(),
 781 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 782 //         delta_time_sec);
 783
 784     // OSGFIXME
 785 //     sgEnviro.drawLightning();
 786
 787 //        double current_view_origin_airspeed_horiz_kt =
 788 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 789 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 790 //                                * SGD_DEGREES_TO_RADIANS);
 791        // TODO:find the real view speed, not the AC one
 792 //     sgEnviro.drawPrecipitation(
 793 //         fgGetDouble("/environment/metar/rain-norm", 0.0),
 794 //         fgGetDouble("/environment/metar/snow-norm", 0.0),
 795 //         fgGetDouble("/environment/metar/hail-norm", 0.0),
 796 //         current__view->getPitch_deg() + current__view->getPitchOffset_deg(),
 797 //         current__view->getRoll_deg() + current__view->getRollOffset_deg(),
 798 //         - current__view->getHeadingOffset_deg(),
 799 //                current_view_origin_airspeed_horiz_kt
 800 //                );
 801
 802     // OSGFIXME
 803 //     if( is_internal )
 804 //         shadows->endOfFrame();
 805
 806     // need to call the update visitor once
 807     globals->get_aircraft_model()->select( true );
 808     FGTileMgr::set_tile_filter( true );
 809     mFrameStamp->setReferenceTime(globals->get_sim_time_sec());
 810     mFrameStamp->setFrameNumber(1+mFrameStamp->getFrameNumber());
 811     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 812     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 813                                 current__view->getViewOrientation());
 814     mUpdateVisitor->setSceneryCenter(globals->get_scenery()->get_center());
 815     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 816     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 817                              l->scene_diffuse(), l->scene_specular());
 818     mUpdateVisitor->setVisibility(actual_visibility);
 819
 820     if (fgGetBool("/sim/panel-hotspots"))
 821       sceneView->setCullMask(sceneView->getCullMask()|SG_NODEMASK_PICK_BIT);
 822     else
 823       sceneView->setCullMask(sceneView->getCullMask()&(~SG_NODEMASK_PICK_BIT));
 824
 825     sceneView->update();
 826     sceneView->cull();
 827     sceneView->draw();
 828 }
 829
 830
 831
 832 // options.cxx needs to see this for toggle_panel()
 833 // Handle new window size or exposure
 834 void
 835 FGRenderer::resize( int width, int height ) {
 836     int view_h;
 837
 838     if ( (!fgGetBool("/sim/virtual-cockpit"))
 839          && fgPanelVisible() && idle_state == 1000 ) {
 840         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 841                              globals->get_current_panel()->getYOffset()) / 768.0);
 842     } else {
 843         view_h = height;
 844     }
 845
 846     sceneView->getViewport()->setViewport(0, height - view_h, width, view_h);
 847
 848     static int lastwidth = 0;
 849     static int lastheight = 0;
 850     if (width != lastwidth)
 851         fgSetInt("/sim/startup/xsize", lastwidth = width);
 852     if (height != lastheight)
 853         fgSetInt("/sim/startup/ysize", lastheight = height);
 854
 855     guiInitMouse(width, height);
 856
 857     // for all views
 858     FGViewMgr *viewmgr = globals->get_viewmgr();
 859     if (viewmgr) {
 860       for ( int i = 0; i < viewmgr->size(); ++i ) {
 861         viewmgr->get_view(i)->
 862           set_aspect_ratio((float)view_h / (float)width);
 863       }
 864
 865       setFOV( viewmgr->get_current_view()->get_h_fov(),
 866               viewmgr->get_current_view()->get_v_fov() );
 867     }
 868 }
 869
 870
 871 // These are wrapper functions around ssgSetNearFar() and ssgSetFOV()
 872 // which will post process and rewrite the resulting frustum if we
 873 // want to do asymmetric view frustums.
 874
 875 static void fgHackFrustum() {
 876
 877     // specify a percent of the configured view frustum to actually
 878     // display.  This is a bit of a hack to achieve asymmetric view
 879     // frustums.  For instance, if you want to display two monitors
 880     // side by side, you could specify each with a double fov, a 0.5
 881     // aspect ratio multiplier, and then the left side monitor would
 882     // have a left_pct = 0.0, a right_pct = 0.5, a bottom_pct = 0.0,
 883     // and a top_pct = 1.0.  The right side monitor would have a
 884     // left_pct = 0.5 and a right_pct = 1.0.
 885
 886     static SGPropertyNode *left_pct
 887         = fgGetNode("/sim/current-view/frustum-left-pct");
 888     static SGPropertyNode *right_pct
 889         = fgGetNode("/sim/current-view/frustum-right-pct");
 890     static SGPropertyNode *bottom_pct
 891         = fgGetNode("/sim/current-view/frustum-bottom-pct");
 892     static SGPropertyNode *top_pct
 893         = fgGetNode("/sim/current-view/frustum-top-pct");
 894
 895     double left, right;
 896     double bottom, top;
 897     double zNear, zFar;
 898     sceneView->getProjectionMatrixAsFrustum(left, right, bottom, top, zNear, zFar);
 899     // cout << " l = " << f->getLeft()
 900     //      << " r = " << f->getRight()
 901     //      << " b = " << f->getBot()
 902     //      << " t = " << f->getTop()
 903     //      << " n = " << f->getNear()
 904     //      << " f = " << f->getFar()
 905     //      << endl;
 906
 907     double width = right - left;
 908     double height = top - bottom;
 909
 910     double l, r, t, b;
 911
 912     if ( left_pct != NULL ) {
 913         l = left + width * left_pct->getDoubleValue();
 914     } else {
 915         l = left;
 916     }
 917
 918     if ( right_pct != NULL ) {
 919         r = left + width * right_pct->getDoubleValue();
 920     } else {
 921         r = right;
 922     }
 923
 924     if ( bottom_pct != NULL ) {
 925         b = bottom + height * bottom_pct->getDoubleValue();
 926     } else {
 927         b = bottom;
 928     }
 929
 930     if ( top_pct != NULL ) {
 931         t = bottom + height * top_pct->getDoubleValue();
 932     } else {
 933         t = top;
 934     }
 935
 936     sceneView->setProjectionMatrixAsFrustum(l, r, b, t, zNear, zFar);
 937 }
 938
 939
 940 // we need some static storage space for these values.  However, we
 941 // can't store it in a renderer class object because the functions
 942 // that manipulate these are static.  They are static so they can
 943 // interface to the display callback system.  There's probably a
 944 // better way, there has to be a better way, but I'm not seeing it
 945 // right now.
 946 static float fov_width = 55.0;
 947 static float fov_height = 42.0;
 948 static float fov_near = 1.0;
 949 static float fov_far = 1000.0;
 950
 951
 952 /** FlightGear code should use this routine to set the FOV rather than
 953  *  calling the ssg routine directly
 954  */
 955 void FGRenderer::setFOV( float w, float h ) {
 956     fov_width = w;
 957     fov_height = h;
 958
 959     sceneView->setProjectionMatrixAsPerspective(fov_height,
 960                                                 fov_width/fov_height,
 961                                                 fov_near, fov_far);
 962     // fully specify the view frustum before hacking it (so we don't
 963     // accumulate hacked effects
 964     fgHackFrustum();
 965 //     sgEnviro.setFOV( w, h );
 966 }
 967
 968
 969 /** FlightGear code should use this routine to set the Near/Far clip
 970  *  planes rather than calling the ssg routine directly
 971  */
 972 void FGRenderer::setNearFar( float n, float f ) {
 973 // OSGFIXME: we have currently too much z-buffer fights
 974 n = 0.1;
 975     fov_near = n;
 976     fov_far = f;
 977
 978     sceneView->setProjectionMatrixAsPerspective(fov_height,
 979                                                 fov_width/fov_height,
 980                                                 fov_near, fov_far);
 981
 982     // fully specify the view frustum before hacking it (so we don't
 983     // accumulate hacked effects
 984     fgHackFrustum();
 985 }
 986
 987 bool
 988 FGRenderer::pick( unsigned x, unsigned y,
 989                   std::vector<SGSceneryPick>& pickList )
 990 {
 991   // wipe out the return ...
 992   pickList.resize(0);
 993
 994   // we can get called early ...
 995   if (!sceneView.valid())
 996     return false;
 997
 998   osg::Node* sceneData = globals->get_scenery()->get_scene_graph();
 999   if (!sceneData)
1000     return false;
1001   osg::Viewport* viewport = sceneView->getViewport();
1002   if (!viewport)
1003     return false;
1004
1005   // good old scenery center
1006   SGVec3d center = globals->get_scenery()->get_center();
1007
1008   // don't know why, but the update has partly happened somehow,
1009   // so update the scenery part of the viewer
1010   FGViewer *current_view = globals->get_current_view();
1011   // Force update of center dependent values ...
1012   current_view->set_dirty();
1013   SGVec3d position = current_view->getViewPosition();
1014   SGQuatd attitude = current_view->getViewOrientation();
1015   SGVec3d osgPosition = attitude.transform(center - position);
1016   mCameraView->setPosition(osgPosition.osg());
1017   mCameraView->setAttitude(inverse(attitude).osg());
1018
1019   osg::Matrix projection(sceneView->getProjectionMatrix());
1020   osg::Matrix modelview(sceneView->getViewMatrix());
1021
1022   osg::NodePathList nodePath = sceneData->getParentalNodePaths();
1023   // modify the view matrix so that it accounts for this nodePath's
1024   // accumulated transform
1025   if (!nodePath.empty())
1026     modelview.preMult(computeLocalToWorld(nodePath.front()));
1027
1028   // swap the y values ...
1029   y = viewport->height() - y;
1030   // set up the pick visitor
1031   osgUtil::PickVisitor pickVisitor(viewport, projection, modelview, x, y);
1032   sceneData->accept(pickVisitor);
1033   if (!pickVisitor.hits())
1034     return false;
1035
1036   // collect all interaction callbacks on the pick ray.
1037   // They get stored in the pickCallbacks list where they are sorted back
1038   // to front and croasest to finest wrt the scenery node they are attached to
1039   osgUtil::PickVisitor::LineSegmentHitListMap::const_iterator mi;
1040   for (mi = pickVisitor.getSegHitList().begin();
1041        mi != pickVisitor.getSegHitList().end();
1042        ++mi) {
1043     osgUtil::IntersectVisitor::HitList::const_iterator hi;
1044     for (hi = mi->second.begin(); hi != mi->second.end(); ++hi) {
1045       // ok, go back the nodes and ask for intersection callbacks,
1046       // execute them in top down order
1047       const osg::NodePath& np = hi->getNodePath();
1048       osg::NodePath::const_reverse_iterator npi;
1049       for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1050         SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1051         if (!ud)
1052           continue;
1053         for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1054           SGPickCallback* pickCallback = ud->getPickCallback(i);
1055           if (!pickCallback)
1056             continue;
1057           SGSceneryPick sceneryPick;
1058           /// note that this is done totally in doubles instead of
1059           /// just using getWorldIntersectionPoint
1060           osg::Vec3d localPt = hi->getLocalIntersectPoint();
1061           sceneryPick.info.local = SGVec3d(localPt);
1062           if (hi->getMatrix())
1063             sceneryPick.info.wgs84 = SGVec3d(localPt*(*hi->getMatrix()));
1064           else
1065             sceneryPick.info.wgs84 = SGVec3d(localPt);
1066           sceneryPick.info.wgs84 += globals->get_scenery()->get_center();
1067           sceneryPick.callback = pickCallback;
1068           pickList.push_back(sceneryPick);
1069         }
1070       }
1071     }
1072   }
1073
1074   return !pickList.empty();
1075 }
1076
1077 // end of renderer.cxx
1078