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 #ifdef HAVE_CONFIG_H
  23 #  include <config.h>
  24 #endif
  25
  26 #ifdef HAVE_WINDOWS_H
  27 #  include <windows.h>
  28 #endif
  29
  30 #include <simgear/compiler.h>
  31
  32 #include <osg/ref_ptr>
  33 #include <osg/AlphaFunc>
  34 #include <osg/BlendFunc>
  35 #include <osg/Camera>
  36 #include <osg/CullFace>
  37 #include <osg/Depth>
  38 #include <osg/Fog>
  39 #include <osg/Group>
  40 #include <osg/Hint>
  41 #include <osg/Light>
  42 #include <osg/LightModel>
  43 #include <osg/LightSource>
  44 #include <osg/Material>
  45 #include <osg/Math>
  46 #include <osg/NodeCallback>
  47 #include <osg/Notify>
  48 #include <osg/PolygonMode>
  49 #include <osg/PolygonOffset>
  50 #include <osg/Version>
  51 #include <osg/TexEnv>
  52
  53 #include <osgUtil/LineSegmentIntersector>
  54
  55 #include <osg/io_utils>
  56 #include <osgDB/WriteFile>
  57
  58 #include <simgear/math/SGMath.hxx>
  59 #include <simgear/screen/extensions.hxx>
  60 #include <simgear/scene/material/matlib.hxx>
  61 #include <simgear/scene/model/animation.hxx>
  62 #include <simgear/scene/model/placement.hxx>
  63 #include <simgear/scene/sky/sky.hxx>
  64 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  65 #include <simgear/scene/util/RenderConstants.hxx>
  66 #include <simgear/scene/util/SGSceneUserData.hxx>
  67 #include <simgear/scene/tgdb/GroundLightManager.hxx>
  68 #include <simgear/scene/tgdb/pt_lights.hxx>
  69 #include <simgear/props/props.hxx>
  70 #include <simgear/timing/sg_time.hxx>
  71 #include <simgear/ephemeris/ephemeris.hxx>
  72 #include <simgear/math/sg_random.h>
  73 #ifdef FG_JPEG_SERVER
  74 #include <simgear/screen/jpgfactory.hxx>
  75 #endif
  76
  77 #include <simgear/environment/visual_enviro.hxx>
  78
  79 #include <Time/light.hxx>
  80 #include <Time/light.hxx>
  81 #include <Aircraft/aircraft.hxx>
  82 #include <Cockpit/panel.hxx>
  83 #include <Cockpit/cockpit.hxx>
  84 #include <Cockpit/hud.hxx>
  85 #include <Model/panelnode.hxx>
  86 #include <Model/modelmgr.hxx>
  87 #include <Model/acmodel.hxx>
  88 #include <Scenery/scenery.hxx>
  89 #include <Scenery/redout.hxx>
  90 #include <Scenery/tilemgr.hxx>
  91 #include <GUI/new_gui.hxx>
  92 #include <Instrumentation/instrument_mgr.hxx>
  93 #include <Instrumentation/HUD/HUD.hxx>
  94 #include <Environment/precipitation_mgr.hxx>
  95
  96 #include <Include/general.hxx>
  97 #include "splash.hxx"
  98 #include "renderer.hxx"
  99 #include "main.hxx"
 100 #include "CameraGroup.hxx"
 101 #include "FGEventHandler.hxx"
 102
 103 using namespace osg;
 104 using namespace simgear;
 105 using namespace flightgear;
 106
 107 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 108 public:
 109   FGHintUpdateCallback(const char* configNode) :
 110     mConfigNode(fgGetNode(configNode, true))
 111   { }
 112   virtual void operator()(osg::StateAttribute* stateAttribute,
 113                           osg::NodeVisitor*)
 114   {
 115     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 116     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 117
 118     const char* value = mConfigNode->getStringValue();
 119     if (!value)
 120       hint->setMode(GL_DONT_CARE);
 121     else if (0 == strcmp(value, "nicest"))
 122       hint->setMode(GL_NICEST);
 123     else if (0 == strcmp(value, "fastest"))
 124       hint->setMode(GL_FASTEST);
 125     else
 126       hint->setMode(GL_DONT_CARE);
 127   }
 128 private:
 129   SGSharedPtr<SGPropertyNode> mConfigNode;
 130 };
 131
 132
 133 class SGPuDrawable : public osg::Drawable {
 134 public:
 135   SGPuDrawable()
 136   {
 137     // Dynamic stuff, do not store geometry
 138     setUseDisplayList(false);
 139
 140     osg::StateSet* stateSet = getOrCreateStateSet();
 141     stateSet->setRenderBinDetails(1001, "RenderBin");
 142     // speed optimization?
 143     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 144     // We can do translucent menus, so why not. :-)
 145     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 146     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 147     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 148
 149     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 150
 151     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 152     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 153   }
 154   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 155   { drawImplementation(*renderInfo.getState()); }
 156   void drawImplementation(osg::State& state) const
 157   {
 158     state.setActiveTextureUnit(0);
 159     state.setClientActiveTextureUnit(0);
 160
 161     state.disableAllVertexArrays();
 162
 163     glPushAttrib(GL_ALL_ATTRIB_BITS);
 164     glPushClientAttrib(~0u);
 165
 166     puDisplay();
 167
 168     glPopClientAttrib();
 169     glPopAttrib();
 170   }
 171
 172   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 173   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 174
 175 private:
 176 };
 177
 178 class SGHUDAndPanelDrawable : public osg::Drawable {
 179 public:
 180   SGHUDAndPanelDrawable()
 181   {
 182     // Dynamic stuff, do not store geometry
 183     setUseDisplayList(false);
 184
 185     osg::StateSet* stateSet = getOrCreateStateSet();
 186     stateSet->setRenderBinDetails(1000, "RenderBin");
 187
 188     // speed optimization?
 189     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 190     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 191     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 192     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 193     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 194
 195     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 196   }
 197   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 198   { drawImplementation(*renderInfo.getState()); }
 199   void drawImplementation(osg::State& state) const
 200   {
 201     state.setActiveTextureUnit(0);
 202     state.setClientActiveTextureUnit(0);
 203     state.disableAllVertexArrays();
 204
 205     glPushAttrib(GL_ALL_ATTRIB_BITS);
 206     glPushClientAttrib(~0u);
 207
 208     fgCockpitUpdate(&state);
 209
 210     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 211     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 212     hud->draw(state);
 213
 214     // update the panel subsystem
 215     if ( globals->get_current_panel() != NULL )
 216         globals->get_current_panel()->update(state);
 217     // We don't need a state here - can be safely removed when we can pick
 218     // correctly
 219     fgUpdate3DPanels();
 220
 221     glPopClientAttrib();
 222     glPopAttrib();
 223
 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 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 330 public:
 331   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 332   {
 333     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 334     assert(dynamic_cast<osg::Fog*>(sa));
 335     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 336     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 337     fog->setMode(osg::Fog::EXP2);
 338     fog->setColor(updateVisitor->getFogColor().osg());
 339     fog->setDensity(updateVisitor->getFogExp2Density());
 340   }
 341 };
 342
 343 // update callback for the switch node guarding that splash
 344 class FGScenerySwitchCallback : public osg::NodeCallback {
 345 public:
 346   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 347   {
 348     assert(dynamic_cast<osg::Switch*>(node));
 349     osg::Switch* sw = static_cast<osg::Switch*>(node);
 350
 351     double t = globals->get_sim_time_sec();
 352     bool enabled = 0 < t;
 353     sw->setValue(0, enabled);
 354     if (!enabled)
 355       return;
 356     traverse(node, nv);
 357   }
 358 };
 359
 360 // Sky structures
 361 SGSky *thesky;
 362
 363 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 364 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 365
 366 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 367
 368 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 369
 370 FGRenderer::FGRenderer()
 371 {
 372 #ifdef FG_JPEG_SERVER
 373    jpgRenderFrame = FGRenderer::update;
 374 #endif
 375    eventHandler = new FGEventHandler;
 376 }
 377
 378 FGRenderer::~FGRenderer()
 379 {
 380 #ifdef FG_JPEG_SERVER
 381    jpgRenderFrame = NULL;
 382 #endif
 383 }
 384
 385 // Initialize various GL/view parameters
 386 // XXX This should be called "preinit" or something, as it initializes
 387 // critical parts of the scene graph in addition to the splash screen.
 388 void
 389 FGRenderer::splashinit( void ) {
 390     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 391     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 392     mRealRoot->addChild(fgCreateSplashNode());
 393     mFrameStamp = viewer->getFrameStamp();
 394     // Scene doesn't seem to pass the frame stamp to the update
 395     // visitor automatically.
 396     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 397     viewer->setUpdateVisitor(mUpdateVisitor.get());
 398 }
 399
 400 void
 401 FGRenderer::init( void )
 402 {
 403     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 404     osg::initNotifyLevel();
 405
 406     // The number of polygon-offset "units" to place between layers.  In
 407     // principle, one is supposed to be enough.  In practice, I find that
 408     // my hardware/driver requires many more.
 409     osg::PolygonOffset::setUnitsMultiplier(1);
 410     osg::PolygonOffset::setFactorMultiplier(1);
 411
 412     // Go full screen if requested ...
 413     if ( fgGetBool("/sim/startup/fullscreen") )
 414         fgOSFullScreen();
 415
 416     viewer->getCamera()
 417         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 418
 419     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 420
 421     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 422
 423     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 424     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 425
 426     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 427     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 428     stateSet->setAttribute(new osg::BlendFunc);
 429     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 430
 431     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 432
 433     // this will be set below
 434     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 435
 436     osg::Material* material = new osg::Material;
 437     stateSet->setAttribute(material);
 438
 439     stateSet->setTextureAttribute(0, new osg::TexEnv);
 440     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 441
 442     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 443     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 444     stateSet->setAttribute(hint);
 445     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 446     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 447     stateSet->setAttribute(hint);
 448     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 449     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 450     stateSet->setAttribute(hint);
 451     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 452     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 453     stateSet->setAttribute(hint);
 454     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 455     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 456     stateSet->setAttribute(hint);
 457
 458     osg::Group* sceneGroup = new osg::Group;
 459     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 460     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 461
 462     //sceneGroup->addChild(thesky->getCloudRoot());
 463
 464     stateSet = sceneGroup->getOrCreateStateSet();
 465     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 466
 467     // need to update the light on every frame
 468     osg::LightSource* lightSource = new osg::LightSource;
 469     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 470     // relative because of CameraView being just a clever transform node
 471     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 472     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 473
 474     lightSource->addChild(sceneGroup);
 475     lightSource->addChild(thesky->getPreRoot());
 476     mRoot->addChild(lightSource);
 477
 478     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 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     osg::Fog* fog = new osg::Fog;
 496     fog->setUpdateCallback(new FGFogUpdateCallback);
 497     stateSet->setAttributeAndModes(fog);
 498     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 499
 500     // plug in the GUI
 501     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
 502     if (guiCamera) {
 503         osg::Geode* geode = new osg::Geode;
 504         geode->addDrawable(new SGPuDrawable);
 505         geode->addDrawable(new SGHUDAndPanelDrawable);
 506         guiCamera->addChild(geode);
 507     }
 508     osg::Switch* sw = new osg::Switch;
 509     sw->setUpdateCallback(new FGScenerySwitchCallback);
 510     sw->addChild(mRoot.get());
 511     mRealRoot->addChild(sw);
 512     mRealRoot->addChild(thesky->getCloudRoot());
 513     mRealRoot->addChild(FGCreateRedoutNode());
 514 }
 515
 516
 517 // Update all Visuals (redraws anything graphics related)
 518 void
 519 FGRenderer::update( bool refresh_camera_settings ) {
 520     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 521                           || fgGetBool("sim/sceneryloaded-override");
 522     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 523     if ( idle_state < 1000 || !scenery_loaded ) {
 524         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 525
 526         // Keep resetting sim time while the sim is initializing
 527         // the splash screen is now in the scenegraph
 528         globals->set_sim_time_sec( 0.0 );
 529         return;
 530     }
 531
 532     // Fade out the splash screen over the first three seconds.
 533     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 534     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 535
 536     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 537     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 538     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 539     bool distance_attenuation
 540         = fgGetBool("/sim/rendering/distance-attenuation");
 541     // OSGFIXME
 542     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 543                                   distance_attenuation );
 544
 545     static const SGPropertyNode *groundlevel_nearplane
 546         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 547
 548     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 549
 550     // update fog params
 551     double actual_visibility;
 552     if (fgGetBool("/environment/clouds/status")) {
 553         actual_visibility = thesky->get_visibility();
 554     } else {
 555         actual_visibility = fgGetDouble("/environment/visibility-m");
 556     }
 557
 558     // idle_state is now 1000 meaning we've finished all our
 559     // initializations and are running the main loop, so this will
 560     // now work without seg faulting the system.
 561
 562     FGViewer *current__view = globals->get_current_view();
 563     // Force update of center dependent values ...
 564     current__view->set_dirty();
 565
 566     if ( refresh_camera_settings ) {
 567         // update view port
 568         resize( fgGetInt("/sim/startup/xsize"),
 569                 fgGetInt("/sim/startup/ysize") );
 570     }
 571     osg::Camera *camera = viewer->getCamera();
 572
 573     if ( skyblend ) {
 574
 575         if ( fgGetBool("/sim/rendering/textures") ) {
 576             SGVec4f clearColor(l->adj_fog_color());
 577             camera->setClearColor(clearColor.osg());
 578         }
 579     } else {
 580         SGVec4f clearColor(l->sky_color());
 581         camera->setClearColor(clearColor.osg());
 582     }
 583
 584     // update fog params if visibility has changed
 585     double visibility_meters = fgGetDouble("/environment/visibility-m");
 586     thesky->set_visibility(visibility_meters);
 587
 588     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 589                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 590                         / (double)fgGetInt("/sim/model-hz") );
 591
 592     // update the sky dome
 593     if ( skyblend ) {
 594
 595         // The sun and moon distances are scaled down versions
 596         // of the actual distance to get both the moon and the sun
 597         // within the range of the far clip plane.
 598         // Moon distance:    384,467 kilometers
 599         // Sun distance: 150,000,000 kilometers
 600
 601         double sun_horiz_eff, moon_horiz_eff;
 602         if (fgGetBool("/sim/rendering/horizon-effect")) {
 603             sun_horiz_eff
 604                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
 605                                              0.0),
 606                              0.33) / 3.0;
 607             moon_horiz_eff
 608                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
 609                                              0.0),
 610                              0.33)/3.0;
 611         } else {
 612            sun_horiz_eff = moon_horiz_eff = 1.0;
 613         }
 614
 615         SGSkyState sstate;
 616
 617         SGVec3d viewPos = current__view->getViewPosition();
 618         sstate.view_pos  = toVec3f(viewPos);
 619         SGGeod geodViewPos = SGGeod::fromCart(viewPos);
 620         SGGeod geodZeroViewPos = SGGeod::fromGeodM(geodViewPos, 0);
 621         sstate.zero_elev = toVec3f(SGVec3d::fromGeod(geodZeroViewPos));
 622         SGQuatd hlOr = SGQuatd::fromLonLat(geodViewPos);
 623         sstate.view_up   = toVec3f(hlOr.backTransform(-SGVec3d::e3()));
 624         sstate.lon       = geodViewPos.getLongitudeRad();
 625         sstate.lat       = geodViewPos.getLatitudeRad();
 626         sstate.alt       = geodViewPos.getElevationM();
 627         sstate.spin      = l->get_sun_rotation();
 628         sstate.gst       = globals->get_time_params()->getGst();
 629         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 630         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 631         sstate.sun_angle = l->get_sun_angle();
 632
 633
 634         /*
 635          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 636          << l->sky_color()[0] << " "
 637          << l->sky_color()[1] << " "
 638          << l->sky_color()[2] << " "
 639          << l->sky_color()[3] );
 640         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 641          << l->fog_color()[0] << " "
 642          << l->fog_color()[1] << " "
 643          << l->fog_color()[2] << " "
 644          << l->fog_color()[3] );
 645         SG_LOG( SG_GENERAL, SG_BULK,
 646                 "    sun_angle = " << l->sun_angle
 647          << "    moon_angle = " << l->moon_angle );
 648         */
 649
 650         SGSkyColor scolor;
 651
 652         scolor.sky_color   = SGVec3f(l->sky_color().data());
 653         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
 654         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 655         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 656         scolor.sun_angle   = l->get_sun_angle();
 657         scolor.moon_angle  = l->get_moon_angle();
 658
 659         thesky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
 660         thesky->repaint( scolor, *globals->get_ephem() );
 661
 662         /*
 663         SG_LOG( SG_GENERAL, SG_BULK,
 664                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 665          << view_pos[1] << " " << view_pos[2] );
 666         SG_LOG( SG_GENERAL, SG_BULK,
 667                 "    zero_elev = " << zero_elev[0] << " "
 668          << zero_elev[1] << " " << zero_elev[2]
 669          << " lon = " << cur_fdm_state->get_Longitude()
 670          << " lat = " << cur_fdm_state->get_Latitude() );
 671         SG_LOG( SG_GENERAL, SG_BULK,
 672                 "    sun_rot = " << l->get_sun_rotation
 673          << " gst = " << SGTime::cur_time_params->getGst() );
 674         SG_LOG( SG_GENERAL, SG_BULK,
 675              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 676           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 677           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 678           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 679         */
 680
 681         //OSGFIXME
 682 //         shadows->setupShadows(
 683 //           current__view->getLongitude_deg(),
 684 //           current__view->getLatitude_deg(),
 685 //           globals->get_time_params()->getGst(),
 686 //           globals->get_ephem()->getSunRightAscension(),
 687 //           globals->get_ephem()->getSunDeclination(),
 688 //           l->get_sun_angle());
 689
 690     }
 691
 692 //     sgEnviro.setLight(l->adj_fog_color());
 693 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 694 //         current__view->get_world_up(),
 695 //         current__view->getLongitude_deg(),
 696 //         current__view->getLatitude_deg(),
 697 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 698 //         delta_time_sec);
 699
 700     // OSGFIXME
 701 //     sgEnviro.drawLightning();
 702
 703 //        double current_view_origin_airspeed_horiz_kt =
 704 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 705 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 706 //                                * SGD_DEGREES_TO_RADIANS);
 707
 708     // OSGFIXME
 709 //     if( is_internal )
 710 //         shadows->endOfFrame();
 711
 712     // need to call the update visitor once
 713     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 714     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 715                                 current__view->getViewOrientation());
 716     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 717     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 718                              l->scene_diffuse(), l->scene_specular(),
 719                              l->adj_fog_color(),
 720                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 721     mUpdateVisitor->setVisibility(actual_visibility);
 722     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 723     bool hotspots = fgGetBool("/sim/panel-hotspots");
 724     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 725     cullMask |= simgear::GroundLightManager::instance()
 726         ->getLightNodeMask(mUpdateVisitor.get());
 727     if (hotspots)
 728         cullMask |= simgear::PICK_BIT;
 729     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
 730 }
 731
 732
 733
 734 // options.cxx needs to see this for toggle_panel()
 735 // Handle new window size or exposure
 736 void
 737 FGRenderer::resize( int width, int height ) {
 738     int view_h;
 739
 740     if ( (!fgGetBool("/sim/virtual-cockpit"))
 741          && fgPanelVisible() && idle_state == 1000 ) {
 742         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 743                              globals->get_current_panel()->getYOffset()) / 768.0);
 744     } else {
 745         view_h = height;
 746     }
 747
 748     static int lastwidth = 0;
 749     static int lastheight = 0;
 750     if (width != lastwidth)
 751         fgSetInt("/sim/startup/xsize", lastwidth = width);
 752     if (height != lastheight)
 753         fgSetInt("/sim/startup/ysize", lastheight = height);
 754
 755     // for all views
 756     FGViewMgr *viewmgr = globals->get_viewmgr();
 757     if (viewmgr) {
 758       for ( int i = 0; i < viewmgr->size(); ++i ) {
 759         viewmgr->get_view(i)->
 760           set_aspect_ratio((float)view_h / (float)width);
 761       }
 762     }
 763 }
 764
 765 bool
 766 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 767                  const osgGA::GUIEventAdapter* ea)
 768 {
 769     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 770     // wipe out the return ...
 771     pickList.clear();
 772     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 773     Intersections intersections;
 774
 775     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 776         return false;
 777     for (Intersections::iterator hit = intersections.begin(),
 778              e = intersections.end();
 779          hit != e;
 780          ++hit) {
 781         const osg::NodePath& np = hit->nodePath;
 782         osg::NodePath::const_reverse_iterator npi;
 783         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 784             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 785             if (!ud)
 786                 continue;
 787             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 788                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 789                 if (!pickCallback)
 790                     continue;
 791                 SGSceneryPick sceneryPick;
 792                 sceneryPick.info.local = SGVec3d(hit->getLocalIntersectPoint());
 793                 sceneryPick.info.wgs84 = SGVec3d(hit->getWorldIntersectPoint());
 794                 sceneryPick.callback = pickCallback;
 795                 pickList.push_back(sceneryPick);
 796             }
 797         }
 798     }
 799     return !pickList.empty();
 800 }
 801
 802 void
 803 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
 804 {
 805     viewer = viewer_;
 806 }
 807
 808 void
 809 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
 810 {
 811     eventHandler = eventHandler_;
 812 }
 813
 814 void
 815 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 816 {
 817     mRealRoot->addChild(camera);
 818 }
 819
 820 bool
 821 fgDumpSceneGraphToFile(const char* filename)
 822 {
 823     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 824 }
 825
 826 bool
 827 fgDumpTerrainBranchToFile(const char* filename)
 828 {
 829     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 830                                  filename );
 831 }
 832
 833 // For debugging
 834 bool
 835 fgDumpNodeToFile(osg::Node* node, const char* filename)
 836 {
 837     return osgDB::writeNodeFile(*node, filename);
 838 }
 839 // end of renderer.cxx
 840