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 #include <simgear/compiler.h>
  27
  28 #include <osg/ref_ptr>
  29 #include <osg/AlphaFunc>
  30 #include <osg/BlendFunc>
  31 #include <osg/Camera>
  32 #include <osg/CullFace>
  33 #include <osg/Depth>
  34 #include <osg/Fog>
  35 #include <osg/Group>
  36 #include <osg/Hint>
  37 #include <osg/Light>
  38 #include <osg/LightModel>
  39 #include <osg/LightSource>
  40 #include <osg/Material>
  41 #include <osg/NodeCallback>
  42 #include <osg/Notify>
  43 #include <osg/PolygonMode>
  44 #include <osg/PolygonOffset>
  45 #include <osg/ShadeModel>
  46 #include <osg/Version>
  47 #include <osg/TexEnv>
  48
  49 #include <osgUtil/SceneView>
  50 #include <osgUtil/UpdateVisitor>
  51 #include <osgUtil/IntersectVisitor>
  52 #include <osgUtil/LineSegmentIntersector>
  53
  54 #include <osg/io_utils>
  55 #include <osgDB/WriteFile>
  56 #include <osgDB/ReadFile>
  57 #include <sstream>
  58
  59 #include <simgear/math/SGMath.hxx>
  60 #include <simgear/screen/extensions.hxx>
  61 #include <simgear/scene/material/matlib.hxx>
  62 #include <simgear/scene/model/animation.hxx>
  63 #include <simgear/scene/model/placement.hxx>
  64 #include <simgear/scene/sky/sky.hxx>
  65 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  66 #include <simgear/scene/util/RenderConstants.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 "ViewPartitionNode.hxx"
 102
 103 // XXX Make this go away when OSG 2.2 is released.
 104 #if (FG_OSG_VERSION >= 21004)
 105 #define UPDATE_VISITOR_IN_VIEWER 1
 106 #endif
 107
 108 using namespace flightgear;
 109
 110 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 111 public:
 112   FGHintUpdateCallback(const char* configNode) :
 113     mConfigNode(fgGetNode(configNode, true))
 114   { }
 115   virtual void operator()(osg::StateAttribute* stateAttribute,
 116                           osg::NodeVisitor*)
 117   {
 118     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 119     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 120
 121     const char* value = mConfigNode->getStringValue();
 122     if (!value)
 123       hint->setMode(GL_DONT_CARE);
 124     else if (0 == strcmp(value, "nicest"))
 125       hint->setMode(GL_NICEST);
 126     else if (0 == strcmp(value, "fastest"))
 127       hint->setMode(GL_FASTEST);
 128     else
 129       hint->setMode(GL_DONT_CARE);
 130   }
 131 private:
 132   SGSharedPtr<SGPropertyNode> mConfigNode;
 133 };
 134
 135
 136 class SGPuDrawable : public osg::Drawable {
 137 public:
 138   SGPuDrawable()
 139   {
 140     // Dynamic stuff, do not store geometry
 141     setUseDisplayList(false);
 142
 143     osg::StateSet* stateSet = getOrCreateStateSet();
 144     stateSet->setRenderBinDetails(1001, "RenderBin");
 145     // speed optimization?
 146     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 147     // We can do translucent menus, so why not. :-)
 148     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 149     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 150     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 151
 152     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 153
 154     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 155     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 156   }
 157   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 158   { drawImplementation(*renderInfo.getState()); }
 159   void drawImplementation(osg::State& state) const
 160   {
 161     state.setActiveTextureUnit(0);
 162     state.setClientActiveTextureUnit(0);
 163
 164     state.disableAllVertexArrays();
 165
 166     glPushAttrib(GL_ALL_ATTRIB_BITS);
 167     glPushClientAttrib(~0u);
 168
 169     puDisplay();
 170
 171     glPopClientAttrib();
 172     glPopAttrib();
 173   }
 174
 175   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 176   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 177
 178 private:
 179 };
 180
 181 class SGHUDAndPanelDrawable : public osg::Drawable {
 182 public:
 183   SGHUDAndPanelDrawable()
 184   {
 185     // Dynamic stuff, do not store geometry
 186     setUseDisplayList(false);
 187
 188     osg::StateSet* stateSet = getOrCreateStateSet();
 189     stateSet->setRenderBinDetails(1000, "RenderBin");
 190
 191     // speed optimization?
 192     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 193     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 194     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 195     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 196     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 197
 198     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 199   }
 200   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 201   { drawImplementation(*renderInfo.getState()); }
 202   void drawImplementation(osg::State& state) const
 203   {
 204     state.setActiveTextureUnit(0);
 205     state.setClientActiveTextureUnit(0);
 206     state.disableAllVertexArrays();
 207
 208     glPushAttrib(GL_ALL_ATTRIB_BITS);
 209     glPushClientAttrib(~0u);
 210
 211     fgCockpitUpdate(&state);
 212
 213     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 214     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 215     hud->draw(state);
 216
 217     // update the panel subsystem
 218     if ( globals->get_current_panel() != NULL )
 219         globals->get_current_panel()->update(state);
 220     // We don't need a state here - can be safely removed when we can pick
 221     // correctly
 222     fgUpdate3DPanels();
 223
 224     glPopClientAttrib();
 225     glPopAttrib();
 226
 227   }
 228
 229   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 230   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 231
 232 private:
 233 };
 234
 235 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 236 public:
 237   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 238   {
 239     assert(dynamic_cast<osg::LightSource*>(node));
 240     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 241     osg::Light* light = lightSource->getLight();
 242
 243     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 244     light->setAmbient(l->scene_ambient().osg());
 245     light->setDiffuse(l->scene_diffuse().osg());
 246     light->setSpecular(l->scene_specular().osg());
 247     SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 248     light->setPosition(position.osg());
 249     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 250     light->setDirection(direction.osg());
 251     light->setSpotExponent(0);
 252     light->setSpotCutoff(180);
 253     light->setConstantAttenuation(1);
 254     light->setLinearAttenuation(0);
 255     light->setQuadraticAttenuation(0);
 256
 257     traverse(node, nv);
 258   }
 259 };
 260
 261 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 262 public:
 263   FGWireFrameModeUpdateCallback() :
 264     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 265   { }
 266   virtual void operator()(osg::StateAttribute* stateAttribute,
 267                           osg::NodeVisitor*)
 268   {
 269     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 270     osg::PolygonMode* polygonMode;
 271     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 272
 273     if (mWireframe->getBoolValue())
 274       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 275                            osg::PolygonMode::LINE);
 276     else
 277       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 278                            osg::PolygonMode::FILL);
 279   }
 280 private:
 281   SGSharedPtr<SGPropertyNode> mWireframe;
 282 };
 283
 284 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 285 public:
 286   FGLightModelUpdateCallback() :
 287     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 288   { }
 289   virtual void operator()(osg::StateAttribute* stateAttribute,
 290                           osg::NodeVisitor*)
 291   {
 292     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 293     osg::LightModel* lightModel;
 294     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 295
 296 #if 0
 297     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 298     lightModel->setAmbientIntensity(l->scene_ambient().osg());
 299 #else
 300     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 301 #endif
 302     lightModel->setTwoSided(true);
 303     lightModel->setLocalViewer(false);
 304
 305     if (mHighlights->getBoolValue()) {
 306       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 307     } else {
 308       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 309     }
 310   }
 311 private:
 312   SGSharedPtr<SGPropertyNode> mHighlights;
 313 };
 314
 315 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 316 public:
 317   FGFogEnableUpdateCallback() :
 318     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 319   { }
 320   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 321   {
 322     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 323       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 324     } else {
 325       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 326     }
 327   }
 328 private:
 329   SGSharedPtr<SGPropertyNode> mFogEnabled;
 330 };
 331
 332 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 333 public:
 334   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 335   {
 336     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 337     assert(dynamic_cast<osg::Fog*>(sa));
 338     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 339     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 340     fog->setMode(osg::Fog::EXP2);
 341     fog->setColor(updateVisitor->getFogColor().osg());
 342     fog->setDensity(updateVisitor->getFogExp2Density());
 343   }
 344 };
 345
 346 // update callback for the switch node guarding that splash
 347 class FGScenerySwitchCallback : public osg::NodeCallback {
 348 public:
 349   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 350   {
 351     assert(dynamic_cast<osg::Switch*>(node));
 352     osg::Switch* sw = static_cast<osg::Switch*>(node);
 353
 354     double t = globals->get_sim_time_sec();
 355     bool enabled = 0 < t;
 356     sw->setValue(0, enabled);
 357     if (!enabled)
 358       return;
 359     traverse(node, nv);
 360   }
 361 };
 362
 363 // Sky structures
 364 SGSky *thesky;
 365
 366 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 367 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 368
 369 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 370
 371 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 372
 373 static osg::ref_ptr<ViewPartitionNode> viewPartition = new ViewPartitionNode;
 374
 375 FGRenderer::FGRenderer()
 376 {
 377 #ifdef FG_JPEG_SERVER
 378    jpgRenderFrame = FGRenderer::update;
 379 #endif
 380    manipulator = new FGManipulator;
 381 }
 382
 383 FGRenderer::~FGRenderer()
 384 {
 385 #ifdef FG_JPEG_SERVER
 386    jpgRenderFrame = NULL;
 387 #endif
 388 }
 389
 390 // Initialize various GL/view parameters
 391 // XXX This should be called "preinit" or something, as it initializes
 392 // critical parts of the scene graph in addition to the splash screen.
 393 void
 394 FGRenderer::splashinit( void ) {
 395     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 396     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 397     mRealRoot->addChild(fgCreateSplashNode());
 398     mFrameStamp = viewer->getFrameStamp();
 399     // Scene doesn't seem to pass the frame stamp to the update
 400     // visitor automatically.
 401     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 402 #ifdef UPDATE_VISITOR_IN_VIEWER
 403     viewer->setUpdateVisitor(mUpdateVisitor.get());
 404 #else
 405     osgViewer::Scene* scene = viewer->getScene();
 406     scene->setUpdateVisitor(mUpdateVisitor.get());
 407 #endif
 408 }
 409
 410 void
 411 FGRenderer::init( void )
 412 {
 413     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 414     osg::initNotifyLevel();
 415
 416     // The number of polygon-offset "units" to place between layers.  In
 417     // principle, one is supposed to be enough.  In practice, I find that
 418     // my hardware/driver requires many more.
 419     osg::PolygonOffset::setUnitsMultiplier(1);
 420     osg::PolygonOffset::setFactorMultiplier(1);
 421
 422     // Go full screen if requested ...
 423     if ( fgGetBool("/sim/startup/fullscreen") )
 424         fgOSFullScreen();
 425
 426     viewer->getCamera()
 427         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 428
 429     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 430
 431     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 432
 433     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 434     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 435
 436     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 437     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 438     stateSet->setAttribute(new osg::BlendFunc);
 439     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 440
 441     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 442
 443     // this will be set below
 444     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 445
 446     osg::Material* material = new osg::Material;
 447     stateSet->setAttribute(material);
 448
 449     stateSet->setTextureAttribute(0, new osg::TexEnv);
 450     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 451
 452     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 453     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 454     stateSet->setAttribute(hint);
 455     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 456     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 457     stateSet->setAttribute(hint);
 458     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 459     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 460     stateSet->setAttribute(hint);
 461     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 462     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 463     stateSet->setAttribute(hint);
 464     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 465     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 466     stateSet->setAttribute(hint);
 467
 468     osg::Group* sceneGroup = new osg::Group;
 469     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 470     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 471
 472     //sceneGroup->addChild(thesky->getCloudRoot());
 473
 474     stateSet = sceneGroup->getOrCreateStateSet();
 475     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 476     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 477
 478     // need to update the light on every frame
 479     osg::LightSource* lightSource = new osg::LightSource;
 480     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 481     // relative because of CameraView being just a clever transform node
 482     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 483     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 484
 485     lightSource->addChild(sceneGroup);
 486     lightSource->addChild(thesky->getPreRoot());
 487     mRoot->addChild(lightSource);
 488
 489     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 490     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 491     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 492     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 493     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 494
 495     // enable disable specular highlights.
 496     // is the place where we might plug in an other fragment shader ...
 497     osg::LightModel* lightModel = new osg::LightModel;
 498     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 499     stateSet->setAttribute(lightModel);
 500
 501     // switch to enable wireframe
 502     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 503     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 504     stateSet->setAttributeAndModes(polygonMode);
 505
 506     // scene fog handling
 507     osg::Fog* fog = new osg::Fog;
 508     fog->setUpdateCallback(new FGFogUpdateCallback);
 509     stateSet->setAttributeAndModes(fog);
 510     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 511
 512     // plug in the GUI
 513     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
 514     if (guiCamera) {
 515         osg::Geode* geode = new osg::Geode;
 516         geode->addDrawable(new SGPuDrawable);
 517         geode->addDrawable(new SGHUDAndPanelDrawable);
 518         guiCamera->addChild(geode);
 519     }
 520     osg::Switch* sw = new osg::Switch;
 521     sw->setUpdateCallback(new FGScenerySwitchCallback);
 522     sw->addChild(mRoot.get());
 523     viewPartition->addChild(sw);
 524     viewPartition->addChild(thesky->getCloudRoot());
 525
 526     mRealRoot->addChild(viewPartition.get());
 527     mRealRoot->addChild(FGCreateRedoutNode());
 528 }
 529
 530
 531 // Update all Visuals (redraws anything graphics related)
 532 void
 533 FGRenderer::update( bool refresh_camera_settings ) {
 534     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 535                           || fgGetBool("sim/sceneryloaded-override");
 536     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 537     if ( idle_state < 1000 || !scenery_loaded ) {
 538         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 539
 540         // Keep resetting sim time while the sim is initializing
 541         // the splash screen is now in the scenegraph
 542         globals->set_sim_time_sec( 0.0 );
 543         return;
 544     }
 545
 546     // Fade out the splash screen over the first three seconds.
 547     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 548     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 549
 550     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 551     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 552     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 553     bool distance_attenuation
 554         = fgGetBool("/sim/rendering/distance-attenuation");
 555     // OSGFIXME
 556     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 557                                   distance_attenuation );
 558
 559     static const SGPropertyNode *groundlevel_nearplane
 560         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 561
 562     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 563
 564     // update fog params
 565     double actual_visibility;
 566     if (fgGetBool("/environment/clouds/status")) {
 567         actual_visibility = thesky->get_visibility();
 568     } else {
 569         actual_visibility = fgGetDouble("/environment/visibility-m");
 570     }
 571
 572     // idle_state is now 1000 meaning we've finished all our
 573     // initializations and are running the main loop, so this will
 574     // now work without seg faulting the system.
 575
 576     FGViewer *current__view = globals->get_current_view();
 577     // Force update of center dependent values ...
 578     current__view->set_dirty();
 579
 580     if ( refresh_camera_settings ) {
 581         // update view port
 582         resize( fgGetInt("/sim/startup/xsize"),
 583                 fgGetInt("/sim/startup/ysize") );
 584 #if 0
 585         SGVec3d position = current__view->getViewPosition();
 586         SGQuatd attitude = current__view->getViewOrientation();
 587
 588         FGManipulator *manipulator = globals->get_renderer()->getManipulator();
 589         manipulator->setPosition(position.osg());
 590         manipulator->setAttitude(attitude.osg());
 591 #endif
 592     }
 593     osg::Camera *camera = viewer->getCamera();
 594
 595     if ( skyblend ) {
 596
 597         if ( fgGetBool("/sim/rendering/textures") ) {
 598             SGVec4f clearColor(l->adj_fog_color());
 599             camera->setClearColor(clearColor.osg());
 600         }
 601     } else {
 602         SGVec4f clearColor(l->sky_color());
 603         camera->setClearColor(clearColor.osg());
 604     }
 605
 606     // update fog params if visibility has changed
 607     double visibility_meters = fgGetDouble("/environment/visibility-m");
 608     thesky->set_visibility(visibility_meters);
 609
 610     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 611                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 612                         / (double)fgGetInt("/sim/model-hz") );
 613
 614     // update the sky dome
 615     if ( skyblend ) {
 616
 617         // The sun and moon distances are scaled down versions
 618         // of the actual distance to get both the moon and the sun
 619         // within the range of the far clip plane.
 620         // Moon distance:    384,467 kilometers
 621         // Sun distance: 150,000,000 kilometers
 622
 623         double sun_horiz_eff, moon_horiz_eff;
 624         if (fgGetBool("/sim/rendering/horizon-effect")) {
 625            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 626            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 627         } else {
 628            sun_horiz_eff = moon_horiz_eff = 1.0;
 629         }
 630
 631         static SGSkyState sstate;
 632
 633         sstate.view_pos  = toVec3f(current__view->get_view_pos());
 634         sstate.zero_elev = toVec3f(current__view->get_zero_elev());
 635         sstate.view_up   = current__view->get_world_up();
 636         sstate.lon       = current__view->getLongitude_deg()
 637                             * SGD_DEGREES_TO_RADIANS;
 638         sstate.lat       = current__view->getLatitude_deg()
 639                             * SGD_DEGREES_TO_RADIANS;
 640         sstate.alt       = current__view->getAltitudeASL_ft()
 641                             * SG_FEET_TO_METER;
 642         sstate.spin      = l->get_sun_rotation();
 643         sstate.gst       = globals->get_time_params()->getGst();
 644         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 645         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 646         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 647         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 648         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 649         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 650         sstate.sun_angle = l->get_sun_angle();
 651
 652
 653         /*
 654          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 655          << l->sky_color()[0] << " "
 656          << l->sky_color()[1] << " "
 657          << l->sky_color()[2] << " "
 658          << l->sky_color()[3] );
 659         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 660          << l->fog_color()[0] << " "
 661          << l->fog_color()[1] << " "
 662          << l->fog_color()[2] << " "
 663          << l->fog_color()[3] );
 664         SG_LOG( SG_GENERAL, SG_BULK,
 665                 "    sun_angle = " << l->sun_angle
 666          << "    moon_angle = " << l->moon_angle );
 667         */
 668
 669         static SGSkyColor scolor;
 670
 671         scolor.sky_color   = SGVec3f(l->sky_color().data());
 672         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 673         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 674         scolor.sun_angle   = l->get_sun_angle();
 675         scolor.moon_angle  = l->get_moon_angle();
 676         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 677         scolor.nstars      = globals->get_ephem()->getNumStars();
 678         scolor.planet_data = globals->get_ephem()->getPlanets();
 679         scolor.star_data   = globals->get_ephem()->getStars();
 680
 681         thesky->reposition( sstate, delta_time_sec );
 682         thesky->repaint( scolor );
 683
 684         /*
 685         SG_LOG( SG_GENERAL, SG_BULK,
 686                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 687          << view_pos[1] << " " << view_pos[2] );
 688         SG_LOG( SG_GENERAL, SG_BULK,
 689                 "    zero_elev = " << zero_elev[0] << " "
 690          << zero_elev[1] << " " << zero_elev[2]
 691          << " lon = " << cur_fdm_state->get_Longitude()
 692          << " lat = " << cur_fdm_state->get_Latitude() );
 693         SG_LOG( SG_GENERAL, SG_BULK,
 694                 "    sun_rot = " << l->get_sun_rotation
 695          << " gst = " << SGTime::cur_time_params->getGst() );
 696         SG_LOG( SG_GENERAL, SG_BULK,
 697              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 698           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 699           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 700           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 701         */
 702
 703         //OSGFIXME
 704 //         shadows->setupShadows(
 705 //           current__view->getLongitude_deg(),
 706 //           current__view->getLatitude_deg(),
 707 //           globals->get_time_params()->getGst(),
 708 //           globals->get_ephem()->getSunRightAscension(),
 709 //           globals->get_ephem()->getSunDeclination(),
 710 //           l->get_sun_angle());
 711
 712     }
 713
 714 //     sgEnviro.setLight(l->adj_fog_color());
 715 #if 0
 716     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 717       - current__view->getSGLocation()->get_cur_elev_m();
 718
 719     float scene_nearplane, scene_farplane;
 720     // XXX Given that the own airplane model is part of the scene
 721     // graph, should this business be ripped out? The near plane is
 722     // ignored by setCameraParameters.
 723     if ( agl > 10.0 ) {
 724         scene_nearplane = 10.0f;
 725         scene_farplane = 120000.0f;
 726     } else {
 727         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 728         scene_farplane = 120000.0f;
 729     }
 730     setCameraParameters(current__view->get_v_fov(),
 731                         current__view->get_aspect_ratio(),
 732                         scene_nearplane, scene_farplane);
 733 #endif
 734 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 735 //         current__view->get_world_up(),
 736 //         current__view->getLongitude_deg(),
 737 //         current__view->getLatitude_deg(),
 738 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 739 //         delta_time_sec);
 740
 741     // OSGFIXME
 742 //     sgEnviro.drawLightning();
 743
 744 //        double current_view_origin_airspeed_horiz_kt =
 745 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 746 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 747 //                                * SGD_DEGREES_TO_RADIANS);
 748
 749     // OSGFIXME
 750 //     if( is_internal )
 751 //         shadows->endOfFrame();
 752
 753     // need to call the update visitor once
 754     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 755     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 756                                 current__view->getViewOrientation());
 757     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 758     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 759                              l->scene_diffuse(), l->scene_specular(),
 760                              l->adj_fog_color(),
 761                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 762     mUpdateVisitor->setVisibility(actual_visibility);
 763     viewPartition->setVisibility(actual_visibility);
 764     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 765     bool hotspots = fgGetBool("/sim/panel-hotspots");
 766     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 767     cullMask |= simgear::GroundLightManager::instance()
 768         ->getLightNodeMask(mUpdateVisitor.get());
 769     if (hotspots)
 770         cullMask |= simgear::PICK_BIT;
 771     camera->setCullMask(cullMask);
 772     // XXX
 773     for (int i = 0; i < viewer->getNumSlaves(); ++i)
 774         viewer->getSlave(i)._camera->setCullMask(cullMask);
 775 }
 776
 777
 778
 779 // options.cxx needs to see this for toggle_panel()
 780 // Handle new window size or exposure
 781 void
 782 FGRenderer::resize( int width, int height ) {
 783     int view_h;
 784
 785     if ( (!fgGetBool("/sim/virtual-cockpit"))
 786          && fgPanelVisible() && idle_state == 1000 ) {
 787         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 788                              globals->get_current_panel()->getYOffset()) / 768.0);
 789     } else {
 790         view_h = height;
 791     }
 792
 793     static int lastwidth = 0;
 794     static int lastheight = 0;
 795     if (width != lastwidth)
 796         fgSetInt("/sim/startup/xsize", lastwidth = width);
 797     if (height != lastheight)
 798         fgSetInt("/sim/startup/ysize", lastheight = height);
 799
 800     // for all views
 801     FGViewMgr *viewmgr = globals->get_viewmgr();
 802     if (viewmgr) {
 803       for ( int i = 0; i < viewmgr->size(); ++i ) {
 804         viewmgr->get_view(i)->
 805           set_aspect_ratio((float)view_h / (float)width);
 806       }
 807     }
 808 }
 809
 810 void FGRenderer::setCameraParameters(float vfov, float aspectRatio,
 811                                      float zNear, float zFar)
 812 {
 813     zNear = .1;
 814     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 815     viewer->getCamera()->setProjectionMatrixAsPerspective(vfov,
 816                                                           1.0f / aspectRatio,
 817                                                           zNear, zFar);
 818
 819 }
 820 bool
 821 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 822                  const osgGA::GUIEventAdapter* ea)
 823 {
 824     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 825     // wipe out the return ...
 826     pickList.clear();
 827     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 828     Intersections intersections;
 829
 830     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 831         return false;
 832     for (Intersections::iterator hit = intersections.begin(),
 833              e = intersections.end();
 834          hit != e;
 835          ++hit) {
 836         const osg::NodePath& np = hit->nodePath;
 837         osg::NodePath::const_reverse_iterator npi;
 838         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 839             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 840             if (!ud)
 841                 continue;
 842             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 843                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 844                 if (!pickCallback)
 845                     continue;
 846                 SGSceneryPick sceneryPick;
 847                 sceneryPick.info.local = SGVec3d(hit->getLocalIntersectPoint());
 848                 sceneryPick.info.wgs84 = SGVec3d(hit->getWorldIntersectPoint());
 849                 sceneryPick.callback = pickCallback;
 850                 pickList.push_back(sceneryPick);
 851             }
 852         }
 853     }
 854     return !pickList.empty();
 855 }
 856
 857 void
 858 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 859 {
 860     mRealRoot->addChild(camera);
 861 }
 862
 863 bool
 864 fgDumpSceneGraphToFile(const char* filename)
 865 {
 866     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 867 }
 868
 869 bool
 870 fgDumpTerrainBranchToFile(const char* filename)
 871 {
 872     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 873                                  filename );
 874 }
 875
 876 // For debugging
 877 bool
 878 fgDumpNodeToFile(osg::Node* node, const char* filename)
 879 {
 880     return osgDB::writeNodeFile(*node, filename);
 881 }
 882 // end of renderer.cxx
 883