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 #include <Main/viewer.hxx>
 103
 104 using namespace osg;
 105 using namespace simgear;
 106 using namespace flightgear;
 107
 108 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 109 public:
 110   FGHintUpdateCallback(const char* configNode) :
 111     mConfigNode(fgGetNode(configNode, true))
 112   { }
 113   virtual void operator()(osg::StateAttribute* stateAttribute,
 114                           osg::NodeVisitor*)
 115   {
 116     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 117     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 118
 119     const char* value = mConfigNode->getStringValue();
 120     if (!value)
 121       hint->setMode(GL_DONT_CARE);
 122     else if (0 == strcmp(value, "nicest"))
 123       hint->setMode(GL_NICEST);
 124     else if (0 == strcmp(value, "fastest"))
 125       hint->setMode(GL_FASTEST);
 126     else
 127       hint->setMode(GL_DONT_CARE);
 128   }
 129 private:
 130   SGSharedPtr<SGPropertyNode> mConfigNode;
 131 };
 132
 133
 134 class SGPuDrawable : public osg::Drawable {
 135 public:
 136   SGPuDrawable()
 137   {
 138     // Dynamic stuff, do not store geometry
 139     setUseDisplayList(false);
 140
 141     osg::StateSet* stateSet = getOrCreateStateSet();
 142     stateSet->setRenderBinDetails(1001, "RenderBin");
 143     // speed optimization?
 144     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 145     // We can do translucent menus, so why not. :-)
 146     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 147     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 148     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 149
 150     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 151
 152     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 153     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 154   }
 155   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 156   { drawImplementation(*renderInfo.getState()); }
 157   void drawImplementation(osg::State& state) const
 158   {
 159     state.setActiveTextureUnit(0);
 160     state.setClientActiveTextureUnit(0);
 161
 162     state.disableAllVertexArrays();
 163
 164     glPushAttrib(GL_ALL_ATTRIB_BITS);
 165     glPushClientAttrib(~0u);
 166
 167     puDisplay();
 168
 169     glPopClientAttrib();
 170     glPopAttrib();
 171   }
 172
 173   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 174   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 175
 176 private:
 177 };
 178
 179 class SGHUDAndPanelDrawable : public osg::Drawable {
 180 public:
 181   SGHUDAndPanelDrawable()
 182   {
 183     // Dynamic stuff, do not store geometry
 184     setUseDisplayList(false);
 185
 186     osg::StateSet* stateSet = getOrCreateStateSet();
 187     stateSet->setRenderBinDetails(1000, "RenderBin");
 188
 189     // speed optimization?
 190     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 191     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 192     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 193     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 194     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 195
 196     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 197   }
 198   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 199   { drawImplementation(*renderInfo.getState()); }
 200   void drawImplementation(osg::State& state) const
 201   {
 202     state.setActiveTextureUnit(0);
 203     state.setClientActiveTextureUnit(0);
 204     state.disableAllVertexArrays();
 205
 206     glPushAttrib(GL_ALL_ATTRIB_BITS);
 207     glPushClientAttrib(~0u);
 208
 209     fgCockpitUpdate(&state);
 210
 211     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 212     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 213     hud->draw(state);
 214
 215     // update the panel subsystem
 216     if ( globals->get_current_panel() != NULL )
 217         globals->get_current_panel()->update(state);
 218     // We don't need a state here - can be safely removed when we can pick
 219     // correctly
 220     fgUpdate3DPanels();
 221
 222     glPopClientAttrib();
 223     glPopAttrib();
 224
 225   }
 226
 227   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 228   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 229
 230 private:
 231 };
 232
 233 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 234 public:
 235   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 236   {
 237     assert(dynamic_cast<osg::LightSource*>(node));
 238     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 239     osg::Light* light = lightSource->getLight();
 240
 241     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 242     light->setAmbient(toOsg(l->scene_ambient()));
 243     light->setDiffuse(toOsg(l->scene_diffuse()));
 244     light->setSpecular(toOsg(l->scene_specular()));
 245     osg::Vec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 246     light->setPosition(position);
 247     osg::Vec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 248     light->setDirection(direction);
 249     light->setSpotExponent(0);
 250     light->setSpotCutoff(180);
 251     light->setConstantAttenuation(1);
 252     light->setLinearAttenuation(0);
 253     light->setQuadraticAttenuation(0);
 254
 255     traverse(node, nv);
 256   }
 257 };
 258
 259 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 260 public:
 261   FGWireFrameModeUpdateCallback() :
 262     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 263   { }
 264   virtual void operator()(osg::StateAttribute* stateAttribute,
 265                           osg::NodeVisitor*)
 266   {
 267     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 268     osg::PolygonMode* polygonMode;
 269     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 270
 271     if (mWireframe->getBoolValue())
 272       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 273                            osg::PolygonMode::LINE);
 274     else
 275       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 276                            osg::PolygonMode::FILL);
 277   }
 278 private:
 279   SGSharedPtr<SGPropertyNode> mWireframe;
 280 };
 281
 282 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 283 public:
 284   FGLightModelUpdateCallback() :
 285     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 286   { }
 287   virtual void operator()(osg::StateAttribute* stateAttribute,
 288                           osg::NodeVisitor*)
 289   {
 290     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 291     osg::LightModel* lightModel;
 292     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 293
 294 #if 0
 295     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 296     lightModel->setAmbientIntensity(toOsg(l->scene_ambient());
 297 #else
 298     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 299 #endif
 300     lightModel->setTwoSided(true);
 301     lightModel->setLocalViewer(false);
 302
 303     if (mHighlights->getBoolValue()) {
 304       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 305     } else {
 306       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 307     }
 308   }
 309 private:
 310   SGSharedPtr<SGPropertyNode> mHighlights;
 311 };
 312
 313 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 314 public:
 315   FGFogEnableUpdateCallback() :
 316     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 317   { }
 318   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 319   {
 320     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 321       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 322     } else {
 323       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 324     }
 325   }
 326 private:
 327   SGSharedPtr<SGPropertyNode> mFogEnabled;
 328 };
 329
 330 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 331 public:
 332   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 333   {
 334     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 335     assert(dynamic_cast<osg::Fog*>(sa));
 336     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 337     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 338     fog->setMode(osg::Fog::EXP2);
 339     fog->setColor(toOsg(updateVisitor->getFogColor()));
 340     fog->setDensity(updateVisitor->getFogExp2Density());
 341   }
 342 };
 343
 344 // update callback for the switch node guarding that splash
 345 class FGScenerySwitchCallback : public osg::NodeCallback {
 346 public:
 347   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 348   {
 349     assert(dynamic_cast<osg::Switch*>(node));
 350     osg::Switch* sw = static_cast<osg::Switch*>(node);
 351
 352     double t = globals->get_sim_time_sec();
 353     bool enabled = 0 < t;
 354     sw->setValue(0, enabled);
 355     if (!enabled)
 356       return;
 357     traverse(node, nv);
 358   }
 359 };
 360
 361 // Sky structures
 362 SGSky *thesky;
 363
 364 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 365 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 366
 367 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 368
 369 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 370
 371 FGRenderer::FGRenderer()
 372 {
 373 #ifdef FG_JPEG_SERVER
 374    jpgRenderFrame = FGRenderer::update;
 375 #endif
 376    eventHandler = new FGEventHandler;
 377 }
 378
 379 FGRenderer::~FGRenderer()
 380 {
 381 #ifdef FG_JPEG_SERVER
 382    jpgRenderFrame = NULL;
 383 #endif
 384 }
 385
 386 // Initialize various GL/view parameters
 387 // XXX This should be called "preinit" or something, as it initializes
 388 // critical parts of the scene graph in addition to the splash screen.
 389 void
 390 FGRenderer::splashinit( void ) {
 391     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 392     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 393     mRealRoot->addChild(fgCreateSplashNode());
 394     mFrameStamp = viewer->getFrameStamp();
 395     // Scene doesn't seem to pass the frame stamp to the update
 396     // visitor automatically.
 397     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 398     viewer->setUpdateVisitor(mUpdateVisitor.get());
 399 }
 400
 401 void
 402 FGRenderer::init( void )
 403 {
 404     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 405     osg::initNotifyLevel();
 406
 407     // The number of polygon-offset "units" to place between layers.  In
 408     // principle, one is supposed to be enough.  In practice, I find that
 409     // my hardware/driver requires many more.
 410     osg::PolygonOffset::setUnitsMultiplier(1);
 411     osg::PolygonOffset::setFactorMultiplier(1);
 412
 413     // Go full screen if requested ...
 414     if ( fgGetBool("/sim/startup/fullscreen") )
 415         fgOSFullScreen();
 416
 417     viewer->getCamera()
 418         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 419
 420     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 421
 422     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 423
 424     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 425     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 426
 427     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 428     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 429     stateSet->setAttribute(new osg::BlendFunc);
 430     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 431
 432     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 433
 434     // this will be set below
 435     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 436
 437     osg::Material* material = new osg::Material;
 438     stateSet->setAttribute(material);
 439
 440     stateSet->setTextureAttribute(0, new osg::TexEnv);
 441     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 442
 443     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 444     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 445     stateSet->setAttribute(hint);
 446     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 447     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 448     stateSet->setAttribute(hint);
 449     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 450     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 451     stateSet->setAttribute(hint);
 452     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 453     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 454     stateSet->setAttribute(hint);
 455     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 456     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 457     stateSet->setAttribute(hint);
 458
 459     osg::Group* sceneGroup = new osg::Group;
 460     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 461     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 462
 463     //sceneGroup->addChild(thesky->getCloudRoot());
 464
 465     stateSet = sceneGroup->getOrCreateStateSet();
 466     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 467
 468     // need to update the light on every frame
 469     osg::LightSource* lightSource = new osg::LightSource;
 470     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 471     // relative because of CameraView being just a clever transform node
 472     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 473     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 474
 475     lightSource->addChild(sceneGroup);
 476     lightSource->addChild(thesky->getPreRoot());
 477     mRoot->addChild(lightSource);
 478
 479     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 480     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 481     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 482     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 483
 484     // enable disable specular highlights.
 485     // is the place where we might plug in an other fragment shader ...
 486     osg::LightModel* lightModel = new osg::LightModel;
 487     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 488     stateSet->setAttribute(lightModel);
 489
 490     // switch to enable wireframe
 491     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 492     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 493     stateSet->setAttributeAndModes(polygonMode);
 494
 495     // scene fog handling
 496     osg::Fog* fog = new osg::Fog;
 497     fog->setUpdateCallback(new FGFogUpdateCallback);
 498     stateSet->setAttributeAndModes(fog);
 499     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 500
 501     // plug in the GUI
 502     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
 503     if (guiCamera) {
 504         osg::Geode* geode = new osg::Geode;
 505         geode->addDrawable(new SGPuDrawable);
 506         geode->addDrawable(new SGHUDAndPanelDrawable);
 507         guiCamera->addChild(geode);
 508     }
 509     osg::Switch* sw = new osg::Switch;
 510     sw->setUpdateCallback(new FGScenerySwitchCallback);
 511     sw->addChild(mRoot.get());
 512     mRealRoot->addChild(sw);
 513     mRealRoot->addChild(thesky->getCloudRoot());
 514     mRealRoot->addChild(FGCreateRedoutNode());
 515 }
 516
 517
 518 // Update all Visuals (redraws anything graphics related)
 519 void
 520 FGRenderer::update( bool refresh_camera_settings ) {
 521     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 522                           || fgGetBool("sim/sceneryloaded-override");
 523     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 524     if ( idle_state < 1000 || !scenery_loaded ) {
 525         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 526
 527         // Keep resetting sim time while the sim is initializing
 528         // the splash screen is now in the scenegraph
 529         globals->set_sim_time_sec( 0.0 );
 530         return;
 531     }
 532
 533     // Fade out the splash screen over the first three seconds.
 534     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 535     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 536
 537     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 538     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 539     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 540     bool distance_attenuation
 541         = fgGetBool("/sim/rendering/distance-attenuation");
 542     // OSGFIXME
 543     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 544                                   distance_attenuation );
 545
 546     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 547
 548     // update fog params
 549     double actual_visibility;
 550     if (fgGetBool("/environment/clouds/status")) {
 551         actual_visibility = thesky->get_visibility();
 552     } else {
 553         actual_visibility = fgGetDouble("/environment/visibility-m");
 554     }
 555
 556     // idle_state is now 1000 meaning we've finished all our
 557     // initializations and are running the main loop, so this will
 558     // now work without seg faulting the system.
 559
 560     FGViewer *current__view = globals->get_current_view();
 561     // Force update of center dependent values ...
 562     current__view->set_dirty();
 563
 564     if ( refresh_camera_settings ) {
 565         // update view port
 566         resize( fgGetInt("/sim/startup/xsize"),
 567                 fgGetInt("/sim/startup/ysize") );
 568     }
 569     osg::Camera *camera = viewer->getCamera();
 570
 571     if ( skyblend ) {
 572
 573         if ( fgGetBool("/sim/rendering/textures") ) {
 574             SGVec4f clearColor(l->adj_fog_color());
 575             camera->setClearColor(toOsg(clearColor));
 576         }
 577     } else {
 578         SGVec4f clearColor(l->sky_color());
 579         camera->setClearColor(toOsg(clearColor));
 580     }
 581
 582     // update fog params if visibility has changed
 583     double visibility_meters = fgGetDouble("/environment/visibility-m");
 584     thesky->set_visibility(visibility_meters);
 585
 586     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 587                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 588                         / (double)fgGetInt("/sim/model-hz") );
 589
 590     // update the sky dome
 591     if ( skyblend ) {
 592
 593         // The sun and moon distances are scaled down versions
 594         // of the actual distance to get both the moon and the sun
 595         // within the range of the far clip plane.
 596         // Moon distance:    384,467 kilometers
 597         // Sun distance: 150,000,000 kilometers
 598
 599         double sun_horiz_eff, moon_horiz_eff;
 600         if (fgGetBool("/sim/rendering/horizon-effect")) {
 601             sun_horiz_eff
 602                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
 603                                              0.0),
 604                              0.33) / 3.0;
 605             moon_horiz_eff
 606                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
 607                                              0.0),
 608                              0.33)/3.0;
 609         } else {
 610            sun_horiz_eff = moon_horiz_eff = 1.0;
 611         }
 612
 613         SGSkyState sstate;
 614
 615         SGVec3d viewPos = current__view->getViewPosition();
 616         sstate.view_pos  = toVec3f(viewPos);
 617         SGGeod geodViewPos = SGGeod::fromCart(viewPos);
 618         SGGeod geodZeroViewPos = SGGeod::fromGeodM(geodViewPos, 0);
 619         sstate.zero_elev = toVec3f(SGVec3d::fromGeod(geodZeroViewPos));
 620         SGQuatd hlOr = SGQuatd::fromLonLat(geodViewPos);
 621         sstate.view_up   = toVec3f(hlOr.backTransform(-SGVec3d::e3()));
 622         sstate.lon       = geodViewPos.getLongitudeRad();
 623         sstate.lat       = geodViewPos.getLatitudeRad();
 624         sstate.alt       = geodViewPos.getElevationM();
 625         sstate.spin      = l->get_sun_rotation();
 626         sstate.gst       = globals->get_time_params()->getGst();
 627         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 628         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 629         sstate.sun_angle = l->get_sun_angle();
 630
 631
 632         /*
 633          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 634          << l->sky_color()[0] << " "
 635          << l->sky_color()[1] << " "
 636          << l->sky_color()[2] << " "
 637          << l->sky_color()[3] );
 638         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 639          << l->fog_color()[0] << " "
 640          << l->fog_color()[1] << " "
 641          << l->fog_color()[2] << " "
 642          << l->fog_color()[3] );
 643         SG_LOG( SG_GENERAL, SG_BULK,
 644                 "    sun_angle = " << l->sun_angle
 645          << "    moon_angle = " << l->moon_angle );
 646         */
 647
 648         SGSkyColor scolor;
 649
 650         scolor.sky_color   = SGVec3f(l->sky_color().data());
 651         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
 652         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 653         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 654         scolor.sun_angle   = l->get_sun_angle();
 655         scolor.moon_angle  = l->get_moon_angle();
 656
 657         thesky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
 658         thesky->repaint( scolor, *globals->get_ephem() );
 659
 660         /*
 661         SG_LOG( SG_GENERAL, SG_BULK,
 662                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 663          << view_pos[1] << " " << view_pos[2] );
 664         SG_LOG( SG_GENERAL, SG_BULK,
 665                 "    zero_elev = " << zero_elev[0] << " "
 666          << zero_elev[1] << " " << zero_elev[2]
 667          << " lon = " << cur_fdm_state->get_Longitude()
 668          << " lat = " << cur_fdm_state->get_Latitude() );
 669         SG_LOG( SG_GENERAL, SG_BULK,
 670                 "    sun_rot = " << l->get_sun_rotation
 671          << " gst = " << SGTime::cur_time_params->getGst() );
 672         SG_LOG( SG_GENERAL, SG_BULK,
 673              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 674           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 675           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 676           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 677         */
 678
 679         //OSGFIXME
 680 //         shadows->setupShadows(
 681 //           current__view->getLongitude_deg(),
 682 //           current__view->getLatitude_deg(),
 683 //           globals->get_time_params()->getGst(),
 684 //           globals->get_ephem()->getSunRightAscension(),
 685 //           globals->get_ephem()->getSunDeclination(),
 686 //           l->get_sun_angle());
 687
 688     }
 689
 690 //     sgEnviro.setLight(l->adj_fog_color());
 691 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 692 //         current__view->get_world_up(),
 693 //         current__view->getLongitude_deg(),
 694 //         current__view->getLatitude_deg(),
 695 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 696 //         delta_time_sec);
 697
 698     // OSGFIXME
 699 //     sgEnviro.drawLightning();
 700
 701 //        double current_view_origin_airspeed_horiz_kt =
 702 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 703 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 704 //                                * SGD_DEGREES_TO_RADIANS);
 705
 706     // OSGFIXME
 707 //     if( is_internal )
 708 //         shadows->endOfFrame();
 709
 710     // need to call the update visitor once
 711     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 712     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 713                                 current__view->getViewOrientation());
 714     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 715     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 716                              l->scene_diffuse(), l->scene_specular(),
 717                              l->adj_fog_color(),
 718                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 719     mUpdateVisitor->setVisibility(actual_visibility);
 720     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 721     bool hotspots = fgGetBool("/sim/panel-hotspots");
 722     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 723     cullMask |= simgear::GroundLightManager::instance()
 724         ->getLightNodeMask(mUpdateVisitor.get());
 725     if (hotspots)
 726         cullMask |= simgear::PICK_BIT;
 727     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
 728 }
 729
 730
 731
 732 // options.cxx needs to see this for toggle_panel()
 733 // Handle new window size or exposure
 734 void
 735 FGRenderer::resize( int width, int height ) {
 736     int view_h;
 737
 738     if ( (!fgGetBool("/sim/virtual-cockpit"))
 739          && fgPanelVisible() && idle_state == 1000 ) {
 740         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 741                              globals->get_current_panel()->getYOffset()) / 768.0);
 742     } else {
 743         view_h = height;
 744     }
 745
 746     static int lastwidth = 0;
 747     static int lastheight = 0;
 748     if (width != lastwidth)
 749         fgSetInt("/sim/startup/xsize", lastwidth = width);
 750     if (height != lastheight)
 751         fgSetInt("/sim/startup/ysize", lastheight = height);
 752
 753     // for all views
 754     FGViewMgr *viewmgr = globals->get_viewmgr();
 755     if (viewmgr) {
 756       for ( int i = 0; i < viewmgr->size(); ++i ) {
 757         viewmgr->get_view(i)->
 758           set_aspect_ratio((float)view_h / (float)width);
 759       }
 760     }
 761 }
 762
 763 bool
 764 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 765                  const osgGA::GUIEventAdapter* ea)
 766 {
 767     // wipe out the return ...
 768     pickList.clear();
 769     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 770     Intersections intersections;
 771
 772     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 773         return false;
 774     for (Intersections::iterator hit = intersections.begin(),
 775              e = intersections.end();
 776          hit != e;
 777          ++hit) {
 778         const osg::NodePath& np = hit->nodePath;
 779         osg::NodePath::const_reverse_iterator npi;
 780         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 781             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 782             if (!ud)
 783                 continue;
 784             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 785                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 786                 if (!pickCallback)
 787                     continue;
 788                 SGSceneryPick sceneryPick;
 789                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
 790                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
 791                 sceneryPick.callback = pickCallback;
 792                 pickList.push_back(sceneryPick);
 793             }
 794         }
 795     }
 796     return !pickList.empty();
 797 }
 798
 799 void
 800 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
 801 {
 802     viewer = viewer_;
 803 }
 804
 805 void
 806 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
 807 {
 808     eventHandler = eventHandler_;
 809 }
 810
 811 void
 812 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 813 {
 814     mRealRoot->addChild(camera);
 815 }
 816
 817 bool
 818 fgDumpSceneGraphToFile(const char* filename)
 819 {
 820     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 821 }
 822
 823 bool
 824 fgDumpTerrainBranchToFile(const char* filename)
 825 {
 826     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 827                                  filename );
 828 }
 829
 830 // For debugging
 831 bool
 832 fgDumpNodeToFile(osg::Node* node, const char* filename)
 833 {
 834     return osgDB::writeNodeFile(*node, filename);
 835 }
 836 // end of renderer.cxx
 837