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/tgdb/GroundLightManager.hxx>
  67 #include <simgear/scene/tgdb/pt_lights.hxx>
  68 #include <simgear/props/props.hxx>
  69 #include <simgear/timing/sg_time.hxx>
  70 #include <simgear/ephemeris/ephemeris.hxx>
  71 #include <simgear/math/sg_random.h>
  72 #ifdef FG_JPEG_SERVER
  73 #include <simgear/screen/jpgfactory.hxx>
  74 #endif
  75
  76 #include <simgear/environment/visual_enviro.hxx>
  77
  78 #include <Time/light.hxx>
  79 #include <Time/light.hxx>
  80 #include <Aircraft/aircraft.hxx>
  81 #include <Cockpit/panel.hxx>
  82 #include <Cockpit/cockpit.hxx>
  83 #include <Cockpit/hud.hxx>
  84 #include <Model/panelnode.hxx>
  85 #include <Model/modelmgr.hxx>
  86 #include <Model/acmodel.hxx>
  87 #include <Scenery/scenery.hxx>
  88 #include <Scenery/redout.hxx>
  89 #include <Scenery/tilemgr.hxx>
  90 #include <GUI/new_gui.hxx>
  91 #include <Instrumentation/instrument_mgr.hxx>
  92 #include <Instrumentation/HUD/HUD.hxx>
  93 #include <Environment/precipitation_mgr.hxx>
  94
  95 #include <Include/general.hxx>
  96 #include "splash.hxx"
  97 #include "renderer.hxx"
  98 #include "main.hxx"
  99 #include "CameraGroup.hxx"
 100 #include "FGEventHandler.hxx"
 101
 102 // XXX Make this go away when OSG 2.2 is released.
 103 #if (FG_OSG_VERSION >= 21004)
 104 #define UPDATE_VISITOR_IN_VIEWER 1
 105 #endif
 106
 107 using namespace osg;
 108 using namespace simgear;
 109 using namespace flightgear;
 110
 111 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 112 public:
 113   FGHintUpdateCallback(const char* configNode) :
 114     mConfigNode(fgGetNode(configNode, true))
 115   { }
 116   virtual void operator()(osg::StateAttribute* stateAttribute,
 117                           osg::NodeVisitor*)
 118   {
 119     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 120     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 121
 122     const char* value = mConfigNode->getStringValue();
 123     if (!value)
 124       hint->setMode(GL_DONT_CARE);
 125     else if (0 == strcmp(value, "nicest"))
 126       hint->setMode(GL_NICEST);
 127     else if (0 == strcmp(value, "fastest"))
 128       hint->setMode(GL_FASTEST);
 129     else
 130       hint->setMode(GL_DONT_CARE);
 131   }
 132 private:
 133   SGSharedPtr<SGPropertyNode> mConfigNode;
 134 };
 135
 136
 137 class SGPuDrawable : public osg::Drawable {
 138 public:
 139   SGPuDrawable()
 140   {
 141     // Dynamic stuff, do not store geometry
 142     setUseDisplayList(false);
 143
 144     osg::StateSet* stateSet = getOrCreateStateSet();
 145     stateSet->setRenderBinDetails(1001, "RenderBin");
 146     // speed optimization?
 147     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 148     // We can do translucent menus, so why not. :-)
 149     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 150     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 151     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 152
 153     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 154
 155     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 156     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 157   }
 158   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 159   { drawImplementation(*renderInfo.getState()); }
 160   void drawImplementation(osg::State& state) const
 161   {
 162     state.setActiveTextureUnit(0);
 163     state.setClientActiveTextureUnit(0);
 164
 165     state.disableAllVertexArrays();
 166
 167     glPushAttrib(GL_ALL_ATTRIB_BITS);
 168     glPushClientAttrib(~0u);
 169
 170     puDisplay();
 171
 172     glPopClientAttrib();
 173     glPopAttrib();
 174   }
 175
 176   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 177   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 178
 179 private:
 180 };
 181
 182 class SGHUDAndPanelDrawable : public osg::Drawable {
 183 public:
 184   SGHUDAndPanelDrawable()
 185   {
 186     // Dynamic stuff, do not store geometry
 187     setUseDisplayList(false);
 188
 189     osg::StateSet* stateSet = getOrCreateStateSet();
 190     stateSet->setRenderBinDetails(1000, "RenderBin");
 191
 192     // speed optimization?
 193     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 194     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 195     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 196     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 197     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 198
 199     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 200   }
 201   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 202   { drawImplementation(*renderInfo.getState()); }
 203   void drawImplementation(osg::State& state) const
 204   {
 205     state.setActiveTextureUnit(0);
 206     state.setClientActiveTextureUnit(0);
 207     state.disableAllVertexArrays();
 208
 209     glPushAttrib(GL_ALL_ATTRIB_BITS);
 210     glPushClientAttrib(~0u);
 211
 212     fgCockpitUpdate(&state);
 213
 214     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 215     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 216     hud->draw(state);
 217
 218     // update the panel subsystem
 219     if ( globals->get_current_panel() != NULL )
 220         globals->get_current_panel()->update(state);
 221     // We don't need a state here - can be safely removed when we can pick
 222     // correctly
 223     fgUpdate3DPanels();
 224
 225     glPopClientAttrib();
 226     glPopAttrib();
 227
 228   }
 229
 230   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 231   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 232
 233 private:
 234 };
 235
 236 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 237 public:
 238   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 239   {
 240     assert(dynamic_cast<osg::LightSource*>(node));
 241     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 242     osg::Light* light = lightSource->getLight();
 243
 244     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 245     light->setAmbient(l->scene_ambient().osg());
 246     light->setDiffuse(l->scene_diffuse().osg());
 247     light->setSpecular(l->scene_specular().osg());
 248     SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 249     light->setPosition(position.osg());
 250     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 251     light->setDirection(direction.osg());
 252     light->setSpotExponent(0);
 253     light->setSpotCutoff(180);
 254     light->setConstantAttenuation(1);
 255     light->setLinearAttenuation(0);
 256     light->setQuadraticAttenuation(0);
 257
 258     traverse(node, nv);
 259   }
 260 };
 261
 262 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 263 public:
 264   FGWireFrameModeUpdateCallback() :
 265     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 266   { }
 267   virtual void operator()(osg::StateAttribute* stateAttribute,
 268                           osg::NodeVisitor*)
 269   {
 270     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 271     osg::PolygonMode* polygonMode;
 272     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 273
 274     if (mWireframe->getBoolValue())
 275       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 276                            osg::PolygonMode::LINE);
 277     else
 278       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 279                            osg::PolygonMode::FILL);
 280   }
 281 private:
 282   SGSharedPtr<SGPropertyNode> mWireframe;
 283 };
 284
 285 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 286 public:
 287   FGLightModelUpdateCallback() :
 288     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 289   { }
 290   virtual void operator()(osg::StateAttribute* stateAttribute,
 291                           osg::NodeVisitor*)
 292   {
 293     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 294     osg::LightModel* lightModel;
 295     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 296
 297 #if 0
 298     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 299     lightModel->setAmbientIntensity(l->scene_ambient().osg());
 300 #else
 301     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 302 #endif
 303     lightModel->setTwoSided(true);
 304     lightModel->setLocalViewer(false);
 305
 306     if (mHighlights->getBoolValue()) {
 307       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 308     } else {
 309       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 310     }
 311   }
 312 private:
 313   SGSharedPtr<SGPropertyNode> mHighlights;
 314 };
 315
 316 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 317 public:
 318   FGFogEnableUpdateCallback() :
 319     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 320   { }
 321   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 322   {
 323     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 324       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 325     } else {
 326       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 327     }
 328   }
 329 private:
 330   SGSharedPtr<SGPropertyNode> mFogEnabled;
 331 };
 332
 333 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 334 public:
 335   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 336   {
 337     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 338     assert(dynamic_cast<osg::Fog*>(sa));
 339     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 340     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 341     fog->setMode(osg::Fog::EXP2);
 342     fog->setColor(updateVisitor->getFogColor().osg());
 343     fog->setDensity(updateVisitor->getFogExp2Density());
 344   }
 345 };
 346
 347 // update callback for the switch node guarding that splash
 348 class FGScenerySwitchCallback : public osg::NodeCallback {
 349 public:
 350   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 351   {
 352     assert(dynamic_cast<osg::Switch*>(node));
 353     osg::Switch* sw = static_cast<osg::Switch*>(node);
 354
 355     double t = globals->get_sim_time_sec();
 356     bool enabled = 0 < t;
 357     sw->setValue(0, enabled);
 358     if (!enabled)
 359       return;
 360     traverse(node, nv);
 361   }
 362 };
 363
 364 // Sky structures
 365 SGSky *thesky;
 366
 367 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 368 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 369
 370 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 371
 372 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 373
 374 FGRenderer::FGRenderer()
 375 {
 376 #ifdef FG_JPEG_SERVER
 377    jpgRenderFrame = FGRenderer::update;
 378 #endif
 379    eventHandler = new FGEventHandler;
 380 }
 381
 382 FGRenderer::~FGRenderer()
 383 {
 384 #ifdef FG_JPEG_SERVER
 385    jpgRenderFrame = NULL;
 386 #endif
 387 }
 388
 389 // Initialize various GL/view parameters
 390 // XXX This should be called "preinit" or something, as it initializes
 391 // critical parts of the scene graph in addition to the splash screen.
 392 void
 393 FGRenderer::splashinit( void ) {
 394     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 395     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 396     mRealRoot->addChild(fgCreateSplashNode());
 397     mFrameStamp = viewer->getFrameStamp();
 398     // Scene doesn't seem to pass the frame stamp to the update
 399     // visitor automatically.
 400     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 401 #ifdef UPDATE_VISITOR_IN_VIEWER
 402     viewer->setUpdateVisitor(mUpdateVisitor.get());
 403 #else
 404     osgViewer::Scene* scene = viewer->getScene();
 405     scene->setUpdateVisitor(mUpdateVisitor.get());
 406 #endif
 407 }
 408
 409 void
 410 FGRenderer::init( void )
 411 {
 412     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 413     osg::initNotifyLevel();
 414
 415     // The number of polygon-offset "units" to place between layers.  In
 416     // principle, one is supposed to be enough.  In practice, I find that
 417     // my hardware/driver requires many more.
 418     osg::PolygonOffset::setUnitsMultiplier(1);
 419     osg::PolygonOffset::setFactorMultiplier(1);
 420
 421     // Go full screen if requested ...
 422     if ( fgGetBool("/sim/startup/fullscreen") )
 423         fgOSFullScreen();
 424
 425     viewer->getCamera()
 426         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 427
 428     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 429
 430     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 431
 432     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 433     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 434
 435     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 436     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 437     stateSet->setAttribute(new osg::BlendFunc);
 438     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 439
 440     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 441
 442     // this will be set below
 443     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 444
 445     osg::Material* material = new osg::Material;
 446     stateSet->setAttribute(material);
 447
 448     stateSet->setTextureAttribute(0, new osg::TexEnv);
 449     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 450
 451     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 452     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 453     stateSet->setAttribute(hint);
 454     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 455     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 456     stateSet->setAttribute(hint);
 457     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 458     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 459     stateSet->setAttribute(hint);
 460     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 461     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 462     stateSet->setAttribute(hint);
 463     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 464     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 465     stateSet->setAttribute(hint);
 466
 467     osg::Group* sceneGroup = new osg::Group;
 468     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 469     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 470
 471     //sceneGroup->addChild(thesky->getCloudRoot());
 472
 473     stateSet = sceneGroup->getOrCreateStateSet();
 474     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 475
 476     // need to update the light on every frame
 477     osg::LightSource* lightSource = new osg::LightSource;
 478     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 479     // relative because of CameraView being just a clever transform node
 480     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 481     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 482
 483     lightSource->addChild(sceneGroup);
 484     lightSource->addChild(thesky->getPreRoot());
 485     mRoot->addChild(lightSource);
 486
 487     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 488     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 489     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 490     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 491
 492     // enable disable specular highlights.
 493     // is the place where we might plug in an other fragment shader ...
 494     osg::LightModel* lightModel = new osg::LightModel;
 495     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 496     stateSet->setAttribute(lightModel);
 497
 498     // switch to enable wireframe
 499     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 500     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 501     stateSet->setAttributeAndModes(polygonMode);
 502
 503     // scene fog handling
 504     osg::Fog* fog = new osg::Fog;
 505     fog->setUpdateCallback(new FGFogUpdateCallback);
 506     stateSet->setAttributeAndModes(fog);
 507     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 508
 509     // plug in the GUI
 510     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
 511     if (guiCamera) {
 512         osg::Geode* geode = new osg::Geode;
 513         geode->addDrawable(new SGPuDrawable);
 514         geode->addDrawable(new SGHUDAndPanelDrawable);
 515         guiCamera->addChild(geode);
 516     }
 517     osg::Switch* sw = new osg::Switch;
 518     sw->setUpdateCallback(new FGScenerySwitchCallback);
 519     sw->addChild(mRoot.get());
 520     mRealRoot->addChild(sw);
 521     mRealRoot->addChild(thesky->getCloudRoot());
 522     mRealRoot->addChild(FGCreateRedoutNode());
 523 }
 524
 525
 526 // Update all Visuals (redraws anything graphics related)
 527 void
 528 FGRenderer::update( bool refresh_camera_settings ) {
 529     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 530                           || fgGetBool("sim/sceneryloaded-override");
 531     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 532     if ( idle_state < 1000 || !scenery_loaded ) {
 533         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 534
 535         // Keep resetting sim time while the sim is initializing
 536         // the splash screen is now in the scenegraph
 537         globals->set_sim_time_sec( 0.0 );
 538         return;
 539     }
 540
 541     // Fade out the splash screen over the first three seconds.
 542     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 543     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 544
 545     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 546     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 547     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 548     bool distance_attenuation
 549         = fgGetBool("/sim/rendering/distance-attenuation");
 550     // OSGFIXME
 551     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 552                                   distance_attenuation );
 553
 554     static const SGPropertyNode *groundlevel_nearplane
 555         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 556
 557     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 558
 559     // update fog params
 560     double actual_visibility;
 561     if (fgGetBool("/environment/clouds/status")) {
 562         actual_visibility = thesky->get_visibility();
 563     } else {
 564         actual_visibility = fgGetDouble("/environment/visibility-m");
 565     }
 566
 567     // idle_state is now 1000 meaning we've finished all our
 568     // initializations and are running the main loop, so this will
 569     // now work without seg faulting the system.
 570
 571     FGViewer *current__view = globals->get_current_view();
 572     // Force update of center dependent values ...
 573     current__view->set_dirty();
 574
 575     if ( refresh_camera_settings ) {
 576         // update view port
 577         resize( fgGetInt("/sim/startup/xsize"),
 578                 fgGetInt("/sim/startup/ysize") );
 579     }
 580     osg::Camera *camera = viewer->getCamera();
 581
 582     if ( skyblend ) {
 583
 584         if ( fgGetBool("/sim/rendering/textures") ) {
 585             SGVec4f clearColor(l->adj_fog_color());
 586             camera->setClearColor(clearColor.osg());
 587         }
 588     } else {
 589         SGVec4f clearColor(l->sky_color());
 590         camera->setClearColor(clearColor.osg());
 591     }
 592
 593     // update fog params if visibility has changed
 594     double visibility_meters = fgGetDouble("/environment/visibility-m");
 595     thesky->set_visibility(visibility_meters);
 596
 597     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 598                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 599                         / (double)fgGetInt("/sim/model-hz") );
 600
 601     // update the sky dome
 602     if ( skyblend ) {
 603
 604         // The sun and moon distances are scaled down versions
 605         // of the actual distance to get both the moon and the sun
 606         // within the range of the far clip plane.
 607         // Moon distance:    384,467 kilometers
 608         // Sun distance: 150,000,000 kilometers
 609
 610         double sun_horiz_eff, moon_horiz_eff;
 611         if (fgGetBool("/sim/rendering/horizon-effect")) {
 612             sun_horiz_eff
 613                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
 614                                              0.0),
 615                              0.33) / 3.0;
 616             moon_horiz_eff
 617                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
 618                                              0.0),
 619                              0.33)/3.0;
 620         } else {
 621            sun_horiz_eff = moon_horiz_eff = 1.0;
 622         }
 623
 624         static SGSkyState sstate;
 625
 626         sstate.view_pos  = toVec3f(current__view->get_view_pos());
 627         sstate.zero_elev = toVec3f(current__view->get_zero_elev());
 628         sstate.view_up   = current__view->get_world_up();
 629         sstate.lon       = current__view->getLongitude_deg()
 630                             * SGD_DEGREES_TO_RADIANS;
 631         sstate.lat       = current__view->getLatitude_deg()
 632                             * SGD_DEGREES_TO_RADIANS;
 633         sstate.alt       = current__view->getAltitudeASL_ft()
 634                             * SG_FEET_TO_METER;
 635         sstate.spin      = l->get_sun_rotation();
 636         sstate.gst       = globals->get_time_params()->getGst();
 637         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 638         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 639         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 640         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 641         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 642         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 643         sstate.sun_angle = l->get_sun_angle();
 644
 645
 646         /*
 647          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 648          << l->sky_color()[0] << " "
 649          << l->sky_color()[1] << " "
 650          << l->sky_color()[2] << " "
 651          << l->sky_color()[3] );
 652         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 653          << l->fog_color()[0] << " "
 654          << l->fog_color()[1] << " "
 655          << l->fog_color()[2] << " "
 656          << l->fog_color()[3] );
 657         SG_LOG( SG_GENERAL, SG_BULK,
 658                 "    sun_angle = " << l->sun_angle
 659          << "    moon_angle = " << l->moon_angle );
 660         */
 661
 662         static SGSkyColor scolor;
 663
 664         scolor.sky_color   = SGVec3f(l->sky_color().data());
 665         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 666         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 667         scolor.sun_angle   = l->get_sun_angle();
 668         scolor.moon_angle  = l->get_moon_angle();
 669         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 670         scolor.nstars      = globals->get_ephem()->getNumStars();
 671         scolor.planet_data = globals->get_ephem()->getPlanets();
 672         scolor.star_data   = globals->get_ephem()->getStars();
 673
 674         thesky->reposition( sstate, delta_time_sec );
 675         thesky->repaint( scolor );
 676
 677         /*
 678         SG_LOG( SG_GENERAL, SG_BULK,
 679                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 680          << view_pos[1] << " " << view_pos[2] );
 681         SG_LOG( SG_GENERAL, SG_BULK,
 682                 "    zero_elev = " << zero_elev[0] << " "
 683          << zero_elev[1] << " " << zero_elev[2]
 684          << " lon = " << cur_fdm_state->get_Longitude()
 685          << " lat = " << cur_fdm_state->get_Latitude() );
 686         SG_LOG( SG_GENERAL, SG_BULK,
 687                 "    sun_rot = " << l->get_sun_rotation
 688          << " gst = " << SGTime::cur_time_params->getGst() );
 689         SG_LOG( SG_GENERAL, SG_BULK,
 690              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 691           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 692           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 693           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 694         */
 695
 696         //OSGFIXME
 697 //         shadows->setupShadows(
 698 //           current__view->getLongitude_deg(),
 699 //           current__view->getLatitude_deg(),
 700 //           globals->get_time_params()->getGst(),
 701 //           globals->get_ephem()->getSunRightAscension(),
 702 //           globals->get_ephem()->getSunDeclination(),
 703 //           l->get_sun_angle());
 704
 705     }
 706
 707 //     sgEnviro.setLight(l->adj_fog_color());
 708 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 709 //         current__view->get_world_up(),
 710 //         current__view->getLongitude_deg(),
 711 //         current__view->getLatitude_deg(),
 712 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 713 //         delta_time_sec);
 714
 715     // OSGFIXME
 716 //     sgEnviro.drawLightning();
 717
 718 //        double current_view_origin_airspeed_horiz_kt =
 719 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 720 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 721 //                                * SGD_DEGREES_TO_RADIANS);
 722
 723     // OSGFIXME
 724 //     if( is_internal )
 725 //         shadows->endOfFrame();
 726
 727     // need to call the update visitor once
 728     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 729     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 730                                 current__view->getViewOrientation());
 731     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 732     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 733                              l->scene_diffuse(), l->scene_specular(),
 734                              l->adj_fog_color(),
 735                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 736     mUpdateVisitor->setVisibility(actual_visibility);
 737     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 738     bool hotspots = fgGetBool("/sim/panel-hotspots");
 739     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 740     cullMask |= simgear::GroundLightManager::instance()
 741         ->getLightNodeMask(mUpdateVisitor.get());
 742     if (hotspots)
 743         cullMask |= simgear::PICK_BIT;
 744     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
 745 }
 746
 747
 748
 749 // options.cxx needs to see this for toggle_panel()
 750 // Handle new window size or exposure
 751 void
 752 FGRenderer::resize( int width, int height ) {
 753     int view_h;
 754
 755     if ( (!fgGetBool("/sim/virtual-cockpit"))
 756          && fgPanelVisible() && idle_state == 1000 ) {
 757         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 758                              globals->get_current_panel()->getYOffset()) / 768.0);
 759     } else {
 760         view_h = height;
 761     }
 762
 763     static int lastwidth = 0;
 764     static int lastheight = 0;
 765     if (width != lastwidth)
 766         fgSetInt("/sim/startup/xsize", lastwidth = width);
 767     if (height != lastheight)
 768         fgSetInt("/sim/startup/ysize", lastheight = height);
 769
 770     // for all views
 771     FGViewMgr *viewmgr = globals->get_viewmgr();
 772     if (viewmgr) {
 773       for ( int i = 0; i < viewmgr->size(); ++i ) {
 774         viewmgr->get_view(i)->
 775           set_aspect_ratio((float)view_h / (float)width);
 776       }
 777     }
 778 }
 779
 780 void FGRenderer::setCameraParameters(float vfov, float aspectRatio,
 781                                      float zNear, float zFar)
 782 {
 783     zNear = .1;
 784     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 785     viewer->getCamera()->setProjectionMatrixAsPerspective(vfov,
 786                                                           1.0f / aspectRatio,
 787                                                           zNear, zFar);
 788
 789 }
 790 bool
 791 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 792                  const osgGA::GUIEventAdapter* ea)
 793 {
 794     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 795     // wipe out the return ...
 796     pickList.clear();
 797     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 798     Intersections intersections;
 799
 800     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 801         return false;
 802     for (Intersections::iterator hit = intersections.begin(),
 803              e = intersections.end();
 804          hit != e;
 805          ++hit) {
 806         const osg::NodePath& np = hit->nodePath;
 807         osg::NodePath::const_reverse_iterator npi;
 808         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 809             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 810             if (!ud)
 811                 continue;
 812             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 813                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 814                 if (!pickCallback)
 815                     continue;
 816                 SGSceneryPick sceneryPick;
 817                 sceneryPick.info.local = SGVec3d(hit->getLocalIntersectPoint());
 818                 sceneryPick.info.wgs84 = SGVec3d(hit->getWorldIntersectPoint());
 819                 sceneryPick.callback = pickCallback;
 820                 pickList.push_back(sceneryPick);
 821             }
 822         }
 823     }
 824     return !pickList.empty();
 825 }
 826
 827 void
 828 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
 829 {
 830     viewer = viewer_;
 831 }
 832
 833 void
 834 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
 835 {
 836     eventHandler = eventHandler_;
 837 }
 838
 839 void
 840 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 841 {
 842     mRealRoot->addChild(camera);
 843 }
 844
 845 bool
 846 fgDumpSceneGraphToFile(const char* filename)
 847 {
 848     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 849 }
 850
 851 bool
 852 fgDumpTerrainBranchToFile(const char* filename)
 853 {
 854     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 855                                  filename );
 856 }
 857
 858 // For debugging
 859 bool
 860 fgDumpNodeToFile(osg::Node* node, const char* filename)
 861 {
 862     return osgDB::writeNodeFile(*node, filename);
 863 }
 864 // end of renderer.cxx
 865