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/structure/OSGUtils.hxx>
  70 #include <simgear/props/props.hxx>
  71 #include <simgear/timing/sg_time.hxx>
  72 #include <simgear/ephemeris/ephemeris.hxx>
  73 #include <simgear/math/sg_random.h>
  74 #ifdef FG_JPEG_SERVER
  75 #include <simgear/screen/jpgfactory.hxx>
  76 #endif
  77
  78 #include <simgear/environment/visual_enviro.hxx>
  79
  80 #include <Time/light.hxx>
  81 #include <Time/light.hxx>
  82 #include <Aircraft/aircraft.hxx>
  83 #include <Cockpit/panel.hxx>
  84 #include <Cockpit/cockpit.hxx>
  85 #include <Cockpit/hud.hxx>
  86 #include <Model/panelnode.hxx>
  87 #include <Model/modelmgr.hxx>
  88 #include <Model/acmodel.hxx>
  89 #include <Scenery/scenery.hxx>
  90 #include <Scenery/redout.hxx>
  91 #include <Scenery/tilemgr.hxx>
  92 #include <GUI/new_gui.hxx>
  93 #include <Instrumentation/instrument_mgr.hxx>
  94 #include <Instrumentation/HUD/HUD.hxx>
  95 #include <Environment/precipitation_mgr.hxx>
  96
  97 #include <Include/general.hxx>
  98 #include "splash.hxx"
  99 #include "renderer.hxx"
 100 #include "main.hxx"
 101 #include "CameraGroup.hxx"
 102 #include "FGEventHandler.hxx"
 103 #include <Main/viewer.hxx>
 104
 105 using namespace osg;
 106 using namespace simgear;
 107 using namespace flightgear;
 108
 109 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 110 public:
 111   FGHintUpdateCallback(const char* configNode) :
 112     mConfigNode(fgGetNode(configNode, true))
 113   { }
 114   virtual void operator()(osg::StateAttribute* stateAttribute,
 115                           osg::NodeVisitor*)
 116   {
 117     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 118     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 119
 120     const char* value = mConfigNode->getStringValue();
 121     if (!value)
 122       hint->setMode(GL_DONT_CARE);
 123     else if (0 == strcmp(value, "nicest"))
 124       hint->setMode(GL_NICEST);
 125     else if (0 == strcmp(value, "fastest"))
 126       hint->setMode(GL_FASTEST);
 127     else
 128       hint->setMode(GL_DONT_CARE);
 129   }
 130 private:
 131   SGSharedPtr<SGPropertyNode> mConfigNode;
 132 };
 133
 134
 135 class SGPuDrawable : public osg::Drawable {
 136 public:
 137   SGPuDrawable()
 138   {
 139     // Dynamic stuff, do not store geometry
 140     setUseDisplayList(false);
 141
 142     osg::StateSet* stateSet = getOrCreateStateSet();
 143     stateSet->setRenderBinDetails(1001, "RenderBin");
 144     // speed optimization?
 145     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 146     // We can do translucent menus, so why not. :-)
 147     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 148     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 149     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 150
 151     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 152
 153     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 154     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 155   }
 156   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 157   { drawImplementation(*renderInfo.getState()); }
 158   void drawImplementation(osg::State& state) const
 159   {
 160     state.setActiveTextureUnit(0);
 161     state.setClientActiveTextureUnit(0);
 162
 163     state.disableAllVertexArrays();
 164
 165     glPushAttrib(GL_ALL_ATTRIB_BITS);
 166     glPushClientAttrib(~0u);
 167
 168     puDisplay();
 169
 170     glPopClientAttrib();
 171     glPopAttrib();
 172   }
 173
 174   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 175   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 176
 177 private:
 178 };
 179
 180 class SGHUDAndPanelDrawable : public osg::Drawable {
 181 public:
 182   SGHUDAndPanelDrawable()
 183   {
 184     // Dynamic stuff, do not store geometry
 185     setUseDisplayList(false);
 186
 187     osg::StateSet* stateSet = getOrCreateStateSet();
 188     stateSet->setRenderBinDetails(1000, "RenderBin");
 189
 190     // speed optimization?
 191     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 192     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 193     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 194     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 195     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 196
 197     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 198   }
 199   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 200   { drawImplementation(*renderInfo.getState()); }
 201   void drawImplementation(osg::State& state) const
 202   {
 203     state.setActiveTextureUnit(0);
 204     state.setClientActiveTextureUnit(0);
 205     state.disableAllVertexArrays();
 206
 207     glPushAttrib(GL_ALL_ATTRIB_BITS);
 208     glPushClientAttrib(~0u);
 209
 210     fgCockpitUpdate(&state);
 211
 212     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 213     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 214     hud->draw(state);
 215
 216     // update the panel subsystem
 217     if ( globals->get_current_panel() != NULL )
 218         globals->get_current_panel()->update(state);
 219     // We don't need a state here - can be safely removed when we can pick
 220     // correctly
 221     fgUpdate3DPanels();
 222
 223     glPopClientAttrib();
 224     glPopAttrib();
 225
 226   }
 227
 228   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 229   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 230
 231 private:
 232 };
 233
 234 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 235 public:
 236
 237   /**
 238    * @param isSun true if the light is the actual sun i.e., for
 239    * illuminating the moon.
 240    */
 241   FGLightSourceUpdateCallback(bool isSun = false) : _isSun(isSun) {}
 242   FGLightSourceUpdateCallback(const FGLightSourceUpdateCallback& nc,
 243                               const CopyOp& op)
 244     : NodeCallback(nc, op), _isSun(nc._isSun)
 245   {}
 246   META_Object(flightgear,FGLightSourceUpdateCallback);
 247
 248   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 249   {
 250     assert(dynamic_cast<osg::LightSource*>(node));
 251     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 252     osg::Light* light = lightSource->getLight();
 253
 254     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 255     if (_isSun) {
 256       light->setAmbient(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 257       light->setDiffuse(Vec4(1.0f, 1.0f, 1.0f, 1.0f));
 258       light->setSpecular(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 259     } else {
 260       light->setAmbient(toOsg(l->scene_ambient()));
 261       light->setDiffuse(toOsg(l->scene_diffuse()));
 262       light->setSpecular(toOsg(l->scene_specular()));
 263     }
 264     osg::Vec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 265     light->setPosition(position);
 266
 267     traverse(node, nv);
 268   }
 269 private:
 270   const bool _isSun;
 271 };
 272
 273 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 274 public:
 275   FGWireFrameModeUpdateCallback() :
 276     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 277   { }
 278   virtual void operator()(osg::StateAttribute* stateAttribute,
 279                           osg::NodeVisitor*)
 280   {
 281     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 282     osg::PolygonMode* polygonMode;
 283     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 284
 285     if (mWireframe->getBoolValue())
 286       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 287                            osg::PolygonMode::LINE);
 288     else
 289       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 290                            osg::PolygonMode::FILL);
 291   }
 292 private:
 293   SGSharedPtr<SGPropertyNode> mWireframe;
 294 };
 295
 296 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 297 public:
 298   FGLightModelUpdateCallback() :
 299     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 300   { }
 301   virtual void operator()(osg::StateAttribute* stateAttribute,
 302                           osg::NodeVisitor*)
 303   {
 304     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 305     osg::LightModel* lightModel;
 306     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 307
 308 #if 0
 309     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 310     lightModel->setAmbientIntensity(toOsg(l->scene_ambient());
 311 #else
 312     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 313 #endif
 314     lightModel->setTwoSided(true);
 315     lightModel->setLocalViewer(false);
 316
 317     if (mHighlights->getBoolValue()) {
 318       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 319     } else {
 320       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 321     }
 322   }
 323 private:
 324   SGSharedPtr<SGPropertyNode> mHighlights;
 325 };
 326
 327 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 328 public:
 329   FGFogEnableUpdateCallback() :
 330     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 331   { }
 332   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 333   {
 334     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 335       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 336     } else {
 337       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 338     }
 339   }
 340 private:
 341   SGSharedPtr<SGPropertyNode> mFogEnabled;
 342 };
 343
 344 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 345 public:
 346   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 347   {
 348     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 349     assert(dynamic_cast<osg::Fog*>(sa));
 350     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 351     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 352     fog->setMode(osg::Fog::EXP2);
 353     fog->setColor(toOsg(updateVisitor->getFogColor()));
 354     fog->setDensity(updateVisitor->getFogExp2Density());
 355   }
 356 };
 357
 358 // update callback for the switch node guarding that splash
 359 class FGScenerySwitchCallback : public osg::NodeCallback {
 360 public:
 361   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 362   {
 363     assert(dynamic_cast<osg::Switch*>(node));
 364     osg::Switch* sw = static_cast<osg::Switch*>(node);
 365
 366     double t = globals->get_sim_time_sec();
 367     bool enabled = 0 < t;
 368     sw->setValue(0, enabled);
 369     if (!enabled)
 370       return;
 371     traverse(node, nv);
 372   }
 373 };
 374
 375 // Sky structures
 376 SGSky *thesky;
 377
 378 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 379 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 380
 381 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 382
 383 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 384
 385 FGRenderer::FGRenderer()
 386 {
 387 #ifdef FG_JPEG_SERVER
 388    jpgRenderFrame = FGRenderer::update;
 389 #endif
 390    eventHandler = new FGEventHandler;
 391 }
 392
 393 FGRenderer::~FGRenderer()
 394 {
 395 #ifdef FG_JPEG_SERVER
 396    jpgRenderFrame = NULL;
 397 #endif
 398 }
 399
 400 // Initialize various GL/view parameters
 401 // XXX This should be called "preinit" or something, as it initializes
 402 // critical parts of the scene graph in addition to the splash screen.
 403 void
 404 FGRenderer::splashinit( void ) {
 405     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 406     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 407     mRealRoot->addChild(fgCreateSplashNode());
 408     mFrameStamp = viewer->getFrameStamp();
 409     // Scene doesn't seem to pass the frame stamp to the update
 410     // visitor automatically.
 411     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 412     viewer->setUpdateVisitor(mUpdateVisitor.get());
 413 }
 414
 415 void
 416 FGRenderer::init( void )
 417 {
 418     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 419     osg::initNotifyLevel();
 420
 421     // The number of polygon-offset "units" to place between layers.  In
 422     // principle, one is supposed to be enough.  In practice, I find that
 423     // my hardware/driver requires many more.
 424     osg::PolygonOffset::setUnitsMultiplier(1);
 425     osg::PolygonOffset::setFactorMultiplier(1);
 426
 427     // Go full screen if requested ...
 428     if ( fgGetBool("/sim/startup/fullscreen") )
 429         fgOSFullScreen();
 430
 431     viewer->getCamera()
 432         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 433
 434     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 435
 436     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 437
 438     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 439     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 440
 441     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 442     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 443     stateSet->setAttribute(new osg::BlendFunc);
 444     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 445
 446     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 447
 448     // this will be set below
 449     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 450
 451     osg::Material* material = new osg::Material;
 452     stateSet->setAttribute(material);
 453
 454     stateSet->setTextureAttribute(0, new osg::TexEnv);
 455     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 456
 457     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 458     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 459     stateSet->setAttribute(hint);
 460     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 461     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 462     stateSet->setAttribute(hint);
 463     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 464     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 465     stateSet->setAttribute(hint);
 466     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 467     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 468     stateSet->setAttribute(hint);
 469     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 470     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 471     stateSet->setAttribute(hint);
 472
 473     osg::Group* sceneGroup = new osg::Group;
 474     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 475     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 476
 477     //sceneGroup->addChild(thesky->getCloudRoot());
 478
 479     stateSet = sceneGroup->getOrCreateStateSet();
 480     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 481
 482     // need to update the light on every frame
 483     // OSG LightSource objects are rather confusing. OSG only supports
 484     // the 10 lights specified by OpenGL itself; if more than one
 485     // LightSource in the scene graph have the same light number, it's
 486     // indeterminate which values will be used to render geometry that
 487     // has that light number enabled. Also, adding children to a
 488     // LightSource is just a shortcut for setting up a state set that
 489     // has the corresponding OpenGL light enabled: a LightSource will
 490     // affect geometry anywhere in the scene graph that has its light
 491     // number enabled in a state set.
 492     LightSource* lightSource = new LightSource;
 493     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
 494     // relative because of CameraView being just a clever transform node
 495     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 496     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 497     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 498     mRealRoot->addChild(lightSource);
 499     // we need a white diffuse light for the phase of the moon
 500     osg::LightSource* sunLight = new osg::LightSource;
 501     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
 502     sunLight->getLight()->setLightNum(1);
 503     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
 504     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 505     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
 506     // Hang a StateSet above the sky subgraph in order to turn off
 507     // light 0
 508     Group* skyGroup = new Group;
 509     StateSet* skySS = skyGroup->getOrCreateStateSet();
 510     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
 511     skyGroup->addChild(thesky->getPreRoot());
 512     sunLight->addChild(skyGroup);
 513     mRoot->addChild(sceneGroup);
 514     mRoot->addChild(sunLight);
 515     // Clouds are added to the scene graph later
 516     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 517     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 518     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 519     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 520
 521     // enable disable specular highlights.
 522     // is the place where we might plug in an other fragment shader ...
 523     osg::LightModel* lightModel = new osg::LightModel;
 524     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 525     stateSet->setAttribute(lightModel);
 526
 527     // switch to enable wireframe
 528     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 529     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 530     stateSet->setAttributeAndModes(polygonMode);
 531
 532     // scene fog handling
 533     osg::Fog* fog = new osg::Fog;
 534     fog->setUpdateCallback(new FGFogUpdateCallback);
 535     stateSet->setAttributeAndModes(fog);
 536     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 537
 538     // plug in the GUI
 539     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
 540     if (guiCamera) {
 541         osg::Geode* geode = new osg::Geode;
 542         geode->addDrawable(new SGPuDrawable);
 543         geode->addDrawable(new SGHUDAndPanelDrawable);
 544         guiCamera->addChild(geode);
 545     }
 546     osg::Switch* sw = new osg::Switch;
 547     sw->setUpdateCallback(new FGScenerySwitchCallback);
 548     sw->addChild(mRoot.get());
 549     mRealRoot->addChild(sw);
 550     // The clouds are attached directly to the scene graph root
 551     // because, in theory, they don't want the same default state set
 552     // as the rest of the scene. This may not be true in practice.
 553     mRealRoot->addChild(thesky->getCloudRoot());
 554     mRealRoot->addChild(FGCreateRedoutNode());
 555 }
 556
 557
 558 // Update all Visuals (redraws anything graphics related)
 559 void
 560 FGRenderer::update( bool refresh_camera_settings ) {
 561     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 562                           || fgGetBool("sim/sceneryloaded-override");
 563     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 564     if ( idle_state < 1000 || !scenery_loaded ) {
 565         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 566
 567         // Keep resetting sim time while the sim is initializing
 568         // the splash screen is now in the scenegraph
 569         globals->set_sim_time_sec( 0.0 );
 570         return;
 571     }
 572
 573     // Fade out the splash screen over the first three seconds.
 574     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 575     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 576
 577     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 578     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 579     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 580     bool distance_attenuation
 581         = fgGetBool("/sim/rendering/distance-attenuation");
 582     // OSGFIXME
 583     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 584                                   distance_attenuation );
 585
 586     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 587
 588     // update fog params
 589     double actual_visibility;
 590     if (fgGetBool("/environment/clouds/status")) {
 591         actual_visibility = thesky->get_visibility();
 592     } else {
 593         actual_visibility = fgGetDouble("/environment/visibility-m");
 594     }
 595
 596     // idle_state is now 1000 meaning we've finished all our
 597     // initializations and are running the main loop, so this will
 598     // now work without seg faulting the system.
 599
 600     FGViewer *current__view = globals->get_current_view();
 601     // Force update of center dependent values ...
 602     current__view->set_dirty();
 603
 604     if ( refresh_camera_settings ) {
 605         // update view port
 606         resize( fgGetInt("/sim/startup/xsize"),
 607                 fgGetInt("/sim/startup/ysize") );
 608     }
 609     osg::Camera *camera = viewer->getCamera();
 610
 611     if ( skyblend ) {
 612
 613         if ( fgGetBool("/sim/rendering/textures") ) {
 614             SGVec4f clearColor(l->adj_fog_color());
 615             camera->setClearColor(toOsg(clearColor));
 616         }
 617     } else {
 618         SGVec4f clearColor(l->sky_color());
 619         camera->setClearColor(toOsg(clearColor));
 620     }
 621
 622     // update fog params if visibility has changed
 623     double visibility_meters = fgGetDouble("/environment/visibility-m");
 624     thesky->set_visibility(visibility_meters);
 625
 626     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 627                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 628                         / (double)fgGetInt("/sim/model-hz") );
 629
 630     // update the sky dome
 631     if ( skyblend ) {
 632
 633         // The sun and moon distances are scaled down versions
 634         // of the actual distance to get both the moon and the sun
 635         // within the range of the far clip plane.
 636         // Moon distance:    384,467 kilometers
 637         // Sun distance: 150,000,000 kilometers
 638
 639         double sun_horiz_eff, moon_horiz_eff;
 640         if (fgGetBool("/sim/rendering/horizon-effect")) {
 641             sun_horiz_eff
 642                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
 643                                              0.0),
 644                              0.33) / 3.0;
 645             moon_horiz_eff
 646                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
 647                                              0.0),
 648                              0.33)/3.0;
 649         } else {
 650            sun_horiz_eff = moon_horiz_eff = 1.0;
 651         }
 652
 653         SGSkyState sstate;
 654         sstate.pos       = current__view->getViewPosition();
 655         sstate.pos_geod  = current__view->getPosition();
 656         sstate.ori       = current__view->getViewOrientation();
 657         sstate.spin      = l->get_sun_rotation();
 658         sstate.gst       = globals->get_time_params()->getGst();
 659         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 660         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 661         sstate.sun_angle = l->get_sun_angle();
 662
 663         SGSkyColor scolor;
 664         scolor.sky_color   = SGVec3f(l->sky_color().data());
 665         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
 666         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 667         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 668         scolor.sun_angle   = l->get_sun_angle();
 669         scolor.moon_angle  = l->get_moon_angle();
 670
 671         thesky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
 672         thesky->repaint( scolor, *globals->get_ephem() );
 673
 674         /*
 675         SG_LOG( SG_GENERAL, SG_BULK,
 676                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 677          << view_pos[1] << " " << view_pos[2] );
 678         SG_LOG( SG_GENERAL, SG_BULK,
 679                 "    zero_elev = " << zero_elev[0] << " "
 680          << zero_elev[1] << " " << zero_elev[2]
 681          << " lon = " << cur_fdm_state->get_Longitude()
 682          << " lat = " << cur_fdm_state->get_Latitude() );
 683         SG_LOG( SG_GENERAL, SG_BULK,
 684                 "    sun_rot = " << l->get_sun_rotation
 685          << " gst = " << SGTime::cur_time_params->getGst() );
 686         SG_LOG( SG_GENERAL, SG_BULK,
 687              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 688           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 689           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 690           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 691         */
 692
 693         //OSGFIXME
 694 //         shadows->setupShadows(
 695 //           current__view->getLongitude_deg(),
 696 //           current__view->getLatitude_deg(),
 697 //           globals->get_time_params()->getGst(),
 698 //           globals->get_ephem()->getSunRightAscension(),
 699 //           globals->get_ephem()->getSunDeclination(),
 700 //           l->get_sun_angle());
 701
 702     }
 703
 704 //     sgEnviro.setLight(l->adj_fog_color());
 705 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 706 //         current__view->get_world_up(),
 707 //         current__view->getLongitude_deg(),
 708 //         current__view->getLatitude_deg(),
 709 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 710 //         delta_time_sec);
 711
 712     // OSGFIXME
 713 //     sgEnviro.drawLightning();
 714
 715 //        double current_view_origin_airspeed_horiz_kt =
 716 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 717 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 718 //                                * SGD_DEGREES_TO_RADIANS);
 719
 720     // OSGFIXME
 721 //     if( is_internal )
 722 //         shadows->endOfFrame();
 723
 724     // need to call the update visitor once
 725     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 726     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 727                                 current__view->getViewOrientation());
 728     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 729     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 730                              l->scene_diffuse(), l->scene_specular(),
 731                              l->adj_fog_color(),
 732                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 733     mUpdateVisitor->setVisibility(actual_visibility);
 734     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 735     bool hotspots = fgGetBool("/sim/panel-hotspots");
 736     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 737     cullMask |= simgear::GroundLightManager::instance()
 738         ->getLightNodeMask(mUpdateVisitor.get());
 739     if (hotspots)
 740         cullMask |= simgear::PICK_BIT;
 741     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
 742 }
 743
 744
 745
 746 // options.cxx needs to see this for toggle_panel()
 747 // Handle new window size or exposure
 748 void
 749 FGRenderer::resize( int width, int height ) {
 750     int view_h;
 751
 752     if ( (!fgGetBool("/sim/virtual-cockpit"))
 753          && fgPanelVisible() && idle_state == 1000 ) {
 754         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 755                              globals->get_current_panel()->getYOffset()) / 768.0);
 756     } else {
 757         view_h = height;
 758     }
 759
 760     static int lastwidth = 0;
 761     static int lastheight = 0;
 762     if (width != lastwidth)
 763         fgSetInt("/sim/startup/xsize", lastwidth = width);
 764     if (height != lastheight)
 765         fgSetInt("/sim/startup/ysize", lastheight = height);
 766
 767     // for all views
 768     FGViewMgr *viewmgr = globals->get_viewmgr();
 769     if (viewmgr) {
 770       for ( int i = 0; i < viewmgr->size(); ++i ) {
 771         viewmgr->get_view(i)->
 772           set_aspect_ratio((float)view_h / (float)width);
 773       }
 774     }
 775 }
 776
 777 bool
 778 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 779                  const osgGA::GUIEventAdapter* ea)
 780 {
 781     // wipe out the return ...
 782     pickList.clear();
 783     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 784     Intersections intersections;
 785
 786     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 787         return false;
 788     for (Intersections::iterator hit = intersections.begin(),
 789              e = intersections.end();
 790          hit != e;
 791          ++hit) {
 792         const osg::NodePath& np = hit->nodePath;
 793         osg::NodePath::const_reverse_iterator npi;
 794         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 795             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 796             if (!ud)
 797                 continue;
 798             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 799                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 800                 if (!pickCallback)
 801                     continue;
 802                 SGSceneryPick sceneryPick;
 803                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
 804                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
 805                 sceneryPick.callback = pickCallback;
 806                 pickList.push_back(sceneryPick);
 807             }
 808         }
 809     }
 810     return !pickList.empty();
 811 }
 812
 813 void
 814 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
 815 {
 816     viewer = viewer_;
 817 }
 818
 819 void
 820 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
 821 {
 822     eventHandler = eventHandler_;
 823 }
 824
 825 void
 826 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 827 {
 828     mRealRoot->addChild(camera);
 829 }
 830
 831 bool
 832 fgDumpSceneGraphToFile(const char* filename)
 833 {
 834     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 835 }
 836
 837 bool
 838 fgDumpTerrainBranchToFile(const char* filename)
 839 {
 840     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 841                                  filename );
 842 }
 843
 844 // For debugging
 845 bool
 846 fgDumpNodeToFile(osg::Node* node, const char* filename)
 847 {
 848     return osgDB::writeNodeFile(*node, filename);
 849 }
 850 // end of renderer.cxx
 851