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/Program>
  51 #include <osg/Version>
  52 #include <osg/TexEnv>
  53
  54 #include <osgUtil/LineSegmentIntersector>
  55
  56 #include <osg/io_utils>
  57 #include <osgDB/WriteFile>
  58
  59 #include <simgear/math/SGMath.hxx>
  60 #include <simgear/screen/extensions.hxx>
  61 #include <simgear/scene/material/matlib.hxx>
  62 #include <simgear/scene/model/animation.hxx>
  63 #include <simgear/scene/model/placement.hxx>
  64 #include <simgear/scene/sky/sky.hxx>
  65 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  66 #include <simgear/scene/util/RenderConstants.hxx>
  67 #include <simgear/scene/util/SGSceneUserData.hxx>
  68 #include <simgear/scene/tgdb/GroundLightManager.hxx>
  69 #include <simgear/scene/tgdb/pt_lights.hxx>
  70 #include <simgear/structure/OSGUtils.hxx>
  71 #include <simgear/props/props.hxx>
  72 #include <simgear/timing/sg_time.hxx>
  73 #include <simgear/ephemeris/ephemeris.hxx>
  74 #include <simgear/math/sg_random.h>
  75 #ifdef FG_JPEG_SERVER
  76 #include <simgear/screen/jpgfactory.hxx>
  77 #endif
  78
  79 #include <simgear/environment/visual_enviro.hxx>
  80
  81 #include <Time/light.hxx>
  82 #include <Time/light.hxx>
  83 #include <Aircraft/aircraft.hxx>
  84 #include <Cockpit/panel.hxx>
  85 #include <Cockpit/cockpit.hxx>
  86 #include <Cockpit/hud.hxx>
  87 #include <Model/panelnode.hxx>
  88 #include <Model/modelmgr.hxx>
  89 #include <Model/acmodel.hxx>
  90 #include <Scenery/scenery.hxx>
  91 #include <Scenery/redout.hxx>
  92 #include <Scenery/tilemgr.hxx>
  93 #include <GUI/new_gui.hxx>
  94 #include <Instrumentation/instrument_mgr.hxx>
  95 #include <Instrumentation/HUD/HUD.hxx>
  96 #include <Environment/precipitation_mgr.hxx>
  97
  98 #include <Include/general.hxx>
  99 #include "splash.hxx"
 100 #include "renderer.hxx"
 101 #include "main.hxx"
 102 #include "CameraGroup.hxx"
 103 #include "FGEventHandler.hxx"
 104 #include <Main/viewer.hxx>
 105
 106 using namespace osg;
 107 using namespace simgear;
 108 using namespace flightgear;
 109
 110 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 111 public:
 112   FGHintUpdateCallback(const char* configNode) :
 113     mConfigNode(fgGetNode(configNode, true))
 114   { }
 115   virtual void operator()(osg::StateAttribute* stateAttribute,
 116                           osg::NodeVisitor*)
 117   {
 118     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 119     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 120
 121     const char* value = mConfigNode->getStringValue();
 122     if (!value)
 123       hint->setMode(GL_DONT_CARE);
 124     else if (0 == strcmp(value, "nicest"))
 125       hint->setMode(GL_NICEST);
 126     else if (0 == strcmp(value, "fastest"))
 127       hint->setMode(GL_FASTEST);
 128     else
 129       hint->setMode(GL_DONT_CARE);
 130   }
 131 private:
 132   SGSharedPtr<SGPropertyNode> mConfigNode;
 133 };
 134
 135
 136 class SGPuDrawable : public osg::Drawable {
 137 public:
 138   SGPuDrawable()
 139   {
 140     // Dynamic stuff, do not store geometry
 141     setUseDisplayList(false);
 142     setDataVariance(Object::DYNAMIC);
 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     setDataVariance(Object::DYNAMIC);
 189
 190     osg::StateSet* stateSet = getOrCreateStateSet();
 191     stateSet->setRenderBinDetails(1000, "RenderBin");
 192
 193     // speed optimization?
 194     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 195     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 196     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 197     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 198     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 199
 200     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 201   }
 202   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 203   { drawImplementation(*renderInfo.getState()); }
 204   void drawImplementation(osg::State& state) const
 205   {
 206     state.setActiveTextureUnit(0);
 207     state.setClientActiveTextureUnit(0);
 208     state.disableAllVertexArrays();
 209
 210     glPushAttrib(GL_ALL_ATTRIB_BITS);
 211     glPushClientAttrib(~0u);
 212
 213     fgCockpitUpdate(&state);
 214
 215     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 216     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 217     hud->draw(state);
 218
 219     // update the panel subsystem
 220     if ( globals->get_current_panel() != NULL )
 221         globals->get_current_panel()->update(state);
 222     // We don't need a state here - can be safely removed when we can pick
 223     // correctly
 224     fgUpdate3DPanels();
 225
 226     glPopClientAttrib();
 227     glPopAttrib();
 228
 229   }
 230
 231   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 232   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 233
 234 private:
 235 };
 236
 237 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 238 public:
 239
 240   /**
 241    * @param isSun true if the light is the actual sun i.e., for
 242    * illuminating the moon.
 243    */
 244   FGLightSourceUpdateCallback(bool isSun = false) : _isSun(isSun) {}
 245   FGLightSourceUpdateCallback(const FGLightSourceUpdateCallback& nc,
 246                               const CopyOp& op)
 247     : NodeCallback(nc, op), _isSun(nc._isSun)
 248   {}
 249   META_Object(flightgear,FGLightSourceUpdateCallback);
 250
 251   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 252   {
 253     assert(dynamic_cast<osg::LightSource*>(node));
 254     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 255     osg::Light* light = lightSource->getLight();
 256
 257     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 258     if (_isSun) {
 259       light->setAmbient(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 260       light->setDiffuse(Vec4(1.0f, 1.0f, 1.0f, 1.0f));
 261       light->setSpecular(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 262     } else {
 263       light->setAmbient(toOsg(l->scene_ambient()));
 264       light->setDiffuse(toOsg(l->scene_diffuse()));
 265       light->setSpecular(toOsg(l->scene_specular()));
 266     }
 267     osg::Vec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 268     light->setPosition(position);
 269
 270     traverse(node, nv);
 271   }
 272 private:
 273   const bool _isSun;
 274 };
 275
 276 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 277 public:
 278   FGWireFrameModeUpdateCallback() :
 279     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 280   { }
 281   virtual void operator()(osg::StateAttribute* stateAttribute,
 282                           osg::NodeVisitor*)
 283   {
 284     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 285     osg::PolygonMode* polygonMode;
 286     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 287
 288     if (mWireframe->getBoolValue())
 289       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 290                            osg::PolygonMode::LINE);
 291     else
 292       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 293                            osg::PolygonMode::FILL);
 294   }
 295 private:
 296   SGSharedPtr<SGPropertyNode> mWireframe;
 297 };
 298
 299 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 300 public:
 301   FGLightModelUpdateCallback() :
 302     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 303   { }
 304   virtual void operator()(osg::StateAttribute* stateAttribute,
 305                           osg::NodeVisitor*)
 306   {
 307     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 308     osg::LightModel* lightModel;
 309     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 310
 311 #if 0
 312     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 313     lightModel->setAmbientIntensity(toOsg(l->scene_ambient());
 314 #else
 315     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 316 #endif
 317     lightModel->setTwoSided(true);
 318     lightModel->setLocalViewer(false);
 319
 320     if (mHighlights->getBoolValue()) {
 321       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 322     } else {
 323       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 324     }
 325   }
 326 private:
 327   SGSharedPtr<SGPropertyNode> mHighlights;
 328 };
 329
 330 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 331 public:
 332   FGFogEnableUpdateCallback() :
 333     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 334   { }
 335   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 336   {
 337     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 338       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 339     } else {
 340       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 341     }
 342   }
 343 private:
 344   SGSharedPtr<SGPropertyNode> mFogEnabled;
 345 };
 346
 347 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 348 public:
 349   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 350   {
 351     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 352     assert(dynamic_cast<osg::Fog*>(sa));
 353     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 354     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 355     fog->setMode(osg::Fog::EXP2);
 356     fog->setColor(toOsg(updateVisitor->getFogColor()));
 357     fog->setDensity(updateVisitor->getFogExp2Density());
 358   }
 359 };
 360
 361 // update callback for the switch node guarding that splash
 362 class FGScenerySwitchCallback : public osg::NodeCallback {
 363 public:
 364   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 365   {
 366     assert(dynamic_cast<osg::Switch*>(node));
 367     osg::Switch* sw = static_cast<osg::Switch*>(node);
 368
 369     double t = globals->get_sim_time_sec();
 370     bool enabled = 0 < t;
 371     sw->setValue(0, enabled);
 372     if (!enabled)
 373       return;
 374     traverse(node, nv);
 375   }
 376 };
 377
 378 // Sky structures
 379 SGSky *thesky;
 380
 381 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 382 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 383
 384 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 385
 386 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 387
 388 FGRenderer::FGRenderer()
 389 {
 390 #ifdef FG_JPEG_SERVER
 391    jpgRenderFrame = FGRenderer::update;
 392 #endif
 393    eventHandler = new FGEventHandler;
 394 }
 395
 396 FGRenderer::~FGRenderer()
 397 {
 398 #ifdef FG_JPEG_SERVER
 399    jpgRenderFrame = NULL;
 400 #endif
 401 }
 402
 403 // Initialize various GL/view parameters
 404 // XXX This should be called "preinit" or something, as it initializes
 405 // critical parts of the scene graph in addition to the splash screen.
 406 void
 407 FGRenderer::splashinit( void ) {
 408     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 409     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 410     mRealRoot->addChild(fgCreateSplashNode());
 411     mFrameStamp = viewer->getFrameStamp();
 412     // Scene doesn't seem to pass the frame stamp to the update
 413     // visitor automatically.
 414     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 415     viewer->setUpdateVisitor(mUpdateVisitor.get());
 416 }
 417
 418 void
 419 FGRenderer::init( void )
 420 {
 421     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 422     osg::initNotifyLevel();
 423
 424     // The number of polygon-offset "units" to place between layers.  In
 425     // principle, one is supposed to be enough.  In practice, I find that
 426     // my hardware/driver requires many more.
 427     osg::PolygonOffset::setUnitsMultiplier(1);
 428     osg::PolygonOffset::setFactorMultiplier(1);
 429
 430     // Go full screen if requested ...
 431     if ( fgGetBool("/sim/startup/fullscreen") )
 432         fgOSFullScreen();
 433
 434     viewer->getCamera()
 435         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 436
 437     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 438
 439     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 440
 441     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 442     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 443
 444     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 445     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 446     stateSet->setAttribute(new osg::BlendFunc);
 447     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 448
 449     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 450
 451     // this will be set below
 452     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 453
 454     osg::Material* material = new osg::Material;
 455     stateSet->setAttribute(material);
 456
 457     stateSet->setTextureAttribute(0, new osg::TexEnv);
 458     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 459
 460     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 461     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 462     stateSet->setAttribute(hint);
 463     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 464     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 465     stateSet->setAttribute(hint);
 466     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 467     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 468     stateSet->setAttribute(hint);
 469     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 470     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 471     stateSet->setAttribute(hint);
 472     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 473     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 474     stateSet->setAttribute(hint);
 475
 476     osg::Group* sceneGroup = new osg::Group;
 477     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 478     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 479
 480     //sceneGroup->addChild(thesky->getCloudRoot());
 481
 482     stateSet = sceneGroup->getOrCreateStateSet();
 483     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 484
 485     // need to update the light on every frame
 486     // OSG LightSource objects are rather confusing. OSG only supports
 487     // the 10 lights specified by OpenGL itself; if more than one
 488     // LightSource in the scene graph have the same light number, it's
 489     // indeterminate which values will be used to render geometry that
 490     // has that light number enabled. Also, adding children to a
 491     // LightSource is just a shortcut for setting up a state set that
 492     // has the corresponding OpenGL light enabled: a LightSource will
 493     // affect geometry anywhere in the scene graph that has its light
 494     // number enabled in a state set.
 495     LightSource* lightSource = new LightSource;
 496     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
 497     // relative because of CameraView being just a clever transform node
 498     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 499     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 500     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 501     mRealRoot->addChild(lightSource);
 502     // we need a white diffuse light for the phase of the moon
 503     osg::LightSource* sunLight = new osg::LightSource;
 504     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
 505     sunLight->getLight()->setLightNum(1);
 506     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
 507     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 508     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
 509     // Hang a StateSet above the sky subgraph in order to turn off
 510     // light 0
 511     Group* skyGroup = new Group;
 512     StateSet* skySS = skyGroup->getOrCreateStateSet();
 513     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
 514     skyGroup->addChild(thesky->getPreRoot());
 515     sunLight->addChild(skyGroup);
 516     mRoot->addChild(sceneGroup);
 517     mRoot->addChild(sunLight);
 518     // Clouds are added to the scene graph later
 519     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 520     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 521     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 522     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 523
 524     // enable disable specular highlights.
 525     // is the place where we might plug in an other fragment shader ...
 526     osg::LightModel* lightModel = new osg::LightModel;
 527     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 528     stateSet->setAttribute(lightModel);
 529
 530     // switch to enable wireframe
 531     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 532     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 533     stateSet->setAttributeAndModes(polygonMode);
 534
 535     // scene fog handling
 536     osg::Fog* fog = new osg::Fog;
 537     fog->setUpdateCallback(new FGFogUpdateCallback);
 538     stateSet->setAttributeAndModes(fog);
 539     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 540
 541     // plug in the GUI
 542     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
 543     if (guiCamera) {
 544         osg::Geode* geode = new osg::Geode;
 545         geode->addDrawable(new SGPuDrawable);
 546         geode->addDrawable(new SGHUDAndPanelDrawable);
 547         guiCamera->addChild(geode);
 548     }
 549     osg::Switch* sw = new osg::Switch;
 550     sw->setUpdateCallback(new FGScenerySwitchCallback);
 551     sw->addChild(mRoot.get());
 552     mRealRoot->addChild(sw);
 553     // The clouds are attached directly to the scene graph root
 554     // because, in theory, they don't want the same default state set
 555     // as the rest of the scene. This may not be true in practice.
 556     mRealRoot->addChild(thesky->getCloudRoot());
 557     mRealRoot->addChild(FGCreateRedoutNode());
 558     // Attach empty program to the scene root so that shader programs
 559     // don't leak into state sets (effects) that shouldn't have one.
 560     stateSet = mRealRoot->getOrCreateStateSet();
 561     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
 562 }
 563
 564
 565 // Update all Visuals (redraws anything graphics related)
 566 void
 567 FGRenderer::update( bool refresh_camera_settings ) {
 568     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 569                           || fgGetBool("sim/sceneryloaded-override");
 570     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 571     if ( idle_state < 1000 || !scenery_loaded ) {
 572         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 573
 574         // Keep resetting sim time while the sim is initializing
 575         // the splash screen is now in the scenegraph
 576         globals->set_sim_time_sec( 0.0 );
 577         return;
 578     }
 579
 580     // Fade out the splash screen over the first three seconds.
 581     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 582     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 583
 584     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 585     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 586     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 587     bool distance_attenuation
 588         = fgGetBool("/sim/rendering/distance-attenuation");
 589     // OSGFIXME
 590     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 591                                   distance_attenuation );
 592
 593     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 594
 595     // update fog params
 596     double actual_visibility;
 597     if (fgGetBool("/environment/clouds/status")) {
 598         actual_visibility = thesky->get_visibility();
 599     } else {
 600         actual_visibility = fgGetDouble("/environment/visibility-m");
 601     }
 602
 603     // idle_state is now 1000 meaning we've finished all our
 604     // initializations and are running the main loop, so this will
 605     // now work without seg faulting the system.
 606
 607     FGViewer *current__view = globals->get_current_view();
 608     // Force update of center dependent values ...
 609     current__view->set_dirty();
 610
 611     if ( refresh_camera_settings ) {
 612         // update view port
 613         resize( fgGetInt("/sim/startup/xsize"),
 614                 fgGetInt("/sim/startup/ysize") );
 615     }
 616     osg::Camera *camera = viewer->getCamera();
 617
 618     if ( skyblend ) {
 619
 620         if ( fgGetBool("/sim/rendering/textures") ) {
 621             SGVec4f clearColor(l->adj_fog_color());
 622             camera->setClearColor(toOsg(clearColor));
 623         }
 624     } else {
 625         SGVec4f clearColor(l->sky_color());
 626         camera->setClearColor(toOsg(clearColor));
 627     }
 628
 629     // update fog params if visibility has changed
 630     double visibility_meters = fgGetDouble("/environment/visibility-m");
 631     thesky->set_visibility(visibility_meters);
 632
 633     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 634                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 635                         / (double)fgGetInt("/sim/model-hz") );
 636
 637     // update the sky dome
 638     if ( skyblend ) {
 639
 640         // The sun and moon distances are scaled down versions
 641         // of the actual distance to get both the moon and the sun
 642         // within the range of the far clip plane.
 643         // Moon distance:    384,467 kilometers
 644         // Sun distance: 150,000,000 kilometers
 645
 646         double sun_horiz_eff, moon_horiz_eff;
 647         if (fgGetBool("/sim/rendering/horizon-effect")) {
 648             sun_horiz_eff
 649                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
 650                                              0.0),
 651                              0.33) / 3.0;
 652             moon_horiz_eff
 653                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
 654                                              0.0),
 655                              0.33)/3.0;
 656         } else {
 657            sun_horiz_eff = moon_horiz_eff = 1.0;
 658         }
 659
 660         SGSkyState sstate;
 661         sstate.pos       = current__view->getViewPosition();
 662         sstate.pos_geod  = current__view->getPosition();
 663         sstate.ori       = current__view->getViewOrientation();
 664         sstate.spin      = l->get_sun_rotation();
 665         sstate.gst       = globals->get_time_params()->getGst();
 666         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 667         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 668         sstate.sun_angle = l->get_sun_angle();
 669
 670         SGSkyColor scolor;
 671         scolor.sky_color   = SGVec3f(l->sky_color().data());
 672         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
 673         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 674         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 675         scolor.sun_angle   = l->get_sun_angle();
 676         scolor.moon_angle  = l->get_moon_angle();
 677
 678         thesky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
 679         thesky->repaint( scolor, *globals->get_ephem() );
 680
 681         /*
 682         SG_LOG( SG_GENERAL, SG_BULK,
 683                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 684          << view_pos[1] << " " << view_pos[2] );
 685         SG_LOG( SG_GENERAL, SG_BULK,
 686                 "    zero_elev = " << zero_elev[0] << " "
 687          << zero_elev[1] << " " << zero_elev[2]
 688          << " lon = " << cur_fdm_state->get_Longitude()
 689          << " lat = " << cur_fdm_state->get_Latitude() );
 690         SG_LOG( SG_GENERAL, SG_BULK,
 691                 "    sun_rot = " << l->get_sun_rotation
 692          << " gst = " << SGTime::cur_time_params->getGst() );
 693         SG_LOG( SG_GENERAL, SG_BULK,
 694              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 695           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 696           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 697           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 698         */
 699
 700         //OSGFIXME
 701 //         shadows->setupShadows(
 702 //           current__view->getLongitude_deg(),
 703 //           current__view->getLatitude_deg(),
 704 //           globals->get_time_params()->getGst(),
 705 //           globals->get_ephem()->getSunRightAscension(),
 706 //           globals->get_ephem()->getSunDeclination(),
 707 //           l->get_sun_angle());
 708
 709     }
 710
 711 //     sgEnviro.setLight(l->adj_fog_color());
 712 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 713 //         current__view->get_world_up(),
 714 //         current__view->getLongitude_deg(),
 715 //         current__view->getLatitude_deg(),
 716 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 717 //         delta_time_sec);
 718
 719     // OSGFIXME
 720 //     sgEnviro.drawLightning();
 721
 722 //        double current_view_origin_airspeed_horiz_kt =
 723 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 724 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 725 //                                * SGD_DEGREES_TO_RADIANS);
 726
 727     // OSGFIXME
 728 //     if( is_internal )
 729 //         shadows->endOfFrame();
 730
 731     // need to call the update visitor once
 732     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 733     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 734                                 current__view->getViewOrientation());
 735     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 736     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 737                              l->scene_diffuse(), l->scene_specular(),
 738                              l->adj_fog_color(),
 739                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 740     mUpdateVisitor->setVisibility(actual_visibility);
 741     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 742     bool hotspots = fgGetBool("/sim/panel-hotspots");
 743     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 744     cullMask |= simgear::GroundLightManager::instance()
 745         ->getLightNodeMask(mUpdateVisitor.get());
 746     if (hotspots)
 747         cullMask |= simgear::PICK_BIT;
 748     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
 749 }
 750
 751
 752
 753 // options.cxx needs to see this for toggle_panel()
 754 // Handle new window size or exposure
 755 void
 756 FGRenderer::resize( int width, int height ) {
 757     int view_h;
 758
 759     if ( (!fgGetBool("/sim/virtual-cockpit"))
 760          && fgPanelVisible() && idle_state == 1000 ) {
 761         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 762                              globals->get_current_panel()->getYOffset()) / 768.0);
 763     } else {
 764         view_h = height;
 765     }
 766
 767     static int lastwidth = 0;
 768     static int lastheight = 0;
 769     if (width != lastwidth)
 770         fgSetInt("/sim/startup/xsize", lastwidth = width);
 771     if (height != lastheight)
 772         fgSetInt("/sim/startup/ysize", lastheight = height);
 773
 774     // for all views
 775     FGViewMgr *viewmgr = globals->get_viewmgr();
 776     if (viewmgr) {
 777       for ( int i = 0; i < viewmgr->size(); ++i ) {
 778         viewmgr->get_view(i)->
 779           set_aspect_ratio((float)view_h / (float)width);
 780       }
 781     }
 782 }
 783
 784 bool
 785 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 786                  const osgGA::GUIEventAdapter* ea)
 787 {
 788     // wipe out the return ...
 789     pickList.clear();
 790     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 791     Intersections intersections;
 792
 793     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 794         return false;
 795     for (Intersections::iterator hit = intersections.begin(),
 796              e = intersections.end();
 797          hit != e;
 798          ++hit) {
 799         const osg::NodePath& np = hit->nodePath;
 800         osg::NodePath::const_reverse_iterator npi;
 801         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 802             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 803             if (!ud)
 804                 continue;
 805             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 806                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 807                 if (!pickCallback)
 808                     continue;
 809                 SGSceneryPick sceneryPick;
 810                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
 811                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
 812                 sceneryPick.callback = pickCallback;
 813                 pickList.push_back(sceneryPick);
 814             }
 815         }
 816     }
 817     return !pickList.empty();
 818 }
 819
 820 void
 821 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
 822 {
 823     viewer = viewer_;
 824 }
 825
 826 void
 827 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
 828 {
 829     eventHandler = eventHandler_;
 830 }
 831
 832 void
 833 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 834 {
 835     mRealRoot->addChild(camera);
 836 }
 837
 838 bool
 839 fgDumpSceneGraphToFile(const char* filename)
 840 {
 841     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 842 }
 843
 844 bool
 845 fgDumpTerrainBranchToFile(const char* filename)
 846 {
 847     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 848                                  filename );
 849 }
 850
 851 // For debugging
 852 bool
 853 fgDumpNodeToFile(osg::Node* node, const char* filename)
 854 {
 855     return osgDB::writeNodeFile(*node, filename);
 856 }
 857 // end of renderer.cxx
 858