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/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 <Cockpit/panel.hxx>
  83 #include <Cockpit/cockpit.hxx>
  84 #include <Cockpit/hud.hxx>
  85 #include <Model/panelnode.hxx>
  86 #include <Model/modelmgr.hxx>
  87 #include <Model/acmodel.hxx>
  88 #include <Scenery/scenery.hxx>
  89 #include <Scenery/redout.hxx>
  90 #include <Scenery/tilemgr.hxx>
  91 #include <GUI/new_gui.hxx>
  92 #include <Instrumentation/instrument_mgr.hxx>
  93 #include <Instrumentation/HUD/HUD.hxx>
  94 #include <Environment/precipitation_mgr.hxx>
  95
  96 #include "splash.hxx"
  97 #include "renderer.hxx"
  98 #include "main.hxx"
  99 #include "CameraGroup.hxx"
 100 #include "FGEventHandler.hxx"
 101 #include <Main/viewer.hxx>
 102
 103 using namespace osg;
 104 using namespace simgear;
 105 using namespace flightgear;
 106
 107 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 108 public:
 109   FGHintUpdateCallback(const char* configNode) :
 110     mConfigNode(fgGetNode(configNode, true))
 111   { }
 112   virtual void operator()(osg::StateAttribute* stateAttribute,
 113                           osg::NodeVisitor*)
 114   {
 115     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 116     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 117
 118     const char* value = mConfigNode->getStringValue();
 119     if (!value)
 120       hint->setMode(GL_DONT_CARE);
 121     else if (0 == strcmp(value, "nicest"))
 122       hint->setMode(GL_NICEST);
 123     else if (0 == strcmp(value, "fastest"))
 124       hint->setMode(GL_FASTEST);
 125     else
 126       hint->setMode(GL_DONT_CARE);
 127   }
 128 private:
 129   SGSharedPtr<SGPropertyNode> mConfigNode;
 130 };
 131
 132
 133 class SGPuDrawable : public osg::Drawable {
 134 public:
 135   SGPuDrawable()
 136   {
 137     // Dynamic stuff, do not store geometry
 138     setUseDisplayList(false);
 139     setDataVariance(Object::DYNAMIC);
 140
 141     osg::StateSet* stateSet = getOrCreateStateSet();
 142     stateSet->setRenderBinDetails(1001, "RenderBin");
 143     // speed optimization?
 144     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 145     // We can do translucent menus, so why not. :-)
 146     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 147     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 148     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 149
 150     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 151
 152     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 153     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 154   }
 155   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 156   { drawImplementation(*renderInfo.getState()); }
 157   void drawImplementation(osg::State& state) const
 158   {
 159     state.setActiveTextureUnit(0);
 160     state.setClientActiveTextureUnit(0);
 161
 162     state.disableAllVertexArrays();
 163
 164     glPushAttrib(GL_ALL_ATTRIB_BITS);
 165     glPushClientAttrib(~0u);
 166
 167     puDisplay();
 168
 169     glPopClientAttrib();
 170     glPopAttrib();
 171   }
 172
 173   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 174   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 175
 176 private:
 177 };
 178
 179 class SGHUDAndPanelDrawable : public osg::Drawable {
 180 public:
 181   SGHUDAndPanelDrawable()
 182   {
 183     // Dynamic stuff, do not store geometry
 184     setUseDisplayList(false);
 185     setDataVariance(Object::DYNAMIC);
 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     // Attach empty program to the scene root so that shader programs
 556     // don't leak into state sets (effects) that shouldn't have one.
 557     stateSet = mRealRoot->getOrCreateStateSet();
 558     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
 559 }
 560
 561
 562 // Update all Visuals (redraws anything graphics related)
 563 void
 564 FGRenderer::update( bool refresh_camera_settings ) {
 565     bool scenery_loaded = fgGetBool("sim/sceneryloaded", false)
 566                           || fgGetBool("sim/sceneryloaded-override");
 567     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 568     if (!scenery_loaded) {
 569       fgSetDouble("/sim/startup/splash-alpha", 1.0);
 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     double altitude_m = fgGetDouble("/position/altitude-ft") * SG_FEET_TO_METER;
 627     thesky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
 628
 629     // update the sky dome
 630     if ( skyblend ) {
 631
 632         // The sun and moon distances are scaled down versions
 633         // of the actual distance to get both the moon and the sun
 634         // within the range of the far clip plane.
 635         // Moon distance:    384,467 kilometers
 636         // Sun distance: 150,000,000 kilometers
 637
 638         double sun_horiz_eff, moon_horiz_eff;
 639         if (fgGetBool("/sim/rendering/horizon-effect")) {
 640             sun_horiz_eff
 641                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
 642                                              0.0),
 643                              0.33) / 3.0;
 644             moon_horiz_eff
 645                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
 646                                              0.0),
 647                              0.33)/3.0;
 648         } else {
 649            sun_horiz_eff = moon_horiz_eff = 1.0;
 650         }
 651
 652         SGSkyState sstate;
 653         sstate.pos       = current__view->getViewPosition();
 654         sstate.pos_geod  = current__view->getPosition();
 655         sstate.ori       = current__view->getViewOrientation();
 656         sstate.spin      = l->get_sun_rotation();
 657         sstate.gst       = globals->get_time_params()->getGst();
 658         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 659         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 660         sstate.sun_angle = l->get_sun_angle();
 661
 662         SGSkyColor scolor;
 663         scolor.sky_color   = SGVec3f(l->sky_color().data());
 664         scolor.adj_sky_color = SGVec3f(l->adj_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
 670         double delta_time_sec = fgGetDouble("/sim/time/delta-sec");
 671         thesky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
 672         thesky->repaint( scolor, *globals->get_ephem() );
 673
 674             //OSGFIXME
 675 //         shadows->setupShadows(
 676 //           current__view->getLongitude_deg(),
 677 //           current__view->getLatitude_deg(),
 678 //           globals->get_time_params()->getGst(),
 679 //           globals->get_ephem()->getSunRightAscension(),
 680 //           globals->get_ephem()->getSunDeclination(),
 681 //           l->get_sun_angle());
 682
 683     }
 684
 685 //     sgEnviro.setLight(l->adj_fog_color());
 686 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 687 //         current__view->get_world_up(),
 688 //         current__view->getLongitude_deg(),
 689 //         current__view->getLatitude_deg(),
 690 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 691 //         delta_time_sec);
 692
 693     // OSGFIXME
 694 //     sgEnviro.drawLightning();
 695
 696 //        double current_view_origin_airspeed_horiz_kt =
 697 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 698 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 699 //                                * SGD_DEGREES_TO_RADIANS);
 700
 701     // OSGFIXME
 702 //     if( is_internal )
 703 //         shadows->endOfFrame();
 704
 705     // need to call the update visitor once
 706     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 707     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 708                                 current__view->getViewOrientation());
 709     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 710     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 711                              l->scene_diffuse(), l->scene_specular(),
 712                              l->adj_fog_color(),
 713                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 714     mUpdateVisitor->setVisibility(actual_visibility);
 715     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 716     bool hotspots = fgGetBool("/sim/panel-hotspots");
 717     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 718     cullMask |= simgear::GroundLightManager::instance()
 719         ->getLightNodeMask(mUpdateVisitor.get());
 720     if (hotspots)
 721         cullMask |= simgear::PICK_BIT;
 722     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
 723 }
 724
 725
 726
 727 // options.cxx needs to see this for toggle_panel()
 728 // Handle new window size or exposure
 729 void
 730 FGRenderer::resize( int width, int height ) {
 731     int view_h;
 732
 733     if ( (!fgGetBool("/sim/virtual-cockpit"))
 734          && fgPanelVisible() && idle_state == 1000 ) {
 735         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 736                              globals->get_current_panel()->getYOffset()) / 768.0);
 737     } else {
 738         view_h = height;
 739     }
 740
 741     static int lastwidth = 0;
 742     static int lastheight = 0;
 743     if (width != lastwidth)
 744         fgSetInt("/sim/startup/xsize", lastwidth = width);
 745     if (height != lastheight)
 746         fgSetInt("/sim/startup/ysize", lastheight = height);
 747
 748     // for all views
 749     FGViewMgr *viewmgr = globals->get_viewmgr();
 750     if (viewmgr) {
 751       for ( int i = 0; i < viewmgr->size(); ++i ) {
 752         viewmgr->get_view(i)->
 753           set_aspect_ratio((float)view_h / (float)width);
 754       }
 755     }
 756 }
 757
 758 bool
 759 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 760                  const osgGA::GUIEventAdapter* ea)
 761 {
 762     // wipe out the return ...
 763     pickList.clear();
 764     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 765     Intersections intersections;
 766
 767     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 768         return false;
 769     for (Intersections::iterator hit = intersections.begin(),
 770              e = intersections.end();
 771          hit != e;
 772          ++hit) {
 773         const osg::NodePath& np = hit->nodePath;
 774         osg::NodePath::const_reverse_iterator npi;
 775         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 776             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 777             if (!ud)
 778                 continue;
 779             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 780                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 781                 if (!pickCallback)
 782                     continue;
 783                 SGSceneryPick sceneryPick;
 784                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
 785                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
 786                 sceneryPick.callback = pickCallback;
 787                 pickList.push_back(sceneryPick);
 788             }
 789         }
 790     }
 791     return !pickList.empty();
 792 }
 793
 794 void
 795 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
 796 {
 797     viewer = viewer_;
 798 }
 799
 800 void
 801 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
 802 {
 803     eventHandler = eventHandler_;
 804 }
 805
 806 void
 807 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 808 {
 809     mRealRoot->addChild(camera);
 810 }
 811
 812 bool
 813 fgDumpSceneGraphToFile(const char* filename)
 814 {
 815     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 816 }
 817
 818 bool
 819 fgDumpTerrainBranchToFile(const char* filename)
 820 {
 821     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 822                                  filename );
 823 }
 824
 825 // For debugging
 826 bool
 827 fgDumpNodeToFile(osg::Node* node, const char* filename)
 828 {
 829     return osgDB::writeNodeFile(*node, filename);
 830 }
 831 // end of renderer.cxx
 832