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
 143     osg::StateSet* stateSet = getOrCreateStateSet();
 144     stateSet->setRenderBinDetails(1001, "RenderBin");
 145     // speed optimization?
 146     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 147     // We can do translucent menus, so why not. :-)
 148     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 149     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 150     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 151
 152     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 153
 154     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 155     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 156   }
 157   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 158   { drawImplementation(*renderInfo.getState()); }
 159   void drawImplementation(osg::State& state) const
 160   {
 161     state.setActiveTextureUnit(0);
 162     state.setClientActiveTextureUnit(0);
 163
 164     state.disableAllVertexArrays();
 165
 166     glPushAttrib(GL_ALL_ATTRIB_BITS);
 167     glPushClientAttrib(~0u);
 168
 169     puDisplay();
 170
 171     glPopClientAttrib();
 172     glPopAttrib();
 173   }
 174
 175   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 176   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 177
 178 private:
 179 };
 180
 181 class SGHUDAndPanelDrawable : public osg::Drawable {
 182 public:
 183   SGHUDAndPanelDrawable()
 184   {
 185     // Dynamic stuff, do not store geometry
 186     setUseDisplayList(false);
 187
 188     osg::StateSet* stateSet = getOrCreateStateSet();
 189     stateSet->setRenderBinDetails(1000, "RenderBin");
 190
 191     // speed optimization?
 192     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 193     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 194     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 195     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 196     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 197
 198     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 199   }
 200   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 201   { drawImplementation(*renderInfo.getState()); }
 202   void drawImplementation(osg::State& state) const
 203   {
 204     state.setActiveTextureUnit(0);
 205     state.setClientActiveTextureUnit(0);
 206     state.disableAllVertexArrays();
 207
 208     glPushAttrib(GL_ALL_ATTRIB_BITS);
 209     glPushClientAttrib(~0u);
 210
 211     fgCockpitUpdate(&state);
 212
 213     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 214     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 215     hud->draw(state);
 216
 217     // update the panel subsystem
 218     if ( globals->get_current_panel() != NULL )
 219         globals->get_current_panel()->update(state);
 220     // We don't need a state here - can be safely removed when we can pick
 221     // correctly
 222     fgUpdate3DPanels();
 223
 224     glPopClientAttrib();
 225     glPopAttrib();
 226
 227   }
 228
 229   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 230   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 231
 232 private:
 233 };
 234
 235 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 236 public:
 237
 238   /**
 239    * @param isSun true if the light is the actual sun i.e., for
 240    * illuminating the moon.
 241    */
 242   FGLightSourceUpdateCallback(bool isSun = false) : _isSun(isSun) {}
 243   FGLightSourceUpdateCallback(const FGLightSourceUpdateCallback& nc,
 244                               const CopyOp& op)
 245     : NodeCallback(nc, op), _isSun(nc._isSun)
 246   {}
 247   META_Object(flightgear,FGLightSourceUpdateCallback);
 248
 249   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 250   {
 251     assert(dynamic_cast<osg::LightSource*>(node));
 252     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 253     osg::Light* light = lightSource->getLight();
 254
 255     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 256     if (_isSun) {
 257       light->setAmbient(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 258       light->setDiffuse(Vec4(1.0f, 1.0f, 1.0f, 1.0f));
 259       light->setSpecular(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 260     } else {
 261       light->setAmbient(toOsg(l->scene_ambient()));
 262       light->setDiffuse(toOsg(l->scene_diffuse()));
 263       light->setSpecular(toOsg(l->scene_specular()));
 264     }
 265     osg::Vec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 266     light->setPosition(position);
 267
 268     traverse(node, nv);
 269   }
 270 private:
 271   const bool _isSun;
 272 };
 273
 274 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 275 public:
 276   FGWireFrameModeUpdateCallback() :
 277     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 278   { }
 279   virtual void operator()(osg::StateAttribute* stateAttribute,
 280                           osg::NodeVisitor*)
 281   {
 282     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 283     osg::PolygonMode* polygonMode;
 284     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 285
 286     if (mWireframe->getBoolValue())
 287       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 288                            osg::PolygonMode::LINE);
 289     else
 290       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 291                            osg::PolygonMode::FILL);
 292   }
 293 private:
 294   SGSharedPtr<SGPropertyNode> mWireframe;
 295 };
 296
 297 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 298 public:
 299   FGLightModelUpdateCallback() :
 300     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 301   { }
 302   virtual void operator()(osg::StateAttribute* stateAttribute,
 303                           osg::NodeVisitor*)
 304   {
 305     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 306     osg::LightModel* lightModel;
 307     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 308
 309 #if 0
 310     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 311     lightModel->setAmbientIntensity(toOsg(l->scene_ambient());
 312 #else
 313     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 314 #endif
 315     lightModel->setTwoSided(true);
 316     lightModel->setLocalViewer(false);
 317
 318     if (mHighlights->getBoolValue()) {
 319       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 320     } else {
 321       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 322     }
 323   }
 324 private:
 325   SGSharedPtr<SGPropertyNode> mHighlights;
 326 };
 327
 328 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 329 public:
 330   FGFogEnableUpdateCallback() :
 331     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 332   { }
 333   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 334   {
 335     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 336       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 337     } else {
 338       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 339     }
 340   }
 341 private:
 342   SGSharedPtr<SGPropertyNode> mFogEnabled;
 343 };
 344
 345 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 346 public:
 347   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 348   {
 349     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 350     assert(dynamic_cast<osg::Fog*>(sa));
 351     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 352     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 353     fog->setMode(osg::Fog::EXP2);
 354     fog->setColor(toOsg(updateVisitor->getFogColor()));
 355     fog->setDensity(updateVisitor->getFogExp2Density());
 356   }
 357 };
 358
 359 // update callback for the switch node guarding that splash
 360 class FGScenerySwitchCallback : public osg::NodeCallback {
 361 public:
 362   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 363   {
 364     assert(dynamic_cast<osg::Switch*>(node));
 365     osg::Switch* sw = static_cast<osg::Switch*>(node);
 366
 367     double t = globals->get_sim_time_sec();
 368     bool enabled = 0 < t;
 369     sw->setValue(0, enabled);
 370     if (!enabled)
 371       return;
 372     traverse(node, nv);
 373   }
 374 };
 375
 376 // Sky structures
 377 SGSky *thesky;
 378
 379 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 380 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 381
 382 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 383
 384 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 385
 386 FGRenderer::FGRenderer()
 387 {
 388 #ifdef FG_JPEG_SERVER
 389    jpgRenderFrame = FGRenderer::update;
 390 #endif
 391    eventHandler = new FGEventHandler;
 392 }
 393
 394 FGRenderer::~FGRenderer()
 395 {
 396 #ifdef FG_JPEG_SERVER
 397    jpgRenderFrame = NULL;
 398 #endif
 399 }
 400
 401 // Initialize various GL/view parameters
 402 // XXX This should be called "preinit" or something, as it initializes
 403 // critical parts of the scene graph in addition to the splash screen.
 404 void
 405 FGRenderer::splashinit( void ) {
 406     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 407     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 408     mRealRoot->addChild(fgCreateSplashNode());
 409     mFrameStamp = viewer->getFrameStamp();
 410     // Scene doesn't seem to pass the frame stamp to the update
 411     // visitor automatically.
 412     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 413     viewer->setUpdateVisitor(mUpdateVisitor.get());
 414 }
 415
 416 void
 417 FGRenderer::init( void )
 418 {
 419     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 420     osg::initNotifyLevel();
 421
 422     // The number of polygon-offset "units" to place between layers.  In
 423     // principle, one is supposed to be enough.  In practice, I find that
 424     // my hardware/driver requires many more.
 425     osg::PolygonOffset::setUnitsMultiplier(1);
 426     osg::PolygonOffset::setFactorMultiplier(1);
 427
 428     // Go full screen if requested ...
 429     if ( fgGetBool("/sim/startup/fullscreen") )
 430         fgOSFullScreen();
 431
 432     viewer->getCamera()
 433         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 434
 435     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 436
 437     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 438
 439     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 440     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 441
 442     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 443     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 444     stateSet->setAttribute(new osg::BlendFunc);
 445     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 446
 447     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 448
 449     // this will be set below
 450     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 451
 452     osg::Material* material = new osg::Material;
 453     stateSet->setAttribute(material);
 454
 455     stateSet->setTextureAttribute(0, new osg::TexEnv);
 456     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 457
 458     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 459     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 460     stateSet->setAttribute(hint);
 461     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 462     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 463     stateSet->setAttribute(hint);
 464     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 465     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 466     stateSet->setAttribute(hint);
 467     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 468     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 469     stateSet->setAttribute(hint);
 470     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 471     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 472     stateSet->setAttribute(hint);
 473
 474     osg::Group* sceneGroup = new osg::Group;
 475     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 476     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 477
 478     //sceneGroup->addChild(thesky->getCloudRoot());
 479
 480     stateSet = sceneGroup->getOrCreateStateSet();
 481     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 482
 483     // need to update the light on every frame
 484     // OSG LightSource objects are rather confusing. OSG only supports
 485     // the 10 lights specified by OpenGL itself; if more than one
 486     // LightSource in the scene graph have the same light number, it's
 487     // indeterminate which values will be used to render geometry that
 488     // has that light number enabled. Also, adding children to a
 489     // LightSource is just a shortcut for setting up a state set that
 490     // has the corresponding OpenGL light enabled: a LightSource will
 491     // affect geometry anywhere in the scene graph that has its light
 492     // number enabled in a state set.
 493     LightSource* lightSource = new LightSource;
 494     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
 495     // relative because of CameraView being just a clever transform node
 496     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 497     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 498     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 499     mRealRoot->addChild(lightSource);
 500     // we need a white diffuse light for the phase of the moon
 501     osg::LightSource* sunLight = new osg::LightSource;
 502     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
 503     sunLight->getLight()->setLightNum(1);
 504     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
 505     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 506     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
 507     // Hang a StateSet above the sky subgraph in order to turn off
 508     // light 0
 509     Group* skyGroup = new Group;
 510     StateSet* skySS = skyGroup->getOrCreateStateSet();
 511     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
 512     skyGroup->addChild(thesky->getPreRoot());
 513     sunLight->addChild(skyGroup);
 514     mRoot->addChild(sceneGroup);
 515     mRoot->addChild(sunLight);
 516     // Clouds are added to the scene graph later
 517     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 518     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 519     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 520     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 521
 522     // enable disable specular highlights.
 523     // is the place where we might plug in an other fragment shader ...
 524     osg::LightModel* lightModel = new osg::LightModel;
 525     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 526     stateSet->setAttribute(lightModel);
 527
 528     // switch to enable wireframe
 529     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 530     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 531     stateSet->setAttributeAndModes(polygonMode);
 532
 533     // scene fog handling
 534     osg::Fog* fog = new osg::Fog;
 535     fog->setUpdateCallback(new FGFogUpdateCallback);
 536     stateSet->setAttributeAndModes(fog);
 537     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 538
 539     // plug in the GUI
 540     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
 541     if (guiCamera) {
 542         osg::Geode* geode = new osg::Geode;
 543         geode->addDrawable(new SGPuDrawable);
 544         geode->addDrawable(new SGHUDAndPanelDrawable);
 545         guiCamera->addChild(geode);
 546     }
 547     osg::Switch* sw = new osg::Switch;
 548     sw->setUpdateCallback(new FGScenerySwitchCallback);
 549     sw->addChild(mRoot.get());
 550     mRealRoot->addChild(sw);
 551     // The clouds are attached directly to the scene graph root
 552     // because, in theory, they don't want the same default state set
 553     // as the rest of the scene. This may not be true in practice.
 554     mRealRoot->addChild(thesky->getCloudRoot());
 555     mRealRoot->addChild(FGCreateRedoutNode());
 556     // Attach empty program to the scene root so that shader programs
 557     // don't leak into state sets (effects) that shouldn't have one.
 558     stateSet = mRealRoot->getOrCreateStateSet();
 559     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
 560 }
 561
 562
 563 // Update all Visuals (redraws anything graphics related)
 564 void
 565 FGRenderer::update( bool refresh_camera_settings ) {
 566     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 567                           || fgGetBool("sim/sceneryloaded-override");
 568     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 569     if ( idle_state < 1000 || !scenery_loaded ) {
 570         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 571
 572         // Keep resetting sim time while the sim is initializing
 573         // the splash screen is now in the scenegraph
 574         globals->set_sim_time_sec( 0.0 );
 575         return;
 576     }
 577
 578     // Fade out the splash screen over the first three seconds.
 579     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 580     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 581
 582     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 583     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 584     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 585     bool distance_attenuation
 586         = fgGetBool("/sim/rendering/distance-attenuation");
 587     // OSGFIXME
 588     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 589                                   distance_attenuation );
 590
 591     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 592
 593     // update fog params
 594     double actual_visibility;
 595     if (fgGetBool("/environment/clouds/status")) {
 596         actual_visibility = thesky->get_visibility();
 597     } else {
 598         actual_visibility = fgGetDouble("/environment/visibility-m");
 599     }
 600
 601     // idle_state is now 1000 meaning we've finished all our
 602     // initializations and are running the main loop, so this will
 603     // now work without seg faulting the system.
 604
 605     FGViewer *current__view = globals->get_current_view();
 606     // Force update of center dependent values ...
 607     current__view->set_dirty();
 608
 609     if ( refresh_camera_settings ) {
 610         // update view port
 611         resize( fgGetInt("/sim/startup/xsize"),
 612                 fgGetInt("/sim/startup/ysize") );
 613     }
 614     osg::Camera *camera = viewer->getCamera();
 615
 616     if ( skyblend ) {
 617
 618         if ( fgGetBool("/sim/rendering/textures") ) {
 619             SGVec4f clearColor(l->adj_fog_color());
 620             camera->setClearColor(toOsg(clearColor));
 621         }
 622     } else {
 623         SGVec4f clearColor(l->sky_color());
 624         camera->setClearColor(toOsg(clearColor));
 625     }
 626
 627     // update fog params if visibility has changed
 628     double visibility_meters = fgGetDouble("/environment/visibility-m");
 629     thesky->set_visibility(visibility_meters);
 630
 631     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 632                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 633                         / (double)fgGetInt("/sim/model-hz") );
 634
 635     // update the sky dome
 636     if ( skyblend ) {
 637
 638         // The sun and moon distances are scaled down versions
 639         // of the actual distance to get both the moon and the sun
 640         // within the range of the far clip plane.
 641         // Moon distance:    384,467 kilometers
 642         // Sun distance: 150,000,000 kilometers
 643
 644         double sun_horiz_eff, moon_horiz_eff;
 645         if (fgGetBool("/sim/rendering/horizon-effect")) {
 646             sun_horiz_eff
 647                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
 648                                              0.0),
 649                              0.33) / 3.0;
 650             moon_horiz_eff
 651                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
 652                                              0.0),
 653                              0.33)/3.0;
 654         } else {
 655            sun_horiz_eff = moon_horiz_eff = 1.0;
 656         }
 657
 658         SGSkyState sstate;
 659         sstate.pos       = current__view->getViewPosition();
 660         sstate.pos_geod  = current__view->getPosition();
 661         sstate.ori       = current__view->getViewOrientation();
 662         sstate.spin      = l->get_sun_rotation();
 663         sstate.gst       = globals->get_time_params()->getGst();
 664         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 665         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 666         sstate.sun_angle = l->get_sun_angle();
 667
 668         SGSkyColor scolor;
 669         scolor.sky_color   = SGVec3f(l->sky_color().data());
 670         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
 671         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 672         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 673         scolor.sun_angle   = l->get_sun_angle();
 674         scolor.moon_angle  = l->get_moon_angle();
 675
 676         thesky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
 677         thesky->repaint( scolor, *globals->get_ephem() );
 678
 679         /*
 680         SG_LOG( SG_GENERAL, SG_BULK,
 681                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 682          << view_pos[1] << " " << view_pos[2] );
 683         SG_LOG( SG_GENERAL, SG_BULK,
 684                 "    zero_elev = " << zero_elev[0] << " "
 685          << zero_elev[1] << " " << zero_elev[2]
 686          << " lon = " << cur_fdm_state->get_Longitude()
 687          << " lat = " << cur_fdm_state->get_Latitude() );
 688         SG_LOG( SG_GENERAL, SG_BULK,
 689                 "    sun_rot = " << l->get_sun_rotation
 690          << " gst = " << SGTime::cur_time_params->getGst() );
 691         SG_LOG( SG_GENERAL, SG_BULK,
 692              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 693           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 694           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 695           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 696         */
 697
 698         //OSGFIXME
 699 //         shadows->setupShadows(
 700 //           current__view->getLongitude_deg(),
 701 //           current__view->getLatitude_deg(),
 702 //           globals->get_time_params()->getGst(),
 703 //           globals->get_ephem()->getSunRightAscension(),
 704 //           globals->get_ephem()->getSunDeclination(),
 705 //           l->get_sun_angle());
 706
 707     }
 708
 709 //     sgEnviro.setLight(l->adj_fog_color());
 710 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 711 //         current__view->get_world_up(),
 712 //         current__view->getLongitude_deg(),
 713 //         current__view->getLatitude_deg(),
 714 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 715 //         delta_time_sec);
 716
 717     // OSGFIXME
 718 //     sgEnviro.drawLightning();
 719
 720 //        double current_view_origin_airspeed_horiz_kt =
 721 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 722 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 723 //                                * SGD_DEGREES_TO_RADIANS);
 724
 725     // OSGFIXME
 726 //     if( is_internal )
 727 //         shadows->endOfFrame();
 728
 729     // need to call the update visitor once
 730     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 731     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 732                                 current__view->getViewOrientation());
 733     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 734     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 735                              l->scene_diffuse(), l->scene_specular(),
 736                              l->adj_fog_color(),
 737                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 738     mUpdateVisitor->setVisibility(actual_visibility);
 739     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 740     bool hotspots = fgGetBool("/sim/panel-hotspots");
 741     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 742     cullMask |= simgear::GroundLightManager::instance()
 743         ->getLightNodeMask(mUpdateVisitor.get());
 744     if (hotspots)
 745         cullMask |= simgear::PICK_BIT;
 746     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
 747 }
 748
 749
 750
 751 // options.cxx needs to see this for toggle_panel()
 752 // Handle new window size or exposure
 753 void
 754 FGRenderer::resize( int width, int height ) {
 755     int view_h;
 756
 757     if ( (!fgGetBool("/sim/virtual-cockpit"))
 758          && fgPanelVisible() && idle_state == 1000 ) {
 759         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 760                              globals->get_current_panel()->getYOffset()) / 768.0);
 761     } else {
 762         view_h = height;
 763     }
 764
 765     static int lastwidth = 0;
 766     static int lastheight = 0;
 767     if (width != lastwidth)
 768         fgSetInt("/sim/startup/xsize", lastwidth = width);
 769     if (height != lastheight)
 770         fgSetInt("/sim/startup/ysize", lastheight = height);
 771
 772     // for all views
 773     FGViewMgr *viewmgr = globals->get_viewmgr();
 774     if (viewmgr) {
 775       for ( int i = 0; i < viewmgr->size(); ++i ) {
 776         viewmgr->get_view(i)->
 777           set_aspect_ratio((float)view_h / (float)width);
 778       }
 779     }
 780 }
 781
 782 bool
 783 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 784                  const osgGA::GUIEventAdapter* ea)
 785 {
 786     // wipe out the return ...
 787     pickList.clear();
 788     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 789     Intersections intersections;
 790
 791     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 792         return false;
 793     for (Intersections::iterator hit = intersections.begin(),
 794              e = intersections.end();
 795          hit != e;
 796          ++hit) {
 797         const osg::NodePath& np = hit->nodePath;
 798         osg::NodePath::const_reverse_iterator npi;
 799         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 800             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 801             if (!ud)
 802                 continue;
 803             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 804                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 805                 if (!pickCallback)
 806                     continue;
 807                 SGSceneryPick sceneryPick;
 808                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
 809                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
 810                 sceneryPick.callback = pickCallback;
 811                 pickList.push_back(sceneryPick);
 812             }
 813         }
 814     }
 815     return !pickList.empty();
 816 }
 817
 818 void
 819 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
 820 {
 821     viewer = viewer_;
 822 }
 823
 824 void
 825 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
 826 {
 827     eventHandler = eventHandler_;
 828 }
 829
 830 void
 831 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 832 {
 833     mRealRoot->addChild(camera);
 834 }
 835
 836 bool
 837 fgDumpSceneGraphToFile(const char* filename)
 838 {
 839     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 840 }
 841
 842 bool
 843 fgDumpTerrainBranchToFile(const char* filename)
 844 {
 845     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 846                                  filename );
 847 }
 848
 849 // For debugging
 850 bool
 851 fgDumpNodeToFile(osg::Node* node, const char* filename)
 852 {
 853     return osgDB::writeNodeFile(*node, filename);
 854 }
 855 // end of renderer.cxx
 856