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 <algorithm>
  33 #include <iostream>
  34 #include <map>
  35 #include <vector>
  36 #include <typeinfo>
  37
  38 #include <osg/ref_ptr>
  39 #include <osg/AlphaFunc>
  40 #include <osg/BlendFunc>
  41 #include <osg/Camera>
  42 #include <osg/CullFace>
  43 #include <osg/CullStack>
  44 #include <osg/Depth>
  45 #include <osg/Fog>
  46 #include <osg/Group>
  47 #include <osg/Hint>
  48 #include <osg/Light>
  49 #include <osg/LightModel>
  50 #include <osg/LightSource>
  51 #include <osg/Material>
  52 #include <osg/Math>
  53 #include <osg/NodeCallback>
  54 #include <osg/Notify>
  55 #include <osg/PolygonMode>
  56 #include <osg/PolygonOffset>
  57 #include <osg/Program>
  58 #include <osg/Version>
  59 #include <osg/TexEnv>
  60
  61 #include <osgUtil/LineSegmentIntersector>
  62
  63 #include <osg/io_utils>
  64 #include <osgDB/WriteFile>
  65
  66 #include <simgear/math/SGMath.hxx>
  67 #include <simgear/scene/material/matlib.hxx>
  68 #include <simgear/scene/model/animation.hxx>
  69 #include <simgear/scene/model/placement.hxx>
  70 #include <simgear/scene/sky/sky.hxx>
  71 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  72 #include <simgear/scene/util/RenderConstants.hxx>
  73 #include <simgear/scene/util/SGSceneUserData.hxx>
  74 #include <simgear/scene/tgdb/GroundLightManager.hxx>
  75 #include <simgear/scene/tgdb/pt_lights.hxx>
  76 #include <simgear/structure/OSGUtils.hxx>
  77 #include <simgear/props/props.hxx>
  78 #include <simgear/timing/sg_time.hxx>
  79 #include <simgear/ephemeris/ephemeris.hxx>
  80 #include <simgear/math/sg_random.h>
  81 #ifdef FG_JPEG_SERVER
  82 #include <simgear/screen/jpgfactory.hxx>
  83 #endif
  84
  85 #include <simgear/environment/visual_enviro.hxx>
  86
  87 #include <Time/light.hxx>
  88 #include <Time/light.hxx>
  89 #include <Cockpit/panel.hxx>
  90 #include <Model/panelnode.hxx>
  91 #include <Model/modelmgr.hxx>
  92 #include <Model/acmodel.hxx>
  93 #include <Scenery/scenery.hxx>
  94 #include <Scenery/redout.hxx>
  95 #include <GUI/new_gui.hxx>
  96 #include <Instrumentation/HUD/HUD.hxx>
  97 #include <Environment/precipitation_mgr.hxx>
  98
  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 #include <Main/viewmgr.hxx>
 106
 107 using namespace osg;
 108 using namespace simgear;
 109 using namespace flightgear;
 110
 111 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 112 public:
 113   FGHintUpdateCallback(const char* configNode) :
 114     mConfigNode(fgGetNode(configNode, true))
 115   { }
 116   virtual void operator()(osg::StateAttribute* stateAttribute,
 117                           osg::NodeVisitor*)
 118   {
 119     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 120     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 121
 122     const char* value = mConfigNode->getStringValue();
 123     if (!value)
 124       hint->setMode(GL_DONT_CARE);
 125     else if (0 == strcmp(value, "nicest"))
 126       hint->setMode(GL_NICEST);
 127     else if (0 == strcmp(value, "fastest"))
 128       hint->setMode(GL_FASTEST);
 129     else
 130       hint->setMode(GL_DONT_CARE);
 131   }
 132 private:
 133   SGSharedPtr<SGPropertyNode> mConfigNode;
 134 };
 135
 136
 137 class SGPuDrawable : public osg::Drawable {
 138 public:
 139   SGPuDrawable()
 140   {
 141     // Dynamic stuff, do not store geometry
 142     setUseDisplayList(false);
 143     setDataVariance(Object::DYNAMIC);
 144
 145     osg::StateSet* stateSet = getOrCreateStateSet();
 146     stateSet->setRenderBinDetails(1001, "RenderBin");
 147     // speed optimization?
 148     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 149     // We can do translucent menus, so why not. :-)
 150     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 151     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 152     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 153
 154     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 155
 156     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 157     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 158   }
 159   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 160   { drawImplementation(*renderInfo.getState()); }
 161   void drawImplementation(osg::State& state) const
 162   {
 163     state.setActiveTextureUnit(0);
 164     state.setClientActiveTextureUnit(0);
 165
 166     state.disableAllVertexArrays();
 167
 168     glPushAttrib(GL_ALL_ATTRIB_BITS);
 169     glPushClientAttrib(~0u);
 170
 171     puDisplay();
 172
 173     glPopClientAttrib();
 174     glPopAttrib();
 175   }
 176
 177   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 178   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 179
 180 private:
 181 };
 182
 183 class SGHUDAndPanelDrawable : public osg::Drawable {
 184 public:
 185   SGHUDAndPanelDrawable()
 186   {
 187     // Dynamic stuff, do not store geometry
 188     setUseDisplayList(false);
 189     setDataVariance(Object::DYNAMIC);
 190
 191     osg::StateSet* stateSet = getOrCreateStateSet();
 192     stateSet->setRenderBinDetails(1000, "RenderBin");
 193
 194     // speed optimization?
 195     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 196     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 197     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 198     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 199     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 200
 201     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 202   }
 203   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 204   { drawImplementation(*renderInfo.getState()); }
 205   void drawImplementation(osg::State& state) const
 206   {
 207     state.setActiveTextureUnit(0);
 208     state.setClientActiveTextureUnit(0);
 209     state.disableAllVertexArrays();
 210
 211     glPushAttrib(GL_ALL_ATTRIB_BITS);
 212     glPushClientAttrib(~0u);
 213
 214     HUD *hud = static_cast<HUD*>(globals->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", false)
 567                           || fgGetBool("sim/sceneryloaded-override");
 568     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 569     if (!scenery_loaded) {
 570       fgSetDouble("/sim/startup/splash-alpha", 1.0);
 571       return;
 572     }
 573
 574     // Fade out the splash screen over the first three seconds.
 575     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 576     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 577
 578     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 579     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 580     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 581     bool distance_attenuation
 582         = fgGetBool("/sim/rendering/distance-attenuation");
 583     // OSGFIXME
 584     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 585                                   distance_attenuation );
 586
 587     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 588
 589     // update fog params
 590     double actual_visibility;
 591     if (fgGetBool("/environment/clouds/status")) {
 592         actual_visibility = thesky->get_visibility();
 593     } else {
 594         actual_visibility = fgGetDouble("/environment/visibility-m");
 595     }
 596
 597     // idle_state is now 1000 meaning we've finished all our
 598     // initializations and are running the main loop, so this will
 599     // now work without seg faulting the system.
 600
 601     FGViewer *current__view = globals->get_current_view();
 602     // Force update of center dependent values ...
 603     current__view->set_dirty();
 604
 605     if ( refresh_camera_settings ) {
 606         // update view port
 607         resize( fgGetInt("/sim/startup/xsize"),
 608                 fgGetInt("/sim/startup/ysize") );
 609     }
 610     osg::Camera *camera = viewer->getCamera();
 611
 612     if ( skyblend ) {
 613
 614         if ( fgGetBool("/sim/rendering/textures") ) {
 615             SGVec4f clearColor(l->adj_fog_color());
 616             camera->setClearColor(toOsg(clearColor));
 617         }
 618     } else {
 619         SGVec4f clearColor(l->sky_color());
 620         camera->setClearColor(toOsg(clearColor));
 621     }
 622
 623     // update fog params if visibility has changed
 624     double visibility_meters = fgGetDouble("/environment/visibility-m");
 625     thesky->set_visibility(visibility_meters);
 626
 627     double altitude_m = fgGetDouble("/position/altitude-ft") * SG_FEET_TO_METER;
 628     thesky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
 629
 630     // update the sky dome
 631     if ( skyblend ) {
 632
 633         // The sun and moon distances are scaled down versions
 634         // of the actual distance to get both the moon and the sun
 635         // within the range of the far clip plane.
 636         // Moon distance:    384,467 kilometers
 637         // Sun distance: 150,000,000 kilometers
 638
 639         double sun_horiz_eff, moon_horiz_eff;
 640         if (fgGetBool("/sim/rendering/horizon-effect")) {
 641             sun_horiz_eff
 642                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
 643                                              0.0),
 644                              0.33) / 3.0;
 645             moon_horiz_eff
 646                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
 647                                              0.0),
 648                              0.33)/3.0;
 649         } else {
 650            sun_horiz_eff = moon_horiz_eff = 1.0;
 651         }
 652
 653         SGSkyState sstate;
 654         sstate.pos       = current__view->getViewPosition();
 655         sstate.pos_geod  = current__view->getPosition();
 656         sstate.ori       = current__view->getViewOrientation();
 657         sstate.spin      = l->get_sun_rotation();
 658         sstate.gst       = globals->get_time_params()->getGst();
 659         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 660         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 661         sstate.sun_angle = l->get_sun_angle();
 662
 663         SGSkyColor scolor;
 664         scolor.sky_color   = SGVec3f(l->sky_color().data());
 665         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
 666         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 667         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 668         scolor.sun_angle   = l->get_sun_angle();
 669         scolor.moon_angle  = l->get_moon_angle();
 670
 671         double delta_time_sec = fgGetDouble("/sim/time/delta-sec");
 672         thesky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
 673         thesky->repaint( scolor, *globals->get_ephem() );
 674
 675             //OSGFIXME
 676 //         shadows->setupShadows(
 677 //           current__view->getLongitude_deg(),
 678 //           current__view->getLatitude_deg(),
 679 //           globals->get_time_params()->getGst(),
 680 //           globals->get_ephem()->getSunRightAscension(),
 681 //           globals->get_ephem()->getSunDeclination(),
 682 //           l->get_sun_angle());
 683
 684     }
 685
 686 //     sgEnviro.setLight(l->adj_fog_color());
 687 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 688 //         current__view->get_world_up(),
 689 //         current__view->getLongitude_deg(),
 690 //         current__view->getLatitude_deg(),
 691 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 692 //         delta_time_sec);
 693
 694     // OSGFIXME
 695 //     sgEnviro.drawLightning();
 696
 697 //        double current_view_origin_airspeed_horiz_kt =
 698 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 699 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 700 //                                * SGD_DEGREES_TO_RADIANS);
 701
 702     // OSGFIXME
 703 //     if( is_internal )
 704 //         shadows->endOfFrame();
 705
 706     // need to call the update visitor once
 707     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 708     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 709                                 current__view->getViewOrientation());
 710     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 711     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 712                              l->scene_diffuse(), l->scene_specular(),
 713                              l->adj_fog_color(),
 714                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 715     mUpdateVisitor->setVisibility(actual_visibility);
 716     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 717     bool hotspots = fgGetBool("/sim/panel-hotspots");
 718     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 719     cullMask |= simgear::GroundLightManager::instance()
 720         ->getLightNodeMask(mUpdateVisitor.get());
 721     if (hotspots)
 722         cullMask |= simgear::PICK_BIT;
 723     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
 724 }
 725
 726
 727
 728 // options.cxx needs to see this for toggle_panel()
 729 // Handle new window size or exposure
 730 void
 731 FGRenderer::resize( int width, int height ) {
 732     int view_h;
 733
 734     if ( (!fgGetBool("/sim/virtual-cockpit"))
 735          && fgPanelVisible() && idle_state == 1000 ) {
 736         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 737                              globals->get_current_panel()->getYOffset()) / 768.0);
 738     } else {
 739         view_h = height;
 740     }
 741
 742     static int lastwidth = 0;
 743     static int lastheight = 0;
 744     if (width != lastwidth)
 745         fgSetInt("/sim/startup/xsize", lastwidth = width);
 746     if (height != lastheight)
 747         fgSetInt("/sim/startup/ysize", lastheight = height);
 748
 749     // for all views
 750     FGViewMgr *viewmgr = globals->get_viewmgr();
 751     if (viewmgr) {
 752       for ( int i = 0; i < viewmgr->size(); ++i ) {
 753         viewmgr->get_view(i)->
 754           set_aspect_ratio((float)view_h / (float)width);
 755       }
 756     }
 757 }
 758
 759 bool
 760 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 761                  const osgGA::GUIEventAdapter* ea)
 762 {
 763     // wipe out the return ...
 764     pickList.clear();
 765     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 766     Intersections intersections;
 767
 768     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 769         return false;
 770     for (Intersections::iterator hit = intersections.begin(),
 771              e = intersections.end();
 772          hit != e;
 773          ++hit) {
 774         const osg::NodePath& np = hit->nodePath;
 775         osg::NodePath::const_reverse_iterator npi;
 776         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 777             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 778             if (!ud)
 779                 continue;
 780             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 781                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 782                 if (!pickCallback)
 783                     continue;
 784                 SGSceneryPick sceneryPick;
 785                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
 786                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
 787                 sceneryPick.callback = pickCallback;
 788                 pickList.push_back(sceneryPick);
 789             }
 790         }
 791     }
 792     return !pickList.empty();
 793 }
 794
 795 void
 796 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
 797 {
 798     viewer = viewer_;
 799 }
 800
 801 void
 802 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
 803 {
 804     eventHandler = eventHandler_;
 805 }
 806
 807 void
 808 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 809 {
 810     mRealRoot->addChild(camera);
 811 }
 812
 813 bool
 814 fgDumpSceneGraphToFile(const char* filename)
 815 {
 816     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 817 }
 818
 819 bool
 820 fgDumpTerrainBranchToFile(const char* filename)
 821 {
 822     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 823                                  filename );
 824 }
 825
 826 // For debugging
 827 bool
 828 fgDumpNodeToFile(osg::Node* node, const char* filename)
 829 {
 830     return osgDB::writeNodeFile(*node, filename);
 831 }
 832
 833 namespace flightgear
 834 {
 835 using namespace osg;
 836
 837 class VisibleSceneInfoVistor : public NodeVisitor, CullStack
 838 {
 839 public:
 840     VisibleSceneInfoVistor()
 841         : NodeVisitor(CULL_VISITOR, TRAVERSE_ACTIVE_CHILDREN)
 842     {
 843         setCullingMode(CullSettings::SMALL_FEATURE_CULLING
 844                        | CullSettings::VIEW_FRUSTUM_CULLING);
 845         setComputeNearFarMode(CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 846     }
 847
 848     VisibleSceneInfoVistor(const VisibleSceneInfoVistor& rhs)
 849     {
 850     }
 851
 852     META_NodeVisitor("flightgear","VisibleSceneInfoVistor")
 853
 854     typedef std::map<const std::string,int> InfoMap;
 855
 856     void getNodeInfo(Node* node)
 857     {
 858         const char* typeName = typeid(*node).name();
 859         classInfo[typeName]++;
 860         const std::string& nodeName = node->getName();
 861         if (!nodeName.empty())
 862             nodeInfo[nodeName]++;
 863     }
 864
 865     void dumpInfo()
 866     {
 867         using namespace std;
 868         typedef vector<InfoMap::iterator> FreqVector;
 869         cout << "class info:\n";
 870         FreqVector classes;
 871         for (InfoMap::iterator itr = classInfo.begin(), end = classInfo.end();
 872              itr != end;
 873              ++itr)
 874             classes.push_back(itr);
 875         sort(classes.begin(), classes.end(), freqComp);
 876         for (FreqVector::iterator itr = classes.begin(), end = classes.end();
 877              itr != end;
 878              ++itr) {
 879             cout << (*itr)->first << " " << (*itr)->second << "\n";
 880         }
 881         cout << "\nnode info:\n";
 882         FreqVector nodes;
 883         for (InfoMap::iterator itr = nodeInfo.begin(), end = nodeInfo.end();
 884              itr != end;
 885              ++itr)
 886             nodes.push_back(itr);
 887
 888         sort (nodes.begin(), nodes.end(), freqComp);
 889         for (FreqVector::iterator itr = nodes.begin(), end = nodes.end();
 890              itr != end;
 891              ++itr) {
 892             cout << (*itr)->first << " " << (*itr)->second << "\n";
 893         }
 894         cout << endl;
 895     }
 896
 897     void doTraversal(Camera* camera, Node* root, Viewport* viewport)
 898     {
 899         ref_ptr<RefMatrix> projection
 900             = createOrReuseMatrix(camera->getProjectionMatrix());
 901         ref_ptr<RefMatrix> mv = createOrReuseMatrix(camera->getViewMatrix());
 902         if (!viewport)
 903             viewport = camera->getViewport();
 904         if (viewport)
 905             pushViewport(viewport);
 906         pushProjectionMatrix(projection.get());
 907         pushModelViewMatrix(mv.get(), Transform::ABSOLUTE_RF);
 908         root->accept(*this);
 909         popModelViewMatrix();
 910         popProjectionMatrix();
 911         if (viewport)
 912             popViewport();
 913         dumpInfo();
 914     }
 915
 916     void apply(Node& node)
 917     {
 918         if (isCulled(node))
 919             return;
 920         pushCurrentMask();
 921         getNodeInfo(&node);
 922         traverse(node);
 923         popCurrentMask();
 924     }
 925     void apply(Group& node)
 926     {
 927         if (isCulled(node))
 928             return;
 929         pushCurrentMask();
 930         getNodeInfo(&node);
 931         traverse(node);
 932         popCurrentMask();
 933     }
 934
 935     void apply(Transform& node)
 936     {
 937         if (isCulled(node))
 938             return;
 939         pushCurrentMask();
 940         ref_ptr<RefMatrix> matrix = createOrReuseMatrix(*getModelViewMatrix());
 941         node.computeLocalToWorldMatrix(*matrix,this);
 942         pushModelViewMatrix(matrix.get(), node.getReferenceFrame());
 943         getNodeInfo(&node);
 944         traverse(node);
 945         popModelViewMatrix();
 946         popCurrentMask();
 947     }
 948
 949     void apply(Camera& camera)
 950     {
 951         // Save current cull settings
 952         CullSettings saved_cull_settings(*this);
 953
 954         // set cull settings from this Camera
 955         setCullSettings(camera);
 956         // inherit the settings from above
 957         inheritCullSettings(saved_cull_settings, camera.getInheritanceMask());
 958
 959         // set the cull mask.
 960         unsigned int savedTraversalMask = getTraversalMask();
 961         bool mustSetCullMask = (camera.getInheritanceMask()
 962                                 & osg::CullSettings::CULL_MASK) == 0;
 963         if (mustSetCullMask)
 964             setTraversalMask(camera.getCullMask());
 965
 966         osg::RefMatrix* projection = 0;
 967         osg::RefMatrix* modelview = 0;
 968
 969         if (camera.getReferenceFrame()==osg::Transform::RELATIVE_RF) {
 970             if (camera.getTransformOrder()==osg::Camera::POST_MULTIPLY) {
 971                 projection = createOrReuseMatrix(*getProjectionMatrix()
 972                                                  *camera.getProjectionMatrix());
 973                 modelview = createOrReuseMatrix(*getModelViewMatrix()
 974                                                 * camera.getViewMatrix());
 975             }
 976             else {              // pre multiply
 977                 projection = createOrReuseMatrix(camera.getProjectionMatrix()
 978                                                  * (*getProjectionMatrix()));
 979                 modelview = createOrReuseMatrix(camera.getViewMatrix()
 980                                                 * (*getModelViewMatrix()));
 981             }
 982         } else {
 983             // an absolute reference frame
 984             projection = createOrReuseMatrix(camera.getProjectionMatrix());
 985             modelview = createOrReuseMatrix(camera.getViewMatrix());
 986         }
 987         if (camera.getViewport())
 988             pushViewport(camera.getViewport());
 989
 990         pushProjectionMatrix(projection);
 991         pushModelViewMatrix(modelview, camera.getReferenceFrame());
 992
 993         traverse(camera);
 994
 995         // restore the previous model view matrix.
 996         popModelViewMatrix();
 997
 998         // restore the previous model view matrix.
 999         popProjectionMatrix();
1000
1001         if (camera.getViewport()) popViewport();
1002
1003         // restore the previous traversal mask settings
1004         if (mustSetCullMask)
1005             setTraversalMask(savedTraversalMask);
1006
1007         // restore the previous cull settings
1008         setCullSettings(saved_cull_settings);
1009     }
1010
1011 protected:
1012     // sort in reverse
1013     static bool freqComp(const InfoMap::iterator& lhs, const InfoMap::iterator& rhs)
1014     {
1015         return lhs->second > rhs->second;
1016     }
1017     InfoMap classInfo;
1018     InfoMap nodeInfo;
1019 };
1020
1021 bool printVisibleSceneInfo(FGRenderer* renderer)
1022 {
1023     osgViewer::Viewer* viewer = renderer->getViewer();
1024     VisibleSceneInfoVistor vsv;
1025     Viewport* vp = 0;
1026     if (!viewer->getCamera()->getViewport() && viewer->getNumSlaves() > 0) {
1027         const View::Slave& slave = viewer->getSlave(0);
1028         vp = slave._camera->getViewport();
1029     }
1030     vsv.doTraversal(viewer->getCamera(), viewer->getSceneData(), vp);
1031     return true;
1032 }
1033 }
1034 // end of renderer.cxx
1035