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 <Scenery/tilemgr.hxx>
  96 #include <GUI/new_gui.hxx>
  97 #include <Instrumentation/HUD/HUD.hxx>
  98 #include <Environment/precipitation_mgr.hxx>
  99
 100 #include "splash.hxx"
 101 #include "renderer.hxx"
 102 #include "main.hxx"
 103 #include "CameraGroup.hxx"
 104 #include "FGEventHandler.hxx"
 105 #include <Main/viewer.hxx>
 106 #include <Main/viewmgr.hxx>
 107
 108 using namespace osg;
 109 using namespace simgear;
 110 using namespace flightgear;
 111
 112 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 113 public:
 114   FGHintUpdateCallback(const char* configNode) :
 115     mConfigNode(fgGetNode(configNode, true))
 116   { }
 117   virtual void operator()(osg::StateAttribute* stateAttribute,
 118                           osg::NodeVisitor*)
 119   {
 120     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 121     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 122
 123     const char* value = mConfigNode->getStringValue();
 124     if (!value)
 125       hint->setMode(GL_DONT_CARE);
 126     else if (0 == strcmp(value, "nicest"))
 127       hint->setMode(GL_NICEST);
 128     else if (0 == strcmp(value, "fastest"))
 129       hint->setMode(GL_FASTEST);
 130     else
 131       hint->setMode(GL_DONT_CARE);
 132   }
 133 private:
 134   SGSharedPtr<SGPropertyNode> mConfigNode;
 135 };
 136
 137
 138 class SGPuDrawable : public osg::Drawable {
 139 public:
 140   SGPuDrawable()
 141   {
 142     // Dynamic stuff, do not store geometry
 143     setUseDisplayList(false);
 144     setDataVariance(Object::DYNAMIC);
 145
 146     osg::StateSet* stateSet = getOrCreateStateSet();
 147     stateSet->setRenderBinDetails(1001, "RenderBin");
 148     // speed optimization?
 149     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 150     // We can do translucent menus, so why not. :-)
 151     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 152     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 153     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 154
 155     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 156
 157     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 158     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 159   }
 160   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 161   { drawImplementation(*renderInfo.getState()); }
 162   void drawImplementation(osg::State& state) const
 163   {
 164     state.setActiveTextureUnit(0);
 165     state.setClientActiveTextureUnit(0);
 166
 167     state.disableAllVertexArrays();
 168
 169     glPushAttrib(GL_ALL_ATTRIB_BITS);
 170     glPushClientAttrib(~0u);
 171
 172     puDisplay();
 173
 174     glPopClientAttrib();
 175     glPopAttrib();
 176   }
 177
 178   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 179   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 180
 181 private:
 182 };
 183
 184 class SGHUDAndPanelDrawable : public osg::Drawable {
 185 public:
 186   SGHUDAndPanelDrawable()
 187   {
 188     // Dynamic stuff, do not store geometry
 189     setUseDisplayList(false);
 190     setDataVariance(Object::DYNAMIC);
 191
 192     osg::StateSet* stateSet = getOrCreateStateSet();
 193     stateSet->setRenderBinDetails(1000, "RenderBin");
 194
 195     // speed optimization?
 196     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 197     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 198     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 199     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 200     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 201
 202     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 203   }
 204   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 205   { drawImplementation(*renderInfo.getState()); }
 206   void drawImplementation(osg::State& state) const
 207   {
 208     state.setActiveTextureUnit(0);
 209     state.setClientActiveTextureUnit(0);
 210     state.disableAllVertexArrays();
 211
 212     glPushAttrib(GL_ALL_ATTRIB_BITS);
 213     glPushClientAttrib(~0u);
 214
 215     HUD *hud = static_cast<HUD*>(globals->get_subsystem("hud"));
 216     hud->draw(state);
 217
 218     // update the panel subsystem
 219     if ( globals->get_current_panel() != NULL )
 220         globals->get_current_panel()->update(state);
 221     // We don't need a state here - can be safely removed when we can pick
 222     // correctly
 223     fgUpdate3DPanels();
 224
 225     glPopClientAttrib();
 226     glPopAttrib();
 227
 228   }
 229
 230   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 231   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 232
 233 private:
 234 };
 235
 236 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 237 public:
 238
 239   /**
 240    * @param isSun true if the light is the actual sun i.e., for
 241    * illuminating the moon.
 242    */
 243   FGLightSourceUpdateCallback(bool isSun = false) : _isSun(isSun) {}
 244   FGLightSourceUpdateCallback(const FGLightSourceUpdateCallback& nc,
 245                               const CopyOp& op)
 246     : NodeCallback(nc, op), _isSun(nc._isSun)
 247   {}
 248   META_Object(flightgear,FGLightSourceUpdateCallback);
 249
 250   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 251   {
 252     assert(dynamic_cast<osg::LightSource*>(node));
 253     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 254     osg::Light* light = lightSource->getLight();
 255
 256     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 257     if (_isSun) {
 258       light->setAmbient(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 259       light->setDiffuse(Vec4(1.0f, 1.0f, 1.0f, 1.0f));
 260       light->setSpecular(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 261     } else {
 262       light->setAmbient(toOsg(l->scene_ambient()));
 263       light->setDiffuse(toOsg(l->scene_diffuse()));
 264       light->setSpecular(toOsg(l->scene_specular()));
 265     }
 266     osg::Vec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 267     light->setPosition(position);
 268
 269     traverse(node, nv);
 270   }
 271 private:
 272   const bool _isSun;
 273 };
 274
 275 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 276 public:
 277   FGWireFrameModeUpdateCallback() :
 278     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 279   { }
 280   virtual void operator()(osg::StateAttribute* stateAttribute,
 281                           osg::NodeVisitor*)
 282   {
 283     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 284     osg::PolygonMode* polygonMode;
 285     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 286
 287     if (mWireframe->getBoolValue())
 288       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 289                            osg::PolygonMode::LINE);
 290     else
 291       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 292                            osg::PolygonMode::FILL);
 293   }
 294 private:
 295   SGSharedPtr<SGPropertyNode> mWireframe;
 296 };
 297
 298 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 299 public:
 300   FGLightModelUpdateCallback() :
 301     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 302   { }
 303   virtual void operator()(osg::StateAttribute* stateAttribute,
 304                           osg::NodeVisitor*)
 305   {
 306     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 307     osg::LightModel* lightModel;
 308     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 309
 310 #if 0
 311     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 312     lightModel->setAmbientIntensity(toOsg(l->scene_ambient());
 313 #else
 314     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 315 #endif
 316     lightModel->setTwoSided(true);
 317     lightModel->setLocalViewer(false);
 318
 319     if (mHighlights->getBoolValue()) {
 320       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 321     } else {
 322       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 323     }
 324   }
 325 private:
 326   SGSharedPtr<SGPropertyNode> mHighlights;
 327 };
 328
 329 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 330 public:
 331   FGFogEnableUpdateCallback() :
 332     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 333   { }
 334   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 335   {
 336     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 337       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 338     } else {
 339       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 340     }
 341   }
 342 private:
 343   SGSharedPtr<SGPropertyNode> mFogEnabled;
 344 };
 345
 346 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 347 public:
 348   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 349   {
 350     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 351     assert(dynamic_cast<osg::Fog*>(sa));
 352     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 353     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 354     fog->setMode(osg::Fog::EXP2);
 355     fog->setColor(toOsg(updateVisitor->getFogColor()));
 356     fog->setDensity(updateVisitor->getFogExp2Density());
 357   }
 358 };
 359
 360 // update callback for the switch node guarding that splash
 361 class FGScenerySwitchCallback : public osg::NodeCallback {
 362 public:
 363   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 364   {
 365     assert(dynamic_cast<osg::Switch*>(node));
 366     osg::Switch* sw = static_cast<osg::Switch*>(node);
 367
 368     double t = globals->get_sim_time_sec();
 369     bool enabled = 0 < t;
 370     sw->setValue(0, enabled);
 371     if (!enabled)
 372       return;
 373     traverse(node, nv);
 374   }
 375 };
 376
 377 // Sky structures
 378 SGSky *thesky;
 379
 380 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 381 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 382
 383 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 384
 385 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 386
 387 FGRenderer::FGRenderer()
 388 {
 389 #ifdef FG_JPEG_SERVER
 390    jpgRenderFrame = FGRenderer::update;
 391 #endif
 392    eventHandler = new FGEventHandler;
 393 }
 394
 395 FGRenderer::~FGRenderer()
 396 {
 397 #ifdef FG_JPEG_SERVER
 398    jpgRenderFrame = NULL;
 399 #endif
 400 }
 401
 402 // Initialize various GL/view parameters
 403 // XXX This should be called "preinit" or something, as it initializes
 404 // critical parts of the scene graph in addition to the splash screen.
 405 void
 406 FGRenderer::splashinit( void ) {
 407     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 408     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 409     mRealRoot->addChild(fgCreateSplashNode());
 410     mFrameStamp = viewer->getFrameStamp();
 411     // Scene doesn't seem to pass the frame stamp to the update
 412     // visitor automatically.
 413     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 414     viewer->setUpdateVisitor(mUpdateVisitor.get());
 415 }
 416
 417 void
 418 FGRenderer::init( void )
 419 {
 420     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 421     osg::initNotifyLevel();
 422
 423     // The number of polygon-offset "units" to place between layers.  In
 424     // principle, one is supposed to be enough.  In practice, I find that
 425     // my hardware/driver requires many more.
 426     osg::PolygonOffset::setUnitsMultiplier(1);
 427     osg::PolygonOffset::setFactorMultiplier(1);
 428
 429     // Go full screen if requested ...
 430     if ( fgGetBool("/sim/startup/fullscreen") )
 431         fgOSFullScreen();
 432
 433     viewer->getCamera()
 434         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 435
 436     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 437
 438     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 439
 440     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 441     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 442
 443     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 444     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 445     stateSet->setAttribute(new osg::BlendFunc);
 446     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 447
 448     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 449
 450     // this will be set below
 451     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 452
 453     osg::Material* material = new osg::Material;
 454     stateSet->setAttribute(material);
 455
 456     stateSet->setTextureAttribute(0, new osg::TexEnv);
 457     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 458
 459     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 460     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 461     stateSet->setAttribute(hint);
 462     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 463     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 464     stateSet->setAttribute(hint);
 465     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 466     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 467     stateSet->setAttribute(hint);
 468     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 469     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 470     stateSet->setAttribute(hint);
 471     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 472     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 473     stateSet->setAttribute(hint);
 474
 475     osg::Group* sceneGroup = new osg::Group;
 476     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 477     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 478
 479     //sceneGroup->addChild(thesky->getCloudRoot());
 480
 481     stateSet = sceneGroup->getOrCreateStateSet();
 482     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 483
 484     // need to update the light on every frame
 485     // OSG LightSource objects are rather confusing. OSG only supports
 486     // the 10 lights specified by OpenGL itself; if more than one
 487     // LightSource in the scene graph have the same light number, it's
 488     // indeterminate which values will be used to render geometry that
 489     // has that light number enabled. Also, adding children to a
 490     // LightSource is just a shortcut for setting up a state set that
 491     // has the corresponding OpenGL light enabled: a LightSource will
 492     // affect geometry anywhere in the scene graph that has its light
 493     // number enabled in a state set.
 494     LightSource* lightSource = new LightSource;
 495     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
 496     // relative because of CameraView being just a clever transform node
 497     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 498     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 499     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 500     mRealRoot->addChild(lightSource);
 501     // we need a white diffuse light for the phase of the moon
 502     osg::LightSource* sunLight = new osg::LightSource;
 503     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
 504     sunLight->getLight()->setLightNum(1);
 505     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
 506     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 507     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
 508     // Hang a StateSet above the sky subgraph in order to turn off
 509     // light 0
 510     Group* skyGroup = new Group;
 511     StateSet* skySS = skyGroup->getOrCreateStateSet();
 512     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
 513     skyGroup->addChild(thesky->getPreRoot());
 514     sunLight->addChild(skyGroup);
 515     mRoot->addChild(sceneGroup);
 516     mRoot->addChild(sunLight);
 517     // Clouds are added to the scene graph later
 518     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 519     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 520     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 521     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 522
 523     // enable disable specular highlights.
 524     // is the place where we might plug in an other fragment shader ...
 525     osg::LightModel* lightModel = new osg::LightModel;
 526     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 527     stateSet->setAttribute(lightModel);
 528
 529     // switch to enable wireframe
 530     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 531     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 532     stateSet->setAttributeAndModes(polygonMode);
 533
 534     // scene fog handling
 535     osg::Fog* fog = new osg::Fog;
 536     fog->setUpdateCallback(new FGFogUpdateCallback);
 537     stateSet->setAttributeAndModes(fog);
 538     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 539
 540     // plug in the GUI
 541     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
 542     if (guiCamera) {
 543         osg::Geode* geode = new osg::Geode;
 544         geode->addDrawable(new SGPuDrawable);
 545         geode->addDrawable(new SGHUDAndPanelDrawable);
 546         guiCamera->addChild(geode);
 547     }
 548     osg::Switch* sw = new osg::Switch;
 549     sw->setUpdateCallback(new FGScenerySwitchCallback);
 550     sw->addChild(mRoot.get());
 551     mRealRoot->addChild(sw);
 552     // The clouds are attached directly to the scene graph root
 553     // because, in theory, they don't want the same default state set
 554     // as the rest of the scene. This may not be true in practice.
 555     mRealRoot->addChild(thesky->getCloudRoot());
 556     mRealRoot->addChild(FGCreateRedoutNode());
 557     // Attach empty program to the scene root so that shader programs
 558     // don't leak into state sets (effects) that shouldn't have one.
 559     stateSet = mRealRoot->getOrCreateStateSet();
 560     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
 561 }
 562
 563
 564 // Update all Visuals (redraws anything graphics related)
 565 void
 566 FGRenderer::update( bool refresh_camera_settings ) {
 567     bool scenery_loaded = fgGetBool("sim/sceneryloaded", false)
 568                           || fgGetBool("sim/sceneryloaded-override");
 569     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 570     if (!scenery_loaded) {
 571       fgSetDouble("/sim/startup/splash-alpha", 1.0);
 572       return;
 573     }
 574
 575     // Fade out the splash screen over the first three seconds.
 576     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 577     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 578
 579     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 580     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 581     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 582     bool distance_attenuation
 583         = fgGetBool("/sim/rendering/distance-attenuation");
 584     // OSGFIXME
 585     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 586                                   distance_attenuation );
 587
 588     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 589
 590     // update fog params
 591     double actual_visibility;
 592     if (fgGetBool("/environment/clouds/status")) {
 593         actual_visibility = thesky->get_visibility();
 594     } else {
 595         actual_visibility = fgGetDouble("/environment/visibility-m");
 596     }
 597
 598     // idle_state is now 1000 meaning we've finished all our
 599     // initializations and are running the main loop, so this will
 600     // now work without seg faulting the system.
 601
 602     FGViewer *current__view = globals->get_current_view();
 603     // Force update of center dependent values ...
 604     current__view->set_dirty();
 605
 606     if ( refresh_camera_settings ) {
 607         // update view port
 608         resize( fgGetInt("/sim/startup/xsize"),
 609                 fgGetInt("/sim/startup/ysize") );
 610     }
 611     osg::Camera *camera = viewer->getCamera();
 612
 613     if ( skyblend ) {
 614
 615         if ( fgGetBool("/sim/rendering/textures") ) {
 616             SGVec4f clearColor(l->adj_fog_color());
 617             camera->setClearColor(toOsg(clearColor));
 618         }
 619     } else {
 620         SGVec4f clearColor(l->sky_color());
 621         camera->setClearColor(toOsg(clearColor));
 622     }
 623
 624     // update fog params if visibility has changed
 625     double visibility_meters = fgGetDouble("/environment/visibility-m");
 626     thesky->set_visibility(visibility_meters);
 627
 628     double altitude_m = fgGetDouble("/position/altitude-ft") * SG_FEET_TO_METER;
 629     thesky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
 630
 631     // update the sky dome
 632     if ( skyblend ) {
 633
 634         // The sun and moon distances are scaled down versions
 635         // of the actual distance to get both the moon and the sun
 636         // within the range of the far clip plane.
 637         // Moon distance:    384,467 kilometers
 638         // Sun distance: 150,000,000 kilometers
 639
 640         double sun_horiz_eff, moon_horiz_eff;
 641         if (fgGetBool("/sim/rendering/horizon-effect")) {
 642             sun_horiz_eff
 643                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
 644                                              0.0),
 645                              0.33) / 3.0;
 646             moon_horiz_eff
 647                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
 648                                              0.0),
 649                              0.33)/3.0;
 650         } else {
 651            sun_horiz_eff = moon_horiz_eff = 1.0;
 652         }
 653
 654         SGSkyState sstate;
 655         sstate.pos       = current__view->getViewPosition();
 656         sstate.pos_geod  = current__view->getPosition();
 657         sstate.ori       = current__view->getViewOrientation();
 658         sstate.spin      = l->get_sun_rotation();
 659         sstate.gst       = globals->get_time_params()->getGst();
 660         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 661         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 662         sstate.sun_angle = l->get_sun_angle();
 663
 664         SGSkyColor scolor;
 665         scolor.sky_color   = SGVec3f(l->sky_color().data());
 666         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
 667         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 668         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 669         scolor.sun_angle   = l->get_sun_angle();
 670         scolor.moon_angle  = l->get_moon_angle();
 671
 672         double delta_time_sec = fgGetDouble("/sim/time/delta-sec");
 673         thesky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
 674         thesky->repaint( scolor, *globals->get_ephem() );
 675
 676             //OSGFIXME
 677 //         shadows->setupShadows(
 678 //           current__view->getLongitude_deg(),
 679 //           current__view->getLatitude_deg(),
 680 //           globals->get_time_params()->getGst(),
 681 //           globals->get_ephem()->getSunRightAscension(),
 682 //           globals->get_ephem()->getSunDeclination(),
 683 //           l->get_sun_angle());
 684
 685     }
 686
 687 //     sgEnviro.setLight(l->adj_fog_color());
 688 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 689 //         current__view->get_world_up(),
 690 //         current__view->getLongitude_deg(),
 691 //         current__view->getLatitude_deg(),
 692 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 693 //         delta_time_sec);
 694
 695     // OSGFIXME
 696 //     sgEnviro.drawLightning();
 697
 698 //        double current_view_origin_airspeed_horiz_kt =
 699 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 700 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 701 //                                * SGD_DEGREES_TO_RADIANS);
 702
 703     // OSGFIXME
 704 //     if( is_internal )
 705 //         shadows->endOfFrame();
 706
 707     // need to call the update visitor once
 708     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 709     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 710                                 current__view->getViewOrientation());
 711     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 712     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 713                              l->scene_diffuse(), l->scene_specular(),
 714                              l->adj_fog_color(),
 715                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 716     mUpdateVisitor->setVisibility(actual_visibility);
 717     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 718     bool hotspots = fgGetBool("/sim/panel-hotspots");
 719     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 720     cullMask |= simgear::GroundLightManager::instance()
 721         ->getLightNodeMask(mUpdateVisitor.get());
 722     if (hotspots)
 723         cullMask |= simgear::PICK_BIT;
 724     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
 725 }
 726
 727
 728
 729 // options.cxx needs to see this for toggle_panel()
 730 // Handle new window size or exposure
 731 void
 732 FGRenderer::resize( int width, int height ) {
 733     int view_h;
 734
 735     if ( (!fgGetBool("/sim/virtual-cockpit"))
 736          && fgPanelVisible() && idle_state == 1000 ) {
 737         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 738                              globals->get_current_panel()->getYOffset()) / 768.0);
 739     } else {
 740         view_h = height;
 741     }
 742
 743     static int lastwidth = 0;
 744     static int lastheight = 0;
 745     if (width != lastwidth)
 746         fgSetInt("/sim/startup/xsize", lastwidth = width);
 747     if (height != lastheight)
 748         fgSetInt("/sim/startup/ysize", lastheight = height);
 749
 750     // for all views
 751     FGViewMgr *viewmgr = globals->get_viewmgr();
 752     if (viewmgr) {
 753       for ( int i = 0; i < viewmgr->size(); ++i ) {
 754         viewmgr->get_view(i)->
 755           set_aspect_ratio((float)view_h / (float)width);
 756       }
 757     }
 758 }
 759
 760 bool
 761 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 762                  const osgGA::GUIEventAdapter* ea)
 763 {
 764     // wipe out the return ...
 765     pickList.clear();
 766     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 767     Intersections intersections;
 768
 769     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 770         return false;
 771     for (Intersections::iterator hit = intersections.begin(),
 772              e = intersections.end();
 773          hit != e;
 774          ++hit) {
 775         const osg::NodePath& np = hit->nodePath;
 776         osg::NodePath::const_reverse_iterator npi;
 777         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 778             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 779             if (!ud)
 780                 continue;
 781             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 782                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 783                 if (!pickCallback)
 784                     continue;
 785                 SGSceneryPick sceneryPick;
 786                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
 787                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
 788                 sceneryPick.callback = pickCallback;
 789                 pickList.push_back(sceneryPick);
 790             }
 791         }
 792     }
 793     return !pickList.empty();
 794 }
 795
 796 void
 797 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
 798 {
 799     viewer = viewer_;
 800 }
 801
 802 void
 803 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
 804 {
 805     eventHandler = eventHandler_;
 806 }
 807
 808 void
 809 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 810 {
 811     mRealRoot->addChild(camera);
 812 }
 813
 814 bool
 815 fgDumpSceneGraphToFile(const char* filename)
 816 {
 817     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 818 }
 819
 820 bool
 821 fgDumpTerrainBranchToFile(const char* filename)
 822 {
 823     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 824                                  filename );
 825 }
 826
 827 // For debugging
 828 bool
 829 fgDumpNodeToFile(osg::Node* node, const char* filename)
 830 {
 831     return osgDB::writeNodeFile(*node, filename);
 832 }
 833
 834 namespace flightgear
 835 {
 836 using namespace osg;
 837
 838 class VisibleSceneInfoVistor : public NodeVisitor, CullStack
 839 {
 840 public:
 841     VisibleSceneInfoVistor()
 842         : NodeVisitor(CULL_VISITOR, TRAVERSE_ACTIVE_CHILDREN)
 843     {
 844         setCullingMode(CullSettings::SMALL_FEATURE_CULLING
 845                        | CullSettings::VIEW_FRUSTUM_CULLING);
 846         setComputeNearFarMode(CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 847     }
 848
 849     VisibleSceneInfoVistor(const VisibleSceneInfoVistor& rhs)
 850     {
 851     }
 852
 853     META_NodeVisitor("flightgear","VisibleSceneInfoVistor")
 854
 855     typedef std::map<const std::string,int> InfoMap;
 856
 857     void getNodeInfo(Node* node)
 858     {
 859         const char* typeName = typeid(*node).name();
 860         classInfo[typeName]++;
 861         const std::string& nodeName = node->getName();
 862         if (!nodeName.empty())
 863             nodeInfo[nodeName]++;
 864     }
 865
 866     void dumpInfo()
 867     {
 868         using namespace std;
 869         typedef vector<InfoMap::iterator> FreqVector;
 870         cout << "class info:\n";
 871         FreqVector classes;
 872         for (InfoMap::iterator itr = classInfo.begin(), end = classInfo.end();
 873              itr != end;
 874              ++itr)
 875             classes.push_back(itr);
 876         sort(classes.begin(), classes.end(), freqComp);
 877         for (FreqVector::iterator itr = classes.begin(), end = classes.end();
 878              itr != end;
 879              ++itr) {
 880             cout << (*itr)->first << " " << (*itr)->second << "\n";
 881         }
 882         cout << "\nnode info:\n";
 883         FreqVector nodes;
 884         for (InfoMap::iterator itr = nodeInfo.begin(), end = nodeInfo.end();
 885              itr != end;
 886              ++itr)
 887             nodes.push_back(itr);
 888
 889         sort (nodes.begin(), nodes.end(), freqComp);
 890         for (FreqVector::iterator itr = nodes.begin(), end = nodes.end();
 891              itr != end;
 892              ++itr) {
 893             cout << (*itr)->first << " " << (*itr)->second << "\n";
 894         }
 895         cout << endl;
 896     }
 897
 898     void doTraversal(Camera* camera, Node* root, Viewport* viewport)
 899     {
 900         ref_ptr<RefMatrix> projection
 901             = createOrReuseMatrix(camera->getProjectionMatrix());
 902         ref_ptr<RefMatrix> mv = createOrReuseMatrix(camera->getViewMatrix());
 903         if (!viewport)
 904             viewport = camera->getViewport();
 905         if (viewport)
 906             pushViewport(viewport);
 907         pushProjectionMatrix(projection.get());
 908         pushModelViewMatrix(mv.get(), Transform::ABSOLUTE_RF);
 909         root->accept(*this);
 910         popModelViewMatrix();
 911         popProjectionMatrix();
 912         if (viewport)
 913             popViewport();
 914         dumpInfo();
 915     }
 916
 917     void apply(Node& node)
 918     {
 919         if (isCulled(node))
 920             return;
 921         pushCurrentMask();
 922         getNodeInfo(&node);
 923         traverse(node);
 924         popCurrentMask();
 925     }
 926     void apply(Group& node)
 927     {
 928         if (isCulled(node))
 929             return;
 930         pushCurrentMask();
 931         getNodeInfo(&node);
 932         traverse(node);
 933         popCurrentMask();
 934     }
 935
 936     void apply(Transform& node)
 937     {
 938         if (isCulled(node))
 939             return;
 940         pushCurrentMask();
 941         ref_ptr<RefMatrix> matrix = createOrReuseMatrix(*getModelViewMatrix());
 942         node.computeLocalToWorldMatrix(*matrix,this);
 943         pushModelViewMatrix(matrix.get(), node.getReferenceFrame());
 944         getNodeInfo(&node);
 945         traverse(node);
 946         popModelViewMatrix();
 947         popCurrentMask();
 948     }
 949
 950     void apply(Camera& camera)
 951     {
 952         // Save current cull settings
 953         CullSettings saved_cull_settings(*this);
 954
 955         // set cull settings from this Camera
 956         setCullSettings(camera);
 957         // inherit the settings from above
 958         inheritCullSettings(saved_cull_settings, camera.getInheritanceMask());
 959
 960         // set the cull mask.
 961         unsigned int savedTraversalMask = getTraversalMask();
 962         bool mustSetCullMask = (camera.getInheritanceMask()
 963                                 & osg::CullSettings::CULL_MASK) == 0;
 964         if (mustSetCullMask)
 965             setTraversalMask(camera.getCullMask());
 966
 967         osg::RefMatrix* projection = 0;
 968         osg::RefMatrix* modelview = 0;
 969
 970         if (camera.getReferenceFrame()==osg::Transform::RELATIVE_RF) {
 971             if (camera.getTransformOrder()==osg::Camera::POST_MULTIPLY) {
 972                 projection = createOrReuseMatrix(*getProjectionMatrix()
 973                                                  *camera.getProjectionMatrix());
 974                 modelview = createOrReuseMatrix(*getModelViewMatrix()
 975                                                 * camera.getViewMatrix());
 976             }
 977             else {              // pre multiply
 978                 projection = createOrReuseMatrix(camera.getProjectionMatrix()
 979                                                  * (*getProjectionMatrix()));
 980                 modelview = createOrReuseMatrix(camera.getViewMatrix()
 981                                                 * (*getModelViewMatrix()));
 982             }
 983         } else {
 984             // an absolute reference frame
 985             projection = createOrReuseMatrix(camera.getProjectionMatrix());
 986             modelview = createOrReuseMatrix(camera.getViewMatrix());
 987         }
 988         if (camera.getViewport())
 989             pushViewport(camera.getViewport());
 990
 991         pushProjectionMatrix(projection);
 992         pushModelViewMatrix(modelview, camera.getReferenceFrame());
 993
 994         traverse(camera);
 995
 996         // restore the previous model view matrix.
 997         popModelViewMatrix();
 998
 999         // restore the previous model view matrix.
1000         popProjectionMatrix();
1001
1002         if (camera.getViewport()) popViewport();
1003
1004         // restore the previous traversal mask settings
1005         if (mustSetCullMask)
1006             setTraversalMask(savedTraversalMask);
1007
1008         // restore the previous cull settings
1009         setCullSettings(saved_cull_settings);
1010     }
1011
1012 protected:
1013     // sort in reverse
1014     static bool freqComp(const InfoMap::iterator& lhs, const InfoMap::iterator& rhs)
1015     {
1016         return lhs->second > rhs->second;
1017     }
1018     InfoMap classInfo;
1019     InfoMap nodeInfo;
1020 };
1021
1022 bool printVisibleSceneInfo(FGRenderer* renderer)
1023 {
1024     osgViewer::Viewer* viewer = renderer->getViewer();
1025     VisibleSceneInfoVistor vsv;
1026     Viewport* vp = 0;
1027     if (!viewer->getCamera()->getViewport() && viewer->getNumSlaves() > 0) {
1028         const View::Slave& slave = viewer->getSlave(0);
1029         vp = slave._camera->getViewport();
1030     }
1031     vsv.doTraversal(viewer->getCamera(), viewer->getSceneData(), vp);
1032     return true;
1033 }
1034 }
1035 // end of renderer.cxx
1036