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/Version>
  51 #include <osg/TexEnv>
  52
  53 #include <osgUtil/LineSegmentIntersector>
  54
  55 #include <osg/io_utils>
  56 #include <osgDB/WriteFile>
  57
  58 #include <simgear/math/SGMath.hxx>
  59 #include <simgear/screen/extensions.hxx>
  60 #include <simgear/scene/material/matlib.hxx>
  61 #include <simgear/scene/model/animation.hxx>
  62 #include <simgear/scene/model/placement.hxx>
  63 #include <simgear/scene/sky/sky.hxx>
  64 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  65 #include <simgear/scene/util/RenderConstants.hxx>
  66 #include <simgear/scene/util/SGSceneUserData.hxx>
  67 #include <simgear/scene/tgdb/GroundLightManager.hxx>
  68 #include <simgear/scene/tgdb/pt_lights.hxx>
  69 #include <simgear/structure/OSGUtils.hxx>
  70 #include <simgear/props/props.hxx>
  71 #include <simgear/timing/sg_time.hxx>
  72 #include <simgear/ephemeris/ephemeris.hxx>
  73 #include <simgear/math/sg_random.h>
  74 #ifdef FG_JPEG_SERVER
  75 #include <simgear/screen/jpgfactory.hxx>
  76 #endif
  77
  78 #include <simgear/environment/visual_enviro.hxx>
  79
  80 #include <Time/light.hxx>
  81 #include <Time/light.hxx>
  82 #include <Aircraft/aircraft.hxx>
  83 #include <Cockpit/panel.hxx>
  84 #include <Cockpit/cockpit.hxx>
  85 #include <Cockpit/hud.hxx>
  86 #include <Model/panelnode.hxx>
  87 #include <Model/modelmgr.hxx>
  88 #include <Model/acmodel.hxx>
  89 #include <Scenery/scenery.hxx>
  90 #include <Scenery/redout.hxx>
  91 #include <Scenery/tilemgr.hxx>
  92 #include <GUI/new_gui.hxx>
  93 #include <Instrumentation/instrument_mgr.hxx>
  94 #include <Instrumentation/HUD/HUD.hxx>
  95 #include <Environment/precipitation_mgr.hxx>
  96
  97 #include <Include/general.hxx>
  98 #include "splash.hxx"
  99 #include "renderer.hxx"
 100 #include "main.hxx"
 101 #include "CameraGroup.hxx"
 102 #include "FGEventHandler.hxx"
 103 #include <Main/viewer.hxx>
 104
 105 using namespace osg;
 106 using namespace simgear;
 107 using namespace flightgear;
 108
 109 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 110 public:
 111   FGHintUpdateCallback(const char* configNode) :
 112     mConfigNode(fgGetNode(configNode, true))
 113   { }
 114   virtual void operator()(osg::StateAttribute* stateAttribute,
 115                           osg::NodeVisitor*)
 116   {
 117     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 118     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 119
 120     const char* value = mConfigNode->getStringValue();
 121     if (!value)
 122       hint->setMode(GL_DONT_CARE);
 123     else if (0 == strcmp(value, "nicest"))
 124       hint->setMode(GL_NICEST);
 125     else if (0 == strcmp(value, "fastest"))
 126       hint->setMode(GL_FASTEST);
 127     else
 128       hint->setMode(GL_DONT_CARE);
 129   }
 130 private:
 131   SGSharedPtr<SGPropertyNode> mConfigNode;
 132 };
 133
 134
 135 class SGPuDrawable : public osg::Drawable {
 136 public:
 137   SGPuDrawable()
 138   {
 139     // Dynamic stuff, do not store geometry
 140     setUseDisplayList(false);
 141     setDataVariance(Object::DYNAMIC);
 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     setDataVariance(Object::DYNAMIC);
 188
 189     osg::StateSet* stateSet = getOrCreateStateSet();
 190     stateSet->setRenderBinDetails(1000, "RenderBin");
 191
 192     // speed optimization?
 193     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 194     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 195     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 196     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 197     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 198
 199     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 200   }
 201   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 202   { drawImplementation(*renderInfo.getState()); }
 203   void drawImplementation(osg::State& state) const
 204   {
 205     state.setActiveTextureUnit(0);
 206     state.setClientActiveTextureUnit(0);
 207     state.disableAllVertexArrays();
 208
 209     glPushAttrib(GL_ALL_ATTRIB_BITS);
 210     glPushClientAttrib(~0u);
 211
 212     fgCockpitUpdate(&state);
 213
 214     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 215     HUD *hud = static_cast<HUD*>(instr->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 }
 558
 559
 560 // Update all Visuals (redraws anything graphics related)
 561 void
 562 FGRenderer::update( bool refresh_camera_settings ) {
 563     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 564                           || fgGetBool("sim/sceneryloaded-override");
 565     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 566     if ( idle_state < 1000 || !scenery_loaded ) {
 567         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 568
 569         // Keep resetting sim time while the sim is initializing
 570         // the splash screen is now in the scenegraph
 571         globals->set_sim_time_sec( 0.0 );
 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     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 629                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 630                         / (double)fgGetInt("/sim/model-hz") );
 631
 632     // update the sky dome
 633     if ( skyblend ) {
 634
 635         // The sun and moon distances are scaled down versions
 636         // of the actual distance to get both the moon and the sun
 637         // within the range of the far clip plane.
 638         // Moon distance:    384,467 kilometers
 639         // Sun distance: 150,000,000 kilometers
 640
 641         double sun_horiz_eff, moon_horiz_eff;
 642         if (fgGetBool("/sim/rendering/horizon-effect")) {
 643             sun_horiz_eff
 644                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
 645                                              0.0),
 646                              0.33) / 3.0;
 647             moon_horiz_eff
 648                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
 649                                              0.0),
 650                              0.33)/3.0;
 651         } else {
 652            sun_horiz_eff = moon_horiz_eff = 1.0;
 653         }
 654
 655         SGSkyState sstate;
 656         sstate.pos       = current__view->getViewPosition();
 657         sstate.pos_geod  = current__view->getPosition();
 658         sstate.ori       = current__view->getViewOrientation();
 659         sstate.spin      = l->get_sun_rotation();
 660         sstate.gst       = globals->get_time_params()->getGst();
 661         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 662         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 663         sstate.sun_angle = l->get_sun_angle();
 664
 665         SGSkyColor scolor;
 666         scolor.sky_color   = SGVec3f(l->sky_color().data());
 667         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
 668         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 669         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 670         scolor.sun_angle   = l->get_sun_angle();
 671         scolor.moon_angle  = l->get_moon_angle();
 672
 673         thesky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
 674         thesky->repaint( scolor, *globals->get_ephem() );
 675
 676         /*
 677         SG_LOG( SG_GENERAL, SG_BULK,
 678                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 679          << view_pos[1] << " " << view_pos[2] );
 680         SG_LOG( SG_GENERAL, SG_BULK,
 681                 "    zero_elev = " << zero_elev[0] << " "
 682          << zero_elev[1] << " " << zero_elev[2]
 683          << " lon = " << cur_fdm_state->get_Longitude()
 684          << " lat = " << cur_fdm_state->get_Latitude() );
 685         SG_LOG( SG_GENERAL, SG_BULK,
 686                 "    sun_rot = " << l->get_sun_rotation
 687          << " gst = " << SGTime::cur_time_params->getGst() );
 688         SG_LOG( SG_GENERAL, SG_BULK,
 689              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 690           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 691           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 692           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 693         */
 694
 695         //OSGFIXME
 696 //         shadows->setupShadows(
 697 //           current__view->getLongitude_deg(),
 698 //           current__view->getLatitude_deg(),
 699 //           globals->get_time_params()->getGst(),
 700 //           globals->get_ephem()->getSunRightAscension(),
 701 //           globals->get_ephem()->getSunDeclination(),
 702 //           l->get_sun_angle());
 703
 704     }
 705
 706 //     sgEnviro.setLight(l->adj_fog_color());
 707 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 708 //         current__view->get_world_up(),
 709 //         current__view->getLongitude_deg(),
 710 //         current__view->getLatitude_deg(),
 711 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 712 //         delta_time_sec);
 713
 714     // OSGFIXME
 715 //     sgEnviro.drawLightning();
 716
 717 //        double current_view_origin_airspeed_horiz_kt =
 718 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 719 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 720 //                                * SGD_DEGREES_TO_RADIANS);
 721
 722     // OSGFIXME
 723 //     if( is_internal )
 724 //         shadows->endOfFrame();
 725
 726     // need to call the update visitor once
 727     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 728     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 729                                 current__view->getViewOrientation());
 730     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 731     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 732                              l->scene_diffuse(), l->scene_specular(),
 733                              l->adj_fog_color(),
 734                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 735     mUpdateVisitor->setVisibility(actual_visibility);
 736     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 737     bool hotspots = fgGetBool("/sim/panel-hotspots");
 738     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 739     cullMask |= simgear::GroundLightManager::instance()
 740         ->getLightNodeMask(mUpdateVisitor.get());
 741     if (hotspots)
 742         cullMask |= simgear::PICK_BIT;
 743     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
 744 }
 745
 746
 747
 748 // options.cxx needs to see this for toggle_panel()
 749 // Handle new window size or exposure
 750 void
 751 FGRenderer::resize( int width, int height ) {
 752     int view_h;
 753
 754     if ( (!fgGetBool("/sim/virtual-cockpit"))
 755          && fgPanelVisible() && idle_state == 1000 ) {
 756         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 757                              globals->get_current_panel()->getYOffset()) / 768.0);
 758     } else {
 759         view_h = height;
 760     }
 761
 762     static int lastwidth = 0;
 763     static int lastheight = 0;
 764     if (width != lastwidth)
 765         fgSetInt("/sim/startup/xsize", lastwidth = width);
 766     if (height != lastheight)
 767         fgSetInt("/sim/startup/ysize", lastheight = height);
 768
 769     // for all views
 770     FGViewMgr *viewmgr = globals->get_viewmgr();
 771     if (viewmgr) {
 772       for ( int i = 0; i < viewmgr->size(); ++i ) {
 773         viewmgr->get_view(i)->
 774           set_aspect_ratio((float)view_h / (float)width);
 775       }
 776     }
 777 }
 778
 779 bool
 780 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 781                  const osgGA::GUIEventAdapter* ea)
 782 {
 783     // wipe out the return ...
 784     pickList.clear();
 785     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 786     Intersections intersections;
 787
 788     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 789         return false;
 790     for (Intersections::iterator hit = intersections.begin(),
 791              e = intersections.end();
 792          hit != e;
 793          ++hit) {
 794         const osg::NodePath& np = hit->nodePath;
 795         osg::NodePath::const_reverse_iterator npi;
 796         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 797             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 798             if (!ud)
 799                 continue;
 800             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 801                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 802                 if (!pickCallback)
 803                     continue;
 804                 SGSceneryPick sceneryPick;
 805                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
 806                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
 807                 sceneryPick.callback = pickCallback;
 808                 pickList.push_back(sceneryPick);
 809             }
 810         }
 811     }
 812     return !pickList.empty();
 813 }
 814
 815 void
 816 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
 817 {
 818     viewer = viewer_;
 819 }
 820
 821 void
 822 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
 823 {
 824     eventHandler = eventHandler_;
 825 }
 826
 827 void
 828 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 829 {
 830     mRealRoot->addChild(camera);
 831 }
 832
 833 bool
 834 fgDumpSceneGraphToFile(const char* filename)
 835 {
 836     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 837 }
 838
 839 bool
 840 fgDumpTerrainBranchToFile(const char* filename)
 841 {
 842     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 843                                  filename );
 844 }
 845
 846 // For debugging
 847 bool
 848 fgDumpNodeToFile(osg::Node* node, const char* filename)
 849 {
 850     return osgDB::writeNodeFile(*node, filename);
 851 }
 852 // end of renderer.cxx
 853