src/Main/renderer.cxx

   1 // renderer.cxx -- top level sim routines
   2 //
   3 // Written by Curtis Olson, started May 1997.
   4 // This file contains parts of main.cxx prior to october 2004
   5 //
   6 // Copyright (C) 1997 - 2002  Curtis L. Olson  - http://www.flightgear.org/~curt
   7 //
   8 // This program is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU General Public License as
  10 // published by the Free Software Foundation; either version 2 of the
  11 // License, or (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful, but
  14 // WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  21
  22 #ifdef HAVE_CONFIG_H
  23 #  include <config.h>
  24 #endif
  25
  26 #ifdef HAVE_WINDOWS_H
  27 #  include <windows.h>
  28 #endif
  29
  30 #include <simgear/compiler.h>
  31
  32 #include <osg/ref_ptr>
  33 #include <osg/AlphaFunc>
  34 #include <osg/BlendFunc>
  35 #include <osg/Camera>
  36 #include <osg/CullFace>
  37 #include <osg/Depth>
  38 #include <osg/Fog>
  39 #include <osg/Group>
  40 #include <osg/Hint>
  41 #include <osg/Light>
  42 #include <osg/LightModel>
  43 #include <osg/LightSource>
  44 #include <osg/Material>
  45 #include <osg/Math>
  46 #include <osg/NodeCallback>
  47 #include <osg/Notify>
  48 #include <osg/PolygonMode>
  49 #include <osg/PolygonOffset>
  50 #include <osg/Program>
  51 #include <osg/Version>
  52 #include <osg/TexEnv>
  53
  54 #include <osgUtil/LineSegmentIntersector>
  55
  56 #include <osg/io_utils>
  57 #include <osgDB/WriteFile>
  58
  59 #include <simgear/math/SGMath.hxx>
  60 #include <simgear/scene/material/matlib.hxx>
  61 #include <simgear/scene/model/animation.hxx>
  62 #include <simgear/scene/model/placement.hxx>
  63 #include <simgear/scene/sky/sky.hxx>
  64 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  65 #include <simgear/scene/util/RenderConstants.hxx>
  66 #include <simgear/scene/util/SGSceneUserData.hxx>
  67 #include <simgear/scene/tgdb/GroundLightManager.hxx>
  68 #include <simgear/scene/tgdb/pt_lights.hxx>
  69 #include <simgear/structure/OSGUtils.hxx>
  70 #include <simgear/props/props.hxx>
  71 #include <simgear/timing/sg_time.hxx>
  72 #include <simgear/ephemeris/ephemeris.hxx>
  73 #include <simgear/math/sg_random.h>
  74 #ifdef FG_JPEG_SERVER
  75 #include <simgear/screen/jpgfactory.hxx>
  76 #endif
  77
  78 #include <simgear/environment/visual_enviro.hxx>
  79
  80 #include <Time/light.hxx>
  81 #include <Time/light.hxx>
  82 #include <Cockpit/panel.hxx>
  83 #include <Model/panelnode.hxx>
  84 #include <Model/modelmgr.hxx>
  85 #include <Model/acmodel.hxx>
  86 #include <Scenery/scenery.hxx>
  87 #include <Scenery/redout.hxx>
  88 #include <Scenery/tilemgr.hxx>
  89 #include <GUI/new_gui.hxx>
  90 #include <Instrumentation/HUD/HUD.hxx>
  91 #include <Environment/precipitation_mgr.hxx>
  92
  93 #include "splash.hxx"
  94 #include "renderer.hxx"
  95 #include "main.hxx"
  96 #include "CameraGroup.hxx"
  97 #include "FGEventHandler.hxx"
  98 #include <Main/viewer.hxx>
  99 #include <Main/viewmgr.hxx>
 100
 101 using namespace osg;
 102 using namespace simgear;
 103 using namespace flightgear;
 104
 105 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 106 public:
 107   FGHintUpdateCallback(const char* configNode) :
 108     mConfigNode(fgGetNode(configNode, true))
 109   { }
 110   virtual void operator()(osg::StateAttribute* stateAttribute,
 111                           osg::NodeVisitor*)
 112   {
 113     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 114     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 115
 116     const char* value = mConfigNode->getStringValue();
 117     if (!value)
 118       hint->setMode(GL_DONT_CARE);
 119     else if (0 == strcmp(value, "nicest"))
 120       hint->setMode(GL_NICEST);
 121     else if (0 == strcmp(value, "fastest"))
 122       hint->setMode(GL_FASTEST);
 123     else
 124       hint->setMode(GL_DONT_CARE);
 125   }
 126 private:
 127   SGSharedPtr<SGPropertyNode> mConfigNode;
 128 };
 129
 130
 131 class SGPuDrawable : public osg::Drawable {
 132 public:
 133   SGPuDrawable()
 134   {
 135     // Dynamic stuff, do not store geometry
 136     setUseDisplayList(false);
 137     setDataVariance(Object::DYNAMIC);
 138
 139     osg::StateSet* stateSet = getOrCreateStateSet();
 140     stateSet->setRenderBinDetails(1001, "RenderBin");
 141     // speed optimization?
 142     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 143     // We can do translucent menus, so why not. :-)
 144     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 145     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 146     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 147
 148     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 149
 150     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 151     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 152   }
 153   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 154   { drawImplementation(*renderInfo.getState()); }
 155   void drawImplementation(osg::State& state) const
 156   {
 157     state.setActiveTextureUnit(0);
 158     state.setClientActiveTextureUnit(0);
 159
 160     state.disableAllVertexArrays();
 161
 162     glPushAttrib(GL_ALL_ATTRIB_BITS);
 163     glPushClientAttrib(~0u);
 164
 165     puDisplay();
 166
 167     glPopClientAttrib();
 168     glPopAttrib();
 169   }
 170
 171   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 172   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 173
 174 private:
 175 };
 176
 177 class SGHUDAndPanelDrawable : public osg::Drawable {
 178 public:
 179   SGHUDAndPanelDrawable()
 180   {
 181     // Dynamic stuff, do not store geometry
 182     setUseDisplayList(false);
 183     setDataVariance(Object::DYNAMIC);
 184
 185     osg::StateSet* stateSet = getOrCreateStateSet();
 186     stateSet->setRenderBinDetails(1000, "RenderBin");
 187
 188     // speed optimization?
 189     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 190     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 191     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 192     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 193     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 194
 195     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 196   }
 197   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 198   { drawImplementation(*renderInfo.getState()); }
 199   void drawImplementation(osg::State& state) const
 200   {
 201     state.setActiveTextureUnit(0);
 202     state.setClientActiveTextureUnit(0);
 203     state.disableAllVertexArrays();
 204
 205     glPushAttrib(GL_ALL_ATTRIB_BITS);
 206     glPushClientAttrib(~0u);
 207
 208     HUD *hud = static_cast<HUD*>(globals->get_subsystem("hud"));
 209     hud->draw(state);
 210
 211     // update the panel subsystem
 212     if ( globals->get_current_panel() != NULL )
 213         globals->get_current_panel()->update(state);
 214     // We don't need a state here - can be safely removed when we can pick
 215     // correctly
 216     fgUpdate3DPanels();
 217
 218     glPopClientAttrib();
 219     glPopAttrib();
 220
 221   }
 222
 223   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 224   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 225
 226 private:
 227 };
 228
 229 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 230 public:
 231
 232   /**
 233    * @param isSun true if the light is the actual sun i.e., for
 234    * illuminating the moon.
 235    */
 236   FGLightSourceUpdateCallback(bool isSun = false) : _isSun(isSun) {}
 237   FGLightSourceUpdateCallback(const FGLightSourceUpdateCallback& nc,
 238                               const CopyOp& op)
 239     : NodeCallback(nc, op), _isSun(nc._isSun)
 240   {}
 241   META_Object(flightgear,FGLightSourceUpdateCallback);
 242
 243   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 244   {
 245     assert(dynamic_cast<osg::LightSource*>(node));
 246     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 247     osg::Light* light = lightSource->getLight();
 248
 249     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 250     if (_isSun) {
 251       light->setAmbient(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 252       light->setDiffuse(Vec4(1.0f, 1.0f, 1.0f, 1.0f));
 253       light->setSpecular(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 254     } else {
 255       light->setAmbient(toOsg(l->scene_ambient()));
 256       light->setDiffuse(toOsg(l->scene_diffuse()));
 257       light->setSpecular(toOsg(l->scene_specular()));
 258     }
 259     osg::Vec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 260     light->setPosition(position);
 261
 262     traverse(node, nv);
 263   }
 264 private:
 265   const bool _isSun;
 266 };
 267
 268 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 269 public:
 270   FGWireFrameModeUpdateCallback() :
 271     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 272   { }
 273   virtual void operator()(osg::StateAttribute* stateAttribute,
 274                           osg::NodeVisitor*)
 275   {
 276     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 277     osg::PolygonMode* polygonMode;
 278     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 279
 280     if (mWireframe->getBoolValue())
 281       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 282                            osg::PolygonMode::LINE);
 283     else
 284       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 285                            osg::PolygonMode::FILL);
 286   }
 287 private:
 288   SGSharedPtr<SGPropertyNode> mWireframe;
 289 };
 290
 291 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 292 public:
 293   FGLightModelUpdateCallback() :
 294     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 295   { }
 296   virtual void operator()(osg::StateAttribute* stateAttribute,
 297                           osg::NodeVisitor*)
 298   {
 299     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 300     osg::LightModel* lightModel;
 301     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 302
 303 #if 0
 304     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 305     lightModel->setAmbientIntensity(toOsg(l->scene_ambient());
 306 #else
 307     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 308 #endif
 309     lightModel->setTwoSided(true);
 310     lightModel->setLocalViewer(false);
 311
 312     if (mHighlights->getBoolValue()) {
 313       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 314     } else {
 315       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 316     }
 317   }
 318 private:
 319   SGSharedPtr<SGPropertyNode> mHighlights;
 320 };
 321
 322 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 323 public:
 324   FGFogEnableUpdateCallback() :
 325     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 326   { }
 327   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 328   {
 329     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 330       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 331     } else {
 332       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 333     }
 334   }
 335 private:
 336   SGSharedPtr<SGPropertyNode> mFogEnabled;
 337 };
 338
 339 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 340 public:
 341   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 342   {
 343     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 344     assert(dynamic_cast<osg::Fog*>(sa));
 345     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 346     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 347     fog->setMode(osg::Fog::EXP2);
 348     fog->setColor(toOsg(updateVisitor->getFogColor()));
 349     fog->setDensity(updateVisitor->getFogExp2Density());
 350   }
 351 };
 352
 353 // update callback for the switch node guarding that splash
 354 class FGScenerySwitchCallback : public osg::NodeCallback {
 355 public:
 356   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 357   {
 358     assert(dynamic_cast<osg::Switch*>(node));
 359     osg::Switch* sw = static_cast<osg::Switch*>(node);
 360
 361     double t = globals->get_sim_time_sec();
 362     bool enabled = 0 < t;
 363     sw->setValue(0, enabled);
 364     if (!enabled)
 365       return;
 366     traverse(node, nv);
 367   }
 368 };
 369
 370 // Sky structures
 371 SGSky *thesky;
 372
 373 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 374 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 375
 376 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 377
 378 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 379
 380 FGRenderer::FGRenderer()
 381 {
 382 #ifdef FG_JPEG_SERVER
 383    jpgRenderFrame = FGRenderer::update;
 384 #endif
 385    eventHandler = new FGEventHandler;
 386 }
 387
 388 FGRenderer::~FGRenderer()
 389 {
 390 #ifdef FG_JPEG_SERVER
 391    jpgRenderFrame = NULL;
 392 #endif
 393 }
 394
 395 // Initialize various GL/view parameters
 396 // XXX This should be called "preinit" or something, as it initializes
 397 // critical parts of the scene graph in addition to the splash screen.
 398 void
 399 FGRenderer::splashinit( void ) {
 400     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 401     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 402     mRealRoot->addChild(fgCreateSplashNode());
 403     mFrameStamp = viewer->getFrameStamp();
 404     // Scene doesn't seem to pass the frame stamp to the update
 405     // visitor automatically.
 406     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 407     viewer->setUpdateVisitor(mUpdateVisitor.get());
 408 }
 409
 410 void
 411 FGRenderer::init( void )
 412 {
 413     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 414     osg::initNotifyLevel();
 415
 416     // The number of polygon-offset "units" to place between layers.  In
 417     // principle, one is supposed to be enough.  In practice, I find that
 418     // my hardware/driver requires many more.
 419     osg::PolygonOffset::setUnitsMultiplier(1);
 420     osg::PolygonOffset::setFactorMultiplier(1);
 421
 422     // Go full screen if requested ...
 423     if ( fgGetBool("/sim/startup/fullscreen") )
 424         fgOSFullScreen();
 425
 426     viewer->getCamera()
 427         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 428
 429     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 430
 431     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 432
 433     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 434     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 435
 436     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 437     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 438     stateSet->setAttribute(new osg::BlendFunc);
 439     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 440
 441     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 442
 443     // this will be set below
 444     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 445
 446     osg::Material* material = new osg::Material;
 447     stateSet->setAttribute(material);
 448
 449     stateSet->setTextureAttribute(0, new osg::TexEnv);
 450     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 451
 452     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 453     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 454     stateSet->setAttribute(hint);
 455     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 456     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 457     stateSet->setAttribute(hint);
 458     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 459     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 460     stateSet->setAttribute(hint);
 461     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 462     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 463     stateSet->setAttribute(hint);
 464     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 465     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 466     stateSet->setAttribute(hint);
 467
 468     osg::Group* sceneGroup = new osg::Group;
 469     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 470     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 471
 472     //sceneGroup->addChild(thesky->getCloudRoot());
 473
 474     stateSet = sceneGroup->getOrCreateStateSet();
 475     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 476
 477     // need to update the light on every frame
 478     // OSG LightSource objects are rather confusing. OSG only supports
 479     // the 10 lights specified by OpenGL itself; if more than one
 480     // LightSource in the scene graph have the same light number, it's
 481     // indeterminate which values will be used to render geometry that
 482     // has that light number enabled. Also, adding children to a
 483     // LightSource is just a shortcut for setting up a state set that
 484     // has the corresponding OpenGL light enabled: a LightSource will
 485     // affect geometry anywhere in the scene graph that has its light
 486     // number enabled in a state set.
 487     LightSource* lightSource = new LightSource;
 488     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
 489     // relative because of CameraView being just a clever transform node
 490     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 491     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 492     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 493     mRealRoot->addChild(lightSource);
 494     // we need a white diffuse light for the phase of the moon
 495     osg::LightSource* sunLight = new osg::LightSource;
 496     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
 497     sunLight->getLight()->setLightNum(1);
 498     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
 499     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 500     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
 501     // Hang a StateSet above the sky subgraph in order to turn off
 502     // light 0
 503     Group* skyGroup = new Group;
 504     StateSet* skySS = skyGroup->getOrCreateStateSet();
 505     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
 506     skyGroup->addChild(thesky->getPreRoot());
 507     sunLight->addChild(skyGroup);
 508     mRoot->addChild(sceneGroup);
 509     mRoot->addChild(sunLight);
 510     // Clouds are added to the scene graph later
 511     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 512     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 513     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 514     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 515
 516     // enable disable specular highlights.
 517     // is the place where we might plug in an other fragment shader ...
 518     osg::LightModel* lightModel = new osg::LightModel;
 519     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 520     stateSet->setAttribute(lightModel);
 521
 522     // switch to enable wireframe
 523     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 524     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 525     stateSet->setAttributeAndModes(polygonMode);
 526
 527     // scene fog handling
 528     osg::Fog* fog = new osg::Fog;
 529     fog->setUpdateCallback(new FGFogUpdateCallback);
 530     stateSet->setAttributeAndModes(fog);
 531     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 532
 533     // plug in the GUI
 534     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
 535     if (guiCamera) {
 536         osg::Geode* geode = new osg::Geode;
 537         geode->addDrawable(new SGPuDrawable);
 538         geode->addDrawable(new SGHUDAndPanelDrawable);
 539         guiCamera->addChild(geode);
 540     }
 541     osg::Switch* sw = new osg::Switch;
 542     sw->setUpdateCallback(new FGScenerySwitchCallback);
 543     sw->addChild(mRoot.get());
 544     mRealRoot->addChild(sw);
 545     // The clouds are attached directly to the scene graph root
 546     // because, in theory, they don't want the same default state set
 547     // as the rest of the scene. This may not be true in practice.
 548     mRealRoot->addChild(thesky->getCloudRoot());
 549     mRealRoot->addChild(FGCreateRedoutNode());
 550     // Attach empty program to the scene root so that shader programs
 551     // don't leak into state sets (effects) that shouldn't have one.
 552     stateSet = mRealRoot->getOrCreateStateSet();
 553     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
 554 }
 555
 556
 557 // Update all Visuals (redraws anything graphics related)
 558 void
 559 FGRenderer::update( bool refresh_camera_settings ) {
 560     bool scenery_loaded = fgGetBool("sim/sceneryloaded", false)
 561                           || fgGetBool("sim/sceneryloaded-override");
 562     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 563     if (!scenery_loaded) {
 564       fgSetDouble("/sim/startup/splash-alpha", 1.0);
 565       return;
 566     }
 567
 568     // Fade out the splash screen over the first three seconds.
 569     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 570     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 571
 572     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 573     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 574     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 575     bool distance_attenuation
 576         = fgGetBool("/sim/rendering/distance-attenuation");
 577     // OSGFIXME
 578     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 579                                   distance_attenuation );
 580
 581     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 582
 583     // update fog params
 584     double actual_visibility;
 585     if (fgGetBool("/environment/clouds/status")) {
 586         actual_visibility = thesky->get_visibility();
 587     } else {
 588         actual_visibility = fgGetDouble("/environment/visibility-m");
 589     }
 590
 591     // idle_state is now 1000 meaning we've finished all our
 592     // initializations and are running the main loop, so this will
 593     // now work without seg faulting the system.
 594
 595     FGViewer *current__view = globals->get_current_view();
 596     // Force update of center dependent values ...
 597     current__view->set_dirty();
 598
 599     if ( refresh_camera_settings ) {
 600         // update view port
 601         resize( fgGetInt("/sim/startup/xsize"),
 602                 fgGetInt("/sim/startup/ysize") );
 603     }
 604     osg::Camera *camera = viewer->getCamera();
 605
 606     if ( skyblend ) {
 607
 608         if ( fgGetBool("/sim/rendering/textures") ) {
 609             SGVec4f clearColor(l->adj_fog_color());
 610             camera->setClearColor(toOsg(clearColor));
 611         }
 612     } else {
 613         SGVec4f clearColor(l->sky_color());
 614         camera->setClearColor(toOsg(clearColor));
 615     }
 616
 617     // update fog params if visibility has changed
 618     double visibility_meters = fgGetDouble("/environment/visibility-m");
 619     thesky->set_visibility(visibility_meters);
 620
 621     double altitude_m = fgGetDouble("/position/altitude-ft") * SG_FEET_TO_METER;
 622     thesky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
 623
 624     // update the sky dome
 625     if ( skyblend ) {
 626
 627         // The sun and moon distances are scaled down versions
 628         // of the actual distance to get both the moon and the sun
 629         // within the range of the far clip plane.
 630         // Moon distance:    384,467 kilometers
 631         // Sun distance: 150,000,000 kilometers
 632
 633         double sun_horiz_eff, moon_horiz_eff;
 634         if (fgGetBool("/sim/rendering/horizon-effect")) {
 635             sun_horiz_eff
 636                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
 637                                              0.0),
 638                              0.33) / 3.0;
 639             moon_horiz_eff
 640                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
 641                                              0.0),
 642                              0.33)/3.0;
 643         } else {
 644            sun_horiz_eff = moon_horiz_eff = 1.0;
 645         }
 646
 647         SGSkyState sstate;
 648         sstate.pos       = current__view->getViewPosition();
 649         sstate.pos_geod  = current__view->getPosition();
 650         sstate.ori       = current__view->getViewOrientation();
 651         sstate.spin      = l->get_sun_rotation();
 652         sstate.gst       = globals->get_time_params()->getGst();
 653         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 654         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 655         sstate.sun_angle = l->get_sun_angle();
 656
 657         SGSkyColor scolor;
 658         scolor.sky_color   = SGVec3f(l->sky_color().data());
 659         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
 660         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 661         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 662         scolor.sun_angle   = l->get_sun_angle();
 663         scolor.moon_angle  = l->get_moon_angle();
 664
 665         double delta_time_sec = fgGetDouble("/sim/time/delta-sec");
 666         thesky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
 667         thesky->repaint( scolor, *globals->get_ephem() );
 668
 669             //OSGFIXME
 670 //         shadows->setupShadows(
 671 //           current__view->getLongitude_deg(),
 672 //           current__view->getLatitude_deg(),
 673 //           globals->get_time_params()->getGst(),
 674 //           globals->get_ephem()->getSunRightAscension(),
 675 //           globals->get_ephem()->getSunDeclination(),
 676 //           l->get_sun_angle());
 677
 678     }
 679
 680 //     sgEnviro.setLight(l->adj_fog_color());
 681 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 682 //         current__view->get_world_up(),
 683 //         current__view->getLongitude_deg(),
 684 //         current__view->getLatitude_deg(),
 685 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 686 //         delta_time_sec);
 687
 688     // OSGFIXME
 689 //     sgEnviro.drawLightning();
 690
 691 //        double current_view_origin_airspeed_horiz_kt =
 692 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 693 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 694 //                                * SGD_DEGREES_TO_RADIANS);
 695
 696     // OSGFIXME
 697 //     if( is_internal )
 698 //         shadows->endOfFrame();
 699
 700     // need to call the update visitor once
 701     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 702     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 703                                 current__view->getViewOrientation());
 704     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 705     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 706                              l->scene_diffuse(), l->scene_specular(),
 707                              l->adj_fog_color(),
 708                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 709     mUpdateVisitor->setVisibility(actual_visibility);
 710     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 711     bool hotspots = fgGetBool("/sim/panel-hotspots");
 712     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 713     cullMask |= simgear::GroundLightManager::instance()
 714         ->getLightNodeMask(mUpdateVisitor.get());
 715     if (hotspots)
 716         cullMask |= simgear::PICK_BIT;
 717     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
 718 }
 719
 720
 721
 722 // options.cxx needs to see this for toggle_panel()
 723 // Handle new window size or exposure
 724 void
 725 FGRenderer::resize( int width, int height ) {
 726     int view_h;
 727
 728     if ( (!fgGetBool("/sim/virtual-cockpit"))
 729          && fgPanelVisible() && idle_state == 1000 ) {
 730         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 731                              globals->get_current_panel()->getYOffset()) / 768.0);
 732     } else {
 733         view_h = height;
 734     }
 735
 736     static int lastwidth = 0;
 737     static int lastheight = 0;
 738     if (width != lastwidth)
 739         fgSetInt("/sim/startup/xsize", lastwidth = width);
 740     if (height != lastheight)
 741         fgSetInt("/sim/startup/ysize", lastheight = height);
 742
 743     // for all views
 744     FGViewMgr *viewmgr = globals->get_viewmgr();
 745     if (viewmgr) {
 746       for ( int i = 0; i < viewmgr->size(); ++i ) {
 747         viewmgr->get_view(i)->
 748           set_aspect_ratio((float)view_h / (float)width);
 749       }
 750     }
 751 }
 752
 753 bool
 754 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 755                  const osgGA::GUIEventAdapter* ea)
 756 {
 757     // wipe out the return ...
 758     pickList.clear();
 759     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 760     Intersections intersections;
 761
 762     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 763         return false;
 764     for (Intersections::iterator hit = intersections.begin(),
 765              e = intersections.end();
 766          hit != e;
 767          ++hit) {
 768         const osg::NodePath& np = hit->nodePath;
 769         osg::NodePath::const_reverse_iterator npi;
 770         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 771             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 772             if (!ud)
 773                 continue;
 774             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 775                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 776                 if (!pickCallback)
 777                     continue;
 778                 SGSceneryPick sceneryPick;
 779                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
 780                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
 781                 sceneryPick.callback = pickCallback;
 782                 pickList.push_back(sceneryPick);
 783             }
 784         }
 785     }
 786     return !pickList.empty();
 787 }
 788
 789 void
 790 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
 791 {
 792     viewer = viewer_;
 793 }
 794
 795 void
 796 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
 797 {
 798     eventHandler = eventHandler_;
 799 }
 800
 801 void
 802 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 803 {
 804     mRealRoot->addChild(camera);
 805 }
 806
 807 bool
 808 fgDumpSceneGraphToFile(const char* filename)
 809 {
 810     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 811 }
 812
 813 bool
 814 fgDumpTerrainBranchToFile(const char* filename)
 815 {
 816     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 817                                  filename );
 818 }
 819
 820 // For debugging
 821 bool
 822 fgDumpNodeToFile(osg::Node* node, const char* filename)
 823 {
 824     return osgDB::writeNodeFile(*node, filename);
 825 }
 826 // end of renderer.cxx
 827