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 <Time/light.hxx>
  86 #include <Time/light.hxx>
  87 #include <Cockpit/panel.hxx>
  88 #include <Model/panelnode.hxx>
  89 #include <Model/modelmgr.hxx>
  90 #include <Model/acmodel.hxx>
  91 #include <Scenery/scenery.hxx>
  92 #include <Scenery/redout.hxx>
  93 #include <GUI/new_gui.hxx>
  94 #include <Instrumentation/HUD/HUD.hxx>
  95 #include <Environment/precipitation_mgr.hxx>
  96
  97 #include "splash.hxx"
  98 #include "renderer.hxx"
  99 #include "main.hxx"
 100 #include "CameraGroup.hxx"
 101 #include "FGEventHandler.hxx"
 102 #include <Main/viewer.hxx>
 103 #include <Main/viewmgr.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   SGPropertyNode_ptr 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     HUD *hud = static_cast<HUD*>(globals->get_subsystem("hud"));
 213     hud->draw(state);
 214
 215     // update the panel subsystem
 216     if ( globals->get_current_panel() != NULL )
 217         globals->get_current_panel()->update(state);
 218     // We don't need a state here - can be safely removed when we can pick
 219     // correctly
 220     fgUpdate3DPanels();
 221
 222     glPopClientAttrib();
 223     glPopAttrib();
 224
 225   }
 226
 227   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 228   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 229
 230 private:
 231 };
 232
 233 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 234 public:
 235
 236   /**
 237    * @param isSun true if the light is the actual sun i.e., for
 238    * illuminating the moon.
 239    */
 240   FGLightSourceUpdateCallback(bool isSun = false) : _isSun(isSun) {}
 241   FGLightSourceUpdateCallback(const FGLightSourceUpdateCallback& nc,
 242                               const CopyOp& op)
 243     : NodeCallback(nc, op), _isSun(nc._isSun)
 244   {}
 245   META_Object(flightgear,FGLightSourceUpdateCallback);
 246
 247   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 248   {
 249     assert(dynamic_cast<osg::LightSource*>(node));
 250     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 251     osg::Light* light = lightSource->getLight();
 252
 253     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 254     if (_isSun) {
 255       light->setAmbient(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 256       light->setDiffuse(Vec4(1.0f, 1.0f, 1.0f, 1.0f));
 257       light->setSpecular(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 258     } else {
 259       light->setAmbient(toOsg(l->scene_ambient()));
 260       light->setDiffuse(toOsg(l->scene_diffuse()));
 261       light->setSpecular(toOsg(l->scene_specular()));
 262     }
 263     osg::Vec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 264     light->setPosition(position);
 265
 266     traverse(node, nv);
 267   }
 268 private:
 269   const bool _isSun;
 270 };
 271
 272 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 273 public:
 274   FGWireFrameModeUpdateCallback() :
 275     mWireframe(fgGetNode("/sim/rendering/wireframe", true))
 276   { }
 277   virtual void operator()(osg::StateAttribute* stateAttribute,
 278                           osg::NodeVisitor*)
 279   {
 280     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 281     osg::PolygonMode* polygonMode;
 282     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 283
 284     if (mWireframe->getBoolValue())
 285       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 286                            osg::PolygonMode::LINE);
 287     else
 288       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 289                            osg::PolygonMode::FILL);
 290   }
 291 private:
 292   SGPropertyNode_ptr mWireframe;
 293 };
 294
 295 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 296 public:
 297   FGLightModelUpdateCallback() :
 298     mHighlights(fgGetNode("/sim/rendering/specular-highlight", true))
 299   { }
 300   virtual void operator()(osg::StateAttribute* stateAttribute,
 301                           osg::NodeVisitor*)
 302   {
 303     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 304     osg::LightModel* lightModel;
 305     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 306
 307 #if 0
 308     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 309     lightModel->setAmbientIntensity(toOsg(l->scene_ambient());
 310 #else
 311     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 312 #endif
 313     lightModel->setTwoSided(true);
 314     lightModel->setLocalViewer(false);
 315
 316     if (mHighlights->getBoolValue()) {
 317       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 318     } else {
 319       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 320     }
 321   }
 322 private:
 323   SGPropertyNode_ptr mHighlights;
 324 };
 325
 326 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 327 public:
 328   FGFogEnableUpdateCallback() :
 329     mFogEnabled(fgGetNode("/sim/rendering/fog", true))
 330   { }
 331   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 332   {
 333     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 334       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 335     } else {
 336       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 337     }
 338   }
 339 private:
 340   SGPropertyNode_ptr mFogEnabled;
 341 };
 342
 343 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 344 public:
 345   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 346   {
 347     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 348     assert(dynamic_cast<osg::Fog*>(sa));
 349     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 350     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 351     fog->setMode(osg::Fog::EXP2);
 352     fog->setColor(toOsg(updateVisitor->getFogColor()));
 353     fog->setDensity(updateVisitor->getFogExp2Density());
 354   }
 355 };
 356
 357 // update callback for the switch node guarding that splash
 358 class FGScenerySwitchCallback : public osg::NodeCallback {
 359 public:
 360   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 361   {
 362     assert(dynamic_cast<osg::Switch*>(node));
 363     osg::Switch* sw = static_cast<osg::Switch*>(node);
 364
 365     bool enabled = scenery_enabled;
 366     sw->setValue(0, enabled);
 367     if (!enabled)
 368       return;
 369     traverse(node, nv);
 370   }
 371
 372   static bool scenery_enabled;
 373 };
 374
 375 bool FGScenerySwitchCallback::scenery_enabled = false;
 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    _splash_screen_active = true;
 394 }
 395
 396 FGRenderer::~FGRenderer()
 397 {
 398 #ifdef FG_JPEG_SERVER
 399    jpgRenderFrame = NULL;
 400 #endif
 401 }
 402
 403 // Initialize various GL/view parameters
 404 // XXX This should be called "preinit" or something, as it initializes
 405 // critical parts of the scene graph in addition to the splash screen.
 406 void
 407 FGRenderer::splashinit( void ) {
 408     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 409     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 410     mRealRoot->addChild(fgCreateSplashNode());
 411     mFrameStamp = viewer->getFrameStamp();
 412     // Scene doesn't seem to pass the frame stamp to the update
 413     // visitor automatically.
 414     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 415     viewer->setUpdateVisitor(mUpdateVisitor.get());
 416     fgSetDouble("/sim/startup/splash-alpha", 1.0);
 417 }
 418
 419 void
 420 FGRenderer::init( void )
 421 {
 422     _scenery_loaded   = fgGetNode("/sim/sceneryloaded", true);
 423     _scenery_override = fgGetNode("/sim/sceneryloaded-override", true);
 424     _panel_hotspots   = fgGetNode("/sim/panel-hotspots", true);
 425     _virtual_cockpit  = fgGetNode("/sim/virtual-cockpit", true);
 426
 427     _sim_delta_sec = fgGetNode("/sim/time/delta-sec", true);
 428
 429     _xsize         = fgGetNode("/sim/startup/xsize", true);
 430     _ysize         = fgGetNode("/sim/startup/ysize", true);
 431
 432     _skyblend             = fgGetNode("/sim/rendering/skyblend", true);
 433     _point_sprites        = fgGetNode("/sim/rendering/point-sprites", true);
 434     _enhanced_lighting    = fgGetNode("/sim/rendering/enhanced-lighting", true);
 435     _distance_attenuation = fgGetNode("/sim/rendering/distance-attenuation", true);
 436     _horizon_effect       = fgGetNode("/sim/rendering/horizon-effect", true);
 437     _textures             = fgGetNode("/sim/rendering/textures", true);
 438
 439     _altitude_ft = fgGetNode("/position/altitude-ft", true);
 440
 441     _cloud_status = fgGetNode("/environment/clouds/status", true);
 442     _visibility_m = fgGetNode("/environment/visibility-m", true);
 443
 444     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 445     osg::initNotifyLevel();
 446
 447     // The number of polygon-offset "units" to place between layers.  In
 448     // principle, one is supposed to be enough.  In practice, I find that
 449     // my hardware/driver requires many more.
 450     osg::PolygonOffset::setUnitsMultiplier(1);
 451     osg::PolygonOffset::setFactorMultiplier(1);
 452
 453     // Go full screen if requested ...
 454     if ( fgGetBool("/sim/startup/fullscreen") )
 455         fgOSFullScreen();
 456
 457     viewer->getCamera()
 458         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 459
 460     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 461
 462     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 463
 464     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 465     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 466
 467     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 468     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 469     stateSet->setAttribute(new osg::BlendFunc);
 470     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 471
 472     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 473
 474     // this will be set below
 475     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 476
 477     osg::Material* material = new osg::Material;
 478     stateSet->setAttribute(material);
 479
 480     stateSet->setTextureAttribute(0, new osg::TexEnv);
 481     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 482
 483     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 484     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 485     stateSet->setAttribute(hint);
 486     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 487     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 488     stateSet->setAttribute(hint);
 489     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 490     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 491     stateSet->setAttribute(hint);
 492     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 493     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 494     stateSet->setAttribute(hint);
 495     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 496     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 497     stateSet->setAttribute(hint);
 498
 499     osg::Group* sceneGroup = new osg::Group;
 500     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 501     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 502
 503     //sceneGroup->addChild(thesky->getCloudRoot());
 504
 505     stateSet = sceneGroup->getOrCreateStateSet();
 506     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 507
 508     // need to update the light on every frame
 509     // OSG LightSource objects are rather confusing. OSG only supports
 510     // the 10 lights specified by OpenGL itself; if more than one
 511     // LightSource in the scene graph have the same light number, it's
 512     // indeterminate which values will be used to render geometry that
 513     // has that light number enabled. Also, adding children to a
 514     // LightSource is just a shortcut for setting up a state set that
 515     // has the corresponding OpenGL light enabled: a LightSource will
 516     // affect geometry anywhere in the scene graph that has its light
 517     // number enabled in a state set.
 518     LightSource* lightSource = new LightSource;
 519     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
 520     // relative because of CameraView being just a clever transform node
 521     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 522     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 523     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 524     mRealRoot->addChild(lightSource);
 525     // we need a white diffuse light for the phase of the moon
 526     osg::LightSource* sunLight = new osg::LightSource;
 527     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
 528     sunLight->getLight()->setLightNum(1);
 529     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
 530     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 531     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
 532     // Hang a StateSet above the sky subgraph in order to turn off
 533     // light 0
 534     Group* skyGroup = new Group;
 535     StateSet* skySS = skyGroup->getOrCreateStateSet();
 536     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
 537     skyGroup->addChild(thesky->getPreRoot());
 538     sunLight->addChild(skyGroup);
 539     mRoot->addChild(sceneGroup);
 540     mRoot->addChild(sunLight);
 541     // Clouds are added to the scene graph later
 542     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 543     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 544     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 545     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 546
 547     // enable disable specular highlights.
 548     // is the place where we might plug in an other fragment shader ...
 549     osg::LightModel* lightModel = new osg::LightModel;
 550     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 551     stateSet->setAttribute(lightModel);
 552
 553     // switch to enable wireframe
 554     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 555     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 556     stateSet->setAttributeAndModes(polygonMode);
 557
 558     // scene fog handling
 559     osg::Fog* fog = new osg::Fog;
 560     fog->setUpdateCallback(new FGFogUpdateCallback);
 561     stateSet->setAttributeAndModes(fog);
 562     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 563
 564     // plug in the GUI
 565     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
 566     if (guiCamera) {
 567         osg::Geode* geode = new osg::Geode;
 568         geode->addDrawable(new SGPuDrawable);
 569         geode->addDrawable(new SGHUDAndPanelDrawable);
 570         guiCamera->addChild(geode);
 571     }
 572     osg::Switch* sw = new osg::Switch;
 573     sw->setUpdateCallback(new FGScenerySwitchCallback);
 574     sw->addChild(mRoot.get());
 575     mRealRoot->addChild(sw);
 576     // The clouds are attached directly to the scene graph root
 577     // because, in theory, they don't want the same default state set
 578     // as the rest of the scene. This may not be true in practice.
 579     mRealRoot->addChild(thesky->getCloudRoot());
 580     mRealRoot->addChild(FGCreateRedoutNode());
 581     // Attach empty program to the scene root so that shader programs
 582     // don't leak into state sets (effects) that shouldn't have one.
 583     stateSet = mRealRoot->getOrCreateStateSet();
 584     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
 585 }
 586
 587 void
 588 FGRenderer::update()
 589 {
 590     globals->get_renderer()->update(true);
 591 }
 592
 593 // Update all Visuals (redraws anything graphics related)
 594 void
 595 FGRenderer::update( bool refresh_camera_settings ) {
 596     if ((!_scenery_loaded.get())||
 597          !(_scenery_loaded->getBoolValue() ||
 598            _scenery_override->getBoolValue()))
 599     {
 600         // alas, first "update" is being called before "init"...
 601         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 602         _splash_screen_active = true;
 603         return;
 604     }
 605     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 606
 607     if (_splash_screen_active)
 608     {
 609         // Fade out the splash screen
 610         const double fade_time = 0.8;
 611         const double fade_steps_per_sec = 20;
 612         double delay_time = SGMiscd::min(fade_time/fade_steps_per_sec,
 613                                          (SGTimeStamp::now() - _splash_time).toSecs());
 614         _splash_time = SGTimeStamp::now();
 615         double sAlpha = fgGetDouble("/sim/startup/splash-alpha", 1.0);
 616         sAlpha -= SGMiscd::max(0.0,delay_time/fade_time);
 617         FGScenerySwitchCallback::scenery_enabled = (sAlpha<1.0);
 618         _splash_screen_active = (sAlpha > 0.0);
 619         fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 620     }
 621
 622     bool skyblend = _skyblend->getBoolValue();
 623     bool use_point_sprites = _point_sprites->getBoolValue();
 624     bool enhanced_lighting = _enhanced_lighting->getBoolValue();
 625     bool distance_attenuation = _distance_attenuation->getBoolValue();
 626
 627     // OSGFIXME
 628     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 629                                   distance_attenuation );
 630
 631     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 632
 633     // update fog params
 634     double actual_visibility;
 635     if (_cloud_status->getBoolValue()) {
 636         actual_visibility = thesky->get_visibility();
 637     } else {
 638         actual_visibility = _visibility_m->getDoubleValue();
 639     }
 640
 641     // idle_state is now 1000 meaning we've finished all our
 642     // initializations and are running the main loop, so this will
 643     // now work without seg faulting the system.
 644
 645     FGViewer *current__view = globals->get_current_view();
 646     // Force update of center dependent values ...
 647     current__view->set_dirty();
 648
 649     if ( refresh_camera_settings ) {
 650         // update view port
 651         resize( _xsize->getIntValue(),
 652                 _ysize->getIntValue() );
 653     }
 654     osg::Camera *camera = viewer->getCamera();
 655
 656     if ( skyblend ) {
 657
 658         if ( _textures->getBoolValue() ) {
 659             SGVec4f clearColor(l->adj_fog_color());
 660             camera->setClearColor(toOsg(clearColor));
 661         }
 662     } else {
 663         SGVec4f clearColor(l->sky_color());
 664         camera->setClearColor(toOsg(clearColor));
 665     }
 666
 667     // update fog params if visibility has changed
 668     double visibility_meters = _visibility_m->getDoubleValue();
 669     thesky->set_visibility(visibility_meters);
 670
 671     double altitude_m = _altitude_ft->getDoubleValue() * SG_FEET_TO_METER;
 672     thesky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
 673
 674     // update the sky dome
 675     if ( skyblend ) {
 676
 677         // The sun and moon distances are scaled down versions
 678         // of the actual distance to get both the moon and the sun
 679         // within the range of the far clip plane.
 680         // Moon distance:    384,467 kilometers
 681         // Sun distance: 150,000,000 kilometers
 682
 683         double sun_horiz_eff, moon_horiz_eff;
 684         if (_horizon_effect->getBoolValue()) {
 685             sun_horiz_eff
 686                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
 687                                              0.0),
 688                              0.33) / 3.0;
 689             moon_horiz_eff
 690                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
 691                                              0.0),
 692                              0.33)/3.0;
 693         } else {
 694            sun_horiz_eff = moon_horiz_eff = 1.0;
 695         }
 696
 697         SGSkyState sstate;
 698         sstate.pos       = current__view->getViewPosition();
 699         sstate.pos_geod  = current__view->getPosition();
 700         sstate.ori       = current__view->getViewOrientation();
 701         sstate.spin      = l->get_sun_rotation();
 702         sstate.gst       = globals->get_time_params()->getGst();
 703         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 704         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 705         sstate.sun_angle = l->get_sun_angle();
 706
 707         SGSkyColor scolor;
 708         scolor.sky_color   = SGVec3f(l->sky_color().data());
 709         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
 710         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 711         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 712         scolor.sun_angle   = l->get_sun_angle();
 713         scolor.moon_angle  = l->get_moon_angle();
 714
 715         double delta_time_sec = _sim_delta_sec->getDoubleValue();
 716         thesky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
 717         thesky->repaint( scolor, *globals->get_ephem() );
 718
 719             //OSGFIXME
 720 //         shadows->setupShadows(
 721 //           current__view->getLongitude_deg(),
 722 //           current__view->getLatitude_deg(),
 723 //           globals->get_time_params()->getGst(),
 724 //           globals->get_ephem()->getSunRightAscension(),
 725 //           globals->get_ephem()->getSunDeclination(),
 726 //           l->get_sun_angle());
 727
 728     }
 729
 730 //     sgEnviro.setLight(l->adj_fog_color());
 731 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 732 //         current__view->get_world_up(),
 733 //         current__view->getLongitude_deg(),
 734 //         current__view->getLatitude_deg(),
 735 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 736 //         delta_time_sec);
 737
 738     // OSGFIXME
 739 //     sgEnviro.drawLightning();
 740
 741 //        double current_view_origin_airspeed_horiz_kt =
 742 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 743 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 744 //                                * SGD_DEGREES_TO_RADIANS);
 745
 746     // OSGFIXME
 747 //     if( is_internal )
 748 //         shadows->endOfFrame();
 749
 750     // need to call the update visitor once
 751     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 752     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 753                                 current__view->getViewOrientation());
 754     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 755     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 756                              l->scene_diffuse(), l->scene_specular(),
 757                              l->adj_fog_color(),
 758                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 759     mUpdateVisitor->setVisibility(actual_visibility);
 760     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 761     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 762     cullMask |= simgear::GroundLightManager::instance()
 763         ->getLightNodeMask(mUpdateVisitor.get());
 764     if (_panel_hotspots->getBoolValue())
 765         cullMask |= simgear::PICK_BIT;
 766     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
 767 }
 768
 769
 770
 771 // options.cxx needs to see this for toggle_panel()
 772 // Handle new window size or exposure
 773 void
 774 FGRenderer::resize( int width, int height ) {
 775     int view_h;
 776
 777     if ( (!_virtual_cockpit->getBoolValue())
 778          && fgPanelVisible() && idle_state == 1000 ) {
 779         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 780                              globals->get_current_panel()->getYOffset()) / 768.0);
 781     } else {
 782         view_h = height;
 783     }
 784
 785     static int lastwidth = 0;
 786     static int lastheight = 0;
 787     if (width != lastwidth)
 788         _xsize->setIntValue(lastwidth = width);
 789     if (height != lastheight)
 790         _ysize->setIntValue(lastheight = height);
 791
 792     // for all views
 793     FGViewMgr *viewmgr = globals->get_viewmgr();
 794     if (viewmgr) {
 795       for ( int i = 0; i < viewmgr->size(); ++i ) {
 796         viewmgr->get_view(i)->
 797           set_aspect_ratio((float)view_h / (float)width);
 798       }
 799     }
 800 }
 801
 802 bool
 803 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 804                  const osgGA::GUIEventAdapter* ea)
 805 {
 806     // wipe out the return ...
 807     pickList.clear();
 808     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 809     Intersections intersections;
 810
 811     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 812         return false;
 813     for (Intersections::iterator hit = intersections.begin(),
 814              e = intersections.end();
 815          hit != e;
 816          ++hit) {
 817         const osg::NodePath& np = hit->nodePath;
 818         osg::NodePath::const_reverse_iterator npi;
 819         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 820             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 821             if (!ud)
 822                 continue;
 823             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 824                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 825                 if (!pickCallback)
 826                     continue;
 827                 SGSceneryPick sceneryPick;
 828                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
 829                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
 830                 sceneryPick.callback = pickCallback;
 831                 pickList.push_back(sceneryPick);
 832             }
 833         }
 834     }
 835     return !pickList.empty();
 836 }
 837
 838 void
 839 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
 840 {
 841     viewer = viewer_;
 842 }
 843
 844 void
 845 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
 846 {
 847     eventHandler = eventHandler_;
 848 }
 849
 850 void
 851 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 852 {
 853     mRealRoot->addChild(camera);
 854 }
 855
 856 bool
 857 fgDumpSceneGraphToFile(const char* filename)
 858 {
 859     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 860 }
 861
 862 bool
 863 fgDumpTerrainBranchToFile(const char* filename)
 864 {
 865     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 866                                  filename );
 867 }
 868
 869 // For debugging
 870 bool
 871 fgDumpNodeToFile(osg::Node* node, const char* filename)
 872 {
 873     return osgDB::writeNodeFile(*node, filename);
 874 }
 875
 876 namespace flightgear
 877 {
 878 using namespace osg;
 879
 880 class VisibleSceneInfoVistor : public NodeVisitor, CullStack
 881 {
 882 public:
 883     VisibleSceneInfoVistor()
 884         : NodeVisitor(CULL_VISITOR, TRAVERSE_ACTIVE_CHILDREN)
 885     {
 886         setCullingMode(CullSettings::SMALL_FEATURE_CULLING
 887                        | CullSettings::VIEW_FRUSTUM_CULLING);
 888         setComputeNearFarMode(CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 889     }
 890
 891     VisibleSceneInfoVistor(const VisibleSceneInfoVistor& rhs)
 892     {
 893     }
 894
 895     META_NodeVisitor("flightgear","VisibleSceneInfoVistor")
 896
 897     typedef std::map<const std::string,int> InfoMap;
 898
 899     void getNodeInfo(Node* node)
 900     {
 901         const char* typeName = typeid(*node).name();
 902         classInfo[typeName]++;
 903         const std::string& nodeName = node->getName();
 904         if (!nodeName.empty())
 905             nodeInfo[nodeName]++;
 906     }
 907
 908     void dumpInfo()
 909     {
 910         using namespace std;
 911         typedef vector<InfoMap::iterator> FreqVector;
 912         cout << "class info:\n";
 913         FreqVector classes;
 914         for (InfoMap::iterator itr = classInfo.begin(), end = classInfo.end();
 915              itr != end;
 916              ++itr)
 917             classes.push_back(itr);
 918         sort(classes.begin(), classes.end(), freqComp);
 919         for (FreqVector::iterator itr = classes.begin(), end = classes.end();
 920              itr != end;
 921              ++itr) {
 922             cout << (*itr)->first << " " << (*itr)->second << "\n";
 923         }
 924         cout << "\nnode info:\n";
 925         FreqVector nodes;
 926         for (InfoMap::iterator itr = nodeInfo.begin(), end = nodeInfo.end();
 927              itr != end;
 928              ++itr)
 929             nodes.push_back(itr);
 930
 931         sort (nodes.begin(), nodes.end(), freqComp);
 932         for (FreqVector::iterator itr = nodes.begin(), end = nodes.end();
 933              itr != end;
 934              ++itr) {
 935             cout << (*itr)->first << " " << (*itr)->second << "\n";
 936         }
 937         cout << endl;
 938     }
 939
 940     void doTraversal(Camera* camera, Node* root, Viewport* viewport)
 941     {
 942         ref_ptr<RefMatrix> projection
 943             = createOrReuseMatrix(camera->getProjectionMatrix());
 944         ref_ptr<RefMatrix> mv = createOrReuseMatrix(camera->getViewMatrix());
 945         if (!viewport)
 946             viewport = camera->getViewport();
 947         if (viewport)
 948             pushViewport(viewport);
 949         pushProjectionMatrix(projection.get());
 950         pushModelViewMatrix(mv.get(), Transform::ABSOLUTE_RF);
 951         root->accept(*this);
 952         popModelViewMatrix();
 953         popProjectionMatrix();
 954         if (viewport)
 955             popViewport();
 956         dumpInfo();
 957     }
 958
 959     void apply(Node& node)
 960     {
 961         if (isCulled(node))
 962             return;
 963         pushCurrentMask();
 964         getNodeInfo(&node);
 965         traverse(node);
 966         popCurrentMask();
 967     }
 968     void apply(Group& node)
 969     {
 970         if (isCulled(node))
 971             return;
 972         pushCurrentMask();
 973         getNodeInfo(&node);
 974         traverse(node);
 975         popCurrentMask();
 976     }
 977
 978     void apply(Transform& node)
 979     {
 980         if (isCulled(node))
 981             return;
 982         pushCurrentMask();
 983         ref_ptr<RefMatrix> matrix = createOrReuseMatrix(*getModelViewMatrix());
 984         node.computeLocalToWorldMatrix(*matrix,this);
 985         pushModelViewMatrix(matrix.get(), node.getReferenceFrame());
 986         getNodeInfo(&node);
 987         traverse(node);
 988         popModelViewMatrix();
 989         popCurrentMask();
 990     }
 991
 992     void apply(Camera& camera)
 993     {
 994         // Save current cull settings
 995         CullSettings saved_cull_settings(*this);
 996
 997         // set cull settings from this Camera
 998         setCullSettings(camera);
 999         // inherit the settings from above
1000         inheritCullSettings(saved_cull_settings, camera.getInheritanceMask());
1001
1002         // set the cull mask.
1003         unsigned int savedTraversalMask = getTraversalMask();
1004         bool mustSetCullMask = (camera.getInheritanceMask()
1005                                 & osg::CullSettings::CULL_MASK) == 0;
1006         if (mustSetCullMask)
1007             setTraversalMask(camera.getCullMask());
1008
1009         osg::RefMatrix* projection = 0;
1010         osg::RefMatrix* modelview = 0;
1011
1012         if (camera.getReferenceFrame()==osg::Transform::RELATIVE_RF) {
1013             if (camera.getTransformOrder()==osg::Camera::POST_MULTIPLY) {
1014                 projection = createOrReuseMatrix(*getProjectionMatrix()
1015                                                  *camera.getProjectionMatrix());
1016                 modelview = createOrReuseMatrix(*getModelViewMatrix()
1017                                                 * camera.getViewMatrix());
1018             }
1019             else {              // pre multiply
1020                 projection = createOrReuseMatrix(camera.getProjectionMatrix()
1021                                                  * (*getProjectionMatrix()));
1022                 modelview = createOrReuseMatrix(camera.getViewMatrix()
1023                                                 * (*getModelViewMatrix()));
1024             }
1025         } else {
1026             // an absolute reference frame
1027             projection = createOrReuseMatrix(camera.getProjectionMatrix());
1028             modelview = createOrReuseMatrix(camera.getViewMatrix());
1029         }
1030         if (camera.getViewport())
1031             pushViewport(camera.getViewport());
1032
1033         pushProjectionMatrix(projection);
1034         pushModelViewMatrix(modelview, camera.getReferenceFrame());
1035
1036         traverse(camera);
1037
1038         // restore the previous model view matrix.
1039         popModelViewMatrix();
1040
1041         // restore the previous model view matrix.
1042         popProjectionMatrix();
1043
1044         if (camera.getViewport()) popViewport();
1045
1046         // restore the previous traversal mask settings
1047         if (mustSetCullMask)
1048             setTraversalMask(savedTraversalMask);
1049
1050         // restore the previous cull settings
1051         setCullSettings(saved_cull_settings);
1052     }
1053
1054 protected:
1055     // sort in reverse
1056     static bool freqComp(const InfoMap::iterator& lhs, const InfoMap::iterator& rhs)
1057     {
1058         return lhs->second > rhs->second;
1059     }
1060     InfoMap classInfo;
1061     InfoMap nodeInfo;
1062 };
1063
1064 bool printVisibleSceneInfo(FGRenderer* renderer)
1065 {
1066     osgViewer::Viewer* viewer = renderer->getViewer();
1067     VisibleSceneInfoVistor vsv;
1068     Viewport* vp = 0;
1069     if (!viewer->getCamera()->getViewport() && viewer->getNumSlaves() > 0) {
1070         const View::Slave& slave = viewer->getSlave(0);
1071         vp = slave._camera->getViewport();
1072     }
1073     vsv.doTraversal(viewer->getCamera(), viewer->getSceneData(), vp);
1074     return true;
1075 }
1076 }
1077 // end of renderer.cxx
1078