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 #include <Environment/environment_mgr.hxx>
  97
  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 #include <Main/viewmgr.hxx>
 105
 106 using namespace osg;
 107 using namespace simgear;
 108 using namespace flightgear;
 109
 110 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 111 public:
 112   FGHintUpdateCallback(const char* configNode) :
 113     mConfigNode(fgGetNode(configNode, true))
 114   { }
 115   virtual void operator()(osg::StateAttribute* stateAttribute,
 116                           osg::NodeVisitor*)
 117   {
 118     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 119     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 120
 121     const char* value = mConfigNode->getStringValue();
 122     if (!value)
 123       hint->setMode(GL_DONT_CARE);
 124     else if (0 == strcmp(value, "nicest"))
 125       hint->setMode(GL_NICEST);
 126     else if (0 == strcmp(value, "fastest"))
 127       hint->setMode(GL_FASTEST);
 128     else
 129       hint->setMode(GL_DONT_CARE);
 130   }
 131 private:
 132   SGPropertyNode_ptr mConfigNode;
 133 };
 134
 135
 136 class SGPuDrawable : public osg::Drawable {
 137 public:
 138   SGPuDrawable()
 139   {
 140     // Dynamic stuff, do not store geometry
 141     setUseDisplayList(false);
 142     setDataVariance(Object::DYNAMIC);
 143
 144     osg::StateSet* stateSet = getOrCreateStateSet();
 145     stateSet->setRenderBinDetails(1001, "RenderBin");
 146     // speed optimization?
 147     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 148     // We can do translucent menus, so why not. :-)
 149     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 150     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 151     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 152
 153     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 154
 155     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 156     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 157   }
 158   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 159   { drawImplementation(*renderInfo.getState()); }
 160   void drawImplementation(osg::State& state) const
 161   {
 162     state.setActiveTextureUnit(0);
 163     state.setClientActiveTextureUnit(0);
 164
 165     state.disableAllVertexArrays();
 166
 167     glPushAttrib(GL_ALL_ATTRIB_BITS);
 168     glPushClientAttrib(~0u);
 169
 170     puDisplay();
 171
 172     glPopClientAttrib();
 173     glPopAttrib();
 174   }
 175
 176   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 177   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 178
 179 private:
 180 };
 181
 182 class SGHUDAndPanelDrawable : public osg::Drawable {
 183 public:
 184   SGHUDAndPanelDrawable()
 185   {
 186     // Dynamic stuff, do not store geometry
 187     setUseDisplayList(false);
 188     setDataVariance(Object::DYNAMIC);
 189
 190     osg::StateSet* stateSet = getOrCreateStateSet();
 191     stateSet->setRenderBinDetails(1000, "RenderBin");
 192
 193     // speed optimization?
 194     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 195     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 196     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 197     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 198     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 199
 200     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 201   }
 202   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 203   { drawImplementation(*renderInfo.getState()); }
 204   void drawImplementation(osg::State& state) const
 205   {
 206     state.setActiveTextureUnit(0);
 207     state.setClientActiveTextureUnit(0);
 208     state.disableAllVertexArrays();
 209
 210     glPushAttrib(GL_ALL_ATTRIB_BITS);
 211     glPushClientAttrib(~0u);
 212
 213     HUD *hud = static_cast<HUD*>(globals->get_subsystem("hud"));
 214     hud->draw(state);
 215
 216     // update the panel subsystem
 217     if ( globals->get_current_panel() != NULL )
 218         globals->get_current_panel()->update(state);
 219     // We don't need a state here - can be safely removed when we can pick
 220     // correctly
 221     fgUpdate3DPanels();
 222
 223     glPopClientAttrib();
 224     glPopAttrib();
 225
 226   }
 227
 228   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 229   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 230
 231 private:
 232 };
 233
 234 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 235 public:
 236
 237   /**
 238    * @param isSun true if the light is the actual sun i.e., for
 239    * illuminating the moon.
 240    */
 241   FGLightSourceUpdateCallback(bool isSun = false) : _isSun(isSun) {}
 242   FGLightSourceUpdateCallback(const FGLightSourceUpdateCallback& nc,
 243                               const CopyOp& op)
 244     : NodeCallback(nc, op), _isSun(nc._isSun)
 245   {}
 246   META_Object(flightgear,FGLightSourceUpdateCallback);
 247
 248   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 249   {
 250     assert(dynamic_cast<osg::LightSource*>(node));
 251     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 252     osg::Light* light = lightSource->getLight();
 253
 254     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 255     if (_isSun) {
 256       light->setAmbient(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 257       light->setDiffuse(Vec4(1.0f, 1.0f, 1.0f, 1.0f));
 258       light->setSpecular(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 259     } else {
 260       light->setAmbient(toOsg(l->scene_ambient()));
 261       light->setDiffuse(toOsg(l->scene_diffuse()));
 262       light->setSpecular(toOsg(l->scene_specular()));
 263     }
 264     osg::Vec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 265     light->setPosition(position);
 266
 267     traverse(node, nv);
 268   }
 269 private:
 270   const bool _isSun;
 271 };
 272
 273 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 274 public:
 275   FGWireFrameModeUpdateCallback() :
 276     mWireframe(fgGetNode("/sim/rendering/wireframe", true))
 277   { }
 278   virtual void operator()(osg::StateAttribute* stateAttribute,
 279                           osg::NodeVisitor*)
 280   {
 281     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 282     osg::PolygonMode* polygonMode;
 283     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 284
 285     if (mWireframe->getBoolValue())
 286       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 287                            osg::PolygonMode::LINE);
 288     else
 289       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 290                            osg::PolygonMode::FILL);
 291   }
 292 private:
 293   SGPropertyNode_ptr mWireframe;
 294 };
 295
 296 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 297 public:
 298   FGLightModelUpdateCallback() :
 299     mHighlights(fgGetNode("/sim/rendering/specular-highlight", true))
 300   { }
 301   virtual void operator()(osg::StateAttribute* stateAttribute,
 302                           osg::NodeVisitor*)
 303   {
 304     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 305     osg::LightModel* lightModel;
 306     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 307
 308 #if 0
 309     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 310     lightModel->setAmbientIntensity(toOsg(l->scene_ambient());
 311 #else
 312     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 313 #endif
 314     lightModel->setTwoSided(true);
 315     lightModel->setLocalViewer(false);
 316
 317     if (mHighlights->getBoolValue()) {
 318       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 319     } else {
 320       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 321     }
 322   }
 323 private:
 324   SGPropertyNode_ptr mHighlights;
 325 };
 326
 327 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 328 public:
 329   FGFogEnableUpdateCallback() :
 330     mFogEnabled(fgGetNode("/sim/rendering/fog", true))
 331   { }
 332   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 333   {
 334     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 335       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 336     } else {
 337       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 338     }
 339   }
 340 private:
 341   SGPropertyNode_ptr mFogEnabled;
 342 };
 343
 344 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 345 public:
 346   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 347   {
 348     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 349     assert(dynamic_cast<osg::Fog*>(sa));
 350     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 351     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 352     fog->setMode(osg::Fog::EXP2);
 353     fog->setColor(toOsg(updateVisitor->getFogColor()));
 354     fog->setDensity(updateVisitor->getFogExp2Density());
 355   }
 356 };
 357
 358 // update callback for the switch node guarding that splash
 359 class FGScenerySwitchCallback : public osg::NodeCallback {
 360 public:
 361   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 362   {
 363     assert(dynamic_cast<osg::Switch*>(node));
 364     osg::Switch* sw = static_cast<osg::Switch*>(node);
 365
 366     bool enabled = scenery_enabled;
 367     sw->setValue(0, enabled);
 368     if (!enabled)
 369       return;
 370     traverse(node, nv);
 371   }
 372
 373   static bool scenery_enabled;
 374 };
 375
 376 bool FGScenerySwitchCallback::scenery_enabled = false;
 377
 378 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 379 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 380
 381 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 382
 383 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 384
 385 #ifdef FG_JPEG_SERVER
 386 static void updateRenderer()
 387 {
 388     globals->get_renderer()->update();
 389 }
 390 #endif
 391
 392 FGRenderer::FGRenderer() :
 393     _sky(NULL)
 394 {
 395 #ifdef FG_JPEG_SERVER
 396    jpgRenderFrame = updateRenderer;
 397 #endif
 398    eventHandler = new FGEventHandler;
 399 }
 400
 401 FGRenderer::~FGRenderer()
 402 {
 403 #ifdef FG_JPEG_SERVER
 404    jpgRenderFrame = NULL;
 405 #endif
 406     delete _sky;
 407 }
 408
 409 // Initialize various GL/view parameters
 410 // XXX This should be called "preinit" or something, as it initializes
 411 // critical parts of the scene graph in addition to the splash screen.
 412 void
 413 FGRenderer::splashinit( void ) {
 414     osgViewer::Viewer* viewer = getViewer();
 415     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 416     mRealRoot->addChild(fgCreateSplashNode());
 417     mFrameStamp = viewer->getFrameStamp();
 418     // Scene doesn't seem to pass the frame stamp to the update
 419     // visitor automatically.
 420     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 421     viewer->setUpdateVisitor(mUpdateVisitor.get());
 422     fgSetDouble("/sim/startup/splash-alpha", 1.0);
 423 }
 424
 425 void
 426 FGRenderer::init( void )
 427 {
 428     _scenery_loaded   = fgGetNode("/sim/sceneryloaded", true);
 429     _scenery_override = fgGetNode("/sim/sceneryloaded-override", true);
 430     _panel_hotspots   = fgGetNode("/sim/panel-hotspots", true);
 431     _virtual_cockpit  = fgGetNode("/sim/virtual-cockpit", true);
 432
 433     _sim_delta_sec = fgGetNode("/sim/time/delta-sec", true);
 434
 435     _xsize         = fgGetNode("/sim/startup/xsize", true);
 436     _ysize         = fgGetNode("/sim/startup/ysize", true);
 437     _splash_alpha  = fgGetNode("/sim/startup/splash-alpha", true);
 438
 439     _skyblend             = fgGetNode("/sim/rendering/skyblend", true);
 440     _point_sprites        = fgGetNode("/sim/rendering/point-sprites", true);
 441     _enhanced_lighting    = fgGetNode("/sim/rendering/enhanced-lighting", true);
 442     _distance_attenuation = fgGetNode("/sim/rendering/distance-attenuation", true);
 443     _horizon_effect       = fgGetNode("/sim/rendering/horizon-effect", true);
 444     _textures             = fgGetNode("/sim/rendering/textures", true);
 445
 446     _altitude_ft = fgGetNode("/position/altitude-ft", true);
 447
 448     _cloud_status = fgGetNode("/environment/clouds/status", true);
 449     _visibility_m = fgGetNode("/environment/visibility-m", true);
 450
 451     bool use_point_sprites = _point_sprites->getBoolValue();
 452     bool enhanced_lighting = _enhanced_lighting->getBoolValue();
 453     bool distance_attenuation = _distance_attenuation->getBoolValue();
 454
 455     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 456                                   distance_attenuation );
 457
 458 // create sky, but can't build until setupView, since we depend
 459 // on other subsystems to be inited, eg Ephemeris
 460     _sky = new SGSky;
 461
 462     SGPath texture_path(globals->get_fg_root());
 463     texture_path.append("Textures");
 464     texture_path.append("Sky");
 465     for (int i = 0; i < FGEnvironmentMgr::MAX_CLOUD_LAYERS; i++) {
 466         SGCloudLayer * layer = new SGCloudLayer(texture_path.str());
 467         _sky->add_cloud_layer(layer);
 468     }
 469
 470     _sky->texture_path( texture_path.str() );
 471 }
 472
 473 void
 474 FGRenderer::setupView( void )
 475 {
 476     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 477     osg::initNotifyLevel();
 478
 479     // The number of polygon-offset "units" to place between layers.  In
 480     // principle, one is supposed to be enough.  In practice, I find that
 481     // my hardware/driver requires many more.
 482     osg::PolygonOffset::setUnitsMultiplier(1);
 483     osg::PolygonOffset::setFactorMultiplier(1);
 484
 485     // Go full screen if requested ...
 486     if ( fgGetBool("/sim/startup/fullscreen") )
 487         fgOSFullScreen();
 488
 489 // build the sky
 490     // The sun and moon diameters are scaled down numbers of the
 491     // actual diameters. This was needed to fit both the sun and the
 492     // moon within the distance to the far clip plane.
 493     // Moon diameter:    3,476 kilometers
 494     // Sun diameter: 1,390,000 kilometers
 495     _sky->build( 80000.0, 80000.0,
 496                   463.3, 361.8,
 497                   *globals->get_ephem(),
 498                   fgGetNode("/environment", true));
 499
 500     viewer->getCamera()
 501         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 502
 503     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 504
 505     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 506
 507     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 508     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 509
 510     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 511     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 512     stateSet->setAttribute(new osg::BlendFunc);
 513     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 514
 515     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 516
 517     // this will be set below
 518     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 519
 520     osg::Material* material = new osg::Material;
 521     stateSet->setAttribute(material);
 522
 523     stateSet->setTextureAttribute(0, new osg::TexEnv);
 524     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 525
 526     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 527     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 528     stateSet->setAttribute(hint);
 529     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 530     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 531     stateSet->setAttribute(hint);
 532     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 533     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 534     stateSet->setAttribute(hint);
 535     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 536     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 537     stateSet->setAttribute(hint);
 538     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 539     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 540     stateSet->setAttribute(hint);
 541
 542     osg::Group* sceneGroup = new osg::Group;
 543     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 544     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 545
 546     //sceneGroup->addChild(thesky->getCloudRoot());
 547
 548     stateSet = sceneGroup->getOrCreateStateSet();
 549     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 550
 551     // need to update the light on every frame
 552     // OSG LightSource objects are rather confusing. OSG only supports
 553     // the 10 lights specified by OpenGL itself; if more than one
 554     // LightSource in the scene graph have the same light number, it's
 555     // indeterminate which values will be used to render geometry that
 556     // has that light number enabled. Also, adding children to a
 557     // LightSource is just a shortcut for setting up a state set that
 558     // has the corresponding OpenGL light enabled: a LightSource will
 559     // affect geometry anywhere in the scene graph that has its light
 560     // number enabled in a state set.
 561     LightSource* lightSource = new LightSource;
 562     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
 563     // relative because of CameraView being just a clever transform node
 564     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 565     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 566     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 567     mRealRoot->addChild(lightSource);
 568     // we need a white diffuse light for the phase of the moon
 569     osg::LightSource* sunLight = new osg::LightSource;
 570     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
 571     sunLight->getLight()->setLightNum(1);
 572     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
 573     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 574     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
 575
 576     // Hang a StateSet above the sky subgraph in order to turn off
 577     // light 0
 578     Group* skyGroup = new Group;
 579     StateSet* skySS = skyGroup->getOrCreateStateSet();
 580     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
 581     skyGroup->addChild(_sky->getPreRoot());
 582     sunLight->addChild(skyGroup);
 583     mRoot->addChild(sceneGroup);
 584     mRoot->addChild(sunLight);
 585
 586     // Clouds are added to the scene graph later
 587     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 588     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 589     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 590     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 591
 592     // enable disable specular highlights.
 593     // is the place where we might plug in an other fragment shader ...
 594     osg::LightModel* lightModel = new osg::LightModel;
 595     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 596     stateSet->setAttribute(lightModel);
 597
 598     // switch to enable wireframe
 599     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 600     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 601     stateSet->setAttributeAndModes(polygonMode);
 602
 603     // scene fog handling
 604     osg::Fog* fog = new osg::Fog;
 605     fog->setUpdateCallback(new FGFogUpdateCallback);
 606     stateSet->setAttributeAndModes(fog);
 607     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 608
 609     // plug in the GUI
 610     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
 611     if (guiCamera) {
 612         osg::Geode* geode = new osg::Geode;
 613         geode->addDrawable(new SGPuDrawable);
 614         geode->addDrawable(new SGHUDAndPanelDrawable);
 615         guiCamera->addChild(geode);
 616     }
 617     osg::Switch* sw = new osg::Switch;
 618     sw->setUpdateCallback(new FGScenerySwitchCallback);
 619     sw->addChild(mRoot.get());
 620     mRealRoot->addChild(sw);
 621     // The clouds are attached directly to the scene graph root
 622     // because, in theory, they don't want the same default state set
 623     // as the rest of the scene. This may not be true in practice.
 624     mRealRoot->addChild(_sky->getCloudRoot());
 625     mRealRoot->addChild(FGCreateRedoutNode());
 626     // Attach empty program to the scene root so that shader programs
 627     // don't leak into state sets (effects) that shouldn't have one.
 628     stateSet = mRealRoot->getOrCreateStateSet();
 629     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
 630 }
 631
 632 // Update all Visuals (redraws anything graphics related)
 633 void
 634 FGRenderer::update( ) {
 635     if (!(_scenery_loaded->getBoolValue() ||
 636            _scenery_override->getBoolValue()))
 637     {
 638         _splash_alpha->setDoubleValue(1.0);
 639         return;
 640     }
 641     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 642
 643     if (_splash_alpha->getDoubleValue()>0.0)
 644     {
 645         // Fade out the splash screen
 646         const double fade_time = 0.8;
 647         const double fade_steps_per_sec = 20;
 648         double delay_time = SGMiscd::min(fade_time/fade_steps_per_sec,
 649                                          (SGTimeStamp::now() - _splash_time).toSecs());
 650         _splash_time = SGTimeStamp::now();
 651         double sAlpha = _splash_alpha->getDoubleValue();
 652         sAlpha -= SGMiscd::max(0.0,delay_time/fade_time);
 653         FGScenerySwitchCallback::scenery_enabled = (sAlpha<1.0);
 654         _splash_alpha->setDoubleValue(sAlpha);
 655     }
 656
 657 #if 0 // OSGFIXME
 658     // OSGFIXME: features no longer available or no longer run-time configurable
 659     {
 660         bool use_point_sprites = _point_sprites->getBoolValue();
 661         bool enhanced_lighting = _enhanced_lighting->getBoolValue();
 662         bool distance_attenuation = _distance_attenuation->getBoolValue();
 663
 664         SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 665                                       distance_attenuation );
 666     }
 667 #endif
 668
 669     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 670
 671     // update fog params
 672     double actual_visibility;
 673     if (_cloud_status->getBoolValue()) {
 674         actual_visibility = _sky->get_visibility();
 675     } else {
 676         actual_visibility = _visibility_m->getDoubleValue();
 677     }
 678
 679     // idle_state is now 1000 meaning we've finished all our
 680     // initializations and are running the main loop, so this will
 681     // now work without seg faulting the system.
 682
 683     FGViewer *current__view = globals->get_current_view();
 684     // Force update of center dependent values ...
 685     current__view->set_dirty();
 686
 687     osg::Camera *camera = viewer->getCamera();
 688
 689     bool skyblend = _skyblend->getBoolValue();
 690     if ( skyblend ) {
 691
 692         if ( _textures->getBoolValue() ) {
 693             SGVec4f clearColor(l->adj_fog_color());
 694             camera->setClearColor(toOsg(clearColor));
 695         }
 696     } else {
 697         SGVec4f clearColor(l->sky_color());
 698         camera->setClearColor(toOsg(clearColor));
 699     }
 700
 701     // update fog params if visibility has changed
 702     double visibility_meters = _visibility_m->getDoubleValue();
 703     _sky->set_visibility(visibility_meters);
 704
 705     double altitude_m = _altitude_ft->getDoubleValue() * SG_FEET_TO_METER;
 706     _sky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
 707
 708     // update the sky dome
 709     if ( skyblend ) {
 710
 711         // The sun and moon distances are scaled down versions
 712         // of the actual distance to get both the moon and the sun
 713         // within the range of the far clip plane.
 714         // Moon distance:    384,467 kilometers
 715         // Sun distance: 150,000,000 kilometers
 716
 717         double sun_horiz_eff, moon_horiz_eff;
 718         if (_horizon_effect->getBoolValue()) {
 719             sun_horiz_eff
 720                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
 721                                              0.0),
 722                              0.33) / 3.0;
 723             moon_horiz_eff
 724                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
 725                                              0.0),
 726                              0.33)/3.0;
 727         } else {
 728            sun_horiz_eff = moon_horiz_eff = 1.0;
 729         }
 730
 731         SGSkyState sstate;
 732         sstate.pos       = current__view->getViewPosition();
 733         sstate.pos_geod  = current__view->getPosition();
 734         sstate.ori       = current__view->getViewOrientation();
 735         sstate.spin      = l->get_sun_rotation();
 736         sstate.gst       = globals->get_time_params()->getGst();
 737         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 738         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 739         sstate.sun_angle = l->get_sun_angle();
 740
 741         SGSkyColor scolor;
 742         scolor.sky_color   = SGVec3f(l->sky_color().data());
 743         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
 744         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 745         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 746         scolor.sun_angle   = l->get_sun_angle();
 747         scolor.moon_angle  = l->get_moon_angle();
 748
 749         double delta_time_sec = _sim_delta_sec->getDoubleValue();
 750         _sky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
 751         _sky->repaint( scolor, *globals->get_ephem() );
 752
 753             //OSGFIXME
 754 //         shadows->setupShadows(
 755 //           current__view->getLongitude_deg(),
 756 //           current__view->getLatitude_deg(),
 757 //           globals->get_time_params()->getGst(),
 758 //           globals->get_ephem()->getSunRightAscension(),
 759 //           globals->get_ephem()->getSunDeclination(),
 760 //           l->get_sun_angle());
 761
 762     }
 763
 764 //     sgEnviro.setLight(l->adj_fog_color());
 765 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 766 //         current__view->get_world_up(),
 767 //         current__view->getLongitude_deg(),
 768 //         current__view->getLatitude_deg(),
 769 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 770 //         delta_time_sec);
 771
 772     // OSGFIXME
 773 //     sgEnviro.drawLightning();
 774
 775 //        double current_view_origin_airspeed_horiz_kt =
 776 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 777 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 778 //                                * SGD_DEGREES_TO_RADIANS);
 779
 780     // OSGFIXME
 781 //     if( is_internal )
 782 //         shadows->endOfFrame();
 783
 784     // need to call the update visitor once
 785     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 786     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 787                                 current__view->getViewOrientation());
 788     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 789     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 790                              l->scene_diffuse(), l->scene_specular(),
 791                              l->adj_fog_color(),
 792                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 793     mUpdateVisitor->setVisibility(actual_visibility);
 794     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 795     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 796     cullMask |= simgear::GroundLightManager::instance()
 797         ->getLightNodeMask(mUpdateVisitor.get());
 798     if (_panel_hotspots->getBoolValue())
 799         cullMask |= simgear::PICK_BIT;
 800     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
 801 }
 802
 803 void
 804 FGRenderer::resize( int width, int height )
 805 {
 806     int curWidth = _xsize->getIntValue(),
 807         curHeight = _ysize->getIntValue();
 808     if ((curHeight != height) || (curWidth != width)) {
 809     // must guard setting these, or PLIB-PUI fails with too many live interfaces
 810         _xsize->setIntValue(width);
 811         _ysize->setIntValue(height);
 812     }
 813 }
 814
 815 bool
 816 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 817                  const osgGA::GUIEventAdapter* ea)
 818 {
 819     // wipe out the return ...
 820     pickList.clear();
 821     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 822     Intersections intersections;
 823
 824     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 825         return false;
 826     for (Intersections::iterator hit = intersections.begin(),
 827              e = intersections.end();
 828          hit != e;
 829          ++hit) {
 830         const osg::NodePath& np = hit->nodePath;
 831         osg::NodePath::const_reverse_iterator npi;
 832         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 833             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 834             if (!ud)
 835                 continue;
 836             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 837                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 838                 if (!pickCallback)
 839                     continue;
 840                 SGSceneryPick sceneryPick;
 841                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
 842                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
 843                 sceneryPick.callback = pickCallback;
 844                 pickList.push_back(sceneryPick);
 845             }
 846         }
 847     }
 848     return !pickList.empty();
 849 }
 850
 851 void
 852 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
 853 {
 854     viewer = viewer_;
 855 }
 856
 857 void
 858 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
 859 {
 860     eventHandler = eventHandler_;
 861 }
 862
 863 void
 864 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 865 {
 866     mRealRoot->addChild(camera);
 867 }
 868
 869 bool
 870 fgDumpSceneGraphToFile(const char* filename)
 871 {
 872     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 873 }
 874
 875 bool
 876 fgDumpTerrainBranchToFile(const char* filename)
 877 {
 878     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 879                                  filename );
 880 }
 881
 882 // For debugging
 883 bool
 884 fgDumpNodeToFile(osg::Node* node, const char* filename)
 885 {
 886     return osgDB::writeNodeFile(*node, filename);
 887 }
 888
 889 namespace flightgear
 890 {
 891 using namespace osg;
 892
 893 class VisibleSceneInfoVistor : public NodeVisitor, CullStack
 894 {
 895 public:
 896     VisibleSceneInfoVistor()
 897         : NodeVisitor(CULL_VISITOR, TRAVERSE_ACTIVE_CHILDREN)
 898     {
 899         setCullingMode(CullSettings::SMALL_FEATURE_CULLING
 900                        | CullSettings::VIEW_FRUSTUM_CULLING);
 901         setComputeNearFarMode(CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 902     }
 903
 904     VisibleSceneInfoVistor(const VisibleSceneInfoVistor& rhs)
 905     {
 906     }
 907
 908     META_NodeVisitor("flightgear","VisibleSceneInfoVistor")
 909
 910     typedef std::map<const std::string,int> InfoMap;
 911
 912     void getNodeInfo(Node* node)
 913     {
 914         const char* typeName = typeid(*node).name();
 915         classInfo[typeName]++;
 916         const std::string& nodeName = node->getName();
 917         if (!nodeName.empty())
 918             nodeInfo[nodeName]++;
 919     }
 920
 921     void dumpInfo()
 922     {
 923         using namespace std;
 924         typedef vector<InfoMap::iterator> FreqVector;
 925         cout << "class info:\n";
 926         FreqVector classes;
 927         for (InfoMap::iterator itr = classInfo.begin(), end = classInfo.end();
 928              itr != end;
 929              ++itr)
 930             classes.push_back(itr);
 931         sort(classes.begin(), classes.end(), freqComp);
 932         for (FreqVector::iterator itr = classes.begin(), end = classes.end();
 933              itr != end;
 934              ++itr) {
 935             cout << (*itr)->first << " " << (*itr)->second << "\n";
 936         }
 937         cout << "\nnode info:\n";
 938         FreqVector nodes;
 939         for (InfoMap::iterator itr = nodeInfo.begin(), end = nodeInfo.end();
 940              itr != end;
 941              ++itr)
 942             nodes.push_back(itr);
 943
 944         sort (nodes.begin(), nodes.end(), freqComp);
 945         for (FreqVector::iterator itr = nodes.begin(), end = nodes.end();
 946              itr != end;
 947              ++itr) {
 948             cout << (*itr)->first << " " << (*itr)->second << "\n";
 949         }
 950         cout << endl;
 951     }
 952
 953     void doTraversal(Camera* camera, Node* root, Viewport* viewport)
 954     {
 955         ref_ptr<RefMatrix> projection
 956             = createOrReuseMatrix(camera->getProjectionMatrix());
 957         ref_ptr<RefMatrix> mv = createOrReuseMatrix(camera->getViewMatrix());
 958         if (!viewport)
 959             viewport = camera->getViewport();
 960         if (viewport)
 961             pushViewport(viewport);
 962         pushProjectionMatrix(projection.get());
 963         pushModelViewMatrix(mv.get(), Transform::ABSOLUTE_RF);
 964         root->accept(*this);
 965         popModelViewMatrix();
 966         popProjectionMatrix();
 967         if (viewport)
 968             popViewport();
 969         dumpInfo();
 970     }
 971
 972     void apply(Node& node)
 973     {
 974         if (isCulled(node))
 975             return;
 976         pushCurrentMask();
 977         getNodeInfo(&node);
 978         traverse(node);
 979         popCurrentMask();
 980     }
 981     void apply(Group& node)
 982     {
 983         if (isCulled(node))
 984             return;
 985         pushCurrentMask();
 986         getNodeInfo(&node);
 987         traverse(node);
 988         popCurrentMask();
 989     }
 990
 991     void apply(Transform& node)
 992     {
 993         if (isCulled(node))
 994             return;
 995         pushCurrentMask();
 996         ref_ptr<RefMatrix> matrix = createOrReuseMatrix(*getModelViewMatrix());
 997         node.computeLocalToWorldMatrix(*matrix,this);
 998         pushModelViewMatrix(matrix.get(), node.getReferenceFrame());
 999         getNodeInfo(&node);
1000         traverse(node);
1001         popModelViewMatrix();
1002         popCurrentMask();
1003     }
1004
1005     void apply(Camera& camera)
1006     {
1007         // Save current cull settings
1008         CullSettings saved_cull_settings(*this);
1009
1010         // set cull settings from this Camera
1011         setCullSettings(camera);
1012         // inherit the settings from above
1013         inheritCullSettings(saved_cull_settings, camera.getInheritanceMask());
1014
1015         // set the cull mask.
1016         unsigned int savedTraversalMask = getTraversalMask();
1017         bool mustSetCullMask = (camera.getInheritanceMask()
1018                                 & osg::CullSettings::CULL_MASK) == 0;
1019         if (mustSetCullMask)
1020             setTraversalMask(camera.getCullMask());
1021
1022         osg::RefMatrix* projection = 0;
1023         osg::RefMatrix* modelview = 0;
1024
1025         if (camera.getReferenceFrame()==osg::Transform::RELATIVE_RF) {
1026             if (camera.getTransformOrder()==osg::Camera::POST_MULTIPLY) {
1027                 projection = createOrReuseMatrix(*getProjectionMatrix()
1028                                                  *camera.getProjectionMatrix());
1029                 modelview = createOrReuseMatrix(*getModelViewMatrix()
1030                                                 * camera.getViewMatrix());
1031             }
1032             else {              // pre multiply
1033                 projection = createOrReuseMatrix(camera.getProjectionMatrix()
1034                                                  * (*getProjectionMatrix()));
1035                 modelview = createOrReuseMatrix(camera.getViewMatrix()
1036                                                 * (*getModelViewMatrix()));
1037             }
1038         } else {
1039             // an absolute reference frame
1040             projection = createOrReuseMatrix(camera.getProjectionMatrix());
1041             modelview = createOrReuseMatrix(camera.getViewMatrix());
1042         }
1043         if (camera.getViewport())
1044             pushViewport(camera.getViewport());
1045
1046         pushProjectionMatrix(projection);
1047         pushModelViewMatrix(modelview, camera.getReferenceFrame());
1048
1049         traverse(camera);
1050
1051         // restore the previous model view matrix.
1052         popModelViewMatrix();
1053
1054         // restore the previous model view matrix.
1055         popProjectionMatrix();
1056
1057         if (camera.getViewport()) popViewport();
1058
1059         // restore the previous traversal mask settings
1060         if (mustSetCullMask)
1061             setTraversalMask(savedTraversalMask);
1062
1063         // restore the previous cull settings
1064         setCullSettings(saved_cull_settings);
1065     }
1066
1067 protected:
1068     // sort in reverse
1069     static bool freqComp(const InfoMap::iterator& lhs, const InfoMap::iterator& rhs)
1070     {
1071         return lhs->second > rhs->second;
1072     }
1073     InfoMap classInfo;
1074     InfoMap nodeInfo;
1075 };
1076
1077 bool printVisibleSceneInfo(FGRenderer* renderer)
1078 {
1079     osgViewer::Viewer* viewer = renderer->getViewer();
1080     VisibleSceneInfoVistor vsv;
1081     Viewport* vp = 0;
1082     if (!viewer->getCamera()->getViewport() && viewer->getNumSlaves() > 0) {
1083         const View::Slave& slave = viewer->getSlave(0);
1084         vp = slave._camera->getViewport();
1085     }
1086     vsv.doTraversal(viewer->getCamera(), viewer->getSceneData(), vp);
1087     return true;
1088 }
1089 }
1090 // end of renderer.cxx
1091