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 // $Id$
  23
  24
  25 #ifdef HAVE_CONFIG_H
  26 #  include <config.h>
  27 #endif
  28
  29 #include <simgear/compiler.h>
  30
  31 #ifdef HAVE_WINDOWS_H
  32 #  include <windows.h>
  33 #endif
  34
  35 #include <osg/ref_ptr>
  36 #include <osg/AlphaFunc>
  37 #include <osg/BlendFunc>
  38 #include <osg/CameraNode>
  39 #include <osg/CameraView>
  40 #include <osg/CullFace>
  41 #include <osg/Depth>
  42 #include <osg/Fog>
  43 #include <osg/Group>
  44 #include <osg/Light>
  45 #include <osg/LightModel>
  46 #include <osg/LightSource>
  47 #include <osg/NodeCallback>
  48 #include <osg/Notify>
  49 #include <osg/MatrixTransform>
  50 #include <osg/Multisample>
  51 #include <osg/Point>
  52 #include <osg/PolygonMode>
  53 #include <osg/ShadeModel>
  54 #include <osg/TexEnv>
  55 #include <osg/TexEnvCombine>
  56 #include <osg/TexGen>
  57 #include <osg/TexMat>
  58 #include <osg/ColorMatrix>
  59
  60 #include <osgUtil/SceneView>
  61 #include <osgUtil/UpdateVisitor>
  62
  63 #include <osg/io_utils>
  64 #include <osgDB/WriteFile>
  65 #include <osgDB/ReadFile>
  66 #include <sstream>
  67
  68 #include <simgear/math/SGMath.hxx>
  69 #include <simgear/screen/extensions.hxx>
  70 #include <simgear/scene/material/matlib.hxx>
  71 #include <simgear/scene/model/animation.hxx>
  72 #include <simgear/scene/model/model.hxx>
  73 #include <simgear/scene/model/modellib.hxx>
  74 #include <simgear/scene/model/placement.hxx>
  75 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  76 #include <simgear/scene/tgdb/pt_lights.hxx>
  77 #include <simgear/props/props.hxx>
  78 #include <simgear/timing/sg_time.hxx>
  79 #include <simgear/ephemeris/ephemeris.hxx>
  80 #include <simgear/math/sg_random.h>
  81 #ifdef FG_JPEG_SERVER
  82 #include <simgear/screen/jpgfactory.hxx>
  83 #endif
  84
  85 #include <simgear/environment/visual_enviro.hxx>
  86
  87 #include <Scenery/tileentry.hxx>
  88 #include <Time/light.hxx>
  89 #include <Time/light.hxx>
  90 #include <Aircraft/aircraft.hxx>
  91 #include <Cockpit/panel.hxx>
  92 #include <Cockpit/cockpit.hxx>
  93 #include <Cockpit/hud.hxx>
  94 #include <Model/panelnode.hxx>
  95 #include <Model/modelmgr.hxx>
  96 #include <Model/acmodel.hxx>
  97 #include <Scenery/scenery.hxx>
  98 #include <Scenery/tilemgr.hxx>
  99 #include <ATC/ATCdisplay.hxx>
 100 #include <GUI/new_gui.hxx>
 101 #include <Instrumentation/instrument_mgr.hxx>
 102 #include <Instrumentation/HUD/HUD.hxx>
 103
 104 #include "splash.hxx"
 105 #include "renderer.hxx"
 106 #include "main.hxx"
 107
 108 class SGPuDrawable : public osg::Drawable {
 109 public:
 110   SGPuDrawable()
 111   {
 112     // Dynamic stuff, do not store geometry
 113     setUseDisplayList(false);
 114
 115     osg::StateSet* stateSet = getOrCreateStateSet();
 116     stateSet->setRenderBinDetails(1001, "RenderBin");
 117     // speed optimization?
 118     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 119     // We can do translucent menus, so why not. :-)
 120     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 121     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 122     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 123
 124     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 125     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 126   }
 127   virtual void drawImplementation(osg::State& state) const
 128   {
 129     state.pushStateSet(getStateSet());
 130     state.apply();
 131
 132
 133     if((fgGetBool("/sim/atc/enabled"))
 134        || (fgGetBool("/sim/ai-traffic/enabled")))
 135       globals->get_ATC_display()->update(delta_time_sec, state);
 136
 137
 138     puDisplay();
 139
 140     // Fade out the splash screen over the first three seconds.
 141     double t = globals->get_sim_time_sec();
 142     if (t <= 2.5) {
 143       glPushAttrib(GL_ALL_ATTRIB_BITS);
 144       glPushClientAttrib(~0u);
 145
 146       fgSplashUpdate((2.5 - t) / 2.5);
 147
 148       glPopClientAttrib();
 149       glPopAttrib();
 150     }
 151
 152     state.popStateSet();
 153   }
 154
 155   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 156   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 157
 158 private:
 159 };
 160
 161 class SGHUDAndPanelDrawable : public osg::Drawable {
 162 public:
 163   SGHUDAndPanelDrawable()
 164   {
 165     // Dynamic stuff, do not store geometry
 166     setUseDisplayList(false);
 167
 168     osg::StateSet* stateSet = getOrCreateStateSet();
 169     stateSet->setRenderBinDetails(1000, "RenderBin");
 170
 171     // speed optimization?
 172     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 173     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 174     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 175     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 176     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 177   }
 178   virtual void drawImplementation(osg::State& state) const
 179   {
 180     state.pushStateSet(getStateSet());
 181     state.apply();
 182
 183     glPushAttrib(GL_ALL_ATTRIB_BITS);
 184     glPushClientAttrib(~0u);
 185
 186     fgCockpitUpdate(&state);
 187
 188     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 189     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 190     hud->draw(state);
 191
 192     // update the panel subsystem
 193     if ( globals->get_current_panel() != NULL )
 194         globals->get_current_panel()->update(state);
 195     // We don't need a state here - can be safely removed when we can pick
 196     // correctly
 197     fgUpdate3DPanels();
 198
 199     glPopClientAttrib();
 200     glPopAttrib();
 201
 202     state.popStateSet();
 203   }
 204
 205   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 206   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 207
 208 private:
 209 };
 210
 211 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 212 public:
 213   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 214   {
 215     assert(dynamic_cast<osg::LightSource*>(node));
 216     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 217     osg::Light* light = lightSource->getLight();
 218
 219     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 220     light->setAmbient(l->scene_ambient().osg());
 221     light->setDiffuse(l->scene_diffuse().osg());
 222     light->setSpecular(l->scene_specular().osg());
 223     SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 224     light->setPosition(position.osg());
 225     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 226     light->setDirection(direction.osg());
 227     light->setSpotExponent(0);
 228     light->setSpotCutoff(180);
 229     light->setConstantAttenuation(1);
 230     light->setLinearAttenuation(0);
 231     light->setQuadraticAttenuation(0);
 232
 233     traverse(node, nv);
 234   }
 235 };
 236
 237 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 238 public:
 239   FGWireFrameModeUpdateCallback() :
 240     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 241   { }
 242   virtual void operator()(osg::StateAttribute* stateAttribute,
 243                           osg::NodeVisitor*)
 244   {
 245     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 246     osg::PolygonMode* polygonMode;
 247     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 248
 249     if (mWireframe->getBoolValue())
 250       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 251                            osg::PolygonMode::LINE);
 252     else
 253       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 254                            osg::PolygonMode::FILL);
 255   }
 256 private:
 257   SGSharedPtr<SGPropertyNode> mWireframe;
 258 };
 259
 260 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 261 public:
 262   FGLightModelUpdateCallback() :
 263     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 264   { }
 265   virtual void operator()(osg::StateAttribute* stateAttribute,
 266                           osg::NodeVisitor*)
 267   {
 268     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 269     osg::LightModel* lightModel;
 270     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 271
 272 #if 0
 273     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 274     lightModel->setAmbientIntensity(l->scene_ambient().osg());
 275 #else
 276     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 277 #endif
 278     lightModel->setTwoSided(true);
 279     lightModel->setLocalViewer(false);
 280
 281     if (mHighlights->getBoolValue()) {
 282       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 283     } else {
 284       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 285     }
 286   }
 287 private:
 288   SGSharedPtr<SGPropertyNode> mHighlights;
 289 };
 290
 291 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 292 public:
 293   FGFogEnableUpdateCallback() :
 294     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 295   { }
 296   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 297   {
 298     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 299       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 300     } else {
 301       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 302     }
 303   }
 304 private:
 305   SGSharedPtr<SGPropertyNode> mFogEnabled;
 306 };
 307
 308 // fog constants.  I'm a little nervous about putting actual code out
 309 // here but it seems to work (?)
 310 static const double m_log01 = -log( 0.01 );
 311 static const double sqrt_m_log01 = sqrt( m_log01 );
 312 static GLfloat fog_exp_density;
 313 static GLfloat fog_exp2_density;
 314 static GLfloat rwy_exp2_punch_through;
 315 static GLfloat taxi_exp2_punch_through;
 316 static GLfloat ground_exp2_punch_through;
 317
 318 // Sky structures
 319 SGSky *thesky;
 320
 321 static osg::ref_ptr<osgUtil::SceneView> sceneView = new osgUtil::SceneView;
 322 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 323 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 324
 325 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 326
 327 static osg::ref_ptr<osg::CameraView> mCameraView = new osg::CameraView;
 328 static osg::ref_ptr<osg::CameraNode> mBackGroundCamera = new osg::CameraNode;
 329 static osg::ref_ptr<osg::CameraNode> mSceneCamera = new osg::CameraNode;
 330
 331 static osg::ref_ptr<osg::Fog> mFog = new osg::Fog;
 332 static osg::ref_ptr<osg::Fog> mRunwayLightingFog = new osg::Fog;
 333 static osg::ref_ptr<osg::Fog> mTaxiLightingFog = new osg::Fog;
 334 static osg::ref_ptr<osg::Fog> mGroundLightingFog = new osg::Fog;
 335
 336 FGRenderer::FGRenderer()
 337 {
 338 #ifdef FG_JPEG_SERVER
 339    jpgRenderFrame = FGRenderer::update;
 340 #endif
 341 }
 342
 343 FGRenderer::~FGRenderer()
 344 {
 345 #ifdef FG_JPEG_SERVER
 346    jpgRenderFrame = NULL;
 347 #endif
 348 }
 349
 350 // Initialize various GL/view parameters
 351 void
 352 FGRenderer::init( void ) {
 353
 354     osg::initNotifyLevel();
 355
 356     // Go full screen if requested ...
 357     if ( fgGetBool("/sim/startup/fullscreen") )
 358         fgOSFullScreen();
 359
 360     if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
 361          (!fgGetBool("/sim/rendering/shading"))) {
 362         // if fastest fog requested, or if flat shading force fastest
 363         glHint ( GL_FOG_HINT, GL_FASTEST );
 364     } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
 365         glHint ( GL_FOG_HINT, GL_DONT_CARE );
 366     }
 367
 368     glHint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 369     glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 370     glHint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 371
 372     sceneView->setDefaults(osgUtil::SceneView::COMPILE_GLOBJECTS_AT_INIT);
 373
 374     mFog->setMode(osg::Fog::EXP2);
 375     mRunwayLightingFog->setMode(osg::Fog::EXP2);
 376     mTaxiLightingFog->setMode(osg::Fog::EXP2);
 377     mGroundLightingFog->setMode(osg::Fog::EXP2);
 378
 379     sceneView->setFrameStamp(mFrameStamp.get());
 380
 381     mUpdateVisitor = new SGUpdateVisitor;
 382     sceneView->setUpdateVisitor(mUpdateVisitor.get());
 383
 384     sceneView->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 385
 386     sceneView->getCamera()->setViewMatrix(osg::Matrix(0, 0,-1, 0,
 387                                                       1, 0, 0, 0,
 388                                                       0,-1, 0, 0,
 389                                                       0, 0, 0, 1));
 390     sceneView->getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 391     sceneView->getCamera()->setClearMask(GL_COLOR_BUFFER_BIT);
 392
 393     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 394
 395     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 396
 397     stateSet->setAttribute(new osg::Depth(osg::Depth::LEQUAL));
 398     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 399
 400     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 401     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 402     stateSet->setAttribute(new osg::BlendFunc);
 403     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 404
 405     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 406
 407     // this will be set below
 408     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 409
 410     osg::Material* material = new osg::Material;
 411     stateSet->setAttribute(material);
 412
 413     stateSet->setTextureAttribute(0, new osg::TexEnv);
 414     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 415
 416
 417 //     stateSet->setAttribute(new osg::CullFace(osg::CullFace::BACK));
 418 //     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
 419
 420
 421     // this is the topmost scenegraph node for osg
 422     mBackGroundCamera->addChild(thesky->getPreRoot());
 423     mBackGroundCamera->setClearMask(0);
 424
 425     GLbitfield inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 426     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 427     inheritanceMask &= ~osg::CullSettings::NEAR_FAR_RATIO;
 428     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 429     mBackGroundCamera->setInheritanceMask(inheritanceMask);
 430     mBackGroundCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 431     mBackGroundCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 432     mBackGroundCamera->setRenderOrder(osg::CameraNode::NESTED_RENDER);
 433
 434     mBackGroundCamera->getOrCreateStateSet()->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 435
 436     mRoot->addChild(mBackGroundCamera.get());
 437
 438     mSceneCamera->setClearMask(GL_DEPTH_BUFFER_BIT);
 439     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 440     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 441     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 442     mSceneCamera->setInheritanceMask(inheritanceMask);
 443     mSceneCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 444     mSceneCamera->setCullingMode(osg::CullSettings::DEFAULT_CULLING);
 445     mSceneCamera->setRenderOrder(osg::CameraNode::NESTED_RENDER);
 446     mRoot->addChild(mSceneCamera.get());
 447
 448     stateSet = mSceneCamera->getOrCreateStateSet();
 449     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 450     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 451
 452     // need to update the light on every frame
 453     osg::LightSource* lightSource = new osg::LightSource;
 454     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 455     // relative because of CameraView being just a clever transform node
 456     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 457     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 458     mSceneCamera->addChild(lightSource);
 459
 460     lightSource->addChild(globals->get_scenery()->get_scene_graph());
 461     lightSource->addChild(thesky->getCloudRoot());
 462
 463     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 464     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 465     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 466     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 467     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 468
 469     // enable disable specular highlights.
 470     // is the place where we might plug in an other fragment shader ...
 471     osg::LightModel* lightModel = new osg::LightModel;
 472     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 473     stateSet->setAttribute(lightModel);
 474
 475     // switch to enable wireframe
 476     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 477     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 478     stateSet->setAttributeAndModes(polygonMode);
 479
 480     // scene fog handling
 481     stateSet->setAttributeAndModes(mFog.get());
 482     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 483
 484     // plug in the GUI
 485     osg::CameraNode* guiCamera = new osg::CameraNode;
 486     guiCamera->setRenderOrder(osg::CameraNode::POST_RENDER);
 487     guiCamera->setClearMask(0);
 488     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 489     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 490     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 491     guiCamera->setInheritanceMask(inheritanceMask);
 492     guiCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 493     guiCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 494     mRoot->addChild(guiCamera);
 495     osg::Geode* geode = new osg::Geode;
 496     geode->addDrawable(new SGPuDrawable);
 497     geode->addDrawable(new SGHUDAndPanelDrawable);
 498     guiCamera->addChild(geode);
 499
 500     // this one contains all lights, here we set the light states we did
 501     // in the plib case with plain OpenGL
 502     osg::Group* lightGroup = new osg::Group;
 503     mSceneCamera->addChild(lightGroup);
 504     lightGroup->addChild(globals->get_scenery()->get_gnd_lights_root());
 505     lightGroup->addChild(globals->get_scenery()->get_vasi_lights_root());
 506     lightGroup->addChild(globals->get_scenery()->get_rwy_lights_root());
 507     lightGroup->addChild(globals->get_scenery()->get_taxi_lights_root());
 508
 509     stateSet = globals->get_scenery()->get_gnd_lights_root()->getOrCreateStateSet();
 510     stateSet->setAttributeAndModes(mFog.get());
 511     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 512     stateSet = globals->get_scenery()->get_vasi_lights_root()->getOrCreateStateSet();
 513     stateSet->setAttributeAndModes(mRunwayLightingFog.get());
 514     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 515     stateSet = globals->get_scenery()->get_rwy_lights_root()->getOrCreateStateSet();
 516     stateSet->setAttributeAndModes(mRunwayLightingFog.get());
 517     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 518     stateSet = globals->get_scenery()->get_taxi_lights_root()->getOrCreateStateSet();
 519     stateSet->setAttributeAndModes(mTaxiLightingFog.get());
 520     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 521
 522     mCameraView->addChild(mRoot.get());
 523     sceneView->setSceneData(mCameraView.get());
 524
 525 //  sceneView->getState()->setCheckForGLErrors(osg::State::ONCE_PER_ATTRIBUTE);
 526 }
 527
 528
 529 // Update all Visuals (redraws anything graphics related)
 530 void
 531 FGRenderer::update( bool refresh_camera_settings ) {
 532     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 533                           || fgGetBool("sim/sceneryloaded-override");
 534
 535     if ( idle_state < 1000 || !scenery_loaded ) {
 536         // still initializing, draw the splash screen
 537         glPushAttrib(GL_ALL_ATTRIB_BITS);
 538         glPushClientAttrib(~0u);
 539
 540         fgSplashUpdate(1.0);
 541
 542         glPopClientAttrib();
 543         glPopAttrib();
 544
 545         // Keep resetting sim time while the sim is initializing
 546         globals->set_sim_time_sec( 0.0 );
 547         return;
 548     }
 549
 550     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 551     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 552     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 553     bool distance_attenuation
 554         = fgGetBool("/sim/rendering/distance-attenuation");
 555     // OSGFIXME
 556     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 557                                   distance_attenuation );
 558
 559     static const SGPropertyNode *groundlevel_nearplane
 560         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 561
 562     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 563
 564     // update fog params
 565     double actual_visibility;
 566     if (fgGetBool("/environment/clouds/status")) {
 567         actual_visibility = thesky->get_visibility();
 568     } else {
 569         actual_visibility = fgGetDouble("/environment/visibility-m");
 570     }
 571
 572     static double last_visibility = -9999;
 573     if ( actual_visibility != last_visibility ) {
 574         last_visibility = actual_visibility;
 575
 576         fog_exp_density = m_log01 / actual_visibility;
 577         fog_exp2_density = sqrt_m_log01 / actual_visibility;
 578         ground_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 579         if ( actual_visibility < 8000 ) {
 580             rwy_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 2.5);
 581             taxi_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 582         } else {
 583             rwy_exp2_punch_through = sqrt_m_log01 / ( 8000 * 2.5 );
 584             taxi_exp2_punch_through = sqrt_m_log01 / ( 8000 * 1.5 );
 585         }
 586         mFog->setDensity(fog_exp2_density);
 587         mRunwayLightingFog->setDensity(rwy_exp2_punch_through);
 588         mTaxiLightingFog->setDensity(taxi_exp2_punch_through);
 589         mGroundLightingFog->setDensity(ground_exp2_punch_through);
 590     }
 591
 592     // idle_state is now 1000 meaning we've finished all our
 593     // initializations and are running the main loop, so this will
 594     // now work without seg faulting the system.
 595
 596     FGViewer *current__view = globals->get_current_view();
 597     // Force update of center dependent values ...
 598     current__view->set_dirty();
 599
 600     if ( refresh_camera_settings ) {
 601         // update view port
 602         resize( fgGetInt("/sim/startup/xsize"),
 603                 fgGetInt("/sim/startup/ysize") );
 604
 605         SGVec3d center = globals->get_scenery()->get_center();
 606         SGVec3d position = current__view->getViewPosition();
 607         SGQuatd attitude = current__view->getViewOrientation();
 608         SGVec3d osgPosition = attitude.transform(center - position);
 609         mCameraView->setPosition(osgPosition.osg());
 610         mCameraView->setAttitude(inverse(attitude).osg());
 611     }
 612
 613     if ( skyblend ) {
 614         if ( fgGetBool("/sim/rendering/textures") ) {
 615             SGVec4f clearColor(l->adj_fog_color());
 616             sceneView->getCamera()->setClearColor(clearColor.osg());
 617         }
 618     } else {
 619         SGVec4f clearColor(l->sky_color());
 620         sceneView->getCamera()->setClearColor(clearColor.osg());
 621     }
 622
 623     // update fog params if visibility has changed
 624     double visibility_meters = fgGetDouble("/environment/visibility-m");
 625     thesky->set_visibility(visibility_meters);
 626
 627     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 628                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 629                         / (double)fgGetInt("/sim/model-hz") );
 630
 631     // update the sky dome
 632     if ( skyblend ) {
 633
 634         // The sun and moon distances are scaled down versions
 635         // of the actual distance to get both the moon and the sun
 636         // within the range of the far clip plane.
 637         // Moon distance:    384,467 kilometers
 638         // Sun distance: 150,000,000 kilometers
 639
 640         double sun_horiz_eff, moon_horiz_eff;
 641         if (fgGetBool("/sim/rendering/horizon-effect")) {
 642            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 643            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 644         } else {
 645            sun_horiz_eff = moon_horiz_eff = 1.0;
 646         }
 647
 648         static SGSkyState sstate;
 649
 650         sstate.view_pos  = current__view->get_view_pos();
 651         sstate.zero_elev = current__view->get_zero_elev();
 652         sstate.view_up   = current__view->get_world_up();
 653         sstate.lon       = current__view->getLongitude_deg()
 654                             * SGD_DEGREES_TO_RADIANS;
 655         sstate.lat       = current__view->getLatitude_deg()
 656                             * SGD_DEGREES_TO_RADIANS;
 657         sstate.alt       = current__view->getAltitudeASL_ft()
 658                             * SG_FEET_TO_METER;
 659         sstate.spin      = l->get_sun_rotation();
 660         sstate.gst       = globals->get_time_params()->getGst();
 661         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 662         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 663         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 664         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 665         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 666         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 667         sstate.sun_angle = l->get_sun_angle();
 668
 669
 670         /*
 671          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 672          << l->sky_color()[0] << " "
 673          << l->sky_color()[1] << " "
 674          << l->sky_color()[2] << " "
 675          << l->sky_color()[3] );
 676         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 677          << l->fog_color()[0] << " "
 678          << l->fog_color()[1] << " "
 679          << l->fog_color()[2] << " "
 680          << l->fog_color()[3] );
 681         SG_LOG( SG_GENERAL, SG_BULK,
 682                 "    sun_angle = " << l->sun_angle
 683          << "    moon_angle = " << l->moon_angle );
 684         */
 685
 686         static SGSkyColor scolor;
 687
 688         scolor.sky_color   = SGVec3f(l->sky_color().data());
 689         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 690         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 691         scolor.sun_angle   = l->get_sun_angle();
 692         scolor.moon_angle  = l->get_moon_angle();
 693         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 694         scolor.nstars      = globals->get_ephem()->getNumStars();
 695         scolor.planet_data = globals->get_ephem()->getPlanets();
 696         scolor.star_data   = globals->get_ephem()->getStars();
 697
 698         thesky->reposition( sstate, delta_time_sec );
 699         thesky->repaint( scolor );
 700
 701         /*
 702         SG_LOG( SG_GENERAL, SG_BULK,
 703                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 704          << view_pos[1] << " " << view_pos[2] );
 705         SG_LOG( SG_GENERAL, SG_BULK,
 706                 "    zero_elev = " << zero_elev[0] << " "
 707          << zero_elev[1] << " " << zero_elev[2]
 708          << " lon = " << cur_fdm_state->get_Longitude()
 709          << " lat = " << cur_fdm_state->get_Latitude() );
 710         SG_LOG( SG_GENERAL, SG_BULK,
 711                 "    sun_rot = " << l->get_sun_rotation
 712          << " gst = " << SGTime::cur_time_params->getGst() );
 713         SG_LOG( SG_GENERAL, SG_BULK,
 714              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 715           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 716           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 717           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 718         */
 719
 720         //OSGFIXME
 721 //         shadows->setupShadows(
 722 //           current__view->getLongitude_deg(),
 723 //           current__view->getLatitude_deg(),
 724 //           globals->get_time_params()->getGst(),
 725 //           globals->get_ephem()->getSunRightAscension(),
 726 //           globals->get_ephem()->getSunDeclination(),
 727 //           l->get_sun_angle());
 728
 729     }
 730
 731     if ( strcmp(fgGetString("/sim/rendering/fog"), "disabled") ) {
 732         SGVec4f color(l->adj_fog_color());
 733         mFog->setColor(color.osg());
 734         mRunwayLightingFog->setColor(color.osg());
 735         mTaxiLightingFog->setColor(color.osg());
 736         mGroundLightingFog->setColor(color.osg());
 737     }
 738
 739
 740 //     sgEnviro.setLight(l->adj_fog_color());
 741
 742     // texture parameters
 743     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
 744
 745     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 746       - current__view->getSGLocation()->get_cur_elev_m();
 747
 748     float scene_nearplane, scene_farplane;
 749     if ( agl > 10.0 ) {
 750         scene_nearplane = 10.0f;
 751         scene_farplane = 120000.0f;
 752     } else {
 753         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 754         scene_farplane = 120000.0f;
 755     }
 756
 757     setNearFar( scene_nearplane, scene_farplane );
 758
 759 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 760 //         current__view->get_world_up(),
 761 //         current__view->getLongitude_deg(),
 762 //         current__view->getLatitude_deg(),
 763 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 764 //         delta_time_sec);
 765
 766     // OSGFIXME
 767 //     sgEnviro.drawLightning();
 768
 769 //        double current_view_origin_airspeed_horiz_kt =
 770 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 771 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 772 //                                * SGD_DEGREES_TO_RADIANS);
 773        // TODO:find the real view speed, not the AC one
 774 //     sgEnviro.drawPrecipitation(
 775 //         fgGetDouble("/environment/metar/rain-norm", 0.0),
 776 //         fgGetDouble("/environment/metar/snow-norm", 0.0),
 777 //         fgGetDouble("/environment/metar/hail-norm", 0.0),
 778 //         current__view->getPitch_deg() + current__view->getPitchOffset_deg(),
 779 //         current__view->getRoll_deg() + current__view->getRollOffset_deg(),
 780 //         - current__view->getHeadingOffset_deg(),
 781 //                current_view_origin_airspeed_horiz_kt
 782 //                );
 783
 784     // OSGFIXME
 785 //     if( is_internal )
 786 //         shadows->endOfFrame();
 787
 788     // need to call the update visitor once
 789     globals->get_aircraft_model()->select( true );
 790     FGTileMgr::set_tile_filter( true );
 791     mFrameStamp->setReferenceTime(globals->get_sim_time_sec());
 792     mFrameStamp->setFrameNumber(1+mFrameStamp->getFrameNumber());
 793     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 794     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 795                                 current__view->getViewOrientation());
 796     mUpdateVisitor->setSceneryCenter(globals->get_scenery()->get_center());
 797     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 798     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 799                              l->scene_diffuse(), l->scene_specular());
 800     mUpdateVisitor->setVisibility(actual_visibility);
 801     sceneView->update();
 802     sceneView->cull();
 803     sceneView->draw();
 804 }
 805
 806
 807
 808 // options.cxx needs to see this for toggle_panel()
 809 // Handle new window size or exposure
 810 void
 811 FGRenderer::resize( int width, int height ) {
 812     int view_h;
 813
 814     if ( (!fgGetBool("/sim/virtual-cockpit"))
 815          && fgPanelVisible() && idle_state == 1000 ) {
 816         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 817                              globals->get_current_panel()->getYOffset()) / 768.0);
 818     } else {
 819         view_h = height;
 820     }
 821
 822     sceneView->getViewport()->setViewport(0, height - view_h, width, view_h);
 823
 824     static int lastwidth = 0;
 825     static int lastheight = 0;
 826     if (width != lastwidth)
 827         fgSetInt("/sim/startup/xsize", lastwidth = width);
 828     if (height != lastheight)
 829         fgSetInt("/sim/startup/ysize", lastheight = height);
 830
 831     guiInitMouse(width, height);
 832
 833     // for all views
 834     FGViewMgr *viewmgr = globals->get_viewmgr();
 835     if (viewmgr) {
 836       for ( int i = 0; i < viewmgr->size(); ++i ) {
 837         viewmgr->get_view(i)->
 838           set_aspect_ratio((float)view_h / (float)width);
 839       }
 840
 841       setFOV( viewmgr->get_current_view()->get_h_fov(),
 842               viewmgr->get_current_view()->get_v_fov() );
 843       // cout << "setFOV(" << viewmgr->get_current_view()->get_h_fov()
 844       //      << ", " << viewmgr->get_current_view()->get_v_fov() << ")"
 845       //      << endl;
 846     }
 847 }
 848
 849
 850 // These are wrapper functions around ssgSetNearFar() and ssgSetFOV()
 851 // which will post process and rewrite the resulting frustum if we
 852 // want to do asymmetric view frustums.
 853
 854 static void fgHackFrustum() {
 855
 856     // specify a percent of the configured view frustum to actually
 857     // display.  This is a bit of a hack to achieve asymmetric view
 858     // frustums.  For instance, if you want to display two monitors
 859     // side by side, you could specify each with a double fov, a 0.5
 860     // aspect ratio multiplier, and then the left side monitor would
 861     // have a left_pct = 0.0, a right_pct = 0.5, a bottom_pct = 0.0,
 862     // and a top_pct = 1.0.  The right side monitor would have a
 863     // left_pct = 0.5 and a right_pct = 1.0.
 864
 865     static SGPropertyNode *left_pct
 866         = fgGetNode("/sim/current-view/frustum-left-pct");
 867     static SGPropertyNode *right_pct
 868         = fgGetNode("/sim/current-view/frustum-right-pct");
 869     static SGPropertyNode *bottom_pct
 870         = fgGetNode("/sim/current-view/frustum-bottom-pct");
 871     static SGPropertyNode *top_pct
 872         = fgGetNode("/sim/current-view/frustum-top-pct");
 873
 874     double left, right;
 875     double bottom, top;
 876     double zNear, zFar;
 877     sceneView->getProjectionMatrixAsFrustum(left, right, bottom, top, zNear, zFar);
 878     // cout << " l = " << f->getLeft()
 879     //      << " r = " << f->getRight()
 880     //      << " b = " << f->getBot()
 881     //      << " t = " << f->getTop()
 882     //      << " n = " << f->getNear()
 883     //      << " f = " << f->getFar()
 884     //      << endl;
 885
 886     double width = right - left;
 887     double height = top - bottom;
 888
 889     double l, r, t, b;
 890
 891     if ( left_pct != NULL ) {
 892         l = left + width * left_pct->getDoubleValue();
 893     } else {
 894         l = left;
 895     }
 896
 897     if ( right_pct != NULL ) {
 898         r = left + width * right_pct->getDoubleValue();
 899     } else {
 900         r = right;
 901     }
 902
 903     if ( bottom_pct != NULL ) {
 904         b = bottom + height * bottom_pct->getDoubleValue();
 905     } else {
 906         b = bottom;
 907     }
 908
 909     if ( top_pct != NULL ) {
 910         t = bottom + height * top_pct->getDoubleValue();
 911     } else {
 912         t = top;
 913     }
 914
 915     sceneView->setProjectionMatrixAsFrustum(l, r, b, t, zNear, zFar);
 916 }
 917
 918
 919 // we need some static storage space for these values.  However, we
 920 // can't store it in a renderer class object because the functions
 921 // that manipulate these are static.  They are static so they can
 922 // interface to the display callback system.  There's probably a
 923 // better way, there has to be a better way, but I'm not seeing it
 924 // right now.
 925 static float fov_width = 55.0;
 926 static float fov_height = 42.0;
 927 static float fov_near = 1.0;
 928 static float fov_far = 1000.0;
 929
 930
 931 /** FlightGear code should use this routine to set the FOV rather than
 932  *  calling the ssg routine directly
 933  */
 934 void FGRenderer::setFOV( float w, float h ) {
 935     fov_width = w;
 936     fov_height = h;
 937
 938     sceneView->setProjectionMatrixAsPerspective(fov_height,
 939                                                 fov_width/fov_height,
 940                                                 fov_near, fov_far);
 941     // fully specify the view frustum before hacking it (so we don't
 942     // accumulate hacked effects
 943     fgHackFrustum();
 944 //     sgEnviro.setFOV( w, h );
 945 }
 946
 947
 948 /** FlightGear code should use this routine to set the Near/Far clip
 949  *  planes rather than calling the ssg routine directly
 950  */
 951 void FGRenderer::setNearFar( float n, float f ) {
 952 // OSGFIXME: we have currently too much z-buffer fights
 953 n = 0.2;
 954     fov_near = n;
 955     fov_far = f;
 956
 957     sceneView->setProjectionMatrixAsPerspective(fov_height,
 958                                                 fov_width/fov_height,
 959                                                 fov_near, fov_far);
 960
 961     sceneView->getCamera()->setNearFarRatio(fov_near/fov_far);
 962     mSceneCamera->setNearFarRatio(fov_near/fov_far);
 963
 964     // fully specify the view frustum before hacking it (so we don't
 965     // accumulate hacked effects
 966     fgHackFrustum();
 967 }
 968
 969 bool FGRenderer::getPickInfo( SGVec3d& pt, SGVec3d& dir,
 970                               unsigned x, unsigned y )
 971 {
 972   // Get the matrices involved in the transform from global to screen
 973   // coordinates.
 974   osg::Matrix pm = sceneView->getCamera()->getProjectionMatrix();
 975
 976   osg::Matrix mv;
 977   osg::NodePathList paths;
 978   paths = globals->get_scenery()->get_scene_graph()->getParentalNodePaths();
 979   if (!paths.empty()) {
 980     // Ok, we know that this should not have multiple parents ...
 981     // FIXME: is this allways true?
 982     mv = osg::computeLocalToEye(sceneView->getCamera()->getViewMatrix(),
 983                                 paths.front(), false);
 984   }
 985
 986   // Compose and invert
 987   osg::Matrix m = osg::Matrix::inverse(mv*pm);
 988
 989   // Get the width and height of the display to be able to normalize the
 990   // mouse coordinate
 991   float width = fgGetInt("/sim/startup/xsize");
 992   float height = fgGetInt("/sim/startup/ysize");
 993
 994   // Compute some coordinates of in the line from the eyepoint to the
 995   // mouse click coodinates.
 996   // First build the normalized projection coordinates
 997   osg::Vec4 normPt((2*x - width)/width, -(2*y - height)/height, 1, 1);
 998   // Transform them into the real world
 999   osg::Vec4 worldPt4 = m.preMult(normPt);
1000   if (fabs(worldPt4[3]) < SGLimitsf::min())
1001     return false;
1002   SGVec3f worldPt(worldPt4[0]/worldPt4[3],
1003                   worldPt4[1]/worldPt4[3],
1004                   worldPt4[2]/worldPt4[3]);
1005
1006   // Now build a direction from the point
1007   FGViewer* view = globals->get_current_view();
1008   dir = normalize(toVec3d(worldPt - SGVec3f(view->get_view_pos())));
1009
1010   // Copy the start point
1011   pt = SGVec3d(view->get_absolute_view_pos());
1012
1013   // OSGFIXME: ist this sufficient??? especially the precision problems here??
1014 // bool mSceneView->projectWindowXYIntoObject(int x,int y,osg::Vec3& near_point,osg::Vec3& far_point) const;
1015
1016
1017   return true;
1018 }
1019
1020 // end of renderer.cxx
1021