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