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
 390     sceneView->getCamera()->setViewMatrix(osg::Matrix(0, 0,-1, 0,
 391                                                       1, 0, 0, 0,
 392                                                       0,-1, 0, 0,
 393                                                       0, 0, 0, 1));
 394     sceneView->getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 395     sceneView->getCamera()->setClearMask(GL_COLOR_BUFFER_BIT);
 396
 397     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 398
 399     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 400
 401     stateSet->setAttribute(new osg::Depth(osg::Depth::LEQUAL));
 402     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 403
 404     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 405     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 406     stateSet->setAttribute(new osg::BlendFunc);
 407     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 408
 409     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 410
 411     // this will be set below
 412     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 413
 414     osg::Material* material = new osg::Material;
 415     stateSet->setAttribute(material);
 416
 417     stateSet->setTextureAttribute(0, new osg::TexEnv);
 418     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 419
 420
 421 //     stateSet->setAttribute(new osg::CullFace(osg::CullFace::BACK));
 422 //     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
 423
 424
 425     // this is the topmost scenegraph node for osg
 426     mBackGroundCamera->addChild(thesky->getPreRoot());
 427     mBackGroundCamera->setClearMask(0);
 428
 429     GLbitfield inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 430     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 431     inheritanceMask &= ~osg::CullSettings::NEAR_FAR_RATIO;
 432     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 433     mBackGroundCamera->setInheritanceMask(inheritanceMask);
 434     mBackGroundCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 435     mBackGroundCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 436     mBackGroundCamera->setRenderOrder(osg::CameraNode::NESTED_RENDER);
 437
 438     mBackGroundCamera->getOrCreateStateSet()->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 439
 440     mRoot->addChild(mBackGroundCamera.get());
 441
 442     mSceneCamera->setClearMask(GL_DEPTH_BUFFER_BIT);
 443     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 444     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 445     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 446     mSceneCamera->setInheritanceMask(inheritanceMask);
 447     mSceneCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 448     mSceneCamera->setCullingMode(osg::CullSettings::DEFAULT_CULLING);
 449     mSceneCamera->setRenderOrder(osg::CameraNode::NESTED_RENDER);
 450     mRoot->addChild(mSceneCamera.get());
 451
 452     stateSet = mSceneCamera->getOrCreateStateSet();
 453     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 454     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 455
 456     // need to update the light on every frame
 457     osg::LightSource* lightSource = new osg::LightSource;
 458     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 459     // relative because of CameraView being just a clever transform node
 460     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 461     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 462     mSceneCamera->addChild(lightSource);
 463
 464     lightSource->addChild(globals->get_scenery()->get_scene_graph());
 465     lightSource->addChild(thesky->getCloudRoot());
 466
 467     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 468     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 469     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 470     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 471     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 472
 473     // enable disable specular highlights.
 474     // is the place where we might plug in an other fragment shader ...
 475     osg::LightModel* lightModel = new osg::LightModel;
 476     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 477     stateSet->setAttribute(lightModel);
 478
 479     // switch to enable wireframe
 480     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 481     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 482     stateSet->setAttributeAndModes(polygonMode);
 483
 484     // scene fog handling
 485     stateSet->setAttributeAndModes(mFog.get());
 486     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 487
 488     // plug in the GUI
 489     osg::CameraNode* guiCamera = new osg::CameraNode;
 490     guiCamera->setRenderOrder(osg::CameraNode::POST_RENDER);
 491     guiCamera->setClearMask(0);
 492     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 493     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 494     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 495     guiCamera->setInheritanceMask(inheritanceMask);
 496     guiCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 497     guiCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 498     mRoot->addChild(guiCamera);
 499     osg::Geode* geode = new osg::Geode;
 500     geode->addDrawable(new SGPuDrawable);
 501     geode->addDrawable(new SGHUDAndPanelDrawable);
 502     guiCamera->addChild(geode);
 503
 504     // this one contains all lights, here we set the light states we did
 505     // in the plib case with plain OpenGL
 506     osg::Group* lightGroup = new osg::Group;
 507     mSceneCamera->addChild(lightGroup);
 508     lightGroup->addChild(globals->get_scenery()->get_gnd_lights_root());
 509     lightGroup->addChild(globals->get_scenery()->get_vasi_lights_root());
 510     lightGroup->addChild(globals->get_scenery()->get_rwy_lights_root());
 511     lightGroup->addChild(globals->get_scenery()->get_taxi_lights_root());
 512
 513     stateSet = globals->get_scenery()->get_gnd_lights_root()->getOrCreateStateSet();
 514     stateSet->setAttributeAndModes(mFog.get());
 515     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 516     stateSet = globals->get_scenery()->get_vasi_lights_root()->getOrCreateStateSet();
 517     stateSet->setAttributeAndModes(mRunwayLightingFog.get());
 518     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 519     stateSet = globals->get_scenery()->get_rwy_lights_root()->getOrCreateStateSet();
 520     stateSet->setAttributeAndModes(mRunwayLightingFog.get());
 521     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 522     stateSet = globals->get_scenery()->get_taxi_lights_root()->getOrCreateStateSet();
 523     stateSet->setAttributeAndModes(mTaxiLightingFog.get());
 524     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 525
 526     mCameraView->addChild(mRoot.get());
 527     sceneView->setSceneData(mCameraView.get());
 528
 529 //  sceneView->getState()->setCheckForGLErrors(osg::State::ONCE_PER_ATTRIBUTE);
 530 }
 531
 532
 533 // Update all Visuals (redraws anything graphics related)
 534 void
 535 FGRenderer::update( bool refresh_camera_settings ) {
 536     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 537                           || fgGetBool("sim/sceneryloaded-override");
 538
 539     if ( idle_state < 1000 || !scenery_loaded ) {
 540         // still initializing, draw the splash screen
 541         glPushAttrib(GL_ALL_ATTRIB_BITS);
 542         glPushClientAttrib(~0u);
 543
 544         fgSplashUpdate(1.0);
 545
 546         glPopClientAttrib();
 547         glPopAttrib();
 548
 549         // Keep resetting sim time while the sim is initializing
 550         globals->set_sim_time_sec( 0.0 );
 551         return;
 552     }
 553
 554     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 555     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 556     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 557     bool distance_attenuation
 558         = fgGetBool("/sim/rendering/distance-attenuation");
 559     // OSGFIXME
 560     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 561                                   distance_attenuation );
 562
 563     static const SGPropertyNode *groundlevel_nearplane
 564         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 565
 566     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 567
 568     // update fog params
 569     double actual_visibility;
 570     if (fgGetBool("/environment/clouds/status")) {
 571         actual_visibility = thesky->get_visibility();
 572     } else {
 573         actual_visibility = fgGetDouble("/environment/visibility-m");
 574     }
 575
 576     static double last_visibility = -9999;
 577     if ( actual_visibility != last_visibility ) {
 578         last_visibility = actual_visibility;
 579
 580         fog_exp_density = m_log01 / actual_visibility;
 581         fog_exp2_density = sqrt_m_log01 / actual_visibility;
 582         ground_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 583         if ( actual_visibility < 8000 ) {
 584             rwy_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 2.5);
 585             taxi_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 586         } else {
 587             rwy_exp2_punch_through = sqrt_m_log01 / ( 8000 * 2.5 );
 588             taxi_exp2_punch_through = sqrt_m_log01 / ( 8000 * 1.5 );
 589         }
 590         mFog->setDensity(fog_exp2_density);
 591         mRunwayLightingFog->setDensity(rwy_exp2_punch_through);
 592         mTaxiLightingFog->setDensity(taxi_exp2_punch_through);
 593         mGroundLightingFog->setDensity(ground_exp2_punch_through);
 594     }
 595
 596     // idle_state is now 1000 meaning we've finished all our
 597     // initializations and are running the main loop, so this will
 598     // now work without seg faulting the system.
 599
 600     FGViewer *current__view = globals->get_current_view();
 601     // Force update of center dependent values ...
 602     current__view->set_dirty();
 603
 604     if ( refresh_camera_settings ) {
 605         // update view port
 606         resize( fgGetInt("/sim/startup/xsize"),
 607                 fgGetInt("/sim/startup/ysize") );
 608
 609         SGVec3d center = globals->get_scenery()->get_center();
 610         SGVec3d position = current__view->getViewPosition();
 611         SGQuatd attitude = current__view->getViewOrientation();
 612         SGVec3d osgPosition = attitude.transform(center - position);
 613         mCameraView->setPosition(osgPosition.osg());
 614         mCameraView->setAttitude(inverse(attitude).osg());
 615     }
 616
 617     if ( skyblend ) {
 618         if ( fgGetBool("/sim/rendering/textures") ) {
 619             SGVec4f clearColor(l->adj_fog_color());
 620             sceneView->getCamera()->setClearColor(clearColor.osg());
 621         }
 622     } else {
 623         SGVec4f clearColor(l->sky_color());
 624         sceneView->getCamera()->setClearColor(clearColor.osg());
 625     }
 626
 627     // update fog params if visibility has changed
 628     double visibility_meters = fgGetDouble("/environment/visibility-m");
 629     thesky->set_visibility(visibility_meters);
 630
 631     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 632                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 633                         / (double)fgGetInt("/sim/model-hz") );
 634
 635     // update the sky dome
 636     if ( skyblend ) {
 637
 638         // The sun and moon distances are scaled down versions
 639         // of the actual distance to get both the moon and the sun
 640         // within the range of the far clip plane.
 641         // Moon distance:    384,467 kilometers
 642         // Sun distance: 150,000,000 kilometers
 643
 644         double sun_horiz_eff, moon_horiz_eff;
 645         if (fgGetBool("/sim/rendering/horizon-effect")) {
 646            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 647            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 648         } else {
 649            sun_horiz_eff = moon_horiz_eff = 1.0;
 650         }
 651
 652         static SGSkyState sstate;
 653
 654         sstate.view_pos  = current__view->get_view_pos();
 655         sstate.zero_elev = current__view->get_zero_elev();
 656         sstate.view_up   = current__view->get_world_up();
 657         sstate.lon       = current__view->getLongitude_deg()
 658                             * SGD_DEGREES_TO_RADIANS;
 659         sstate.lat       = current__view->getLatitude_deg()
 660                             * SGD_DEGREES_TO_RADIANS;
 661         sstate.alt       = current__view->getAltitudeASL_ft()
 662                             * SG_FEET_TO_METER;
 663         sstate.spin      = l->get_sun_rotation();
 664         sstate.gst       = globals->get_time_params()->getGst();
 665         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 666         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 667         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 668         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 669         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 670         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 671         sstate.sun_angle = l->get_sun_angle();
 672
 673
 674         /*
 675          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 676          << l->sky_color()[0] << " "
 677          << l->sky_color()[1] << " "
 678          << l->sky_color()[2] << " "
 679          << l->sky_color()[3] );
 680         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 681          << l->fog_color()[0] << " "
 682          << l->fog_color()[1] << " "
 683          << l->fog_color()[2] << " "
 684          << l->fog_color()[3] );
 685         SG_LOG( SG_GENERAL, SG_BULK,
 686                 "    sun_angle = " << l->sun_angle
 687          << "    moon_angle = " << l->moon_angle );
 688         */
 689
 690         static SGSkyColor scolor;
 691
 692         scolor.sky_color   = SGVec3f(l->sky_color().data());
 693         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 694         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 695         scolor.sun_angle   = l->get_sun_angle();
 696         scolor.moon_angle  = l->get_moon_angle();
 697         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 698         scolor.nstars      = globals->get_ephem()->getNumStars();
 699         scolor.planet_data = globals->get_ephem()->getPlanets();
 700         scolor.star_data   = globals->get_ephem()->getStars();
 701
 702         thesky->reposition( sstate, delta_time_sec );
 703         thesky->repaint( scolor );
 704
 705         /*
 706         SG_LOG( SG_GENERAL, SG_BULK,
 707                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 708          << view_pos[1] << " " << view_pos[2] );
 709         SG_LOG( SG_GENERAL, SG_BULK,
 710                 "    zero_elev = " << zero_elev[0] << " "
 711          << zero_elev[1] << " " << zero_elev[2]
 712          << " lon = " << cur_fdm_state->get_Longitude()
 713          << " lat = " << cur_fdm_state->get_Latitude() );
 714         SG_LOG( SG_GENERAL, SG_BULK,
 715                 "    sun_rot = " << l->get_sun_rotation
 716          << " gst = " << SGTime::cur_time_params->getGst() );
 717         SG_LOG( SG_GENERAL, SG_BULK,
 718              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 719           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 720           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 721           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 722         */
 723
 724         //OSGFIXME
 725 //         shadows->setupShadows(
 726 //           current__view->getLongitude_deg(),
 727 //           current__view->getLatitude_deg(),
 728 //           globals->get_time_params()->getGst(),
 729 //           globals->get_ephem()->getSunRightAscension(),
 730 //           globals->get_ephem()->getSunDeclination(),
 731 //           l->get_sun_angle());
 732
 733     }
 734
 735     if ( strcmp(fgGetString("/sim/rendering/fog"), "disabled") ) {
 736         SGVec4f color(l->adj_fog_color());
 737         mFog->setColor(color.osg());
 738         mRunwayLightingFog->setColor(color.osg());
 739         mTaxiLightingFog->setColor(color.osg());
 740         mGroundLightingFog->setColor(color.osg());
 741     }
 742
 743
 744 //     sgEnviro.setLight(l->adj_fog_color());
 745
 746     // texture parameters
 747     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
 748
 749     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 750       - current__view->getSGLocation()->get_cur_elev_m();
 751
 752     float scene_nearplane, scene_farplane;
 753     if ( agl > 10.0 ) {
 754         scene_nearplane = 10.0f;
 755         scene_farplane = 120000.0f;
 756     } else {
 757         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 758         scene_farplane = 120000.0f;
 759     }
 760
 761     setNearFar( scene_nearplane, scene_farplane );
 762
 763 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 764 //         current__view->get_world_up(),
 765 //         current__view->getLongitude_deg(),
 766 //         current__view->getLatitude_deg(),
 767 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 768 //         delta_time_sec);
 769
 770     // OSGFIXME
 771 //     sgEnviro.drawLightning();
 772
 773 //        double current_view_origin_airspeed_horiz_kt =
 774 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 775 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 776 //                                * SGD_DEGREES_TO_RADIANS);
 777        // TODO:find the real view speed, not the AC one
 778 //     sgEnviro.drawPrecipitation(
 779 //         fgGetDouble("/environment/metar/rain-norm", 0.0),
 780 //         fgGetDouble("/environment/metar/snow-norm", 0.0),
 781 //         fgGetDouble("/environment/metar/hail-norm", 0.0),
 782 //         current__view->getPitch_deg() + current__view->getPitchOffset_deg(),
 783 //         current__view->getRoll_deg() + current__view->getRollOffset_deg(),
 784 //         - current__view->getHeadingOffset_deg(),
 785 //                current_view_origin_airspeed_horiz_kt
 786 //                );
 787
 788     // OSGFIXME
 789 //     if( is_internal )
 790 //         shadows->endOfFrame();
 791
 792     // need to call the update visitor once
 793     globals->get_aircraft_model()->select( true );
 794     FGTileMgr::set_tile_filter( true );
 795     mFrameStamp->setReferenceTime(globals->get_sim_time_sec());
 796     mFrameStamp->setFrameNumber(1+mFrameStamp->getFrameNumber());
 797     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 798     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 799                                 current__view->getViewOrientation());
 800     mUpdateVisitor->setSceneryCenter(globals->get_scenery()->get_center());
 801     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 802     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 803                              l->scene_diffuse(), l->scene_specular());
 804     mUpdateVisitor->setVisibility(actual_visibility);
 805     sceneView->update();
 806     sceneView->cull();
 807     sceneView->draw();
 808 }
 809
 810
 811
 812 // options.cxx needs to see this for toggle_panel()
 813 // Handle new window size or exposure
 814 void
 815 FGRenderer::resize( int width, int height ) {
 816     int view_h;
 817
 818     if ( (!fgGetBool("/sim/virtual-cockpit"))
 819          && fgPanelVisible() && idle_state == 1000 ) {
 820         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 821                              globals->get_current_panel()->getYOffset()) / 768.0);
 822     } else {
 823         view_h = height;
 824     }
 825
 826     sceneView->getViewport()->setViewport(0, height - view_h, width, view_h);
 827
 828     static int lastwidth = 0;
 829     static int lastheight = 0;
 830     if (width != lastwidth)
 831         fgSetInt("/sim/startup/xsize", lastwidth = width);
 832     if (height != lastheight)
 833         fgSetInt("/sim/startup/ysize", lastheight = height);
 834
 835     guiInitMouse(width, height);
 836
 837     // for all views
 838     FGViewMgr *viewmgr = globals->get_viewmgr();
 839     if (viewmgr) {
 840       for ( int i = 0; i < viewmgr->size(); ++i ) {
 841         viewmgr->get_view(i)->
 842           set_aspect_ratio((float)view_h / (float)width);
 843       }
 844
 845       setFOV( viewmgr->get_current_view()->get_h_fov(),
 846               viewmgr->get_current_view()->get_v_fov() );
 847       // cout << "setFOV(" << viewmgr->get_current_view()->get_h_fov()
 848       //      << ", " << viewmgr->get_current_view()->get_v_fov() << ")"
 849       //      << endl;
 850     }
 851 }
 852
 853
 854 // These are wrapper functions around ssgSetNearFar() and ssgSetFOV()
 855 // which will post process and rewrite the resulting frustum if we
 856 // want to do asymmetric view frustums.
 857
 858 static void fgHackFrustum() {
 859
 860     // specify a percent of the configured view frustum to actually
 861     // display.  This is a bit of a hack to achieve asymmetric view
 862     // frustums.  For instance, if you want to display two monitors
 863     // side by side, you could specify each with a double fov, a 0.5
 864     // aspect ratio multiplier, and then the left side monitor would
 865     // have a left_pct = 0.0, a right_pct = 0.5, a bottom_pct = 0.0,
 866     // and a top_pct = 1.0.  The right side monitor would have a
 867     // left_pct = 0.5 and a right_pct = 1.0.
 868
 869     static SGPropertyNode *left_pct
 870         = fgGetNode("/sim/current-view/frustum-left-pct");
 871     static SGPropertyNode *right_pct
 872         = fgGetNode("/sim/current-view/frustum-right-pct");
 873     static SGPropertyNode *bottom_pct
 874         = fgGetNode("/sim/current-view/frustum-bottom-pct");
 875     static SGPropertyNode *top_pct
 876         = fgGetNode("/sim/current-view/frustum-top-pct");
 877
 878     double left, right;
 879     double bottom, top;
 880     double zNear, zFar;
 881     sceneView->getProjectionMatrixAsFrustum(left, right, bottom, top, zNear, zFar);
 882     // cout << " l = " << f->getLeft()
 883     //      << " r = " << f->getRight()
 884     //      << " b = " << f->getBot()
 885     //      << " t = " << f->getTop()
 886     //      << " n = " << f->getNear()
 887     //      << " f = " << f->getFar()
 888     //      << endl;
 889
 890     double width = right - left;
 891     double height = top - bottom;
 892
 893     double l, r, t, b;
 894
 895     if ( left_pct != NULL ) {
 896         l = left + width * left_pct->getDoubleValue();
 897     } else {
 898         l = left;
 899     }
 900
 901     if ( right_pct != NULL ) {
 902         r = left + width * right_pct->getDoubleValue();
 903     } else {
 904         r = right;
 905     }
 906
 907     if ( bottom_pct != NULL ) {
 908         b = bottom + height * bottom_pct->getDoubleValue();
 909     } else {
 910         b = bottom;
 911     }
 912
 913     if ( top_pct != NULL ) {
 914         t = bottom + height * top_pct->getDoubleValue();
 915     } else {
 916         t = top;
 917     }
 918
 919     sceneView->setProjectionMatrixAsFrustum(l, r, b, t, zNear, zFar);
 920 }
 921
 922
 923 // we need some static storage space for these values.  However, we
 924 // can't store it in a renderer class object because the functions
 925 // that manipulate these are static.  They are static so they can
 926 // interface to the display callback system.  There's probably a
 927 // better way, there has to be a better way, but I'm not seeing it
 928 // right now.
 929 static float fov_width = 55.0;
 930 static float fov_height = 42.0;
 931 static float fov_near = 1.0;
 932 static float fov_far = 1000.0;
 933
 934
 935 /** FlightGear code should use this routine to set the FOV rather than
 936  *  calling the ssg routine directly
 937  */
 938 void FGRenderer::setFOV( float w, float h ) {
 939     fov_width = w;
 940     fov_height = h;
 941
 942     sceneView->setProjectionMatrixAsPerspective(fov_height,
 943                                                 fov_width/fov_height,
 944                                                 fov_near, fov_far);
 945     // fully specify the view frustum before hacking it (so we don't
 946     // accumulate hacked effects
 947     fgHackFrustum();
 948 //     sgEnviro.setFOV( w, h );
 949 }
 950
 951
 952 /** FlightGear code should use this routine to set the Near/Far clip
 953  *  planes rather than calling the ssg routine directly
 954  */
 955 void FGRenderer::setNearFar( float n, float f ) {
 956 // OSGFIXME: we have currently too much z-buffer fights
 957 n = 0.2;
 958     fov_near = n;
 959     fov_far = f;
 960
 961     sceneView->setProjectionMatrixAsPerspective(fov_height,
 962                                                 fov_width/fov_height,
 963                                                 fov_near, fov_far);
 964
 965     sceneView->getCamera()->setNearFarRatio(fov_near/fov_far);
 966     mSceneCamera->setNearFarRatio(fov_near/fov_far);
 967
 968     // fully specify the view frustum before hacking it (so we don't
 969     // accumulate hacked effects
 970     fgHackFrustum();
 971 }
 972
 973 bool FGRenderer::getPickInfo( SGVec3d& pt, SGVec3d& dir,
 974                               unsigned x, unsigned y )
 975 {
 976   // Get the matrices involved in the transform from global to screen
 977   // coordinates.
 978   osg::Matrix pm = sceneView->getCamera()->getProjectionMatrix();
 979
 980   osg::Matrix mv;
 981   osg::NodePathList paths;
 982   paths = globals->get_scenery()->get_scene_graph()->getParentalNodePaths();
 983   if (!paths.empty()) {
 984     // Ok, we know that this should not have multiple parents ...
 985     // FIXME: is this allways true?
 986     mv = osg::computeLocalToEye(sceneView->getCamera()->getViewMatrix(),
 987                                 paths.front(), false);
 988   }
 989
 990   // Compose and invert
 991   osg::Matrix m = osg::Matrix::inverse(mv*pm);
 992
 993   // Get the width and height of the display to be able to normalize the
 994   // mouse coordinate
 995   float width = fgGetInt("/sim/startup/xsize");
 996   float height = fgGetInt("/sim/startup/ysize");
 997
 998   // Compute some coordinates of in the line from the eyepoint to the
 999   // mouse click coodinates.
1000   // First build the normalized projection coordinates
1001   osg::Vec4 normPt((2*x - width)/width, -(2*y - height)/height, 1, 1);
1002   // Transform them into the real world
1003   osg::Vec4 worldPt4 = m.preMult(normPt);
1004   if (fabs(worldPt4[3]) < SGLimitsf::min())
1005     return false;
1006   SGVec3f worldPt(worldPt4[0]/worldPt4[3],
1007                   worldPt4[1]/worldPt4[3],
1008                   worldPt4[2]/worldPt4[3]);
1009
1010   // Now build a direction from the point
1011   FGViewer* view = globals->get_current_view();
1012   dir = normalize(toVec3d(worldPt - SGVec3f(view->get_view_pos())));
1013
1014   // Copy the start point
1015   pt = SGVec3d(view->get_absolute_view_pos());
1016
1017   // OSGFIXME: ist this sufficient??? especially the precision problems here??
1018 // bool mSceneView->projectWindowXYIntoObject(int x,int y,osg::Vec3& near_point,osg::Vec3& far_point) const;
1019
1020
1021   return true;
1022 }
1023
1024 // end of renderer.cxx
1025