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/PolygonMode>
  50 #include <osg/PolygonOffset>
  51 #include <osg/ShadeModel>
  52 #include <osg/TexEnv>
  53
  54 #include <osgUtil/SceneView>
  55 #include <osgUtil/UpdateVisitor>
  56
  57 #include <osg/io_utils>
  58 #include <osgDB/WriteFile>
  59 #include <osgDB/ReadFile>
  60 #include <sstream>
  61
  62 #include <simgear/math/SGMath.hxx>
  63 #include <simgear/screen/extensions.hxx>
  64 #include <simgear/scene/material/matlib.hxx>
  65 #include <simgear/scene/model/animation.hxx>
  66 #include <simgear/scene/model/model.hxx>
  67 #include <simgear/scene/model/modellib.hxx>
  68 #include <simgear/scene/model/placement.hxx>
  69 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  70 #include <simgear/scene/tgdb/pt_lights.hxx>
  71 #include <simgear/props/props.hxx>
  72 #include <simgear/timing/sg_time.hxx>
  73 #include <simgear/ephemeris/ephemeris.hxx>
  74 #include <simgear/math/sg_random.h>
  75 #ifdef FG_JPEG_SERVER
  76 #include <simgear/screen/jpgfactory.hxx>
  77 #endif
  78
  79 #include <simgear/environment/visual_enviro.hxx>
  80
  81 #include <Scenery/tileentry.hxx>
  82 #include <Time/light.hxx>
  83 #include <Time/light.hxx>
  84 #include <Aircraft/aircraft.hxx>
  85 #include <Cockpit/panel.hxx>
  86 #include <Cockpit/cockpit.hxx>
  87 #include <Cockpit/hud.hxx>
  88 #include <Model/panelnode.hxx>
  89 #include <Model/modelmgr.hxx>
  90 #include <Model/acmodel.hxx>
  91 #include <Scenery/scenery.hxx>
  92 #include <Scenery/tilemgr.hxx>
  93 #include <ATC/ATCdisplay.hxx>
  94 #include <GUI/new_gui.hxx>
  95 #include <Instrumentation/instrument_mgr.hxx>
  96 #include <Instrumentation/HUD/HUD.hxx>
  97
  98 #include "splash.hxx"
  99 #include "renderer.hxx"
 100 #include "main.hxx"
 101
 102 class SGPuDrawable : public osg::Drawable {
 103 public:
 104   SGPuDrawable()
 105   {
 106     // Dynamic stuff, do not store geometry
 107     setUseDisplayList(false);
 108
 109     osg::StateSet* stateSet = getOrCreateStateSet();
 110     stateSet->setRenderBinDetails(1001, "RenderBin");
 111     // speed optimization?
 112     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 113     // We can do translucent menus, so why not. :-)
 114     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 115     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 116     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 117
 118     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 119
 120     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 121     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 122   }
 123   virtual void drawImplementation(osg::State& state) const
 124   {
 125     state.pushStateSet(getStateSet());
 126     state.apply();
 127     state.setActiveTextureUnit(0);
 128     state.setClientActiveTextureUnit(0);
 129
 130     if((fgGetBool("/sim/atc/enabled"))
 131        || (fgGetBool("/sim/ai-traffic/enabled")))
 132       globals->get_ATC_display()->update(delta_time_sec, state);
 133
 134     puDisplay();
 135
 136     // Fade out the splash screen over the first three seconds.
 137     double t = globals->get_sim_time_sec();
 138     if (t <= 2.5) {
 139       glPushAttrib(GL_ALL_ATTRIB_BITS);
 140       glPushClientAttrib(~0u);
 141
 142       fgSplashUpdate((2.5 - t) / 2.5);
 143
 144       glPopClientAttrib();
 145       glPopAttrib();
 146     }
 147
 148     state.popStateSet();
 149   }
 150
 151   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 152   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 153
 154 private:
 155 };
 156
 157 class SGHUDAndPanelDrawable : public osg::Drawable {
 158 public:
 159   SGHUDAndPanelDrawable()
 160   {
 161     // Dynamic stuff, do not store geometry
 162     setUseDisplayList(false);
 163
 164     osg::StateSet* stateSet = getOrCreateStateSet();
 165     stateSet->setRenderBinDetails(1000, "RenderBin");
 166
 167     // speed optimization?
 168     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 169     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 170     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 171     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 172     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 173
 174     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 175   }
 176   virtual void drawImplementation(osg::State& state) const
 177   {
 178     state.pushStateSet(getStateSet());
 179     state.apply();
 180     state.setActiveTextureUnit(0);
 181     state.setClientActiveTextureUnit(0);
 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 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     // The number of polygon-offset "units" to place between layers.  In
 357     // principle, one is supposed to be enough.  In practice, I find that
 358     // my hardware/driver requires many more.
 359     osg::PolygonOffset::setUnitsMultiplier(1);
 360     osg::PolygonOffset::setFactorMultiplier(1);
 361
 362     // Go full screen if requested ...
 363     if ( fgGetBool("/sim/startup/fullscreen") )
 364         fgOSFullScreen();
 365
 366     if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
 367          (!fgGetBool("/sim/rendering/shading"))) {
 368         // if fastest fog requested, or if flat shading force fastest
 369         glHint ( GL_FOG_HINT, GL_FASTEST );
 370     } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
 371         glHint ( GL_FOG_HINT, GL_DONT_CARE );
 372     }
 373
 374     glHint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 375     glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 376     glHint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 377
 378     sceneView->setDefaults(osgUtil::SceneView::COMPILE_GLOBJECTS_AT_INIT);
 379
 380     mFog->setMode(osg::Fog::EXP2);
 381     mRunwayLightingFog->setMode(osg::Fog::EXP2);
 382     mTaxiLightingFog->setMode(osg::Fog::EXP2);
 383     mGroundLightingFog->setMode(osg::Fog::EXP2);
 384
 385     sceneView->setFrameStamp(mFrameStamp.get());
 386
 387     mUpdateVisitor = new SGUpdateVisitor;
 388     sceneView->setUpdateVisitor(mUpdateVisitor.get());
 389
 390     sceneView->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 391     sceneView->getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 392     sceneView->getCamera()->setClearMask(GL_COLOR_BUFFER_BIT);
 393
 394     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 395
 396     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 397
 398     stateSet->setAttribute(new osg::Depth(osg::Depth::LEQUAL));
 399     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 400
 401     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 402     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 403     stateSet->setAttribute(new osg::BlendFunc);
 404     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 405
 406     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 407
 408     // this will be set below
 409     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 410
 411     osg::Material* material = new osg::Material;
 412     stateSet->setAttribute(material);
 413
 414     stateSet->setTextureAttribute(0, new osg::TexEnv);
 415     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 416
 417
 418 //     stateSet->setAttribute(new osg::CullFace(osg::CullFace::BACK));
 419 //     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
 420
 421
 422     // this is the topmost scenegraph node for osg
 423     mBackGroundCamera->addChild(thesky->getPreRoot());
 424     mBackGroundCamera->setClearMask(0);
 425
 426     GLbitfield inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 427     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 428     inheritanceMask &= ~osg::CullSettings::NEAR_FAR_RATIO;
 429     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 430     mBackGroundCamera->setInheritanceMask(inheritanceMask);
 431     mBackGroundCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 432     mBackGroundCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 433     mBackGroundCamera->setRenderOrder(osg::CameraNode::NESTED_RENDER);
 434
 435     mBackGroundCamera->getOrCreateStateSet()->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 436
 437     mRoot->addChild(mBackGroundCamera.get());
 438
 439     mSceneCamera->setClearMask(GL_DEPTH_BUFFER_BIT);
 440     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 441     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 442     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 443     mSceneCamera->setInheritanceMask(inheritanceMask);
 444     mSceneCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 445     mSceneCamera->setCullingMode(osg::CullSettings::DEFAULT_CULLING);
 446     mSceneCamera->setRenderOrder(osg::CameraNode::NESTED_RENDER);
 447     mRoot->addChild(mSceneCamera.get());
 448
 449     stateSet = mSceneCamera->getOrCreateStateSet();
 450     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 451     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 452
 453     // need to update the light on every frame
 454     osg::LightSource* lightSource = new osg::LightSource;
 455     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 456     // relative because of CameraView being just a clever transform node
 457     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 458     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 459     mSceneCamera->addChild(lightSource);
 460
 461     lightSource->addChild(globals->get_scenery()->get_scene_graph());
 462     lightSource->addChild(thesky->getCloudRoot());
 463
 464     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 465     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 466     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 467     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 468     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 469
 470     // enable disable specular highlights.
 471     // is the place where we might plug in an other fragment shader ...
 472     osg::LightModel* lightModel = new osg::LightModel;
 473     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 474     stateSet->setAttribute(lightModel);
 475
 476     // switch to enable wireframe
 477     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 478     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 479     stateSet->setAttributeAndModes(polygonMode);
 480
 481     // scene fog handling
 482     stateSet->setAttributeAndModes(mFog.get());
 483     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 484
 485     // plug in the GUI
 486     osg::CameraNode* guiCamera = new osg::CameraNode;
 487     guiCamera->setRenderOrder(osg::CameraNode::POST_RENDER);
 488     guiCamera->setClearMask(0);
 489     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 490     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 491     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 492     guiCamera->setInheritanceMask(inheritanceMask);
 493     guiCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 494     guiCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 495     mRoot->addChild(guiCamera);
 496     osg::Geode* geode = new osg::Geode;
 497     geode->addDrawable(new SGPuDrawable);
 498     geode->addDrawable(new SGHUDAndPanelDrawable);
 499     guiCamera->addChild(geode);
 500
 501     // this one contains all lights, here we set the light states we did
 502     // in the plib case with plain OpenGL
 503     osg::Group* lightGroup = new osg::Group;
 504     mSceneCamera->addChild(lightGroup);
 505     lightGroup->addChild(globals->get_scenery()->get_gnd_lights_root());
 506     lightGroup->addChild(globals->get_scenery()->get_vasi_lights_root());
 507     lightGroup->addChild(globals->get_scenery()->get_rwy_lights_root());
 508     lightGroup->addChild(globals->get_scenery()->get_taxi_lights_root());
 509
 510     stateSet = globals->get_scenery()->get_gnd_lights_root()->getOrCreateStateSet();
 511     stateSet->setAttributeAndModes(mFog.get());
 512     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 513     stateSet = globals->get_scenery()->get_vasi_lights_root()->getOrCreateStateSet();
 514     stateSet->setAttributeAndModes(mRunwayLightingFog.get());
 515     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 516     stateSet = globals->get_scenery()->get_rwy_lights_root()->getOrCreateStateSet();
 517     stateSet->setAttributeAndModes(mRunwayLightingFog.get());
 518     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 519     stateSet = globals->get_scenery()->get_taxi_lights_root()->getOrCreateStateSet();
 520     stateSet->setAttributeAndModes(mTaxiLightingFog.get());
 521     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 522
 523     mCameraView->addChild(mRoot.get());
 524     sceneView->setSceneData(mCameraView.get());
 525
 526 //  sceneView->getState()->setCheckForGLErrors(osg::State::ONCE_PER_ATTRIBUTE);
 527 }
 528
 529
 530 // Update all Visuals (redraws anything graphics related)
 531 void
 532 FGRenderer::update( bool refresh_camera_settings ) {
 533     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 534                           || fgGetBool("sim/sceneryloaded-override");
 535
 536     if ( idle_state < 1000 || !scenery_loaded ) {
 537         if (sceneView.valid() && sceneView->getState()) {
 538             sceneView->getState()->setActiveTextureUnit(0);
 539             sceneView->getState()->setClientActiveTextureUnit(0);
 540         }
 541         // still initializing, draw the splash screen
 542         glPushAttrib(GL_ALL_ATTRIB_BITS);
 543         glPushClientAttrib(~0u);
 544
 545         fgSplashUpdate(1.0);
 546
 547         glPopClientAttrib();
 548         glPopAttrib();
 549
 550         // Keep resetting sim time while the sim is initializing
 551         globals->set_sim_time_sec( 0.0 );
 552         return;
 553     }
 554
 555     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 556     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 557     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 558     bool distance_attenuation
 559         = fgGetBool("/sim/rendering/distance-attenuation");
 560     // OSGFIXME
 561     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 562                                   distance_attenuation );
 563
 564     static const SGPropertyNode *groundlevel_nearplane
 565         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 566
 567     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 568
 569     // update fog params
 570     double actual_visibility;
 571     if (fgGetBool("/environment/clouds/status")) {
 572         actual_visibility = thesky->get_visibility();
 573     } else {
 574         actual_visibility = fgGetDouble("/environment/visibility-m");
 575     }
 576
 577     static double last_visibility = -9999;
 578     if ( actual_visibility != last_visibility ) {
 579         last_visibility = actual_visibility;
 580
 581         fog_exp_density = m_log01 / actual_visibility;
 582         fog_exp2_density = sqrt_m_log01 / actual_visibility;
 583         ground_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 584         if ( actual_visibility < 8000 ) {
 585             rwy_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 2.5);
 586             taxi_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 587         } else {
 588             rwy_exp2_punch_through = sqrt_m_log01 / ( 8000 * 2.5 );
 589             taxi_exp2_punch_through = sqrt_m_log01 / ( 8000 * 1.5 );
 590         }
 591         mFog->setDensity(fog_exp2_density);
 592         mRunwayLightingFog->setDensity(rwy_exp2_punch_through);
 593         mTaxiLightingFog->setDensity(taxi_exp2_punch_through);
 594         mGroundLightingFog->setDensity(ground_exp2_punch_through);
 595     }
 596
 597     // idle_state is now 1000 meaning we've finished all our
 598     // initializations and are running the main loop, so this will
 599     // now work without seg faulting the system.
 600
 601     FGViewer *current__view = globals->get_current_view();
 602     // Force update of center dependent values ...
 603     current__view->set_dirty();
 604
 605     if ( refresh_camera_settings ) {
 606         // update view port
 607         resize( fgGetInt("/sim/startup/xsize"),
 608                 fgGetInt("/sim/startup/ysize") );
 609
 610         SGVec3d center = globals->get_scenery()->get_center();
 611         SGVec3d position = current__view->getViewPosition();
 612         SGQuatd attitude = current__view->getViewOrientation();
 613         SGVec3d osgPosition = attitude.transform(center - position);
 614         mCameraView->setPosition(osgPosition.osg());
 615         mCameraView->setAttitude(inverse(attitude).osg());
 616     }
 617
 618     if ( skyblend ) {
 619         if ( fgGetBool("/sim/rendering/textures") ) {
 620             SGVec4f clearColor(l->adj_fog_color());
 621             sceneView->getCamera()->setClearColor(clearColor.osg());
 622         }
 623     } else {
 624         SGVec4f clearColor(l->sky_color());
 625         sceneView->getCamera()->setClearColor(clearColor.osg());
 626     }
 627
 628     // update fog params if visibility has changed
 629     double visibility_meters = fgGetDouble("/environment/visibility-m");
 630     thesky->set_visibility(visibility_meters);
 631
 632     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 633                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 634                         / (double)fgGetInt("/sim/model-hz") );
 635
 636     // update the sky dome
 637     if ( skyblend ) {
 638
 639         // The sun and moon distances are scaled down versions
 640         // of the actual distance to get both the moon and the sun
 641         // within the range of the far clip plane.
 642         // Moon distance:    384,467 kilometers
 643         // Sun distance: 150,000,000 kilometers
 644
 645         double sun_horiz_eff, moon_horiz_eff;
 646         if (fgGetBool("/sim/rendering/horizon-effect")) {
 647            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 648            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 649         } else {
 650            sun_horiz_eff = moon_horiz_eff = 1.0;
 651         }
 652
 653         static SGSkyState sstate;
 654
 655         sstate.view_pos  = current__view->get_view_pos();
 656         sstate.zero_elev = current__view->get_zero_elev();
 657         sstate.view_up   = current__view->get_world_up();
 658         sstate.lon       = current__view->getLongitude_deg()
 659                             * SGD_DEGREES_TO_RADIANS;
 660         sstate.lat       = current__view->getLatitude_deg()
 661                             * SGD_DEGREES_TO_RADIANS;
 662         sstate.alt       = current__view->getAltitudeASL_ft()
 663                             * SG_FEET_TO_METER;
 664         sstate.spin      = l->get_sun_rotation();
 665         sstate.gst       = globals->get_time_params()->getGst();
 666         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 667         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 668         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 669         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 670         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 671         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 672         sstate.sun_angle = l->get_sun_angle();
 673
 674
 675         /*
 676          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 677          << l->sky_color()[0] << " "
 678          << l->sky_color()[1] << " "
 679          << l->sky_color()[2] << " "
 680          << l->sky_color()[3] );
 681         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 682          << l->fog_color()[0] << " "
 683          << l->fog_color()[1] << " "
 684          << l->fog_color()[2] << " "
 685          << l->fog_color()[3] );
 686         SG_LOG( SG_GENERAL, SG_BULK,
 687                 "    sun_angle = " << l->sun_angle
 688          << "    moon_angle = " << l->moon_angle );
 689         */
 690
 691         static SGSkyColor scolor;
 692
 693         scolor.sky_color   = SGVec3f(l->sky_color().data());
 694         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 695         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 696         scolor.sun_angle   = l->get_sun_angle();
 697         scolor.moon_angle  = l->get_moon_angle();
 698         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 699         scolor.nstars      = globals->get_ephem()->getNumStars();
 700         scolor.planet_data = globals->get_ephem()->getPlanets();
 701         scolor.star_data   = globals->get_ephem()->getStars();
 702
 703         thesky->reposition( sstate, delta_time_sec );
 704         thesky->repaint( scolor );
 705
 706         /*
 707         SG_LOG( SG_GENERAL, SG_BULK,
 708                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 709          << view_pos[1] << " " << view_pos[2] );
 710         SG_LOG( SG_GENERAL, SG_BULK,
 711                 "    zero_elev = " << zero_elev[0] << " "
 712          << zero_elev[1] << " " << zero_elev[2]
 713          << " lon = " << cur_fdm_state->get_Longitude()
 714          << " lat = " << cur_fdm_state->get_Latitude() );
 715         SG_LOG( SG_GENERAL, SG_BULK,
 716                 "    sun_rot = " << l->get_sun_rotation
 717          << " gst = " << SGTime::cur_time_params->getGst() );
 718         SG_LOG( SG_GENERAL, SG_BULK,
 719              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 720           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 721           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 722           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 723         */
 724
 725         //OSGFIXME
 726 //         shadows->setupShadows(
 727 //           current__view->getLongitude_deg(),
 728 //           current__view->getLatitude_deg(),
 729 //           globals->get_time_params()->getGst(),
 730 //           globals->get_ephem()->getSunRightAscension(),
 731 //           globals->get_ephem()->getSunDeclination(),
 732 //           l->get_sun_angle());
 733
 734     }
 735
 736     if ( strcmp(fgGetString("/sim/rendering/fog"), "disabled") ) {
 737         SGVec4f color(l->adj_fog_color());
 738         mFog->setColor(color.osg());
 739         mRunwayLightingFog->setColor(color.osg());
 740         mTaxiLightingFog->setColor(color.osg());
 741         mGroundLightingFog->setColor(color.osg());
 742     }
 743
 744
 745 //     sgEnviro.setLight(l->adj_fog_color());
 746
 747     // texture parameters
 748     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
 749
 750     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 751       - current__view->getSGLocation()->get_cur_elev_m();
 752
 753     float scene_nearplane, scene_farplane;
 754     if ( agl > 10.0 ) {
 755         scene_nearplane = 10.0f;
 756         scene_farplane = 120000.0f;
 757     } else {
 758         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 759         scene_farplane = 120000.0f;
 760     }
 761
 762     setNearFar( scene_nearplane, scene_farplane );
 763
 764 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 765 //         current__view->get_world_up(),
 766 //         current__view->getLongitude_deg(),
 767 //         current__view->getLatitude_deg(),
 768 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 769 //         delta_time_sec);
 770
 771     // OSGFIXME
 772 //     sgEnviro.drawLightning();
 773
 774 //        double current_view_origin_airspeed_horiz_kt =
 775 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 776 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 777 //                                * SGD_DEGREES_TO_RADIANS);
 778        // TODO:find the real view speed, not the AC one
 779 //     sgEnviro.drawPrecipitation(
 780 //         fgGetDouble("/environment/metar/rain-norm", 0.0),
 781 //         fgGetDouble("/environment/metar/snow-norm", 0.0),
 782 //         fgGetDouble("/environment/metar/hail-norm", 0.0),
 783 //         current__view->getPitch_deg() + current__view->getPitchOffset_deg(),
 784 //         current__view->getRoll_deg() + current__view->getRollOffset_deg(),
 785 //         - current__view->getHeadingOffset_deg(),
 786 //                current_view_origin_airspeed_horiz_kt
 787 //                );
 788
 789     // OSGFIXME
 790 //     if( is_internal )
 791 //         shadows->endOfFrame();
 792
 793     // need to call the update visitor once
 794     globals->get_aircraft_model()->select( true );
 795     FGTileMgr::set_tile_filter( true );
 796     mFrameStamp->setReferenceTime(globals->get_sim_time_sec());
 797     mFrameStamp->setFrameNumber(1+mFrameStamp->getFrameNumber());
 798     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 799     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 800                                 current__view->getViewOrientation());
 801     mUpdateVisitor->setSceneryCenter(globals->get_scenery()->get_center());
 802     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 803     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 804                              l->scene_diffuse(), l->scene_specular());
 805     mUpdateVisitor->setVisibility(actual_visibility);
 806
 807     if (fgGetBool("/sim/panel-hotspots"))
 808       sceneView->setCullMask(~0u);
 809     else
 810       sceneView->setCullMask(~SG_NODEMASK_PICK_BIT);
 811
 812     sceneView->update();
 813     sceneView->cull();
 814     sceneView->draw();
 815 }
 816
 817
 818
 819 // options.cxx needs to see this for toggle_panel()
 820 // Handle new window size or exposure
 821 void
 822 FGRenderer::resize( int width, int height ) {
 823     int view_h;
 824
 825     if ( (!fgGetBool("/sim/virtual-cockpit"))
 826          && fgPanelVisible() && idle_state == 1000 ) {
 827         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 828                              globals->get_current_panel()->getYOffset()) / 768.0);
 829     } else {
 830         view_h = height;
 831     }
 832
 833     sceneView->getViewport()->setViewport(0, height - view_h, width, view_h);
 834
 835     static int lastwidth = 0;
 836     static int lastheight = 0;
 837     if (width != lastwidth)
 838         fgSetInt("/sim/startup/xsize", lastwidth = width);
 839     if (height != lastheight)
 840         fgSetInt("/sim/startup/ysize", lastheight = height);
 841
 842     guiInitMouse(width, height);
 843
 844     // for all views
 845     FGViewMgr *viewmgr = globals->get_viewmgr();
 846     if (viewmgr) {
 847       for ( int i = 0; i < viewmgr->size(); ++i ) {
 848         viewmgr->get_view(i)->
 849           set_aspect_ratio((float)view_h / (float)width);
 850       }
 851
 852       setFOV( viewmgr->get_current_view()->get_h_fov(),
 853               viewmgr->get_current_view()->get_v_fov() );
 854     }
 855 }
 856
 857
 858 // These are wrapper functions around ssgSetNearFar() and ssgSetFOV()
 859 // which will post process and rewrite the resulting frustum if we
 860 // want to do asymmetric view frustums.
 861
 862 static void fgHackFrustum() {
 863
 864     // specify a percent of the configured view frustum to actually
 865     // display.  This is a bit of a hack to achieve asymmetric view
 866     // frustums.  For instance, if you want to display two monitors
 867     // side by side, you could specify each with a double fov, a 0.5
 868     // aspect ratio multiplier, and then the left side monitor would
 869     // have a left_pct = 0.0, a right_pct = 0.5, a bottom_pct = 0.0,
 870     // and a top_pct = 1.0.  The right side monitor would have a
 871     // left_pct = 0.5 and a right_pct = 1.0.
 872
 873     static SGPropertyNode *left_pct
 874         = fgGetNode("/sim/current-view/frustum-left-pct");
 875     static SGPropertyNode *right_pct
 876         = fgGetNode("/sim/current-view/frustum-right-pct");
 877     static SGPropertyNode *bottom_pct
 878         = fgGetNode("/sim/current-view/frustum-bottom-pct");
 879     static SGPropertyNode *top_pct
 880         = fgGetNode("/sim/current-view/frustum-top-pct");
 881
 882     double left, right;
 883     double bottom, top;
 884     double zNear, zFar;
 885     sceneView->getProjectionMatrixAsFrustum(left, right, bottom, top, zNear, zFar);
 886     // cout << " l = " << f->getLeft()
 887     //      << " r = " << f->getRight()
 888     //      << " b = " << f->getBot()
 889     //      << " t = " << f->getTop()
 890     //      << " n = " << f->getNear()
 891     //      << " f = " << f->getFar()
 892     //      << endl;
 893
 894     double width = right - left;
 895     double height = top - bottom;
 896
 897     double l, r, t, b;
 898
 899     if ( left_pct != NULL ) {
 900         l = left + width * left_pct->getDoubleValue();
 901     } else {
 902         l = left;
 903     }
 904
 905     if ( right_pct != NULL ) {
 906         r = left + width * right_pct->getDoubleValue();
 907     } else {
 908         r = right;
 909     }
 910
 911     if ( bottom_pct != NULL ) {
 912         b = bottom + height * bottom_pct->getDoubleValue();
 913     } else {
 914         b = bottom;
 915     }
 916
 917     if ( top_pct != NULL ) {
 918         t = bottom + height * top_pct->getDoubleValue();
 919     } else {
 920         t = top;
 921     }
 922
 923     sceneView->setProjectionMatrixAsFrustum(l, r, b, t, zNear, zFar);
 924 }
 925
 926
 927 // we need some static storage space for these values.  However, we
 928 // can't store it in a renderer class object because the functions
 929 // that manipulate these are static.  They are static so they can
 930 // interface to the display callback system.  There's probably a
 931 // better way, there has to be a better way, but I'm not seeing it
 932 // right now.
 933 static float fov_width = 55.0;
 934 static float fov_height = 42.0;
 935 static float fov_near = 1.0;
 936 static float fov_far = 1000.0;
 937
 938
 939 /** FlightGear code should use this routine to set the FOV rather than
 940  *  calling the ssg routine directly
 941  */
 942 void FGRenderer::setFOV( float w, float h ) {
 943     fov_width = w;
 944     fov_height = h;
 945
 946     sceneView->setProjectionMatrixAsPerspective(fov_height,
 947                                                 fov_width/fov_height,
 948                                                 fov_near, fov_far);
 949     // fully specify the view frustum before hacking it (so we don't
 950     // accumulate hacked effects
 951     fgHackFrustum();
 952 //     sgEnviro.setFOV( w, h );
 953 }
 954
 955
 956 /** FlightGear code should use this routine to set the Near/Far clip
 957  *  planes rather than calling the ssg routine directly
 958  */
 959 void FGRenderer::setNearFar( float n, float f ) {
 960 // OSGFIXME: we have currently too much z-buffer fights
 961 n = 0.2;
 962     fov_near = n;
 963     fov_far = f;
 964
 965     sceneView->setProjectionMatrixAsPerspective(fov_height,
 966                                                 fov_width/fov_height,
 967                                                 fov_near, fov_far);
 968
 969     sceneView->getCamera()->setNearFarRatio(fov_near/fov_far);
 970     mSceneCamera->setNearFarRatio(fov_near/fov_far);
 971
 972     // fully specify the view frustum before hacking it (so we don't
 973     // accumulate hacked effects
 974     fgHackFrustum();
 975 }
 976
 977 bool FGRenderer::getPickInfo( SGVec3d& pt, SGVec3d& dir,
 978                               unsigned x, unsigned y )
 979 {
 980   // Get the matrices involved in the transform from global to screen
 981   // coordinates.
 982   osg::Matrix pm = sceneView->getCamera()->getProjectionMatrix();
 983
 984   osg::Matrix mv;
 985   osg::NodePathList paths;
 986   paths = globals->get_scenery()->get_scene_graph()->getParentalNodePaths();
 987   if (!paths.empty()) {
 988     // Ok, we know that this should not have multiple parents ...
 989     // FIXME: is this allways true?
 990     mv = osg::computeLocalToEye(sceneView->getCamera()->getViewMatrix(),
 991                                 paths.front(), false);
 992   }
 993
 994   // Compose and invert
 995   osg::Matrix m = osg::Matrix::inverse(mv*pm);
 996
 997   // Get the width and height of the display to be able to normalize the
 998   // mouse coordinate
 999   float width = fgGetInt("/sim/startup/xsize");
1000   float height = fgGetInt("/sim/startup/ysize");
1001
1002   // Compute some coordinates of in the line from the eyepoint to the
1003   // mouse click coodinates.
1004   // First build the normalized projection coordinates
1005   osg::Vec4 normPt((2*x - width)/width, -(2*y - height)/height, 1, 1);
1006   // Transform them into the real world
1007   osg::Vec4 worldPt4 = m.preMult(normPt);
1008   if (fabs(worldPt4[3]) < SGLimitsf::min())
1009     return false;
1010   SGVec3f worldPt(worldPt4[0]/worldPt4[3],
1011                   worldPt4[1]/worldPt4[3],
1012                   worldPt4[2]/worldPt4[3]);
1013
1014   // Now build a direction from the point
1015   FGViewer* view = globals->get_current_view();
1016   dir = normalize(toVec3d(worldPt - SGVec3f(view->get_view_pos())));
1017
1018   // Copy the start point
1019   pt = SGVec3d(view->get_absolute_view_pos());
1020
1021   // OSGFIXME: ist this sufficient??? especially the precision problems here??
1022 // bool mSceneView->projectWindowXYIntoObject(int x,int y,osg::Vec3& near_point,osg::Vec3& far_point) const;
1023
1024
1025   return true;
1026 }
1027
1028 // end of renderer.cxx
1029