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