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