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/Camera>
  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 #include <osgUtil/IntersectVisitor>
  57
  58 #include <osg/io_utils>
  59 #include <osgDB/WriteFile>
  60 #include <osgDB/ReadFile>
  61 #include <sstream>
  62
  63 #include <simgear/math/SGMath.hxx>
  64 #include <simgear/screen/extensions.hxx>
  65 #include <simgear/scene/material/matlib.hxx>
  66 #include <simgear/scene/model/animation.hxx>
  67 #include <simgear/scene/model/model.hxx>
  68 #include <simgear/scene/model/modellib.hxx>
  69 #include <simgear/scene/model/placement.hxx>
  70 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  71 #include <simgear/scene/tgdb/pt_lights.hxx>
  72 #include <simgear/props/props.hxx>
  73 #include <simgear/timing/sg_time.hxx>
  74 #include <simgear/ephemeris/ephemeris.hxx>
  75 #include <simgear/math/sg_random.h>
  76 #ifdef FG_JPEG_SERVER
  77 #include <simgear/screen/jpgfactory.hxx>
  78 #endif
  79
  80 #include <simgear/environment/visual_enviro.hxx>
  81
  82 #include <Scenery/tileentry.hxx>
  83 #include <Time/light.hxx>
  84 #include <Time/light.hxx>
  85 #include <Aircraft/aircraft.hxx>
  86 #include <Cockpit/panel.hxx>
  87 #include <Cockpit/cockpit.hxx>
  88 #include <Cockpit/hud.hxx>
  89 #include <Model/panelnode.hxx>
  90 #include <Model/modelmgr.hxx>
  91 #include <Model/acmodel.hxx>
  92 #include <Scenery/scenery.hxx>
  93 #include <Scenery/redout.hxx>
  94 #include <Scenery/tilemgr.hxx>
  95 #include <GUI/new_gui.hxx>
  96 #include <Instrumentation/instrument_mgr.hxx>
  97 #include <Instrumentation/HUD/HUD.hxx>
  98
  99 #include "splash.hxx"
 100 #include "renderer.hxx"
 101 #include "main.hxx"
 102
 103 class SGPuDrawable : public osg::Drawable {
 104 public:
 105   SGPuDrawable()
 106   {
 107     // Dynamic stuff, do not store geometry
 108     setUseDisplayList(false);
 109
 110     osg::StateSet* stateSet = getOrCreateStateSet();
 111     stateSet->setRenderBinDetails(1001, "RenderBin");
 112     // speed optimization?
 113     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 114     // We can do translucent menus, so why not. :-)
 115     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 116     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 117     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 118
 119     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 120
 121     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 122     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 123   }
 124   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 125   { drawImplementation(*renderInfo.getState()); }
 126   void drawImplementation(osg::State& state) const
 127   {
 128     state.pushStateSet(getStateSet());
 129     state.apply();
 130     state.setActiveTextureUnit(0);
 131     state.setClientActiveTextureUnit(0);
 132     state.disableAllVertexArrays();
 133
 134     glPushAttrib(GL_ALL_ATTRIB_BITS);
 135     glPushClientAttrib(~0u);
 136
 137     puDisplay();
 138
 139     glPopClientAttrib();
 140     glPopAttrib();
 141
 142     state.popStateSet();
 143     state.dirtyAllModes();
 144     state.dirtyAllAttributes();
 145     state.dirtyAllVertexArrays();
 146   }
 147
 148   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 149   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 150
 151 private:
 152 };
 153
 154 class SGHUDAndPanelDrawable : public osg::Drawable {
 155 public:
 156   SGHUDAndPanelDrawable()
 157   {
 158     // Dynamic stuff, do not store geometry
 159     setUseDisplayList(false);
 160
 161     osg::StateSet* stateSet = getOrCreateStateSet();
 162     stateSet->setRenderBinDetails(1000, "RenderBin");
 163
 164     // speed optimization?
 165     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 166     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 167     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 168     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 169     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 170
 171     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 172   }
 173   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 174   { drawImplementation(*renderInfo.getState()); }
 175   void drawImplementation(osg::State& state) const
 176   {
 177     state.pushStateSet(getStateSet());
 178     state.apply();
 179     state.setActiveTextureUnit(0);
 180     state.setClientActiveTextureUnit(0);
 181     state.disableAllVertexArrays();
 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     state.dirtyAllModes();
 204     state.dirtyAllAttributes();
 205     state.dirtyAllVertexArrays();
 206   }
 207
 208   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 209   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 210
 211 private:
 212 };
 213
 214 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 215 public:
 216   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 217   {
 218     assert(dynamic_cast<osg::LightSource*>(node));
 219     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 220     osg::Light* light = lightSource->getLight();
 221
 222     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 223     light->setAmbient(l->scene_ambient().osg());
 224     light->setDiffuse(l->scene_diffuse().osg());
 225     light->setSpecular(l->scene_specular().osg());
 226     SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 227     light->setPosition(position.osg());
 228     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 229     light->setDirection(direction.osg());
 230     light->setSpotExponent(0);
 231     light->setSpotCutoff(180);
 232     light->setConstantAttenuation(1);
 233     light->setLinearAttenuation(0);
 234     light->setQuadraticAttenuation(0);
 235
 236     traverse(node, nv);
 237   }
 238 };
 239
 240 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 241 public:
 242   FGWireFrameModeUpdateCallback() :
 243     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 244   { }
 245   virtual void operator()(osg::StateAttribute* stateAttribute,
 246                           osg::NodeVisitor*)
 247   {
 248     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 249     osg::PolygonMode* polygonMode;
 250     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 251
 252     if (mWireframe->getBoolValue())
 253       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 254                            osg::PolygonMode::LINE);
 255     else
 256       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 257                            osg::PolygonMode::FILL);
 258   }
 259 private:
 260   SGSharedPtr<SGPropertyNode> mWireframe;
 261 };
 262
 263 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 264 public:
 265   FGLightModelUpdateCallback() :
 266     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 267   { }
 268   virtual void operator()(osg::StateAttribute* stateAttribute,
 269                           osg::NodeVisitor*)
 270   {
 271     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 272     osg::LightModel* lightModel;
 273     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 274
 275 #if 0
 276     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 277     lightModel->setAmbientIntensity(l->scene_ambient().osg());
 278 #else
 279     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 280 #endif
 281     lightModel->setTwoSided(true);
 282     lightModel->setLocalViewer(false);
 283
 284     if (mHighlights->getBoolValue()) {
 285       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 286     } else {
 287       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 288     }
 289   }
 290 private:
 291   SGSharedPtr<SGPropertyNode> mHighlights;
 292 };
 293
 294 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 295 public:
 296   FGFogEnableUpdateCallback() :
 297     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 298   { }
 299   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 300   {
 301     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 302       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 303     } else {
 304       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 305     }
 306   }
 307 private:
 308   SGSharedPtr<SGPropertyNode> mFogEnabled;
 309 };
 310
 311 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 312 public:
 313   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 314   {
 315     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 316     assert(dynamic_cast<osg::Fog*>(sa));
 317     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 318     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 319     fog->setMode(osg::Fog::EXP2);
 320     fog->setColor(updateVisitor->getFogColor().osg());
 321     fog->setDensity(updateVisitor->getFogExp2Density());
 322   }
 323 };
 324
 325 // update callback for the switch node guarding that splash
 326 class FGScenerySwitchCallback : public osg::NodeCallback {
 327 public:
 328   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 329   {
 330     assert(dynamic_cast<osg::Switch*>(node));
 331     osg::Switch* sw = static_cast<osg::Switch*>(node);
 332
 333     double t = globals->get_sim_time_sec();
 334     bool enabled = 0 < t;
 335     sw->setValue(0, enabled);
 336     if (!enabled)
 337       return;
 338     traverse(node, nv);
 339   }
 340 };
 341
 342 // Sky structures
 343 SGSky *thesky;
 344
 345 osg::ref_ptr<osgUtil::SceneView> sceneView = new osgUtil::SceneView;  // This SceneView is used by class FGJpegHttpd ( jpg-httpd.cxx )
 346 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 347 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 348
 349 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 350
 351 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 352
 353 static osg::ref_ptr<osg::CameraView> mCameraView = new osg::CameraView;
 354 static osg::ref_ptr<osg::Camera> mBackGroundCamera = new osg::Camera;
 355
 356 FGRenderer::FGRenderer()
 357 {
 358 #ifdef FG_JPEG_SERVER
 359    jpgRenderFrame = FGRenderer::update;
 360 #endif
 361 }
 362
 363 FGRenderer::~FGRenderer()
 364 {
 365 #ifdef FG_JPEG_SERVER
 366    jpgRenderFrame = NULL;
 367 #endif
 368 }
 369
 370 // Initialize various GL/view parameters
 371 void
 372 FGRenderer::splashinit( void ) {
 373    // Add the splash screen node
 374    mRealRoot->addChild(fgCreateSplashNode());
 375    sceneView->setSceneData(mRealRoot.get());
 376
 377    sceneView->setDefaults(osgUtil::SceneView::COMPILE_GLOBJECTS_AT_INIT);
 378    sceneView->setFrameStamp(mFrameStamp.get());
 379    sceneView->setUpdateVisitor(mUpdateVisitor.get());
 380 }
 381
 382 void
 383 FGRenderer::init( void ) {
 384
 385     osg::initNotifyLevel();
 386
 387     // The number of polygon-offset "units" to place between layers.  In
 388     // principle, one is supposed to be enough.  In practice, I find that
 389     // my hardware/driver requires many more.
 390     osg::PolygonOffset::setUnitsMultiplier(1);
 391     osg::PolygonOffset::setFactorMultiplier(1);
 392
 393     // Go full screen if requested ...
 394     if ( fgGetBool("/sim/startup/fullscreen") )
 395         fgOSFullScreen();
 396
 397     if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
 398          (!fgGetBool("/sim/rendering/shading"))) {
 399         // if fastest fog requested, or if flat shading force fastest
 400         glHint ( GL_FOG_HINT, GL_FASTEST );
 401     } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
 402         glHint ( GL_FOG_HINT, GL_DONT_CARE );
 403     }
 404
 405     glHint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 406     glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 407     glHint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 408
 409
 410     sceneView->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 411     sceneView->getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 412
 413
 414     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 415
 416     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 417
 418     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 419     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 420
 421     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 422     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 423     stateSet->setAttribute(new osg::BlendFunc);
 424     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 425
 426     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 427
 428     // this will be set below
 429     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 430
 431     osg::Material* material = new osg::Material;
 432     stateSet->setAttribute(material);
 433
 434     stateSet->setTextureAttribute(0, new osg::TexEnv);
 435     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 436
 437
 438 //     stateSet->setAttribute(new osg::CullFace(osg::CullFace::BACK));
 439 //     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
 440
 441     // this is the topmost scenegraph node for osg
 442     mBackGroundCamera->addChild(thesky->getPreRoot());
 443     mBackGroundCamera->setClearMask(0);
 444
 445     GLbitfield inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 446     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 447     inheritanceMask &= ~osg::CullSettings::NEAR_FAR_RATIO;
 448     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 449     mBackGroundCamera->setInheritanceMask(inheritanceMask);
 450     mBackGroundCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 451     mBackGroundCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 452     mBackGroundCamera->setRenderOrder(osg::Camera::NESTED_RENDER);
 453
 454     stateSet = mBackGroundCamera->getOrCreateStateSet();
 455     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 456
 457     osg::Group* sceneGroup = new osg::Group;
 458     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 459     sceneGroup->addChild(thesky->getCloudRoot());
 460
 461     stateSet = sceneGroup->getOrCreateStateSet();
 462     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 463     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 464
 465     // need to update the light on every frame
 466     osg::LightSource* lightSource = new osg::LightSource;
 467     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 468     // relative because of CameraView being just a clever transform node
 469     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 470     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 471     mRoot->addChild(lightSource);
 472
 473     lightSource->addChild(mBackGroundCamera.get());
 474     lightSource->addChild(sceneGroup);
 475
 476
 477     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 478     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 479     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 480     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 481     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 482
 483     // enable disable specular highlights.
 484     // is the place where we might plug in an other fragment shader ...
 485     osg::LightModel* lightModel = new osg::LightModel;
 486     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 487     stateSet->setAttribute(lightModel);
 488
 489     // switch to enable wireframe
 490     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 491     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 492     stateSet->setAttributeAndModes(polygonMode);
 493
 494     // scene fog handling
 495     osg::Fog* fog = new osg::Fog;
 496     fog->setUpdateCallback(new FGFogUpdateCallback);
 497     stateSet->setAttributeAndModes(fog);
 498     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 499
 500     // plug in the GUI
 501     osg::Camera* guiCamera = new osg::Camera;
 502     guiCamera->setRenderOrder(osg::Camera::POST_RENDER, 100);
 503     guiCamera->setClearMask(0);
 504     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 505     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 506     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 507     guiCamera->setInheritanceMask(inheritanceMask);
 508     guiCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 509     guiCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 510     osg::Geode* geode = new osg::Geode;
 511     geode->addDrawable(new SGPuDrawable);
 512     geode->addDrawable(new SGHUDAndPanelDrawable);
 513     guiCamera->addChild(geode);
 514
 515     mCameraView->addChild(mRoot.get());
 516
 517     osg::Switch* sw = new osg::Switch;
 518     sw->setUpdateCallback(new FGScenerySwitchCallback);
 519     sw->addChild(mCameraView.get());
 520
 521     mRealRoot->addChild(sw);
 522     mRealRoot->addChild(FGCreateRedoutNode());
 523     mRealRoot->addChild(guiCamera);
 524 }
 525
 526
 527 // Update all Visuals (redraws anything graphics related)
 528 void
 529 FGRenderer::update( bool refresh_camera_settings ) {
 530     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 531                           || fgGetBool("sim/sceneryloaded-override");
 532
 533     if ( idle_state < 1000 || !scenery_loaded ) {
 534         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 535
 536         // Keep resetting sim time while the sim is initializing
 537         globals->set_sim_time_sec( 0.0 );
 538
 539         // the splash screen is now in the scenegraph
 540         sceneView->update();
 541         sceneView->cull();
 542         sceneView->draw();
 543
 544         return;
 545     }
 546
 547     // Fade out the splash screen over the first three seconds.
 548     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 549     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 550
 551     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 552     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 553     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 554     bool distance_attenuation
 555         = fgGetBool("/sim/rendering/distance-attenuation");
 556     // OSGFIXME
 557     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 558                                   distance_attenuation );
 559
 560     static const SGPropertyNode *groundlevel_nearplane
 561         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 562
 563     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 564
 565     // update fog params
 566     double actual_visibility;
 567     if (fgGetBool("/environment/clouds/status")) {
 568         actual_visibility = thesky->get_visibility();
 569     } else {
 570         actual_visibility = fgGetDouble("/environment/visibility-m");
 571     }
 572
 573     // idle_state is now 1000 meaning we've finished all our
 574     // initializations and are running the main loop, so this will
 575     // now work without seg faulting the system.
 576
 577     FGViewer *current__view = globals->get_current_view();
 578     // Force update of center dependent values ...
 579     current__view->set_dirty();
 580
 581     if ( refresh_camera_settings ) {
 582         // update view port
 583         resize( fgGetInt("/sim/startup/xsize"),
 584                 fgGetInt("/sim/startup/ysize") );
 585
 586         SGVec3d position = current__view->getViewPosition();
 587         SGQuatd attitude = current__view->getViewOrientation();
 588         SGVec3d osgPosition = attitude.transform(-position);
 589         mCameraView->setPosition(osgPosition.osg());
 590         mCameraView->setAttitude(inverse(attitude).osg());
 591     }
 592
 593     if ( skyblend ) {
 594         if ( fgGetBool("/sim/rendering/textures") ) {
 595             SGVec4f clearColor(l->adj_fog_color());
 596             sceneView->getCamera()->setClearColor(clearColor.osg());
 597         }
 598     } else {
 599         SGVec4f clearColor(l->sky_color());
 600         sceneView->getCamera()->setClearColor(clearColor.osg());
 601     }
 602
 603     // update fog params if visibility has changed
 604     double visibility_meters = fgGetDouble("/environment/visibility-m");
 605     thesky->set_visibility(visibility_meters);
 606
 607     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 608                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 609                         / (double)fgGetInt("/sim/model-hz") );
 610
 611     // update the sky dome
 612     if ( skyblend ) {
 613
 614         // The sun and moon distances are scaled down versions
 615         // of the actual distance to get both the moon and the sun
 616         // within the range of the far clip plane.
 617         // Moon distance:    384,467 kilometers
 618         // Sun distance: 150,000,000 kilometers
 619
 620         double sun_horiz_eff, moon_horiz_eff;
 621         if (fgGetBool("/sim/rendering/horizon-effect")) {
 622            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 623            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 624         } else {
 625            sun_horiz_eff = moon_horiz_eff = 1.0;
 626         }
 627
 628         static SGSkyState sstate;
 629
 630         sstate.view_pos  = toVec3f(current__view->get_view_pos());
 631         sstate.zero_elev = toVec3f(current__view->get_zero_elev());
 632         sstate.view_up   = current__view->get_world_up();
 633         sstate.lon       = current__view->getLongitude_deg()
 634                             * SGD_DEGREES_TO_RADIANS;
 635         sstate.lat       = current__view->getLatitude_deg()
 636                             * SGD_DEGREES_TO_RADIANS;
 637         sstate.alt       = current__view->getAltitudeASL_ft()
 638                             * SG_FEET_TO_METER;
 639         sstate.spin      = l->get_sun_rotation();
 640         sstate.gst       = globals->get_time_params()->getGst();
 641         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 642         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 643         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 644         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 645         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 646         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 647         sstate.sun_angle = l->get_sun_angle();
 648
 649
 650         /*
 651          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 652          << l->sky_color()[0] << " "
 653          << l->sky_color()[1] << " "
 654          << l->sky_color()[2] << " "
 655          << l->sky_color()[3] );
 656         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 657          << l->fog_color()[0] << " "
 658          << l->fog_color()[1] << " "
 659          << l->fog_color()[2] << " "
 660          << l->fog_color()[3] );
 661         SG_LOG( SG_GENERAL, SG_BULK,
 662                 "    sun_angle = " << l->sun_angle
 663          << "    moon_angle = " << l->moon_angle );
 664         */
 665
 666         static SGSkyColor scolor;
 667
 668         scolor.sky_color   = SGVec3f(l->sky_color().data());
 669         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 670         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 671         scolor.sun_angle   = l->get_sun_angle();
 672         scolor.moon_angle  = l->get_moon_angle();
 673         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 674         scolor.nstars      = globals->get_ephem()->getNumStars();
 675         scolor.planet_data = globals->get_ephem()->getPlanets();
 676         scolor.star_data   = globals->get_ephem()->getStars();
 677
 678         thesky->reposition( sstate, delta_time_sec );
 679         thesky->repaint( scolor );
 680
 681         /*
 682         SG_LOG( SG_GENERAL, SG_BULK,
 683                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 684          << view_pos[1] << " " << view_pos[2] );
 685         SG_LOG( SG_GENERAL, SG_BULK,
 686                 "    zero_elev = " << zero_elev[0] << " "
 687          << zero_elev[1] << " " << zero_elev[2]
 688          << " lon = " << cur_fdm_state->get_Longitude()
 689          << " lat = " << cur_fdm_state->get_Latitude() );
 690         SG_LOG( SG_GENERAL, SG_BULK,
 691                 "    sun_rot = " << l->get_sun_rotation
 692          << " gst = " << SGTime::cur_time_params->getGst() );
 693         SG_LOG( SG_GENERAL, SG_BULK,
 694              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 695           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 696           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 697           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 698         */
 699
 700         //OSGFIXME
 701 //         shadows->setupShadows(
 702 //           current__view->getLongitude_deg(),
 703 //           current__view->getLatitude_deg(),
 704 //           globals->get_time_params()->getGst(),
 705 //           globals->get_ephem()->getSunRightAscension(),
 706 //           globals->get_ephem()->getSunDeclination(),
 707 //           l->get_sun_angle());
 708
 709     }
 710
 711 //     sgEnviro.setLight(l->adj_fog_color());
 712
 713     // texture parameters
 714     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
 715
 716     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 717       - current__view->getSGLocation()->get_cur_elev_m();
 718
 719     float scene_nearplane, scene_farplane;
 720     if ( agl > 10.0 ) {
 721         scene_nearplane = 10.0f;
 722         scene_farplane = 120000.0f;
 723     } else {
 724         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 725         scene_farplane = 120000.0f;
 726     }
 727     setNearFar( scene_nearplane, scene_farplane );
 728
 729 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 730 //         current__view->get_world_up(),
 731 //         current__view->getLongitude_deg(),
 732 //         current__view->getLatitude_deg(),
 733 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 734 //         delta_time_sec);
 735
 736     // OSGFIXME
 737 //     sgEnviro.drawLightning();
 738
 739 //        double current_view_origin_airspeed_horiz_kt =
 740 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 741 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 742 //                                * SGD_DEGREES_TO_RADIANS);
 743        // TODO:find the real view speed, not the AC one
 744 //     sgEnviro.drawPrecipitation(
 745 //         fgGetDouble("/environment/metar/rain-norm", 0.0),
 746 //         fgGetDouble("/environment/metar/snow-norm", 0.0),
 747 //         fgGetDouble("/environment/metar/hail-norm", 0.0),
 748 //         current__view->getPitch_deg() + current__view->getPitchOffset_deg(),
 749 //         current__view->getRoll_deg() + current__view->getRollOffset_deg(),
 750 //         - current__view->getHeadingOffset_deg(),
 751 //                current_view_origin_airspeed_horiz_kt
 752 //                );
 753
 754     // OSGFIXME
 755 //     if( is_internal )
 756 //         shadows->endOfFrame();
 757
 758     // need to call the update visitor once
 759     mFrameStamp->setReferenceTime(globals->get_sim_time_sec());
 760     mFrameStamp->setFrameNumber(1+mFrameStamp->getFrameNumber());
 761     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 762     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 763                                 current__view->getViewOrientation());
 764     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 765     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 766                              l->scene_diffuse(), l->scene_specular(),
 767                              l->adj_fog_color(),
 768                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 769     mUpdateVisitor->setVisibility(actual_visibility);
 770
 771     if (fgGetBool("/sim/panel-hotspots"))
 772       sceneView->setCullMask(sceneView->getCullMask()|SG_NODEMASK_PICK_BIT);
 773     else
 774       sceneView->setCullMask(sceneView->getCullMask()&(~SG_NODEMASK_PICK_BIT));
 775
 776     sceneView->update();
 777     sceneView->cull();
 778     sceneView->draw();
 779 }
 780
 781
 782
 783 // options.cxx needs to see this for toggle_panel()
 784 // Handle new window size or exposure
 785 void
 786 FGRenderer::resize( int width, int height ) {
 787     int view_h;
 788
 789     if ( (!fgGetBool("/sim/virtual-cockpit"))
 790          && fgPanelVisible() && idle_state == 1000 ) {
 791         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 792                              globals->get_current_panel()->getYOffset()) / 768.0);
 793     } else {
 794         view_h = height;
 795     }
 796
 797     sceneView->getViewport()->setViewport(0, height - view_h, width, view_h);
 798
 799     static int lastwidth = 0;
 800     static int lastheight = 0;
 801     if (width != lastwidth)
 802         fgSetInt("/sim/startup/xsize", lastwidth = width);
 803     if (height != lastheight)
 804         fgSetInt("/sim/startup/ysize", lastheight = height);
 805
 806     guiInitMouse(width, height);
 807
 808     // for all views
 809     FGViewMgr *viewmgr = globals->get_viewmgr();
 810     if (viewmgr) {
 811       for ( int i = 0; i < viewmgr->size(); ++i ) {
 812         viewmgr->get_view(i)->
 813           set_aspect_ratio((float)view_h / (float)width);
 814       }
 815
 816       setFOV( viewmgr->get_current_view()->get_h_fov(),
 817               viewmgr->get_current_view()->get_v_fov() );
 818     }
 819 }
 820
 821
 822 // These are wrapper functions around ssgSetNearFar() and ssgSetFOV()
 823 // which will post process and rewrite the resulting frustum if we
 824 // want to do asymmetric view frustums.
 825
 826 static void fgHackFrustum() {
 827
 828     // specify a percent of the configured view frustum to actually
 829     // display.  This is a bit of a hack to achieve asymmetric view
 830     // frustums.  For instance, if you want to display two monitors
 831     // side by side, you could specify each with a double fov, a 0.5
 832     // aspect ratio multiplier, and then the left side monitor would
 833     // have a left_pct = 0.0, a right_pct = 0.5, a bottom_pct = 0.0,
 834     // and a top_pct = 1.0.  The right side monitor would have a
 835     // left_pct = 0.5 and a right_pct = 1.0.
 836
 837     static SGPropertyNode *left_pct
 838         = fgGetNode("/sim/current-view/frustum-left-pct");
 839     static SGPropertyNode *right_pct
 840         = fgGetNode("/sim/current-view/frustum-right-pct");
 841     static SGPropertyNode *bottom_pct
 842         = fgGetNode("/sim/current-view/frustum-bottom-pct");
 843     static SGPropertyNode *top_pct
 844         = fgGetNode("/sim/current-view/frustum-top-pct");
 845
 846     double left, right;
 847     double bottom, top;
 848     double zNear, zFar;
 849     sceneView->getProjectionMatrixAsFrustum(left, right, bottom, top, zNear, zFar);
 850     // cout << " l = " << f->getLeft()
 851     //      << " r = " << f->getRight()
 852     //      << " b = " << f->getBot()
 853     //      << " t = " << f->getTop()
 854     //      << " n = " << f->getNear()
 855     //      << " f = " << f->getFar()
 856     //      << endl;
 857
 858     double width = right - left;
 859     double height = top - bottom;
 860
 861     double l, r, t, b;
 862
 863     if ( left_pct != NULL ) {
 864         l = left + width * left_pct->getDoubleValue();
 865     } else {
 866         l = left;
 867     }
 868
 869     if ( right_pct != NULL ) {
 870         r = left + width * right_pct->getDoubleValue();
 871     } else {
 872         r = right;
 873     }
 874
 875     if ( bottom_pct != NULL ) {
 876         b = bottom + height * bottom_pct->getDoubleValue();
 877     } else {
 878         b = bottom;
 879     }
 880
 881     if ( top_pct != NULL ) {
 882         t = bottom + height * top_pct->getDoubleValue();
 883     } else {
 884         t = top;
 885     }
 886
 887     sceneView->setProjectionMatrixAsFrustum(l, r, b, t, zNear, zFar);
 888 }
 889
 890
 891 // we need some static storage space for these values.  However, we
 892 // can't store it in a renderer class object because the functions
 893 // that manipulate these are static.  They are static so they can
 894 // interface to the display callback system.  There's probably a
 895 // better way, there has to be a better way, but I'm not seeing it
 896 // right now.
 897 static float fov_width = 55.0;
 898 static float fov_height = 42.0;
 899 static float fov_near = 1.0;
 900 static float fov_far = 1000.0;
 901
 902
 903 /** FlightGear code should use this routine to set the FOV rather than
 904  *  calling the ssg routine directly
 905  */
 906 void FGRenderer::setFOV( float w, float h ) {
 907     fov_width = w;
 908     fov_height = h;
 909
 910     sceneView->setProjectionMatrixAsPerspective(fov_height,
 911                                                 fov_width/fov_height,
 912                                                 fov_near, fov_far);
 913     // fully specify the view frustum before hacking it (so we don't
 914     // accumulate hacked effects
 915     fgHackFrustum();
 916 //     sgEnviro.setFOV( w, h );
 917 }
 918
 919
 920 /** FlightGear code should use this routine to set the Near/Far clip
 921  *  planes rather than calling the ssg routine directly
 922  */
 923 void FGRenderer::setNearFar( float n, float f ) {
 924 // OSGFIXME: we have currently too much z-buffer fights
 925 n = 0.1;
 926     fov_near = n;
 927     fov_far = f;
 928
 929     sceneView->setProjectionMatrixAsPerspective(fov_height,
 930                                                 fov_width/fov_height,
 931                                                 fov_near, fov_far);
 932
 933     // fully specify the view frustum before hacking it (so we don't
 934     // accumulate hacked effects
 935     fgHackFrustum();
 936 }
 937
 938 bool
 939 FGRenderer::pick( unsigned x, unsigned y,
 940                   std::vector<SGSceneryPick>& pickList )
 941 {
 942   // wipe out the return ...
 943   pickList.resize(0);
 944
 945   // we can get called early ...
 946   if (!sceneView.valid())
 947     return false;
 948
 949   osg::Node* sceneData = globals->get_scenery()->get_scene_graph();
 950   if (!sceneData)
 951     return false;
 952   osg::Viewport* viewport = sceneView->getViewport();
 953   if (!viewport)
 954     return false;
 955
 956   // don't know why, but the update has partly happened somehow,
 957   // so update the scenery part of the viewer
 958   FGViewer *current_view = globals->get_current_view();
 959   // Force update of center dependent values ...
 960   current_view->set_dirty();
 961   SGVec3d position = current_view->getViewPosition();
 962   SGQuatd attitude = current_view->getViewOrientation();
 963   SGVec3d osgPosition = attitude.transform(-position);
 964   mCameraView->setPosition(osgPosition.osg());
 965   mCameraView->setAttitude(inverse(attitude).osg());
 966
 967   osg::Matrix projection(sceneView->getProjectionMatrix());
 968   osg::Matrix modelview(sceneView->getViewMatrix());
 969
 970   osg::NodePathList nodePath = sceneData->getParentalNodePaths();
 971   // modify the view matrix so that it accounts for this nodePath's
 972   // accumulated transform
 973   if (!nodePath.empty())
 974     modelview.preMult(computeLocalToWorld(nodePath.front()));
 975
 976   // swap the y values ...
 977   y = viewport->height() - y;
 978   // set up the pick visitor
 979   osgUtil::PickVisitor pickVisitor(viewport, projection, modelview, x, y);
 980   sceneData->accept(pickVisitor);
 981   if (!pickVisitor.hits())
 982     return false;
 983
 984   // collect all interaction callbacks on the pick ray.
 985   // They get stored in the pickCallbacks list where they are sorted back
 986   // to front and croasest to finest wrt the scenery node they are attached to
 987   osgUtil::PickVisitor::LineSegmentHitListMap::const_iterator mi;
 988   for (mi = pickVisitor.getSegHitList().begin();
 989        mi != pickVisitor.getSegHitList().end();
 990        ++mi) {
 991     osgUtil::IntersectVisitor::HitList::const_iterator hi;
 992     for (hi = mi->second.begin(); hi != mi->second.end(); ++hi) {
 993       // ok, go back the nodes and ask for intersection callbacks,
 994       // execute them in top down order
 995       const osg::NodePath& np = hi->getNodePath();
 996       osg::NodePath::const_reverse_iterator npi;
 997       for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 998         SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 999         if (!ud)
1000           continue;
1001         for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1002           SGPickCallback* pickCallback = ud->getPickCallback(i);
1003           if (!pickCallback)
1004             continue;
1005           SGSceneryPick sceneryPick;
1006           /// note that this is done totally in doubles instead of
1007           /// just using getWorldIntersectionPoint
1008           osg::Vec3d localPt = hi->getLocalIntersectPoint();
1009           sceneryPick.info.local = SGVec3d(localPt);
1010           if (hi->getMatrix())
1011             sceneryPick.info.wgs84 = SGVec3d(localPt*(*hi->getMatrix()));
1012           else
1013             sceneryPick.info.wgs84 = SGVec3d(localPt);
1014           sceneryPick.callback = pickCallback;
1015           pickList.push_back(sceneryPick);
1016         }
1017       }
1018     }
1019   }
1020
1021   return !pickList.empty();
1022 }
1023
1024 // end of renderer.cxx
1025