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/tilemgr.hxx>
  94 #include <ATC/ATCdisplay.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::State& state) const
 125   {
 126     state.pushStateSet(getStateSet());
 127     state.apply();
 128     state.setActiveTextureUnit(0);
 129     state.setClientActiveTextureUnit(0);
 130     state.disableAllVertexArrays();
 131
 132     glPushAttrib(GL_ALL_ATTRIB_BITS);
 133     glPushClientAttrib(~0u);
 134
 135     if((fgGetBool("/sim/atc/enabled"))
 136        || (fgGetBool("/sim/ai-traffic/enabled")))
 137       globals->get_ATC_display()->update(delta_time_sec, state);
 138
 139     puDisplay();
 140
 141     glPopClientAttrib();
 142     glPopAttrib();
 143
 144     // Fade out the splash screen over the first three seconds.
 145     double t = globals->get_sim_time_sec();
 146     if (t <= 2.5) {
 147       glPushAttrib(GL_ALL_ATTRIB_BITS);
 148       glPushClientAttrib(~0u);
 149
 150       fgSplashUpdate((2.5 - t) / 2.5);
 151
 152       glPopClientAttrib();
 153       glPopAttrib();
 154     }
 155
 156     state.popStateSet();
 157     state.dirtyAllModes();
 158     state.dirtyAllAttributes();
 159     state.dirtyAllVertexArrays();
 160   }
 161
 162   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 163   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 164
 165 private:
 166 };
 167
 168 class SGHUDAndPanelDrawable : public osg::Drawable {
 169 public:
 170   SGHUDAndPanelDrawable()
 171   {
 172     // Dynamic stuff, do not store geometry
 173     setUseDisplayList(false);
 174
 175     osg::StateSet* stateSet = getOrCreateStateSet();
 176     stateSet->setRenderBinDetails(1000, "RenderBin");
 177
 178     // speed optimization?
 179     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 180     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 181     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 182     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 183     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 184
 185     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 186   }
 187   virtual void drawImplementation(osg::State& state) const
 188   {
 189     state.pushStateSet(getStateSet());
 190     state.apply();
 191     state.setActiveTextureUnit(0);
 192     state.setClientActiveTextureUnit(0);
 193     state.disableAllVertexArrays();
 194
 195     glPushAttrib(GL_ALL_ATTRIB_BITS);
 196     glPushClientAttrib(~0u);
 197
 198     fgCockpitUpdate(&state);
 199
 200     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 201     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 202     hud->draw(state);
 203
 204     // update the panel subsystem
 205     if ( globals->get_current_panel() != NULL )
 206         globals->get_current_panel()->update(state);
 207     // We don't need a state here - can be safely removed when we can pick
 208     // correctly
 209     fgUpdate3DPanels();
 210
 211     glPopClientAttrib();
 212     glPopAttrib();
 213
 214     state.popStateSet();
 215     state.dirtyAllModes();
 216     state.dirtyAllAttributes();
 217     state.dirtyAllVertexArrays();
 218   }
 219
 220   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 221   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 222
 223 private:
 224 };
 225
 226 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 227 public:
 228   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 229   {
 230     assert(dynamic_cast<osg::LightSource*>(node));
 231     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 232     osg::Light* light = lightSource->getLight();
 233
 234     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 235     light->setAmbient(l->scene_ambient().osg());
 236     light->setDiffuse(l->scene_diffuse().osg());
 237     light->setSpecular(l->scene_specular().osg());
 238     SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 239     light->setPosition(position.osg());
 240     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 241     light->setDirection(direction.osg());
 242     light->setSpotExponent(0);
 243     light->setSpotCutoff(180);
 244     light->setConstantAttenuation(1);
 245     light->setLinearAttenuation(0);
 246     light->setQuadraticAttenuation(0);
 247
 248     traverse(node, nv);
 249   }
 250 };
 251
 252 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 253 public:
 254   FGWireFrameModeUpdateCallback() :
 255     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 256   { }
 257   virtual void operator()(osg::StateAttribute* stateAttribute,
 258                           osg::NodeVisitor*)
 259   {
 260     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 261     osg::PolygonMode* polygonMode;
 262     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 263
 264     if (mWireframe->getBoolValue())
 265       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 266                            osg::PolygonMode::LINE);
 267     else
 268       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 269                            osg::PolygonMode::FILL);
 270   }
 271 private:
 272   SGSharedPtr<SGPropertyNode> mWireframe;
 273 };
 274
 275 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 276 public:
 277   FGLightModelUpdateCallback() :
 278     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 279   { }
 280   virtual void operator()(osg::StateAttribute* stateAttribute,
 281                           osg::NodeVisitor*)
 282   {
 283     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 284     osg::LightModel* lightModel;
 285     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 286
 287 #if 0
 288     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 289     lightModel->setAmbientIntensity(l->scene_ambient().osg());
 290 #else
 291     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 292 #endif
 293     lightModel->setTwoSided(true);
 294     lightModel->setLocalViewer(false);
 295
 296     if (mHighlights->getBoolValue()) {
 297       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 298     } else {
 299       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 300     }
 301   }
 302 private:
 303   SGSharedPtr<SGPropertyNode> mHighlights;
 304 };
 305
 306 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 307 public:
 308   FGFogEnableUpdateCallback() :
 309     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 310   { }
 311   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 312   {
 313     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 314       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 315     } else {
 316       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 317     }
 318   }
 319 private:
 320   SGSharedPtr<SGPropertyNode> mFogEnabled;
 321 };
 322
 323 // fog constants.  I'm a little nervous about putting actual code out
 324 // here but it seems to work (?)
 325 static const double m_log01 = -log( 0.01 );
 326 static const double sqrt_m_log01 = sqrt( m_log01 );
 327 static GLfloat fog_exp_density;
 328 static GLfloat fog_exp2_density;
 329 static GLfloat rwy_exp2_punch_through;
 330 static GLfloat taxi_exp2_punch_through;
 331 static GLfloat ground_exp2_punch_through;
 332
 333 // Sky structures
 334 SGSky *thesky;
 335
 336 osg::ref_ptr<osgUtil::SceneView> sceneView = new osgUtil::SceneView;  // This SceneView is used by class FGJpegHttpd ( jpg-httpd.cxx )
 337 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 338 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 339
 340 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 341
 342 static osg::ref_ptr<osg::CameraView> mCameraView = new osg::CameraView;
 343 static osg::ref_ptr<osg::Camera> mBackGroundCamera = new osg::Camera;
 344
 345 static osg::ref_ptr<osg::Fog> mFog = new osg::Fog;
 346 static osg::ref_ptr<osg::Fog> mRunwayLightingFog = new osg::Fog;
 347 static osg::ref_ptr<osg::Fog> mTaxiLightingFog = new osg::Fog;
 348 static osg::ref_ptr<osg::Fog> mGroundLightingFog = new osg::Fog;
 349
 350 FGRenderer::FGRenderer()
 351 {
 352 #ifdef FG_JPEG_SERVER
 353    jpgRenderFrame = FGRenderer::update;
 354 #endif
 355 }
 356
 357 FGRenderer::~FGRenderer()
 358 {
 359 #ifdef FG_JPEG_SERVER
 360    jpgRenderFrame = NULL;
 361 #endif
 362 }
 363
 364 // Initialize various GL/view parameters
 365 void
 366 FGRenderer::init( void ) {
 367
 368     osg::initNotifyLevel();
 369
 370     // The number of polygon-offset "units" to place between layers.  In
 371     // principle, one is supposed to be enough.  In practice, I find that
 372     // my hardware/driver requires many more.
 373     osg::PolygonOffset::setUnitsMultiplier(1);
 374     osg::PolygonOffset::setFactorMultiplier(1);
 375
 376     // Go full screen if requested ...
 377     if ( fgGetBool("/sim/startup/fullscreen") )
 378         fgOSFullScreen();
 379
 380     if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
 381          (!fgGetBool("/sim/rendering/shading"))) {
 382         // if fastest fog requested, or if flat shading force fastest
 383         glHint ( GL_FOG_HINT, GL_FASTEST );
 384     } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
 385         glHint ( GL_FOG_HINT, GL_DONT_CARE );
 386     }
 387
 388     glHint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 389     glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 390     glHint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 391
 392     sceneView->setDefaults(osgUtil::SceneView::COMPILE_GLOBJECTS_AT_INIT);
 393
 394     mFog->setMode(osg::Fog::EXP2);
 395     mRunwayLightingFog->setMode(osg::Fog::EXP2);
 396     mTaxiLightingFog->setMode(osg::Fog::EXP2);
 397     mGroundLightingFog->setMode(osg::Fog::EXP2);
 398
 399     sceneView->setFrameStamp(mFrameStamp.get());
 400
 401     mUpdateVisitor = new SGUpdateVisitor;
 402     sceneView->setUpdateVisitor(mUpdateVisitor.get());
 403
 404     sceneView->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 405     sceneView->getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 406
 407
 408     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 409
 410     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 411
 412     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 413     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 414
 415     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 416     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 417     stateSet->setAttribute(new osg::BlendFunc);
 418     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 419
 420     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 421
 422     // this will be set below
 423     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 424
 425     osg::Material* material = new osg::Material;
 426     stateSet->setAttribute(material);
 427
 428     stateSet->setTextureAttribute(0, new osg::TexEnv);
 429     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 430
 431
 432 //     stateSet->setAttribute(new osg::CullFace(osg::CullFace::BACK));
 433 //     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
 434
 435     // this is the topmost scenegraph node for osg
 436     mBackGroundCamera->addChild(thesky->getPreRoot());
 437     mBackGroundCamera->setClearMask(0);
 438
 439     GLbitfield inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 440     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 441     inheritanceMask &= ~osg::CullSettings::NEAR_FAR_RATIO;
 442     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 443     mBackGroundCamera->setInheritanceMask(inheritanceMask);
 444     mBackGroundCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 445     mBackGroundCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 446     mBackGroundCamera->setRenderOrder(osg::Camera::NESTED_RENDER);
 447
 448     stateSet = mBackGroundCamera->getOrCreateStateSet();
 449     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 450
 451     osg::Group* sceneGroup = new osg::Group;
 452     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 453     sceneGroup->addChild(thesky->getCloudRoot());
 454
 455     stateSet = sceneGroup->getOrCreateStateSet();
 456     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 457     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 458
 459     // need to update the light on every frame
 460     osg::LightSource* lightSource = new osg::LightSource;
 461     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 462     // relative because of CameraView being just a clever transform node
 463     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 464     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 465     mRoot->addChild(lightSource);
 466
 467     lightSource->addChild(mBackGroundCamera.get());
 468     lightSource->addChild(sceneGroup);
 469
 470
 471     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 472     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 473     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 474     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 475     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 476
 477     // enable disable specular highlights.
 478     // is the place where we might plug in an other fragment shader ...
 479     osg::LightModel* lightModel = new osg::LightModel;
 480     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 481     stateSet->setAttribute(lightModel);
 482
 483     // switch to enable wireframe
 484     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 485     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 486     stateSet->setAttributeAndModes(polygonMode);
 487
 488     // scene fog handling
 489     stateSet->setAttributeAndModes(mFog.get());
 490     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 491
 492     // plug in the GUI
 493     osg::Camera* guiCamera = new osg::Camera;
 494     guiCamera->setRenderOrder(osg::Camera::POST_RENDER);
 495     guiCamera->setClearMask(0);
 496     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 497     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 498     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 499     guiCamera->setInheritanceMask(inheritanceMask);
 500     guiCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 501     guiCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 502     mRoot->addChild(guiCamera);
 503     osg::Geode* geode = new osg::Geode;
 504     geode->addDrawable(new SGPuDrawable);
 505     geode->addDrawable(new SGHUDAndPanelDrawable);
 506     guiCamera->addChild(geode);
 507
 508     // this one contains all lights, here we set the light states we did
 509     // in the plib case with plain OpenGL
 510     osg::Group* lightGroup = new osg::Group;
 511     sceneGroup->addChild(lightGroup);
 512     lightGroup->addChild(globals->get_scenery()->get_gnd_lights_root());
 513     lightGroup->addChild(globals->get_scenery()->get_vasi_lights_root());
 514     lightGroup->addChild(globals->get_scenery()->get_rwy_lights_root());
 515     lightGroup->addChild(globals->get_scenery()->get_taxi_lights_root());
 516
 517     stateSet = globals->get_scenery()->get_gnd_lights_root()->getOrCreateStateSet();
 518     stateSet->setAttributeAndModes(mFog.get());
 519     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 520     stateSet = globals->get_scenery()->get_vasi_lights_root()->getOrCreateStateSet();
 521     stateSet->setAttributeAndModes(mRunwayLightingFog.get());
 522     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 523     stateSet = globals->get_scenery()->get_rwy_lights_root()->getOrCreateStateSet();
 524     stateSet->setAttributeAndModes(mRunwayLightingFog.get());
 525     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 526     stateSet = globals->get_scenery()->get_taxi_lights_root()->getOrCreateStateSet();
 527     stateSet->setAttributeAndModes(mTaxiLightingFog.get());
 528     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 529
 530     mCameraView->addChild(mRoot.get());
 531     sceneView->setSceneData(mCameraView.get());
 532
 533 //  sceneView->getState()->setCheckForGLErrors(osg::State::ONCE_PER_ATTRIBUTE);
 534 }
 535
 536
 537 // Update all Visuals (redraws anything graphics related)
 538 void
 539 FGRenderer::update( bool refresh_camera_settings ) {
 540     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 541                           || fgGetBool("sim/sceneryloaded-override");
 542
 543     if ( idle_state < 1000 || !scenery_loaded ) {
 544         if (sceneView.valid() && sceneView->getState()) {
 545             sceneView->getState()->setActiveTextureUnit(0);
 546             sceneView->getState()->setClientActiveTextureUnit(0);
 547             sceneView->getState()->disableAllVertexArrays();
 548         }
 549         // still initializing, draw the splash screen
 550         glPushAttrib(GL_ALL_ATTRIB_BITS);
 551         glPushClientAttrib(~0u);
 552
 553         fgSplashUpdate(1.0);
 554
 555         glPopClientAttrib();
 556         glPopAttrib();
 557
 558         // Keep resetting sim time while the sim is initializing
 559         globals->set_sim_time_sec( 0.0 );
 560         return;
 561     }
 562
 563     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 564     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 565     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 566     bool distance_attenuation
 567         = fgGetBool("/sim/rendering/distance-attenuation");
 568     // OSGFIXME
 569     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 570                                   distance_attenuation );
 571
 572     static const SGPropertyNode *groundlevel_nearplane
 573         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 574
 575     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 576
 577     // update fog params
 578     double actual_visibility;
 579     if (fgGetBool("/environment/clouds/status")) {
 580         actual_visibility = thesky->get_visibility();
 581     } else {
 582         actual_visibility = fgGetDouble("/environment/visibility-m");
 583     }
 584
 585     static double last_visibility = -9999;
 586     if ( actual_visibility != last_visibility ) {
 587         last_visibility = actual_visibility;
 588
 589         fog_exp_density = m_log01 / actual_visibility;
 590         fog_exp2_density = sqrt_m_log01 / actual_visibility;
 591         ground_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 592         if ( actual_visibility < 8000 ) {
 593             rwy_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 2.5);
 594             taxi_exp2_punch_through = sqrt_m_log01 / (actual_visibility * 1.5);
 595         } else {
 596             rwy_exp2_punch_through = sqrt_m_log01 / ( 8000 * 2.5 );
 597             taxi_exp2_punch_through = sqrt_m_log01 / ( 8000 * 1.5 );
 598         }
 599         mFog->setDensity(fog_exp2_density);
 600         mRunwayLightingFog->setDensity(rwy_exp2_punch_through);
 601         mTaxiLightingFog->setDensity(taxi_exp2_punch_through);
 602         mGroundLightingFog->setDensity(ground_exp2_punch_through);
 603     }
 604
 605     // idle_state is now 1000 meaning we've finished all our
 606     // initializations and are running the main loop, so this will
 607     // now work without seg faulting the system.
 608
 609     FGViewer *current__view = globals->get_current_view();
 610     // Force update of center dependent values ...
 611     current__view->set_dirty();
 612
 613     if ( refresh_camera_settings ) {
 614         // update view port
 615         resize( fgGetInt("/sim/startup/xsize"),
 616                 fgGetInt("/sim/startup/ysize") );
 617
 618         SGVec3d center = globals->get_scenery()->get_center();
 619         SGVec3d position = current__view->getViewPosition();
 620         SGQuatd attitude = current__view->getViewOrientation();
 621         SGVec3d osgPosition = attitude.transform(center - position);
 622         mCameraView->setPosition(osgPosition.osg());
 623         mCameraView->setAttitude(inverse(attitude).osg());
 624     }
 625
 626     if ( skyblend ) {
 627         if ( fgGetBool("/sim/rendering/textures") ) {
 628             SGVec4f clearColor(l->adj_fog_color());
 629             sceneView->getCamera()->setClearColor(clearColor.osg());
 630         }
 631     } else {
 632         SGVec4f clearColor(l->sky_color());
 633         sceneView->getCamera()->setClearColor(clearColor.osg());
 634     }
 635
 636     // update fog params if visibility has changed
 637     double visibility_meters = fgGetDouble("/environment/visibility-m");
 638     thesky->set_visibility(visibility_meters);
 639
 640     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 641                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 642                         / (double)fgGetInt("/sim/model-hz") );
 643
 644     // update the sky dome
 645     if ( skyblend ) {
 646
 647         // The sun and moon distances are scaled down versions
 648         // of the actual distance to get both the moon and the sun
 649         // within the range of the far clip plane.
 650         // Moon distance:    384,467 kilometers
 651         // Sun distance: 150,000,000 kilometers
 652
 653         double sun_horiz_eff, moon_horiz_eff;
 654         if (fgGetBool("/sim/rendering/horizon-effect")) {
 655            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 656            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 657         } else {
 658            sun_horiz_eff = moon_horiz_eff = 1.0;
 659         }
 660
 661         static SGSkyState sstate;
 662
 663         sstate.view_pos  = current__view->get_view_pos();
 664         sstate.zero_elev = current__view->get_zero_elev();
 665         sstate.view_up   = current__view->get_world_up();
 666         sstate.lon       = current__view->getLongitude_deg()
 667                             * SGD_DEGREES_TO_RADIANS;
 668         sstate.lat       = current__view->getLatitude_deg()
 669                             * SGD_DEGREES_TO_RADIANS;
 670         sstate.alt       = current__view->getAltitudeASL_ft()
 671                             * SG_FEET_TO_METER;
 672         sstate.spin      = l->get_sun_rotation();
 673         sstate.gst       = globals->get_time_params()->getGst();
 674         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 675         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 676         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 677         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 678         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 679         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 680         sstate.sun_angle = l->get_sun_angle();
 681
 682
 683         /*
 684          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 685          << l->sky_color()[0] << " "
 686          << l->sky_color()[1] << " "
 687          << l->sky_color()[2] << " "
 688          << l->sky_color()[3] );
 689         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 690          << l->fog_color()[0] << " "
 691          << l->fog_color()[1] << " "
 692          << l->fog_color()[2] << " "
 693          << l->fog_color()[3] );
 694         SG_LOG( SG_GENERAL, SG_BULK,
 695                 "    sun_angle = " << l->sun_angle
 696          << "    moon_angle = " << l->moon_angle );
 697         */
 698
 699         static SGSkyColor scolor;
 700
 701         scolor.sky_color   = SGVec3f(l->sky_color().data());
 702         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 703         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 704         scolor.sun_angle   = l->get_sun_angle();
 705         scolor.moon_angle  = l->get_moon_angle();
 706         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 707         scolor.nstars      = globals->get_ephem()->getNumStars();
 708         scolor.planet_data = globals->get_ephem()->getPlanets();
 709         scolor.star_data   = globals->get_ephem()->getStars();
 710
 711         thesky->reposition( sstate, delta_time_sec );
 712         thesky->repaint( scolor );
 713
 714         /*
 715         SG_LOG( SG_GENERAL, SG_BULK,
 716                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 717          << view_pos[1] << " " << view_pos[2] );
 718         SG_LOG( SG_GENERAL, SG_BULK,
 719                 "    zero_elev = " << zero_elev[0] << " "
 720          << zero_elev[1] << " " << zero_elev[2]
 721          << " lon = " << cur_fdm_state->get_Longitude()
 722          << " lat = " << cur_fdm_state->get_Latitude() );
 723         SG_LOG( SG_GENERAL, SG_BULK,
 724                 "    sun_rot = " << l->get_sun_rotation
 725          << " gst = " << SGTime::cur_time_params->getGst() );
 726         SG_LOG( SG_GENERAL, SG_BULK,
 727              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 728           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 729           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 730           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 731         */
 732
 733         //OSGFIXME
 734 //         shadows->setupShadows(
 735 //           current__view->getLongitude_deg(),
 736 //           current__view->getLatitude_deg(),
 737 //           globals->get_time_params()->getGst(),
 738 //           globals->get_ephem()->getSunRightAscension(),
 739 //           globals->get_ephem()->getSunDeclination(),
 740 //           l->get_sun_angle());
 741
 742     }
 743
 744     if ( strcmp(fgGetString("/sim/rendering/fog"), "disabled") ) {
 745         SGVec4f color(l->adj_fog_color());
 746         mFog->setColor(color.osg());
 747         mRunwayLightingFog->setColor(color.osg());
 748         mTaxiLightingFog->setColor(color.osg());
 749         mGroundLightingFog->setColor(color.osg());
 750     }
 751
 752
 753 //     sgEnviro.setLight(l->adj_fog_color());
 754
 755     // texture parameters
 756     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
 757
 758     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 759       - current__view->getSGLocation()->get_cur_elev_m();
 760
 761     float scene_nearplane, scene_farplane;
 762     if ( agl > 10.0 ) {
 763         scene_nearplane = 10.0f;
 764         scene_farplane = 120000.0f;
 765     } else {
 766         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 767         scene_farplane = 120000.0f;
 768     }
 769     setNearFar( scene_nearplane, scene_farplane );
 770
 771 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 772 //         current__view->get_world_up(),
 773 //         current__view->getLongitude_deg(),
 774 //         current__view->getLatitude_deg(),
 775 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 776 //         delta_time_sec);
 777
 778     // OSGFIXME
 779 //     sgEnviro.drawLightning();
 780
 781 //        double current_view_origin_airspeed_horiz_kt =
 782 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 783 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 784 //                                * SGD_DEGREES_TO_RADIANS);
 785        // TODO:find the real view speed, not the AC one
 786 //     sgEnviro.drawPrecipitation(
 787 //         fgGetDouble("/environment/metar/rain-norm", 0.0),
 788 //         fgGetDouble("/environment/metar/snow-norm", 0.0),
 789 //         fgGetDouble("/environment/metar/hail-norm", 0.0),
 790 //         current__view->getPitch_deg() + current__view->getPitchOffset_deg(),
 791 //         current__view->getRoll_deg() + current__view->getRollOffset_deg(),
 792 //         - current__view->getHeadingOffset_deg(),
 793 //                current_view_origin_airspeed_horiz_kt
 794 //                );
 795
 796     // OSGFIXME
 797 //     if( is_internal )
 798 //         shadows->endOfFrame();
 799
 800     // need to call the update visitor once
 801     globals->get_aircraft_model()->select( true );
 802     FGTileMgr::set_tile_filter( true );
 803     mFrameStamp->setReferenceTime(globals->get_sim_time_sec());
 804     mFrameStamp->setFrameNumber(1+mFrameStamp->getFrameNumber());
 805     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 806     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 807                                 current__view->getViewOrientation());
 808     mUpdateVisitor->setSceneryCenter(globals->get_scenery()->get_center());
 809     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 810     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 811                              l->scene_diffuse(), l->scene_specular());
 812     mUpdateVisitor->setVisibility(actual_visibility);
 813
 814     if (fgGetBool("/sim/panel-hotspots"))
 815       sceneView->setCullMask(sceneView->getCullMask()|SG_NODEMASK_PICK_BIT);
 816     else
 817       sceneView->setCullMask(sceneView->getCullMask()&(~SG_NODEMASK_PICK_BIT));
 818
 819     sceneView->update();
 820     sceneView->cull();
 821     sceneView->draw();
 822 }
 823
 824
 825
 826 // options.cxx needs to see this for toggle_panel()
 827 // Handle new window size or exposure
 828 void
 829 FGRenderer::resize( int width, int height ) {
 830     int view_h;
 831
 832     if ( (!fgGetBool("/sim/virtual-cockpit"))
 833          && fgPanelVisible() && idle_state == 1000 ) {
 834         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 835                              globals->get_current_panel()->getYOffset()) / 768.0);
 836     } else {
 837         view_h = height;
 838     }
 839
 840     sceneView->getViewport()->setViewport(0, height - view_h, width, view_h);
 841
 842     static int lastwidth = 0;
 843     static int lastheight = 0;
 844     if (width != lastwidth)
 845         fgSetInt("/sim/startup/xsize", lastwidth = width);
 846     if (height != lastheight)
 847         fgSetInt("/sim/startup/ysize", lastheight = height);
 848
 849     guiInitMouse(width, height);
 850
 851     // for all views
 852     FGViewMgr *viewmgr = globals->get_viewmgr();
 853     if (viewmgr) {
 854       for ( int i = 0; i < viewmgr->size(); ++i ) {
 855         viewmgr->get_view(i)->
 856           set_aspect_ratio((float)view_h / (float)width);
 857       }
 858
 859       setFOV( viewmgr->get_current_view()->get_h_fov(),
 860               viewmgr->get_current_view()->get_v_fov() );
 861     }
 862 }
 863
 864
 865 // These are wrapper functions around ssgSetNearFar() and ssgSetFOV()
 866 // which will post process and rewrite the resulting frustum if we
 867 // want to do asymmetric view frustums.
 868
 869 static void fgHackFrustum() {
 870
 871     // specify a percent of the configured view frustum to actually
 872     // display.  This is a bit of a hack to achieve asymmetric view
 873     // frustums.  For instance, if you want to display two monitors
 874     // side by side, you could specify each with a double fov, a 0.5
 875     // aspect ratio multiplier, and then the left side monitor would
 876     // have a left_pct = 0.0, a right_pct = 0.5, a bottom_pct = 0.0,
 877     // and a top_pct = 1.0.  The right side monitor would have a
 878     // left_pct = 0.5 and a right_pct = 1.0.
 879
 880     static SGPropertyNode *left_pct
 881         = fgGetNode("/sim/current-view/frustum-left-pct");
 882     static SGPropertyNode *right_pct
 883         = fgGetNode("/sim/current-view/frustum-right-pct");
 884     static SGPropertyNode *bottom_pct
 885         = fgGetNode("/sim/current-view/frustum-bottom-pct");
 886     static SGPropertyNode *top_pct
 887         = fgGetNode("/sim/current-view/frustum-top-pct");
 888
 889     double left, right;
 890     double bottom, top;
 891     double zNear, zFar;
 892     sceneView->getProjectionMatrixAsFrustum(left, right, bottom, top, zNear, zFar);
 893     // cout << " l = " << f->getLeft()
 894     //      << " r = " << f->getRight()
 895     //      << " b = " << f->getBot()
 896     //      << " t = " << f->getTop()
 897     //      << " n = " << f->getNear()
 898     //      << " f = " << f->getFar()
 899     //      << endl;
 900
 901     double width = right - left;
 902     double height = top - bottom;
 903
 904     double l, r, t, b;
 905
 906     if ( left_pct != NULL ) {
 907         l = left + width * left_pct->getDoubleValue();
 908     } else {
 909         l = left;
 910     }
 911
 912     if ( right_pct != NULL ) {
 913         r = left + width * right_pct->getDoubleValue();
 914     } else {
 915         r = right;
 916     }
 917
 918     if ( bottom_pct != NULL ) {
 919         b = bottom + height * bottom_pct->getDoubleValue();
 920     } else {
 921         b = bottom;
 922     }
 923
 924     if ( top_pct != NULL ) {
 925         t = bottom + height * top_pct->getDoubleValue();
 926     } else {
 927         t = top;
 928     }
 929
 930     sceneView->setProjectionMatrixAsFrustum(l, r, b, t, zNear, zFar);
 931 }
 932
 933
 934 // we need some static storage space for these values.  However, we
 935 // can't store it in a renderer class object because the functions
 936 // that manipulate these are static.  They are static so they can
 937 // interface to the display callback system.  There's probably a
 938 // better way, there has to be a better way, but I'm not seeing it
 939 // right now.
 940 static float fov_width = 55.0;
 941 static float fov_height = 42.0;
 942 static float fov_near = 1.0;
 943 static float fov_far = 1000.0;
 944
 945
 946 /** FlightGear code should use this routine to set the FOV rather than
 947  *  calling the ssg routine directly
 948  */
 949 void FGRenderer::setFOV( float w, float h ) {
 950     fov_width = w;
 951     fov_height = h;
 952
 953     sceneView->setProjectionMatrixAsPerspective(fov_height,
 954                                                 fov_width/fov_height,
 955                                                 fov_near, fov_far);
 956     // fully specify the view frustum before hacking it (so we don't
 957     // accumulate hacked effects
 958     fgHackFrustum();
 959 //     sgEnviro.setFOV( w, h );
 960 }
 961
 962
 963 /** FlightGear code should use this routine to set the Near/Far clip
 964  *  planes rather than calling the ssg routine directly
 965  */
 966 void FGRenderer::setNearFar( float n, float f ) {
 967 // OSGFIXME: we have currently too much z-buffer fights
 968 n = 0.1;
 969     fov_near = n;
 970     fov_far = f;
 971
 972     sceneView->setProjectionMatrixAsPerspective(fov_height,
 973                                                 fov_width/fov_height,
 974                                                 fov_near, fov_far);
 975
 976     // fully specify the view frustum before hacking it (so we don't
 977     // accumulate hacked effects
 978     fgHackFrustum();
 979 }
 980
 981 bool
 982 FGRenderer::pick( unsigned x, unsigned y,
 983                   std::vector<SGSceneryPick>& pickList )
 984 {
 985   // wipe out the return ...
 986   pickList.resize(0);
 987
 988   // we can get called early ...
 989   if (!sceneView.valid())
 990     return false;
 991
 992   osg::Node* sceneData = globals->get_scenery()->get_scene_graph();
 993   if (!sceneData)
 994     return false;
 995   osg::Viewport* viewport = sceneView->getViewport();
 996   if (!viewport)
 997     return false;
 998
 999   // good old scenery center
1000   SGVec3d center = globals->get_scenery()->get_center();
1001
1002   // don't know why, but the update has partly happened somehow,
1003   // so update the scenery part of the viewer
1004   FGViewer *current_view = globals->get_current_view();
1005   // Force update of center dependent values ...
1006   current_view->set_dirty();
1007   SGVec3d position = current_view->getViewPosition();
1008   SGQuatd attitude = current_view->getViewOrientation();
1009   SGVec3d osgPosition = attitude.transform(center - position);
1010   mCameraView->setPosition(osgPosition.osg());
1011   mCameraView->setAttitude(inverse(attitude).osg());
1012
1013   osg::Matrix projection(sceneView->getProjectionMatrix());
1014   osg::Matrix modelview(sceneView->getViewMatrix());
1015
1016   osg::NodePathList nodePath = sceneData->getParentalNodePaths();
1017   // modify the view matrix so that it accounts for this nodePath's
1018   // accumulated transform
1019   if (!nodePath.empty())
1020     modelview.preMult(computeLocalToWorld(nodePath.front()));
1021
1022   // swap the y values ...
1023   y = viewport->height() - y;
1024   // set up the pick visitor
1025   osgUtil::PickVisitor pickVisitor(viewport, projection, modelview, x, y);
1026   sceneData->accept(pickVisitor);
1027   if (!pickVisitor.hits())
1028     return false;
1029
1030   // collect all interaction callbacks on the pick ray.
1031   // They get stored in the pickCallbacks list where they are sorted back
1032   // to front and croasest to finest wrt the scenery node they are attached to
1033   osgUtil::PickVisitor::LineSegmentHitListMap::const_iterator mi;
1034   for (mi = pickVisitor.getSegHitList().begin();
1035        mi != pickVisitor.getSegHitList().end();
1036        ++mi) {
1037     osgUtil::IntersectVisitor::HitList::const_iterator hi;
1038     for (hi = mi->second.begin(); hi != mi->second.end(); ++hi) {
1039       // ok, go back the nodes and ask for intersection callbacks,
1040       // execute them in top down order
1041       const osg::NodePath& np = hi->getNodePath();
1042       osg::NodePath::const_reverse_iterator npi;
1043       for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1044         SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1045         if (!ud)
1046           continue;
1047         for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1048           SGPickCallback* pickCallback = ud->getPickCallback(i);
1049           if (!pickCallback)
1050             continue;
1051           SGSceneryPick sceneryPick;
1052           /// note that this is done totally in doubles instead of
1053           /// just using getWorldIntersectionPoint
1054           osg::Vec3d localPt = hi->getLocalIntersectPoint();
1055           sceneryPick.info.local = SGVec3d(localPt);
1056           if (hi->getMatrix())
1057             sceneryPick.info.wgs84 = SGVec3d(localPt*(*hi->getMatrix()));
1058           else
1059             sceneryPick.info.wgs84 = SGVec3d(localPt);
1060           sceneryPick.info.wgs84 += globals->get_scenery()->get_center();
1061           sceneryPick.callback = pickCallback;
1062           pickList.push_back(sceneryPick);
1063         }
1064       }
1065     }
1066   }
1067
1068   return !pickList.empty();
1069 }
1070
1071 // end of renderer.cxx
1072