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