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/Version>
  53 #include <osg/TexEnv>
  54
  55 #include <osgUtil/SceneView>
  56 #include <osgUtil/UpdateVisitor>
  57 #include <osgUtil/IntersectVisitor>
  58 #include <osgUtil/LineSegmentIntersector>
  59
  60 #include <osg/io_utils>
  61 #include <osgDB/WriteFile>
  62 #include <osgDB/ReadFile>
  63 #include <sstream>
  64
  65 #include <simgear/math/SGMath.hxx>
  66 #include <simgear/screen/extensions.hxx>
  67 #include <simgear/scene/material/matlib.hxx>
  68 #include <simgear/scene/model/animation.hxx>
  69 #include <simgear/scene/model/model.hxx>
  70 #include <simgear/scene/model/modellib.hxx>
  71 #include <simgear/scene/model/placement.hxx>
  72 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  73 #include <simgear/scene/tgdb/pt_lights.hxx>
  74 #include <simgear/props/props.hxx>
  75 #include <simgear/timing/sg_time.hxx>
  76 #include <simgear/ephemeris/ephemeris.hxx>
  77 #include <simgear/math/sg_random.h>
  78 #ifdef FG_JPEG_SERVER
  79 #include <simgear/screen/jpgfactory.hxx>
  80 #endif
  81
  82 #include <simgear/environment/visual_enviro.hxx>
  83
  84 #include <Scenery/tileentry.hxx>
  85 #include <Time/light.hxx>
  86 #include <Time/light.hxx>
  87 #include <Aircraft/aircraft.hxx>
  88 #include <Cockpit/panel.hxx>
  89 #include <Cockpit/cockpit.hxx>
  90 #include <Cockpit/hud.hxx>
  91 #include <Model/panelnode.hxx>
  92 #include <Model/modelmgr.hxx>
  93 #include <Model/acmodel.hxx>
  94 #include <Scenery/scenery.hxx>
  95 #include <Scenery/redout.hxx>
  96 #include <Scenery/tilemgr.hxx>
  97 #include <GUI/new_gui.hxx>
  98 #include <Instrumentation/instrument_mgr.hxx>
  99 #include <Instrumentation/HUD/HUD.hxx>
 100
 101 #include <Include/general.hxx>
 102 #include "splash.hxx"
 103 #include "renderer.hxx"
 104 #include "main.hxx"
 105
 106 // XXX Make this go away when OSG 2.2 is released.
 107 #if (FG_OSG_VERSION >= 21004)
 108 #define UPDATE_VISITOR_IN_VIEWER 1
 109 #endif
 110
 111 class SGPuDrawable : public osg::Drawable {
 112 public:
 113   SGPuDrawable()
 114   {
 115     // Dynamic stuff, do not store geometry
 116     setUseDisplayList(false);
 117
 118     osg::StateSet* stateSet = getOrCreateStateSet();
 119     stateSet->setRenderBinDetails(1001, "RenderBin");
 120     // speed optimization?
 121     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 122     // We can do translucent menus, so why not. :-)
 123     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 124     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 125     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 126
 127     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 128
 129     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 130     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 131   }
 132   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 133   { drawImplementation(*renderInfo.getState()); }
 134   void drawImplementation(osg::State& state) const
 135   {
 136     if (!fgOSIsMainContext(state.getGraphicsContext()))
 137       return;
 138
 139     state.pushStateSet(getStateSet());
 140     state.apply();
 141     state.setActiveTextureUnit(0);
 142     state.setClientActiveTextureUnit(0);
 143     state.disableAllVertexArrays();
 144
 145     glPushAttrib(GL_ALL_ATTRIB_BITS);
 146     glPushClientAttrib(~0u);
 147
 148     puDisplay();
 149
 150     glPopClientAttrib();
 151     glPopAttrib();
 152
 153     state.popStateSet();
 154     state.dirtyAllModes();
 155     state.dirtyAllAttributes();
 156     state.dirtyAllVertexArrays();
 157   }
 158
 159   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 160   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 161
 162 private:
 163 };
 164
 165 class SGHUDAndPanelDrawable : public osg::Drawable {
 166 public:
 167   SGHUDAndPanelDrawable()
 168   {
 169     // Dynamic stuff, do not store geometry
 170     setUseDisplayList(false);
 171
 172     osg::StateSet* stateSet = getOrCreateStateSet();
 173     stateSet->setRenderBinDetails(1000, "RenderBin");
 174
 175     // speed optimization?
 176     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 177     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 178     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 179     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 180     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 181
 182     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 183   }
 184   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 185   { drawImplementation(*renderInfo.getState()); }
 186   void drawImplementation(osg::State& state) const
 187   {
 188 //     std::cout << state.getGraphicsContext() << std::endl;
 189     if (!fgOSIsMainContext(state.getGraphicsContext()))
 190       return;
 191
 192     state.pushStateSet(getStateSet());
 193     state.apply();
 194     state.setActiveTextureUnit(0);
 195     state.setClientActiveTextureUnit(0);
 196     state.disableAllVertexArrays();
 197
 198     glPushAttrib(GL_ALL_ATTRIB_BITS);
 199     glPushClientAttrib(~0u);
 200
 201     fgCockpitUpdate(&state);
 202
 203     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 204     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 205     hud->draw(state);
 206
 207     // update the panel subsystem
 208     if ( globals->get_current_panel() != NULL )
 209         globals->get_current_panel()->update(state);
 210     // We don't need a state here - can be safely removed when we can pick
 211     // correctly
 212     fgUpdate3DPanels();
 213
 214     glPopClientAttrib();
 215     glPopAttrib();
 216
 217     state.popStateSet();
 218     state.dirtyAllModes();
 219     state.dirtyAllAttributes();
 220     state.dirtyAllVertexArrays();
 221   }
 222
 223   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 224   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 225
 226 private:
 227 };
 228
 229 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 230 public:
 231   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 232   {
 233     assert(dynamic_cast<osg::LightSource*>(node));
 234     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 235     osg::Light* light = lightSource->getLight();
 236
 237     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 238     light->setAmbient(l->scene_ambient().osg());
 239     light->setDiffuse(l->scene_diffuse().osg());
 240     light->setSpecular(l->scene_specular().osg());
 241     SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 242     light->setPosition(position.osg());
 243     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 244     light->setDirection(direction.osg());
 245     light->setSpotExponent(0);
 246     light->setSpotCutoff(180);
 247     light->setConstantAttenuation(1);
 248     light->setLinearAttenuation(0);
 249     light->setQuadraticAttenuation(0);
 250
 251     traverse(node, nv);
 252   }
 253 };
 254
 255 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 256 public:
 257   FGWireFrameModeUpdateCallback() :
 258     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 259   { }
 260   virtual void operator()(osg::StateAttribute* stateAttribute,
 261                           osg::NodeVisitor*)
 262   {
 263     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 264     osg::PolygonMode* polygonMode;
 265     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 266
 267     if (mWireframe->getBoolValue())
 268       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 269                            osg::PolygonMode::LINE);
 270     else
 271       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 272                            osg::PolygonMode::FILL);
 273   }
 274 private:
 275   SGSharedPtr<SGPropertyNode> mWireframe;
 276 };
 277
 278 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 279 public:
 280   FGLightModelUpdateCallback() :
 281     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 282   { }
 283   virtual void operator()(osg::StateAttribute* stateAttribute,
 284                           osg::NodeVisitor*)
 285   {
 286     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 287     osg::LightModel* lightModel;
 288     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 289
 290 #if 0
 291     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 292     lightModel->setAmbientIntensity(l->scene_ambient().osg());
 293 #else
 294     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 295 #endif
 296     lightModel->setTwoSided(true);
 297     lightModel->setLocalViewer(false);
 298
 299     if (mHighlights->getBoolValue()) {
 300       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 301     } else {
 302       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 303     }
 304   }
 305 private:
 306   SGSharedPtr<SGPropertyNode> mHighlights;
 307 };
 308
 309 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 310 public:
 311   FGFogEnableUpdateCallback() :
 312     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 313   { }
 314   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 315   {
 316     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 317       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 318     } else {
 319       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 320     }
 321   }
 322 private:
 323   SGSharedPtr<SGPropertyNode> mFogEnabled;
 324 };
 325
 326 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 327 public:
 328   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 329   {
 330     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 331     assert(dynamic_cast<osg::Fog*>(sa));
 332     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 333     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 334     fog->setMode(osg::Fog::EXP2);
 335     fog->setColor(updateVisitor->getFogColor().osg());
 336     fog->setDensity(updateVisitor->getFogExp2Density());
 337   }
 338 };
 339
 340 // update callback for the switch node guarding that splash
 341 class FGScenerySwitchCallback : public osg::NodeCallback {
 342 public:
 343   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 344   {
 345     assert(dynamic_cast<osg::Switch*>(node));
 346     osg::Switch* sw = static_cast<osg::Switch*>(node);
 347
 348     double t = globals->get_sim_time_sec();
 349     bool enabled = 0 < t;
 350     sw->setValue(0, enabled);
 351     if (!enabled)
 352       return;
 353     traverse(node, nv);
 354   }
 355 };
 356
 357 // Sky structures
 358 SGSky *thesky;
 359
 360 osg::ref_ptr<osgUtil::SceneView> sceneView = new osgUtil::SceneView;  // This SceneView is used by class FGJpegHttpd ( jpg-httpd.cxx )
 361 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 362 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 363
 364 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 365
 366 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 367
 368 static osg::ref_ptr<osg::CameraView> mCameraView = new osg::CameraView;
 369 static osg::ref_ptr<osg::Camera> mBackGroundCamera = new osg::Camera;
 370
 371 FGRenderer::FGRenderer()
 372 {
 373 #ifdef FG_JPEG_SERVER
 374    jpgRenderFrame = FGRenderer::update;
 375 #endif
 376    manipulator = new FGManipulator;
 377 }
 378
 379 FGRenderer::~FGRenderer()
 380 {
 381 #ifdef FG_JPEG_SERVER
 382    jpgRenderFrame = NULL;
 383 #endif
 384 }
 385
 386 // Initialize various GL/view parameters
 387 // XXX This should be called "preinit" or something, as it initializes
 388 // critical parts of the scene graph in addition to the splash screen.
 389 void
 390 FGRenderer::splashinit( void ) {
 391     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 392     if (viewer) {
 393         sceneView = 0;
 394         mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 395         mRealRoot->addChild(fgCreateSplashNode());
 396         mFrameStamp = viewer->getFrameStamp();
 397         // Scene doesn't seem to pass the frame stamp to the update
 398         // visitor automatically.
 399         mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 400 #ifdef UPDATE_VISITOR_IN_VIEWER
 401         viewer->setUpdateVisitor(mUpdateVisitor.get());
 402 #else
 403         osgViewer::Scene* scene = viewer->getScene();
 404         scene->setUpdateVisitor(mUpdateVisitor.get());
 405 #endif
 406     } else {
 407         // Add the splash screen node
 408         mRealRoot->addChild(fgCreateSplashNode());
 409         sceneView->setSceneData(mRealRoot.get());
 410         sceneView->setDefaults(osgUtil::SceneView::COMPILE_GLOBJECTS_AT_INIT);
 411         sceneView->setFrameStamp(mFrameStamp.get());
 412         sceneView->setUpdateVisitor(mUpdateVisitor.get());
 413     }
 414 }
 415
 416 void
 417 FGRenderer::init( void ) {
 418     // The viewer can call this before the graphics context is current
 419     // in the main thread; indeed, in a multithreaded setup it might
 420     // never be current in the main thread.
 421     fgMakeCurrent();
 422     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 423     osg::initNotifyLevel();
 424
 425     // The number of polygon-offset "units" to place between layers.  In
 426     // principle, one is supposed to be enough.  In practice, I find that
 427     // my hardware/driver requires many more.
 428     osg::PolygonOffset::setUnitsMultiplier(1);
 429     osg::PolygonOffset::setFactorMultiplier(1);
 430
 431     // Go full screen if requested ...
 432     if ( fgGetBool("/sim/startup/fullscreen") )
 433         fgOSFullScreen();
 434
 435     if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
 436          (!fgGetBool("/sim/rendering/shading"))) {
 437         // if fastest fog requested, or if flat shading force fastest
 438         glHint ( GL_FOG_HINT, GL_FASTEST );
 439     } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
 440         glHint ( GL_FOG_HINT, GL_DONT_CARE );
 441     }
 442
 443     glHint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 444     glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 445     glHint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 446
 447     if (viewer) {
 448       viewer->getCamera()
 449             ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 450     } else {
 451         sceneView->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 452         sceneView->getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 453     }
 454
 455
 456     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 457
 458     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 459
 460     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 461     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 462
 463     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 464     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 465     stateSet->setAttribute(new osg::BlendFunc);
 466     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 467
 468     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 469
 470     // this will be set below
 471     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 472
 473     osg::Material* material = new osg::Material;
 474     stateSet->setAttribute(material);
 475
 476     stateSet->setTextureAttribute(0, new osg::TexEnv);
 477     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 478
 479
 480 //     stateSet->setAttribute(new osg::CullFace(osg::CullFace::BACK));
 481 //     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
 482
 483     // this is the topmost scenegraph node for osg
 484     mBackGroundCamera->addChild(thesky->getPreRoot());
 485     mBackGroundCamera->setClearMask(0);
 486
 487     GLbitfield inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 488     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 489     inheritanceMask &= ~osg::CullSettings::NEAR_FAR_RATIO;
 490     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 491     mBackGroundCamera->setInheritanceMask(inheritanceMask);
 492     mBackGroundCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 493     mBackGroundCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 494     mBackGroundCamera->setRenderOrder(osg::Camera::NESTED_RENDER);
 495
 496     stateSet = mBackGroundCamera->getOrCreateStateSet();
 497     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 498
 499     osg::Group* sceneGroup = new osg::Group;
 500     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 501     sceneGroup->addChild(thesky->getCloudRoot());
 502
 503     stateSet = sceneGroup->getOrCreateStateSet();
 504     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 505     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 506
 507     // need to update the light on every frame
 508     osg::LightSource* lightSource = new osg::LightSource;
 509     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 510     // relative because of CameraView being just a clever transform node
 511     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 512     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 513     mRoot->addChild(lightSource);
 514
 515     lightSource->addChild(mBackGroundCamera.get());
 516     lightSource->addChild(sceneGroup);
 517
 518
 519     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 520     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 521     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 522     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 523     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 524
 525     // enable disable specular highlights.
 526     // is the place where we might plug in an other fragment shader ...
 527     osg::LightModel* lightModel = new osg::LightModel;
 528     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 529     stateSet->setAttribute(lightModel);
 530
 531     // switch to enable wireframe
 532     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 533     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 534     stateSet->setAttributeAndModes(polygonMode);
 535
 536     // scene fog handling
 537     osg::Fog* fog = new osg::Fog;
 538     fog->setUpdateCallback(new FGFogUpdateCallback);
 539     stateSet->setAttributeAndModes(fog);
 540     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 541
 542     // plug in the GUI
 543     osg::Camera* guiCamera = new osg::Camera;
 544     guiCamera->setRenderOrder(osg::Camera::POST_RENDER, 100);
 545     guiCamera->setClearMask(0);
 546     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 547     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 548     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 549     guiCamera->setInheritanceMask(inheritanceMask);
 550     guiCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 551     guiCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 552     osg::Geode* geode = new osg::Geode;
 553     geode->addDrawable(new SGPuDrawable);
 554     geode->addDrawable(new SGHUDAndPanelDrawable);
 555     guiCamera->addChild(geode);
 556
 557     mCameraView->addChild(mRoot.get());
 558
 559     osg::Switch* sw = new osg::Switch;
 560     sw->setUpdateCallback(new FGScenerySwitchCallback);
 561     sw->addChild(mCameraView.get());
 562
 563     mRealRoot->addChild(sw);
 564     mRealRoot->addChild(FGCreateRedoutNode());
 565     mRealRoot->addChild(guiCamera);
 566 //  sceneView->getState()->setCheckForGLErrors(osg::State::ONCE_PER_ATTRIBUTE);
 567 }
 568
 569
 570 // Update all Visuals (redraws anything graphics related)
 571 void
 572 FGRenderer::update( bool refresh_camera_settings ) {
 573     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 574                           || fgGetBool("sim/sceneryloaded-override");
 575     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 576     if ( idle_state < 1000 || !scenery_loaded ) {
 577         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 578
 579         // Keep resetting sim time while the sim is initializing
 580         globals->set_sim_time_sec( 0.0 );
 581
 582         // the splash screen is now in the scenegraph
 583         if (!viewer) {
 584             sceneView->update();
 585             sceneView->cull();
 586             sceneView->draw();
 587         }
 588         return;
 589     }
 590
 591     // Fade out the splash screen over the first three seconds.
 592     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 593     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 594
 595     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 596     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 597     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 598     bool distance_attenuation
 599         = fgGetBool("/sim/rendering/distance-attenuation");
 600     // OSGFIXME
 601     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 602                                   distance_attenuation );
 603
 604     static const SGPropertyNode *groundlevel_nearplane
 605         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 606
 607     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 608
 609     // update fog params
 610     double actual_visibility;
 611     if (fgGetBool("/environment/clouds/status")) {
 612         actual_visibility = thesky->get_visibility();
 613     } else {
 614         actual_visibility = fgGetDouble("/environment/visibility-m");
 615     }
 616
 617     // idle_state is now 1000 meaning we've finished all our
 618     // initializations and are running the main loop, so this will
 619     // now work without seg faulting the system.
 620
 621     FGViewer *current__view = globals->get_current_view();
 622     // Force update of center dependent values ...
 623     current__view->set_dirty();
 624
 625     if ( refresh_camera_settings ) {
 626         // update view port
 627         resize( fgGetInt("/sim/startup/xsize"),
 628                 fgGetInt("/sim/startup/ysize") );
 629
 630         SGVec3d position = current__view->getViewPosition();
 631         SGQuatd attitude = current__view->getViewOrientation();
 632         SGVec3d osgPosition = attitude.transform(-position);
 633         if (viewer) {
 634             FGManipulator *manipulator
 635                 = globals->get_renderer()->getManipulator();
 636             manipulator->setPosition(position.osg());
 637             manipulator->setAttitude(attitude.osg());
 638         } else {
 639             mCameraView->setPosition(osgPosition.osg());
 640             mCameraView->setAttitude(inverse(attitude).osg());
 641         }
 642     }
 643     osg::Camera *camera;
 644     if (viewer)
 645         camera = viewer->getCamera();
 646     else
 647         camera = sceneView->getCamera();
 648     if ( skyblend ) {
 649
 650         if ( fgGetBool("/sim/rendering/textures") ) {
 651             SGVec4f clearColor(l->adj_fog_color());
 652             camera->setClearColor(clearColor.osg());
 653         }
 654     } else {
 655         SGVec4f clearColor(l->sky_color());
 656         camera->setClearColor(clearColor.osg());
 657     }
 658
 659     // update fog params if visibility has changed
 660     double visibility_meters = fgGetDouble("/environment/visibility-m");
 661     thesky->set_visibility(visibility_meters);
 662
 663     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 664                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 665                         / (double)fgGetInt("/sim/model-hz") );
 666
 667     // update the sky dome
 668     if ( skyblend ) {
 669
 670         // The sun and moon distances are scaled down versions
 671         // of the actual distance to get both the moon and the sun
 672         // within the range of the far clip plane.
 673         // Moon distance:    384,467 kilometers
 674         // Sun distance: 150,000,000 kilometers
 675
 676         double sun_horiz_eff, moon_horiz_eff;
 677         if (fgGetBool("/sim/rendering/horizon-effect")) {
 678            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 679            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 680         } else {
 681            sun_horiz_eff = moon_horiz_eff = 1.0;
 682         }
 683
 684         static SGSkyState sstate;
 685
 686         sstate.view_pos  = toVec3f(current__view->get_view_pos());
 687         sstate.zero_elev = toVec3f(current__view->get_zero_elev());
 688         sstate.view_up   = current__view->get_world_up();
 689         sstate.lon       = current__view->getLongitude_deg()
 690                             * SGD_DEGREES_TO_RADIANS;
 691         sstate.lat       = current__view->getLatitude_deg()
 692                             * SGD_DEGREES_TO_RADIANS;
 693         sstate.alt       = current__view->getAltitudeASL_ft()
 694                             * SG_FEET_TO_METER;
 695         sstate.spin      = l->get_sun_rotation();
 696         sstate.gst       = globals->get_time_params()->getGst();
 697         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 698         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 699         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 700         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 701         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 702         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 703         sstate.sun_angle = l->get_sun_angle();
 704
 705
 706         /*
 707          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 708          << l->sky_color()[0] << " "
 709          << l->sky_color()[1] << " "
 710          << l->sky_color()[2] << " "
 711          << l->sky_color()[3] );
 712         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 713          << l->fog_color()[0] << " "
 714          << l->fog_color()[1] << " "
 715          << l->fog_color()[2] << " "
 716          << l->fog_color()[3] );
 717         SG_LOG( SG_GENERAL, SG_BULK,
 718                 "    sun_angle = " << l->sun_angle
 719          << "    moon_angle = " << l->moon_angle );
 720         */
 721
 722         static SGSkyColor scolor;
 723
 724         scolor.sky_color   = SGVec3f(l->sky_color().data());
 725         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 726         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 727         scolor.sun_angle   = l->get_sun_angle();
 728         scolor.moon_angle  = l->get_moon_angle();
 729         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 730         scolor.nstars      = globals->get_ephem()->getNumStars();
 731         scolor.planet_data = globals->get_ephem()->getPlanets();
 732         scolor.star_data   = globals->get_ephem()->getStars();
 733
 734         thesky->reposition( sstate, delta_time_sec );
 735         thesky->repaint( scolor );
 736
 737         /*
 738         SG_LOG( SG_GENERAL, SG_BULK,
 739                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 740          << view_pos[1] << " " << view_pos[2] );
 741         SG_LOG( SG_GENERAL, SG_BULK,
 742                 "    zero_elev = " << zero_elev[0] << " "
 743          << zero_elev[1] << " " << zero_elev[2]
 744          << " lon = " << cur_fdm_state->get_Longitude()
 745          << " lat = " << cur_fdm_state->get_Latitude() );
 746         SG_LOG( SG_GENERAL, SG_BULK,
 747                 "    sun_rot = " << l->get_sun_rotation
 748          << " gst = " << SGTime::cur_time_params->getGst() );
 749         SG_LOG( SG_GENERAL, SG_BULK,
 750              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 751           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 752           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 753           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 754         */
 755
 756         //OSGFIXME
 757 //         shadows->setupShadows(
 758 //           current__view->getLongitude_deg(),
 759 //           current__view->getLatitude_deg(),
 760 //           globals->get_time_params()->getGst(),
 761 //           globals->get_ephem()->getSunRightAscension(),
 762 //           globals->get_ephem()->getSunDeclination(),
 763 //           l->get_sun_angle());
 764
 765     }
 766
 767 //     sgEnviro.setLight(l->adj_fog_color());
 768
 769     // texture parameters
 770     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
 771
 772     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 773       - current__view->getSGLocation()->get_cur_elev_m();
 774
 775     float scene_nearplane, scene_farplane;
 776     if ( agl > 10.0 ) {
 777         scene_nearplane = 10.0f;
 778         scene_farplane = 120000.0f;
 779     } else {
 780         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 781         scene_farplane = 120000.0f;
 782     }
 783     setNearFar( scene_nearplane, scene_farplane );
 784
 785 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 786 //         current__view->get_world_up(),
 787 //         current__view->getLongitude_deg(),
 788 //         current__view->getLatitude_deg(),
 789 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 790 //         delta_time_sec);
 791
 792     // OSGFIXME
 793 //     sgEnviro.drawLightning();
 794
 795 //        double current_view_origin_airspeed_horiz_kt =
 796 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 797 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 798 //                                * SGD_DEGREES_TO_RADIANS);
 799        // TODO:find the real view speed, not the AC one
 800 //     sgEnviro.drawPrecipitation(
 801 //         fgGetDouble("/environment/metar/rain-norm", 0.0),
 802 //         fgGetDouble("/environment/metar/snow-norm", 0.0),
 803 //         fgGetDouble("/environment/metar/hail-norm", 0.0),
 804 //         current__view->getPitch_deg() + current__view->getPitchOffset_deg(),
 805 //         current__view->getRoll_deg() + current__view->getRollOffset_deg(),
 806 //         - current__view->getHeadingOffset_deg(),
 807 //                current_view_origin_airspeed_horiz_kt
 808 //                );
 809
 810     // OSGFIXME
 811 //     if( is_internal )
 812 //         shadows->endOfFrame();
 813
 814     // need to call the update visitor once
 815     if (!viewer) {
 816         mFrameStamp->setReferenceTime(globals->get_sim_time_sec());
 817         mFrameStamp->setSimulationTime(globals->get_sim_time_sec());
 818         mFrameStamp->setFrameNumber(1+mFrameStamp->getFrameNumber());
 819     }
 820     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 821     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 822                                 current__view->getViewOrientation());
 823     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 824     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 825                              l->scene_diffuse(), l->scene_specular(),
 826                              l->adj_fog_color(),
 827                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 828     mUpdateVisitor->setVisibility(actual_visibility);
 829     bool hotspots = fgGetBool("/sim/panel-hotspots");
 830     if (viewer) {
 831         if (hotspots)
 832             camera->setCullMask(camera->getCullMask()|SG_NODEMASK_PICK_BIT);
 833         else
 834             camera->setCullMask(camera->getCullMask()
 835                                 & ~SG_NODEMASK_PICK_BIT);
 836     } else {
 837         if (hotspots)
 838             sceneView->setCullMask(sceneView->getCullMask()
 839                                    |SG_NODEMASK_PICK_BIT);
 840         else
 841             sceneView->setCullMask(sceneView->getCullMask()
 842                                    &(~SG_NODEMASK_PICK_BIT));
 843         sceneView->update();
 844         sceneView->cull();
 845         sceneView->draw();
 846     }
 847 }
 848
 849
 850
 851 // options.cxx needs to see this for toggle_panel()
 852 // Handle new window size or exposure
 853 void
 854 FGRenderer::resize( int width, int height ) {
 855     int view_h;
 856
 857     if ( (!fgGetBool("/sim/virtual-cockpit"))
 858          && fgPanelVisible() && idle_state == 1000 ) {
 859         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 860                              globals->get_current_panel()->getYOffset()) / 768.0);
 861     } else {
 862         view_h = height;
 863     }
 864     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 865     if (viewer)
 866         ;
 867   //       viewer->getCamera()->getViewport()->setViewport(0, height - view_h,
 868 //                                                         width, view_h);
 869     else
 870         sceneView->getViewport()->setViewport(0, height - view_h,
 871                                               width, view_h);
 872
 873     static int lastwidth = 0;
 874     static int lastheight = 0;
 875     if (width != lastwidth)
 876         fgSetInt("/sim/startup/xsize", lastwidth = width);
 877     if (height != lastheight)
 878         fgSetInt("/sim/startup/ysize", lastheight = height);
 879
 880     guiInitMouse(width, height);
 881
 882     // for all views
 883     FGViewMgr *viewmgr = globals->get_viewmgr();
 884     if (viewmgr) {
 885       for ( int i = 0; i < viewmgr->size(); ++i ) {
 886         viewmgr->get_view(i)->
 887           set_aspect_ratio((float)view_h / (float)width);
 888       }
 889
 890       setFOV( viewmgr->get_current_view()->get_h_fov(),
 891               viewmgr->get_current_view()->get_v_fov() );
 892     }
 893 }
 894
 895
 896 // we need some static storage space for these values.  However, we
 897 // can't store it in a renderer class object because the functions
 898 // that manipulate these are static.  They are static so they can
 899 // interface to the display callback system.  There's probably a
 900 // better way, there has to be a better way, but I'm not seeing it
 901 // right now.
 902 static float fov_width = 55.0;
 903 static float fov_height = 42.0;
 904 static float fov_near = 1.0;
 905 static float fov_far = 1000.0;
 906
 907
 908 /** FlightGear code should use this routine to set the FOV rather than
 909  *  calling the ssg routine directly
 910  */
 911 void FGRenderer::setFOV( float w, float h ) {
 912     fov_width = w;
 913     fov_height = h;
 914     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 915     if (viewer)
 916         viewer->getCamera()->setProjectionMatrixAsPerspective(fov_height, 4.0/3.0, fov_near, fov_far);
 917     else
 918         sceneView->setProjectionMatrixAsPerspective(fov_height,
 919                                                     fov_width/fov_height,
 920                                                     fov_near, fov_far);
 921 }
 922
 923
 924 /** FlightGear code should use this routine to set the Near/Far clip
 925  *  planes rather than calling the ssg routine directly
 926  */
 927 void FGRenderer::setNearFar( float n, float f ) {
 928 // OSGFIXME: we have currently too much z-buffer fights
 929 n = 0.1;
 930     fov_near = n;
 931     fov_far = f;
 932     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 933     if (viewer)
 934         viewer->getCamera()->setProjectionMatrixAsPerspective(fov_height, 4.0/3.0, fov_near, fov_far);
 935     else
 936         sceneView->setProjectionMatrixAsPerspective(fov_height,
 937                                                     fov_width/fov_height,
 938                                                     fov_near, fov_far);
 939
 940 }
 941
 942 bool
 943 FGRenderer::pick( unsigned x, unsigned y,
 944                   std::vector<SGSceneryPick>& pickList,
 945                   const osgGA::GUIEventAdapter* ea )
 946 {
 947   osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 948   // wipe out the return ...
 949   pickList.resize(0);
 950
 951   if (sceneView.valid()) {
 952     osg::Node* sceneData = globals->get_scenery()->get_scene_graph();
 953     if (!sceneData)
 954       return false;
 955
 956     osg::Viewport* viewport = sceneView->getViewport();
 957     if (!viewport)
 958       return false;
 959     // don't know why, but the update has partly happened somehow,
 960     // so update the scenery part of the viewer
 961     FGViewer *current_view = globals->get_current_view();
 962     // Force update of center dependent values ...
 963     current_view->set_dirty();
 964     SGVec3d position = current_view->getViewPosition();
 965     SGQuatd attitude = current_view->getViewOrientation();
 966     SGVec3d osgPosition = attitude.transform(-position);
 967     mCameraView->setPosition(osgPosition.osg());
 968     mCameraView->setAttitude(inverse(attitude).osg());
 969
 970     osg::Matrix projection(sceneView->getProjectionMatrix());
 971     osg::Matrix modelview(sceneView->getViewMatrix());
 972
 973     osg::NodePathList nodePath = sceneData->getParentalNodePaths();
 974     // modify the view matrix so that it accounts for this nodePath's
 975     // accumulated transform
 976     if (!nodePath.empty())
 977       modelview.preMult(computeLocalToWorld(nodePath.front()));
 978
 979     // swap the y values ...
 980     y = viewport->height() - y;
 981     // set up the pick visitor
 982     osgUtil::PickVisitor pickVisitor(viewport, projection, modelview, x, y);
 983     sceneData->accept(pickVisitor);
 984     if (!pickVisitor.hits())
 985       return false;
 986
 987     // collect all interaction callbacks on the pick ray.
 988     // They get stored in the pickCallbacks list where they are sorted back
 989     // to front and croasest to finest wrt the scenery node they are attached to
 990     osgUtil::PickVisitor::LineSegmentHitListMap::const_iterator mi;
 991     for (mi = pickVisitor.getSegHitList().begin();
 992          mi != pickVisitor.getSegHitList().end();
 993          ++mi) {
 994       osgUtil::IntersectVisitor::HitList::const_iterator hi;
 995       for (hi = mi->second.begin(); hi != mi->second.end(); ++hi) {
 996         // ok, go back the nodes and ask for intersection callbacks,
 997         // execute them in top down order
 998         const osg::NodePath& np = hi->getNodePath();
 999         osg::NodePath::const_reverse_iterator npi;
1000         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1001           SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1002           if (!ud)
1003             continue;
1004           for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1005             SGPickCallback* pickCallback = ud->getPickCallback(i);
1006             if (!pickCallback)
1007               continue;
1008             SGSceneryPick sceneryPick;
1009             /// note that this is done totally in doubles instead of
1010             /// just using getWorldIntersectionPoint
1011             osg::Vec3d localPt = hi->getLocalIntersectPoint();
1012             sceneryPick.info.local = SGVec3d(localPt);
1013             if (hi->getMatrix())
1014               sceneryPick.info.wgs84 = SGVec3d(localPt*(*hi->getMatrix()));
1015             else
1016               sceneryPick.info.wgs84 = SGVec3d(localPt);
1017             sceneryPick.callback = pickCallback;
1018             pickList.push_back(sceneryPick);
1019           }
1020         }
1021       }
1022     }
1023
1024     return !pickList.empty();
1025
1026   } else if (viewer) {
1027
1028     // just compute intersections in the viewers method ...
1029     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
1030     Intersections intersections;
1031     viewer->computeIntersections(ea->getX(), ea->getY(), intersections);
1032
1033     Intersections::iterator hit;
1034     for (hit = intersections.begin(); hit != intersections.end(); ++hit) {
1035       const osg::NodePath& np = hit->nodePath;
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           sceneryPick.info.local = SGVec3d(hit->getLocalIntersectPoint());
1047           sceneryPick.info.wgs84 = SGVec3d(hit->getWorldIntersectPoint());
1048           sceneryPick.callback = pickCallback;
1049           pickList.push_back(sceneryPick);
1050         }
1051       }
1052     }
1053
1054     return !pickList.empty();
1055   } else {                      // we can get called early ...
1056     return false;
1057   }
1058 }
1059
1060 void
1061 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
1062 {
1063     mRealRoot->addChild(camera);
1064 }
1065
1066 bool
1067 fgDumpSceneGraphToFile(const char* filename)
1068 {
1069     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
1070 }
1071
1072 bool
1073 fgDumpTerrainBranchToFile(const char* filename)
1074 {
1075     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
1076                                  filename );
1077 }
1078
1079 // end of renderer.cxx
1080