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 #include <osgUtil/LineSegmentIntersector>
  58
  59 #include <osg/io_utils>
  60 #include <osgDB/WriteFile>
  61 #include <osgDB/ReadFile>
  62 #include <sstream>
  63
  64 #include <simgear/math/SGMath.hxx>
  65 #include <simgear/screen/extensions.hxx>
  66 #include <simgear/scene/material/matlib.hxx>
  67 #include <simgear/scene/model/animation.hxx>
  68 #include <simgear/scene/model/model.hxx>
  69 #include <simgear/scene/model/modellib.hxx>
  70 #include <simgear/scene/model/placement.hxx>
  71 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  72 #include <simgear/scene/tgdb/pt_lights.hxx>
  73 #include <simgear/props/props.hxx>
  74 #include <simgear/timing/sg_time.hxx>
  75 #include <simgear/ephemeris/ephemeris.hxx>
  76 #include <simgear/math/sg_random.h>
  77 #ifdef FG_JPEG_SERVER
  78 #include <simgear/screen/jpgfactory.hxx>
  79 #endif
  80
  81 #include <simgear/environment/visual_enviro.hxx>
  82
  83 #include <Scenery/tileentry.hxx>
  84 #include <Time/light.hxx>
  85 #include <Time/light.hxx>
  86 #include <Aircraft/aircraft.hxx>
  87 #include <Cockpit/panel.hxx>
  88 #include <Cockpit/cockpit.hxx>
  89 #include <Cockpit/hud.hxx>
  90 #include <Model/panelnode.hxx>
  91 #include <Model/modelmgr.hxx>
  92 #include <Model/acmodel.hxx>
  93 #include <Scenery/scenery.hxx>
  94 #include <Scenery/redout.hxx>
  95 #include <Scenery/tilemgr.hxx>
  96 #include <GUI/new_gui.hxx>
  97 #include <Instrumentation/instrument_mgr.hxx>
  98 #include <Instrumentation/HUD/HUD.hxx>
  99
 100 #include "splash.hxx"
 101 #include "renderer.hxx"
 102 #include "main.hxx"
 103
 104 // XXX Make this go away when OSG 2.2 is released.
 105 #if ((2 >= OSG_VERSION_MAJOR) && (1 >= OSG_VERSION_MINOR) \
 106      && (4 >= OSG_VERSION_PATCH))
 107 #define UPDATE_VISITOR_IN_VIEWER 1
 108 #endif
 109
 110 class SGPuDrawable : public osg::Drawable {
 111 public:
 112   SGPuDrawable()
 113   {
 114     // Dynamic stuff, do not store geometry
 115     setUseDisplayList(false);
 116
 117     osg::StateSet* stateSet = getOrCreateStateSet();
 118     stateSet->setRenderBinDetails(1001, "RenderBin");
 119     // speed optimization?
 120     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 121     // We can do translucent menus, so why not. :-)
 122     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 123     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 124     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 125
 126     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 127
 128     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 129     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 130   }
 131   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 132   { drawImplementation(*renderInfo.getState()); }
 133   void drawImplementation(osg::State& state) const
 134   {
 135     if (!fgOSIsMainContext(state.getGraphicsContext()))
 136       return;
 137
 138     state.pushStateSet(getStateSet());
 139     state.apply();
 140     state.setActiveTextureUnit(0);
 141     state.setClientActiveTextureUnit(0);
 142     state.disableAllVertexArrays();
 143
 144     glPushAttrib(GL_ALL_ATTRIB_BITS);
 145     glPushClientAttrib(~0u);
 146
 147     puDisplay();
 148
 149     glPopClientAttrib();
 150     glPopAttrib();
 151
 152     state.popStateSet();
 153     state.dirtyAllModes();
 154     state.dirtyAllAttributes();
 155     state.dirtyAllVertexArrays();
 156   }
 157
 158   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 159   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 160
 161 private:
 162 };
 163
 164 class SGHUDAndPanelDrawable : public osg::Drawable {
 165 public:
 166   SGHUDAndPanelDrawable()
 167   {
 168     // Dynamic stuff, do not store geometry
 169     setUseDisplayList(false);
 170
 171     osg::StateSet* stateSet = getOrCreateStateSet();
 172     stateSet->setRenderBinDetails(1000, "RenderBin");
 173
 174     // speed optimization?
 175     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 176     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 177     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 178     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 179     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 180
 181     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 182   }
 183   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 184   { drawImplementation(*renderInfo.getState()); }
 185   void drawImplementation(osg::State& state) const
 186   {
 187 //     std::cout << state.getGraphicsContext() << std::endl;
 188     if (!fgOSIsMainContext(state.getGraphicsContext()))
 189       return;
 190
 191     state.pushStateSet(getStateSet());
 192     state.apply();
 193     state.setActiveTextureUnit(0);
 194     state.setClientActiveTextureUnit(0);
 195     state.disableAllVertexArrays();
 196
 197     glPushAttrib(GL_ALL_ATTRIB_BITS);
 198     glPushClientAttrib(~0u);
 199
 200     fgCockpitUpdate(&state);
 201
 202     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 203     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 204     hud->draw(state);
 205
 206     // update the panel subsystem
 207     if ( globals->get_current_panel() != NULL )
 208         globals->get_current_panel()->update(state);
 209     // We don't need a state here - can be safely removed when we can pick
 210     // correctly
 211     fgUpdate3DPanels();
 212
 213     glPopClientAttrib();
 214     glPopAttrib();
 215
 216     state.popStateSet();
 217     state.dirtyAllModes();
 218     state.dirtyAllAttributes();
 219     state.dirtyAllVertexArrays();
 220   }
 221
 222   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 223   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 224
 225 private:
 226 };
 227
 228 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 229 public:
 230   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 231   {
 232     assert(dynamic_cast<osg::LightSource*>(node));
 233     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 234     osg::Light* light = lightSource->getLight();
 235
 236     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 237     light->setAmbient(l->scene_ambient().osg());
 238     light->setDiffuse(l->scene_diffuse().osg());
 239     light->setSpecular(l->scene_specular().osg());
 240     SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 241     light->setPosition(position.osg());
 242     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 243     light->setDirection(direction.osg());
 244     light->setSpotExponent(0);
 245     light->setSpotCutoff(180);
 246     light->setConstantAttenuation(1);
 247     light->setLinearAttenuation(0);
 248     light->setQuadraticAttenuation(0);
 249
 250     traverse(node, nv);
 251   }
 252 };
 253
 254 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 255 public:
 256   FGWireFrameModeUpdateCallback() :
 257     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 258   { }
 259   virtual void operator()(osg::StateAttribute* stateAttribute,
 260                           osg::NodeVisitor*)
 261   {
 262     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 263     osg::PolygonMode* polygonMode;
 264     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 265
 266     if (mWireframe->getBoolValue())
 267       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 268                            osg::PolygonMode::LINE);
 269     else
 270       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 271                            osg::PolygonMode::FILL);
 272   }
 273 private:
 274   SGSharedPtr<SGPropertyNode> mWireframe;
 275 };
 276
 277 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 278 public:
 279   FGLightModelUpdateCallback() :
 280     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 281   { }
 282   virtual void operator()(osg::StateAttribute* stateAttribute,
 283                           osg::NodeVisitor*)
 284   {
 285     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 286     osg::LightModel* lightModel;
 287     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 288
 289 #if 0
 290     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 291     lightModel->setAmbientIntensity(l->scene_ambient().osg());
 292 #else
 293     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 294 #endif
 295     lightModel->setTwoSided(true);
 296     lightModel->setLocalViewer(false);
 297
 298     if (mHighlights->getBoolValue()) {
 299       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 300     } else {
 301       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 302     }
 303   }
 304 private:
 305   SGSharedPtr<SGPropertyNode> mHighlights;
 306 };
 307
 308 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 309 public:
 310   FGFogEnableUpdateCallback() :
 311     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 312   { }
 313   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 314   {
 315     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 316       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 317     } else {
 318       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 319     }
 320   }
 321 private:
 322   SGSharedPtr<SGPropertyNode> mFogEnabled;
 323 };
 324
 325 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 326 public:
 327   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 328   {
 329     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 330     assert(dynamic_cast<osg::Fog*>(sa));
 331     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 332     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 333     fog->setMode(osg::Fog::EXP2);
 334     fog->setColor(updateVisitor->getFogColor().osg());
 335     fog->setDensity(updateVisitor->getFogExp2Density());
 336   }
 337 };
 338
 339 // update callback for the switch node guarding that splash
 340 class FGScenerySwitchCallback : public osg::NodeCallback {
 341 public:
 342   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 343   {
 344     assert(dynamic_cast<osg::Switch*>(node));
 345     osg::Switch* sw = static_cast<osg::Switch*>(node);
 346
 347     double t = globals->get_sim_time_sec();
 348     bool enabled = 0 < t;
 349     sw->setValue(0, enabled);
 350     if (!enabled)
 351       return;
 352     traverse(node, nv);
 353   }
 354 };
 355
 356 // Sky structures
 357 SGSky *thesky;
 358
 359 osg::ref_ptr<osgUtil::SceneView> sceneView = new osgUtil::SceneView;  // This SceneView is used by class FGJpegHttpd ( jpg-httpd.cxx )
 360 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 361 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 362
 363 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 364
 365 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 366
 367 static osg::ref_ptr<osg::CameraView> mCameraView = new osg::CameraView;
 368 static osg::ref_ptr<osg::Camera> mBackGroundCamera = new osg::Camera;
 369
 370 FGRenderer::FGRenderer()
 371 {
 372 #ifdef FG_JPEG_SERVER
 373    jpgRenderFrame = FGRenderer::update;
 374 #endif
 375 #ifdef ENABLE_OSGVIEWER
 376    manipulator = new FGManipulator;
 377 #endif
 378 }
 379
 380 FGRenderer::~FGRenderer()
 381 {
 382 #ifdef FG_JPEG_SERVER
 383    jpgRenderFrame = NULL;
 384 #endif
 385 }
 386
 387 // Initialize various GL/view parameters
 388 // XXX This should be called "preinit" or something, as it initializes
 389 // critical parts of the scene graph in addition to the splash screen.
 390 void
 391 FGRenderer::splashinit( void ) {
 392     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 393     if (viewer) {
 394         sceneView = 0;
 395         mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 396         mRealRoot->addChild(fgCreateSplashNode());
 397         mFrameStamp = viewer->getFrameStamp();
 398         // Scene doesn't seem to pass the frame stamp to the update
 399         // visitor automatically.
 400         mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 401 #ifdef UPDATE_VISITOR_IN_VIEWER
 402         viewer->setUpdateVisitor(mUpdateVisitor.get());
 403 #else
 404         osgViewer::Scene* scene = viewer->getScene();
 405         scene->setUpdateVisitor(mUpdateVisitor.get());
 406 #endif
 407     } else {
 408         // Add the splash screen node
 409         mRealRoot->addChild(fgCreateSplashNode());
 410         sceneView->setSceneData(mRealRoot.get());
 411         sceneView->setDefaults(osgUtil::SceneView::COMPILE_GLOBJECTS_AT_INIT);
 412         sceneView->setFrameStamp(mFrameStamp.get());
 413         sceneView->setUpdateVisitor(mUpdateVisitor.get());
 414     }
 415 }
 416
 417 void
 418 FGRenderer::init( void ) {
 419     // The viewer can call this before the graphics context is current
 420     // in the main thread; indeed, in a multithreaded setup it might
 421     // never be current in the main thread.
 422     fgMakeCurrent();
 423     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 424     osg::initNotifyLevel();
 425
 426     // The number of polygon-offset "units" to place between layers.  In
 427     // principle, one is supposed to be enough.  In practice, I find that
 428     // my hardware/driver requires many more.
 429     osg::PolygonOffset::setUnitsMultiplier(1);
 430     osg::PolygonOffset::setFactorMultiplier(1);
 431
 432     // Go full screen if requested ...
 433     if ( fgGetBool("/sim/startup/fullscreen") )
 434         fgOSFullScreen();
 435
 436     if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
 437          (!fgGetBool("/sim/rendering/shading"))) {
 438         // if fastest fog requested, or if flat shading force fastest
 439         glHint ( GL_FOG_HINT, GL_FASTEST );
 440     } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
 441         glHint ( GL_FOG_HINT, GL_DONT_CARE );
 442     }
 443
 444     glHint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 445     glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 446     glHint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 447
 448     if (viewer) {
 449       viewer->getCamera()
 450             ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 451     } else {
 452         sceneView->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 453         sceneView->getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 454     }
 455
 456
 457     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 458
 459     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 460
 461     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 462     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 463
 464     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 465     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 466     stateSet->setAttribute(new osg::BlendFunc);
 467     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 468
 469     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 470
 471     // this will be set below
 472     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 473
 474     osg::Material* material = new osg::Material;
 475     stateSet->setAttribute(material);
 476
 477     stateSet->setTextureAttribute(0, new osg::TexEnv);
 478     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 479
 480
 481 //     stateSet->setAttribute(new osg::CullFace(osg::CullFace::BACK));
 482 //     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
 483
 484     // this is the topmost scenegraph node for osg
 485     mBackGroundCamera->addChild(thesky->getPreRoot());
 486     mBackGroundCamera->setClearMask(0);
 487
 488     GLbitfield inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 489     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 490     inheritanceMask &= ~osg::CullSettings::NEAR_FAR_RATIO;
 491     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 492     mBackGroundCamera->setInheritanceMask(inheritanceMask);
 493     mBackGroundCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 494     mBackGroundCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 495     mBackGroundCamera->setRenderOrder(osg::Camera::NESTED_RENDER);
 496
 497     stateSet = mBackGroundCamera->getOrCreateStateSet();
 498     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 499
 500     osg::Group* sceneGroup = new osg::Group;
 501     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 502     sceneGroup->addChild(thesky->getCloudRoot());
 503
 504     stateSet = sceneGroup->getOrCreateStateSet();
 505     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 506     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 507
 508     // need to update the light on every frame
 509     osg::LightSource* lightSource = new osg::LightSource;
 510     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 511     // relative because of CameraView being just a clever transform node
 512     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 513     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 514     mRoot->addChild(lightSource);
 515
 516     lightSource->addChild(mBackGroundCamera.get());
 517     lightSource->addChild(sceneGroup);
 518
 519
 520     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 521     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 522     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 523     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 524     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 525
 526     // enable disable specular highlights.
 527     // is the place where we might plug in an other fragment shader ...
 528     osg::LightModel* lightModel = new osg::LightModel;
 529     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 530     stateSet->setAttribute(lightModel);
 531
 532     // switch to enable wireframe
 533     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 534     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 535     stateSet->setAttributeAndModes(polygonMode);
 536
 537     // scene fog handling
 538     osg::Fog* fog = new osg::Fog;
 539     fog->setUpdateCallback(new FGFogUpdateCallback);
 540     stateSet->setAttributeAndModes(fog);
 541     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 542
 543     // plug in the GUI
 544     osg::Camera* guiCamera = new osg::Camera;
 545     guiCamera->setRenderOrder(osg::Camera::POST_RENDER, 100);
 546     guiCamera->setClearMask(0);
 547     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 548     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 549     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 550     guiCamera->setInheritanceMask(inheritanceMask);
 551     guiCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 552     guiCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 553     osg::Geode* geode = new osg::Geode;
 554     geode->addDrawable(new SGPuDrawable);
 555     geode->addDrawable(new SGHUDAndPanelDrawable);
 556     guiCamera->addChild(geode);
 557
 558     mCameraView->addChild(mRoot.get());
 559
 560     osg::Switch* sw = new osg::Switch;
 561     sw->setUpdateCallback(new FGScenerySwitchCallback);
 562     sw->addChild(mCameraView.get());
 563
 564     mRealRoot->addChild(sw);
 565     mRealRoot->addChild(FGCreateRedoutNode());
 566     mRealRoot->addChild(guiCamera);
 567 //  sceneView->getState()->setCheckForGLErrors(osg::State::ONCE_PER_ATTRIBUTE);
 568 }
 569
 570
 571 // Update all Visuals (redraws anything graphics related)
 572 void
 573 FGRenderer::update( bool refresh_camera_settings ) {
 574     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 575                           || fgGetBool("sim/sceneryloaded-override");
 576     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 577     if ( idle_state < 1000 || !scenery_loaded ) {
 578         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 579
 580         // Keep resetting sim time while the sim is initializing
 581         globals->set_sim_time_sec( 0.0 );
 582
 583         // the splash screen is now in the scenegraph
 584         if (!viewer) {
 585             sceneView->update();
 586             sceneView->cull();
 587             sceneView->draw();
 588         }
 589         return;
 590     }
 591
 592     // Fade out the splash screen over the first three seconds.
 593     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 594     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 595
 596     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 597     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 598     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 599     bool distance_attenuation
 600         = fgGetBool("/sim/rendering/distance-attenuation");
 601     // OSGFIXME
 602     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 603                                   distance_attenuation );
 604
 605     static const SGPropertyNode *groundlevel_nearplane
 606         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 607
 608     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 609
 610     // update fog params
 611     double actual_visibility;
 612     if (fgGetBool("/environment/clouds/status")) {
 613         actual_visibility = thesky->get_visibility();
 614     } else {
 615         actual_visibility = fgGetDouble("/environment/visibility-m");
 616     }
 617
 618     // idle_state is now 1000 meaning we've finished all our
 619     // initializations and are running the main loop, so this will
 620     // now work without seg faulting the system.
 621
 622     FGViewer *current__view = globals->get_current_view();
 623     // Force update of center dependent values ...
 624     current__view->set_dirty();
 625
 626     if ( refresh_camera_settings ) {
 627         // update view port
 628         resize( fgGetInt("/sim/startup/xsize"),
 629                 fgGetInt("/sim/startup/ysize") );
 630
 631         SGVec3d position = current__view->getViewPosition();
 632         SGQuatd attitude = current__view->getViewOrientation();
 633         SGVec3d osgPosition = attitude.transform(-position);
 634         if (viewer) {
 635             FGManipulator *manipulator
 636                 = globals->get_renderer()->getManipulator();
 637             manipulator->setPosition(position.osg());
 638             manipulator->setAttitude(attitude.osg());
 639         } else {
 640             mCameraView->setPosition(osgPosition.osg());
 641             mCameraView->setAttitude(inverse(attitude).osg());
 642         }
 643     }
 644     osg::Camera *camera;
 645     if (viewer)
 646         camera = viewer->getCamera();
 647     else
 648         camera = sceneView->getCamera();
 649     if ( skyblend ) {
 650
 651         if ( fgGetBool("/sim/rendering/textures") ) {
 652             SGVec4f clearColor(l->adj_fog_color());
 653             camera->setClearColor(clearColor.osg());
 654         }
 655     } else {
 656         SGVec4f clearColor(l->sky_color());
 657         camera->setClearColor(clearColor.osg());
 658     }
 659
 660     // update fog params if visibility has changed
 661     double visibility_meters = fgGetDouble("/environment/visibility-m");
 662     thesky->set_visibility(visibility_meters);
 663
 664     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 665                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 666                         / (double)fgGetInt("/sim/model-hz") );
 667
 668     // update the sky dome
 669     if ( skyblend ) {
 670
 671         // The sun and moon distances are scaled down versions
 672         // of the actual distance to get both the moon and the sun
 673         // within the range of the far clip plane.
 674         // Moon distance:    384,467 kilometers
 675         // Sun distance: 150,000,000 kilometers
 676
 677         double sun_horiz_eff, moon_horiz_eff;
 678         if (fgGetBool("/sim/rendering/horizon-effect")) {
 679            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 680            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 681         } else {
 682            sun_horiz_eff = moon_horiz_eff = 1.0;
 683         }
 684
 685         static SGSkyState sstate;
 686
 687         sstate.view_pos  = toVec3f(current__view->get_view_pos());
 688         sstate.zero_elev = toVec3f(current__view->get_zero_elev());
 689         sstate.view_up   = current__view->get_world_up();
 690         sstate.lon       = current__view->getLongitude_deg()
 691                             * SGD_DEGREES_TO_RADIANS;
 692         sstate.lat       = current__view->getLatitude_deg()
 693                             * SGD_DEGREES_TO_RADIANS;
 694         sstate.alt       = current__view->getAltitudeASL_ft()
 695                             * SG_FEET_TO_METER;
 696         sstate.spin      = l->get_sun_rotation();
 697         sstate.gst       = globals->get_time_params()->getGst();
 698         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 699         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 700         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 701         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 702         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 703         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 704         sstate.sun_angle = l->get_sun_angle();
 705
 706
 707         /*
 708          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 709          << l->sky_color()[0] << " "
 710          << l->sky_color()[1] << " "
 711          << l->sky_color()[2] << " "
 712          << l->sky_color()[3] );
 713         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 714          << l->fog_color()[0] << " "
 715          << l->fog_color()[1] << " "
 716          << l->fog_color()[2] << " "
 717          << l->fog_color()[3] );
 718         SG_LOG( SG_GENERAL, SG_BULK,
 719                 "    sun_angle = " << l->sun_angle
 720          << "    moon_angle = " << l->moon_angle );
 721         */
 722
 723         static SGSkyColor scolor;
 724
 725         scolor.sky_color   = SGVec3f(l->sky_color().data());
 726         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 727         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 728         scolor.sun_angle   = l->get_sun_angle();
 729         scolor.moon_angle  = l->get_moon_angle();
 730         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 731         scolor.nstars      = globals->get_ephem()->getNumStars();
 732         scolor.planet_data = globals->get_ephem()->getPlanets();
 733         scolor.star_data   = globals->get_ephem()->getStars();
 734
 735         thesky->reposition( sstate, delta_time_sec );
 736         thesky->repaint( scolor );
 737
 738         /*
 739         SG_LOG( SG_GENERAL, SG_BULK,
 740                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 741          << view_pos[1] << " " << view_pos[2] );
 742         SG_LOG( SG_GENERAL, SG_BULK,
 743                 "    zero_elev = " << zero_elev[0] << " "
 744          << zero_elev[1] << " " << zero_elev[2]
 745          << " lon = " << cur_fdm_state->get_Longitude()
 746          << " lat = " << cur_fdm_state->get_Latitude() );
 747         SG_LOG( SG_GENERAL, SG_BULK,
 748                 "    sun_rot = " << l->get_sun_rotation
 749          << " gst = " << SGTime::cur_time_params->getGst() );
 750         SG_LOG( SG_GENERAL, SG_BULK,
 751              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 752           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 753           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 754           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 755         */
 756
 757         //OSGFIXME
 758 //         shadows->setupShadows(
 759 //           current__view->getLongitude_deg(),
 760 //           current__view->getLatitude_deg(),
 761 //           globals->get_time_params()->getGst(),
 762 //           globals->get_ephem()->getSunRightAscension(),
 763 //           globals->get_ephem()->getSunDeclination(),
 764 //           l->get_sun_angle());
 765
 766     }
 767
 768 //     sgEnviro.setLight(l->adj_fog_color());
 769
 770     // texture parameters
 771     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
 772
 773     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 774       - current__view->getSGLocation()->get_cur_elev_m();
 775
 776     float scene_nearplane, scene_farplane;
 777     if ( agl > 10.0 ) {
 778         scene_nearplane = 10.0f;
 779         scene_farplane = 120000.0f;
 780     } else {
 781         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 782         scene_farplane = 120000.0f;
 783     }
 784     setNearFar( scene_nearplane, scene_farplane );
 785
 786 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 787 //         current__view->get_world_up(),
 788 //         current__view->getLongitude_deg(),
 789 //         current__view->getLatitude_deg(),
 790 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 791 //         delta_time_sec);
 792
 793     // OSGFIXME
 794 //     sgEnviro.drawLightning();
 795
 796 //        double current_view_origin_airspeed_horiz_kt =
 797 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 798 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 799 //                                * SGD_DEGREES_TO_RADIANS);
 800        // TODO:find the real view speed, not the AC one
 801 //     sgEnviro.drawPrecipitation(
 802 //         fgGetDouble("/environment/metar/rain-norm", 0.0),
 803 //         fgGetDouble("/environment/metar/snow-norm", 0.0),
 804 //         fgGetDouble("/environment/metar/hail-norm", 0.0),
 805 //         current__view->getPitch_deg() + current__view->getPitchOffset_deg(),
 806 //         current__view->getRoll_deg() + current__view->getRollOffset_deg(),
 807 //         - current__view->getHeadingOffset_deg(),
 808 //                current_view_origin_airspeed_horiz_kt
 809 //                );
 810
 811     // OSGFIXME
 812 //     if( is_internal )
 813 //         shadows->endOfFrame();
 814
 815     // need to call the update visitor once
 816     if (!viewer) {
 817         mFrameStamp->setReferenceTime(globals->get_sim_time_sec());
 818         mFrameStamp->setSimulationTime(globals->get_sim_time_sec());
 819         mFrameStamp->setFrameNumber(1+mFrameStamp->getFrameNumber());
 820     }
 821     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 822     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 823                                 current__view->getViewOrientation());
 824     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 825     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 826                              l->scene_diffuse(), l->scene_specular(),
 827                              l->adj_fog_color(),
 828                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 829     mUpdateVisitor->setVisibility(actual_visibility);
 830     bool hotspots = fgGetBool("/sim/panel-hotspots");
 831     if (viewer) {
 832         if (hotspots)
 833             camera->setCullMask(camera->getCullMask()|SG_NODEMASK_PICK_BIT);
 834         else
 835             camera->setCullMask(camera->getCullMask()
 836                                 & ~SG_NODEMASK_PICK_BIT);
 837     } else {
 838         if (hotspots)
 839             sceneView->setCullMask(sceneView->getCullMask()
 840                                    |SG_NODEMASK_PICK_BIT);
 841         else
 842             sceneView->setCullMask(sceneView->getCullMask()
 843                                    &(~SG_NODEMASK_PICK_BIT));
 844         sceneView->update();
 845         sceneView->cull();
 846         sceneView->draw();
 847     }
 848 }
 849
 850
 851
 852 // options.cxx needs to see this for toggle_panel()
 853 // Handle new window size or exposure
 854 void
 855 FGRenderer::resize( int width, int height ) {
 856     int view_h;
 857
 858     if ( (!fgGetBool("/sim/virtual-cockpit"))
 859          && fgPanelVisible() && idle_state == 1000 ) {
 860         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 861                              globals->get_current_panel()->getYOffset()) / 768.0);
 862     } else {
 863         view_h = height;
 864     }
 865     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 866     if (viewer)
 867         ;
 868   //       viewer->getCamera()->getViewport()->setViewport(0, height - view_h,
 869 //                                                         width, view_h);
 870     else
 871         sceneView->getViewport()->setViewport(0, height - view_h,
 872                                               width, view_h);
 873
 874     static int lastwidth = 0;
 875     static int lastheight = 0;
 876     if (width != lastwidth)
 877         fgSetInt("/sim/startup/xsize", lastwidth = width);
 878     if (height != lastheight)
 879         fgSetInt("/sim/startup/ysize", lastheight = height);
 880
 881     guiInitMouse(width, height);
 882
 883     // for all views
 884     FGViewMgr *viewmgr = globals->get_viewmgr();
 885     if (viewmgr) {
 886       for ( int i = 0; i < viewmgr->size(); ++i ) {
 887         viewmgr->get_view(i)->
 888           set_aspect_ratio((float)view_h / (float)width);
 889       }
 890
 891       setFOV( viewmgr->get_current_view()->get_h_fov(),
 892               viewmgr->get_current_view()->get_v_fov() );
 893     }
 894 }
 895
 896
 897 // we need some static storage space for these values.  However, we
 898 // can't store it in a renderer class object because the functions
 899 // that manipulate these are static.  They are static so they can
 900 // interface to the display callback system.  There's probably a
 901 // better way, there has to be a better way, but I'm not seeing it
 902 // right now.
 903 static float fov_width = 55.0;
 904 static float fov_height = 42.0;
 905 static float fov_near = 1.0;
 906 static float fov_far = 1000.0;
 907
 908
 909 /** FlightGear code should use this routine to set the FOV rather than
 910  *  calling the ssg routine directly
 911  */
 912 void FGRenderer::setFOV( float w, float h ) {
 913     fov_width = w;
 914     fov_height = h;
 915     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 916     if (viewer)
 917         viewer->getCamera()->setProjectionMatrixAsPerspective(fov_height, 4.0/3.0, fov_near, fov_far);
 918     else
 919         sceneView->setProjectionMatrixAsPerspective(fov_height,
 920                                                     fov_width/fov_height,
 921                                                     fov_near, fov_far);
 922 }
 923
 924
 925 /** FlightGear code should use this routine to set the Near/Far clip
 926  *  planes rather than calling the ssg routine directly
 927  */
 928 void FGRenderer::setNearFar( float n, float f ) {
 929 // OSGFIXME: we have currently too much z-buffer fights
 930 n = 0.1;
 931     fov_near = n;
 932     fov_far = f;
 933     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 934     if (viewer)
 935         viewer->getCamera()->setProjectionMatrixAsPerspective(fov_height, 4.0/3.0, fov_near, fov_far);
 936     else
 937         sceneView->setProjectionMatrixAsPerspective(fov_height,
 938                                                     fov_width/fov_height,
 939                                                     fov_near, fov_far);
 940
 941 }
 942
 943 bool
 944 FGRenderer::pick( unsigned x, unsigned y,
 945                   std::vector<SGSceneryPick>& pickList,
 946                   const osgGA::GUIEventAdapter* ea )
 947 {
 948   osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 949   // wipe out the return ...
 950   pickList.resize(0);
 951
 952   if (sceneView.valid()) {
 953     osg::Node* sceneData = globals->get_scenery()->get_scene_graph();
 954     if (!sceneData)
 955       return false;
 956
 957     osg::Viewport* viewport = sceneView->getViewport();
 958     if (!viewport)
 959       return false;
 960     // don't know why, but the update has partly happened somehow,
 961     // so update the scenery part of the viewer
 962     FGViewer *current_view = globals->get_current_view();
 963     // Force update of center dependent values ...
 964     current_view->set_dirty();
 965     SGVec3d position = current_view->getViewPosition();
 966     SGQuatd attitude = current_view->getViewOrientation();
 967     SGVec3d osgPosition = attitude.transform(-position);
 968     mCameraView->setPosition(osgPosition.osg());
 969     mCameraView->setAttitude(inverse(attitude).osg());
 970
 971     osg::Matrix projection(sceneView->getProjectionMatrix());
 972     osg::Matrix modelview(sceneView->getViewMatrix());
 973
 974     osg::NodePathList nodePath = sceneData->getParentalNodePaths();
 975     // modify the view matrix so that it accounts for this nodePath's
 976     // accumulated transform
 977     if (!nodePath.empty())
 978       modelview.preMult(computeLocalToWorld(nodePath.front()));
 979
 980     // swap the y values ...
 981     y = viewport->height() - y;
 982     // set up the pick visitor
 983     osgUtil::PickVisitor pickVisitor(viewport, projection, modelview, x, y);
 984     sceneData->accept(pickVisitor);
 985     if (!pickVisitor.hits())
 986       return false;
 987
 988     // collect all interaction callbacks on the pick ray.
 989     // They get stored in the pickCallbacks list where they are sorted back
 990     // to front and croasest to finest wrt the scenery node they are attached to
 991     osgUtil::PickVisitor::LineSegmentHitListMap::const_iterator mi;
 992     for (mi = pickVisitor.getSegHitList().begin();
 993          mi != pickVisitor.getSegHitList().end();
 994          ++mi) {
 995       osgUtil::IntersectVisitor::HitList::const_iterator hi;
 996       for (hi = mi->second.begin(); hi != mi->second.end(); ++hi) {
 997         // ok, go back the nodes and ask for intersection callbacks,
 998         // execute them in top down order
 999         const osg::NodePath& np = hi->getNodePath();
1000         osg::NodePath::const_reverse_iterator npi;
1001         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1002           SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1003           if (!ud)
1004             continue;
1005           for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1006             SGPickCallback* pickCallback = ud->getPickCallback(i);
1007             if (!pickCallback)
1008               continue;
1009             SGSceneryPick sceneryPick;
1010             /// note that this is done totally in doubles instead of
1011             /// just using getWorldIntersectionPoint
1012             osg::Vec3d localPt = hi->getLocalIntersectPoint();
1013             sceneryPick.info.local = SGVec3d(localPt);
1014             if (hi->getMatrix())
1015               sceneryPick.info.wgs84 = SGVec3d(localPt*(*hi->getMatrix()));
1016             else
1017               sceneryPick.info.wgs84 = SGVec3d(localPt);
1018             sceneryPick.callback = pickCallback;
1019             pickList.push_back(sceneryPick);
1020           }
1021         }
1022       }
1023     }
1024
1025     return !pickList.empty();
1026
1027   } else if (viewer) {
1028
1029     // just compute intersections in the viewers method ...
1030     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
1031     Intersections intersections;
1032     viewer->computeIntersections(ea->getX(), ea->getY(), intersections);
1033
1034     Intersections::iterator hit;
1035     for (hit = intersections.begin(); hit != intersections.end(); ++hit) {
1036       const osg::NodePath& np = hit->nodePath;
1037       osg::NodePath::const_reverse_iterator npi;
1038       for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1039         SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1040         if (!ud)
1041           continue;
1042         for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1043           SGPickCallback* pickCallback = ud->getPickCallback(i);
1044           if (!pickCallback)
1045             continue;
1046           SGSceneryPick sceneryPick;
1047           sceneryPick.info.local = SGVec3d(hit->getLocalIntersectPoint());
1048           sceneryPick.info.wgs84 = SGVec3d(hit->getWorldIntersectPoint());
1049           sceneryPick.callback = pickCallback;
1050           pickList.push_back(sceneryPick);
1051         }
1052       }
1053     }
1054
1055     return !pickList.empty();
1056   } else {                      // we can get called early ...
1057     return false;
1058   }
1059 }
1060
1061 void
1062 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
1063 {
1064     mRealRoot->addChild(camera);
1065 }
1066
1067 bool
1068 fgDumpSceneGraphToFile(const char* filename)
1069 {
1070     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
1071 }
1072
1073 // end of renderer.cxx
1074