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 "splash.hxx"
 102 #include "renderer.hxx"
 103 #include "main.hxx"
 104
 105 // XXX Make this go away when OSG 2.2 is released.
 106 #if ((2 <= OSG_VERSION_MAJOR) && (1 <= OSG_VERSION_MINOR) \
 107      && (4 <= OSG_VERSION_PATCH))
 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 #ifdef ENABLE_OSGVIEWER
 377    manipulator = new FGManipulator;
 378 #endif
 379 }
 380
 381 FGRenderer::~FGRenderer()
 382 {
 383 #ifdef FG_JPEG_SERVER
 384    jpgRenderFrame = NULL;
 385 #endif
 386 }
 387
 388 // Initialize various GL/view parameters
 389 // XXX This should be called "preinit" or something, as it initializes
 390 // critical parts of the scene graph in addition to the splash screen.
 391 void
 392 FGRenderer::splashinit( void ) {
 393     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 394     if (viewer) {
 395         sceneView = 0;
 396         mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 397         mRealRoot->addChild(fgCreateSplashNode());
 398         mFrameStamp = viewer->getFrameStamp();
 399         // Scene doesn't seem to pass the frame stamp to the update
 400         // visitor automatically.
 401         mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 402 #ifdef UPDATE_VISITOR_IN_VIEWER
 403         viewer->setUpdateVisitor(mUpdateVisitor.get());
 404 #else
 405         osgViewer::Scene* scene = viewer->getScene();
 406         scene->setUpdateVisitor(mUpdateVisitor.get());
 407 #endif
 408     } else {
 409         // Add the splash screen node
 410         mRealRoot->addChild(fgCreateSplashNode());
 411         sceneView->setSceneData(mRealRoot.get());
 412         sceneView->setDefaults(osgUtil::SceneView::COMPILE_GLOBJECTS_AT_INIT);
 413         sceneView->setFrameStamp(mFrameStamp.get());
 414         sceneView->setUpdateVisitor(mUpdateVisitor.get());
 415     }
 416 }
 417
 418 void
 419 FGRenderer::init( void ) {
 420     // The viewer can call this before the graphics context is current
 421     // in the main thread; indeed, in a multithreaded setup it might
 422     // never be current in the main thread.
 423     fgMakeCurrent();
 424     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 425     osg::initNotifyLevel();
 426
 427     // The number of polygon-offset "units" to place between layers.  In
 428     // principle, one is supposed to be enough.  In practice, I find that
 429     // my hardware/driver requires many more.
 430     osg::PolygonOffset::setUnitsMultiplier(1);
 431     osg::PolygonOffset::setFactorMultiplier(1);
 432
 433     // Go full screen if requested ...
 434     if ( fgGetBool("/sim/startup/fullscreen") )
 435         fgOSFullScreen();
 436
 437     if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
 438          (!fgGetBool("/sim/rendering/shading"))) {
 439         // if fastest fog requested, or if flat shading force fastest
 440         glHint ( GL_FOG_HINT, GL_FASTEST );
 441     } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
 442         glHint ( GL_FOG_HINT, GL_DONT_CARE );
 443     }
 444
 445     glHint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 446     glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 447     glHint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 448
 449     if (viewer) {
 450       viewer->getCamera()
 451             ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 452     } else {
 453         sceneView->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 454         sceneView->getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 455     }
 456
 457
 458     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 459
 460     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 461
 462     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 463     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 464
 465     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 466     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 467     stateSet->setAttribute(new osg::BlendFunc);
 468     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 469
 470     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 471
 472     // this will be set below
 473     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 474
 475     osg::Material* material = new osg::Material;
 476     stateSet->setAttribute(material);
 477
 478     stateSet->setTextureAttribute(0, new osg::TexEnv);
 479     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 480
 481
 482 //     stateSet->setAttribute(new osg::CullFace(osg::CullFace::BACK));
 483 //     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
 484
 485     // this is the topmost scenegraph node for osg
 486     mBackGroundCamera->addChild(thesky->getPreRoot());
 487     mBackGroundCamera->setClearMask(0);
 488
 489     GLbitfield inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 490     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 491     inheritanceMask &= ~osg::CullSettings::NEAR_FAR_RATIO;
 492     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 493     mBackGroundCamera->setInheritanceMask(inheritanceMask);
 494     mBackGroundCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 495     mBackGroundCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 496     mBackGroundCamera->setRenderOrder(osg::Camera::NESTED_RENDER);
 497
 498     stateSet = mBackGroundCamera->getOrCreateStateSet();
 499     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 500
 501     osg::Group* sceneGroup = new osg::Group;
 502     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 503     sceneGroup->addChild(thesky->getCloudRoot());
 504
 505     stateSet = sceneGroup->getOrCreateStateSet();
 506     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 507     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 508
 509     // need to update the light on every frame
 510     osg::LightSource* lightSource = new osg::LightSource;
 511     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 512     // relative because of CameraView being just a clever transform node
 513     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 514     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 515     mRoot->addChild(lightSource);
 516
 517     lightSource->addChild(mBackGroundCamera.get());
 518     lightSource->addChild(sceneGroup);
 519
 520
 521     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 522     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 523     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 524     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 525     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 526
 527     // enable disable specular highlights.
 528     // is the place where we might plug in an other fragment shader ...
 529     osg::LightModel* lightModel = new osg::LightModel;
 530     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 531     stateSet->setAttribute(lightModel);
 532
 533     // switch to enable wireframe
 534     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 535     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 536     stateSet->setAttributeAndModes(polygonMode);
 537
 538     // scene fog handling
 539     osg::Fog* fog = new osg::Fog;
 540     fog->setUpdateCallback(new FGFogUpdateCallback);
 541     stateSet->setAttributeAndModes(fog);
 542     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 543
 544     // plug in the GUI
 545     osg::Camera* guiCamera = new osg::Camera;
 546     guiCamera->setRenderOrder(osg::Camera::POST_RENDER, 100);
 547     guiCamera->setClearMask(0);
 548     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 549     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 550     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 551     guiCamera->setInheritanceMask(inheritanceMask);
 552     guiCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 553     guiCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 554     osg::Geode* geode = new osg::Geode;
 555     geode->addDrawable(new SGPuDrawable);
 556     geode->addDrawable(new SGHUDAndPanelDrawable);
 557     guiCamera->addChild(geode);
 558
 559     mCameraView->addChild(mRoot.get());
 560
 561     osg::Switch* sw = new osg::Switch;
 562     sw->setUpdateCallback(new FGScenerySwitchCallback);
 563     sw->addChild(mCameraView.get());
 564
 565     mRealRoot->addChild(sw);
 566     mRealRoot->addChild(FGCreateRedoutNode());
 567     mRealRoot->addChild(guiCamera);
 568 //  sceneView->getState()->setCheckForGLErrors(osg::State::ONCE_PER_ATTRIBUTE);
 569 }
 570
 571
 572 // Update all Visuals (redraws anything graphics related)
 573 void
 574 FGRenderer::update( bool refresh_camera_settings ) {
 575     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 576                           || fgGetBool("sim/sceneryloaded-override");
 577     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 578     if ( idle_state < 1000 || !scenery_loaded ) {
 579         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 580
 581         // Keep resetting sim time while the sim is initializing
 582         globals->set_sim_time_sec( 0.0 );
 583
 584         // the splash screen is now in the scenegraph
 585         if (!viewer) {
 586             sceneView->update();
 587             sceneView->cull();
 588             sceneView->draw();
 589         }
 590         return;
 591     }
 592
 593     // Fade out the splash screen over the first three seconds.
 594     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 595     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 596
 597     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 598     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 599     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 600     bool distance_attenuation
 601         = fgGetBool("/sim/rendering/distance-attenuation");
 602     // OSGFIXME
 603     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 604                                   distance_attenuation );
 605
 606     static const SGPropertyNode *groundlevel_nearplane
 607         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 608
 609     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 610
 611     // update fog params
 612     double actual_visibility;
 613     if (fgGetBool("/environment/clouds/status")) {
 614         actual_visibility = thesky->get_visibility();
 615     } else {
 616         actual_visibility = fgGetDouble("/environment/visibility-m");
 617     }
 618
 619     // idle_state is now 1000 meaning we've finished all our
 620     // initializations and are running the main loop, so this will
 621     // now work without seg faulting the system.
 622
 623     FGViewer *current__view = globals->get_current_view();
 624     // Force update of center dependent values ...
 625     current__view->set_dirty();
 626
 627     if ( refresh_camera_settings ) {
 628         // update view port
 629         resize( fgGetInt("/sim/startup/xsize"),
 630                 fgGetInt("/sim/startup/ysize") );
 631
 632         SGVec3d position = current__view->getViewPosition();
 633         SGQuatd attitude = current__view->getViewOrientation();
 634         SGVec3d osgPosition = attitude.transform(-position);
 635         if (viewer) {
 636             FGManipulator *manipulator
 637                 = globals->get_renderer()->getManipulator();
 638             manipulator->setPosition(position.osg());
 639             manipulator->setAttitude(attitude.osg());
 640         } else {
 641             mCameraView->setPosition(osgPosition.osg());
 642             mCameraView->setAttitude(inverse(attitude).osg());
 643         }
 644     }
 645     osg::Camera *camera;
 646     if (viewer)
 647         camera = viewer->getCamera();
 648     else
 649         camera = sceneView->getCamera();
 650     if ( skyblend ) {
 651
 652         if ( fgGetBool("/sim/rendering/textures") ) {
 653             SGVec4f clearColor(l->adj_fog_color());
 654             camera->setClearColor(clearColor.osg());
 655         }
 656     } else {
 657         SGVec4f clearColor(l->sky_color());
 658         camera->setClearColor(clearColor.osg());
 659     }
 660
 661     // update fog params if visibility has changed
 662     double visibility_meters = fgGetDouble("/environment/visibility-m");
 663     thesky->set_visibility(visibility_meters);
 664
 665     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 666                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 667                         / (double)fgGetInt("/sim/model-hz") );
 668
 669     // update the sky dome
 670     if ( skyblend ) {
 671
 672         // The sun and moon distances are scaled down versions
 673         // of the actual distance to get both the moon and the sun
 674         // within the range of the far clip plane.
 675         // Moon distance:    384,467 kilometers
 676         // Sun distance: 150,000,000 kilometers
 677
 678         double sun_horiz_eff, moon_horiz_eff;
 679         if (fgGetBool("/sim/rendering/horizon-effect")) {
 680            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 681            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 682         } else {
 683            sun_horiz_eff = moon_horiz_eff = 1.0;
 684         }
 685
 686         static SGSkyState sstate;
 687
 688         sstate.view_pos  = toVec3f(current__view->get_view_pos());
 689         sstate.zero_elev = toVec3f(current__view->get_zero_elev());
 690         sstate.view_up   = current__view->get_world_up();
 691         sstate.lon       = current__view->getLongitude_deg()
 692                             * SGD_DEGREES_TO_RADIANS;
 693         sstate.lat       = current__view->getLatitude_deg()
 694                             * SGD_DEGREES_TO_RADIANS;
 695         sstate.alt       = current__view->getAltitudeASL_ft()
 696                             * SG_FEET_TO_METER;
 697         sstate.spin      = l->get_sun_rotation();
 698         sstate.gst       = globals->get_time_params()->getGst();
 699         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 700         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 701         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 702         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 703         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 704         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 705         sstate.sun_angle = l->get_sun_angle();
 706
 707
 708         /*
 709          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 710          << l->sky_color()[0] << " "
 711          << l->sky_color()[1] << " "
 712          << l->sky_color()[2] << " "
 713          << l->sky_color()[3] );
 714         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 715          << l->fog_color()[0] << " "
 716          << l->fog_color()[1] << " "
 717          << l->fog_color()[2] << " "
 718          << l->fog_color()[3] );
 719         SG_LOG( SG_GENERAL, SG_BULK,
 720                 "    sun_angle = " << l->sun_angle
 721          << "    moon_angle = " << l->moon_angle );
 722         */
 723
 724         static SGSkyColor scolor;
 725
 726         scolor.sky_color   = SGVec3f(l->sky_color().data());
 727         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 728         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 729         scolor.sun_angle   = l->get_sun_angle();
 730         scolor.moon_angle  = l->get_moon_angle();
 731         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 732         scolor.nstars      = globals->get_ephem()->getNumStars();
 733         scolor.planet_data = globals->get_ephem()->getPlanets();
 734         scolor.star_data   = globals->get_ephem()->getStars();
 735
 736         thesky->reposition( sstate, delta_time_sec );
 737         thesky->repaint( scolor );
 738
 739         /*
 740         SG_LOG( SG_GENERAL, SG_BULK,
 741                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 742          << view_pos[1] << " " << view_pos[2] );
 743         SG_LOG( SG_GENERAL, SG_BULK,
 744                 "    zero_elev = " << zero_elev[0] << " "
 745          << zero_elev[1] << " " << zero_elev[2]
 746          << " lon = " << cur_fdm_state->get_Longitude()
 747          << " lat = " << cur_fdm_state->get_Latitude() );
 748         SG_LOG( SG_GENERAL, SG_BULK,
 749                 "    sun_rot = " << l->get_sun_rotation
 750          << " gst = " << SGTime::cur_time_params->getGst() );
 751         SG_LOG( SG_GENERAL, SG_BULK,
 752              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 753           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 754           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 755           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 756         */
 757
 758         //OSGFIXME
 759 //         shadows->setupShadows(
 760 //           current__view->getLongitude_deg(),
 761 //           current__view->getLatitude_deg(),
 762 //           globals->get_time_params()->getGst(),
 763 //           globals->get_ephem()->getSunRightAscension(),
 764 //           globals->get_ephem()->getSunDeclination(),
 765 //           l->get_sun_angle());
 766
 767     }
 768
 769 //     sgEnviro.setLight(l->adj_fog_color());
 770
 771     // texture parameters
 772     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
 773
 774     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 775       - current__view->getSGLocation()->get_cur_elev_m();
 776
 777     float scene_nearplane, scene_farplane;
 778     if ( agl > 10.0 ) {
 779         scene_nearplane = 10.0f;
 780         scene_farplane = 120000.0f;
 781     } else {
 782         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 783         scene_farplane = 120000.0f;
 784     }
 785     setNearFar( scene_nearplane, scene_farplane );
 786
 787 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 788 //         current__view->get_world_up(),
 789 //         current__view->getLongitude_deg(),
 790 //         current__view->getLatitude_deg(),
 791 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 792 //         delta_time_sec);
 793
 794     // OSGFIXME
 795 //     sgEnviro.drawLightning();
 796
 797 //        double current_view_origin_airspeed_horiz_kt =
 798 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 799 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 800 //                                * SGD_DEGREES_TO_RADIANS);
 801        // TODO:find the real view speed, not the AC one
 802 //     sgEnviro.drawPrecipitation(
 803 //         fgGetDouble("/environment/metar/rain-norm", 0.0),
 804 //         fgGetDouble("/environment/metar/snow-norm", 0.0),
 805 //         fgGetDouble("/environment/metar/hail-norm", 0.0),
 806 //         current__view->getPitch_deg() + current__view->getPitchOffset_deg(),
 807 //         current__view->getRoll_deg() + current__view->getRollOffset_deg(),
 808 //         - current__view->getHeadingOffset_deg(),
 809 //                current_view_origin_airspeed_horiz_kt
 810 //                );
 811
 812     // OSGFIXME
 813 //     if( is_internal )
 814 //         shadows->endOfFrame();
 815
 816     // need to call the update visitor once
 817     if (!viewer) {
 818         mFrameStamp->setReferenceTime(globals->get_sim_time_sec());
 819         mFrameStamp->setSimulationTime(globals->get_sim_time_sec());
 820         mFrameStamp->setFrameNumber(1+mFrameStamp->getFrameNumber());
 821     }
 822     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 823     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 824                                 current__view->getViewOrientation());
 825     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 826     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 827                              l->scene_diffuse(), l->scene_specular(),
 828                              l->adj_fog_color(),
 829                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 830     mUpdateVisitor->setVisibility(actual_visibility);
 831     bool hotspots = fgGetBool("/sim/panel-hotspots");
 832     if (viewer) {
 833         if (hotspots)
 834             camera->setCullMask(camera->getCullMask()|SG_NODEMASK_PICK_BIT);
 835         else
 836             camera->setCullMask(camera->getCullMask()
 837                                 & ~SG_NODEMASK_PICK_BIT);
 838     } else {
 839         if (hotspots)
 840             sceneView->setCullMask(sceneView->getCullMask()
 841                                    |SG_NODEMASK_PICK_BIT);
 842         else
 843             sceneView->setCullMask(sceneView->getCullMask()
 844                                    &(~SG_NODEMASK_PICK_BIT));
 845         sceneView->update();
 846         sceneView->cull();
 847         sceneView->draw();
 848     }
 849 }
 850
 851
 852
 853 // options.cxx needs to see this for toggle_panel()
 854 // Handle new window size or exposure
 855 void
 856 FGRenderer::resize( int width, int height ) {
 857     int view_h;
 858
 859     if ( (!fgGetBool("/sim/virtual-cockpit"))
 860          && fgPanelVisible() && idle_state == 1000 ) {
 861         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 862                              globals->get_current_panel()->getYOffset()) / 768.0);
 863     } else {
 864         view_h = height;
 865     }
 866     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 867     if (viewer)
 868         ;
 869   //       viewer->getCamera()->getViewport()->setViewport(0, height - view_h,
 870 //                                                         width, view_h);
 871     else
 872         sceneView->getViewport()->setViewport(0, height - view_h,
 873                                               width, view_h);
 874
 875     static int lastwidth = 0;
 876     static int lastheight = 0;
 877     if (width != lastwidth)
 878         fgSetInt("/sim/startup/xsize", lastwidth = width);
 879     if (height != lastheight)
 880         fgSetInt("/sim/startup/ysize", lastheight = height);
 881
 882     guiInitMouse(width, height);
 883
 884     // for all views
 885     FGViewMgr *viewmgr = globals->get_viewmgr();
 886     if (viewmgr) {
 887       for ( int i = 0; i < viewmgr->size(); ++i ) {
 888         viewmgr->get_view(i)->
 889           set_aspect_ratio((float)view_h / (float)width);
 890       }
 891
 892       setFOV( viewmgr->get_current_view()->get_h_fov(),
 893               viewmgr->get_current_view()->get_v_fov() );
 894     }
 895 }
 896
 897
 898 // we need some static storage space for these values.  However, we
 899 // can't store it in a renderer class object because the functions
 900 // that manipulate these are static.  They are static so they can
 901 // interface to the display callback system.  There's probably a
 902 // better way, there has to be a better way, but I'm not seeing it
 903 // right now.
 904 static float fov_width = 55.0;
 905 static float fov_height = 42.0;
 906 static float fov_near = 1.0;
 907 static float fov_far = 1000.0;
 908
 909
 910 /** FlightGear code should use this routine to set the FOV rather than
 911  *  calling the ssg routine directly
 912  */
 913 void FGRenderer::setFOV( float w, float h ) {
 914     fov_width = w;
 915     fov_height = h;
 916     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 917     if (viewer)
 918         viewer->getCamera()->setProjectionMatrixAsPerspective(fov_height, 4.0/3.0, fov_near, fov_far);
 919     else
 920         sceneView->setProjectionMatrixAsPerspective(fov_height,
 921                                                     fov_width/fov_height,
 922                                                     fov_near, fov_far);
 923 }
 924
 925
 926 /** FlightGear code should use this routine to set the Near/Far clip
 927  *  planes rather than calling the ssg routine directly
 928  */
 929 void FGRenderer::setNearFar( float n, float f ) {
 930 // OSGFIXME: we have currently too much z-buffer fights
 931 n = 0.1;
 932     fov_near = n;
 933     fov_far = f;
 934     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 935     if (viewer)
 936         viewer->getCamera()->setProjectionMatrixAsPerspective(fov_height, 4.0/3.0, fov_near, fov_far);
 937     else
 938         sceneView->setProjectionMatrixAsPerspective(fov_height,
 939                                                     fov_width/fov_height,
 940                                                     fov_near, fov_far);
 941
 942 }
 943
 944 bool
 945 FGRenderer::pick( unsigned x, unsigned y,
 946                   std::vector<SGSceneryPick>& pickList,
 947                   const osgGA::GUIEventAdapter* ea )
 948 {
 949   osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 950   // wipe out the return ...
 951   pickList.resize(0);
 952
 953   if (sceneView.valid()) {
 954     osg::Node* sceneData = globals->get_scenery()->get_scene_graph();
 955     if (!sceneData)
 956       return false;
 957
 958     osg::Viewport* viewport = sceneView->getViewport();
 959     if (!viewport)
 960       return false;
 961     // don't know why, but the update has partly happened somehow,
 962     // so update the scenery part of the viewer
 963     FGViewer *current_view = globals->get_current_view();
 964     // Force update of center dependent values ...
 965     current_view->set_dirty();
 966     SGVec3d position = current_view->getViewPosition();
 967     SGQuatd attitude = current_view->getViewOrientation();
 968     SGVec3d osgPosition = attitude.transform(-position);
 969     mCameraView->setPosition(osgPosition.osg());
 970     mCameraView->setAttitude(inverse(attitude).osg());
 971
 972     osg::Matrix projection(sceneView->getProjectionMatrix());
 973     osg::Matrix modelview(sceneView->getViewMatrix());
 974
 975     osg::NodePathList nodePath = sceneData->getParentalNodePaths();
 976     // modify the view matrix so that it accounts for this nodePath's
 977     // accumulated transform
 978     if (!nodePath.empty())
 979       modelview.preMult(computeLocalToWorld(nodePath.front()));
 980
 981     // swap the y values ...
 982     y = viewport->height() - y;
 983     // set up the pick visitor
 984     osgUtil::PickVisitor pickVisitor(viewport, projection, modelview, x, y);
 985     sceneData->accept(pickVisitor);
 986     if (!pickVisitor.hits())
 987       return false;
 988
 989     // collect all interaction callbacks on the pick ray.
 990     // They get stored in the pickCallbacks list where they are sorted back
 991     // to front and croasest to finest wrt the scenery node they are attached to
 992     osgUtil::PickVisitor::LineSegmentHitListMap::const_iterator mi;
 993     for (mi = pickVisitor.getSegHitList().begin();
 994          mi != pickVisitor.getSegHitList().end();
 995          ++mi) {
 996       osgUtil::IntersectVisitor::HitList::const_iterator hi;
 997       for (hi = mi->second.begin(); hi != mi->second.end(); ++hi) {
 998         // ok, go back the nodes and ask for intersection callbacks,
 999         // execute them in top down order
1000         const osg::NodePath& np = hi->getNodePath();
1001         osg::NodePath::const_reverse_iterator npi;
1002         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1003           SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1004           if (!ud)
1005             continue;
1006           for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1007             SGPickCallback* pickCallback = ud->getPickCallback(i);
1008             if (!pickCallback)
1009               continue;
1010             SGSceneryPick sceneryPick;
1011             /// note that this is done totally in doubles instead of
1012             /// just using getWorldIntersectionPoint
1013             osg::Vec3d localPt = hi->getLocalIntersectPoint();
1014             sceneryPick.info.local = SGVec3d(localPt);
1015             if (hi->getMatrix())
1016               sceneryPick.info.wgs84 = SGVec3d(localPt*(*hi->getMatrix()));
1017             else
1018               sceneryPick.info.wgs84 = SGVec3d(localPt);
1019             sceneryPick.callback = pickCallback;
1020             pickList.push_back(sceneryPick);
1021           }
1022         }
1023       }
1024     }
1025
1026     return !pickList.empty();
1027
1028   } else if (viewer) {
1029
1030     // just compute intersections in the viewers method ...
1031     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
1032     Intersections intersections;
1033     viewer->computeIntersections(ea->getX(), ea->getY(), intersections);
1034
1035     Intersections::iterator hit;
1036     for (hit = intersections.begin(); hit != intersections.end(); ++hit) {
1037       const osg::NodePath& np = hit->nodePath;
1038       osg::NodePath::const_reverse_iterator npi;
1039       for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1040         SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1041         if (!ud)
1042           continue;
1043         for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1044           SGPickCallback* pickCallback = ud->getPickCallback(i);
1045           if (!pickCallback)
1046             continue;
1047           SGSceneryPick sceneryPick;
1048           sceneryPick.info.local = SGVec3d(hit->getLocalIntersectPoint());
1049           sceneryPick.info.wgs84 = SGVec3d(hit->getWorldIntersectPoint());
1050           sceneryPick.callback = pickCallback;
1051           pickList.push_back(sceneryPick);
1052         }
1053       }
1054     }
1055
1056     return !pickList.empty();
1057   } else {                      // we can get called early ...
1058     return false;
1059   }
1060 }
1061
1062 void
1063 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
1064 {
1065     mRealRoot->addChild(camera);
1066 }
1067
1068 bool
1069 fgDumpSceneGraphToFile(const char* filename)
1070 {
1071     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
1072 }
1073
1074 // end of renderer.cxx
1075