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 #ifdef HAVE_CONFIG_H
  23 #  include <config.h>
  24 #endif
  25
  26 #include <simgear/compiler.h>
  27
  28 #include <osg/ref_ptr>
  29 #include <osg/AlphaFunc>
  30 #include <osg/BlendFunc>
  31 #include <osg/Camera>
  32 #include <osg/CullFace>
  33 #include <osg/Depth>
  34 #include <osg/Fog>
  35 #include <osg/Group>
  36 #include <osg/Hint>
  37 #include <osg/Light>
  38 #include <osg/LightModel>
  39 #include <osg/LightSource>
  40 #include <osg/NodeCallback>
  41 #include <osg/Notify>
  42 #include <osg/PolygonMode>
  43 #include <osg/PolygonOffset>
  44 #include <osg/ShadeModel>
  45 #include <osg/Version>
  46 #include <osg/TexEnv>
  47
  48 #include <osgUtil/SceneView>
  49 #include <osgUtil/UpdateVisitor>
  50 #include <osgUtil/IntersectVisitor>
  51 #include <osgUtil/LineSegmentIntersector>
  52
  53 #include <osg/io_utils>
  54 #include <osgDB/WriteFile>
  55 #include <osgDB/ReadFile>
  56 #include <sstream>
  57
  58 #include <simgear/math/SGMath.hxx>
  59 #include <simgear/screen/extensions.hxx>
  60 #include <simgear/scene/material/matlib.hxx>
  61 #include <simgear/scene/model/animation.hxx>
  62 #include <simgear/scene/model/placement.hxx>
  63 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  64 #include <simgear/scene/util/RenderConstants.hxx>
  65 #include <simgear/scene/tgdb/GroundLightManager.hxx>
  66 #include <simgear/scene/tgdb/pt_lights.hxx>
  67 #include <simgear/props/props.hxx>
  68 #include <simgear/timing/sg_time.hxx>
  69 #include <simgear/ephemeris/ephemeris.hxx>
  70 #include <simgear/math/sg_random.h>
  71 #ifdef FG_JPEG_SERVER
  72 #include <simgear/screen/jpgfactory.hxx>
  73 #endif
  74
  75 #include <simgear/environment/visual_enviro.hxx>
  76
  77 #include <Time/light.hxx>
  78 #include <Time/light.hxx>
  79 #include <Aircraft/aircraft.hxx>
  80 #include <Cockpit/panel.hxx>
  81 #include <Cockpit/cockpit.hxx>
  82 #include <Cockpit/hud.hxx>
  83 #include <Model/panelnode.hxx>
  84 #include <Model/modelmgr.hxx>
  85 #include <Model/acmodel.hxx>
  86 #include <Scenery/scenery.hxx>
  87 #include <Scenery/redout.hxx>
  88 #include <Scenery/tilemgr.hxx>
  89 #include <GUI/new_gui.hxx>
  90 #include <Instrumentation/instrument_mgr.hxx>
  91 #include <Instrumentation/HUD/HUD.hxx>
  92 #include <Environment/precipitation_mgr.hxx>
  93
  94 #include <Include/general.hxx>
  95 #include "splash.hxx"
  96 #include "renderer.hxx"
  97 #include "main.hxx"
  98 #include "ViewPartitionNode.hxx"
  99
 100 // XXX Make this go away when OSG 2.2 is released.
 101 #if (FG_OSG_VERSION >= 21004)
 102 #define UPDATE_VISITOR_IN_VIEWER 1
 103 #endif
 104
 105 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 106 public:
 107   FGHintUpdateCallback(const char* configNode) :
 108     mConfigNode(fgGetNode(configNode, true))
 109   { }
 110   virtual void operator()(osg::StateAttribute* stateAttribute,
 111                           osg::NodeVisitor*)
 112   {
 113     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 114     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 115
 116     const char* value = mConfigNode->getStringValue();
 117     if (!value)
 118       hint->setMode(GL_DONT_CARE);
 119     else if (0 == strcmp(value, "nicest"))
 120       hint->setMode(GL_NICEST);
 121     else if (0 == strcmp(value, "fastest"))
 122       hint->setMode(GL_FASTEST);
 123     else
 124       hint->setMode(GL_DONT_CARE);
 125   }
 126 private:
 127   SGSharedPtr<SGPropertyNode> mConfigNode;
 128 };
 129
 130
 131 class SGPuDrawable : public osg::Drawable {
 132 public:
 133   SGPuDrawable()
 134   {
 135     // Dynamic stuff, do not store geometry
 136     setUseDisplayList(false);
 137
 138     osg::StateSet* stateSet = getOrCreateStateSet();
 139     stateSet->setRenderBinDetails(1001, "RenderBin");
 140     // speed optimization?
 141     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 142     // We can do translucent menus, so why not. :-)
 143     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 144     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 145     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 146
 147     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 148
 149     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 150     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 151   }
 152   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 153   { drawImplementation(*renderInfo.getState()); }
 154   void drawImplementation(osg::State& state) const
 155   {
 156     if (!fgOSIsMainContext(state.getGraphicsContext()))
 157       return;
 158     state.setActiveTextureUnit(0);
 159     state.setClientActiveTextureUnit(0);
 160
 161     state.disableAllVertexArrays();
 162
 163     glPushAttrib(GL_ALL_ATTRIB_BITS);
 164     glPushClientAttrib(~0u);
 165
 166     puDisplay();
 167
 168     glPopClientAttrib();
 169     glPopAttrib();
 170   }
 171
 172   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 173   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 174
 175 private:
 176 };
 177
 178 class SGHUDAndPanelDrawable : public osg::Drawable {
 179 public:
 180   SGHUDAndPanelDrawable()
 181   {
 182     // Dynamic stuff, do not store geometry
 183     setUseDisplayList(false);
 184
 185     osg::StateSet* stateSet = getOrCreateStateSet();
 186     stateSet->setRenderBinDetails(1000, "RenderBin");
 187
 188     // speed optimization?
 189     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 190     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 191     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 192     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 193     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 194
 195     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 196   }
 197   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 198   { drawImplementation(*renderInfo.getState()); }
 199   void drawImplementation(osg::State& state) const
 200   {
 201     if (!fgOSIsMainContext(state.getGraphicsContext()))
 202       return;
 203     state.setActiveTextureUnit(0);
 204     state.setClientActiveTextureUnit(0);
 205     state.disableAllVertexArrays();
 206
 207     glPushAttrib(GL_ALL_ATTRIB_BITS);
 208     glPushClientAttrib(~0u);
 209
 210     fgCockpitUpdate(&state);
 211
 212     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 213     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 214     hud->draw(state);
 215
 216     // update the panel subsystem
 217     if ( globals->get_current_panel() != NULL )
 218         globals->get_current_panel()->update(state);
 219     // We don't need a state here - can be safely removed when we can pick
 220     // correctly
 221     fgUpdate3DPanels();
 222
 223     glPopClientAttrib();
 224     glPopAttrib();
 225
 226   }
 227
 228   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 229   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 230
 231 private:
 232 };
 233
 234 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 235 public:
 236   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 237   {
 238     assert(dynamic_cast<osg::LightSource*>(node));
 239     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 240     osg::Light* light = lightSource->getLight();
 241
 242     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 243     light->setAmbient(l->scene_ambient().osg());
 244     light->setDiffuse(l->scene_diffuse().osg());
 245     light->setSpecular(l->scene_specular().osg());
 246     SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 247     light->setPosition(position.osg());
 248     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 249     light->setDirection(direction.osg());
 250     light->setSpotExponent(0);
 251     light->setSpotCutoff(180);
 252     light->setConstantAttenuation(1);
 253     light->setLinearAttenuation(0);
 254     light->setQuadraticAttenuation(0);
 255
 256     traverse(node, nv);
 257   }
 258 };
 259
 260 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 261 public:
 262   FGWireFrameModeUpdateCallback() :
 263     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 264   { }
 265   virtual void operator()(osg::StateAttribute* stateAttribute,
 266                           osg::NodeVisitor*)
 267   {
 268     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 269     osg::PolygonMode* polygonMode;
 270     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 271
 272     if (mWireframe->getBoolValue())
 273       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 274                            osg::PolygonMode::LINE);
 275     else
 276       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 277                            osg::PolygonMode::FILL);
 278   }
 279 private:
 280   SGSharedPtr<SGPropertyNode> mWireframe;
 281 };
 282
 283 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 284 public:
 285   FGLightModelUpdateCallback() :
 286     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 287   { }
 288   virtual void operator()(osg::StateAttribute* stateAttribute,
 289                           osg::NodeVisitor*)
 290   {
 291     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 292     osg::LightModel* lightModel;
 293     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 294
 295 #if 0
 296     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 297     lightModel->setAmbientIntensity(l->scene_ambient().osg());
 298 #else
 299     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 300 #endif
 301     lightModel->setTwoSided(true);
 302     lightModel->setLocalViewer(false);
 303
 304     if (mHighlights->getBoolValue()) {
 305       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 306     } else {
 307       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 308     }
 309   }
 310 private:
 311   SGSharedPtr<SGPropertyNode> mHighlights;
 312 };
 313
 314 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 315 public:
 316   FGFogEnableUpdateCallback() :
 317     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 318   { }
 319   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 320   {
 321     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 322       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 323     } else {
 324       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 325     }
 326   }
 327 private:
 328   SGSharedPtr<SGPropertyNode> mFogEnabled;
 329 };
 330
 331 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 332 public:
 333   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 334   {
 335     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 336     assert(dynamic_cast<osg::Fog*>(sa));
 337     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 338     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 339     fog->setMode(osg::Fog::EXP2);
 340     fog->setColor(updateVisitor->getFogColor().osg());
 341     fog->setDensity(updateVisitor->getFogExp2Density());
 342   }
 343 };
 344
 345 // update callback for the switch node guarding that splash
 346 class FGScenerySwitchCallback : public osg::NodeCallback {
 347 public:
 348   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 349   {
 350     assert(dynamic_cast<osg::Switch*>(node));
 351     osg::Switch* sw = static_cast<osg::Switch*>(node);
 352
 353     double t = globals->get_sim_time_sec();
 354     bool enabled = 0 < t;
 355     sw->setValue(0, enabled);
 356     if (!enabled)
 357       return;
 358     traverse(node, nv);
 359   }
 360 };
 361
 362 // Sky structures
 363 SGSky *thesky;
 364
 365 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 366 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 367
 368 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 369
 370 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 371
 372 static osg::ref_ptr<ViewPartitionNode> viewPartition = new ViewPartitionNode;
 373
 374 FGRenderer::FGRenderer()
 375 {
 376 #ifdef FG_JPEG_SERVER
 377    jpgRenderFrame = FGRenderer::update;
 378 #endif
 379    manipulator = new FGManipulator;
 380 }
 381
 382 FGRenderer::~FGRenderer()
 383 {
 384 #ifdef FG_JPEG_SERVER
 385    jpgRenderFrame = NULL;
 386 #endif
 387 }
 388
 389 // Initialize various GL/view parameters
 390 // XXX This should be called "preinit" or something, as it initializes
 391 // critical parts of the scene graph in addition to the splash screen.
 392 void
 393 FGRenderer::splashinit( void ) {
 394     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 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 }
 408
 409 namespace
 410 {
 411 // Create a slave camera that will be used to render a fixed GUI-like
 412 // element.
 413 osg::Camera*
 414 makeSlaveCamera(osg::Camera::RenderOrder renderOrder, int orderNum)
 415 {
 416     using namespace osg;
 417     Camera* camera = new osg::Camera;
 418     GraphicsContext *gc = fgOSGetMainContext();
 419
 420     camera->setRenderOrder(renderOrder, orderNum);
 421     camera->setClearMask(0);
 422     camera->setInheritanceMask(CullSettings::ALL_VARIABLES
 423                                & ~(CullSettings::COMPUTE_NEAR_FAR_MODE
 424                                    | CullSettings::CULLING_MODE));
 425     camera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 426     camera->setCullingMode(osg::CullSettings::NO_CULLING);
 427     camera->setGraphicsContext(gc);
 428     // Establish an initial viewport. This may be altered,
 429     // particularly when drawing a 2d panel.
 430     const GraphicsContext::Traits *traits = gc->getTraits();
 431     camera->setViewport(new Viewport(0, 0, traits->width, traits->height));
 432     camera->setProjectionResizePolicy(Camera::FIXED);
 433     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
 434     camera->setAllowEventFocus(false);
 435     globals->get_renderer()->getViewer()->addSlave(camera, false);
 436     return camera;
 437 }
 438
 439 }
 440
 441 void
 442 FGRenderer::init( void )
 443 {
 444     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 445     osg::initNotifyLevel();
 446
 447     // The number of polygon-offset "units" to place between layers.  In
 448     // principle, one is supposed to be enough.  In practice, I find that
 449     // my hardware/driver requires many more.
 450     osg::PolygonOffset::setUnitsMultiplier(1);
 451     osg::PolygonOffset::setFactorMultiplier(1);
 452
 453     // Go full screen if requested ...
 454     if ( fgGetBool("/sim/startup/fullscreen") )
 455         fgOSFullScreen();
 456
 457     viewer->getCamera()
 458         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 459
 460     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 461
 462     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 463
 464     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 465     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 466
 467     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 468     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 469     stateSet->setAttribute(new osg::BlendFunc);
 470     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 471
 472     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 473
 474     // this will be set below
 475     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 476
 477     osg::Material* material = new osg::Material;
 478     stateSet->setAttribute(material);
 479
 480     stateSet->setTextureAttribute(0, new osg::TexEnv);
 481     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 482
 483     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 484     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 485     stateSet->setAttribute(hint);
 486     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 487     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 488     stateSet->setAttribute(hint);
 489     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 490     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 491     stateSet->setAttribute(hint);
 492     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 493     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 494     stateSet->setAttribute(hint);
 495     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 496     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 497     stateSet->setAttribute(hint);
 498
 499     osg::Group* sceneGroup = new osg::Group;
 500     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 501     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 502
 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
 516     lightSource->addChild(sceneGroup);
 517     lightSource->addChild(thesky->getPreRoot());
 518     mRoot->addChild(lightSource);
 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 = makeSlaveCamera(osg::Camera::POST_RENDER, 100);
 545     guiCamera->setName("GUI");
 546     osg::Geode* geode = new osg::Geode;
 547     geode->addDrawable(new SGPuDrawable);
 548     geode->addDrawable(new SGHUDAndPanelDrawable);
 549     guiCamera->addChild(geode);
 550
 551     osg::Switch* sw = new osg::Switch;
 552     sw->setUpdateCallback(new FGScenerySwitchCallback);
 553     sw->addChild(mRoot.get());
 554     viewPartition->addChild(sw);
 555     viewPartition->addChild(thesky->getCloudRoot());
 556
 557     mRealRoot->addChild(viewPartition.get());
 558     mRealRoot->addChild(FGCreateRedoutNode());
 559 }
 560
 561
 562 // Update all Visuals (redraws anything graphics related)
 563 void
 564 FGRenderer::update( bool refresh_camera_settings ) {
 565     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 566                           || fgGetBool("sim/sceneryloaded-override");
 567     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 568     if ( idle_state < 1000 || !scenery_loaded ) {
 569         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 570
 571         // Keep resetting sim time while the sim is initializing
 572         // the splash screen is now in the scenegraph
 573         globals->set_sim_time_sec( 0.0 );
 574         return;
 575     }
 576
 577     // Fade out the splash screen over the first three seconds.
 578     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 579     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 580
 581     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 582     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 583     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 584     bool distance_attenuation
 585         = fgGetBool("/sim/rendering/distance-attenuation");
 586     // OSGFIXME
 587     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 588                                   distance_attenuation );
 589
 590     static const SGPropertyNode *groundlevel_nearplane
 591         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 592
 593     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 594
 595     // update fog params
 596     double actual_visibility;
 597     if (fgGetBool("/environment/clouds/status")) {
 598         actual_visibility = thesky->get_visibility();
 599     } else {
 600         actual_visibility = fgGetDouble("/environment/visibility-m");
 601     }
 602
 603     // idle_state is now 1000 meaning we've finished all our
 604     // initializations and are running the main loop, so this will
 605     // now work without seg faulting the system.
 606
 607     FGViewer *current__view = globals->get_current_view();
 608     // Force update of center dependent values ...
 609     current__view->set_dirty();
 610
 611     if ( refresh_camera_settings ) {
 612         // update view port
 613         resize( fgGetInt("/sim/startup/xsize"),
 614                 fgGetInt("/sim/startup/ysize") );
 615
 616         SGVec3d position = current__view->getViewPosition();
 617         SGQuatd attitude = current__view->getViewOrientation();
 618         SGVec3d osgPosition = attitude.transform(-position);
 619
 620         FGManipulator *manipulator = globals->get_renderer()->getManipulator();
 621         manipulator->setPosition(position.osg());
 622         manipulator->setAttitude(attitude.osg());
 623     }
 624     osg::Camera *camera = viewer->getCamera();
 625
 626     if ( skyblend ) {
 627
 628         if ( fgGetBool("/sim/rendering/textures") ) {
 629             SGVec4f clearColor(l->adj_fog_color());
 630             camera->setClearColor(clearColor.osg());
 631         }
 632     } else {
 633         SGVec4f clearColor(l->sky_color());
 634         camera->setClearColor(clearColor.osg());
 635     }
 636
 637     // update fog params if visibility has changed
 638     double visibility_meters = fgGetDouble("/environment/visibility-m");
 639     thesky->set_visibility(visibility_meters);
 640
 641     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 642                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 643                         / (double)fgGetInt("/sim/model-hz") );
 644
 645     // update the sky dome
 646     if ( skyblend ) {
 647
 648         // The sun and moon distances are scaled down versions
 649         // of the actual distance to get both the moon and the sun
 650         // within the range of the far clip plane.
 651         // Moon distance:    384,467 kilometers
 652         // Sun distance: 150,000,000 kilometers
 653
 654         double sun_horiz_eff, moon_horiz_eff;
 655         if (fgGetBool("/sim/rendering/horizon-effect")) {
 656            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 657            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 658         } else {
 659            sun_horiz_eff = moon_horiz_eff = 1.0;
 660         }
 661
 662         static SGSkyState sstate;
 663
 664         sstate.view_pos  = toVec3f(current__view->get_view_pos());
 665         sstate.zero_elev = toVec3f(current__view->get_zero_elev());
 666         sstate.view_up   = current__view->get_world_up();
 667         sstate.lon       = current__view->getLongitude_deg()
 668                             * SGD_DEGREES_TO_RADIANS;
 669         sstate.lat       = current__view->getLatitude_deg()
 670                             * SGD_DEGREES_TO_RADIANS;
 671         sstate.alt       = current__view->getAltitudeASL_ft()
 672                             * SG_FEET_TO_METER;
 673         sstate.spin      = l->get_sun_rotation();
 674         sstate.gst       = globals->get_time_params()->getGst();
 675         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 676         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 677         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 678         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 679         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 680         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 681         sstate.sun_angle = l->get_sun_angle();
 682
 683
 684         /*
 685          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 686          << l->sky_color()[0] << " "
 687          << l->sky_color()[1] << " "
 688          << l->sky_color()[2] << " "
 689          << l->sky_color()[3] );
 690         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 691          << l->fog_color()[0] << " "
 692          << l->fog_color()[1] << " "
 693          << l->fog_color()[2] << " "
 694          << l->fog_color()[3] );
 695         SG_LOG( SG_GENERAL, SG_BULK,
 696                 "    sun_angle = " << l->sun_angle
 697          << "    moon_angle = " << l->moon_angle );
 698         */
 699
 700         static SGSkyColor scolor;
 701
 702         scolor.sky_color   = SGVec3f(l->sky_color().data());
 703         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 704         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 705         scolor.sun_angle   = l->get_sun_angle();
 706         scolor.moon_angle  = l->get_moon_angle();
 707         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 708         scolor.nstars      = globals->get_ephem()->getNumStars();
 709         scolor.planet_data = globals->get_ephem()->getPlanets();
 710         scolor.star_data   = globals->get_ephem()->getStars();
 711
 712         thesky->reposition( sstate, delta_time_sec );
 713         thesky->repaint( scolor );
 714
 715         /*
 716         SG_LOG( SG_GENERAL, SG_BULK,
 717                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 718          << view_pos[1] << " " << view_pos[2] );
 719         SG_LOG( SG_GENERAL, SG_BULK,
 720                 "    zero_elev = " << zero_elev[0] << " "
 721          << zero_elev[1] << " " << zero_elev[2]
 722          << " lon = " << cur_fdm_state->get_Longitude()
 723          << " lat = " << cur_fdm_state->get_Latitude() );
 724         SG_LOG( SG_GENERAL, SG_BULK,
 725                 "    sun_rot = " << l->get_sun_rotation
 726          << " gst = " << SGTime::cur_time_params->getGst() );
 727         SG_LOG( SG_GENERAL, SG_BULK,
 728              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 729           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 730           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 731           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 732         */
 733
 734         //OSGFIXME
 735 //         shadows->setupShadows(
 736 //           current__view->getLongitude_deg(),
 737 //           current__view->getLatitude_deg(),
 738 //           globals->get_time_params()->getGst(),
 739 //           globals->get_ephem()->getSunRightAscension(),
 740 //           globals->get_ephem()->getSunDeclination(),
 741 //           l->get_sun_angle());
 742
 743     }
 744
 745 //     sgEnviro.setLight(l->adj_fog_color());
 746
 747     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 748       - current__view->getSGLocation()->get_cur_elev_m();
 749
 750     float scene_nearplane, scene_farplane;
 751     // XXX Given that the own airplane model is part of the scene
 752     // graph, should this business be ripped out? The near plane is
 753     // ignored by setCameraParameters.
 754     if ( agl > 10.0 ) {
 755         scene_nearplane = 10.0f;
 756         scene_farplane = 120000.0f;
 757     } else {
 758         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 759         scene_farplane = 120000.0f;
 760     }
 761     setCameraParameters(current__view->get_v_fov(),
 762                         current__view->get_aspect_ratio(),
 763                         scene_nearplane, scene_farplane);
 764
 765 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 766 //         current__view->get_world_up(),
 767 //         current__view->getLongitude_deg(),
 768 //         current__view->getLatitude_deg(),
 769 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 770 //         delta_time_sec);
 771
 772     // OSGFIXME
 773 //     sgEnviro.drawLightning();
 774
 775 //        double current_view_origin_airspeed_horiz_kt =
 776 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 777 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 778 //                                * SGD_DEGREES_TO_RADIANS);
 779
 780     // OSGFIXME
 781 //     if( is_internal )
 782 //         shadows->endOfFrame();
 783
 784     // need to call the update visitor once
 785     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 786     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 787                                 current__view->getViewOrientation());
 788     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 789     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 790                              l->scene_diffuse(), l->scene_specular(),
 791                              l->adj_fog_color(),
 792                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 793     mUpdateVisitor->setVisibility(actual_visibility);
 794     viewPartition->setVisibility(actual_visibility);
 795     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 796     bool hotspots = fgGetBool("/sim/panel-hotspots");
 797     osg::Node::NodeMask cullMask = (~simgear::LIGHTS_BITS & ~simgear::PICK_BIT
 798                                     & ~simgear::BACKGROUND_BIT);
 799     cullMask |= simgear::GroundLightManager::instance()
 800         ->getLightNodeMask(mUpdateVisitor.get());
 801     if (hotspots)
 802         cullMask |= simgear::PICK_BIT;
 803     camera->setCullMask(cullMask);
 804     // XXX
 805     for (int i = 0; i < viewer->getNumSlaves(); ++i)
 806         viewer->getSlave(i)._camera->setCullMask(cullMask);
 807 }
 808
 809
 810
 811 // options.cxx needs to see this for toggle_panel()
 812 // Handle new window size or exposure
 813 void
 814 FGRenderer::resize( int width, int height ) {
 815     int view_h;
 816
 817     if ( (!fgGetBool("/sim/virtual-cockpit"))
 818          && fgPanelVisible() && idle_state == 1000 ) {
 819         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 820                              globals->get_current_panel()->getYOffset()) / 768.0);
 821     } else {
 822         view_h = height;
 823     }
 824
 825     static int lastwidth = 0;
 826     static int lastheight = 0;
 827     if (width != lastwidth)
 828         fgSetInt("/sim/startup/xsize", lastwidth = width);
 829     if (height != lastheight)
 830         fgSetInt("/sim/startup/ysize", lastheight = height);
 831
 832     // for all views
 833     FGViewMgr *viewmgr = globals->get_viewmgr();
 834     if (viewmgr) {
 835       for ( int i = 0; i < viewmgr->size(); ++i ) {
 836         viewmgr->get_view(i)->
 837           set_aspect_ratio((float)view_h / (float)width);
 838       }
 839     }
 840 }
 841
 842 void FGRenderer::setCameraParameters(float vfov, float aspectRatio,
 843                                      float zNear, float zFar)
 844 {
 845     zNear = .1;
 846     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 847     viewer->getCamera()->setProjectionMatrixAsPerspective(vfov,
 848                                                           1.0f / aspectRatio,
 849                                                           zNear, zFar);
 850
 851 }
 852 bool
 853 FGRenderer::pick( unsigned x, unsigned y,
 854                   std::vector<SGSceneryPick>& pickList,
 855                   const osgGA::GUIEventAdapter* ea )
 856 {
 857   osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 858   // wipe out the return ...
 859   pickList.resize(0);
 860
 861   if (viewer) {
 862     // just compute intersections in the viewers method ...
 863     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 864     Intersections intersections;
 865     viewer->computeIntersections(ea->getX(), ea->getY(), intersections);
 866
 867     Intersections::iterator hit;
 868     for (hit = intersections.begin(); hit != intersections.end(); ++hit) {
 869       const osg::NodePath& np = hit->nodePath;
 870       osg::NodePath::const_reverse_iterator npi;
 871       for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 872         SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 873         if (!ud)
 874           continue;
 875         for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 876           SGPickCallback* pickCallback = ud->getPickCallback(i);
 877           if (!pickCallback)
 878             continue;
 879           SGSceneryPick sceneryPick;
 880           sceneryPick.info.local = SGVec3d(hit->getLocalIntersectPoint());
 881           sceneryPick.info.wgs84 = SGVec3d(hit->getWorldIntersectPoint());
 882           sceneryPick.callback = pickCallback;
 883           pickList.push_back(sceneryPick);
 884         }
 885       }
 886     }
 887     return !pickList.empty();
 888   } else {                      // we can get called early ...
 889     return false;
 890   }
 891 }
 892
 893 void
 894 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 895 {
 896     mRealRoot->addChild(camera);
 897 }
 898
 899 bool
 900 fgDumpSceneGraphToFile(const char* filename)
 901 {
 902     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 903 }
 904
 905 bool
 906 fgDumpTerrainBranchToFile(const char* filename)
 907 {
 908     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 909                                  filename );
 910 }
 911
 912 // For debugging
 913 bool
 914 fgDumpNodeToFile(osg::Node* node, const char* filename)
 915 {
 916     return osgDB::writeNodeFile(*node, filename);
 917 }
 918 // end of renderer.cxx
 919