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 #ifdef HAVE_WINDOWS_H
  29 #  include <windows.h>
  30 #endif
  31
  32 #include <osg/ref_ptr>
  33 #include <osg/AlphaFunc>
  34 #include <osg/BlendFunc>
  35 #include <osg/Camera>
  36 #include <osg/CullFace>
  37 #include <osg/Depth>
  38 #include <osg/Fog>
  39 #include <osg/Group>
  40 #include <osg/Hint>
  41 #include <osg/Light>
  42 #include <osg/LightModel>
  43 #include <osg/LightSource>
  44 #include <osg/NodeCallback>
  45 #include <osg/Notify>
  46 #include <osg/PolygonMode>
  47 #include <osg/PolygonOffset>
  48 #include <osg/ShadeModel>
  49 #include <osg/Version>
  50 #include <osg/TexEnv>
  51
  52 #include <osgUtil/SceneView>
  53 #include <osgUtil/UpdateVisitor>
  54 #include <osgUtil/IntersectVisitor>
  55 #include <osgUtil/LineSegmentIntersector>
  56
  57 #include <osg/io_utils>
  58 #include <osgDB/WriteFile>
  59 #include <osgDB/ReadFile>
  60 #include <sstream>
  61
  62 #include <simgear/math/SGMath.hxx>
  63 #include <simgear/screen/extensions.hxx>
  64 #include <simgear/scene/material/matlib.hxx>
  65 #include <simgear/scene/model/animation.hxx>
  66 #include <simgear/scene/model/placement.hxx>
  67 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  68 #include <simgear/scene/util/RenderConstants.hxx>
  69 #include <simgear/scene/tgdb/GroundLightManager.hxx>
  70 #include <simgear/scene/tgdb/pt_lights.hxx>
  71 #include <simgear/props/props.hxx>
  72 #include <simgear/timing/sg_time.hxx>
  73 #include <simgear/ephemeris/ephemeris.hxx>
  74 #include <simgear/math/sg_random.h>
  75 #ifdef FG_JPEG_SERVER
  76 #include <simgear/screen/jpgfactory.hxx>
  77 #endif
  78
  79 #include <simgear/environment/visual_enviro.hxx>
  80
  81 #include <Time/light.hxx>
  82 #include <Time/light.hxx>
  83 #include <Aircraft/aircraft.hxx>
  84 #include <Cockpit/panel.hxx>
  85 #include <Cockpit/cockpit.hxx>
  86 #include <Cockpit/hud.hxx>
  87 #include <Model/panelnode.hxx>
  88 #include <Model/modelmgr.hxx>
  89 #include <Model/acmodel.hxx>
  90 #include <Scenery/scenery.hxx>
  91 #include <Scenery/redout.hxx>
  92 #include <Scenery/tilemgr.hxx>
  93 #include <GUI/new_gui.hxx>
  94 #include <Instrumentation/instrument_mgr.hxx>
  95 #include <Instrumentation/HUD/HUD.hxx>
  96 #include <Environment/precipitation_mgr.hxx>
  97
  98 #include <Include/general.hxx>
  99 #include "splash.hxx"
 100 #include "renderer.hxx"
 101 #include "main.hxx"
 102 #include "ViewPartitionNode.hxx"
 103
 104 // XXX Make this go away when OSG 2.2 is released.
 105 #if (FG_OSG_VERSION >= 21004)
 106 #define UPDATE_VISITOR_IN_VIEWER 1
 107 #endif
 108
 109 class FGHintUpdateCallback : public osg::StateAttribute::Callback {
 110 public:
 111   FGHintUpdateCallback(const char* configNode) :
 112     mConfigNode(fgGetNode(configNode, true))
 113   { }
 114   virtual void operator()(osg::StateAttribute* stateAttribute,
 115                           osg::NodeVisitor*)
 116   {
 117     assert(dynamic_cast<osg::Hint*>(stateAttribute));
 118     osg::Hint* hint = static_cast<osg::Hint*>(stateAttribute);
 119
 120     const char* value = mConfigNode->getStringValue();
 121     if (!value)
 122       hint->setMode(GL_DONT_CARE);
 123     else if (0 == strcmp(value, "nicest"))
 124       hint->setMode(GL_NICEST);
 125     else if (0 == strcmp(value, "fastest"))
 126       hint->setMode(GL_FASTEST);
 127     else
 128       hint->setMode(GL_DONT_CARE);
 129   }
 130 private:
 131   SGSharedPtr<SGPropertyNode> mConfigNode;
 132 };
 133
 134
 135 class SGPuDrawable : public osg::Drawable {
 136 public:
 137   SGPuDrawable()
 138   {
 139     // Dynamic stuff, do not store geometry
 140     setUseDisplayList(false);
 141
 142     osg::StateSet* stateSet = getOrCreateStateSet();
 143     stateSet->setRenderBinDetails(1001, "RenderBin");
 144     // speed optimization?
 145     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 146     // We can do translucent menus, so why not. :-)
 147     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 148     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 149     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 150
 151     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 152
 153     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 154     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 155   }
 156   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 157   { drawImplementation(*renderInfo.getState()); }
 158   void drawImplementation(osg::State& state) const
 159   {
 160     if (!fgOSIsMainContext(state.getGraphicsContext()))
 161       return;
 162     state.disableAllVertexArrays();
 163
 164     glPushAttrib(GL_ALL_ATTRIB_BITS);
 165     glPushClientAttrib(~0u);
 166
 167     puDisplay();
 168
 169     glPopClientAttrib();
 170     glPopAttrib();
 171   }
 172
 173   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 174   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 175
 176 private:
 177 };
 178
 179 class SGHUDAndPanelDrawable : public osg::Drawable {
 180 public:
 181   SGHUDAndPanelDrawable()
 182   {
 183     // Dynamic stuff, do not store geometry
 184     setUseDisplayList(false);
 185
 186     osg::StateSet* stateSet = getOrCreateStateSet();
 187     stateSet->setRenderBinDetails(1000, "RenderBin");
 188
 189     // speed optimization?
 190     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 191     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 192     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 193     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 194     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 195
 196     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 197   }
 198   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 199   { drawImplementation(*renderInfo.getState()); }
 200   void drawImplementation(osg::State& state) const
 201   {
 202     if (!fgOSIsMainContext(state.getGraphicsContext()))
 203       return;
 204
 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   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 228   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 229
 230 private:
 231 };
 232
 233 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 234 public:
 235   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 236   {
 237     assert(dynamic_cast<osg::LightSource*>(node));
 238     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 239     osg::Light* light = lightSource->getLight();
 240
 241     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 242     light->setAmbient(l->scene_ambient().osg());
 243     light->setDiffuse(l->scene_diffuse().osg());
 244     light->setSpecular(l->scene_specular().osg());
 245     SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 246     light->setPosition(position.osg());
 247     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 248     light->setDirection(direction.osg());
 249     light->setSpotExponent(0);
 250     light->setSpotCutoff(180);
 251     light->setConstantAttenuation(1);
 252     light->setLinearAttenuation(0);
 253     light->setQuadraticAttenuation(0);
 254
 255     traverse(node, nv);
 256   }
 257 };
 258
 259 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 260 public:
 261   FGWireFrameModeUpdateCallback() :
 262     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 263   { }
 264   virtual void operator()(osg::StateAttribute* stateAttribute,
 265                           osg::NodeVisitor*)
 266   {
 267     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 268     osg::PolygonMode* polygonMode;
 269     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 270
 271     if (mWireframe->getBoolValue())
 272       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 273                            osg::PolygonMode::LINE);
 274     else
 275       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 276                            osg::PolygonMode::FILL);
 277   }
 278 private:
 279   SGSharedPtr<SGPropertyNode> mWireframe;
 280 };
 281
 282 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 283 public:
 284   FGLightModelUpdateCallback() :
 285     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 286   { }
 287   virtual void operator()(osg::StateAttribute* stateAttribute,
 288                           osg::NodeVisitor*)
 289   {
 290     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 291     osg::LightModel* lightModel;
 292     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 293
 294 #if 0
 295     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 296     lightModel->setAmbientIntensity(l->scene_ambient().osg());
 297 #else
 298     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 299 #endif
 300     lightModel->setTwoSided(true);
 301     lightModel->setLocalViewer(false);
 302
 303     if (mHighlights->getBoolValue()) {
 304       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 305     } else {
 306       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 307     }
 308   }
 309 private:
 310   SGSharedPtr<SGPropertyNode> mHighlights;
 311 };
 312
 313 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 314 public:
 315   FGFogEnableUpdateCallback() :
 316     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 317   { }
 318   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 319   {
 320     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 321       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 322     } else {
 323       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 324     }
 325   }
 326 private:
 327   SGSharedPtr<SGPropertyNode> mFogEnabled;
 328 };
 329
 330 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 331 public:
 332   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 333   {
 334     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 335     assert(dynamic_cast<osg::Fog*>(sa));
 336     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 337     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 338     fog->setMode(osg::Fog::EXP2);
 339     fog->setColor(updateVisitor->getFogColor().osg());
 340     fog->setDensity(updateVisitor->getFogExp2Density());
 341   }
 342 };
 343
 344 // update callback for the switch node guarding that splash
 345 class FGScenerySwitchCallback : public osg::NodeCallback {
 346 public:
 347   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 348   {
 349     assert(dynamic_cast<osg::Switch*>(node));
 350     osg::Switch* sw = static_cast<osg::Switch*>(node);
 351
 352     double t = globals->get_sim_time_sec();
 353     bool enabled = 0 < t;
 354     sw->setValue(0, enabled);
 355     if (!enabled)
 356       return;
 357     traverse(node, nv);
 358   }
 359 };
 360
 361 // Sky structures
 362 SGSky *thesky;
 363
 364 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 365 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 366
 367 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 368
 369 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 370
 371 static osg::ref_ptr<ViewPartitionNode> viewPartition = new ViewPartitionNode;
 372
 373 FGRenderer::FGRenderer()
 374 {
 375 #ifdef FG_JPEG_SERVER
 376    jpgRenderFrame = FGRenderer::update;
 377 #endif
 378    manipulator = new FGManipulator;
 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     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 395     mRealRoot->addChild(fgCreateSplashNode());
 396     mFrameStamp = viewer->getFrameStamp();
 397     // Scene doesn't seem to pass the frame stamp to the update
 398     // visitor automatically.
 399     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 400 #ifdef UPDATE_VISITOR_IN_VIEWER
 401     viewer->setUpdateVisitor(mUpdateVisitor.get());
 402 #else
 403     osgViewer::Scene* scene = viewer->getScene();
 404     scene->setUpdateVisitor(mUpdateVisitor.get());
 405 #endif
 406 }
 407
 408 namespace
 409 {
 410 // Create a slave camera that will be used to render a fixed GUI-like
 411 // element.
 412 osg::Camera*
 413 makeSlaveCamera(osg::Camera::RenderOrder renderOrder, int orderNum)
 414 {
 415     using namespace osg;
 416     Camera* camera = new osg::Camera;
 417     GraphicsContext *gc = fgOSGetMainContext();
 418
 419     camera->setRenderOrder(renderOrder, orderNum);
 420     camera->setClearMask(0);
 421     camera->setInheritanceMask(CullSettings::ALL_VARIABLES
 422                                & ~(CullSettings::COMPUTE_NEAR_FAR_MODE
 423                                    | CullSettings::CULLING_MODE));
 424     camera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 425     camera->setCullingMode(osg::CullSettings::NO_CULLING);
 426     camera->setGraphicsContext(gc);
 427     // Establish an initial viewport. This may be altered,
 428     // particularly when drawing a 2d panel.
 429     const GraphicsContext::Traits *traits = gc->getTraits();
 430     camera->setViewport(new Viewport(0, 0, traits->width, traits->height));
 431     camera->setProjectionResizePolicy(Camera::FIXED);
 432     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
 433     camera->setAllowEventFocus(false);
 434     globals->get_renderer()->getViewer()->addSlave(camera, false);
 435     return camera;
 436 }
 437
 438 }
 439
 440 void
 441 FGRenderer::init( void )
 442 {
 443     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 444     osg::initNotifyLevel();
 445
 446     // The number of polygon-offset "units" to place between layers.  In
 447     // principle, one is supposed to be enough.  In practice, I find that
 448     // my hardware/driver requires many more.
 449     osg::PolygonOffset::setUnitsMultiplier(1);
 450     osg::PolygonOffset::setFactorMultiplier(1);
 451
 452     // Go full screen if requested ...
 453     if ( fgGetBool("/sim/startup/fullscreen") )
 454         fgOSFullScreen();
 455
 456     viewer->getCamera()
 457         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 458
 459     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 460
 461     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 462
 463     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 464     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 465
 466     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 467     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 468     stateSet->setAttribute(new osg::BlendFunc);
 469     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 470
 471     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 472
 473     // this will be set below
 474     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 475
 476     osg::Material* material = new osg::Material;
 477     stateSet->setAttribute(material);
 478
 479     stateSet->setTextureAttribute(0, new osg::TexEnv);
 480     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 481
 482     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 483     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 484     stateSet->setAttribute(hint);
 485     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 486     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 487     stateSet->setAttribute(hint);
 488     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 489     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 490     stateSet->setAttribute(hint);
 491     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 492     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 493     stateSet->setAttribute(hint);
 494     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 495     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 496     stateSet->setAttribute(hint);
 497
 498     osg::Group* sceneGroup = new osg::Group;
 499     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 500     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 501
 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
 515     lightSource->addChild(sceneGroup);
 516     lightSource->addChild(thesky->getPreRoot());
 517     mRoot->addChild(lightSource);
 518
 519     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 520     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 521     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 522     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 523     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 524
 525     // enable disable specular highlights.
 526     // is the place where we might plug in an other fragment shader ...
 527     osg::LightModel* lightModel = new osg::LightModel;
 528     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 529     stateSet->setAttribute(lightModel);
 530
 531     // switch to enable wireframe
 532     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 533     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 534     stateSet->setAttributeAndModes(polygonMode);
 535
 536     // scene fog handling
 537     osg::Fog* fog = new osg::Fog;
 538     fog->setUpdateCallback(new FGFogUpdateCallback);
 539     stateSet->setAttributeAndModes(fog);
 540     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 541
 542     // plug in the GUI
 543     osg::Camera* guiCamera = makeSlaveCamera(osg::Camera::POST_RENDER, 100);
 544     guiCamera->setName("GUI");
 545     osg::Geode* geode = new osg::Geode;
 546     geode->addDrawable(new SGPuDrawable);
 547     geode->addDrawable(new SGHUDAndPanelDrawable);
 548     guiCamera->addChild(geode);
 549
 550     osg::Switch* sw = new osg::Switch;
 551     sw->setUpdateCallback(new FGScenerySwitchCallback);
 552     sw->addChild(mRoot.get());
 553     viewPartition->addChild(sw);
 554     viewPartition->addChild(thesky->getCloudRoot());
 555
 556     mRealRoot->addChild(viewPartition.get());
 557     mRealRoot->addChild(FGCreateRedoutNode());
 558     mRealRoot->addChild(guiCamera);
 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     guiInitMouse(width, height);
 833
 834     // for all views
 835     FGViewMgr *viewmgr = globals->get_viewmgr();
 836     if (viewmgr) {
 837       for ( int i = 0; i < viewmgr->size(); ++i ) {
 838         viewmgr->get_view(i)->
 839           set_aspect_ratio((float)view_h / (float)width);
 840       }
 841     }
 842 }
 843
 844 void FGRenderer::setCameraParameters(float vfov, float aspectRatio,
 845                                      float zNear, float zFar)
 846 {
 847     zNear = .1;
 848     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 849     viewer->getCamera()->setProjectionMatrixAsPerspective(vfov,
 850                                                           1.0f / aspectRatio,
 851                                                           zNear, zFar);
 852
 853 }
 854 bool
 855 FGRenderer::pick( unsigned x, unsigned y,
 856                   std::vector<SGSceneryPick>& pickList,
 857                   const osgGA::GUIEventAdapter* ea )
 858 {
 859   osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 860   // wipe out the return ...
 861   pickList.resize(0);
 862
 863   if (viewer) {
 864     // just compute intersections in the viewers method ...
 865     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 866     Intersections intersections;
 867     viewer->computeIntersections(ea->getX(), ea->getY(), intersections);
 868
 869     Intersections::iterator hit;
 870     for (hit = intersections.begin(); hit != intersections.end(); ++hit) {
 871       const osg::NodePath& np = hit->nodePath;
 872       osg::NodePath::const_reverse_iterator npi;
 873       for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 874         SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 875         if (!ud)
 876           continue;
 877         for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 878           SGPickCallback* pickCallback = ud->getPickCallback(i);
 879           if (!pickCallback)
 880             continue;
 881           SGSceneryPick sceneryPick;
 882           sceneryPick.info.local = SGVec3d(hit->getLocalIntersectPoint());
 883           sceneryPick.info.wgs84 = SGVec3d(hit->getWorldIntersectPoint());
 884           sceneryPick.callback = pickCallback;
 885           pickList.push_back(sceneryPick);
 886         }
 887       }
 888     }
 889     return !pickList.empty();
 890   } else {                      // we can get called early ...
 891     return false;
 892   }
 893 }
 894
 895 void
 896 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 897 {
 898     mRealRoot->addChild(camera);
 899 }
 900
 901 bool
 902 fgDumpSceneGraphToFile(const char* filename)
 903 {
 904     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 905 }
 906
 907 bool
 908 fgDumpTerrainBranchToFile(const char* filename)
 909 {
 910     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 911                                  filename );
 912 }
 913
 914 // For debugging
 915 bool
 916 fgDumpNodeToFile(osg::Node* node, const char* filename)
 917 {
 918     return osgDB::writeNodeFile(*node, filename);
 919 }
 920 // end of renderer.cxx
 921