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.setActiveTextureUnit(0);
 163     state.setClientActiveTextureUnit(0);
 164
 165     state.disableAllVertexArrays();
 166
 167     glPushAttrib(GL_ALL_ATTRIB_BITS);
 168     glPushClientAttrib(~0u);
 169
 170     puDisplay();
 171
 172     glPopClientAttrib();
 173     glPopAttrib();
 174   }
 175
 176   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 177   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 178
 179 private:
 180 };
 181
 182 class SGHUDAndPanelDrawable : public osg::Drawable {
 183 public:
 184   SGHUDAndPanelDrawable()
 185   {
 186     // Dynamic stuff, do not store geometry
 187     setUseDisplayList(false);
 188
 189     osg::StateSet* stateSet = getOrCreateStateSet();
 190     stateSet->setRenderBinDetails(1000, "RenderBin");
 191
 192     // speed optimization?
 193     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 194     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 195     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 196     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 197     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 198
 199     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 200   }
 201   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 202   { drawImplementation(*renderInfo.getState()); }
 203   void drawImplementation(osg::State& state) const
 204   {
 205     if (!fgOSIsMainContext(state.getGraphicsContext()))
 206       return;
 207     state.setActiveTextureUnit(0);
 208     state.setClientActiveTextureUnit(0);
 209     state.disableAllVertexArrays();
 210
 211     glPushAttrib(GL_ALL_ATTRIB_BITS);
 212     glPushClientAttrib(~0u);
 213
 214     fgCockpitUpdate(&state);
 215
 216     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 217     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 218     hud->draw(state);
 219
 220     // update the panel subsystem
 221     if ( globals->get_current_panel() != NULL )
 222         globals->get_current_panel()->update(state);
 223     // We don't need a state here - can be safely removed when we can pick
 224     // correctly
 225     fgUpdate3DPanels();
 226
 227     glPopClientAttrib();
 228     glPopAttrib();
 229
 230   }
 231
 232   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 233   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 234
 235 private:
 236 };
 237
 238 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 239 public:
 240   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 241   {
 242     assert(dynamic_cast<osg::LightSource*>(node));
 243     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 244     osg::Light* light = lightSource->getLight();
 245
 246     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 247     light->setAmbient(l->scene_ambient().osg());
 248     light->setDiffuse(l->scene_diffuse().osg());
 249     light->setSpecular(l->scene_specular().osg());
 250     SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 251     light->setPosition(position.osg());
 252     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 253     light->setDirection(direction.osg());
 254     light->setSpotExponent(0);
 255     light->setSpotCutoff(180);
 256     light->setConstantAttenuation(1);
 257     light->setLinearAttenuation(0);
 258     light->setQuadraticAttenuation(0);
 259
 260     traverse(node, nv);
 261   }
 262 };
 263
 264 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 265 public:
 266   FGWireFrameModeUpdateCallback() :
 267     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 268   { }
 269   virtual void operator()(osg::StateAttribute* stateAttribute,
 270                           osg::NodeVisitor*)
 271   {
 272     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 273     osg::PolygonMode* polygonMode;
 274     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 275
 276     if (mWireframe->getBoolValue())
 277       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 278                            osg::PolygonMode::LINE);
 279     else
 280       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 281                            osg::PolygonMode::FILL);
 282   }
 283 private:
 284   SGSharedPtr<SGPropertyNode> mWireframe;
 285 };
 286
 287 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 288 public:
 289   FGLightModelUpdateCallback() :
 290     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 291   { }
 292   virtual void operator()(osg::StateAttribute* stateAttribute,
 293                           osg::NodeVisitor*)
 294   {
 295     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 296     osg::LightModel* lightModel;
 297     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 298
 299 #if 0
 300     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 301     lightModel->setAmbientIntensity(l->scene_ambient().osg());
 302 #else
 303     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 304 #endif
 305     lightModel->setTwoSided(true);
 306     lightModel->setLocalViewer(false);
 307
 308     if (mHighlights->getBoolValue()) {
 309       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 310     } else {
 311       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 312     }
 313   }
 314 private:
 315   SGSharedPtr<SGPropertyNode> mHighlights;
 316 };
 317
 318 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 319 public:
 320   FGFogEnableUpdateCallback() :
 321     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 322   { }
 323   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 324   {
 325     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 326       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 327     } else {
 328       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 329     }
 330   }
 331 private:
 332   SGSharedPtr<SGPropertyNode> mFogEnabled;
 333 };
 334
 335 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 336 public:
 337   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 338   {
 339     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 340     assert(dynamic_cast<osg::Fog*>(sa));
 341     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 342     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 343     fog->setMode(osg::Fog::EXP2);
 344     fog->setColor(updateVisitor->getFogColor().osg());
 345     fog->setDensity(updateVisitor->getFogExp2Density());
 346   }
 347 };
 348
 349 // update callback for the switch node guarding that splash
 350 class FGScenerySwitchCallback : public osg::NodeCallback {
 351 public:
 352   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 353   {
 354     assert(dynamic_cast<osg::Switch*>(node));
 355     osg::Switch* sw = static_cast<osg::Switch*>(node);
 356
 357     double t = globals->get_sim_time_sec();
 358     bool enabled = 0 < t;
 359     sw->setValue(0, enabled);
 360     if (!enabled)
 361       return;
 362     traverse(node, nv);
 363   }
 364 };
 365
 366 // Sky structures
 367 SGSky *thesky;
 368
 369 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 370 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 371
 372 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 373
 374 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 375
 376 static osg::ref_ptr<ViewPartitionNode> viewPartition = new ViewPartitionNode;
 377
 378 FGRenderer::FGRenderer()
 379 {
 380 #ifdef FG_JPEG_SERVER
 381    jpgRenderFrame = FGRenderer::update;
 382 #endif
 383    manipulator = new FGManipulator;
 384 }
 385
 386 FGRenderer::~FGRenderer()
 387 {
 388 #ifdef FG_JPEG_SERVER
 389    jpgRenderFrame = NULL;
 390 #endif
 391 }
 392
 393 // Initialize various GL/view parameters
 394 // XXX This should be called "preinit" or something, as it initializes
 395 // critical parts of the scene graph in addition to the splash screen.
 396 void
 397 FGRenderer::splashinit( void ) {
 398     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 399     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 400     mRealRoot->addChild(fgCreateSplashNode());
 401     mFrameStamp = viewer->getFrameStamp();
 402     // Scene doesn't seem to pass the frame stamp to the update
 403     // visitor automatically.
 404     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 405 #ifdef UPDATE_VISITOR_IN_VIEWER
 406     viewer->setUpdateVisitor(mUpdateVisitor.get());
 407 #else
 408     osgViewer::Scene* scene = viewer->getScene();
 409     scene->setUpdateVisitor(mUpdateVisitor.get());
 410 #endif
 411 }
 412
 413 namespace
 414 {
 415 // Create a slave camera that will be used to render a fixed GUI-like
 416 // element.
 417 osg::Camera*
 418 makeSlaveCamera(osg::Camera::RenderOrder renderOrder, int orderNum)
 419 {
 420     using namespace osg;
 421     Camera* camera = new osg::Camera;
 422     GraphicsContext *gc = fgOSGetMainContext();
 423
 424     camera->setRenderOrder(renderOrder, orderNum);
 425     camera->setClearMask(0);
 426     camera->setInheritanceMask(CullSettings::ALL_VARIABLES
 427                                & ~(CullSettings::COMPUTE_NEAR_FAR_MODE
 428                                    | CullSettings::CULLING_MODE));
 429     camera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 430     camera->setCullingMode(osg::CullSettings::NO_CULLING);
 431     camera->setGraphicsContext(gc);
 432     // Establish an initial viewport. This may be altered,
 433     // particularly when drawing a 2d panel.
 434     const GraphicsContext::Traits *traits = gc->getTraits();
 435     camera->setViewport(new Viewport(0, 0, traits->width, traits->height));
 436     camera->setProjectionResizePolicy(Camera::FIXED);
 437     camera->setReferenceFrame(Transform::ABSOLUTE_RF);
 438     camera->setAllowEventFocus(false);
 439     globals->get_renderer()->getViewer()->addSlave(camera, false);
 440     return camera;
 441 }
 442
 443 }
 444
 445 void
 446 FGRenderer::init( void )
 447 {
 448     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 449     osg::initNotifyLevel();
 450
 451     // The number of polygon-offset "units" to place between layers.  In
 452     // principle, one is supposed to be enough.  In practice, I find that
 453     // my hardware/driver requires many more.
 454     osg::PolygonOffset::setUnitsMultiplier(1);
 455     osg::PolygonOffset::setFactorMultiplier(1);
 456
 457     // Go full screen if requested ...
 458     if ( fgGetBool("/sim/startup/fullscreen") )
 459         fgOSFullScreen();
 460
 461     viewer->getCamera()
 462         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 463
 464     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 465
 466     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 467
 468     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 469     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 470
 471     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 472     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 473     stateSet->setAttribute(new osg::BlendFunc);
 474     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 475
 476     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 477
 478     // this will be set below
 479     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 480
 481     osg::Material* material = new osg::Material;
 482     stateSet->setAttribute(material);
 483
 484     stateSet->setTextureAttribute(0, new osg::TexEnv);
 485     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 486
 487     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 488     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 489     stateSet->setAttribute(hint);
 490     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 491     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 492     stateSet->setAttribute(hint);
 493     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 494     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 495     stateSet->setAttribute(hint);
 496     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 497     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 498     stateSet->setAttribute(hint);
 499     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 500     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 501     stateSet->setAttribute(hint);
 502
 503     osg::Group* sceneGroup = new osg::Group;
 504     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 505     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 506
 507     //sceneGroup->addChild(thesky->getCloudRoot());
 508
 509     stateSet = sceneGroup->getOrCreateStateSet();
 510     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 511     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 512
 513     // need to update the light on every frame
 514     osg::LightSource* lightSource = new osg::LightSource;
 515     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 516     // relative because of CameraView being just a clever transform node
 517     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 518     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 519
 520     lightSource->addChild(sceneGroup);
 521     lightSource->addChild(thesky->getPreRoot());
 522     mRoot->addChild(lightSource);
 523
 524     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 525     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 526     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 527     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 528     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 529
 530     // enable disable specular highlights.
 531     // is the place where we might plug in an other fragment shader ...
 532     osg::LightModel* lightModel = new osg::LightModel;
 533     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 534     stateSet->setAttribute(lightModel);
 535
 536     // switch to enable wireframe
 537     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 538     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 539     stateSet->setAttributeAndModes(polygonMode);
 540
 541     // scene fog handling
 542     osg::Fog* fog = new osg::Fog;
 543     fog->setUpdateCallback(new FGFogUpdateCallback);
 544     stateSet->setAttributeAndModes(fog);
 545     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 546
 547     // plug in the GUI
 548     osg::Camera* guiCamera = makeSlaveCamera(osg::Camera::POST_RENDER, 100);
 549     guiCamera->setName("GUI");
 550     osg::Geode* geode = new osg::Geode;
 551     geode->addDrawable(new SGPuDrawable);
 552     geode->addDrawable(new SGHUDAndPanelDrawable);
 553     guiCamera->addChild(geode);
 554
 555     osg::Switch* sw = new osg::Switch;
 556     sw->setUpdateCallback(new FGScenerySwitchCallback);
 557     sw->addChild(mRoot.get());
 558     viewPartition->addChild(sw);
 559     viewPartition->addChild(thesky->getCloudRoot());
 560
 561     mRealRoot->addChild(viewPartition.get());
 562     mRealRoot->addChild(FGCreateRedoutNode());
 563 }
 564
 565
 566 // Update all Visuals (redraws anything graphics related)
 567 void
 568 FGRenderer::update( bool refresh_camera_settings ) {
 569     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 570                           || fgGetBool("sim/sceneryloaded-override");
 571     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 572     if ( idle_state < 1000 || !scenery_loaded ) {
 573         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 574
 575         // Keep resetting sim time while the sim is initializing
 576         // the splash screen is now in the scenegraph
 577         globals->set_sim_time_sec( 0.0 );
 578         return;
 579     }
 580
 581     // Fade out the splash screen over the first three seconds.
 582     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 583     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 584
 585     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 586     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 587     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 588     bool distance_attenuation
 589         = fgGetBool("/sim/rendering/distance-attenuation");
 590     // OSGFIXME
 591     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 592                                   distance_attenuation );
 593
 594     static const SGPropertyNode *groundlevel_nearplane
 595         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 596
 597     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 598
 599     // update fog params
 600     double actual_visibility;
 601     if (fgGetBool("/environment/clouds/status")) {
 602         actual_visibility = thesky->get_visibility();
 603     } else {
 604         actual_visibility = fgGetDouble("/environment/visibility-m");
 605     }
 606
 607     // idle_state is now 1000 meaning we've finished all our
 608     // initializations and are running the main loop, so this will
 609     // now work without seg faulting the system.
 610
 611     FGViewer *current__view = globals->get_current_view();
 612     // Force update of center dependent values ...
 613     current__view->set_dirty();
 614
 615     if ( refresh_camera_settings ) {
 616         // update view port
 617         resize( fgGetInt("/sim/startup/xsize"),
 618                 fgGetInt("/sim/startup/ysize") );
 619
 620         SGVec3d position = current__view->getViewPosition();
 621         SGQuatd attitude = current__view->getViewOrientation();
 622         SGVec3d osgPosition = attitude.transform(-position);
 623
 624         FGManipulator *manipulator = globals->get_renderer()->getManipulator();
 625         manipulator->setPosition(position.osg());
 626         manipulator->setAttitude(attitude.osg());
 627     }
 628     osg::Camera *camera = viewer->getCamera();
 629
 630     if ( skyblend ) {
 631
 632         if ( fgGetBool("/sim/rendering/textures") ) {
 633             SGVec4f clearColor(l->adj_fog_color());
 634             camera->setClearColor(clearColor.osg());
 635         }
 636     } else {
 637         SGVec4f clearColor(l->sky_color());
 638         camera->setClearColor(clearColor.osg());
 639     }
 640
 641     // update fog params if visibility has changed
 642     double visibility_meters = fgGetDouble("/environment/visibility-m");
 643     thesky->set_visibility(visibility_meters);
 644
 645     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 646                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 647                         / (double)fgGetInt("/sim/model-hz") );
 648
 649     // update the sky dome
 650     if ( skyblend ) {
 651
 652         // The sun and moon distances are scaled down versions
 653         // of the actual distance to get both the moon and the sun
 654         // within the range of the far clip plane.
 655         // Moon distance:    384,467 kilometers
 656         // Sun distance: 150,000,000 kilometers
 657
 658         double sun_horiz_eff, moon_horiz_eff;
 659         if (fgGetBool("/sim/rendering/horizon-effect")) {
 660            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 661            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 662         } else {
 663            sun_horiz_eff = moon_horiz_eff = 1.0;
 664         }
 665
 666         static SGSkyState sstate;
 667
 668         sstate.view_pos  = toVec3f(current__view->get_view_pos());
 669         sstate.zero_elev = toVec3f(current__view->get_zero_elev());
 670         sstate.view_up   = current__view->get_world_up();
 671         sstate.lon       = current__view->getLongitude_deg()
 672                             * SGD_DEGREES_TO_RADIANS;
 673         sstate.lat       = current__view->getLatitude_deg()
 674                             * SGD_DEGREES_TO_RADIANS;
 675         sstate.alt       = current__view->getAltitudeASL_ft()
 676                             * SG_FEET_TO_METER;
 677         sstate.spin      = l->get_sun_rotation();
 678         sstate.gst       = globals->get_time_params()->getGst();
 679         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 680         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 681         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 682         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 683         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 684         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 685         sstate.sun_angle = l->get_sun_angle();
 686
 687
 688         /*
 689          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 690          << l->sky_color()[0] << " "
 691          << l->sky_color()[1] << " "
 692          << l->sky_color()[2] << " "
 693          << l->sky_color()[3] );
 694         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 695          << l->fog_color()[0] << " "
 696          << l->fog_color()[1] << " "
 697          << l->fog_color()[2] << " "
 698          << l->fog_color()[3] );
 699         SG_LOG( SG_GENERAL, SG_BULK,
 700                 "    sun_angle = " << l->sun_angle
 701          << "    moon_angle = " << l->moon_angle );
 702         */
 703
 704         static SGSkyColor scolor;
 705
 706         scolor.sky_color   = SGVec3f(l->sky_color().data());
 707         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 708         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 709         scolor.sun_angle   = l->get_sun_angle();
 710         scolor.moon_angle  = l->get_moon_angle();
 711         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 712         scolor.nstars      = globals->get_ephem()->getNumStars();
 713         scolor.planet_data = globals->get_ephem()->getPlanets();
 714         scolor.star_data   = globals->get_ephem()->getStars();
 715
 716         thesky->reposition( sstate, delta_time_sec );
 717         thesky->repaint( scolor );
 718
 719         /*
 720         SG_LOG( SG_GENERAL, SG_BULK,
 721                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 722          << view_pos[1] << " " << view_pos[2] );
 723         SG_LOG( SG_GENERAL, SG_BULK,
 724                 "    zero_elev = " << zero_elev[0] << " "
 725          << zero_elev[1] << " " << zero_elev[2]
 726          << " lon = " << cur_fdm_state->get_Longitude()
 727          << " lat = " << cur_fdm_state->get_Latitude() );
 728         SG_LOG( SG_GENERAL, SG_BULK,
 729                 "    sun_rot = " << l->get_sun_rotation
 730          << " gst = " << SGTime::cur_time_params->getGst() );
 731         SG_LOG( SG_GENERAL, SG_BULK,
 732              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 733           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 734           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 735           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 736         */
 737
 738         //OSGFIXME
 739 //         shadows->setupShadows(
 740 //           current__view->getLongitude_deg(),
 741 //           current__view->getLatitude_deg(),
 742 //           globals->get_time_params()->getGst(),
 743 //           globals->get_ephem()->getSunRightAscension(),
 744 //           globals->get_ephem()->getSunDeclination(),
 745 //           l->get_sun_angle());
 746
 747     }
 748
 749 //     sgEnviro.setLight(l->adj_fog_color());
 750
 751     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 752       - current__view->getSGLocation()->get_cur_elev_m();
 753
 754     float scene_nearplane, scene_farplane;
 755     // XXX Given that the own airplane model is part of the scene
 756     // graph, should this business be ripped out? The near plane is
 757     // ignored by setCameraParameters.
 758     if ( agl > 10.0 ) {
 759         scene_nearplane = 10.0f;
 760         scene_farplane = 120000.0f;
 761     } else {
 762         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 763         scene_farplane = 120000.0f;
 764     }
 765     setCameraParameters(current__view->get_v_fov(),
 766                         current__view->get_aspect_ratio(),
 767                         scene_nearplane, scene_farplane);
 768
 769 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 770 //         current__view->get_world_up(),
 771 //         current__view->getLongitude_deg(),
 772 //         current__view->getLatitude_deg(),
 773 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 774 //         delta_time_sec);
 775
 776     // OSGFIXME
 777 //     sgEnviro.drawLightning();
 778
 779 //        double current_view_origin_airspeed_horiz_kt =
 780 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 781 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 782 //                                * SGD_DEGREES_TO_RADIANS);
 783
 784     // OSGFIXME
 785 //     if( is_internal )
 786 //         shadows->endOfFrame();
 787
 788     // need to call the update visitor once
 789     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 790     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 791                                 current__view->getViewOrientation());
 792     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 793     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 794                              l->scene_diffuse(), l->scene_specular(),
 795                              l->adj_fog_color(),
 796                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 797     mUpdateVisitor->setVisibility(actual_visibility);
 798     viewPartition->setVisibility(actual_visibility);
 799     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 800     bool hotspots = fgGetBool("/sim/panel-hotspots");
 801     osg::Node::NodeMask cullMask = (~simgear::LIGHTS_BITS & ~simgear::PICK_BIT
 802                                     & ~simgear::BACKGROUND_BIT);
 803     cullMask |= simgear::GroundLightManager::instance()
 804         ->getLightNodeMask(mUpdateVisitor.get());
 805     if (hotspots)
 806         cullMask |= simgear::PICK_BIT;
 807     camera->setCullMask(cullMask);
 808     // XXX
 809     for (int i = 0; i < viewer->getNumSlaves(); ++i)
 810         viewer->getSlave(i)._camera->setCullMask(cullMask);
 811 }
 812
 813
 814
 815 // options.cxx needs to see this for toggle_panel()
 816 // Handle new window size or exposure
 817 void
 818 FGRenderer::resize( int width, int height ) {
 819     int view_h;
 820
 821     if ( (!fgGetBool("/sim/virtual-cockpit"))
 822          && fgPanelVisible() && idle_state == 1000 ) {
 823         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 824                              globals->get_current_panel()->getYOffset()) / 768.0);
 825     } else {
 826         view_h = height;
 827     }
 828
 829     static int lastwidth = 0;
 830     static int lastheight = 0;
 831     if (width != lastwidth)
 832         fgSetInt("/sim/startup/xsize", lastwidth = width);
 833     if (height != lastheight)
 834         fgSetInt("/sim/startup/ysize", lastheight = height);
 835
 836     guiInitMouse(width, height);
 837
 838     // for all views
 839     FGViewMgr *viewmgr = globals->get_viewmgr();
 840     if (viewmgr) {
 841       for ( int i = 0; i < viewmgr->size(); ++i ) {
 842         viewmgr->get_view(i)->
 843           set_aspect_ratio((float)view_h / (float)width);
 844       }
 845     }
 846 }
 847
 848 void FGRenderer::setCameraParameters(float vfov, float aspectRatio,
 849                                      float zNear, float zFar)
 850 {
 851     zNear = .1;
 852     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 853     viewer->getCamera()->setProjectionMatrixAsPerspective(vfov,
 854                                                           1.0f / aspectRatio,
 855                                                           zNear, zFar);
 856
 857 }
 858 bool
 859 FGRenderer::pick( unsigned x, unsigned y,
 860                   std::vector<SGSceneryPick>& pickList,
 861                   const osgGA::GUIEventAdapter* ea )
 862 {
 863   osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 864   // wipe out the return ...
 865   pickList.resize(0);
 866
 867   if (viewer) {
 868     // just compute intersections in the viewers method ...
 869     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 870     Intersections intersections;
 871     viewer->computeIntersections(ea->getX(), ea->getY(), intersections);
 872
 873     Intersections::iterator hit;
 874     for (hit = intersections.begin(); hit != intersections.end(); ++hit) {
 875       const osg::NodePath& np = hit->nodePath;
 876       osg::NodePath::const_reverse_iterator npi;
 877       for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 878         SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 879         if (!ud)
 880           continue;
 881         for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 882           SGPickCallback* pickCallback = ud->getPickCallback(i);
 883           if (!pickCallback)
 884             continue;
 885           SGSceneryPick sceneryPick;
 886           sceneryPick.info.local = SGVec3d(hit->getLocalIntersectPoint());
 887           sceneryPick.info.wgs84 = SGVec3d(hit->getWorldIntersectPoint());
 888           sceneryPick.callback = pickCallback;
 889           pickList.push_back(sceneryPick);
 890         }
 891       }
 892     }
 893     return !pickList.empty();
 894   } else {                      // we can get called early ...
 895     return false;
 896   }
 897 }
 898
 899 void
 900 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 901 {
 902     mRealRoot->addChild(camera);
 903 }
 904
 905 bool
 906 fgDumpSceneGraphToFile(const char* filename)
 907 {
 908     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 909 }
 910
 911 bool
 912 fgDumpTerrainBranchToFile(const char* filename)
 913 {
 914     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 915                                  filename );
 916 }
 917
 918 // For debugging
 919 bool
 920 fgDumpNodeToFile(osg::Node* node, const char* filename)
 921 {
 922     return osgDB::writeNodeFile(*node, filename);
 923 }
 924 // end of renderer.cxx
 925