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 #ifdef HAVE_WINDOWS_H
  27 #  include <windows.h>
  28 #endif
  29
  30 #include <simgear/compiler.h>
  31
  32 #include <algorithm>
  33 #include <iostream>
  34 #include <map>
  35 #include <vector>
  36 #include <typeinfo>
  37
  38 #include <osg/ref_ptr>
  39 #include <osg/AlphaFunc>
  40 #include <osg/BlendFunc>
  41 #include <osg/Camera>
  42 #include <osg/CullFace>
  43 #include <osg/CullStack>
  44 #include <osg/Depth>
  45 #include <osg/Fog>
  46 #include <osg/Group>
  47 #include <osg/Hint>
  48 #include <osg/Light>
  49 #include <osg/LightModel>
  50 #include <osg/LightSource>
  51 #include <osg/Material>
  52 #include <osg/Math>
  53 #include <osg/NodeCallback>
  54 #include <osg/Notify>
  55 #include <osg/PolygonMode>
  56 #include <osg/PolygonOffset>
  57 #include <osg/Program>
  58 #include <osg/Version>
  59 #include <osg/TexEnv>
  60
  61 #include <osgUtil/LineSegmentIntersector>
  62
  63 #include <osg/io_utils>
  64 #include <osgDB/WriteFile>
  65
  66 #include <simgear/math/SGMath.hxx>
  67 #include <simgear/scene/material/matlib.hxx>
  68 #include <simgear/scene/model/animation.hxx>
  69 #include <simgear/scene/model/placement.hxx>
  70 #include <simgear/scene/sky/sky.hxx>
  71 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  72 #include <simgear/scene/util/RenderConstants.hxx>
  73 #include <simgear/scene/util/SGSceneUserData.hxx>
  74 #include <simgear/scene/tgdb/GroundLightManager.hxx>
  75 #include <simgear/scene/tgdb/pt_lights.hxx>
  76 #include <simgear/structure/OSGUtils.hxx>
  77 #include <simgear/props/props.hxx>
  78 #include <simgear/timing/sg_time.hxx>
  79 #include <simgear/ephemeris/ephemeris.hxx>
  80 #include <simgear/math/sg_random.h>
  81 #ifdef FG_JPEG_SERVER
  82 #include <simgear/screen/jpgfactory.hxx>
  83 #endif
  84
  85 #include <Time/light.hxx>
  86 #include <Time/light.hxx>
  87 #include <Cockpit/panel.hxx>
  88 #include <Model/panelnode.hxx>
  89 #include <Model/modelmgr.hxx>
  90 #include <Model/acmodel.hxx>
  91 #include <Scenery/scenery.hxx>
  92 #include <Scenery/redout.hxx>
  93 #include <GUI/new_gui.hxx>
  94 #include <Instrumentation/HUD/HUD.hxx>
  95 #include <Environment/precipitation_mgr.hxx>
  96
  97 #include "splash.hxx"
  98 #include "renderer.hxx"
  99 #include "main.hxx"
 100 #include "CameraGroup.hxx"
 101 #include "FGEventHandler.hxx"
 102 #include <Main/viewer.hxx>
 103 #include <Main/viewmgr.hxx>
 104
 105 using namespace osg;
 106 using namespace simgear;
 107 using namespace flightgear;
 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     setDataVariance(Object::DYNAMIC);
 142
 143     osg::StateSet* stateSet = getOrCreateStateSet();
 144     stateSet->setRenderBinDetails(1001, "RenderBin");
 145     // speed optimization?
 146     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 147     // We can do translucent menus, so why not. :-)
 148     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 149     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 150     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 151
 152     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 153
 154     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 155     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 156   }
 157   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 158   { drawImplementation(*renderInfo.getState()); }
 159   void drawImplementation(osg::State& state) const
 160   {
 161     state.setActiveTextureUnit(0);
 162     state.setClientActiveTextureUnit(0);
 163
 164     state.disableAllVertexArrays();
 165
 166     glPushAttrib(GL_ALL_ATTRIB_BITS);
 167     glPushClientAttrib(~0u);
 168
 169     puDisplay();
 170
 171     glPopClientAttrib();
 172     glPopAttrib();
 173   }
 174
 175   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 176   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 177
 178 private:
 179 };
 180
 181 class SGHUDAndPanelDrawable : public osg::Drawable {
 182 public:
 183   SGHUDAndPanelDrawable()
 184   {
 185     // Dynamic stuff, do not store geometry
 186     setUseDisplayList(false);
 187     setDataVariance(Object::DYNAMIC);
 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     state.setActiveTextureUnit(0);
 206     state.setClientActiveTextureUnit(0);
 207     state.disableAllVertexArrays();
 208
 209     glPushAttrib(GL_ALL_ATTRIB_BITS);
 210     glPushClientAttrib(~0u);
 211
 212     HUD *hud = static_cast<HUD*>(globals->get_subsystem("hud"));
 213     hud->draw(state);
 214
 215     // update the panel subsystem
 216     if ( globals->get_current_panel() != NULL )
 217         globals->get_current_panel()->update(state);
 218     // We don't need a state here - can be safely removed when we can pick
 219     // correctly
 220     fgUpdate3DPanels();
 221
 222     glPopClientAttrib();
 223     glPopAttrib();
 224
 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
 236   /**
 237    * @param isSun true if the light is the actual sun i.e., for
 238    * illuminating the moon.
 239    */
 240   FGLightSourceUpdateCallback(bool isSun = false) : _isSun(isSun) {}
 241   FGLightSourceUpdateCallback(const FGLightSourceUpdateCallback& nc,
 242                               const CopyOp& op)
 243     : NodeCallback(nc, op), _isSun(nc._isSun)
 244   {}
 245   META_Object(flightgear,FGLightSourceUpdateCallback);
 246
 247   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 248   {
 249     assert(dynamic_cast<osg::LightSource*>(node));
 250     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 251     osg::Light* light = lightSource->getLight();
 252
 253     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 254     if (_isSun) {
 255       light->setAmbient(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 256       light->setDiffuse(Vec4(1.0f, 1.0f, 1.0f, 1.0f));
 257       light->setSpecular(Vec4(0.0f, 0.0f, 0.0f, 0.0f));
 258     } else {
 259       light->setAmbient(toOsg(l->scene_ambient()));
 260       light->setDiffuse(toOsg(l->scene_diffuse()));
 261       light->setSpecular(toOsg(l->scene_specular()));
 262     }
 263     osg::Vec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 264     light->setPosition(position);
 265
 266     traverse(node, nv);
 267   }
 268 private:
 269   const bool _isSun;
 270 };
 271
 272 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 273 public:
 274   FGWireFrameModeUpdateCallback() :
 275     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 276   { }
 277   virtual void operator()(osg::StateAttribute* stateAttribute,
 278                           osg::NodeVisitor*)
 279   {
 280     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 281     osg::PolygonMode* polygonMode;
 282     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 283
 284     if (mWireframe->getBoolValue())
 285       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 286                            osg::PolygonMode::LINE);
 287     else
 288       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 289                            osg::PolygonMode::FILL);
 290   }
 291 private:
 292   SGSharedPtr<SGPropertyNode> mWireframe;
 293 };
 294
 295 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 296 public:
 297   FGLightModelUpdateCallback() :
 298     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 299   { }
 300   virtual void operator()(osg::StateAttribute* stateAttribute,
 301                           osg::NodeVisitor*)
 302   {
 303     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 304     osg::LightModel* lightModel;
 305     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 306
 307 #if 0
 308     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 309     lightModel->setAmbientIntensity(toOsg(l->scene_ambient());
 310 #else
 311     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 312 #endif
 313     lightModel->setTwoSided(true);
 314     lightModel->setLocalViewer(false);
 315
 316     if (mHighlights->getBoolValue()) {
 317       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 318     } else {
 319       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 320     }
 321   }
 322 private:
 323   SGSharedPtr<SGPropertyNode> mHighlights;
 324 };
 325
 326 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 327 public:
 328   FGFogEnableUpdateCallback() :
 329     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 330   { }
 331   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 332   {
 333     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 334       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 335     } else {
 336       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 337     }
 338   }
 339 private:
 340   SGSharedPtr<SGPropertyNode> mFogEnabled;
 341 };
 342
 343 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 344 public:
 345   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 346   {
 347     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 348     assert(dynamic_cast<osg::Fog*>(sa));
 349     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 350     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 351     fog->setMode(osg::Fog::EXP2);
 352     fog->setColor(toOsg(updateVisitor->getFogColor()));
 353     fog->setDensity(updateVisitor->getFogExp2Density());
 354   }
 355 };
 356
 357 // update callback for the switch node guarding that splash
 358 class FGScenerySwitchCallback : public osg::NodeCallback {
 359 public:
 360   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 361   {
 362     assert(dynamic_cast<osg::Switch*>(node));
 363     osg::Switch* sw = static_cast<osg::Switch*>(node);
 364
 365     double t = globals->get_sim_time_sec();
 366     bool enabled = 0 < t;
 367     sw->setValue(0, enabled);
 368     if (!enabled)
 369       return;
 370     traverse(node, nv);
 371   }
 372 };
 373
 374 // Sky structures
 375 SGSky *thesky;
 376
 377 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 378 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 379
 380 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 381
 382 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 383
 384 FGRenderer::FGRenderer()
 385 {
 386 #ifdef FG_JPEG_SERVER
 387    jpgRenderFrame = FGRenderer::update;
 388 #endif
 389    eventHandler = new FGEventHandler;
 390 }
 391
 392 FGRenderer::~FGRenderer()
 393 {
 394 #ifdef FG_JPEG_SERVER
 395    jpgRenderFrame = NULL;
 396 #endif
 397 }
 398
 399 // Initialize various GL/view parameters
 400 // XXX This should be called "preinit" or something, as it initializes
 401 // critical parts of the scene graph in addition to the splash screen.
 402 void
 403 FGRenderer::splashinit( void ) {
 404     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 405     mRealRoot = dynamic_cast<osg::Group*>(viewer->getSceneData());
 406     mRealRoot->addChild(fgCreateSplashNode());
 407     mFrameStamp = viewer->getFrameStamp();
 408     // Scene doesn't seem to pass the frame stamp to the update
 409     // visitor automatically.
 410     mUpdateVisitor->setFrameStamp(mFrameStamp.get());
 411     viewer->setUpdateVisitor(mUpdateVisitor.get());
 412 }
 413
 414 void
 415 FGRenderer::init( void )
 416 {
 417     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 418     osg::initNotifyLevel();
 419
 420     // The number of polygon-offset "units" to place between layers.  In
 421     // principle, one is supposed to be enough.  In practice, I find that
 422     // my hardware/driver requires many more.
 423     osg::PolygonOffset::setUnitsMultiplier(1);
 424     osg::PolygonOffset::setFactorMultiplier(1);
 425
 426     // Go full screen if requested ...
 427     if ( fgGetBool("/sim/startup/fullscreen") )
 428         fgOSFullScreen();
 429
 430     viewer->getCamera()
 431         ->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 432
 433     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 434
 435     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 436
 437     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 438     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 439
 440     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 441     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 442     stateSet->setAttribute(new osg::BlendFunc);
 443     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 444
 445     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 446
 447     // this will be set below
 448     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 449
 450     osg::Material* material = new osg::Material;
 451     stateSet->setAttribute(material);
 452
 453     stateSet->setTextureAttribute(0, new osg::TexEnv);
 454     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 455
 456     osg::Hint* hint = new osg::Hint(GL_FOG_HINT, GL_DONT_CARE);
 457     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/fog"));
 458     stateSet->setAttribute(hint);
 459     hint = new osg::Hint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 460     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/polygon-smooth"));
 461     stateSet->setAttribute(hint);
 462     hint = new osg::Hint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 463     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/line-smooth"));
 464     stateSet->setAttribute(hint);
 465     hint = new osg::Hint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 466     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/point-smooth"));
 467     stateSet->setAttribute(hint);
 468     hint = new osg::Hint(GL_PERSPECTIVE_CORRECTION_HINT, GL_DONT_CARE);
 469     hint->setUpdateCallback(new FGHintUpdateCallback("/sim/rendering/perspective-correction"));
 470     stateSet->setAttribute(hint);
 471
 472     osg::Group* sceneGroup = new osg::Group;
 473     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 474     sceneGroup->setNodeMask(~simgear::BACKGROUND_BIT);
 475
 476     //sceneGroup->addChild(thesky->getCloudRoot());
 477
 478     stateSet = sceneGroup->getOrCreateStateSet();
 479     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 480
 481     // need to update the light on every frame
 482     // OSG LightSource objects are rather confusing. OSG only supports
 483     // the 10 lights specified by OpenGL itself; if more than one
 484     // LightSource in the scene graph have the same light number, it's
 485     // indeterminate which values will be used to render geometry that
 486     // has that light number enabled. Also, adding children to a
 487     // LightSource is just a shortcut for setting up a state set that
 488     // has the corresponding OpenGL light enabled: a LightSource will
 489     // affect geometry anywhere in the scene graph that has its light
 490     // number enabled in a state set.
 491     LightSource* lightSource = new LightSource;
 492     lightSource->getLight()->setDataVariance(Object::DYNAMIC);
 493     // relative because of CameraView being just a clever transform node
 494     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 495     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 496     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 497     mRealRoot->addChild(lightSource);
 498     // we need a white diffuse light for the phase of the moon
 499     osg::LightSource* sunLight = new osg::LightSource;
 500     sunLight->getLight()->setDataVariance(Object::DYNAMIC);
 501     sunLight->getLight()->setLightNum(1);
 502     sunLight->setUpdateCallback(new FGLightSourceUpdateCallback(true));
 503     sunLight->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 504     sunLight->setLocalStateSetModes(osg::StateAttribute::ON);
 505     // Hang a StateSet above the sky subgraph in order to turn off
 506     // light 0
 507     Group* skyGroup = new Group;
 508     StateSet* skySS = skyGroup->getOrCreateStateSet();
 509     skySS->setMode(GL_LIGHT0, StateAttribute::OFF);
 510     skyGroup->addChild(thesky->getPreRoot());
 511     sunLight->addChild(skyGroup);
 512     mRoot->addChild(sceneGroup);
 513     mRoot->addChild(sunLight);
 514     // Clouds are added to the scene graph later
 515     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 516     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 517     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 518     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 519
 520     // enable disable specular highlights.
 521     // is the place where we might plug in an other fragment shader ...
 522     osg::LightModel* lightModel = new osg::LightModel;
 523     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 524     stateSet->setAttribute(lightModel);
 525
 526     // switch to enable wireframe
 527     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 528     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 529     stateSet->setAttributeAndModes(polygonMode);
 530
 531     // scene fog handling
 532     osg::Fog* fog = new osg::Fog;
 533     fog->setUpdateCallback(new FGFogUpdateCallback);
 534     stateSet->setAttributeAndModes(fog);
 535     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 536
 537     // plug in the GUI
 538     osg::Camera* guiCamera = getGUICamera(CameraGroup::getDefault());
 539     if (guiCamera) {
 540         osg::Geode* geode = new osg::Geode;
 541         geode->addDrawable(new SGPuDrawable);
 542         geode->addDrawable(new SGHUDAndPanelDrawable);
 543         guiCamera->addChild(geode);
 544     }
 545     osg::Switch* sw = new osg::Switch;
 546     sw->setUpdateCallback(new FGScenerySwitchCallback);
 547     sw->addChild(mRoot.get());
 548     mRealRoot->addChild(sw);
 549     // The clouds are attached directly to the scene graph root
 550     // because, in theory, they don't want the same default state set
 551     // as the rest of the scene. This may not be true in practice.
 552     mRealRoot->addChild(thesky->getCloudRoot());
 553     mRealRoot->addChild(FGCreateRedoutNode());
 554     // Attach empty program to the scene root so that shader programs
 555     // don't leak into state sets (effects) that shouldn't have one.
 556     stateSet = mRealRoot->getOrCreateStateSet();
 557     stateSet->setAttributeAndModes(new osg::Program, osg::StateAttribute::ON);
 558 }
 559
 560
 561 // Update all Visuals (redraws anything graphics related)
 562 void
 563 FGRenderer::update( bool refresh_camera_settings ) {
 564     bool scenery_loaded = fgGetBool("sim/sceneryloaded", false)
 565                           || fgGetBool("sim/sceneryloaded-override");
 566     osgViewer::Viewer* viewer = globals->get_renderer()->getViewer();
 567     if (!scenery_loaded) {
 568       fgSetDouble("/sim/startup/splash-alpha", 1.0);
 569       return;
 570     }
 571
 572     // Fade out the splash screen over the first three seconds.
 573     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 574     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 575
 576     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 577     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 578     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 579     bool distance_attenuation
 580         = fgGetBool("/sim/rendering/distance-attenuation");
 581     // OSGFIXME
 582     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 583                                   distance_attenuation );
 584
 585     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 586
 587     // update fog params
 588     double actual_visibility;
 589     if (fgGetBool("/environment/clouds/status")) {
 590         actual_visibility = thesky->get_visibility();
 591     } else {
 592         actual_visibility = fgGetDouble("/environment/visibility-m");
 593     }
 594
 595     // idle_state is now 1000 meaning we've finished all our
 596     // initializations and are running the main loop, so this will
 597     // now work without seg faulting the system.
 598
 599     FGViewer *current__view = globals->get_current_view();
 600     // Force update of center dependent values ...
 601     current__view->set_dirty();
 602
 603     if ( refresh_camera_settings ) {
 604         // update view port
 605         resize( fgGetInt("/sim/startup/xsize"),
 606                 fgGetInt("/sim/startup/ysize") );
 607     }
 608     osg::Camera *camera = viewer->getCamera();
 609
 610     if ( skyblend ) {
 611
 612         if ( fgGetBool("/sim/rendering/textures") ) {
 613             SGVec4f clearColor(l->adj_fog_color());
 614             camera->setClearColor(osg::Vec4(0.0, 0.0, 0.0, 1.0));
 615         }
 616     } else {
 617         SGVec4f clearColor(l->sky_color());
 618         camera->setClearColor(osg::Vec4(0.0, 0.0, 0.0, 1.0));
 619     }
 620
 621     // update fog params if visibility has changed
 622     double visibility_meters = fgGetDouble("/environment/visibility-m");
 623     thesky->set_visibility(visibility_meters);
 624
 625     double altitude_m = fgGetDouble("/position/altitude-ft") * SG_FEET_TO_METER;
 626     thesky->modify_vis( altitude_m, 0.0 /* time factor, now unused */);
 627
 628     // update the sky dome
 629     if ( skyblend ) {
 630
 631         // The sun and moon distances are scaled down versions
 632         // of the actual distance to get both the moon and the sun
 633         // within the range of the far clip plane.
 634         // Moon distance:    384,467 kilometers
 635         // Sun distance: 150,000,000 kilometers
 636
 637         double sun_horiz_eff, moon_horiz_eff;
 638         if (fgGetBool("/sim/rendering/horizon-effect")) {
 639             sun_horiz_eff
 640                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_sun_angle()),
 641                                              0.0),
 642                              0.33) / 3.0;
 643             moon_horiz_eff
 644                 = 0.67 + pow(osg::clampAbove(0.5 + cos(l->get_moon_angle()),
 645                                              0.0),
 646                              0.33)/3.0;
 647         } else {
 648            sun_horiz_eff = moon_horiz_eff = 1.0;
 649         }
 650
 651         SGSkyState sstate;
 652         sstate.pos       = current__view->getViewPosition();
 653         sstate.pos_geod  = current__view->getPosition();
 654         sstate.ori       = current__view->getViewOrientation();
 655         sstate.spin      = l->get_sun_rotation();
 656         sstate.gst       = globals->get_time_params()->getGst();
 657         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 658         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 659         sstate.sun_angle = l->get_sun_angle();
 660
 661         SGSkyColor scolor;
 662         scolor.sky_color   = SGVec3f(l->sky_color().data());
 663         scolor.adj_sky_color = SGVec3f(l->adj_sky_color().data());
 664         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 665         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 666         scolor.sun_angle   = l->get_sun_angle();
 667         scolor.moon_angle  = l->get_moon_angle();
 668
 669         double delta_time_sec = fgGetDouble("/sim/time/delta-sec");
 670         thesky->reposition( sstate, *globals->get_ephem(), delta_time_sec );
 671         thesky->repaint( scolor, *globals->get_ephem() );
 672
 673             //OSGFIXME
 674 //         shadows->setupShadows(
 675 //           current__view->getLongitude_deg(),
 676 //           current__view->getLatitude_deg(),
 677 //           globals->get_time_params()->getGst(),
 678 //           globals->get_ephem()->getSunRightAscension(),
 679 //           globals->get_ephem()->getSunDeclination(),
 680 //           l->get_sun_angle());
 681
 682     }
 683
 684 //     sgEnviro.setLight(l->adj_fog_color());
 685 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 686 //         current__view->get_world_up(),
 687 //         current__view->getLongitude_deg(),
 688 //         current__view->getLatitude_deg(),
 689 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 690 //         delta_time_sec);
 691
 692     // OSGFIXME
 693 //     sgEnviro.drawLightning();
 694
 695 //        double current_view_origin_airspeed_horiz_kt =
 696 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 697 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 698 //                                * SGD_DEGREES_TO_RADIANS);
 699
 700     // OSGFIXME
 701 //     if( is_internal )
 702 //         shadows->endOfFrame();
 703
 704     // need to call the update visitor once
 705     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 706     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 707                                 current__view->getViewOrientation());
 708     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 709     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 710                              l->scene_diffuse(), l->scene_specular(),
 711                              l->adj_fog_color(),
 712                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 713     mUpdateVisitor->setVisibility(actual_visibility);
 714     simgear::GroundLightManager::instance()->update(mUpdateVisitor.get());
 715     bool hotspots = fgGetBool("/sim/panel-hotspots");
 716     osg::Node::NodeMask cullMask = ~simgear::LIGHTS_BITS & ~simgear::PICK_BIT;
 717     cullMask |= simgear::GroundLightManager::instance()
 718         ->getLightNodeMask(mUpdateVisitor.get());
 719     if (hotspots)
 720         cullMask |= simgear::PICK_BIT;
 721     CameraGroup::getDefault()->setCameraCullMasks(cullMask);
 722 }
 723
 724
 725
 726 // options.cxx needs to see this for toggle_panel()
 727 // Handle new window size or exposure
 728 void
 729 FGRenderer::resize( int width, int height ) {
 730     int view_h;
 731
 732     if ( (!fgGetBool("/sim/virtual-cockpit"))
 733          && fgPanelVisible() && idle_state == 1000 ) {
 734         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 735                              globals->get_current_panel()->getYOffset()) / 768.0);
 736     } else {
 737         view_h = height;
 738     }
 739
 740     static int lastwidth = 0;
 741     static int lastheight = 0;
 742     if (width != lastwidth)
 743         fgSetInt("/sim/startup/xsize", lastwidth = width);
 744     if (height != lastheight)
 745         fgSetInt("/sim/startup/ysize", lastheight = height);
 746
 747     // for all views
 748     FGViewMgr *viewmgr = globals->get_viewmgr();
 749     if (viewmgr) {
 750       for ( int i = 0; i < viewmgr->size(); ++i ) {
 751         viewmgr->get_view(i)->
 752           set_aspect_ratio((float)view_h / (float)width);
 753       }
 754     }
 755 }
 756
 757 bool
 758 FGRenderer::pick(std::vector<SGSceneryPick>& pickList,
 759                  const osgGA::GUIEventAdapter* ea)
 760 {
 761     // wipe out the return ...
 762     pickList.clear();
 763     typedef osgUtil::LineSegmentIntersector::Intersections Intersections;
 764     Intersections intersections;
 765
 766     if (!computeIntersections(CameraGroup::getDefault(), ea, intersections))
 767         return false;
 768     for (Intersections::iterator hit = intersections.begin(),
 769              e = intersections.end();
 770          hit != e;
 771          ++hit) {
 772         const osg::NodePath& np = hit->nodePath;
 773         osg::NodePath::const_reverse_iterator npi;
 774         for (npi = np.rbegin(); npi != np.rend(); ++npi) {
 775             SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
 776             if (!ud)
 777                 continue;
 778             for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
 779                 SGPickCallback* pickCallback = ud->getPickCallback(i);
 780                 if (!pickCallback)
 781                     continue;
 782                 SGSceneryPick sceneryPick;
 783                 sceneryPick.info.local = toSG(hit->getLocalIntersectPoint());
 784                 sceneryPick.info.wgs84 = toSG(hit->getWorldIntersectPoint());
 785                 sceneryPick.callback = pickCallback;
 786                 pickList.push_back(sceneryPick);
 787             }
 788         }
 789     }
 790     return !pickList.empty();
 791 }
 792
 793 void
 794 FGRenderer::setViewer(osgViewer::Viewer* viewer_)
 795 {
 796     viewer = viewer_;
 797 }
 798
 799 void
 800 FGRenderer::setEventHandler(FGEventHandler* eventHandler_)
 801 {
 802     eventHandler = eventHandler_;
 803 }
 804
 805 void
 806 FGRenderer::addCamera(osg::Camera* camera, bool useSceneData)
 807 {
 808     mRealRoot->addChild(camera);
 809 }
 810
 811 bool
 812 fgDumpSceneGraphToFile(const char* filename)
 813 {
 814     return osgDB::writeNodeFile(*mRealRoot.get(), filename);
 815 }
 816
 817 bool
 818 fgDumpTerrainBranchToFile(const char* filename)
 819 {
 820     return osgDB::writeNodeFile( *globals->get_scenery()->get_terrain_branch(),
 821                                  filename );
 822 }
 823
 824 // For debugging
 825 bool
 826 fgDumpNodeToFile(osg::Node* node, const char* filename)
 827 {
 828     return osgDB::writeNodeFile(*node, filename);
 829 }
 830
 831 namespace flightgear
 832 {
 833 using namespace osg;
 834
 835 class VisibleSceneInfoVistor : public NodeVisitor, CullStack
 836 {
 837 public:
 838     VisibleSceneInfoVistor()
 839         : NodeVisitor(CULL_VISITOR, TRAVERSE_ACTIVE_CHILDREN)
 840     {
 841         setCullingMode(CullSettings::SMALL_FEATURE_CULLING
 842                        | CullSettings::VIEW_FRUSTUM_CULLING);
 843         setComputeNearFarMode(CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 844     }
 845
 846     VisibleSceneInfoVistor(const VisibleSceneInfoVistor& rhs)
 847     {
 848     }
 849
 850     META_NodeVisitor("flightgear","VisibleSceneInfoVistor")
 851
 852     typedef std::map<const std::string,int> InfoMap;
 853
 854     void getNodeInfo(Node* node)
 855     {
 856         const char* typeName = typeid(*node).name();
 857         classInfo[typeName]++;
 858         const std::string& nodeName = node->getName();
 859         if (!nodeName.empty())
 860             nodeInfo[nodeName]++;
 861     }
 862
 863     void dumpInfo()
 864     {
 865         using namespace std;
 866         typedef vector<InfoMap::iterator> FreqVector;
 867         cout << "class info:\n";
 868         FreqVector classes;
 869         for (InfoMap::iterator itr = classInfo.begin(), end = classInfo.end();
 870              itr != end;
 871              ++itr)
 872             classes.push_back(itr);
 873         sort(classes.begin(), classes.end(), freqComp);
 874         for (FreqVector::iterator itr = classes.begin(), end = classes.end();
 875              itr != end;
 876              ++itr) {
 877             cout << (*itr)->first << " " << (*itr)->second << "\n";
 878         }
 879         cout << "\nnode info:\n";
 880         FreqVector nodes;
 881         for (InfoMap::iterator itr = nodeInfo.begin(), end = nodeInfo.end();
 882              itr != end;
 883              ++itr)
 884             nodes.push_back(itr);
 885
 886         sort (nodes.begin(), nodes.end(), freqComp);
 887         for (FreqVector::iterator itr = nodes.begin(), end = nodes.end();
 888              itr != end;
 889              ++itr) {
 890             cout << (*itr)->first << " " << (*itr)->second << "\n";
 891         }
 892         cout << endl;
 893     }
 894
 895     void doTraversal(Camera* camera, Node* root, Viewport* viewport)
 896     {
 897         ref_ptr<RefMatrix> projection
 898             = createOrReuseMatrix(camera->getProjectionMatrix());
 899         ref_ptr<RefMatrix> mv = createOrReuseMatrix(camera->getViewMatrix());
 900         if (!viewport)
 901             viewport = camera->getViewport();
 902         if (viewport)
 903             pushViewport(viewport);
 904         pushProjectionMatrix(projection.get());
 905         pushModelViewMatrix(mv.get(), Transform::ABSOLUTE_RF);
 906         root->accept(*this);
 907         popModelViewMatrix();
 908         popProjectionMatrix();
 909         if (viewport)
 910             popViewport();
 911         dumpInfo();
 912     }
 913
 914     void apply(Node& node)
 915     {
 916         if (isCulled(node))
 917             return;
 918         pushCurrentMask();
 919         getNodeInfo(&node);
 920         traverse(node);
 921         popCurrentMask();
 922     }
 923     void apply(Group& node)
 924     {
 925         if (isCulled(node))
 926             return;
 927         pushCurrentMask();
 928         getNodeInfo(&node);
 929         traverse(node);
 930         popCurrentMask();
 931     }
 932
 933     void apply(Transform& node)
 934     {
 935         if (isCulled(node))
 936             return;
 937         pushCurrentMask();
 938         ref_ptr<RefMatrix> matrix = createOrReuseMatrix(*getModelViewMatrix());
 939         node.computeLocalToWorldMatrix(*matrix,this);
 940         pushModelViewMatrix(matrix.get(), node.getReferenceFrame());
 941         getNodeInfo(&node);
 942         traverse(node);
 943         popModelViewMatrix();
 944         popCurrentMask();
 945     }
 946
 947     void apply(Camera& camera)
 948     {
 949         // Save current cull settings
 950         CullSettings saved_cull_settings(*this);
 951
 952         // set cull settings from this Camera
 953         setCullSettings(camera);
 954         // inherit the settings from above
 955         inheritCullSettings(saved_cull_settings, camera.getInheritanceMask());
 956
 957         // set the cull mask.
 958         unsigned int savedTraversalMask = getTraversalMask();
 959         bool mustSetCullMask = (camera.getInheritanceMask()
 960                                 & osg::CullSettings::CULL_MASK) == 0;
 961         if (mustSetCullMask)
 962             setTraversalMask(camera.getCullMask());
 963
 964         osg::RefMatrix* projection = 0;
 965         osg::RefMatrix* modelview = 0;
 966
 967         if (camera.getReferenceFrame()==osg::Transform::RELATIVE_RF) {
 968             if (camera.getTransformOrder()==osg::Camera::POST_MULTIPLY) {
 969                 projection = createOrReuseMatrix(*getProjectionMatrix()
 970                                                  *camera.getProjectionMatrix());
 971                 modelview = createOrReuseMatrix(*getModelViewMatrix()
 972                                                 * camera.getViewMatrix());
 973             }
 974             else {              // pre multiply
 975                 projection = createOrReuseMatrix(camera.getProjectionMatrix()
 976                                                  * (*getProjectionMatrix()));
 977                 modelview = createOrReuseMatrix(camera.getViewMatrix()
 978                                                 * (*getModelViewMatrix()));
 979             }
 980         } else {
 981             // an absolute reference frame
 982             projection = createOrReuseMatrix(camera.getProjectionMatrix());
 983             modelview = createOrReuseMatrix(camera.getViewMatrix());
 984         }
 985         if (camera.getViewport())
 986             pushViewport(camera.getViewport());
 987
 988         pushProjectionMatrix(projection);
 989         pushModelViewMatrix(modelview, camera.getReferenceFrame());
 990
 991         traverse(camera);
 992
 993         // restore the previous model view matrix.
 994         popModelViewMatrix();
 995
 996         // restore the previous model view matrix.
 997         popProjectionMatrix();
 998
 999         if (camera.getViewport()) popViewport();
1000
1001         // restore the previous traversal mask settings
1002         if (mustSetCullMask)
1003             setTraversalMask(savedTraversalMask);
1004
1005         // restore the previous cull settings
1006         setCullSettings(saved_cull_settings);
1007     }
1008
1009 protected:
1010     // sort in reverse
1011     static bool freqComp(const InfoMap::iterator& lhs, const InfoMap::iterator& rhs)
1012     {
1013         return lhs->second > rhs->second;
1014     }
1015     InfoMap classInfo;
1016     InfoMap nodeInfo;
1017 };
1018
1019 bool printVisibleSceneInfo(FGRenderer* renderer)
1020 {
1021     osgViewer::Viewer* viewer = renderer->getViewer();
1022     VisibleSceneInfoVistor vsv;
1023     Viewport* vp = 0;
1024     if (!viewer->getCamera()->getViewport() && viewer->getNumSlaves() > 0) {
1025         const View::Slave& slave = viewer->getSlave(0);
1026         vp = slave._camera->getViewport();
1027     }
1028     vsv.doTraversal(viewer->getCamera(), viewer->getSceneData(), vp);
1029     return true;
1030 }
1031 }
1032 // end of renderer.cxx
1033