src/Main/renderer.cxx

   1 // renderer.cxx -- top level sim routines
   2 //
   3 // Written by Curtis Olson, started May 1997.
   4 // This file contains parts of main.cxx prior to october 2004
   5 //
   6 // Copyright (C) 1997 - 2002  Curtis L. Olson  - http://www.flightgear.org/~curt
   7 //
   8 // This program is free software; you can redistribute it and/or
   9 // modify it under the terms of the GNU General Public License as
  10 // published by the Free Software Foundation; either version 2 of the
  11 // License, or (at your option) any later version.
  12 //
  13 // This program is distributed in the hope that it will be useful, but
  14 // WITHOUT ANY WARRANTY; without even the implied warranty of
  15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16 // General Public License for more details.
  17 //
  18 // You should have received a copy of the GNU General Public License
  19 // along with this program; if not, write to the Free Software
  20 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  21 //
  22 // $Id$
  23
  24
  25 #ifdef HAVE_CONFIG_H
  26 #  include <config.h>
  27 #endif
  28
  29 #include <simgear/compiler.h>
  30
  31 #ifdef HAVE_WINDOWS_H
  32 #  include <windows.h>
  33 #endif
  34
  35 #include <osg/ref_ptr>
  36 #include <osg/AlphaFunc>
  37 #include <osg/BlendFunc>
  38 #include <osg/Camera>
  39 #include <osg/CameraView>
  40 #include <osg/CullFace>
  41 #include <osg/Depth>
  42 #include <osg/Fog>
  43 #include <osg/Group>
  44 #include <osg/Light>
  45 #include <osg/LightModel>
  46 #include <osg/LightSource>
  47 #include <osg/NodeCallback>
  48 #include <osg/Notify>
  49 #include <osg/PolygonMode>
  50 #include <osg/PolygonOffset>
  51 #include <osg/ShadeModel>
  52 #include <osg/TexEnv>
  53
  54 #include <osgUtil/SceneView>
  55 #include <osgUtil/UpdateVisitor>
  56 #include <osgUtil/IntersectVisitor>
  57
  58 #include <osg/io_utils>
  59 #include <osgDB/WriteFile>
  60 #include <osgDB/ReadFile>
  61 #include <sstream>
  62
  63 #include <simgear/math/SGMath.hxx>
  64 #include <simgear/screen/extensions.hxx>
  65 #include <simgear/scene/material/matlib.hxx>
  66 #include <simgear/scene/model/animation.hxx>
  67 #include <simgear/scene/model/model.hxx>
  68 #include <simgear/scene/model/modellib.hxx>
  69 #include <simgear/scene/model/placement.hxx>
  70 #include <simgear/scene/util/SGUpdateVisitor.hxx>
  71 #include <simgear/scene/tgdb/pt_lights.hxx>
  72 #include <simgear/props/props.hxx>
  73 #include <simgear/timing/sg_time.hxx>
  74 #include <simgear/ephemeris/ephemeris.hxx>
  75 #include <simgear/math/sg_random.h>
  76 #ifdef FG_JPEG_SERVER
  77 #include <simgear/screen/jpgfactory.hxx>
  78 #endif
  79
  80 #include <simgear/environment/visual_enviro.hxx>
  81
  82 #include <Scenery/tileentry.hxx>
  83 #include <Time/light.hxx>
  84 #include <Time/light.hxx>
  85 #include <Aircraft/aircraft.hxx>
  86 #include <Cockpit/panel.hxx>
  87 #include <Cockpit/cockpit.hxx>
  88 #include <Cockpit/hud.hxx>
  89 #include <Model/panelnode.hxx>
  90 #include <Model/modelmgr.hxx>
  91 #include <Model/acmodel.hxx>
  92 #include <Scenery/scenery.hxx>
  93 #include <Scenery/redout.hxx>
  94 #include <Scenery/tilemgr.hxx>
  95 #include <ATC/ATCdisplay.hxx>
  96 #include <GUI/new_gui.hxx>
  97 #include <Instrumentation/instrument_mgr.hxx>
  98 #include <Instrumentation/HUD/HUD.hxx>
  99
 100 #include "splash.hxx"
 101 #include "renderer.hxx"
 102 #include "main.hxx"
 103
 104 class SGPuDrawable : public osg::Drawable {
 105 public:
 106   SGPuDrawable()
 107   {
 108     // Dynamic stuff, do not store geometry
 109     setUseDisplayList(false);
 110
 111     osg::StateSet* stateSet = getOrCreateStateSet();
 112     stateSet->setRenderBinDetails(1001, "RenderBin");
 113     // speed optimization?
 114     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 115     // We can do translucent menus, so why not. :-)
 116     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 117     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 118     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 119
 120     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 121
 122     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 123     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 124   }
 125   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 126   { drawImplementation(*renderInfo.getState()); }
 127   void drawImplementation(osg::State& state) const
 128   {
 129     state.pushStateSet(getStateSet());
 130     state.apply();
 131     state.setActiveTextureUnit(0);
 132     state.setClientActiveTextureUnit(0);
 133     state.disableAllVertexArrays();
 134
 135     glPushAttrib(GL_ALL_ATTRIB_BITS);
 136     glPushClientAttrib(~0u);
 137
 138     if((fgGetBool("/sim/atc/enabled"))
 139        || (fgGetBool("/sim/ai-traffic/enabled")))
 140       globals->get_ATC_display()->update(delta_time_sec, state);
 141
 142     puDisplay();
 143
 144     glPopClientAttrib();
 145     glPopAttrib();
 146
 147     state.popStateSet();
 148     state.dirtyAllModes();
 149     state.dirtyAllAttributes();
 150     state.dirtyAllVertexArrays();
 151   }
 152
 153   virtual osg::Object* cloneType() const { return new SGPuDrawable; }
 154   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGPuDrawable; }
 155
 156 private:
 157 };
 158
 159 class SGHUDAndPanelDrawable : public osg::Drawable {
 160 public:
 161   SGHUDAndPanelDrawable()
 162   {
 163     // Dynamic stuff, do not store geometry
 164     setUseDisplayList(false);
 165
 166     osg::StateSet* stateSet = getOrCreateStateSet();
 167     stateSet->setRenderBinDetails(1000, "RenderBin");
 168
 169     // speed optimization?
 170     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::OFF);
 171     stateSet->setAttribute(new osg::BlendFunc(osg::BlendFunc::SRC_ALPHA, osg::BlendFunc::ONE_MINUS_SRC_ALPHA));
 172     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 173     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 174     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 175
 176     stateSet->setTextureAttribute(0, new osg::TexEnv(osg::TexEnv::MODULATE));
 177   }
 178   virtual void drawImplementation(osg::RenderInfo& renderInfo) const
 179   { drawImplementation(*renderInfo.getState()); }
 180   void drawImplementation(osg::State& state) const
 181   {
 182     state.pushStateSet(getStateSet());
 183     state.apply();
 184     state.setActiveTextureUnit(0);
 185     state.setClientActiveTextureUnit(0);
 186     state.disableAllVertexArrays();
 187
 188     glPushAttrib(GL_ALL_ATTRIB_BITS);
 189     glPushClientAttrib(~0u);
 190
 191     fgCockpitUpdate(&state);
 192
 193     FGInstrumentMgr *instr = static_cast<FGInstrumentMgr*>(globals->get_subsystem("instrumentation"));
 194     HUD *hud = static_cast<HUD*>(instr->get_subsystem("hud"));
 195     hud->draw(state);
 196
 197     // update the panel subsystem
 198     if ( globals->get_current_panel() != NULL )
 199         globals->get_current_panel()->update(state);
 200     // We don't need a state here - can be safely removed when we can pick
 201     // correctly
 202     fgUpdate3DPanels();
 203
 204     glPopClientAttrib();
 205     glPopAttrib();
 206
 207     state.popStateSet();
 208     state.dirtyAllModes();
 209     state.dirtyAllAttributes();
 210     state.dirtyAllVertexArrays();
 211   }
 212
 213   virtual osg::Object* cloneType() const { return new SGHUDAndPanelDrawable; }
 214   virtual osg::Object* clone(const osg::CopyOp&) const { return new SGHUDAndPanelDrawable; }
 215
 216 private:
 217 };
 218
 219 class FGLightSourceUpdateCallback : public osg::NodeCallback {
 220 public:
 221   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 222   {
 223     assert(dynamic_cast<osg::LightSource*>(node));
 224     osg::LightSource* lightSource = static_cast<osg::LightSource*>(node);
 225     osg::Light* light = lightSource->getLight();
 226
 227     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 228     light->setAmbient(l->scene_ambient().osg());
 229     light->setDiffuse(l->scene_diffuse().osg());
 230     light->setSpecular(l->scene_specular().osg());
 231     SGVec4f position(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2], 0);
 232     light->setPosition(position.osg());
 233     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 234     light->setDirection(direction.osg());
 235     light->setSpotExponent(0);
 236     light->setSpotCutoff(180);
 237     light->setConstantAttenuation(1);
 238     light->setLinearAttenuation(0);
 239     light->setQuadraticAttenuation(0);
 240
 241     traverse(node, nv);
 242   }
 243 };
 244
 245 class FGWireFrameModeUpdateCallback : public osg::StateAttribute::Callback {
 246 public:
 247   FGWireFrameModeUpdateCallback() :
 248     mWireframe(fgGetNode("/sim/rendering/wireframe"))
 249   { }
 250   virtual void operator()(osg::StateAttribute* stateAttribute,
 251                           osg::NodeVisitor*)
 252   {
 253     assert(dynamic_cast<osg::PolygonMode*>(stateAttribute));
 254     osg::PolygonMode* polygonMode;
 255     polygonMode = static_cast<osg::PolygonMode*>(stateAttribute);
 256
 257     if (mWireframe->getBoolValue())
 258       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 259                            osg::PolygonMode::LINE);
 260     else
 261       polygonMode->setMode(osg::PolygonMode::FRONT_AND_BACK,
 262                            osg::PolygonMode::FILL);
 263   }
 264 private:
 265   SGSharedPtr<SGPropertyNode> mWireframe;
 266 };
 267
 268 class FGLightModelUpdateCallback : public osg::StateAttribute::Callback {
 269 public:
 270   FGLightModelUpdateCallback() :
 271     mHighlights(fgGetNode("/sim/rendering/specular-highlight"))
 272   { }
 273   virtual void operator()(osg::StateAttribute* stateAttribute,
 274                           osg::NodeVisitor*)
 275   {
 276     assert(dynamic_cast<osg::LightModel*>(stateAttribute));
 277     osg::LightModel* lightModel;
 278     lightModel = static_cast<osg::LightModel*>(stateAttribute);
 279
 280 #if 0
 281     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 282     lightModel->setAmbientIntensity(l->scene_ambient().osg());
 283 #else
 284     lightModel->setAmbientIntensity(osg::Vec4(0, 0, 0, 1));
 285 #endif
 286     lightModel->setTwoSided(true);
 287     lightModel->setLocalViewer(false);
 288
 289     if (mHighlights->getBoolValue()) {
 290       lightModel->setColorControl(osg::LightModel::SEPARATE_SPECULAR_COLOR);
 291     } else {
 292       lightModel->setColorControl(osg::LightModel::SINGLE_COLOR);
 293     }
 294   }
 295 private:
 296   SGSharedPtr<SGPropertyNode> mHighlights;
 297 };
 298
 299 class FGFogEnableUpdateCallback : public osg::StateSet::Callback {
 300 public:
 301   FGFogEnableUpdateCallback() :
 302     mFogEnabled(fgGetNode("/sim/rendering/fog"))
 303   { }
 304   virtual void operator()(osg::StateSet* stateSet, osg::NodeVisitor*)
 305   {
 306     if (strcmp(mFogEnabled->getStringValue(), "disabled") == 0) {
 307       stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 308     } else {
 309       stateSet->setMode(GL_FOG, osg::StateAttribute::ON);
 310     }
 311   }
 312 private:
 313   SGSharedPtr<SGPropertyNode> mFogEnabled;
 314 };
 315
 316 class FGFogUpdateCallback : public osg::StateAttribute::Callback {
 317 public:
 318   virtual void operator () (osg::StateAttribute* sa, osg::NodeVisitor* nv)
 319   {
 320     assert(dynamic_cast<SGUpdateVisitor*>(nv));
 321     assert(dynamic_cast<osg::Fog*>(sa));
 322     SGUpdateVisitor* updateVisitor = static_cast<SGUpdateVisitor*>(nv);
 323     osg::Fog* fog = static_cast<osg::Fog*>(sa);
 324     fog->setMode(osg::Fog::EXP2);
 325     fog->setColor(updateVisitor->getFogColor().osg());
 326     fog->setDensity(updateVisitor->getFogExp2Density());
 327   }
 328 };
 329
 330 // update callback for the switch node guarding that splash
 331 class FGScenerySwitchCallback : public osg::NodeCallback {
 332 public:
 333   virtual void operator()(osg::Node* node, osg::NodeVisitor* nv)
 334   {
 335     assert(dynamic_cast<osg::Switch*>(node));
 336     osg::Switch* sw = static_cast<osg::Switch*>(node);
 337
 338     double t = globals->get_sim_time_sec();
 339     bool enabled = 0 < t;
 340     sw->setValue(0, enabled);
 341     if (!enabled)
 342       return;
 343     traverse(node, nv);
 344   }
 345 };
 346
 347 // Sky structures
 348 SGSky *thesky;
 349
 350 osg::ref_ptr<osgUtil::SceneView> sceneView = new osgUtil::SceneView;  // This SceneView is used by class FGJpegHttpd ( jpg-httpd.cxx )
 351 static osg::ref_ptr<osg::FrameStamp> mFrameStamp = new osg::FrameStamp;
 352 static osg::ref_ptr<SGUpdateVisitor> mUpdateVisitor= new SGUpdateVisitor;
 353
 354 static osg::ref_ptr<osg::Group> mRealRoot = new osg::Group;
 355
 356 static osg::ref_ptr<osg::Group> mRoot = new osg::Group;
 357
 358 static osg::ref_ptr<osg::CameraView> mCameraView = new osg::CameraView;
 359 static osg::ref_ptr<osg::Camera> mBackGroundCamera = new osg::Camera;
 360
 361 FGRenderer::FGRenderer()
 362 {
 363 #ifdef FG_JPEG_SERVER
 364    jpgRenderFrame = FGRenderer::update;
 365 #endif
 366 }
 367
 368 FGRenderer::~FGRenderer()
 369 {
 370 #ifdef FG_JPEG_SERVER
 371    jpgRenderFrame = NULL;
 372 #endif
 373 }
 374
 375 // Initialize various GL/view parameters
 376 void
 377 FGRenderer::splashinit( void ) {
 378    // Add the splash screen node
 379    mRealRoot->addChild(fgCreateSplashNode());
 380    sceneView->setSceneData(mRealRoot.get());
 381
 382    sceneView->setDefaults(osgUtil::SceneView::COMPILE_GLOBJECTS_AT_INIT);
 383    sceneView->setFrameStamp(mFrameStamp.get());
 384    sceneView->setUpdateVisitor(mUpdateVisitor.get());
 385 }
 386
 387 void
 388 FGRenderer::init( void ) {
 389
 390     osg::initNotifyLevel();
 391
 392     // The number of polygon-offset "units" to place between layers.  In
 393     // principle, one is supposed to be enough.  In practice, I find that
 394     // my hardware/driver requires many more.
 395     osg::PolygonOffset::setUnitsMultiplier(1);
 396     osg::PolygonOffset::setFactorMultiplier(1);
 397
 398     // Go full screen if requested ...
 399     if ( fgGetBool("/sim/startup/fullscreen") )
 400         fgOSFullScreen();
 401
 402     if ( (!strcmp(fgGetString("/sim/rendering/fog"), "disabled")) ||
 403          (!fgGetBool("/sim/rendering/shading"))) {
 404         // if fastest fog requested, or if flat shading force fastest
 405         glHint ( GL_FOG_HINT, GL_FASTEST );
 406     } else if ( !strcmp(fgGetString("/sim/rendering/fog"), "nicest") ) {
 407         glHint ( GL_FOG_HINT, GL_DONT_CARE );
 408     }
 409
 410     glHint(GL_POLYGON_SMOOTH_HINT, GL_DONT_CARE);
 411     glHint(GL_LINE_SMOOTH_HINT, GL_DONT_CARE);
 412     glHint(GL_POINT_SMOOTH_HINT, GL_DONT_CARE);
 413
 414
 415     sceneView->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 416     sceneView->getCamera()->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 417
 418
 419     osg::StateSet* stateSet = mRoot->getOrCreateStateSet();
 420
 421     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::OFF);
 422
 423     stateSet->setAttribute(new osg::Depth(osg::Depth::LESS));
 424     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 425
 426     stateSet->setAttribute(new osg::AlphaFunc(osg::AlphaFunc::GREATER, 0.01));
 427     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::OFF);
 428     stateSet->setAttribute(new osg::BlendFunc);
 429     stateSet->setMode(GL_BLEND, osg::StateAttribute::OFF);
 430
 431     stateSet->setMode(GL_FOG, osg::StateAttribute::OFF);
 432
 433     // this will be set below
 434     stateSet->setMode(GL_NORMALIZE, osg::StateAttribute::OFF);
 435
 436     osg::Material* material = new osg::Material;
 437     stateSet->setAttribute(material);
 438
 439     stateSet->setTextureAttribute(0, new osg::TexEnv);
 440     stateSet->setTextureMode(0, GL_TEXTURE_2D, osg::StateAttribute::OFF);
 441
 442
 443 //     stateSet->setAttribute(new osg::CullFace(osg::CullFace::BACK));
 444 //     stateSet->setMode(GL_CULL_FACE, osg::StateAttribute::ON);
 445
 446     // this is the topmost scenegraph node for osg
 447     mBackGroundCamera->addChild(thesky->getPreRoot());
 448     mBackGroundCamera->setClearMask(0);
 449
 450     GLbitfield inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 451     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 452     inheritanceMask &= ~osg::CullSettings::NEAR_FAR_RATIO;
 453     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 454     mBackGroundCamera->setInheritanceMask(inheritanceMask);
 455     mBackGroundCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 456     mBackGroundCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 457     mBackGroundCamera->setRenderOrder(osg::Camera::NESTED_RENDER);
 458
 459     stateSet = mBackGroundCamera->getOrCreateStateSet();
 460     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::OFF);
 461
 462     osg::Group* sceneGroup = new osg::Group;
 463     sceneGroup->addChild(globals->get_scenery()->get_scene_graph());
 464     sceneGroup->addChild(thesky->getCloudRoot());
 465
 466     stateSet = sceneGroup->getOrCreateStateSet();
 467     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 468     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 469
 470     // need to update the light on every frame
 471     osg::LightSource* lightSource = new osg::LightSource;
 472     lightSource->setUpdateCallback(new FGLightSourceUpdateCallback);
 473     // relative because of CameraView being just a clever transform node
 474     lightSource->setReferenceFrame(osg::LightSource::RELATIVE_RF);
 475     lightSource->setLocalStateSetModes(osg::StateAttribute::ON);
 476     mRoot->addChild(lightSource);
 477
 478     lightSource->addChild(mBackGroundCamera.get());
 479     lightSource->addChild(sceneGroup);
 480
 481
 482     stateSet = globals->get_scenery()->get_scene_graph()->getOrCreateStateSet();
 483     stateSet->setMode(GL_BLEND, osg::StateAttribute::ON);
 484     stateSet->setMode(GL_ALPHA_TEST, osg::StateAttribute::ON);
 485     stateSet->setMode(GL_LIGHTING, osg::StateAttribute::ON);
 486     stateSet->setMode(GL_DEPTH_TEST, osg::StateAttribute::ON);
 487
 488     // enable disable specular highlights.
 489     // is the place where we might plug in an other fragment shader ...
 490     osg::LightModel* lightModel = new osg::LightModel;
 491     lightModel->setUpdateCallback(new FGLightModelUpdateCallback);
 492     stateSet->setAttribute(lightModel);
 493
 494     // switch to enable wireframe
 495     osg::PolygonMode* polygonMode = new osg::PolygonMode;
 496     polygonMode->setUpdateCallback(new FGWireFrameModeUpdateCallback);
 497     stateSet->setAttributeAndModes(polygonMode);
 498
 499     // scene fog handling
 500     osg::Fog* fog = new osg::Fog;
 501     fog->setUpdateCallback(new FGFogUpdateCallback);
 502     stateSet->setAttributeAndModes(fog);
 503     stateSet->setUpdateCallback(new FGFogEnableUpdateCallback);
 504
 505     // plug in the GUI
 506     osg::Camera* guiCamera = new osg::Camera;
 507     guiCamera->setRenderOrder(osg::Camera::POST_RENDER, 100);
 508     guiCamera->setClearMask(0);
 509     inheritanceMask = osg::CullSettings::ALL_VARIABLES;
 510     inheritanceMask &= ~osg::CullSettings::COMPUTE_NEAR_FAR_MODE;
 511     inheritanceMask &= ~osg::CullSettings::CULLING_MODE;
 512     guiCamera->setInheritanceMask(inheritanceMask);
 513     guiCamera->setComputeNearFarMode(osg::CullSettings::DO_NOT_COMPUTE_NEAR_FAR);
 514     guiCamera->setCullingMode(osg::CullSettings::NO_CULLING);
 515     osg::Geode* geode = new osg::Geode;
 516     geode->addDrawable(new SGPuDrawable);
 517     geode->addDrawable(new SGHUDAndPanelDrawable);
 518     guiCamera->addChild(geode);
 519
 520     mCameraView->addChild(mRoot.get());
 521
 522     osg::Switch* sw = new osg::Switch;
 523     sw->setUpdateCallback(new FGScenerySwitchCallback);
 524     sw->addChild(mCameraView.get());
 525
 526     mRealRoot->addChild(sw);
 527     mRealRoot->addChild(FGCreateRedoutNode());
 528     mRealRoot->addChild(guiCamera);
 529 }
 530
 531
 532 // Update all Visuals (redraws anything graphics related)
 533 void
 534 FGRenderer::update( bool refresh_camera_settings ) {
 535     bool scenery_loaded = fgGetBool("sim/sceneryloaded")
 536                           || fgGetBool("sim/sceneryloaded-override");
 537
 538     if ( idle_state < 1000 || !scenery_loaded ) {
 539         fgSetDouble("/sim/startup/splash-alpha", 1.0);
 540
 541         // Keep resetting sim time while the sim is initializing
 542         globals->set_sim_time_sec( 0.0 );
 543
 544         // the splash screen is now in the scenegraph
 545         sceneView->update();
 546         sceneView->cull();
 547         sceneView->draw();
 548
 549         return;
 550     }
 551
 552     // Fade out the splash screen over the first three seconds.
 553     double sAlpha = SGMiscd::max(0, (2.5 - globals->get_sim_time_sec()) / 2.5);
 554     fgSetDouble("/sim/startup/splash-alpha", sAlpha);
 555
 556     bool skyblend = fgGetBool("/sim/rendering/skyblend");
 557     bool use_point_sprites = fgGetBool("/sim/rendering/point-sprites");
 558     bool enhanced_lighting = fgGetBool("/sim/rendering/enhanced-lighting");
 559     bool distance_attenuation
 560         = fgGetBool("/sim/rendering/distance-attenuation");
 561     // OSGFIXME
 562     SGConfigureDirectionalLights( use_point_sprites, enhanced_lighting,
 563                                   distance_attenuation );
 564
 565     static const SGPropertyNode *groundlevel_nearplane
 566         = fgGetNode("/sim/current-view/ground-level-nearplane-m");
 567
 568     FGLight *l = static_cast<FGLight*>(globals->get_subsystem("lighting"));
 569
 570     // update fog params
 571     double actual_visibility;
 572     if (fgGetBool("/environment/clouds/status")) {
 573         actual_visibility = thesky->get_visibility();
 574     } else {
 575         actual_visibility = fgGetDouble("/environment/visibility-m");
 576     }
 577
 578     // idle_state is now 1000 meaning we've finished all our
 579     // initializations and are running the main loop, so this will
 580     // now work without seg faulting the system.
 581
 582     FGViewer *current__view = globals->get_current_view();
 583     // Force update of center dependent values ...
 584     current__view->set_dirty();
 585
 586     if ( refresh_camera_settings ) {
 587         // update view port
 588         resize( fgGetInt("/sim/startup/xsize"),
 589                 fgGetInt("/sim/startup/ysize") );
 590
 591         SGVec3d position = current__view->getViewPosition();
 592         SGQuatd attitude = current__view->getViewOrientation();
 593         SGVec3d osgPosition = attitude.transform(-position);
 594         mCameraView->setPosition(osgPosition.osg());
 595         mCameraView->setAttitude(inverse(attitude).osg());
 596     }
 597
 598     if ( skyblend ) {
 599         if ( fgGetBool("/sim/rendering/textures") ) {
 600             SGVec4f clearColor(l->adj_fog_color());
 601             sceneView->getCamera()->setClearColor(clearColor.osg());
 602         }
 603     } else {
 604         SGVec4f clearColor(l->sky_color());
 605         sceneView->getCamera()->setClearColor(clearColor.osg());
 606     }
 607
 608     // update fog params if visibility has changed
 609     double visibility_meters = fgGetDouble("/environment/visibility-m");
 610     thesky->set_visibility(visibility_meters);
 611
 612     thesky->modify_vis( cur_fdm_state->get_Altitude() * SG_FEET_TO_METER,
 613                         ( global_multi_loop * fgGetInt("/sim/speed-up") )
 614                         / (double)fgGetInt("/sim/model-hz") );
 615
 616     // update the sky dome
 617     if ( skyblend ) {
 618
 619         // The sun and moon distances are scaled down versions
 620         // of the actual distance to get both the moon and the sun
 621         // within the range of the far clip plane.
 622         // Moon distance:    384,467 kilometers
 623         // Sun distance: 150,000,000 kilometers
 624
 625         double sun_horiz_eff, moon_horiz_eff;
 626         if (fgGetBool("/sim/rendering/horizon-effect")) {
 627            sun_horiz_eff = 0.67+pow(0.5+cos(l->get_sun_angle())*2/2, 0.33)/3;
 628            moon_horiz_eff = 0.67+pow(0.5+cos(l->get_moon_angle())*2/2, 0.33)/3;
 629         } else {
 630            sun_horiz_eff = moon_horiz_eff = 1.0;
 631         }
 632
 633         static SGSkyState sstate;
 634
 635         sstate.view_pos  = toVec3f(current__view->get_view_pos());
 636         sstate.zero_elev = toVec3f(current__view->get_zero_elev());
 637         sstate.view_up   = current__view->get_world_up();
 638         sstate.lon       = current__view->getLongitude_deg()
 639                             * SGD_DEGREES_TO_RADIANS;
 640         sstate.lat       = current__view->getLatitude_deg()
 641                             * SGD_DEGREES_TO_RADIANS;
 642         sstate.alt       = current__view->getAltitudeASL_ft()
 643                             * SG_FEET_TO_METER;
 644         sstate.spin      = l->get_sun_rotation();
 645         sstate.gst       = globals->get_time_params()->getGst();
 646         sstate.sun_ra    = globals->get_ephem()->getSunRightAscension();
 647         sstate.sun_dec   = globals->get_ephem()->getSunDeclination();
 648         sstate.sun_dist  = 50000.0 * sun_horiz_eff;
 649         sstate.moon_ra   = globals->get_ephem()->getMoonRightAscension();
 650         sstate.moon_dec  = globals->get_ephem()->getMoonDeclination();
 651         sstate.moon_dist = 40000.0 * moon_horiz_eff;
 652         sstate.sun_angle = l->get_sun_angle();
 653
 654
 655         /*
 656          SG_LOG( SG_GENERAL, SG_BULK, "thesky->repaint() sky_color = "
 657          << l->sky_color()[0] << " "
 658          << l->sky_color()[1] << " "
 659          << l->sky_color()[2] << " "
 660          << l->sky_color()[3] );
 661         SG_LOG( SG_GENERAL, SG_BULK, "    fog = "
 662          << l->fog_color()[0] << " "
 663          << l->fog_color()[1] << " "
 664          << l->fog_color()[2] << " "
 665          << l->fog_color()[3] );
 666         SG_LOG( SG_GENERAL, SG_BULK,
 667                 "    sun_angle = " << l->sun_angle
 668          << "    moon_angle = " << l->moon_angle );
 669         */
 670
 671         static SGSkyColor scolor;
 672
 673         scolor.sky_color   = SGVec3f(l->sky_color().data());
 674         scolor.fog_color   = SGVec3f(l->adj_fog_color().data());
 675         scolor.cloud_color = SGVec3f(l->cloud_color().data());
 676         scolor.sun_angle   = l->get_sun_angle();
 677         scolor.moon_angle  = l->get_moon_angle();
 678         scolor.nplanets    = globals->get_ephem()->getNumPlanets();
 679         scolor.nstars      = globals->get_ephem()->getNumStars();
 680         scolor.planet_data = globals->get_ephem()->getPlanets();
 681         scolor.star_data   = globals->get_ephem()->getStars();
 682
 683         thesky->reposition( sstate, delta_time_sec );
 684         thesky->repaint( scolor );
 685
 686         /*
 687         SG_LOG( SG_GENERAL, SG_BULK,
 688                 "thesky->reposition( view_pos = " << view_pos[0] << " "
 689          << view_pos[1] << " " << view_pos[2] );
 690         SG_LOG( SG_GENERAL, SG_BULK,
 691                 "    zero_elev = " << zero_elev[0] << " "
 692          << zero_elev[1] << " " << zero_elev[2]
 693          << " lon = " << cur_fdm_state->get_Longitude()
 694          << " lat = " << cur_fdm_state->get_Latitude() );
 695         SG_LOG( SG_GENERAL, SG_BULK,
 696                 "    sun_rot = " << l->get_sun_rotation
 697          << " gst = " << SGTime::cur_time_params->getGst() );
 698         SG_LOG( SG_GENERAL, SG_BULK,
 699              "    sun ra = " << globals->get_ephem()->getSunRightAscension()
 700           << " sun dec = " << globals->get_ephem()->getSunDeclination()
 701           << " moon ra = " << globals->get_ephem()->getMoonRightAscension()
 702           << " moon dec = " << globals->get_ephem()->getMoonDeclination() );
 703         */
 704
 705         //OSGFIXME
 706 //         shadows->setupShadows(
 707 //           current__view->getLongitude_deg(),
 708 //           current__view->getLatitude_deg(),
 709 //           globals->get_time_params()->getGst(),
 710 //           globals->get_ephem()->getSunRightAscension(),
 711 //           globals->get_ephem()->getSunDeclination(),
 712 //           l->get_sun_angle());
 713
 714     }
 715
 716 //     sgEnviro.setLight(l->adj_fog_color());
 717
 718     // texture parameters
 719     glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST );
 720
 721     double agl = current__view->getAltitudeASL_ft()*SG_FEET_TO_METER
 722       - current__view->getSGLocation()->get_cur_elev_m();
 723
 724     float scene_nearplane, scene_farplane;
 725     if ( agl > 10.0 ) {
 726         scene_nearplane = 10.0f;
 727         scene_farplane = 120000.0f;
 728     } else {
 729         scene_nearplane = groundlevel_nearplane->getDoubleValue();
 730         scene_farplane = 120000.0f;
 731     }
 732     setNearFar( scene_nearplane, scene_farplane );
 733
 734 //     sgEnviro.startOfFrame(current__view->get_view_pos(),
 735 //         current__view->get_world_up(),
 736 //         current__view->getLongitude_deg(),
 737 //         current__view->getLatitude_deg(),
 738 //         current__view->getAltitudeASL_ft() * SG_FEET_TO_METER,
 739 //         delta_time_sec);
 740
 741     // OSGFIXME
 742 //     sgEnviro.drawLightning();
 743
 744 //        double current_view_origin_airspeed_horiz_kt =
 745 //         fgGetDouble("/velocities/airspeed-kt", 0.0)
 746 //                        * cos( fgGetDouble("/orientation/pitch-deg", 0.0)
 747 //                                * SGD_DEGREES_TO_RADIANS);
 748        // TODO:find the real view speed, not the AC one
 749 //     sgEnviro.drawPrecipitation(
 750 //         fgGetDouble("/environment/metar/rain-norm", 0.0),
 751 //         fgGetDouble("/environment/metar/snow-norm", 0.0),
 752 //         fgGetDouble("/environment/metar/hail-norm", 0.0),
 753 //         current__view->getPitch_deg() + current__view->getPitchOffset_deg(),
 754 //         current__view->getRoll_deg() + current__view->getRollOffset_deg(),
 755 //         - current__view->getHeadingOffset_deg(),
 756 //                current_view_origin_airspeed_horiz_kt
 757 //                );
 758
 759     // OSGFIXME
 760 //     if( is_internal )
 761 //         shadows->endOfFrame();
 762
 763     // need to call the update visitor once
 764     globals->get_aircraft_model()->select( true );
 765     FGTileMgr::set_tile_filter( true );
 766     mFrameStamp->setReferenceTime(globals->get_sim_time_sec());
 767     mFrameStamp->setFrameNumber(1+mFrameStamp->getFrameNumber());
 768     mFrameStamp->setCalendarTime(*globals->get_time_params()->getGmt());
 769     mUpdateVisitor->setViewData(current__view->getViewPosition(),
 770                                 current__view->getViewOrientation());
 771     SGVec3f direction(l->sun_vec()[0], l->sun_vec()[1], l->sun_vec()[2]);
 772     mUpdateVisitor->setLight(direction, l->scene_ambient(),
 773                              l->scene_diffuse(), l->scene_specular(),
 774                              l->adj_fog_color(),
 775                              l->get_sun_angle()*SGD_RADIANS_TO_DEGREES);
 776     mUpdateVisitor->setVisibility(actual_visibility);
 777
 778     if (fgGetBool("/sim/panel-hotspots"))
 779       sceneView->setCullMask(sceneView->getCullMask()|SG_NODEMASK_PICK_BIT);
 780     else
 781       sceneView->setCullMask(sceneView->getCullMask()&(~SG_NODEMASK_PICK_BIT));
 782
 783     sceneView->update();
 784     sceneView->cull();
 785     sceneView->draw();
 786 }
 787
 788
 789
 790 // options.cxx needs to see this for toggle_panel()
 791 // Handle new window size or exposure
 792 void
 793 FGRenderer::resize( int width, int height ) {
 794     int view_h;
 795
 796     if ( (!fgGetBool("/sim/virtual-cockpit"))
 797          && fgPanelVisible() && idle_state == 1000 ) {
 798         view_h = (int)(height * (globals->get_current_panel()->getViewHeight() -
 799                              globals->get_current_panel()->getYOffset()) / 768.0);
 800     } else {
 801         view_h = height;
 802     }
 803
 804     sceneView->getViewport()->setViewport(0, height - view_h, width, view_h);
 805
 806     static int lastwidth = 0;
 807     static int lastheight = 0;
 808     if (width != lastwidth)
 809         fgSetInt("/sim/startup/xsize", lastwidth = width);
 810     if (height != lastheight)
 811         fgSetInt("/sim/startup/ysize", lastheight = height);
 812
 813     guiInitMouse(width, height);
 814
 815     // for all views
 816     FGViewMgr *viewmgr = globals->get_viewmgr();
 817     if (viewmgr) {
 818       for ( int i = 0; i < viewmgr->size(); ++i ) {
 819         viewmgr->get_view(i)->
 820           set_aspect_ratio((float)view_h / (float)width);
 821       }
 822
 823       setFOV( viewmgr->get_current_view()->get_h_fov(),
 824               viewmgr->get_current_view()->get_v_fov() );
 825     }
 826 }
 827
 828
 829 // These are wrapper functions around ssgSetNearFar() and ssgSetFOV()
 830 // which will post process and rewrite the resulting frustum if we
 831 // want to do asymmetric view frustums.
 832
 833 static void fgHackFrustum() {
 834
 835     // specify a percent of the configured view frustum to actually
 836     // display.  This is a bit of a hack to achieve asymmetric view
 837     // frustums.  For instance, if you want to display two monitors
 838     // side by side, you could specify each with a double fov, a 0.5
 839     // aspect ratio multiplier, and then the left side monitor would
 840     // have a left_pct = 0.0, a right_pct = 0.5, a bottom_pct = 0.0,
 841     // and a top_pct = 1.0.  The right side monitor would have a
 842     // left_pct = 0.5 and a right_pct = 1.0.
 843
 844     static SGPropertyNode *left_pct
 845         = fgGetNode("/sim/current-view/frustum-left-pct");
 846     static SGPropertyNode *right_pct
 847         = fgGetNode("/sim/current-view/frustum-right-pct");
 848     static SGPropertyNode *bottom_pct
 849         = fgGetNode("/sim/current-view/frustum-bottom-pct");
 850     static SGPropertyNode *top_pct
 851         = fgGetNode("/sim/current-view/frustum-top-pct");
 852
 853     double left, right;
 854     double bottom, top;
 855     double zNear, zFar;
 856     sceneView->getProjectionMatrixAsFrustum(left, right, bottom, top, zNear, zFar);
 857     // cout << " l = " << f->getLeft()
 858     //      << " r = " << f->getRight()
 859     //      << " b = " << f->getBot()
 860     //      << " t = " << f->getTop()
 861     //      << " n = " << f->getNear()
 862     //      << " f = " << f->getFar()
 863     //      << endl;
 864
 865     double width = right - left;
 866     double height = top - bottom;
 867
 868     double l, r, t, b;
 869
 870     if ( left_pct != NULL ) {
 871         l = left + width * left_pct->getDoubleValue();
 872     } else {
 873         l = left;
 874     }
 875
 876     if ( right_pct != NULL ) {
 877         r = left + width * right_pct->getDoubleValue();
 878     } else {
 879         r = right;
 880     }
 881
 882     if ( bottom_pct != NULL ) {
 883         b = bottom + height * bottom_pct->getDoubleValue();
 884     } else {
 885         b = bottom;
 886     }
 887
 888     if ( top_pct != NULL ) {
 889         t = bottom + height * top_pct->getDoubleValue();
 890     } else {
 891         t = top;
 892     }
 893
 894     sceneView->setProjectionMatrixAsFrustum(l, r, b, t, zNear, zFar);
 895 }
 896
 897
 898 // we need some static storage space for these values.  However, we
 899 // can't store it in a renderer class object because the functions
 900 // that manipulate these are static.  They are static so they can
 901 // interface to the display callback system.  There's probably a
 902 // better way, there has to be a better way, but I'm not seeing it
 903 // right now.
 904 static float fov_width = 55.0;
 905 static float fov_height = 42.0;
 906 static float fov_near = 1.0;
 907 static float fov_far = 1000.0;
 908
 909
 910 /** FlightGear code should use this routine to set the FOV rather than
 911  *  calling the ssg routine directly
 912  */
 913 void FGRenderer::setFOV( float w, float h ) {
 914     fov_width = w;
 915     fov_height = h;
 916
 917     sceneView->setProjectionMatrixAsPerspective(fov_height,
 918                                                 fov_width/fov_height,
 919                                                 fov_near, fov_far);
 920     // fully specify the view frustum before hacking it (so we don't
 921     // accumulate hacked effects
 922     fgHackFrustum();
 923 //     sgEnviro.setFOV( w, h );
 924 }
 925
 926
 927 /** FlightGear code should use this routine to set the Near/Far clip
 928  *  planes rather than calling the ssg routine directly
 929  */
 930 void FGRenderer::setNearFar( float n, float f ) {
 931 // OSGFIXME: we have currently too much z-buffer fights
 932 n = 0.1;
 933     fov_near = n;
 934     fov_far = f;
 935
 936     sceneView->setProjectionMatrixAsPerspective(fov_height,
 937                                                 fov_width/fov_height,
 938                                                 fov_near, fov_far);
 939
 940     // fully specify the view frustum before hacking it (so we don't
 941     // accumulate hacked effects
 942     fgHackFrustum();
 943 }
 944
 945 bool
 946 FGRenderer::pick( unsigned x, unsigned y,
 947                   std::vector<SGSceneryPick>& pickList )
 948 {
 949   // wipe out the return ...
 950   pickList.resize(0);
 951
 952   // we can get called early ...
 953   if (!sceneView.valid())
 954     return false;
 955
 956   osg::Node* sceneData = globals->get_scenery()->get_scene_graph();
 957   if (!sceneData)
 958     return false;
 959   osg::Viewport* viewport = sceneView->getViewport();
 960   if (!viewport)
 961     return false;
 962
 963   // don't know why, but the update has partly happened somehow,
 964   // so update the scenery part of the viewer
 965   FGViewer *current_view = globals->get_current_view();
 966   // Force update of center dependent values ...
 967   current_view->set_dirty();
 968   SGVec3d position = current_view->getViewPosition();
 969   SGQuatd attitude = current_view->getViewOrientation();
 970   SGVec3d osgPosition = attitude.transform(-position);
 971   mCameraView->setPosition(osgPosition.osg());
 972   mCameraView->setAttitude(inverse(attitude).osg());
 973
 974   osg::Matrix projection(sceneView->getProjectionMatrix());
 975   osg::Matrix modelview(sceneView->getViewMatrix());
 976
 977   osg::NodePathList nodePath = sceneData->getParentalNodePaths();
 978   // modify the view matrix so that it accounts for this nodePath's
 979   // accumulated transform
 980   if (!nodePath.empty())
 981     modelview.preMult(computeLocalToWorld(nodePath.front()));
 982
 983   // swap the y values ...
 984   y = viewport->height() - y;
 985   // set up the pick visitor
 986   osgUtil::PickVisitor pickVisitor(viewport, projection, modelview, x, y);
 987   sceneData->accept(pickVisitor);
 988   if (!pickVisitor.hits())
 989     return false;
 990
 991   // collect all interaction callbacks on the pick ray.
 992   // They get stored in the pickCallbacks list where they are sorted back
 993   // to front and croasest to finest wrt the scenery node they are attached to
 994   osgUtil::PickVisitor::LineSegmentHitListMap::const_iterator mi;
 995   for (mi = pickVisitor.getSegHitList().begin();
 996        mi != pickVisitor.getSegHitList().end();
 997        ++mi) {
 998     osgUtil::IntersectVisitor::HitList::const_iterator hi;
 999     for (hi = mi->second.begin(); hi != mi->second.end(); ++hi) {
1000       // ok, go back the nodes and ask for intersection callbacks,
1001       // execute them in top down order
1002       const osg::NodePath& np = hi->getNodePath();
1003       osg::NodePath::const_reverse_iterator npi;
1004       for (npi = np.rbegin(); npi != np.rend(); ++npi) {
1005         SGSceneUserData* ud = SGSceneUserData::getSceneUserData(*npi);
1006         if (!ud)
1007           continue;
1008         for (unsigned i = 0; i < ud->getNumPickCallbacks(); ++i) {
1009           SGPickCallback* pickCallback = ud->getPickCallback(i);
1010           if (!pickCallback)
1011             continue;
1012           SGSceneryPick sceneryPick;
1013           /// note that this is done totally in doubles instead of
1014           /// just using getWorldIntersectionPoint
1015           osg::Vec3d localPt = hi->getLocalIntersectPoint();
1016           sceneryPick.info.local = SGVec3d(localPt);
1017           if (hi->getMatrix())
1018             sceneryPick.info.wgs84 = SGVec3d(localPt*(*hi->getMatrix()));
1019           else
1020             sceneryPick.info.wgs84 = SGVec3d(localPt);
1021           sceneryPick.callback = pickCallback;
1022           pickList.push_back(sceneryPick);
1023         }
1024       }
1025     }
1026   }
1027
1028   return !pickList.empty();
1029 }
1030
1031 // end of renderer.cxx
1032