src/Environment/environment_mgr.cxx

   1 // environment-mgr.cxx -- manager for natural environment information.
   2 //
   3 // Written by David Megginson, started February 2002.
   4 //
   5 // Copyright (C) 2002  David Megginson - david@megginson.com
   6 //
   7 // This program is free software; you can redistribute it and/or
   8 // modify it under the terms of the GNU General Public License as
   9 // published by the Free Software Foundation; either version 2 of the
  10 // License, or (at your option) any later version.
  11 //
  12 // This program is distributed in the hope that it will be useful, but
  13 // WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 // General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License
  18 // along with this program; if not, write to the Free Software
  19 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  20
  21 #ifdef HAVE_CONFIG_H
  22 #  include <config.h>
  23 #endif
  24
  25 #include <cstring>
  26
  27 #include <simgear/constants.h>
  28 #include <simgear/debug/logstream.hxx>
  29 #include <simgear/scene/sky/sky.hxx>
  30 #include <simgear/scene/model/particles.hxx>
  31
  32 #include <Main/main.hxx>
  33 #include <Main/fg_props.hxx>
  34 #include <FDM/flight.hxx>
  35
  36 #include "environment.hxx"
  37 #include "environment_mgr.hxx"
  38 #include "environment_ctrl.hxx"
  39 #include "realwx_ctrl.hxx"
  40 #include "fgclouds.hxx"
  41 #include "precipitation_mgr.hxx"
  42 #include "ridge_lift.hxx"
  43 #include "terrainsampler.hxx"
  44 #include "Airports/simple.hxx"
  45 #include "gravity.hxx"
  46
  47 class SGSky;
  48 extern SGSky *thesky;
  49
  50 class FG3DCloudsListener : public SGPropertyChangeListener {
  51 public:
  52   FG3DCloudsListener( FGClouds * fgClouds );
  53   virtual ~FG3DCloudsListener();
  54
  55   virtual void valueChanged (SGPropertyNode * node);
  56
  57 private:
  58   FGClouds * _fgClouds;
  59   SGPropertyNode_ptr _shaderNode;
  60   SGPropertyNode_ptr _enableNode;
  61 };
  62
  63 FG3DCloudsListener::FG3DCloudsListener( FGClouds * fgClouds ) :
  64     _fgClouds( fgClouds )
  65 {
  66   _shaderNode = fgGetNode( "/sim/rendering/shader-effects", true );
  67   _shaderNode->addChangeListener( this );
  68
  69   _enableNode = fgGetNode( "/sim/rendering/clouds3d-enable", true );
  70   _enableNode->addChangeListener( this );
  71
  72   valueChanged( _enableNode );
  73 }
  74
  75 FG3DCloudsListener::~FG3DCloudsListener()
  76 {
  77   _enableNode->removeChangeListener( this );
  78   _shaderNode->removeChangeListener( this );
  79 }
  80
  81 void FG3DCloudsListener::valueChanged( SGPropertyNode * node )
  82 {
  83   _fgClouds->set_3dClouds( _enableNode->getBoolValue() && _shaderNode->getBoolValue() );
  84 }
  85
  86 FGEnvironmentMgr::FGEnvironmentMgr () :
  87   _environment(new FGEnvironment()),
  88   fgClouds(new FGClouds()),
  89   _cloudLayersDirty(true),
  90   _altitude_n(fgGetNode("/position/altitude-ft", true)),
  91   _longitude_n(fgGetNode( "/position/longitude-deg", true )),
  92   _latitude_n( fgGetNode( "/position/latitude-deg", true )),
  93   _positionTimeToLive(0.0),
  94   _3dCloudsEnableListener(new FG3DCloudsListener(fgClouds) )
  95 {
  96   set_subsystem("controller", Environment::LayerInterpolateController::createInstance( fgGetNode("/environment/config", true ) ));
  97   set_subsystem("realwx", Environment::RealWxController::createInstance( fgGetNode("/environment/realwx", true ) ), 1.0 );
  98
  99   set_subsystem("precipitation", new FGPrecipitationMgr);
 100   set_subsystem("terrainsampler", Environment::TerrainSampler::createInstance( fgGetNode("/environment/terrain", true ) ));
 101   set_subsystem("ridgelift", new FGRidgeLift);
 102 }
 103
 104 FGEnvironmentMgr::~FGEnvironmentMgr ()
 105 {
 106   SGSubsystem * subsys;
 107
 108   subsys = get_subsystem( "ridgelift" );
 109   remove_subsystem( "ridgelift" );
 110   delete subsys;
 111
 112   subsys = get_subsystem( "terrainsampler" );
 113   remove_subsystem( "terrainsampler" );
 114   delete subsys;
 115
 116   subsys = get_subsystem( "precipitation" );
 117   remove_subsystem("precipitation");
 118   delete subsys;
 119
 120   subsys = get_subsystem("realwx");
 121   remove_subsystem("realwx");
 122   delete subsys;
 123
 124   subsys = get_subsystem("controller");
 125   remove_subsystem("controller");
 126   delete subsys;
 127
 128   delete fgClouds;
 129   delete _environment;
 130
 131   delete _3dCloudsEnableListener;
 132 }
 133
 134 void
 135 FGEnvironmentMgr::init ()
 136 {
 137   SG_LOG( SG_GENERAL, SG_INFO, "Initializing environment subsystem");
 138   SGSubsystemGroup::init();
 139   fgClouds->Init();
 140
 141   // FIXME: is this really part of the environment_mgr?
 142   // Initialize the longitude, latitude and altitude to the initial position
 143   // of the aircraft so that the atmospheric properties (pressure, temperature
 144   // and density) can be initialized accordingly.
 145   _altitude_n->setDoubleValue(fgGetDouble("/sim/presets/altitude-ft"));
 146   _longitude_n->setDoubleValue(fgGetDouble("/sim/presets/longitude-deg"));
 147   _latitude_n->setDoubleValue(fgGetDouble("/sim/presets/latitude-deg"));
 148 }
 149
 150 void
 151 FGEnvironmentMgr::reinit ()
 152 {
 153   SG_LOG( SG_GENERAL, SG_INFO, "Reinitializing environment subsystem");
 154   SGSubsystemGroup::reinit();
 155 }
 156
 157 void
 158 FGEnvironmentMgr::bind ()
 159 {
 160   SGSubsystemGroup::bind();
 161   _environment->Tie( fgGetNode("/environment", true ) );
 162
 163   _tiedProperties.setRoot( fgGetNode( "/environment", true ) );
 164
 165   _tiedProperties.Tie( "effective-visibility-m", thesky,
 166           &SGSky::get_visibility );
 167
 168   _tiedProperties.Tie("rebuild-layers", fgClouds,
 169           &FGClouds::get_update_event,
 170           &FGClouds::set_update_event);
 171
 172 //  _tiedProperties.Tie("turbulence/use-cloud-turbulence", &sgEnviro,
 173 //          &SGEnviro::get_turbulence_enable_state,
 174 //          &SGEnviro::set_turbulence_enable_state);
 175
 176   for (int i = 0; i < MAX_CLOUD_LAYERS; i++) {
 177       SGPropertyNode_ptr layerNode = fgGetNode("/environment/clouds",true)->getChild("layer", i, true );
 178
 179       _tiedProperties.Tie( layerNode->getNode("span-m",true), this, i,
 180               &FGEnvironmentMgr::get_cloud_layer_span_m,
 181               &FGEnvironmentMgr::set_cloud_layer_span_m);
 182
 183       _tiedProperties.Tie( layerNode->getNode("elevation-ft",true), this, i,
 184               &FGEnvironmentMgr::get_cloud_layer_elevation_ft,
 185               &FGEnvironmentMgr::set_cloud_layer_elevation_ft);
 186
 187       _tiedProperties.Tie( layerNode->getNode("thickness-ft",true), this, i,
 188               &FGEnvironmentMgr::get_cloud_layer_thickness_ft,
 189               &FGEnvironmentMgr::set_cloud_layer_thickness_ft);
 190
 191       _tiedProperties.Tie( layerNode->getNode("transition-ft",true), this, i,
 192               &FGEnvironmentMgr::get_cloud_layer_transition_ft,
 193               &FGEnvironmentMgr::set_cloud_layer_transition_ft);
 194
 195       _tiedProperties.Tie( layerNode->getNode("coverage",true), this, i,
 196               &FGEnvironmentMgr::get_cloud_layer_coverage,
 197               &FGEnvironmentMgr::set_cloud_layer_coverage);
 198
 199       _tiedProperties.Tie( layerNode->getNode("coverage-type",true), this, i,
 200               &FGEnvironmentMgr::get_cloud_layer_coverage_type,
 201               &FGEnvironmentMgr::set_cloud_layer_coverage_type);
 202
 203       _tiedProperties.Tie( layerNode->getNode( "visibility-m",true), this, i,
 204               &FGEnvironmentMgr::get_cloud_layer_visibility_m,
 205               &FGEnvironmentMgr::set_cloud_layer_visibility_m);
 206
 207       _tiedProperties.Tie( layerNode->getNode( "alpha",true), this, i,
 208               &FGEnvironmentMgr::get_cloud_layer_maxalpha,
 209               &FGEnvironmentMgr::set_cloud_layer_maxalpha);
 210   }
 211
 212   _tiedProperties.setRoot( fgGetNode("/sim/rendering", true ) );
 213
 214   _tiedProperties.Tie( "clouds3d-density", thesky,
 215           &SGSky::get_3dCloudDensity,
 216           &SGSky::set_3dCloudDensity);
 217
 218   _tiedProperties.Tie("clouds3d-vis-range", thesky,
 219           &SGSky::get_3dCloudVisRange,
 220           &SGSky::set_3dCloudVisRange);
 221
 222 //  _tiedProperties.Tie("lightning-enable", &sgEnviro,
 223 //          &SGEnviro::get_lightning_enable_state,
 224 //          &SGEnviro::set_lightning_enable_state);
 225
 226 }
 227
 228 void
 229 FGEnvironmentMgr::unbind ()
 230 {
 231   _tiedProperties.Untie();
 232   _environment->Untie();
 233   SGSubsystemGroup::unbind();
 234 }
 235
 236 void
 237 FGEnvironmentMgr::update (double dt)
 238 {
 239   SGSubsystemGroup::update(dt);
 240
 241   _environment->set_elevation_ft( _altitude_n->getDoubleValue() );
 242
 243   simgear::Particles::setWindFrom( _environment->get_wind_from_heading_deg(),
 244                                    _environment->get_wind_speed_kt() );
 245   if( _cloudLayersDirty ) {
 246     _cloudLayersDirty = false;
 247     fgClouds->set_update_event( fgClouds->get_update_event()+1 );
 248   }
 249
 250
 251   fgSetDouble( "/environment/gravitational-acceleration-mps2",
 252     Environment::Gravity::instance()->getGravity(SGGeod::fromDegFt(
 253       _longitude_n->getDoubleValue(),
 254       _latitude_n->getDoubleValue(),
 255       _altitude_n->getDoubleValue()
 256   )));
 257
 258   _positionTimeToLive -= dt;
 259   if( _positionTimeToLive <= 0.0 )
 260   {
 261       // update closest airport information
 262       _positionTimeToLive = 30.0;
 263
 264       SG_LOG(SG_ALL, SG_INFO, "FGEnvironmentMgr::update: updating closest airport");
 265
 266       SGGeod pos = SGGeod::fromDeg(_longitude_n->getDoubleValue(),
 267                                    _latitude_n->getDoubleValue());
 268
 269       FGAirport * nearestAirport = FGAirport::findClosest(pos, 100.0);
 270       if( nearestAirport == NULL )
 271       {
 272           SG_LOG(SG_ALL,SG_WARN,"FGEnvironmentMgr::update: No airport within 100NM range");
 273       }
 274       else
 275       {
 276           const string currentId = fgGetString("/sim/airport/closest-airport-id", "");
 277           if (currentId != nearestAirport->ident())
 278           {
 279               fgSetString("/sim/airport/closest-airport-id",
 280                       nearestAirport->ident().c_str());
 281           }
 282       }
 283   }
 284 }
 285
 286 FGEnvironment
 287 FGEnvironmentMgr::getEnvironment () const
 288 {
 289   return *_environment;
 290 }
 291
 292 FGEnvironment
 293 FGEnvironmentMgr::getEnvironment (double lat, double lon, double alt) const
 294 {
 295   // Always returns the same environment
 296   // for now; we'll make it interesting
 297   // later.
 298   FGEnvironment env = *_environment;
 299   env.set_elevation_ft(alt);
 300   return env;
 301 }
 302
 303 FGEnvironment
 304 FGEnvironmentMgr::getEnvironment(const SGGeod& aPos) const
 305 {
 306   // Always returns the same environment
 307   // for now; we'll make it interesting
 308   // later.
 309   FGEnvironment env = *_environment;
 310   env.set_elevation_ft(aPos.getElevationFt());
 311   return env;
 312
 313 }
 314
 315 double
 316 FGEnvironmentMgr::get_cloud_layer_span_m (int index) const
 317 {
 318   return thesky->get_cloud_layer(index)->getSpan_m();
 319 }
 320
 321 void
 322 FGEnvironmentMgr::set_cloud_layer_span_m (int index, double span_m)
 323 {
 324   thesky->get_cloud_layer(index)->setSpan_m(span_m);
 325 }
 326
 327 double
 328 FGEnvironmentMgr::get_cloud_layer_elevation_ft (int index) const
 329 {
 330   return thesky->get_cloud_layer(index)->getElevation_m() * SG_METER_TO_FEET;
 331 }
 332
 333 void
 334 FGEnvironmentMgr::set_cloud_layer_elevation_ft (int index, double elevation_ft)
 335 {
 336   FGEnvironment env = *_environment;
 337   env.set_elevation_ft(elevation_ft);
 338
 339   thesky->get_cloud_layer(index)
 340     ->setElevation_m(elevation_ft * SG_FEET_TO_METER);
 341
 342   thesky->get_cloud_layer(index)
 343     ->setSpeed(env.get_wind_speed_kt() * 0.5151);       // 1 kt = 0.5151 m/s
 344
 345   thesky->get_cloud_layer(index)
 346     ->setDirection(env.get_wind_from_heading_deg());
 347 }
 348
 349 double
 350 FGEnvironmentMgr::get_cloud_layer_thickness_ft (int index) const
 351 {
 352   return thesky->get_cloud_layer(index)->getThickness_m() * SG_METER_TO_FEET;
 353 }
 354
 355 void
 356 FGEnvironmentMgr::set_cloud_layer_thickness_ft (int index, double thickness_ft)
 357 {
 358   thesky->get_cloud_layer(index)
 359     ->setThickness_m(thickness_ft * SG_FEET_TO_METER);
 360 }
 361
 362 double
 363 FGEnvironmentMgr::get_cloud_layer_transition_ft (int index) const
 364 {
 365   return thesky->get_cloud_layer(index)->getTransition_m() * SG_METER_TO_FEET;
 366 }
 367
 368 void
 369 FGEnvironmentMgr::set_cloud_layer_transition_ft (int index,
 370                                                  double transition_ft)
 371 {
 372   thesky->get_cloud_layer(index)
 373     ->setTransition_m(transition_ft * SG_FEET_TO_METER);
 374 }
 375
 376 const char *
 377 FGEnvironmentMgr::get_cloud_layer_coverage (int index) const
 378 {
 379   return thesky->get_cloud_layer(index)->getCoverageString().c_str();
 380 }
 381
 382 void
 383 FGEnvironmentMgr::set_cloud_layer_coverage (int index,
 384                                             const char * coverage_name)
 385 {
 386   if( thesky->get_cloud_layer(index)->getCoverageString() == coverage_name )
 387     return;
 388
 389   thesky->get_cloud_layer(index)->setCoverageString(coverage_name);
 390   _cloudLayersDirty = true;
 391 }
 392
 393 int
 394 FGEnvironmentMgr::get_cloud_layer_coverage_type (int index) const
 395 {
 396   return thesky->get_cloud_layer(index)->getCoverage();
 397 }
 398
 399 double
 400 FGEnvironmentMgr::get_cloud_layer_visibility_m (int index) const
 401 {
 402     return thesky->get_cloud_layer(index)->getVisibility_m();
 403 }
 404
 405 void
 406 FGEnvironmentMgr::set_cloud_layer_visibility_m (int index, double visibility_m)
 407 {
 408     thesky->get_cloud_layer(index)->setVisibility_m(visibility_m);
 409 }
 410
 411 double
 412 FGEnvironmentMgr::get_cloud_layer_maxalpha (int index ) const
 413 {
 414     return thesky->get_cloud_layer(index)->getMaxAlpha();
 415 }
 416
 417 void
 418 FGEnvironmentMgr::set_cloud_layer_maxalpha (int index, double maxalpha)
 419 {
 420     thesky->get_cloud_layer(index)->setMaxAlpha(maxalpha);
 421 }
 422
 423 void
 424 FGEnvironmentMgr::set_cloud_layer_coverage_type (int index, int type )
 425 {
 426   if( type < 0 || type >= SGCloudLayer::SG_MAX_CLOUD_COVERAGES ) {
 427     SG_LOG(SG_ALL,SG_WARN,"Unknown cloud layer type " << type << " ignored" );
 428     return;
 429   }
 430
 431   if( static_cast<SGCloudLayer::Coverage>(type) == thesky->get_cloud_layer(index)->getCoverage() )
 432     return;
 433
 434   thesky->get_cloud_layer(index)->setCoverage(static_cast<SGCloudLayer::Coverage>(type));
 435   _cloudLayersDirty = true;
 436 }
 437
 438
 439 // end of environment-mgr.cxx