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., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 //
  21 // $Id$
  22
  23 #include <simgear/debug/logstream.hxx>
  24
  25 #include <Main/fg_props.hxx>
  26 #include <Aircraft/aircraft.hxx>
  27
  28 #include "environment.hxx"
  29 #include "environment_ctrl.hxx"
  30 #include "environment_mgr.hxx"
  31
  32
  33 FGEnvironmentMgr::FGEnvironmentMgr ()
  34   : _environment(new FGEnvironment),
  35     _controller(new FGUserDefEnvironmentCtrl)
  36 {
  37 }
  38
  39 FGEnvironmentMgr::~FGEnvironmentMgr ()
  40 {
  41   delete _environment;
  42   delete _controller;
  43 }
  44
  45 void
  46 FGEnvironmentMgr::init ()
  47 {
  48   SG_LOG( SG_GENERAL, SG_INFO, "Initializing environment subsystem");
  49   _controller->setEnvironment(_environment);
  50   _controller->init();
  51   _update_fdm();
  52 }
  53
  54 void
  55 FGEnvironmentMgr::bind ()
  56 {
  57   fgTie("/environment/visibility-m", _environment,
  58         &FGEnvironment::get_visibility_m, &FGEnvironment::set_visibility_m);
  59   fgSetArchivable("/environment/visibility-m");
  60   fgTie("/environment/temperature-sea-level-degc", _environment,
  61         &FGEnvironment::get_temperature_sea_level_degc,
  62         &FGEnvironment::set_temperature_sea_level_degc);
  63   fgSetArchivable("/environment/temperature-sea-level-degc");
  64   fgTie("/environment/temperature-degc", _environment,
  65         &FGEnvironment::get_temperature_degc,
  66         &FGEnvironment::set_temperature_degc);
  67   fgSetArchivable("/environment/temperature-degc");
  68   fgTie("/environment/pressure-sea-level-inhg", _environment,
  69         &FGEnvironment::get_pressure_sea_level_inhg,
  70         &FGEnvironment::set_pressure_sea_level_inhg);
  71   fgSetArchivable("/environment/pressure-sea-level-inhg");
  72   fgTie("/environment/pressure-inhg", _environment,
  73         &FGEnvironment::get_pressure_inhg,
  74         &FGEnvironment::set_pressure_inhg);
  75   fgSetArchivable("/environment/pressure-inhg");
  76   fgTie("/environment/density-sea-level-slugft3", _environment,
  77         &FGEnvironment::get_density_sea_level_slugft3,
  78         &FGEnvironment::set_density_sea_level_slugft3);
  79   fgSetArchivable("/environment/density-sea-level-slugft3");
  80   fgTie("/environment/density-slugft3", _environment,
  81         &FGEnvironment::get_density_slugft3,
  82         &FGEnvironment::set_density_slugft3);
  83   fgSetArchivable("/environment/density-inhg");
  84   fgTie("/environment/wind-from-heading-deg", _environment,
  85         &FGEnvironment::get_wind_from_heading_deg,
  86         &FGEnvironment::set_wind_from_heading_deg);
  87   fgTie("/environment/wind-speed-kt", _environment,
  88         &FGEnvironment::get_wind_speed_kt, &FGEnvironment::set_wind_speed_kt);
  89   fgTie("/environment/wind-from-north-fps", _environment,
  90         &FGEnvironment::get_wind_from_north_fps,
  91         &FGEnvironment::set_wind_from_north_fps);
  92   fgSetArchivable("/environment/wind-from-north-fps");
  93   fgTie("/environment/wind-from-east-fps", _environment,
  94         &FGEnvironment::get_wind_from_east_fps,
  95         &FGEnvironment::set_wind_from_east_fps);
  96   fgSetArchivable("/environment/wind-from-east-fps");
  97   fgTie("/environment/wind-from-down-fps", _environment,
  98         &FGEnvironment::get_wind_from_down_fps,
  99         &FGEnvironment::set_wind_from_down_fps);
 100   fgSetArchivable("/environment/wind-from-down-fps");
 101 }
 102
 103 void
 104 FGEnvironmentMgr::unbind ()
 105 {
 106   fgUntie("/environment/visibility-m");
 107   fgUntie("/environment/wind-from-heading-deg");
 108   fgUntie("/environment/wind-speed-kt");
 109   fgUntie("/environment/wind-from-north-fps");
 110   fgUntie("/environment/wind-from-east-fps");
 111   fgUntie("/environment/wind-from-down-fps");
 112 }
 113
 114 void
 115 FGEnvironmentMgr::update (double dt)
 116 {
 117   _controller->update(dt);
 118                                 // FIXME: the FDMs should update themselves
 119   current_aircraft.fdm_state
 120     ->set_Velocities_Local_Airmass(_environment->get_wind_from_north_fps(),
 121                                    _environment->get_wind_from_east_fps(),
 122                                    _environment->get_wind_from_down_fps());
 123   _environment->set_elevation_ft(fgGetDouble("/position/altitude-ft"));
 124
 125   _update_fdm();
 126 }
 127
 128 FGEnvironment
 129 FGEnvironmentMgr::getEnvironment () const
 130 {
 131   return *_environment;
 132 }
 133
 134 FGEnvironment
 135 FGEnvironmentMgr::getEnvironment (double lat, double lon, double alt) const
 136 {
 137                                 // Always returns the same environment
 138                                 // for now; we'll make it interesting
 139                                 // later.
 140   FGEnvironment env = *_environment;
 141   env.set_elevation_ft(alt);
 142   return env;
 143 }
 144
 145 void
 146 FGEnvironmentMgr::_update_fdm () const
 147 {
 148   //
 149   // Pass atmosphere on to FDM
 150   // FIXME: have FDMs read properties directly.
 151   //
 152   if (fgGetBool("/environment/params/control-fdm-atmosphere")) {
 153                                 // convert from Rankine to Celsius
 154     cur_fdm_state
 155       ->set_Static_temperature((9.0/5.0)
 156                                * _environment->get_temperature_degc() + 492.0);
 157                                 // convert from inHG to PSF
 158     cur_fdm_state
 159       ->set_Static_pressure(_environment->get_pressure_inhg() * 70.726566);
 160                                 // keep in slugs/ft^3
 161     cur_fdm_state
 162       ->set_Density(_environment->get_density_slugft3());
 163   }
 164 }
 165
 166 // end of environment-mgr.cxx