src/Aircraft/aircraft.cxx

   1 // aircraft.cxx -- various aircraft routines
   2 //
   3 // Written by Curtis Olson, started May 1997.
   4 //
   5 // Copyright (C) 1997  Curtis L. Olson  - http://www.flightgear.org/~curt
   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 // $Id$
  22
  23 #ifdef HAVE_CONFIG_H
  24 #  include "config.h"
  25 #endif
  26
  27 #include <cstdio>
  28 #include <cstring>              // strdup
  29
  30 #include <plib/ul.h>
  31
  32 #include <simgear/constants.h>
  33 #include <simgear/debug/logstream.hxx>
  34 #include <simgear/misc/sg_path.hxx>
  35 #include <simgear/structure/commands.hxx>
  36 #include <simgear/structure/exception.hxx>
  37 #include <simgear/sound/soundmgr_openal.hxx>
  38
  39 #include <Main/globals.hxx>
  40 #include <Main/fg_init.hxx>
  41 #include <Main/fg_props.hxx>
  42 #include <Main/viewmgr.hxx>
  43 #include <Cockpit/panel.hxx>
  44 #include <Cockpit/hud.hxx>
  45 #include <Cockpit/panel_io.hxx>
  46 #include <Model/acmodel.hxx>
  47
  48 #include "aircraft.hxx"
  49
  50
  51 // This is a record containing all the info for the aircraft currently
  52 // being operated
  53 fgAIRCRAFT current_aircraft;
  54
  55
  56 // Initialize an Aircraft structure
  57 void fgAircraftInit( void ) {
  58     SG_LOG( SG_AIRCRAFT, SG_INFO, "Initializing Aircraft structure" );
  59
  60     current_aircraft.fdm_state   = cur_fdm_state;
  61     current_aircraft.controls = globals->get_controls();
  62 }
  63
  64
  65 // Display various parameters to stdout
  66 void fgAircraftOutputCurrent(fgAIRCRAFT *a) {
  67     FGInterface *f;
  68
  69     f = a->fdm_state;
  70
  71     SG_LOG( SG_FLIGHT, SG_DEBUG,
  72             "Pos = ("
  73             << (f->get_Longitude() * 3600.0 * SGD_RADIANS_TO_DEGREES) << ","
  74             << (f->get_Latitude()  * 3600.0 * SGD_RADIANS_TO_DEGREES) << ","
  75             << f->get_Altitude()
  76             << ")  (Phi,Theta,Psi)=("
  77             << f->get_Phi() << ","
  78             << f->get_Theta() << ","
  79             << f->get_Psi() << ")" );
  80
  81     SG_LOG( SG_FLIGHT, SG_DEBUG,
  82             "Kts = " << f->get_V_equiv_kts()
  83             << "  Elev = " << globals->get_controls()->get_elevator()
  84             << "  Aileron = " << globals->get_controls()->get_aileron()
  85             << "  Rudder = " << globals->get_controls()->get_rudder()
  86             << "  Power = " << globals->get_controls()->get_throttle( 0 ) );
  87 }
  88
  89
  90 // Show available aircraft types
  91 void fgReadAircraft(void) {
  92
  93    // SGPropertyNode *aircraft_types = fgGetNode("/sim/aircraft-types", true);
  94
  95    SGPath path( globals->get_fg_root() );
  96    path.append("Aircraft");
  97
  98    ulDirEnt* dire;
  99    ulDir *dirp;
 100
 101    dirp = ulOpenDir(path.c_str());
 102    if (dirp == NULL) {
 103       SG_LOG( SG_AIRCRAFT, SG_ALERT, "Unable to open aircraft directory." );
 104       ulCloseDir(dirp);
 105       return;
 106    }
 107
 108    while ((dire = ulReadDir(dirp)) != NULL) {
 109       char *ptr;
 110
 111       if ((ptr = strstr(dire->d_name, "-set.xml")) && strlen(ptr) == 8) {
 112
 113           *ptr = '\0';
 114 #if 0
 115           SGPath afile = path;
 116           afile.append(dire->d_name);
 117
 118           SGPropertyNode root;
 119           try {
 120              readProperties(afile.str(), &root);
 121           } catch (...) {
 122              continue;
 123           }
 124
 125           SGPropertyNode *node = root.getNode("sim");
 126           if (node) {
 127              SGPropertyNode *desc = node->getNode("description");
 128
 129              if (desc) {
 130                  SGPropertyNode *aircraft =
 131                                 aircraft_types->getChild(dire->d_name, 0, true);
 132
 133                 aircraft->setStringValue(strdup(desc->getStringValue()));
 134              }
 135           }
 136 #endif
 137       }
 138    }
 139
 140    ulCloseDir(dirp);
 141
 142    globals->get_commands()->addCommand("load-aircraft", fgLoadAircraft);
 143 }
 144
 145 bool
 146 fgLoadAircraft (const SGPropertyNode * arg)
 147 {
 148     static const SGPropertyNode *master_freeze
 149         = fgGetNode("/sim/freeze/master");
 150
 151     bool freeze = master_freeze->getBoolValue();
 152     if ( !freeze ) {
 153         fgSetBool("/sim/freeze/master", true);
 154     }
 155
 156     // TODO:
 157     //    remove electrical system
 158     cur_fdm_state->unbind();
 159
 160     // Save the selected aircraft model since restoreInitialState
 161     // will obverwrite it.
 162     //
 163     string aircraft = fgGetString("/sim/aircraft", "");
 164     globals->restoreInitialState();
 165
 166     fgSetString("/sim/aircraft", aircraft.c_str());
 167     fgSetString("/sim/panel/path", "Aircraft/c172p/Panels/c172-vfr-panel.xml");
 168
 169     if ( aircraft.size() > 0 ) {
 170         SGPath aircraft_path(globals->get_fg_root());
 171         aircraft_path.append("Aircraft");
 172         aircraft_path.append(aircraft);
 173         aircraft_path.concat("-set.xml");
 174         SG_LOG(SG_INPUT, SG_INFO, "Reading default aircraft: " << aircraft
 175                << " from " << aircraft_path.str());
 176         try {
 177             readProperties(aircraft_path.str(), globals->get_props());
 178         } catch (const sg_exception &e) {
 179             string message = "Error reading default aircraft: ";
 180             message += e.getFormattedMessage();
 181             SG_LOG(SG_INPUT, SG_ALERT, message);
 182             exit(2);
 183         }
 184     } else {
 185         SG_LOG(SG_INPUT, SG_ALERT, "No default aircraft specified");
 186     }
 187
 188     // Initialize the (new) 2D panel.
 189     //
 190     string panel_path = fgGetString("/sim/panel/path",
 191                                     "Aircraft/c172p/Panels/c172-vfr-panel.xml");
 192
 193     FGPanel *panel = fgReadPanel(panel_path);
 194     if (panel == 0) {
 195         SG_LOG( SG_INPUT, SG_ALERT,
 196                 "Error reading new panel from " << panel_path );
 197     } else {
 198         SG_LOG( SG_INPUT, SG_INFO, "Loaded new panel from " << panel_path );
 199         globals->get_current_panel()->unbind();
 200         delete globals->get_current_panel();
 201         globals->set_current_panel( panel );
 202         globals->get_current_panel()->init();
 203         globals->get_current_panel()->bind();
 204         globals->get_current_panel()->update(0);
 205     }
 206
 207     // Load the new 3D model
 208     //
 209     globals->get_aircraft_model()->unbind();
 210     delete globals->get_aircraft_model();
 211     globals->set_aircraft_model(new FGAircraftModel);
 212     globals->get_aircraft_model()->init();
 213     globals->get_aircraft_model()->bind();
 214
 215     // TODO:
 216     //    load new electrical system
 217     //
 218
 219     // update our position based on current presets
 220     fgInitPosition();
 221
 222     // Update the HUD
 223     fgHUDInit(&current_aircraft);
 224
 225     SGTime *t = globals->get_time_params();
 226     delete t;
 227     t = fgInitTime();
 228     globals->set_time_params( t );
 229
 230     globals->get_viewmgr()->reinit();
 231     globals->get_controls()->reset_all();
 232     globals->get_aircraft_model()->reinit();
 233     globals->get_subsystem("xml-autopilot")->reinit();
 234
 235     fgReInitSubsystems();
 236
 237     if ( !freeze ) {
 238         fgSetBool("/sim/freeze/master", false);
 239     }
 240
 241     return true;
 242 }