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 <stdio.h>
  28 #include <string.h>             // 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
  38 #include <Main/globals.hxx>
  39 #include <Main/fg_props.hxx>
  40 #include <Main/viewmgr.hxx>
  41 #include <Cockpit/panel.hxx>
  42 #include <Cockpit/hud.hxx>
  43 #include <Cockpit/panel_io.hxx>
  44 #include <Model/acmodel.hxx>
  45
  46 #include "aircraft.hxx"
  47
  48
  49 // This is a record containing all the info for the aircraft currently
  50 // being operated
  51 fgAIRCRAFT current_aircraft;
  52
  53
  54 // Initialize an Aircraft structure
  55 void fgAircraftInit( void ) {
  56     SG_LOG( SG_AIRCRAFT, SG_INFO, "Initializing Aircraft structure" );
  57
  58     current_aircraft.fdm_state   = cur_fdm_state;
  59     current_aircraft.controls = globals->get_controls();
  60 }
  61
  62
  63 // Display various parameters to stdout
  64 void fgAircraftOutputCurrent(fgAIRCRAFT *a) {
  65     FGInterface *f;
  66
  67     f = a->fdm_state;
  68
  69     SG_LOG( SG_FLIGHT, SG_DEBUG,
  70             "Pos = ("
  71             << (f->get_Longitude() * 3600.0 * SGD_RADIANS_TO_DEGREES) << ","
  72             << (f->get_Latitude()  * 3600.0 * SGD_RADIANS_TO_DEGREES) << ","
  73             << f->get_Altitude()
  74             << ")  (Phi,Theta,Psi)=("
  75             << f->get_Phi() << ","
  76             << f->get_Theta() << ","
  77             << f->get_Psi() << ")" );
  78
  79     SG_LOG( SG_FLIGHT, SG_DEBUG,
  80             "Kts = " << f->get_V_equiv_kts()
  81             << "  Elev = " << globals->get_controls()->get_elevator()
  82             << "  Aileron = " << globals->get_controls()->get_aileron()
  83             << "  Rudder = " << globals->get_controls()->get_rudder()
  84             << "  Power = " << globals->get_controls()->get_throttle( 0 ) );
  85 }
  86
  87
  88 // Show available aircraft types
  89 void fgReadAircraft(void) {
  90
  91    // SGPropertyNode *aircraft_types = fgGetNode("/sim/aircraft-types", true);
  92
  93    SGPath path( globals->get_fg_root() );
  94    path.append("Aircraft");
  95
  96    ulDirEnt* dire;
  97    ulDir *dirp;
  98
  99    dirp = ulOpenDir(path.c_str());
 100    if (dirp == NULL) {
 101       SG_LOG( SG_AIRCRAFT, SG_ALERT, "Unable to open aircraft directory." );
 102       ulCloseDir(dirp);
 103       return;
 104    }
 105
 106    while ((dire = ulReadDir(dirp)) != NULL) {
 107       char *ptr;
 108
 109       if ((ptr = strstr(dire->d_name, "-set.xml")) && strlen(ptr) == 8) {
 110
 111           *ptr = '\0';
 112 #if 0
 113           SGPath afile = path;
 114           afile.append(dire->d_name);
 115
 116           SGPropertyNode root;
 117           try {
 118              readProperties(afile.str(), &root);
 119           } catch (...) {
 120              continue;
 121           }
 122
 123           SGPropertyNode *node = root.getNode("sim");
 124           if (node) {
 125              SGPropertyNode *desc = node->getNode("description");
 126
 127              if (desc) {
 128                  SGPropertyNode *aircraft =
 129                                 aircraft_types->getChild(dire->d_name, 0, true);
 130
 131                 aircraft->setStringValue(strdup(desc->getStringValue()));
 132              }
 133           }
 134 #endif
 135       }
 136    }
 137
 138    ulCloseDir(dirp);
 139
 140    globals->get_commands()->addCommand("load-aircraft", fgLoadAircraft);
 141 }
 142
 143 bool
 144 fgLoadAircraft (const SGPropertyNode * arg)
 145 {
 146     static const SGPropertyNode *master_freeze
 147         = fgGetNode("/sim/freeze/master");
 148
 149     bool freeze = master_freeze->getBoolValue();
 150     if ( !freeze ) {
 151         fgSetBool("/sim/freeze/master", true);
 152     }
 153
 154     // TODO:
 155     //    remove electrical system
 156     cur_fdm_state->unbind();
 157
 158     // Save the selected aircraft model since restoreInitialState
 159     // will obverwrite it.
 160     //
 161     string aircraft = fgGetString("/sim/aircraft", "");
 162     globals->restoreInitialState();
 163
 164     fgSetString("/sim/aircraft", aircraft.c_str());
 165     fgSetString("/sim/panel/path", "Aircraft/c172p/Panels/c172-vfr-panel.xml");
 166
 167     if ( aircraft.size() > 0 ) {
 168         SGPath aircraft_path(globals->get_fg_root());
 169         aircraft_path.append("Aircraft");
 170         aircraft_path.append(aircraft);
 171         aircraft_path.concat("-set.xml");
 172         SG_LOG(SG_INPUT, SG_INFO, "Reading default aircraft: " << aircraft
 173                << " from " << aircraft_path.str());
 174         try {
 175             readProperties(aircraft_path.str(), globals->get_props());
 176         } catch (const sg_exception &e) {
 177             string message = "Error reading default aircraft: ";
 178             message += e.getFormattedMessage();
 179             SG_LOG(SG_INPUT, SG_ALERT, message);
 180             exit(2);
 181         }
 182     } else {
 183         SG_LOG(SG_INPUT, SG_ALERT, "No default aircraft specified");
 184     }
 185
 186     // Initialize the (new) 2D panel.
 187     //
 188     string panel_path = fgGetString("/sim/panel/path",
 189                                     "Aircraft/c172p/Panels/c172-vfr-panel.xml");
 190
 191     FGPanel *panel = fgReadPanel(panel_path);
 192     if (panel == 0) {
 193         SG_LOG( SG_INPUT, SG_ALERT,
 194                 "Error reading new panel from " << panel_path );
 195     } else {
 196         SG_LOG( SG_INPUT, SG_INFO, "Loaded new panel from " << panel_path );
 197         globals->get_current_panel()->unbind();
 198         delete globals->get_current_panel();
 199         globals->set_current_panel( panel );
 200         globals->get_current_panel()->init();
 201         globals->get_current_panel()->bind();
 202         globals->get_current_panel()->update(0);
 203     }
 204
 205     // Load the new 3D model
 206     //
 207     globals->get_aircraft_model()->unbind();
 208     delete globals->get_aircraft_model();
 209     globals->set_aircraft_model(new FGAircraftModel);
 210     globals->get_aircraft_model()->init();
 211     globals->get_aircraft_model()->bind();
 212
 213     // TODO:
 214     //    load new electrical system
 215     //
 216
 217     // update our position based on current presets
 218     fgInitPosition();
 219
 220     // Update the HUD
 221     fgHUDInit(&current_aircraft);
 222
 223     SGTime *t = globals->get_time_params();
 224     delete t;
 225     t = fgInitTime();
 226     globals->set_time_params( t );
 227
 228     // Reinitialize some subsystems
 229     //
 230     globals->get_viewmgr()->reinit();
 231     globals->get_controls()->reset_all();
 232     globals->get_aircraft_model()->reinit();
 233     globals->get_subsystem("fx")->reinit();
 234     globals->get_subsystem("xml-autopilot")->reinit();
 235
 236     fgReInitSubsystems();
 237
 238     if ( !freeze ) {
 239         fgSetBool("/sim/freeze/master", false);
 240     }
 241
 242     return true;
 243 }