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