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
  38 #include <Main/globals.hxx>
  39 #include <Main/fg_init.hxx>
  40 #include <Main/fg_props.hxx>
  41 #include <Main/viewmgr.hxx>
  42 #include <Cockpit/panel.hxx>
  43 #include <Cockpit/hud.hxx>
  44 #include <Cockpit/panel_io.hxx>
  45 #include <Model/acmodel.hxx>
  46
  47 #include "aircraft.hxx"
  48
  49
  50 // This is a record containing all the info for the aircraft currently
  51 // being operated
  52 fgAIRCRAFT current_aircraft;
  53
  54
  55 // Initialize an Aircraft structure
  56 void fgAircraftInit( void ) {
  57     SG_LOG( SG_AIRCRAFT, SG_INFO, "Initializing Aircraft structure" );
  58
  59     current_aircraft.fdm_state   = cur_fdm_state;
  60     current_aircraft.controls = globals->get_controls();
  61 }
  62
  63
  64 // Display various parameters to stdout
  65 void fgAircraftOutputCurrent(fgAIRCRAFT *a) {
  66     FGInterface *f;
  67
  68     f = a->fdm_state;
  69
  70     SG_LOG( SG_FLIGHT, SG_DEBUG,
  71             "Pos = ("
  72             << (f->get_Longitude() * 3600.0 * SGD_RADIANS_TO_DEGREES) << ","
  73             << (f->get_Latitude()  * 3600.0 * SGD_RADIANS_TO_DEGREES) << ","
  74             << f->get_Altitude()
  75             << ")  (Phi,Theta,Psi)=("
  76             << f->get_Phi() << ","
  77             << f->get_Theta() << ","
  78             << f->get_Psi() << ")" );
  79
  80     SG_LOG( SG_FLIGHT, SG_DEBUG,
  81             "Kts = " << f->get_V_equiv_kts()
  82             << "  Elev = " << globals->get_controls()->get_elevator()
  83             << "  Aileron = " << globals->get_controls()->get_aileron()
  84             << "  Rudder = " << globals->get_controls()->get_rudder()
  85             << "  Power = " << globals->get_controls()->get_throttle( 0 ) );
  86 }
  87
  88
  89 // Show available aircraft types
  90 void fgReadAircraft(void) {
  91
  92    // SGPropertyNode *aircraft_types = fgGetNode("/sim/aircraft-types", true);
  93
  94    SGPath path( globals->get_fg_root() );
  95    path.append("Aircraft");
  96
  97    ulDirEnt* dire;
  98    ulDir *dirp;
  99
 100    dirp = ulOpenDir(path.c_str());
 101    if (dirp == NULL) {
 102       SG_LOG( SG_AIRCRAFT, SG_ALERT, "Unable to open aircraft directory." );
 103       ulCloseDir(dirp);
 104       return;
 105    }
 106
 107    while ((dire = ulReadDir(dirp)) != NULL) {
 108       char *ptr;
 109
 110       if ((ptr = strstr(dire->d_name, "-set.xml")) && strlen(ptr) == 8) {
 111
 112           *ptr = '\0';
 113 #if 0
 114           SGPath afile = path;
 115           afile.append(dire->d_name);
 116
 117           SGPropertyNode root;
 118           try {
 119              readProperties(afile.str(), &root);
 120           } catch (...) {
 121              continue;
 122           }
 123
 124           SGPropertyNode *node = root.getNode("sim");
 125           if (node) {
 126              SGPropertyNode *desc = node->getNode("description");
 127
 128              if (desc) {
 129                  SGPropertyNode *aircraft =
 130                                 aircraft_types->getChild(dire->d_name, 0, true);
 131
 132                 aircraft->setStringValue(strdup(desc->getStringValue()));
 133              }
 134           }
 135 #endif
 136       }
 137    }
 138
 139    ulCloseDir(dirp);
 140
 141    globals->get_commands()->addCommand("load-aircraft", fgLoadAircraft);
 142 }
 143
 144 bool
 145 fgLoadAircraft (const SGPropertyNode * arg)
 146 {
 147     static const SGPropertyNode *master_freeze
 148         = fgGetNode("/sim/freeze/master");
 149
 150     bool freeze = master_freeze->getBoolValue();
 151     if ( !freeze ) {
 152         fgSetBool("/sim/freeze/master", true);
 153     }
 154
 155     // TODO:
 156     //    remove electrical system
 157     cur_fdm_state->unbind();
 158
 159     // Save the selected aircraft model since restoreInitialState
 160     // will obverwrite it.
 161     //
 162     string aircraft = fgGetString("/sim/aircraft", "");
 163     globals->restoreInitialState();
 164
 165     fgSetString("/sim/aircraft", aircraft.c_str());
 166     fgSetString("/sim/panel/path", "Aircraft/c172p/Panels/c172-vfr-panel.xml");
 167
 168     if ( aircraft.size() > 0 ) {
 169         SGPath aircraft_path(globals->get_fg_root());
 170         aircraft_path.append("Aircraft");
 171         aircraft_path.append(aircraft);
 172         aircraft_path.concat("-set.xml");
 173         SG_LOG(SG_INPUT, SG_INFO, "Reading default aircraft: " << aircraft
 174                << " from " << aircraft_path.str());
 175         try {
 176             readProperties(aircraft_path.str(), globals->get_props());
 177         } catch (const sg_exception &e) {
 178             string message = "Error reading default aircraft: ";
 179             message += e.getFormattedMessage();
 180             SG_LOG(SG_INPUT, SG_ALERT, message);
 181             exit(2);
 182         }
 183     } else {
 184         SG_LOG(SG_INPUT, SG_ALERT, "No default aircraft specified");
 185     }
 186
 187     // Initialize the (new) 2D panel.
 188     //
 189     string panel_path = fgGetString("/sim/panel/path",
 190                                     "Aircraft/c172p/Panels/c172-vfr-panel.xml");
 191
 192     FGPanel *panel = fgReadPanel(panel_path);
 193     if (panel == 0) {
 194         SG_LOG( SG_INPUT, SG_ALERT,
 195                 "Error reading new panel from " << panel_path );
 196     } else {
 197         SG_LOG( SG_INPUT, SG_INFO, "Loaded new panel from " << panel_path );
 198         globals->get_current_panel()->unbind();
 199         delete globals->get_current_panel();
 200         globals->set_current_panel( panel );
 201         globals->get_current_panel()->init();
 202         globals->get_current_panel()->bind();
 203         globals->get_current_panel()->update(0);
 204     }
 205
 206     // Load the new 3D model
 207     //
 208     globals->get_aircraft_model()->unbind();
 209     delete globals->get_aircraft_model();
 210     globals->set_aircraft_model(new FGAircraftModel);
 211     globals->get_aircraft_model()->init();
 212     globals->get_aircraft_model()->bind();
 213
 214     // TODO:
 215     //    load new electrical system
 216     //
 217
 218     // update our position based on current presets
 219     fgInitPosition();
 220
 221     // Update the HUD
 222     fgHUDInit(&current_aircraft);
 223
 224     SGTime *t = globals->get_time_params();
 225     delete t;
 226     t = fgInitTime();
 227     globals->set_time_params( t );
 228
 229     // Reinitialize some subsystems
 230     //
 231     globals->get_viewmgr()->reinit();
 232     globals->get_controls()->reset_all();
 233     globals->get_aircraft_model()->reinit();
 234     globals->get_subsystem("fx")->reinit();
 235     globals->get_subsystem("xml-autopilot")->reinit();
 236
 237     fgReInitSubsystems();
 238
 239     if ( !freeze ) {
 240         fgSetBool("/sim/freeze/master", false);
 241     }
 242
 243     return true;
 244 }