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