src/Main/keyboard.cxx

   1 // keyboard.cxx -- handle GLUT keyboard events
   2 //
   3 // Written by Curtis Olson, started May 1997.
   4 //
   5 // Copyright (C) 1997 - 1999  Curtis L. Olson  - curt@flightgear.org
   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 #ifdef HAVE_CONFIG_H
  25 #  include <config.h>
  26 #endif
  27
  28 #ifdef HAVE_WINDOWS_H
  29 #  include <windows.h>
  30 #endif
  31
  32 #include <simgear/compiler.h>
  33
  34 #include <GL/glut.h>
  35 #include <simgear/xgl/xgl.h>
  36
  37 #if defined(FX) && defined(XMESA)
  38 #include <GL/xmesa.h>
  39 #endif
  40
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43
  44 #include STL_FSTREAM
  45
  46 #include <plib/pu.h>            // plib include
  47
  48 #include <simgear/constants.h>
  49 #include <simgear/debug/logstream.hxx>
  50 #include <simgear/misc/fgpath.hxx>
  51
  52 #include <Aircraft/aircraft.hxx>
  53 #include <Autopilot/auto_gui.hxx>
  54 #include <Autopilot/newauto.hxx>
  55 #include <Cockpit/hud.hxx>
  56 #include <Cockpit/panel.hxx>
  57 #include <Cockpit/panel_io.hxx>
  58 #include <GUI/gui.h>
  59 #include <Scenery/tilemgr.hxx>
  60 #include <Objects/matlib.hxx>
  61 #include <Time/light.hxx>
  62 #include <Time/tmp.hxx>
  63
  64 #ifndef FG_OLD_WEATHER
  65 #  include <WeatherCM/FGLocalWeatherDatabase.h>
  66 #else
  67 #  include <Weather/weather.hxx>
  68 #endif
  69
  70 #include "bfi.hxx"
  71 #include "globals.hxx"
  72 #include "keyboard.hxx"
  73 #include "options.hxx"
  74 #include "save.hxx"
  75 #include "views.hxx"
  76
  77                                 // From main.cxx
  78 extern void fgReshape( int width, int height );
  79
  80
  81 // Handle keyboard events
  82 void GLUTkey(unsigned char k, int x, int y) {
  83     FGInterface *f;
  84     SGTime *t;
  85     FGView *v;
  86     float fov, tmp;
  87     static bool winding_ccw = true;
  88     int speed;
  89
  90     f = current_aircraft.fdm_state;
  91     v = &current_view;
  92
  93     FG_LOG( FG_INPUT, FG_DEBUG, "Key hit = " << k );
  94     if ( puKeyboard(k, PU_DOWN) ) {
  95         return;
  96     }
  97
  98     if ( GLUT_ACTIVE_ALT && glutGetModifiers() ) {
  99         FG_LOG( FG_INPUT, FG_DEBUG, " SHIFTED" );
 100         switch (k) {
 101         case 1: // Ctrl-A key
 102             current_autopilot->set_AltitudeMode(
 103                   FGAutopilot::FG_ALTITUDE_LOCK );
 104             current_autopilot->set_AltitudeEnabled(
 105                   ! current_autopilot->get_AltitudeEnabled()
 106                 );
 107             return;
 108         case 7: // Ctrl-G key
 109             current_autopilot->set_AltitudeMode(
 110                   FGAutopilot::FG_ALTITUDE_GS1 );
 111             current_autopilot->set_AltitudeEnabled(
 112                   ! current_autopilot->get_AltitudeEnabled()
 113                 );
 114             return;
 115         case 8: // Ctrl-H key
 116             current_autopilot->set_HeadingMode(
 117                   FGAutopilot::FG_HEADING_LOCK );
 118             current_autopilot->set_HeadingEnabled(
 119                   ! current_autopilot->get_HeadingEnabled()
 120                 );
 121             return;
 122         case 14: // Ctrl-N key
 123             current_autopilot->set_HeadingMode(
 124                   FGAutopilot::FG_HEADING_NAV1 );
 125             current_autopilot->set_HeadingEnabled(
 126                   ! current_autopilot->get_HeadingEnabled()
 127                 );
 128             return;
 129         case 18: // Ctrl-R key
 130             // temporary
 131             winding_ccw = !winding_ccw;
 132             if ( winding_ccw ) {
 133                 glFrontFace ( GL_CCW );
 134             } else {
 135                 glFrontFace ( GL_CW );
 136             }
 137             return;
 138         case 19: // Ctrl-S key
 139             current_autopilot->set_AutoThrottleEnabled(
 140                   ! current_autopilot->get_AutoThrottleEnabled()
 141                 );
 142             return;
 143         case 20: // Ctrl-T key
 144             current_autopilot->set_AltitudeMode(
 145                   FGAutopilot::FG_ALTITUDE_TERRAIN );
 146             current_autopilot->set_AltitudeEnabled(
 147                   ! current_autopilot->get_AltitudeEnabled()
 148                 );
 149             return;
 150         case 21: // Ctrl-U key
 151             // add 1000' of emergency altitude.  Possibly good for
 152             // unflipping yourself :-)
 153             {
 154                 double alt = cur_fdm_state->get_Altitude() + 1000;
 155                 fgFDMForceAltitude( current_options.get_flight_model(),
 156                                     alt * FEET_TO_METER );
 157             }
 158             return;
 159         case 49: // numeric keypad 1
 160             v->set_goal_view_offset( FG_PI * 0.75 );
 161             return;
 162         case 50: // numeric keypad 2
 163             v->set_goal_view_offset( FG_PI );
 164             return;
 165         case 51: // numeric keypad 3
 166             v->set_goal_view_offset( FG_PI * 1.25 );
 167             return;
 168         case 52: // numeric keypad 4
 169             v->set_goal_view_offset( FG_PI * 0.50 );
 170             return;
 171         case 54: // numeric keypad 6
 172             v->set_goal_view_offset( FG_PI * 1.50 );
 173             return;
 174         case 55: // numeric keypad 7
 175             v->set_goal_view_offset( FG_PI * 0.25 );
 176             return;
 177         case 56: // numeric keypad 8
 178             v->set_goal_view_offset( 0.00 );
 179             return;
 180         case 57: // numeric keypad 9
 181             v->set_goal_view_offset( FG_PI * 1.75 );
 182             return;
 183         case 65: // A key
 184             speed = current_options.get_speed_up();
 185             speed--;
 186             if ( speed < 1 ) {
 187                 speed = 1;
 188             }
 189             current_options.set_speed_up( speed );
 190             return;
 191         case 72: // H key
 192             // status = current_options.get_hud_status();
 193             // current_options.set_hud_status(!status);
 194             HUD_brightkey( true );
 195             return;
 196         case 73: // I key
 197             // Minimal Hud
 198             fgHUDInit2(&current_aircraft);
 199             return;
 200         case 77: // M key
 201             globals->inc_warp( -60 );
 202             fgUpdateSkyAndLightingParams();
 203             return;
 204         case 80: // P key
 205             current_options.toggle_panel();
 206             break;
 207         case 84: // T key
 208             globals->inc_warp_delta( -30 );
 209             fgUpdateSkyAndLightingParams();
 210             return;
 211         case 87: // W key
 212 #if defined(FX) && !defined(WIN32)
 213             global_fullscreen = ( !global_fullscreen );
 214 #  if defined(XMESA_FX_FULLSCREEN) && defined(XMESA_FX_WINDOW)
 215             XMesaSetFXmode( global_fullscreen ?
 216                             XMESA_FX_FULLSCREEN : XMESA_FX_WINDOW );
 217 #  endif
 218 #endif
 219             return;
 220         case 88: // X key
 221             fov = current_options.get_fov();
 222             fov *= 1.05;
 223             if ( fov > FG_FOV_MAX ) {
 224                 fov = FG_FOV_MAX;
 225             }
 226             current_options.set_fov(fov);
 227             v->force_update_fov_math();
 228             return;
 229         case 90: // Z key
 230 #ifndef FG_OLD_WEATHER
 231             tmp = WeatherDatabase->getWeatherVisibility();
 232             tmp /= 1.10;
 233             WeatherDatabase->setWeatherVisibility( tmp );
 234 #else
 235             tmp = current_weather.get_visibility();   // in meters
 236             tmp /= 1.10;
 237             current_weather.set_visibility( tmp );
 238 #endif
 239             return;
 240         }
 241     } else {
 242         FG_LOG( FG_INPUT, FG_DEBUG, "" );
 243         switch (k) {
 244         case 50: // numeric keypad 2
 245             if ( current_autopilot->get_AltitudeEnabled() ) {
 246                 current_autopilot->AltitudeAdjust( 100 );
 247             } else {
 248                 controls.move_elevator(-0.05);
 249             }
 250             return;
 251         case 56: // numeric keypad 8
 252             if ( current_autopilot->get_AltitudeEnabled() ) {
 253                 current_autopilot->AltitudeAdjust( -100 );
 254             } else {
 255                 controls.move_elevator(0.05);
 256             }
 257             return;
 258         case 49: // numeric keypad 1
 259             controls.move_elevator_trim(-0.001);
 260             return;
 261         case 55: // numeric keypad 7
 262             controls.move_elevator_trim(0.001);
 263             return;
 264         case 52: // numeric keypad 4
 265             controls.move_aileron(-0.05);
 266             return;
 267         case 54: // numeric keypad 6
 268             controls.move_aileron(0.05);
 269             return;
 270         case 48: // numeric keypad Ins
 271             if ( current_autopilot->get_HeadingEnabled() ) {
 272                 current_autopilot->HeadingAdjust( -1 );
 273             } else {
 274                 controls.move_rudder(-0.05);
 275             }
 276             return;
 277         case 13: // numeric keypad Enter
 278             if ( current_autopilot->get_HeadingEnabled() ) {
 279                 current_autopilot->HeadingAdjust( 1 );
 280             } else {
 281                 controls.move_rudder(0.05);
 282             }
 283             return;
 284         case 53: // numeric keypad 5
 285             controls.set_aileron(0.0);
 286             controls.set_elevator(0.0);
 287             controls.set_rudder(0.0);
 288             return;
 289         case 57: // numeric keypad 9 (Pg Up)
 290             if ( current_autopilot->get_AutoThrottleEnabled() ) {
 291                 current_autopilot->AutoThrottleAdjust( 5 );
 292             } else {
 293                 controls.move_throttle( FGControls::ALL_ENGINES, 0.01 );
 294             }
 295             return;
 296         case 51: // numeric keypad 3 (Pg Dn)
 297             if ( current_autopilot->get_AutoThrottleEnabled() ) {
 298                 current_autopilot->AutoThrottleAdjust( -5 );
 299             } else {
 300                 controls.move_throttle( FGControls::ALL_ENGINES, -0.01 );
 301             }
 302             return;
 303         case 91: // [ key
 304             controls.move_flaps(-0.34);
 305             FG_LOG( FG_INPUT, FG_INFO,
 306                     "Set flaps to " << controls.get_flaps() );
 307             return;
 308         case 93: // ] key
 309             controls.move_flaps(0.34);
 310             FG_LOG( FG_INPUT, FG_INFO,
 311                     "Set flaps to " << controls.get_flaps() );
 312             return;
 313         case 97: // a key
 314             speed = current_options.get_speed_up();
 315             speed++;
 316             current_options.set_speed_up( speed );
 317             return;
 318         case 98: // b key
 319             int b_ret;
 320             double b_set;
 321             b_ret = int( controls.get_brake( 0 ) );
 322             b_set = double(!b_ret);
 323             controls.set_brake( FGControls::ALL_WHEELS, b_set);
 324             return;
 325         case 44: // , key
 326             if (controls.get_brake(0) > 0.0) {
 327                 controls.set_brake(0, 0.0);
 328             } else {
 329                 controls.set_brake(0, 1.0);
 330             }
 331             return;
 332         case 46: // . key
 333             if (controls.get_brake(1) > 0.0) {
 334                 controls.set_brake(1, 0.0);
 335             } else {
 336                 controls.set_brake(1, 1.0);
 337             }
 338             return;
 339         case 104: // h key
 340             HUD_masterswitch( true );
 341             return;
 342         case 105: // i key
 343             fgHUDInit(&current_aircraft);  // normal HUD
 344             return;
 345         case 109: // m key
 346             globals->inc_warp( 60 );
 347             fgUpdateSkyAndLightingParams();
 348             return;
 349         case 112: // p key
 350             globals->set_freeze( ! globals->get_freeze() );
 351
 352             {
 353                 FGBucket p( f->get_Longitude() * RAD_TO_DEG,
 354                             f->get_Latitude() * RAD_TO_DEG );
 355                 FGPath tile_path( current_options.get_fg_root() );
 356                 tile_path.append( "Scenery" );
 357                 tile_path.append( p.gen_base_path() );
 358                 tile_path.append( p.gen_index_str() );
 359
 360                 // printf position and attitude information
 361                 FG_LOG( FG_INPUT, FG_INFO,
 362                         "Lon = " << f->get_Longitude() * RAD_TO_DEG
 363                         << "  Lat = " << f->get_Latitude() * RAD_TO_DEG
 364                         << "  Altitude = " << f->get_Altitude() * FEET_TO_METER
 365                         );
 366                 FG_LOG( FG_INPUT, FG_INFO,
 367                         "Heading = " << f->get_Psi() * RAD_TO_DEG
 368                         << "  Roll = " << f->get_Phi() * RAD_TO_DEG
 369                         << "  Pitch = " << f->get_Theta() * RAD_TO_DEG );
 370                 FG_LOG( FG_INPUT, FG_INFO, tile_path.c_str());
 371             }
 372             return;
 373         case 116: // t key
 374             globals->inc_warp_delta( 30 );
 375             fgUpdateSkyAndLightingParams();
 376             return;
 377         case 118: // v key
 378             current_options.cycle_view_mode();
 379             return;
 380         case 120: // x key
 381             fov = current_options.get_fov();
 382             fov /= 1.05;
 383             if ( fov < FG_FOV_MIN ) {
 384                 fov = FG_FOV_MIN;
 385             }
 386             current_options.set_fov(fov);
 387             v->force_update_fov_math();
 388             return;
 389         case 122: // z key
 390 #ifndef FG_OLD_WEATHER
 391             tmp = WeatherDatabase->getWeatherVisibility();
 392             tmp *= 1.10;
 393             WeatherDatabase->setWeatherVisibility( tmp );
 394 #else
 395             tmp = current_weather.get_visibility();   // in meters
 396             tmp *= 1.10;
 397             current_weather.set_visibility( tmp );
 398 #endif
 399             return;
 400         case 27: // ESC
 401             // if( fg_DebugOutput ) {
 402             //   fclose( fg_DebugOutput );
 403             // }
 404             FG_LOG( FG_INPUT, FG_ALERT,
 405                     "Program exit requested." );
 406             ConfirmExitDialog();
 407             return;
 408         }
 409     }
 410 }
 411
 412
 413 // Handle "special" keyboard events
 414 void GLUTspecialkey(int k, int x, int y) {
 415     FGView *v;
 416
 417     v = &current_view;
 418
 419     FG_LOG( FG_INPUT, FG_DEBUG, "Special key hit = " << k );
 420
 421     if ( puKeyboard(k + PU_KEY_GLUT_SPECIAL_OFFSET, PU_DOWN) ) {
 422         return;
 423     }
 424
 425     if ( GLUT_ACTIVE_SHIFT && glutGetModifiers() ) {
 426         FG_LOG( FG_INPUT, FG_DEBUG, " SHIFTED" );
 427         switch (k) {
 428         case GLUT_KEY_F1: {
 429             ifstream input("fgfs.sav");
 430             if (input.good() && fgLoadFlight(input)) {
 431                 input.close();
 432                 FG_LOG(FG_INPUT, FG_INFO, "Restored flight from fgfs.sav");
 433             } else {
 434                 FG_LOG(FG_INPUT, FG_ALERT, "Cannot load flight from fgfs.sav");
 435             }
 436             return;
 437         }
 438         case GLUT_KEY_F2: {
 439             FG_LOG(FG_INPUT, FG_INFO, "Saving flight");
 440             ofstream output("fgfs.sav");
 441             if (output.good() && fgSaveFlight(output)) {
 442                 output.close();
 443                 FG_LOG(FG_INPUT, FG_INFO, "Saved flight to fgfs.sav");
 444             } else {
 445                 FG_LOG(FG_INPUT, FG_ALERT, "Cannot save flight to fgfs.sav");
 446             }
 447             return;
 448         }
 449         case GLUT_KEY_F3: {
 450           string panel_path =
 451             current_properties.getStringValue("/sim/panel/path",
 452                                               "Panels/Default/default.xml");
 453           FGPanel * new_panel = fgReadPanel(panel_path);
 454           if (new_panel == 0) {
 455             FG_LOG(FG_INPUT, FG_ALERT,
 456                    "Error reading new panel from " << panel_path);
 457             return;
 458           }
 459           FG_LOG(FG_INPUT, FG_INFO, "Loaded new panel from " << panel_path);
 460           delete current_panel;
 461           current_panel = new_panel;
 462           return;
 463         }
 464         case GLUT_KEY_F4: {
 465           FGPath props_path(current_options.get_fg_root());
 466           props_path.append("preferences.xml");
 467           FG_LOG(FG_INPUT, FG_INFO, "Rereading global preferences");
 468           if (!readPropertyList(props_path.str(), &current_properties)) {
 469             FG_LOG(FG_INPUT, FG_ALERT,
 470                    "Failed to reread global preferences from "
 471                    << props_path.str());
 472           } else {
 473             FG_LOG(FG_INPUT, FG_INFO, "Finished Reading global preferences");
 474           }
 475           return;
 476         }
 477         case GLUT_KEY_F5: {
 478           current_panel->setYOffset(current_panel->getYOffset() - 5);
 479           fgReshape(current_view.get_winWidth(),
 480                     current_view.get_winHeight());
 481           return;
 482         }
 483         case GLUT_KEY_F6: {
 484           current_panel->setYOffset(current_panel->getYOffset() + 5);
 485           fgReshape(current_view.get_winWidth(),
 486                     current_view.get_winHeight());
 487           return;
 488         }
 489         case GLUT_KEY_F7: {
 490           current_panel->setXOffset(current_panel->getXOffset() - 5);
 491           return;
 492         }
 493         case GLUT_KEY_F8: {
 494           current_panel->setXOffset(current_panel->getXOffset() + 5);
 495           return;
 496         }
 497         case GLUT_KEY_END: // numeric keypad 1
 498             v->set_goal_view_offset( FG_PI * 0.75 );
 499             return;
 500         case GLUT_KEY_DOWN: // numeric keypad 2
 501             v->set_goal_view_offset( FG_PI );
 502             return;
 503         case GLUT_KEY_PAGE_DOWN: // numeric keypad 3
 504             v->set_goal_view_offset( FG_PI * 1.25 );
 505             return;
 506         case GLUT_KEY_LEFT: // numeric keypad 4
 507             v->set_goal_view_offset( FG_PI * 0.50 );
 508             return;
 509         case GLUT_KEY_RIGHT: // numeric keypad 6
 510             v->set_goal_view_offset( FG_PI * 1.50 );
 511             return;
 512         case GLUT_KEY_HOME: // numeric keypad 7
 513             v->set_goal_view_offset( FG_PI * 0.25 );
 514             return;
 515         case GLUT_KEY_UP: // numeric keypad 8
 516             v->set_goal_view_offset( 0.00 );
 517             return;
 518         case GLUT_KEY_PAGE_UP: // numeric keypad 9
 519             v->set_goal_view_offset( FG_PI * 1.75 );
 520             return;
 521         }
 522     } else {
 523         FG_LOG( FG_INPUT, FG_DEBUG, "" );
 524         switch (k) {
 525         case GLUT_KEY_F2: // F2 Reload Tile Cache...
 526             {
 527                 bool freeze;
 528                 FG_LOG(FG_INPUT, FG_INFO, "ReIniting TileCache");
 529                 if ( !freeze )
 530                     globals->set_freeze( true );
 531                 BusyCursor(0);
 532                 if ( global_tile_mgr.init() ) {
 533                     // Load the local scenery data
 534                     global_tile_mgr.update(
 535                         cur_fdm_state->get_Longitude() * RAD_TO_DEG,
 536                         cur_fdm_state->get_Latitude() * RAD_TO_DEG );
 537                 } else {
 538                     FG_LOG( FG_GENERAL, FG_ALERT,
 539                             "Error in Tile Manager initialization!" );
 540                     exit(-1);
 541                 }
 542                 BusyCursor(1);
 543                 if ( !freeze )
 544                    globals->set_freeze( false );
 545                 return;
 546             }
 547         case GLUT_KEY_F3: // F3 Take a screen shot
 548             fgDumpSnapShot();
 549             return;
 550         case GLUT_KEY_F6: // F6 toggles Autopilot target location
 551             if ( current_autopilot->get_HeadingMode() !=
 552                  FGAutopilot::FG_HEADING_WAYPOINT ) {
 553                 current_autopilot->set_HeadingMode(
 554                     FGAutopilot::FG_HEADING_WAYPOINT );
 555                 current_autopilot->set_HeadingEnabled( true );
 556             } else {
 557                 current_autopilot->set_HeadingMode(
 558                     FGAutopilot::FG_HEADING_LOCK );
 559             }
 560             return;
 561         case GLUT_KEY_F8: // F8 toggles fog ... off fastest nicest...
 562             current_options.cycle_fog();
 563
 564             if ( current_options.get_fog() == fgOPTIONS::FG_FOG_DISABLED ) {
 565                 FG_LOG( FG_INPUT, FG_INFO, "Fog disabled" );
 566             } else if ( current_options.get_fog() ==
 567                         fgOPTIONS::FG_FOG_FASTEST )
 568             {
 569                 FG_LOG( FG_INPUT, FG_INFO,
 570                         "Fog enabled, hint set to fastest" );
 571             } else if ( current_options.get_fog() ==
 572                         fgOPTIONS::FG_FOG_NICEST )
 573             {
 574                 FG_LOG( FG_INPUT, FG_INFO,
 575                         "Fog enabled, hint set to nicest" );
 576             }
 577
 578             return;
 579         case GLUT_KEY_F9: // F9 toggles textures on and off...
 580             FG_LOG( FG_INPUT, FG_INFO, "Toggling texture" );
 581             if ( current_options.get_textures() ) {
 582                 current_options.set_textures( false );
 583                 material_lib.set_step( 1 );
 584             } else {
 585                 current_options.set_textures( true );
 586                 material_lib.set_step( 0 );
 587             }
 588             return;
 589         case GLUT_KEY_F10: // F10 toggles menu on and off...
 590             FG_LOG(FG_INPUT, FG_INFO, "Invoking call back function");
 591             guiToggleMenu();
 592             return;
 593         case GLUT_KEY_F11: // F11 Altitude Dialog.
 594             FG_LOG(FG_INPUT, FG_INFO, "Invoking Altitude call back function");
 595             NewAltitude( NULL );
 596             return;
 597         case GLUT_KEY_F12: // F12 Heading Dialog...
 598             FG_LOG(FG_INPUT, FG_INFO, "Invoking Heading call back function");
 599             NewHeading( NULL );
 600             return;
 601         case GLUT_KEY_UP:
 602             if ( current_autopilot->get_AltitudeEnabled() ) {
 603                 current_autopilot->AltitudeAdjust( -100 );
 604             } else {
 605                 controls.move_elevator(0.05);
 606             }
 607             return;
 608         case GLUT_KEY_DOWN:
 609             if ( current_autopilot->get_AltitudeEnabled() ) {
 610                 current_autopilot->AltitudeAdjust( 100 );
 611             } else {
 612                 controls.move_elevator(-0.05);
 613             }
 614             return;
 615         case GLUT_KEY_LEFT:
 616             controls.move_aileron(-0.05);
 617             return;
 618         case GLUT_KEY_RIGHT:
 619             controls.move_aileron(0.05);
 620             return;
 621         case GLUT_KEY_HOME: // numeric keypad 1
 622             controls.move_elevator_trim(0.001);
 623             return;
 624         case GLUT_KEY_END: // numeric keypad 7
 625             controls.move_elevator_trim(-0.001);
 626             return;
 627         case GLUT_KEY_INSERT: // numeric keypad Ins
 628             if ( current_autopilot->get_HeadingEnabled() ) {
 629                 current_autopilot->HeadingAdjust( -1 );
 630             } else {
 631                 controls.move_rudder(-0.05);
 632             }
 633             return;
 634         case 13: // numeric keypad Enter
 635             if ( current_autopilot->get_HeadingEnabled() ) {
 636                 current_autopilot->HeadingAdjust( 1 );
 637             } else {
 638                 controls.move_rudder(0.05);
 639             }
 640             return;
 641         case 53: // numeric keypad 5
 642             controls.set_aileron(0.0);
 643             controls.set_elevator(0.0);
 644             controls.set_rudder(0.0);
 645             return;
 646         case GLUT_KEY_PAGE_UP: // numeric keypad 9 (Pg Up)
 647             if ( current_autopilot->get_AutoThrottleEnabled() ) {
 648                 current_autopilot->AutoThrottleAdjust( 5 );
 649             } else {
 650                 controls.move_throttle( FGControls::ALL_ENGINES, 0.01 );
 651             }
 652             return;
 653         case GLUT_KEY_PAGE_DOWN: // numeric keypad 3 (Pg Dn)
 654             if ( current_autopilot->get_AutoThrottleEnabled() ) {
 655                 current_autopilot->AutoThrottleAdjust( -5 );
 656             } else {
 657                 controls.move_throttle( FGControls::ALL_ENGINES, -0.01 );
 658             }
 659             return;
 660         }
 661     }
 662 }
 663
 664