Simulator/Cockpit/hud.cxx

   1 // hud.cxx -- hud defines and prototypes
   2 //
   3 // Written by Michele America, started September 1997.
   4 //
   5 // Copyright (C) 1997  Michele F. America  - micheleamerica@geocities.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 #ifdef HAVE_CONFIG_H
  25 #  include <config.h>
  26 #endif
  27
  28 #ifdef HAVE_WINDOWS_H
  29 #  include <windows.h>
  30 #endif
  31
  32 #ifdef __BORLANDC__
  33 #  define exception c_exception
  34 #endif
  35 #include <math.h>
  36
  37 #include <GL/glut.h>
  38 #include <stdlib.h>
  39 #include <string.h>
  40
  41 #include <Aircraft/aircraft.hxx>
  42 #include <Debug/logstream.hxx>
  43 #include <Include/fg_constants.h>
  44 #include <Main/options.hxx>
  45 #include <Math/fg_random.h>
  46 #include <Math/mat3.h>
  47 #include <Math/polar3d.hxx>
  48 #include <Scenery/scenery.hxx>
  49 #include <Time/fg_timer.hxx>
  50
  51 #if defined ( __sun__ ) || defined ( __sgi )
  52 extern "C" {
  53   extern void *memmove(void *, const void *, size_t);
  54 }
  55 #endif
  56
  57 #include "hud.hxx"
  58
  59
  60 static char units[5];
  61
  62 // The following routines obtain information concerntin the aircraft's
  63 // current state and return it to calling instrument display routines.
  64 // They should eventually be member functions of the aircraft.
  65 //
  66
  67 HudContainerType HUD_deque;
  68
  69 class locRECT {
  70   public:
  71     RECT rect;
  72
  73     locRECT( UINT left, UINT top, UINT right, UINT bottom);
  74     RECT get_rect(void) { return rect;}
  75 };
  76
  77 locRECT :: locRECT( UINT left, UINT top, UINT right, UINT bottom)
  78 {
  79   rect.left   =  left;
  80   rect.top    =  top;
  81   rect.right  =  right;
  82   rect.bottom =  bottom;
  83
  84 }
  85 // #define DEBUG
  86
  87 void drawOneLine( UINT x1, UINT y1, UINT x2, UINT y2)
  88 {
  89   glBegin(GL_LINES);
  90   glVertex2f(x1, y1);
  91   glVertex2f(x2, y2);
  92   glEnd();
  93 }
  94
  95 void drawOneLine( RECT &rect)
  96 {
  97   glBegin(GL_LINES);
  98   glVertex2f(rect.left, rect.top);
  99   glVertex2f(rect.right, rect.bottom);
 100   glEnd();
 101 }
 102
 103 //
 104 // The following code deals with painting the "instrument" on the display
 105 //
 106    /* textString - Bitmap font string */
 107
 108 void textString( int x, int y, char *msg, void *font ){
 109         glRasterPos2f(x, y);
 110         while (*msg) {
 111                 glutBitmapCharacter(font, *msg);
 112                 msg++;
 113     }
 114 }
 115
 116 /* strokeString - Stroke font string */
 117
 118 void strokeString(int x, int y, char *msg, void *font, float theta)
 119 {
 120 int xx;
 121 int yy;
 122
 123         glPushMatrix();
 124   glRotatef(theta * RAD_TO_DEG, 0.0, 0.0, 1.0);
 125   xx = (int)(x * cos(theta) + y * sin( theta ));
 126   yy = (int)(y * cos(theta) - x * sin( theta ));
 127         glTranslatef( xx, yy, 0);
 128         glScalef(.1, .1, 0.0);
 129         while (*msg) {
 130                 glutStrokeCharacter(font, *msg);
 131                 msg++;
 132         }
 133         glPopMatrix();
 134 }
 135
 136 //========================= End of Class Implementations===================
 137 // fgHUDInit
 138 //
 139 // Constructs a HUD object and then adds in instruments. At the present
 140 // the instruments are hard coded into the routine. Ultimately these need
 141 // to be defined by the aircraft's instrumentation records so that the
 142 // display for a Piper Cub doesn't show the speed range of a North American
 143 // mustange and the engine readouts of a B36!
 144 //
 145
 146 #define INSTRDEFS 21
 147
 148 int fgHUDInit( fgAIRCRAFT * /* current_aircraft */ )
 149 {
 150   instr_item *HIptr;
 151   int index;
 152
 153   FG_LOG( FG_COCKPIT, FG_INFO, "Initializing current aircraft HUD" );
 154
 155   HUD_deque.erase( HUD_deque.begin(), HUD_deque.end());  // empty the HUD deque
 156
 157 //  hud->code = 1;
 158 //  hud->status = 0;
 159
 160   // For now lets just hardcode the hud here.
 161   // In the future, hud information has to come from the same place
 162   // aircraft information came from.
 163
 164 //  fgHUDSetTimeMode( hud, NIGHT );
 165 //  fgHUDSetBrightness( hud, BRT_LIGHT );
 166
 167   index = 0;
 168
 169   do {
 170     switch ( index ) {
 171       case 0:     // TBI
 172         HIptr = (instr_item *) new fgTBI_instr( 270, 100, 60, 10 );
 173         break;
 174
 175       case 1:     // Artificial Horizon
 176         HIptr = (instr_item *) new HudLadder( 240, 195, 120, 180 );
 177         break;
 178
 179       case 2:    // KIAS
 180         HIptr = (instr_item *) new hud_card( 130,
 181                                              170,
 182                                               28,
 183                                              200,
 184                                              get_speed,
 185                                              HUDS_LEFT | HUDS_VERT,
 186                                              200.0, 0.0,
 187                                              1.0,
 188                                              10,  5,
 189                                              0,
 190                                              0,
 191                                              50.0,
 192                                              true);
 193
 194         break;
 195
 196       case 3:    // Radio Altimeter
 197         HIptr = (instr_item *) new hud_card( 420,
 198                                              195,
 199                                               25,
 200                                              150,
 201                                              get_agl,
 202                                              HUDS_LEFT | HUDS_VERT,
 203                                              1000, 0,
 204                                              1.0,
 205                                              25,    5,
 206                                              0,
 207                                              0,
 208                                              200.0,
 209                                              true);
 210         break;
 211
 212       case 4:    // GYRO COMPASS
 213         HIptr = (instr_item *) new hud_card( 200,
 214                                              375,
 215                                              200,
 216                                               28,
 217                                              get_heading,
 218                                              HUDS_TOP,
 219                                              360, 0,
 220                                                1.0,
 221                                                5,   1,
 222                                              360,
 223                                                0,
 224                                               25,
 225                                              true);
 226         break;
 227
 228       case 5:    // AMSL
 229         HIptr = (instr_item *) new hud_card( 460,
 230                                              170,
 231                                               35,
 232                                              200,
 233                                              get_altitude,
 234                                              HUDS_RIGHT | HUDS_VERT,
 235                                              15000, -500,
 236                                              1.0,
 237                                              100,  25,
 238                                              0,
 239                                              0,
 240                                              250,
 241                                              true);
 242         break;
 243
 244       case 6:
 245         HIptr = (instr_item *) new  guage_instr( 250,            // x
 246                                                  350,            // y
 247                                                  100,            // width
 248                                                   20,            // height
 249                                                  get_aileronval, // data source
 250                                                  HUDS_BOTTOM | HUDS_NOTEXT,
 251                                                  100.0,
 252                                                  +1.0,
 253                                                  -1.0);
 254         break;
 255
 256       case 7:
 257         HIptr = (instr_item *) new  guage_instr( 170,             // x
 258                                                  225,             // y
 259                                                   20,             // width
 260                                                  100,             // height
 261                                                  get_elevatorval, // data source
 262                                                  HUDS_RIGHT | HUDS_VERT | HUDS_NOTEXT,
 263                                                 -100.0,           // Scale data
 264                                                   +1.0,           // Data Range
 265                                                   -1.0);
 266         break;
 267
 268       case 8:
 269         HIptr = (instr_item *) new  guage_instr( 250,             // x
 270                                                  200,             // y
 271                                                  100,             // width
 272                                                   20,             // height
 273                                                  get_rudderval,   // data source
 274                                                  HUDS_TOP | HUDS_NOTEXT,
 275                                                  100.0,
 276                                                  +1.0,
 277                                                  -1.0);
 278         break;
 279
 280       case 9:
 281         HIptr = (instr_item *) new  guage_instr( 100,             // x
 282                                                  190,
 283                                                   20,
 284                                                  160,             // height
 285                                                  get_throttleval, // data source
 286                                                  HUDS_VERT | HUDS_RIGHT | HUDS_NOTEXT,
 287                                                  100.0,
 288                                                    1.0,
 289                                                    0.0);
 290         break;
 291
 292       case 10:    // Digital KIAS
 293         HIptr = (instr_item *) new instr_label ( 110,
 294                                                  150,
 295                                                   40,
 296                                                   30,
 297                                                  get_speed,
 298                                                  "%5.0f",
 299                                                  NULL,
 300                                                  " Kts",
 301                                                  1.0,
 302                                                  HUDS_TOP,
 303                                                  RIGHT_JUST,
 304                                                  SMALL,
 305                                                  0,
 306                                                  TRUE );
 307         break;
 308
 309       case 11:    // Digital Rate of Climb
 310         HIptr = (instr_item *) new instr_label ( 110,
 311                                                  135,
 312                                                   40,
 313                                                   10,
 314                                                  get_climb_rate,
 315                                                  "%5.0f",
 316                                                  " Climb",
 317                                                  NULL,
 318                                                  1.0,
 319                                                  HUDS_TOP,
 320                                                  RIGHT_JUST,
 321                                                  SMALL,
 322                                                  0,
 323                                                  TRUE );
 324         break;
 325
 326       case 12:    // Roll indication diagnostic
 327         HIptr = (instr_item *) new instr_label ( 110,
 328                                                  120,
 329                                                   40,
 330                                                   10,
 331                                                  get_roll,
 332                                                  "%5.2f",
 333                                                  " Roll",
 334                                                  " Deg",
 335                                                  1.0,
 336                                                  HUDS_TOP,
 337                                                  RIGHT_JUST,
 338                                                  SMALL,
 339                                                  0,
 340                                                  TRUE );
 341         break;
 342
 343       case 13:    // Angle of attack diagnostic
 344         HIptr = (instr_item *) new instr_label ( 440,
 345                                                  150,
 346                                                   60,
 347                                                   10,
 348                                                  get_aoa,
 349                                                  "      %5.2f",
 350                                                  "AOA",
 351                                                  " Deg",
 352                                                  1.0,
 353                                                  HUDS_TOP,
 354                                                  RIGHT_JUST,
 355                                                  SMALL,
 356                                                  0,
 357                                                  TRUE );
 358         break;
 359
 360       case 14:
 361         HIptr = (instr_item *) new instr_label ( 440,
 362                                                  135,
 363                                                   60,
 364                                                   10,
 365                                                  get_heading,
 366                                                  " %5.1f",
 367                                                  "Heading ",
 368                                                  " Deg",
 369                                                  1.0,
 370                                                  HUDS_TOP,
 371                                                  RIGHT_JUST,
 372                                                  SMALL,
 373                                                  0,
 374                                                  TRUE );
 375         break;
 376
 377       case 15:
 378         HIptr = (instr_item *) new instr_label ( 440,
 379                                                  120,
 380                                                   60,
 381                                                   10,
 382                                                  get_sideslip,
 383                                                  "%5.2f",
 384                                                  "Sideslip ",
 385                                                  NULL,
 386                                                  1.0,
 387                                                  HUDS_TOP,
 388                                                  RIGHT_JUST,
 389                                                  SMALL,
 390                                                  0,
 391                                                  TRUE );
 392         break;
 393
 394       case 16:
 395         HIptr = (instr_item *) new instr_label( 440,
 396                                                 100,
 397                                                  60,
 398                                                  10,
 399                                                 get_throttleval,
 400                                                 "%5.2f",
 401                                                 "Throttle ",
 402                                                 NULL,
 403                                                  1.0,
 404                                                 HUDS_TOP,
 405                                                 RIGHT_JUST,
 406                                                 SMALL,
 407                                                 0,
 408                                                 TRUE );
 409         break;
 410
 411       case 17:
 412         HIptr = (instr_item *) new instr_label( 440,
 413                                                  85,
 414                                                  60,
 415                                                  10,
 416                                                 get_elevatorval,
 417                                                 "%5.2f",
 418                                                 "Elevator ",
 419                                                 NULL,
 420                                                  1.0,
 421                                                 HUDS_TOP,
 422                                                 RIGHT_JUST,
 423                                                 SMALL,
 424                                                 0,
 425                                                 TRUE );
 426         break;
 427
 428       case 18:
 429         HIptr = (instr_item *) new instr_label( 440,
 430                                                  60,
 431                                                  60,
 432                                                  10,
 433                                                 get_aileronval,
 434                                                 "%5.2f",
 435                                                 "Aileron  ",
 436                                                 NULL,
 437                                                  1.0,
 438                                                 HUDS_TOP,
 439                                                 RIGHT_JUST,
 440                                                 SMALL,
 441                                                 0,
 442                                                 TRUE );
 443         break;
 444
 445
 446       case 19:
 447         HIptr = (instr_item *) new instr_label( 10,
 448                                                 10,
 449                                                 60,
 450                                                 10,
 451                                                  get_frame_rate,
 452                                                 "%.0f",
 453                                                 "Frame rate = ",
 454                                                 NULL,
 455                                                  1.0,
 456                                                 HUDS_TOP,
 457                                                 RIGHT_JUST,
 458                                                 SMALL,
 459                                                 0,
 460                                                 TRUE );
 461         break;
 462
 463       case 20:
 464           switch( current_options.get_tris_or_culled() ) {
 465           case 0:
 466               HIptr = (instr_item *) new instr_label( 10,
 467                                                       25,
 468                                                       90,
 469                                                       10,
 470                                                       get_vfc_tris_drawn,
 471                                                       "%.0f",
 472                                                       "Tris Rendered = ",
 473                                                       NULL,
 474                                                       1.0,
 475                                                       HUDS_TOP,
 476                                                       RIGHT_JUST,
 477                                                       SMALL,
 478                                                       0,
 479                                                       TRUE );
 480               break;
 481           case 1:
 482               HIptr = (instr_item *) new instr_label( 10,
 483                                                       25,
 484                                                       90,
 485                                                       10,
 486                                                       get_vfc_ratio,
 487                                                       "%.2f",
 488                                                       "VFC Ratio = ",
 489                                                       NULL,
 490                                                       1.0,
 491                                                       HUDS_TOP,
 492                                                       RIGHT_JUST,
 493                                                       SMALL,
 494                                                       0,
 495                                                       TRUE );
 496               break;
 497           }
 498           break;
 499
 500       case 21:
 501         HIptr = (instr_item *) new instr_label( 10,
 502                                                 40,
 503                                                 90,
 504                                                 10,
 505                                                 get_fov,
 506                                                 "%.1f",
 507                                                 "FOV = ",
 508                                                 NULL,
 509                                                 1.0,
 510                                                 HUDS_TOP,
 511                                                 RIGHT_JUST,
 512                                                 SMALL,
 513                                                 0,
 514                                                 TRUE );
 515         break;
 516
 517       default:
 518         HIptr = 0;;
 519       }
 520     if( HIptr ) {                   // Anything to install?
 521       HUD_deque.insert( HUD_deque.begin(), HIptr);
 522       }
 523     index++;
 524     }
 525   while( HIptr );
 526
 527   return 0;  // For now. Later we may use this for an error code.
 528 }
 529
 530 int fgHUDInit2( fgAIRCRAFT * /* current_aircraft */ )
 531 {
 532     int index;
 533
 534     FG_LOG( FG_COCKPIT, FG_INFO, "Initializing current aircraft HUD" );
 535
 536     HUD_deque.erase( HUD_deque.begin(), HUD_deque.end());
 537
 538     //  hud->code = 1;
 539     //  hud->status = 0;
 540
 541     // For now lets just hardcode the hud here.
 542     // In the future, hud information has to come from the same place
 543     // aircraft information came from.
 544
 545     //  fgHUDSetTimeMode( hud, NIGHT );
 546     //  fgHUDSetBrightness( hud, BRT_LIGHT );
 547
 548     //  index = 0;
 549     index = 19;
 550
 551     instr_item* p;
 552
 553     p = new instr_label( 10, 10, 60, 10,
 554                          get_frame_rate,
 555                          "%.0f",
 556                          "Frame rate = ",
 557                          NULL,
 558                          1.0,
 559                          HUDS_TOP,
 560                          RIGHT_JUST,
 561                          SMALL,
 562                          0,
 563                          TRUE );
 564     HUD_deque.push_front( p );
 565
 566     if ( current_options.get_tris_or_culled() == 0 )
 567         p = new instr_label( 10, 25, 90, 10,
 568                              get_vfc_tris_drawn,
 569                              "%.0f",
 570                              "Tris Rendered = ",
 571                              NULL,
 572                              1.0,
 573                              HUDS_TOP,
 574                              RIGHT_JUST,
 575                              SMALL,
 576                              0,
 577                              TRUE );
 578     else
 579         p = new instr_label( 10, 25, 90, 10,
 580                              get_vfc_ratio,
 581                              "%.2f",
 582                              "VFC Ratio = ",
 583                              NULL,
 584                              1.0,
 585                              HUDS_TOP,
 586                              RIGHT_JUST,
 587                              SMALL,
 588                              0,
 589                              TRUE );
 590     HUD_deque.push_front( p );
 591
 592     p = new instr_label( 10, 40, 90, 10,
 593                          get_fov,
 594                          "%.1f",
 595                          "FOV = ",
 596                          NULL,
 597                          1.0,
 598                          HUDS_TOP,
 599                          RIGHT_JUST,
 600                          SMALL,
 601                          0,
 602                          TRUE );
 603     HUD_deque.push_front( p );
 604
 605     const int x_pos = 480;
 606     p = new instr_label( x_pos, 40, 40, 30,
 607                          get_speed,
 608                          "%5.0f",
 609                          "Airspeed ",
 610                          " Kts",
 611                          1.0,
 612                          HUDS_TOP,
 613                          RIGHT_JUST,
 614                          SMALL,
 615                          0,
 616                          TRUE );
 617     HUD_deque.push_front( p );
 618
 619     if ( current_options.get_units() == fgOPTIONS::FG_UNITS_FEET ) {
 620         strcpy(units, " ft");
 621     } else {
 622         strcpy(units, " m");
 623     }
 624     p = new instr_label( x_pos, 25, 40, 10,
 625                          get_altitude,
 626                          "%5.0f",
 627                          "Altitude ",
 628                          units,
 629                          1.0,
 630                          HUDS_TOP,
 631                          RIGHT_JUST,
 632                          SMALL,
 633                          0,
 634                          TRUE );
 635     HUD_deque.push_front( p );
 636
 637     p = new instr_label( x_pos, 10, 60, 10,
 638                          get_heading,
 639                          "%5.1f",
 640                          "Heading  ",
 641                          " Deg",
 642                          1.0,
 643                          HUDS_TOP,
 644                          RIGHT_JUST,
 645                          SMALL,
 646                          0,
 647                          TRUE );
 648     HUD_deque.push_front( p );
 649
 650     return 0;  // For now. Later we may use this for an error code.
 651 }
 652
 653 int global_day_night_switch = DAY;
 654
 655 void HUD_brightkey( bool incr_bright )
 656 {
 657 instr_item *pHUDInstr = HUD_deque[0];
 658 int brightness        = pHUDInstr->get_brightness();
 659
 660   if( current_options.get_hud_status() ) {
 661     if( incr_bright ) {
 662       switch (brightness) {
 663         case BRT_LIGHT:
 664               current_options.set_hud_status(0);
 665           break;
 666
 667         case BRT_MEDIUM:
 668           brightness = BRT_LIGHT;
 669           break;
 670
 671         case BRT_DARK:
 672           brightness = BRT_MEDIUM;
 673           break;
 674
 675         case BRT_BLACK:
 676           brightness = BRT_DARK;
 677           break;
 678
 679         default:
 680           brightness = BRT_BLACK;
 681         }
 682       }
 683     else {
 684       switch (brightness) {
 685         case BRT_LIGHT:
 686           brightness = BRT_MEDIUM;
 687           break;
 688
 689         case BRT_MEDIUM:
 690           brightness = BRT_DARK;
 691           break;
 692
 693         case BRT_DARK:
 694           brightness = BRT_BLACK;
 695           break;
 696
 697         case BRT_BLACK:
 698         default:
 699               current_options.set_hud_status(0);
 700         }
 701       }
 702     }
 703   else {
 704     current_options.set_hud_status(1);
 705     if( incr_bright ) {
 706       if( DAY == global_day_night_switch ) {
 707         brightness = BRT_BLACK;
 708         }
 709       else {
 710         brightness = BRT_DARK;
 711         global_day_night_switch = DAY;
 712         }
 713       }
 714     else {
 715       if( NIGHT == global_day_night_switch ) {
 716         brightness = BRT_DARK;
 717         }
 718       else {
 719         brightness = BRT_MEDIUM;
 720         global_day_night_switch = NIGHT;
 721         }
 722       }
 723     }
 724   pHUDInstr->SetBrightness( brightness );
 725 }
 726
 727 // fgUpdateHUD
 728 //
 729 // Performs a once around the list of calls to instruments installed in
 730 // the HUD object with requests for redraw. Kinda. It will when this is
 731 // all C++.
 732 //
 733 void fgUpdateHUD( void ) {
 734   int i;
 735   int brightness;
 736 //  int day_night_sw = current_aircraft.controls->day_night_switch;
 737   int day_night_sw = global_day_night_switch;
 738   int hud_displays = HUD_deque.size();
 739   instr_item *pHUDInstr;
 740
 741   if( !hud_displays ) {  // Trust everyone, but ALWAYS cut the cards!
 742     return;
 743     }
 744
 745   pHUDInstr = HUD_deque[0];
 746   brightness = pHUDInstr->get_brightness();
 747 //  brightness = HUD_deque.at(0)->get_brightness();
 748
 749   glMatrixMode(GL_PROJECTION);
 750   glPushMatrix();
 751
 752   glLoadIdentity();
 753   gluOrtho2D(0, 640, 0, 480);
 754   glMatrixMode(GL_MODELVIEW);
 755   glPushMatrix();
 756   glLoadIdentity();
 757
 758   glColor3f(1.0, 1.0, 1.0);
 759   glIndexi(7);
 760
 761   glDisable(GL_DEPTH_TEST);
 762   glDisable(GL_LIGHTING);
 763
 764   glLineWidth(1);
 765
 766   HudIterator current = HUD_deque.begin();
 767   HudIterator last = HUD_deque.end();
 768
 769   for ( ; current != last; ++current ) {
 770     pHUDInstr = *current;
 771
 772     // for( i = hud_displays; i; --i) { // Draw everything
 773     // if( HUD_deque.at(i)->enabled()) {
 774     // pHUDInstr = HUD_deque[i - 1];
 775     if( pHUDInstr->enabled()) {
 776                                    // We should to respond to a dial instead
 777                                    // or as well to the of time of day. Of
 778                                    // course, we have no dial!
 779       if( day_night_sw == DAY) {
 780         switch (brightness) {
 781           case BRT_LIGHT:
 782             glColor3f (0.1, 0.9, 0.1);
 783             break;
 784
 785           case BRT_MEDIUM:
 786             glColor3f (0.1, 0.7, 0.0);
 787             break;
 788
 789           case BRT_DARK:
 790             glColor3f (0.0, 0.5, 0.0);
 791             break;
 792
 793           case BRT_BLACK:
 794             glColor3f( 0.0, 0.0, 0.0);
 795             break;
 796
 797           default:;
 798             }
 799           }
 800         else {
 801           if( day_night_sw == NIGHT) {
 802             switch (brightness) {
 803               case BRT_LIGHT:
 804                 glColor3f (0.9, 0.1, 0.1);
 805                 break;
 806
 807               case BRT_MEDIUM:
 808                 glColor3f (0.7, 0.0, 0.1);
 809                 break;
 810
 811               case BRT_DARK:
 812               default:
 813                 glColor3f (0.5, 0.0, 0.0);
 814               }
 815             }
 816           else {     // Just in case default
 817             glColor3f (0.1, 0.9, 0.1);
 818             }
 819           }
 820     //  fgPrintf( FG_COCKPIT, FG_DEBUG, "HUD Code %d  Status %d\n",
 821     //            hud->code, hud->status );
 822       pHUDInstr->draw();
 823 //      HUD_deque.at(i)->draw(); // Responsible for broken or fixed variants.
 824                               // No broken displays honored just now.
 825       }
 826     }
 827
 828   glEnable(GL_DEPTH_TEST);
 829   glEnable(GL_LIGHTING);
 830   glMatrixMode(GL_PROJECTION);
 831   glPopMatrix();
 832   glMatrixMode(GL_MODELVIEW);
 833   glPopMatrix();
 834 }
 835