Cockpit/hud.cxx

   1 /**************************************************************************
   2  * hud.cxx -- hud defines and prototypes
   3  *
   4  * Written by Michele America, started September 1997.
   5  *
   6  * Copyright (C) 1997  Michele F. America  - micheleamerica@geocities.com
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of the
  11  * License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  * $Id$
  23  * (Log is kept at end of this file)
  24  **************************************************************************/
  25
  26
  27 #ifdef HAVE_CONFIG_H
  28 #  include <config.h>
  29 #endif
  30
  31 #ifdef HAVE_WINDOWS_H
  32 #  include <windows.h>
  33 #endif
  34
  35 #include <GL/glut.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38
  39 #ifdef HAVE_VALUES_H
  40 #  include <values.h>  // for MAXINT
  41 #endif
  42
  43 #include <Aircraft/aircraft.h>
  44 #include <Debug/fg_debug.h>
  45 #include <Include/fg_constants.h>
  46 #include <Main/options.hxx>
  47 #include <Math/fg_random.h>
  48 #include <Math/mat3.h>
  49 #include <Math/polar3d.hxx>
  50 #include <Scenery/scenery.hxx>
  51 #include <Time/fg_timer.hxx>
  52 #include <Weather/weather.h>
  53
  54 #if defined ( __sun__ ) || defined ( __sgi )
  55 extern "C" {
  56   extern void *memmove(void *, const void *, size_t);
  57 }
  58 #endif
  59
  60 #include "hud.hxx"
  61
  62
  63
  64 // The following routines obtain information concerntin the aircraft's
  65 // current state and return it to calling instrument display routines.
  66 // They should eventually be member functions of the aircraft.
  67 //
  68
  69 deque< instr_item * > HUD_deque;
  70
  71 class locRECT {
  72   public:
  73     RECT rect;
  74
  75     locRECT( UINT left, UINT top, UINT right, UINT bottom);
  76     RECT get_rect(void) { return rect;}
  77 };
  78
  79 locRECT :: locRECT( UINT left, UINT top, UINT right, UINT bottom)
  80 {
  81   rect.left   =  left;
  82   rect.top    =  top;
  83   rect.right  =  right;
  84   rect.bottom =  bottom;
  85
  86 }
  87 // #define DEBUG
  88
  89 void drawOneLine( UINT x1, UINT y1, UINT x2, UINT y2)
  90 {
  91   glBegin(GL_LINES);
  92   glVertex2f(x1, y1);
  93   glVertex2f(x2, y2);
  94   glEnd();
  95 }
  96
  97 void drawOneLine( RECT &rect)
  98 {
  99   glBegin(GL_LINES);
 100   glVertex2f(rect.left, rect.top);
 101   glVertex2f(rect.right, rect.bottom);
 102   glEnd();
 103 }
 104
 105 //
 106 // The following code deals with painting the "instrument" on the display
 107 //
 108    /* textString - Bitmap font string */
 109
 110 void textString( int x, int y, char *msg, void *font ){
 111         glRasterPos2f(x, y);
 112         while (*msg) {
 113                 glutBitmapCharacter(font, *msg);
 114                 msg++;
 115     }
 116 }
 117
 118 /* strokeString - Stroke font string */
 119
 120 void strokeString(int x, int y, char *msg, void *font, float theta)
 121 {
 122 int xx;
 123 int yy;
 124
 125         glPushMatrix();
 126   glRotatef(theta * RAD_TO_DEG, 0.0, 0.0, 1.0);
 127   xx = x * cos(theta) + y * sin( theta );
 128   yy = y * cos(theta) - x * sin( theta );
 129         glTranslatef( xx, yy, 0);
 130         glScalef(.1, .1, 0.0);
 131         while (*msg) {
 132                 glutStrokeCharacter(font, *msg);
 133                 msg++;
 134         }
 135         glPopMatrix();
 136 }
 137
 138 //========================= End of Class Implementations===================
 139 // fgHUDInit
 140 //
 141 // Constructs a HUD object and then adds in instruments. At the present
 142 // the instruments are hard coded into the routine. Ultimately these need
 143 // to be defined by the aircraft's instrumentation records so that the
 144 // display for a Piper Cub doesn't show the speed range of a North American
 145 // mustange and the engine readouts of a B36!
 146 //
 147
 148 #define INSTRDEFS 21
 149
 150 int fgHUDInit( fgAIRCRAFT * /* current_aircraft */ )
 151 {
 152   instr_item *HIptr;
 153   int index;
 154
 155   fgPrintf( FG_COCKPIT, FG_INFO, "Initializing current aircraft HUD\n" );
 156
 157   HUD_deque.erase( HUD_deque.begin(), HUD_deque.end());  // empty the HUD deque
 158
 159 //  hud->code = 1;
 160 //  hud->status = 0;
 161
 162   // For now lets just hardcode the hud here.
 163   // In the future, hud information has to come from the same place
 164   // aircraft information came from.
 165
 166 //  fgHUDSetTimeMode( hud, NIGHT );
 167 //  fgHUDSetBrightness( hud, BRT_LIGHT );
 168
 169   index = 0;
 170
 171   do {
 172     switch ( index ) {
 173       case 0:     // TBI
 174         HIptr = (instr_item *) new fgTBI_instr( 270, 100, 60, 10 );
 175         break;
 176
 177       case 1:     // Artificial Horizon
 178         HIptr = (instr_item *) new HudLadder( 240, 195, 120, 180 );
 179         break;
 180
 181       case 2:    // KIAS
 182         HIptr = (instr_item *) new hud_card( 130,
 183                                              170,
 184                                               28,
 185                                              200,
 186                                              get_speed,
 187                                              HUDS_LEFT | HUDS_VERT,
 188                                              200.0, 0.0,
 189                                              1.0,
 190                                              10,  5,
 191                                              0,
 192                                              0,
 193                                              50.0,
 194                                              true);
 195
 196         break;
 197
 198       case 3:    // Radio Altimeter
 199         HIptr = (instr_item *) new hud_card( 420,
 200                                              195,
 201                                               25,
 202                                              150,
 203                                              get_agl,
 204                                              HUDS_LEFT | HUDS_VERT,
 205                                              1000, 0,
 206                                              1.0,
 207                                              25,    5,
 208                                              0,
 209                                              0,
 210                                              200.0,
 211                                              true);
 212         break;
 213
 214       case 4:    // GYRO COMPASS
 215         HIptr = (instr_item *) new hud_card( 200,
 216                                              375,
 217                                              200,
 218                                               28,
 219                                              get_heading,
 220                                              HUDS_TOP,
 221                                              360, 0,
 222                                                1.0,
 223                                                5,   1,
 224                                              360,
 225                                                0,
 226                                               25,
 227                                              true);
 228         break;
 229
 230       case 5:    // AMSL
 231         HIptr = (instr_item *) new hud_card( 460,
 232                                              170,
 233                                               35,
 234                                              200,
 235                                              get_altitude,
 236                                              HUDS_RIGHT | HUDS_VERT,
 237                                              15000, 0,
 238                                              1.0,
 239                                              100,  25,
 240                                              0,
 241                                              0,
 242                                              250,
 243                                              true);
 244         break;
 245
 246       case 6:
 247         HIptr = (instr_item *) new  guage_instr( 250,            // x
 248                                                  350,            // y
 249                                                  100,            // width
 250                                                   20,            // height
 251                                                  get_aileronval, // data source
 252                                                  HUDS_BOTTOM | HUDS_NOTEXT,
 253                                                  100.0,
 254                                                  +1.0,
 255                                                  -1.0);
 256         break;
 257
 258       case 7:
 259         HIptr = (instr_item *) new  guage_instr( 170,             // x
 260                                                  225,             // y
 261                                                   20,             // width
 262                                                  100,             // height
 263                                                  get_elevatorval, // data source
 264                                                  HUDS_RIGHT | HUDS_VERT | HUDS_NOTEXT,
 265                                                 -100.0,           // Scale data
 266                                                   +1.0,           // Data Range
 267                                                   -1.0);
 268         break;
 269
 270       case 8:
 271         HIptr = (instr_item *) new  guage_instr( 250,             // x
 272                                                  200,             // y
 273                                                  100,             // width
 274                                                   20,             // height
 275                                                  get_rudderval,   // data source
 276                                                  HUDS_TOP | HUDS_NOTEXT,
 277                                                  100.0,
 278                                                  +1.0,
 279                                                  -1.0);
 280         break;
 281
 282       case 9:
 283         HIptr = (instr_item *) new  guage_instr( 100,             // x
 284                                                  190,
 285                                                   20,
 286                                                  160,             // height
 287                                                  get_throttleval, // data source
 288                                                  HUDS_VERT | HUDS_RIGHT | HUDS_NOTEXT,
 289                                                  100.0,
 290                                                    1.0,
 291                                                    0.0);
 292         break;
 293
 294       case 10:    // Digital KIAS
 295         HIptr = (instr_item *) new instr_label ( 110,
 296                                                  150,
 297                                                   40,
 298                                                   30,
 299                                                  get_speed,
 300                                                  "%5.0f",
 301                                                  NULL,
 302                                                  " Kts",
 303                                                  1.0,
 304                                                  HUDS_TOP,
 305                                                  RIGHT_JUST,
 306                                                  SMALL,
 307                                                  0,
 308                                                  TRUE );
 309         break;
 310
 311       case 11:    // Digital Altimeter
 312         HIptr = (instr_item *) new instr_label ( 110,
 313                                                  135,
 314                                                   40,
 315                                                   10,
 316                                                  get_altitude,
 317                                                  "MSL  %5.0f",
 318                                                  NULL,
 319                                                  " m",
 320                                                  1.0,
 321                                                  HUDS_TOP,
 322                                                  LEFT_JUST,
 323                                                  SMALL,
 324                                                  0,
 325                                                  TRUE );
 326         break;
 327
 328       case 12:    // Roll indication diagnostic
 329         HIptr = (instr_item *) new instr_label ( 110,
 330                                                  120,
 331                                                   40,
 332                                                   10,
 333                                                  get_roll,
 334                                                  "%5.2f",
 335                                                  " Roll",
 336                                                  " Deg",
 337                                                  1.0,
 338                                                  HUDS_TOP,
 339                                                  RIGHT_JUST,
 340                                                  SMALL,
 341                                                  0,
 342                                                  TRUE );
 343         break;
 344
 345       case 13:    // Angle of attack diagnostic
 346         HIptr = (instr_item *) new instr_label ( 440,
 347                                                  150,
 348                                                   60,
 349                                                   10,
 350                                                  get_aoa,
 351                                                  "      %5.2f",
 352                                                  "AOA",
 353                                                  " Deg",
 354                                                  1.0,
 355                                                  HUDS_TOP,
 356                                                  RIGHT_JUST,
 357                                                  SMALL,
 358                                                  0,
 359                                                  TRUE );
 360         break;
 361
 362       case 14:
 363         HIptr = (instr_item *) new instr_label ( 440,
 364                                                  135,
 365                                                   60,
 366                                                   10,
 367                                                  get_heading,
 368                                                  " %5.1f",
 369                                                  "Heading ",
 370                                                  " Deg",
 371                                                  1.0,
 372                                                  HUDS_TOP,
 373                                                  RIGHT_JUST,
 374                                                  SMALL,
 375                                                  0,
 376                                                  TRUE );
 377         break;
 378
 379       case 15:
 380         HIptr = (instr_item *) new instr_label ( 440,
 381                                                  120,
 382                                                   60,
 383                                                   10,
 384                                                  get_sideslip,
 385                                                  "%5.2f",
 386                                                  "Sideslip ",
 387                                                  NULL,
 388                                                  1.0,
 389                                                  HUDS_TOP,
 390                                                  RIGHT_JUST,
 391                                                  SMALL,
 392                                                  0,
 393                                                  TRUE );
 394         break;
 395
 396       case 16:
 397         HIptr = (instr_item *) new instr_label( 440,
 398                                                 100,
 399                                                  60,
 400                                                  10,
 401                                                 get_throttleval,
 402                                                 "%5.2f",
 403                                                 "Throttle ",
 404                                                 NULL,
 405                                                  1.0,
 406                                                 HUDS_TOP,
 407                                                 RIGHT_JUST,
 408                                                 SMALL,
 409                                                 0,
 410                                                 TRUE );
 411         break;
 412
 413       case 17:
 414         HIptr = (instr_item *) new instr_label( 440,
 415                                                  85,
 416                                                  60,
 417                                                  10,
 418                                                 get_elevatorval,
 419                                                 "%5.2f",
 420                                                 "Elevator ",
 421                                                 NULL,
 422                                                  1.0,
 423                                                 HUDS_TOP,
 424                                                 RIGHT_JUST,
 425                                                 SMALL,
 426                                                 0,
 427                                                 TRUE );
 428         break;
 429
 430       case 18:
 431         HIptr = (instr_item *) new instr_label( 440,
 432                                                  60,
 433                                                  60,
 434                                                  10,
 435                                                 get_aileronval,
 436                                                 "%5.2f",
 437                                                 "Aileron  ",
 438                                                 NULL,
 439                                                  1.0,
 440                                                 HUDS_TOP,
 441                                                 RIGHT_JUST,
 442                                                 SMALL,
 443                                                 0,
 444                                                 TRUE );
 445         break;
 446
 447
 448       case 19:
 449         HIptr = (instr_item *) new instr_label( 10,
 450                                                 10,
 451                                                 60,
 452                                                 10,
 453                                                  get_frame_rate,
 454                                                 "%.1f",
 455                                                 "Frame rate = ",
 456                                                 NULL,
 457                                                  1.0,
 458                                                 HUDS_TOP,
 459                                                 RIGHT_JUST,
 460                                                 SMALL,
 461                                                 0,
 462                                                 TRUE );
 463         break;
 464
 465       case 20:
 466         HIptr = (instr_item *) new instr_label( 10,
 467                                                 25,
 468                                                 90,
 469                                                 10,
 470                                                  get_vfc_ratio,
 471                                                 "%.2f",
 472                                                 "VFC Ratio = ",
 473                                                 NULL,
 474                                                  1.0,
 475                                                 HUDS_TOP,
 476                                                 RIGHT_JUST,
 477                                                 SMALL,
 478                                                 0,
 479                                                 TRUE );
 480         break;
 481
 482       case 21:
 483         HIptr = (instr_item *) new instr_label( 10,
 484                                                 40,
 485                                                 90,
 486                                                 10,
 487                                                 get_fov,
 488                                                 "%.1f",
 489                                                 "FOV = ",
 490                                                 NULL,
 491                                                  1.0,
 492                                                 HUDS_TOP,
 493                                                 RIGHT_JUST,
 494                                                 SMALL,
 495                                                 0,
 496                                                 TRUE );
 497         break;
 498
 499       default:
 500         HIptr = 0;;
 501       }
 502     if( HIptr ) {                   // Anything to install?
 503       HUD_deque.insert( HUD_deque.begin(), HIptr);
 504       }
 505     index++;
 506     }
 507   while( HIptr );
 508
 509   return 0;  // For now. Later we may use this for an error code.
 510 }
 511
 512 int global_day_night_switch = DAY;
 513
 514 void HUD_brightkey( bool incr_bright )
 515 {
 516 instr_item *pHUDInstr = HUD_deque[0];
 517 int brightness        = pHUDInstr->get_brightness();
 518
 519   if( current_options.get_hud_status() ) {
 520     if( incr_bright ) {
 521       switch (brightness) {
 522         case BRT_LIGHT:
 523               current_options.set_hud_status(0);
 524           break;
 525
 526         case BRT_MEDIUM:
 527           brightness = BRT_LIGHT;
 528           break;
 529
 530         case BRT_DARK:
 531           brightness = BRT_MEDIUM;
 532           break;
 533
 534         case BRT_BLACK:
 535           brightness = BRT_DARK;
 536           break;
 537
 538         default:
 539           brightness = BRT_BLACK;
 540         }
 541       }
 542     else {
 543       switch (brightness) {
 544         case BRT_LIGHT:
 545           brightness = BRT_MEDIUM;
 546           break;
 547
 548         case BRT_MEDIUM:
 549           brightness = BRT_DARK;
 550           break;
 551
 552         case BRT_DARK:
 553           brightness = BRT_BLACK;
 554           break;
 555
 556         case BRT_BLACK:
 557         default:
 558               current_options.set_hud_status(0);
 559         }
 560       }
 561     }
 562   else {
 563     current_options.set_hud_status(1);
 564     if( incr_bright ) {
 565       if( DAY == global_day_night_switch ) {
 566         brightness = BRT_BLACK;
 567         }
 568       else {
 569         brightness = BRT_DARK;
 570         global_day_night_switch = DAY;
 571         }
 572       }
 573     else {
 574       if( NIGHT == global_day_night_switch ) {
 575         brightness = BRT_DARK;
 576         }
 577       else {
 578         brightness = BRT_MEDIUM;
 579         global_day_night_switch = NIGHT;
 580         }
 581       }
 582     }
 583   pHUDInstr->SetBrightness( brightness );
 584 }
 585
 586 // fgUpdateHUD
 587 //
 588 // Performs a once around the list of calls to instruments installed in
 589 // the HUD object with requests for redraw. Kinda. It will when this is
 590 // all C++.
 591 //
 592 void fgUpdateHUD( void ) {
 593   int i;
 594   int brightness;
 595 //  int day_night_sw = current_aircraft.controls->day_night_switch;
 596   int day_night_sw = global_day_night_switch;
 597   int hud_displays = HUD_deque.size();
 598   instr_item *pHUDInstr;
 599
 600   if( !hud_displays ) {  // Trust everyone, but ALWAYS cut the cards!
 601     return;
 602     }
 603
 604   pHUDInstr = HUD_deque[0];
 605   brightness = pHUDInstr->get_brightness();
 606 //  brightness = HUD_deque.at(0)->get_brightness();
 607
 608   glMatrixMode(GL_PROJECTION);
 609   glPushMatrix();
 610
 611   glLoadIdentity();
 612   gluOrtho2D(0, 640, 0, 480);
 613   glMatrixMode(GL_MODELVIEW);
 614   glPushMatrix();
 615   glLoadIdentity();
 616
 617   glColor3f(1.0, 1.0, 1.0);
 618   glIndexi(7);
 619
 620   glDisable(GL_DEPTH_TEST);
 621   glDisable(GL_LIGHTING);
 622
 623   glLineWidth(1);
 624
 625   deque < instr_item * > :: iterator current;
 626   deque < instr_item * > :: iterator last;
 627
 628   current = HUD_deque.begin();
 629   last = HUD_deque.end();
 630   while ( current != last ) {
 631     pHUDInstr = *current;
 632     current++;
 633
 634     // for( i = hud_displays; i; --i) { // Draw everything
 635     // if( HUD_deque.at(i)->enabled()) {
 636     // pHUDInstr = HUD_deque[i - 1];
 637     if( pHUDInstr->enabled()) {
 638                                    // We should to respond to a dial instead
 639                                    // or as well to the of time of day. Of
 640                                    // course, we have no dial!
 641       if( day_night_sw == DAY) {
 642         switch (brightness) {
 643           case BRT_LIGHT:
 644             glColor3f (0.1, 0.9, 0.1);
 645             break;
 646
 647           case BRT_MEDIUM:
 648             glColor3f (0.1, 0.7, 0.0);
 649             break;
 650
 651           case BRT_DARK:
 652             glColor3f (0.0, 0.5, 0.0);
 653             break;
 654
 655           case BRT_BLACK:
 656             glColor3f( 0.0, 0.0, 0.0);
 657             break;
 658
 659           default:;
 660             }
 661           }
 662         else {
 663           if( day_night_sw == NIGHT) {
 664             switch (brightness) {
 665               case BRT_LIGHT:
 666                 glColor3f (0.9, 0.1, 0.1);
 667                 break;
 668
 669               case BRT_MEDIUM:
 670                 glColor3f (0.7, 0.0, 0.1);
 671                 break;
 672
 673               case BRT_DARK:
 674               default:
 675                 glColor3f (0.5, 0.0, 0.0);
 676               }
 677             }
 678           else {     // Just in case default
 679             glColor3f (0.1, 0.9, 0.1);
 680             }
 681           }
 682     //  fgPrintf( FG_COCKPIT, FG_DEBUG, "HUD Code %d  Status %d\n",
 683     //            hud->code, hud->status );
 684       pHUDInstr->draw();
 685 //      HUD_deque.at(i)->draw(); // Responsible for broken or fixed variants.
 686                               // No broken displays honored just now.
 687       }
 688     }
 689
 690   glEnable(GL_DEPTH_TEST);
 691   glEnable(GL_LIGHTING);
 692   glMatrixMode(GL_PROJECTION);
 693   glPopMatrix();
 694   glMatrixMode(GL_MODELVIEW);
 695   glPopMatrix();
 696 }
 697
 698 /* $Log$
 699 /* Revision 1.19  1998/07/30 23:44:05  curt
 700 /* Tweaks for sgi building.
 701 /*
 702  * Revision 1.18  1998/07/20 12:47:55  curt
 703  * Replace the hud rendering for loop (which linearly searches the the hud
 704  * list to find the entry with the proper position) with a simple linear
 705  * traversal using an "iterator."
 706  *
 707  * Revision 1.17  1998/07/13 21:28:02  curt
 708  * Converted the aoa scale to a radio altimeter.
 709  *
 710  * Revision 1.16  1998/07/13 21:00:47  curt
 711  * Integrated Charlies latest HUD updates.
 712  * Wrote access functions for current fgOPTIONS.
 713  *
 714  * Revision 1.15  1998/07/08 14:41:08  curt
 715  * Renamed polar3d.h to polar3d.hxx
 716  *
 717  * Revision 1.14  1998/07/06 21:31:20  curt
 718  * Removed an extraneous ^M.
 719  *
 720  * Revision 1.13  1998/07/03 13:16:28  curt
 721  * Added Charlie Hotchkiss's HUD updates and improvementes.
 722  *
 723  * Revision 1.11  1998/06/05 18:17:10  curt
 724  * Added the declaration of memmove needed by the stl which apparently
 725  * solaris only defines for cc compilations and not for c++ (__STDC__)
 726  *
 727  * Revision 1.10  1998/05/17 16:58:12  curt
 728  * Added a View Frustum Culling ratio display to the hud.
 729  *
 730  * Revision 1.9  1998/05/16 13:04:14  curt
 731  * New updates from Charlie Hotchkiss.
 732  *
 733  * Revision 1.8  1998/05/13 18:27:54  curt
 734  * Added an fov to hud display.
 735  *
 736  * Revision 1.7  1998/05/11 18:13:11  curt
 737  * Complete C++ rewrite of all cockpit code by Charlie Hotchkiss.
 738  *
 739  * Revision 1.22  1998/04/18 04:14:02  curt
 740  * Moved fg_debug.c to it's own library.
 741  *
 742  * Revision 1.21  1998/04/03 21:55:28  curt
 743  * Converting to Gnu autoconf system.
 744  * Tweaks to hud.c
 745  *
 746  * Revision 1.20  1998/03/09 22:48:40  curt
 747  * Minor "formatting" tweaks.
 748  *
 749  * Revision 1.19  1998/02/23 20:18:28  curt
 750  * Incorporated Michele America's hud changes.
 751  *
 752  * Revision 1.18  1998/02/21 14:53:10  curt
 753  * Added Charlie's HUD changes.
 754  *
 755  * Revision 1.17  1998/02/20 00:16:21  curt
 756  * Thursday's tweaks.
 757  *
 758  * Revision 1.16  1998/02/19 13:05:49  curt
 759  * Incorporated some HUD tweaks from Michelle America.
 760  * Tweaked the sky's sunset/rise colors.
 761  * Other misc. tweaks.
 762  *
 763  * Revision 1.15  1998/02/16 13:38:39  curt
 764  * Integrated changes from Charlie Hotchkiss.
 765  *
 766  * Revision 1.14  1998/02/12 21:59:41  curt
 767  * Incorporated code changes contributed by Charlie Hotchkiss
 768  * <chotchkiss@namg.us.anritsu.com>
 769  *
 770  * Revision 1.12  1998/02/09 15:07:48  curt
 771  * Minor tweaks.
 772  *
 773  * Revision 1.11  1998/02/07 15:29:34  curt
 774  * Incorporated HUD changes and struct/typedef changes from Charlie Hotchkiss
 775  * <chotchkiss@namg.us.anritsu.com>
 776  *
 777  * Revision 1.10  1998/02/03 23:20:14  curt
 778  * Lots of little tweaks to fix various consistency problems discovered by
 779  * Solaris' CC.  Fixed a bug in fg_debug.c with how the fgPrintf() wrapper
 780  * passed arguments along to the real printf().  Also incorporated HUD changes
 781  * by Michele America.
 782  *
 783  * Revision 1.9  1998/01/31 00:43:04  curt
 784  * Added MetroWorks patches from Carmen Volpe.
 785  *
 786  * Revision 1.8  1998/01/27 00:47:51  curt
 787  * Incorporated Paul Bleisch's <bleisch@chromatic.com> new debug message
 788  * system and commandline/config file processing code.
 789  *
 790  * Revision 1.7  1998/01/19 18:40:20  curt
 791  * Tons of little changes to clean up the code and to remove fatal errors
 792  * when building with the c++ compiler.
 793  *
 794  * Revision 1.6  1997/12/15 23:54:34  curt
 795  * Add xgl wrappers for debugging.
 796  * Generate terrain normals on the fly.
 797  *
 798  * Revision 1.5  1997/12/10 22:37:39  curt
 799  * Prepended "fg" on the name of all global structures that didn't have it yet.
 800  * i.e. "struct WEATHER {}" became "struct fgWEATHER {}"
 801  *
 802  * Revision 1.4  1997/09/23 00:29:32  curt
 803  * Tweaks to get things to compile with gcc-win32.
 804  *
 805  * Revision 1.3  1997/09/05 14:17:26  curt
 806  * More tweaking with stars.
 807  *
 808  * Revision 1.2  1997/09/04 02:17:30  curt
 809  * Shufflin' stuff.
 810  *
 811  * Revision 1.1  1997/08/29 18:03:22  curt
 812  * Initial revision.
 813  *
 814  */