src/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 #include <simgear/compiler.h>
  24 #include <simgear/misc/exception.hxx>
  25
  26 #ifdef HAVE_CONFIG_H
  27 #  include <config.h>
  28 #endif
  29
  30 #ifdef HAVE_WINDOWS_H
  31 #  include <windows.h>
  32 #endif
  33
  34 #ifdef __BORLANDC__
  35 #  define exception c_exception
  36 #endif
  37 #include <math.h>
  38
  39 #include <GL/glut.h>
  40 #include <stdlib.h>
  41 #include STL_STRING
  42 #include STL_FSTREAM
  43
  44 #include <simgear/constants.h>
  45 #include <simgear/debug/logstream.hxx>
  46 #include <simgear/misc/props.hxx>
  47 //#include <simgear/math/fg_random.h>
  48 //#include <simgear/math/polar3d.hxx>
  49
  50 #include <Aircraft/aircraft.hxx>
  51 #include <Autopilot/newauto.hxx>
  52 #include <GUI/gui.h>
  53 #include <Main/globals.hxx>
  54 #include <Main/fg_props.hxx>
  55 #include <Main/viewmgr.hxx>
  56 #ifdef FG_NETWORK_OLK
  57 #include <NetworkOLK/network.h>
  58 #endif
  59 #include <Scenery/scenery.hxx>
  60 //#include <Time/fg_timer.hxx>
  61
  62 #if defined ( __sun__ ) || defined ( __sgi )
  63 extern "C" {
  64   extern void *memmove(void *, const void *, size_t);
  65 }
  66 #endif
  67
  68 #include "hud.hxx"
  69
  70 static char units[5];
  71
  72 // The following routines obtain information concerning the aircraft's
  73 // current state and return it to calling instrument display routines.
  74 // They should eventually be member functions of the aircraft.
  75 //
  76
  77 deque< instr_item * > HUD_deque;
  78
  79 fgTextList         HUD_TextList;
  80 fgLineList         HUD_LineList;
  81 fgLineList         HUD_StippleLineList;
  82
  83 fntRenderer *HUDtext = 0;
  84 float  HUD_TextSize = 0;
  85 int HUD_style = 0;
  86
  87 float HUD_matrix[16];
  88 static float hud_trans_alpha = 0.67f;
  89
  90
  91 //$$$ begin - added, Neetha, 28 Nov 2k
  92
  93 static string   name;
  94 static int              x;
  95 static int              y;
  96 static UINT    width;
  97 static UINT    height;
  98 static float    factor;
  99 static float   span_units;
 100 static float   division_units;
 101 static float   minor_division = 0;
 102 static UINT    screen_hole;
 103 static UINT    lbl_pos;
 104 static bool    working;
 105 static string  loadfn;
 106 static UINT     options;
 107 static float   maxValue;
 108 static float   minValue;
 109 static float   scaling;
 110 static UINT    major_divs;
 111 static UINT    minor_divs;
 112 static UINT    modulator;
 113 static int     dp_showing = 0;
 114 static string  label_format;
 115 static string  prelabel;
 116 static string  postlabel;
 117 static int     justi;
 118 static int              blinking;
 119 static float   maxBankAngle;
 120 static float   maxSlipAngle;
 121 static UINT    gap_width;
 122 static bool     latitude;
 123 static bool     longitude;
 124 static bool     tick_bottom;
 125 static bool     tick_top;
 126 static bool     tick_right;
 127 static bool     tick_left;
 128 static bool     cap_bottom;
 129 static bool     cap_top;
 130 static bool     cap_right;
 131 static bool     cap_left;
 132 static float   marker_off;
 133 static string  type;
 134 static bool    enable_pointer;
 135 static string  type_pointer;
 136 static bool    frl_spot;
 137 static bool     target;
 138 static bool    vel_vector;
 139 static bool    drift;
 140 static bool    alpha;
 141 static bool     energy;
 142 static bool     climb_dive;
 143 static bool     glide;
 144 static float    glide_slope_val;
 145 static bool     worm_energy;
 146 static bool     waypoint;
 147
 148 static FLTFNPTR load_fn;
 149 static fgLabelJust justification;
 150 static const char *pre_label_string  = 0;
 151 static const char *post_label_string = 0;
 152
 153 int readHud( istream &input );
 154 int readInstrument ( const SGPropertyNode * node);
 155 static instr_item * readLadder ( const SGPropertyNode * node);
 156 static instr_item * readCard ( const SGPropertyNode * node);
 157 static instr_item * readLabel( const SGPropertyNode * node);
 158 static instr_item * readTBI( const SGPropertyNode * node);
 159 //$$$ end   - added, Neetha, 28 Nov 2k
 160
 161 void fgHUDalphaInit( void );
 162
 163 class locRECT {
 164   public:
 165     RECT rect;
 166
 167     locRECT( UINT left, UINT top, UINT right, UINT bottom);
 168     RECT get_rect(void) { return rect;}
 169 };
 170
 171 locRECT :: locRECT( UINT left, UINT top, UINT right, UINT bottom)
 172 {
 173   rect.left   =  left;
 174   rect.top    =  top;
 175   rect.right  =  right;
 176   rect.bottom =  bottom;
 177
 178 }
 179 // #define DEBUG
 180
 181 #ifdef OLD_CODE
 182 void drawOneLine( UINT x1, UINT y1, UINT x2, UINT y2)
 183 {
 184   glBegin(GL_LINES);
 185   glVertex2f(x1, y1);
 186   glVertex2f(x2, y2);
 187   glEnd();
 188 }
 189
 190 void drawOneLine( RECT &rect)
 191 {
 192   glBegin(GL_LINES);
 193   glVertex2f(rect.left, rect.top);
 194   glVertex2f(rect.right, rect.bottom);
 195   glEnd();
 196 }
 197
 198 //
 199 // The following code deals with painting the "instrument" on the display
 200 //
 201    /* textString - Bitmap font string */
 202
 203 void textString( int x, int y, char *msg, void *font ){
 204
 205     if(*msg)
 206     {
 207 //      puDrawString (  NULL, msg, x, y );
 208         glRasterPos2f(x, y);
 209         while (*msg) {
 210             glutBitmapCharacter(font, *msg);
 211             msg++;
 212         }
 213     }
 214 }
 215
 216
 217 /* strokeString - Stroke font string */
 218 void strokeString(int x, int y, char *msg, void *font, float theta)
 219 {
 220     int xx;
 221     int yy;
 222     int c;
 223     float sintheta,costheta;
 224
 225
 226     if(*msg)
 227     {
 228     glPushMatrix();
 229     glRotatef(theta * SGD_RADIANS_TO_DEGREES, 0.0, 0.0, 1.0);
 230     sintheta = sin(theta);
 231     costheta = cos(theta);
 232     xx = (int)(x * costheta + y * sintheta);
 233     yy = (int)(y * costheta - x * sintheta);
 234     glTranslatef( xx, yy, 0);
 235     glScalef(.1, .1, 0.0);
 236     while( (c=*msg++) ) {
 237         glutStrokeCharacter(font, c);
 238     }
 239     glPopMatrix();
 240     }
 241 }
 242
 243 int getStringWidth ( char *str )
 244 {
 245     if ( HUDtext && str )
 246     {
 247         float r, l ;
 248         guiFntHandle->getBBox ( str, HUD_TextSize, 0, &l, &r, NULL, NULL ) ;
 249         return FloatToInt( r - l );
 250     }
 251     return 0 ;
 252 }
 253 #endif // OLD_CODE
 254
 255 //========================= End of Class Implementations===================
 256 // fgHUDInit
 257 //
 258 // Constructs a HUD object and then adds in instruments. At the present
 259 // the instruments are hard coded into the routine. Ultimately these need
 260 // to be defined by the aircraft's instrumentation records so that the
 261 // display for a Piper Cub doesn't show the speed range of a North American
 262 // mustange and the engine readouts of a B36!
 263 //
 264
 265 #define INSTRDEFS 21
 266
 267 //$$$ begin - added, Neetha, 28 Nov 2k
 268 static instr_item *
 269 readLadder(const SGPropertyNode * node)
 270 {
 271
 272         instr_item *p;
 273
 274                                 name                    = node->getStringValue("name");
 275                                 x                               = node->getIntValue("x");
 276                                 y                               = node->getIntValue("y");
 277                                 width                   = node->getIntValue("width");
 278                                 height                  = node->getIntValue("height");
 279                                 factor                  = node->getFloatValue("compression_factor");
 280                                 span_units              = node->getFloatValue("span_units");
 281                                 division_units  = node->getFloatValue("division_units");
 282                                 screen_hole             = node->getIntValue("screen_hole");
 283                                 lbl_pos                 = node->getIntValue("lbl_pos");
 284                                 frl_spot                = node->getBoolValue("enable_frl",false);
 285                                 target                  = node->getBoolValue("enable_target_spot",false);
 286                                 vel_vector              = node->getBoolValue("enable_velocity_vector",false);
 287                                 drift                   = node->getBoolValue("enable_drift_marker",false);
 288                                 alpha                   = node->getBoolValue("enable_alpha_bracket",false);
 289                                 energy                  = node->getBoolValue("enable_energy_marker",false);
 290                                 climb_dive              = node->getBoolValue("enable_climb_dive_marker",false);
 291                                 glide                   = node->getBoolValue("enable_glide_slope_marker",false);
 292                                 glide_slope_val = node->getFloatValue("glide_slope",-4.0);
 293                                 worm_energy             = node->getBoolValue("enable_energy_marker",false);
 294                                 waypoint                = node->getBoolValue("enable_waypoint_marker",false);
 295                                 working                 = node->getBoolValue("working");
 296
 297                                 SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
 298
 299
 300                                 p = (instr_item *) new HudLadder( name, x, y,
 301                                         width, height, factor,
 302                                                                                 get_roll, get_pitch,
 303                                                                                 span_units, division_units, minor_division,
 304                                                                                 screen_hole, lbl_pos, frl_spot, target, vel_vector,
 305                                                                                 drift, alpha, energy, climb_dive,
 306                                                                                 glide, glide_slope_val, worm_energy,
 307                                                                                 waypoint, working);
 308
 309                                 return p;
 310
 311 } //end readLadder
 312
 313 static instr_item *
 314 readCard(const SGPropertyNode * node)
 315 {
 316
 317         instr_item *p;
 318
 319                                 name                    = node->getStringValue("name");
 320                                 x                               = node->getIntValue("x");
 321                                 y                               = node->getIntValue("y");
 322                                 width                   = node->getIntValue("width");
 323                                 height                  = node->getIntValue("height");
 324                                 loadfn                  = node->getStringValue("loadfn");
 325                                 options                 = node->getIntValue("options");
 326                                 maxValue                = node->getFloatValue("maxValue");
 327                                 minValue                = node->getFloatValue("minValue");
 328                                 scaling                 = node->getFloatValue("disp_scaling");
 329                                 major_divs              = node->getIntValue("major_divs");
 330                                 minor_divs              = node->getIntValue("minor_divs");
 331                                 modulator               = node->getIntValue("modulator");
 332                                 span_units              = node->getFloatValue("value_span");
 333                                 type                    = node->getStringValue("type");
 334                                 tick_bottom         = node->getBoolValue("tick_bottom",false);
 335                                 tick_top                = node->getBoolValue("tick_top",false);
 336                                 tick_right              = node->getBoolValue("tick_right",false);
 337                                 tick_left               = node->getBoolValue("tick_left",false);
 338                                 cap_bottom              = node->getBoolValue("cap_bottom",false);
 339                                 cap_top                 = node->getBoolValue("cap_top",false);
 340                                 cap_right               = node->getBoolValue("cap_right",false);
 341                                 cap_left                = node->getBoolValue("cap_left",false);
 342                                 marker_off              = node->getFloatValue("marker_offset",0.0);
 343                                 enable_pointer  = node->getBoolValue("enable_pointer",true);
 344                                 type_pointer    = node->getStringValue("pointer_type");
 345                                 working                 = node->getBoolValue("working");
 346
 347
 348                                 SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
 349
 350
 351                                 if(type=="guage")
 352                                         span_units = maxValue - minValue;
 353
 354                                 if(loadfn=="anzg")
 355                                         load_fn = get_anzg;
 356                                 else
 357                                 if(loadfn=="heading")
 358                                         load_fn = get_heading;
 359                                 else
 360                                 if(loadfn=="aoa")
 361                                         load_fn = get_aoa;
 362                                 else
 363                                 if(loadfn=="climb")
 364                                         load_fn = get_climb_rate;
 365                                 else
 366                                 if(loadfn=="altitude")
 367                                         load_fn = get_altitude;
 368                                 else
 369                                 if(loadfn=="agl")
 370                                         load_fn = get_agl;
 371                                 else
 372                                 if(loadfn=="speed")
 373                                         load_fn = get_speed;
 374                                 else
 375                                 if(loadfn=="view_direction")
 376                                         load_fn = get_view_direction;
 377                                 else
 378                                 if(loadfn=="aileronval")
 379                                         load_fn = get_aileronval;
 380                                 else
 381                                 if(loadfn=="elevatorval")
 382                                         load_fn = get_elevatorval;
 383                                 else
 384                                 if(loadfn=="rudderval")
 385                                         load_fn = get_rudderval;
 386                                 else
 387                                 if(loadfn=="throttleval")
 388                                         load_fn = get_throttleval;
 389
 390
 391                                 p = (instr_item *) new hud_card(        x,
 392                                                                                                                 y,
 393                                                                                                                 width,
 394                                                                                                                 height,
 395                                                                             load_fn,
 396                                                                                                                 options,
 397                                                                                                                 maxValue, minValue,
 398                                                                                                                 scaling,
 399                                                                                                                 major_divs, minor_divs,
 400                                                                                                                 modulator,
 401                                                                                                                 dp_showing,
 402                                                                                                                 span_units,
 403                                                                                                                 type,
 404                                                                                                                 tick_bottom,
 405                                                                                                                 tick_top,
 406                                                                                                                 tick_right,
 407                                                                                                                 tick_left,
 408                                                                                                                 cap_bottom,
 409                                                                                                                 cap_top,
 410                                                                                                                 cap_right,
 411                                                                                                                 cap_left,
 412                                                                                                                 marker_off,
 413                                                                                                                 enable_pointer,
 414                                                                                                                 type_pointer,
 415                                                                                                                 working);
 416                                         return p;
 417 }// end readCard
 418
 419 static instr_item *
 420 readLabel(const SGPropertyNode * node)
 421 {
 422         instr_item *p;
 423
 424         int font_size = (fgGetInt("/sim/startup/xsize") > 1000) ? LARGE : SMALL;
 425
 426         name                            = node->getStringValue("name");
 427         x                   = node->getIntValue("x");
 428         y                   = node->getIntValue("y");
 429         width               = node->getIntValue("width");
 430         height                          = node->getIntValue("height");
 431         loadfn                          = node->getStringValue("data_source");
 432         label_format            = node->getStringValue("label_format");
 433         prelabel                        = node->getStringValue("pre_label_string");
 434         postlabel                       = node->getStringValue("post_label_string");
 435         scaling                         = node->getFloatValue("scale_data");
 436         options                         = node->getIntValue("options");
 437         justi                           = node->getIntValue("justification");
 438         blinking            = node->getIntValue("blinking");
 439         latitude                        = node->getBoolValue("latitude",false);
 440         longitude                       = node->getBoolValue("longitude",false);
 441         working             = node->getBoolValue("working");
 442
 443
 444         SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
 445
 446
 447         if ( justi == 0 ) {
 448             justification = LEFT_JUST;
 449         } else {
 450             if ( justi == 1 ) {
 451                 justification = CENTER_JUST;
 452             } else {
 453                 if ( justi == 2 ) {
 454                     justification = RIGHT_JUST;
 455                 }
 456             }
 457         }
 458
 459         if ( prelabel == "NULL" ) {
 460             pre_label_string = NULL;
 461         } else {
 462             if ( prelabel == "blank" ) {
 463                 pre_label_string = " ";
 464             } else {
 465                 pre_label_string = prelabel.c_str();
 466             }
 467         }
 468
 469         if ( postlabel == "blank" ) {
 470             post_label_string = " ";
 471         } else {
 472             if ( postlabel == "NULL" ) {
 473                 post_label_string = NULL;
 474             } else {
 475                 if ( postlabel == "units" ) {
 476                     post_label_string = units;
 477                 } else {
 478                     post_label_string = postlabel.c_str();
 479                 }
 480             }
 481         }
 482
 483         if ( loadfn == "aux16" ) {
 484             load_fn = get_aux16;
 485         } else if ( loadfn == "aux17" ) {
 486             load_fn = get_aux17;
 487         } else if ( loadfn == "aux9" ) {
 488             load_fn = get_aux9;
 489         } else if ( loadfn == "aux11" ) {
 490             load_fn = get_aux11;
 491         } else if ( loadfn == "aux12" ) {
 492             load_fn = get_aux12;
 493         } else if ( loadfn == "aux10" ) {
 494             load_fn = get_aux10;
 495         } else if ( loadfn == "aux13" ) {
 496             load_fn = get_aux13;
 497         } else if ( loadfn == "aux14" ) {
 498             load_fn = get_aux14;
 499         } else if ( loadfn == "aux15" ) {
 500             load_fn = get_aux15;
 501         } else if ( loadfn == "aux8" ) {
 502             load_fn = get_aux8;
 503         } else if ( loadfn == "ax" ) {
 504             load_fn = get_Ax;
 505         } else if ( loadfn == "speed" ) {
 506             load_fn = get_speed;
 507         } else if ( loadfn == "mach" ) {
 508             load_fn = get_mach;
 509         } else if ( loadfn == "altitude" ) {
 510             load_fn = get_altitude;
 511         } else if ( loadfn == "agl" ) {
 512             load_fn = get_agl;
 513         } else if ( loadfn == "framerate" ) {
 514             load_fn = get_frame_rate;
 515         } else if ( loadfn == "heading" ) {
 516             load_fn = get_heading;
 517         } else if ( loadfn == "fov" ) {
 518             load_fn = get_fov;
 519         } else if ( loadfn == "vfc_tris_culled" ) {
 520             load_fn = get_vfc_tris_culled;
 521         } else if ( loadfn == "vfc_tris_drawn" ) {
 522             load_fn = get_vfc_tris_drawn;
 523         } else if ( loadfn == "aoa" ) {
 524             load_fn = get_aoa;
 525         } else if ( loadfn == "latitude" ) {
 526             load_fn  = get_latitude;
 527         } else if ( loadfn == "longitude" ) {
 528             load_fn   = get_longitude;
 529         }
 530
 531         p = (instr_item *) new instr_label ( x,
 532                                              y,
 533                                              width,
 534                                              height,
 535                                              load_fn,
 536                                              label_format.c_str(),
 537                                              pre_label_string,
 538                                              post_label_string,
 539                                              scaling,
 540                                              options,
 541                                              justification,
 542                                              font_size,
 543                                              blinking,
 544                                              latitude,
 545                                              longitude,
 546                                              working);
 547
 548         return p;
 549 } // end readLabel
 550
 551 static instr_item *
 552 readTBI(const SGPropertyNode * node)
 553 {
 554
 555         instr_item *p;
 556
 557         name           = node->getStringValue("name");
 558         x              = node->getIntValue("x");
 559         y              = node->getIntValue("y");
 560         width          = node->getIntValue("width");
 561         height         = node->getIntValue("height");
 562         maxBankAngle   = node->getFloatValue("maxBankAngle");
 563         maxSlipAngle   = node->getFloatValue("maxSlipAngle");
 564         gap_width      = node->getIntValue("gap_width");
 565         working        = node->getBoolValue("working");
 566
 567         SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
 568
 569
 570         p = (instr_item *) new fgTBI_instr(     x,
 571                                                 y,
 572                                                 width,
 573                                                 height,
 574                                                 get_roll,
 575                                                 get_sideslip,
 576                                                 maxBankAngle,
 577                                                 maxSlipAngle,
 578                                                 gap_width,
 579                                                 working);
 580
 581         return p;
 582 } //end readTBI
 583
 584
 585 int readInstrument(const SGPropertyNode * node)
 586 {
 587
 588     instr_item *HIptr;
 589
 590     if ( fgGetString("/sim/startup/units") == "feet" ) {
 591         strcpy(units, " ft");
 592     } else {
 593         strcpy(units, " m");
 594     }
 595
 596     const SGPropertyNode * ladder_group = node->getNode("ladders");
 597
 598     if (ladder_group != 0) {
 599         int nLadders = ladder_group->nChildren();
 600         for (int j = 0; j < nLadders; j++) {
 601
 602             HIptr = readLadder(ladder_group->getChild(j));
 603             HUD_deque.insert( HUD_deque.begin(), HIptr);
 604
 605         }// for - ladders
 606     }
 607
 608     const SGPropertyNode * card_group = node->getNode("cards");
 609     if (card_group != 0) {
 610         int nCards = card_group->nChildren();
 611         for (int j = 0; j < nCards; j++) {
 612
 613             HIptr = readCard(card_group->getChild(j));
 614             HUD_deque.insert( HUD_deque.begin(), HIptr);
 615
 616         }//for - cards
 617     }
 618
 619     const SGPropertyNode * label_group = node->getNode("labels");
 620     if (label_group != 0) {
 621         int nLabels = label_group->nChildren();
 622         for (int j = 0; j < nLabels; j++) {
 623
 624             HIptr = readLabel(label_group->getChild(j));
 625             HUD_deque.insert( HUD_deque.begin(), HIptr);
 626
 627         }//for - labels
 628     }
 629
 630     const SGPropertyNode * tbi_group = node->getNode("tbis");
 631     if (tbi_group != 0) {
 632         int nTbis = tbi_group->nChildren();
 633         for (int j = 0; j < nTbis; j++) {
 634
 635             HIptr = readTBI(tbi_group->getChild(j));
 636             HUD_deque.insert( HUD_deque.begin(), HIptr);
 637
 638         }//for - tbis
 639     }
 640     return 0;
 641 }//end readinstrument
 642
 643
 644 int readHud( istream &input )
 645 {
 646
 647     SGPropertyNode root;
 648
 649     try {
 650       readProperties(input, &root);
 651     } catch (const sg_exception &e) {
 652       guiErrorMessage("Error reading HUD: ", e);
 653       return 0;
 654     }
 655
 656
 657     SG_LOG(SG_INPUT, SG_INFO, "Read properties for  " <<
 658            root.getStringValue("name"));
 659
 660
 661     HUD_deque.erase( HUD_deque.begin(), HUD_deque.end());  // empty the HUD deque
 662
 663
 664     SG_LOG(SG_INPUT, SG_INFO, "Reading Hud instruments");
 665
 666     const SGPropertyNode * instrument_group = root.getChild("instruments");
 667     int nInstruments = instrument_group->nChildren();
 668
 669     for (int i = 0; i < nInstruments; i++) {
 670
 671         const SGPropertyNode * node = instrument_group->getChild(i);
 672
 673         SGPath path( globals->get_fg_root() );
 674         path.append(node->getStringValue("path"));
 675
 676         SG_LOG(SG_INPUT, SG_INFO, "Reading Instrument "
 677                << node->getName()
 678                << " from "
 679                << path.str());
 680
 681
 682         SGPropertyNode root2;
 683         try {
 684           readProperties(path.str(), &root2);
 685         } catch (const sg_exception &e) {
 686           guiErrorMessage("Error reading HUD instrument: ", e);
 687           continue;
 688         }
 689         readInstrument(&root2);
 690     }//for loop(i)
 691
 692     return 0;
 693 }
 694
 695
 696 int fgHUDInit( fgAIRCRAFT * /* current_aircraft */ )
 697 {
 698
 699
 700     HUD_style = 1;
 701
 702     SG_LOG( SG_COCKPIT, SG_INFO, "Initializing current aircraft HUD" );
 703
 704     string hud_path =
 705         fgGetString("/sim/hud/path", "Huds/Default/default.xml");
 706     SGPath path(globals->get_fg_root());
 707     path.append(hud_path);
 708
 709     ifstream input(path.c_str());
 710     if (!input.good())
 711         {
 712             SG_LOG(SG_INPUT, SG_ALERT,
 713                    "Cannot read Hud configuration from " << path.str());
 714         }
 715     else
 716         {
 717             readHud(input);
 718             input.close();
 719         }
 720
 721     fgHUDalphaInit();
 722     fgHUDReshape();
 723
 724     return 0;  // For now. Later we may use this for an error code.
 725
 726 }
 727
 728 int fgHUDInit2( fgAIRCRAFT * /* current_aircraft */ )
 729 {
 730
 731     HUD_style = 2;
 732
 733     SG_LOG( SG_COCKPIT, SG_INFO, "Initializing current aircraft HUD" );
 734
 735     SGPath path(globals->get_fg_root());
 736     path.append("Huds/Minimal/default.xml");
 737
 738
 739     ifstream input(path.c_str());
 740     if (!input.good()) {
 741         SG_LOG(SG_INPUT, SG_ALERT,
 742                "Cannot read Hud configuration from " << path.str());
 743     }
 744     else {
 745         readHud(input);
 746         input.close();
 747     }
 748
 749     return 0;  // For now. Later we may use this for an error code.
 750
 751 }
 752 //$$$ End - added, Neetha, 28 Nov 2k
 753
 754 static int global_day_night_switch = DAY;
 755
 756 void HUD_masterswitch( bool incr )
 757 {
 758     if ( fgGetBool("/sim/hud/visibility") ) {
 759         if ( global_day_night_switch == DAY ) {
 760             global_day_night_switch = NIGHT;
 761         } else {
 762             fgSetBool("/sim/hud/visibility", false);
 763         }
 764     } else {
 765         fgSetBool("/sim/hud/visibility", true);
 766         global_day_night_switch = DAY;
 767     }
 768 }
 769
 770 void HUD_brightkey( bool incr_bright )
 771 {
 772     instr_item *pHUDInstr = HUD_deque[0];
 773     int brightness        = pHUDInstr->get_brightness();
 774
 775     if( fgGetBool("/sim/hud/visibility") ) {
 776         if( incr_bright ) {
 777             switch (brightness)
 778                 {
 779                 case BRT_LIGHT:
 780                     brightness = BRT_BLACK;
 781                     break;
 782
 783                 case BRT_MEDIUM:
 784                     brightness = BRT_LIGHT;
 785                     break;
 786
 787                 case BRT_DARK:
 788                     brightness = BRT_MEDIUM;
 789                     break;
 790
 791                 case BRT_BLACK:
 792                     brightness = BRT_DARK;
 793                     break;
 794
 795                 default:
 796                     brightness = BRT_BLACK;
 797                 }
 798         } else {
 799             switch (brightness)
 800                 {
 801                 case BRT_LIGHT:
 802                     brightness = BRT_MEDIUM;
 803                     break;
 804
 805                 case BRT_MEDIUM:
 806                     brightness = BRT_DARK;
 807                     break;
 808
 809                 case BRT_DARK:
 810                     brightness = BRT_BLACK;
 811                     break;
 812
 813                 case BRT_BLACK:
 814                     brightness = BRT_LIGHT;
 815                     break;
 816
 817                 default:
 818                     fgSetBool("/sim/hud/visibility", false);
 819                 }
 820         }
 821     } else {
 822         fgSetBool("/sim/hud/visibility", true);
 823     }
 824
 825     pHUDInstr->SetBrightness( brightness );
 826 }
 827
 828
 829 #define fgAP_CLAMP(val,min,max) ( (val) = (val) > (max) ? (max) : (val) < (min) ? (min) : (val) )
 830
 831 static puDialogBox *HUDalphaDialog;
 832 static puText      *HUDalphaText;
 833 static puSlider    *HUDalphaHS0;
 834 //static puText      *HUDtextText;
 835 //static puSlider    *HUDalphaHS1;
 836 static char         SliderText[2][ 8 ];
 837
 838 static void alpha_adj( puObject *hs ) {
 839     float val ;
 840
 841     hs-> getValue ( &val ) ;
 842     fgAP_CLAMP ( val, 0.1, 1.0 ) ;
 843     // printf ( "maxroll_adj( %p ) %f %f\n", hs, val, MaxRollAdjust * val ) ;
 844     hud_trans_alpha = val;
 845     sprintf( SliderText[ 0 ], "%05.2f", hud_trans_alpha );
 846     HUDalphaText -> setLabel ( SliderText[ 0 ] ) ;
 847 }
 848
 849 void fgHUDalphaAdjust( puObject * ) {
 850     fgSetBool("/sim/hud/antialiased", true);
 851     FG_PUSH_PUI_DIALOG( HUDalphaDialog );
 852 }
 853
 854 static void goAwayHUDalphaAdjust (puObject *)
 855 {
 856     FG_POP_PUI_DIALOG( HUDalphaDialog );
 857 }
 858
 859 static void cancelHUDalphaAdjust (puObject *)
 860 {
 861     fgSetBool("/sim/hud/antialiased", false);
 862     FG_POP_PUI_DIALOG( HUDalphaDialog );
 863 }
 864
 865 // Done once at system initialization
 866 void fgHUDalphaInit( void ) {
 867
 868     //  printf("fgHUDalphaInit\n");
 869 #define HORIZONTAL  FALSE
 870
 871     int DialogX = 40;
 872     int DialogY = 100;
 873     int DialogWidth = 240;
 874
 875     char Label[] =  "HUD Adjuster";
 876     char *s;
 877
 878     int labelX = (DialogWidth / 2) -
 879         (puGetStringWidth( puGetDefaultLabelFont(), Label ) / 2);
 880
 881     int nSliders = 1;
 882     int slider_x = 10;
 883     int slider_y = 55;
 884     int slider_width = 220;
 885     int slider_title_x = 15;
 886     int slider_value_x = 160;
 887     float slider_delta = 0.05f;
 888
 889     puFont HUDalphaLegendFont;
 890     puFont HUDalphaLabelFont;
 891     puGetDefaultFonts ( &HUDalphaLegendFont, &HUDalphaLabelFont );
 892
 893     HUDalphaDialog = new puDialogBox ( DialogX, DialogY ); {
 894         int horiz_slider_height = puGetStringHeight (HUDalphaLabelFont) +
 895             puGetStringDescender (HUDalphaLabelFont) +
 896             PUSTR_TGAP + PUSTR_BGAP + 5;
 897
 898         /* puFrame *
 899             HUDalphaFrame = new puFrame ( 0, 0, DialogWidth,
 900                                           85 + nSliders
 901                                           * horiz_slider_height ); */
 902
 903         puText *
 904             HUDalphaDialogMessage = new puText ( labelX,
 905                                                  52 + nSliders
 906                                                  * horiz_slider_height );
 907         HUDalphaDialogMessage -> setDefaultValue ( Label );
 908         HUDalphaDialogMessage -> getDefaultValue ( &s );
 909         HUDalphaDialogMessage -> setLabel        ( s );
 910
 911         HUDalphaHS0 = new puSlider ( slider_x, slider_y,
 912                                      slider_width, HORIZONTAL ) ;
 913         HUDalphaHS0->     setDelta ( slider_delta ) ;
 914         HUDalphaHS0->     setValue ( hud_trans_alpha ) ;
 915         HUDalphaHS0->    setCBMode ( PUSLIDER_DELTA ) ;
 916         HUDalphaHS0->  setCallback ( alpha_adj ) ;
 917
 918         puText *
 919             HUDalphaTitle =      new puText ( slider_title_x, slider_y ) ;
 920         HUDalphaTitle-> setDefaultValue ( "Alpha" ) ;
 921         HUDalphaTitle-> getDefaultValue ( &s ) ;
 922         HUDalphaTitle->        setLabel ( s ) ;
 923
 924         HUDalphaText = new puText ( slider_value_x, slider_y ) ;
 925         sprintf( SliderText[ 0 ], "%05.2f", hud_trans_alpha );
 926         HUDalphaText-> setLabel ( SliderText[ 0 ] ) ;
 927
 928         puOneShot *
 929             HUDalphaOkButton =     new puOneShot ( 10, 10, 60, 45 );
 930         HUDalphaOkButton->         setLegend ( gui_msg_OK );
 931         HUDalphaOkButton-> makeReturnDefault ( TRUE );
 932         HUDalphaOkButton->       setCallback ( goAwayHUDalphaAdjust );
 933
 934         puOneShot *
 935             HUDalphaNoButton = new puOneShot ( 160, 10, 230, 45 );
 936         HUDalphaNoButton->     setLegend ( gui_msg_CANCEL );
 937         HUDalphaNoButton->   setCallback ( cancelHUDalphaAdjust );
 938     }
 939     FG_FINALIZE_PUI_DIALOG( HUDalphaDialog );
 940
 941 #undef HORIZONTAL
 942 }
 943
 944
 945 void fgHUDReshape(void) {
 946     if ( HUDtext ) {
 947         // this chunk of code is not necessarily thread safe if the
 948         // compiler optimizer reorders these statements.  Note that
 949         // "delete ptr" does not set "ptr = NULL".  We have to do that
 950         // ourselves.
 951         fntRenderer *tmp = HUDtext;
 952         HUDtext = NULL;
 953         delete tmp;
 954     }
 955
 956     HUD_TextSize = fgGetInt("/sim/startup/xsize") / 60;
 957     HUD_TextSize = 10;
 958     HUDtext = new fntRenderer();
 959     HUDtext -> setFont      ( guiFntHandle ) ;
 960     HUDtext -> setPointSize ( HUD_TextSize ) ;
 961     HUD_TextList.setFont( HUDtext );
 962 }
 963
 964
 965 static void set_hud_color(float r, float g, float b) {
 966     fgGetBool("/sim/hud/antialiased") ?
 967         glColor4f(r,g,b,hud_trans_alpha) :
 968         glColor3f(r,g,b);
 969 }
 970
 971
 972 // fgUpdateHUD
 973 //
 974 // Performs a once around the list of calls to instruments installed in
 975 // the HUD object with requests for redraw. Kinda. It will when this is
 976 // all C++.
 977 //
 978 void fgUpdateHUD( void ) {
 979
 980     static const float normal_aspect = float(640) / float(480);
 981     // note: win_ratio is Y/X
 982     float current_aspect = 1.0f/globals->get_current_view()->get_win_ratio();
 983     if( current_aspect > normal_aspect ) {
 984         float aspect_adjust = current_aspect / normal_aspect;
 985         float adjust = 320.0f*aspect_adjust - 320.0f;
 986         fgUpdateHUD( -adjust, 0.0f, 640.0f+adjust, 480.0f );
 987     } else {
 988         float aspect_adjust = normal_aspect / current_aspect;
 989         float adjust = 240.0f*aspect_adjust - 240.0f;
 990         fgUpdateHUD( 0.0f, -adjust, 640.0f, 480.0f+adjust );
 991     }
 992 }
 993
 994 void fgUpdateHUD( GLfloat x_start, GLfloat y_start,
 995                   GLfloat x_end, GLfloat y_end )
 996 {
 997   int brightness;
 998   // int day_night_sw = current_aircraft.controls->day_night_switch;
 999   int day_night_sw = global_day_night_switch;
1000   int hud_displays = HUD_deque.size();
1001   instr_item *pHUDInstr;
1002   // float line_width;
1003
1004   if( !hud_displays ) {  // Trust everyone, but ALWAYS cut the cards!
1005     return;
1006     }
1007
1008   HUD_TextList.erase();
1009   HUD_LineList.erase();
1010   // HUD_StippleLineList.erase();
1011
1012   pHUDInstr = HUD_deque[0];
1013   brightness = pHUDInstr->get_brightness();
1014   // brightness = HUD_deque.at(0)->get_brightness();
1015
1016   glMatrixMode(GL_PROJECTION);
1017   glPushMatrix();
1018
1019   glLoadIdentity();
1020   gluOrtho2D(x_start, x_end, y_start, y_end);
1021   glMatrixMode(GL_MODELVIEW);
1022   glPushMatrix();
1023   glLoadIdentity();
1024
1025   glDisable(GL_DEPTH_TEST);
1026   glDisable(GL_LIGHTING);
1027
1028   static const SGPropertyNode * antialiased_node
1029       = fgGetNode("/sim/hud/antialiased");
1030
1031   if( antialiased_node->getBoolValue() ) {
1032           glEnable(GL_LINE_SMOOTH);
1033 //        glEnable(GL_BLEND);
1034           glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
1035           glHint(GL_LINE_SMOOTH_HINT,GL_DONT_CARE);
1036 //        glHint(GL_LINE_SMOOTH_HINT,GL_NICEST);
1037           glLineWidth(1.5);
1038   } else {
1039           glLineWidth(1.0);
1040   }
1041
1042   if( day_night_sw == DAY) {
1043       switch (brightness)
1044           {
1045           case BRT_LIGHT:
1046               set_hud_color (0.1f, 0.9f, 0.1f);
1047               break;
1048
1049           case BRT_MEDIUM:
1050               set_hud_color (0.1f, 0.7f, 0.0f);
1051               break;
1052
1053           case BRT_DARK:
1054               set_hud_color (0.0f, 0.6f, 0.0f);
1055               break;
1056
1057           case BRT_BLACK:
1058               set_hud_color( 0.0f, 0.0f, 0.0f);
1059               break;
1060
1061           default:
1062               set_hud_color (0.1f, 0.9f, 0.1f);
1063           }
1064   } else {
1065       if( day_night_sw == NIGHT) {
1066           switch (brightness)
1067               {
1068               case BRT_LIGHT:
1069                   set_hud_color (0.9f, 0.1f, 0.1f);
1070                   break;
1071
1072               case BRT_MEDIUM:
1073                   set_hud_color (0.7f, 0.0f, 0.1f);
1074                   break;
1075
1076               case BRT_DARK:
1077                   set_hud_color (0.6f, 0.0f, 0.0f);
1078                   break;
1079
1080               case BRT_BLACK:
1081                   set_hud_color( 0.0f, 0.0f, 0.0f);
1082                   break;
1083
1084               default:
1085                   set_hud_color (0.6f, 0.0f, 0.0f);
1086               }
1087       } else {     // Just in case default
1088           set_hud_color (0.1f, 0.9f, 0.1f);
1089       }
1090   }
1091
1092   deque < instr_item * > :: iterator current = HUD_deque.begin();
1093   deque < instr_item * > :: iterator last = HUD_deque.end();
1094
1095   for ( ; current != last; ++current ) {
1096           pHUDInstr = *current;
1097
1098           if( pHUDInstr->enabled()) {
1099                   //  fgPrintf( SG_COCKPIT, SG_DEBUG, "HUD Code %d  Status %d\n",
1100                   //            hud->code, hud->status );
1101                   pHUDInstr->draw();
1102
1103           }
1104   }
1105
1106   char *gmt_str = get_formated_gmt_time();
1107   HUD_TextList.add( fgText(40, 10, gmt_str) );
1108
1109 #ifdef FG_NETWORK_OLK
1110   if ( net_hud_display ) {
1111       net_hud_update();
1112   }
1113 #endif
1114
1115
1116   // temporary
1117   // extern bool fgAPAltitudeEnabled( void );
1118   // extern bool fgAPHeadingEnabled( void );
1119   // extern bool fgAPWayPointEnabled( void );
1120   // extern char *fgAPget_TargetDistanceStr( void );
1121   // extern char *fgAPget_TargetHeadingStr( void );
1122   // extern char *fgAPget_TargetAltitudeStr( void );
1123   // extern char *fgAPget_TargetLatLonStr( void );
1124
1125   int apY = 480 - 80;
1126   // char scratch[128];
1127   // HUD_TextList.add( fgText( "AUTOPILOT", 20, apY) );
1128   // apY -= 15;
1129   if( current_autopilot->get_HeadingEnabled() ) {
1130       HUD_TextList.add( fgText( 40, apY,
1131                                 current_autopilot->get_TargetHeadingStr()) );
1132       apY -= 15;
1133   }
1134   if( current_autopilot->get_AltitudeEnabled() ) {
1135       HUD_TextList.add( fgText( 40, apY,
1136                                 current_autopilot->get_TargetAltitudeStr()) );
1137       apY -= 15;
1138   }
1139   if( current_autopilot->get_HeadingMode() ==
1140       FGAutopilot::FG_HEADING_WAYPOINT )
1141   {
1142       char *wpstr;
1143       wpstr = current_autopilot->get_TargetWP1Str();
1144       if ( strlen( wpstr ) ) {
1145           HUD_TextList.add( fgText( 40, apY, wpstr ) );
1146           apY -= 15;
1147       }
1148       wpstr = current_autopilot->get_TargetWP2Str();
1149       if ( strlen( wpstr ) ) {
1150           HUD_TextList.add( fgText( 40, apY, wpstr ) );
1151           apY -= 15;
1152       }
1153       wpstr = current_autopilot->get_TargetWP3Str();
1154       if ( strlen( wpstr ) ) {
1155           HUD_TextList.add( fgText( 40, apY, wpstr ) );
1156           apY -= 15;
1157       }
1158   }
1159
1160   HUD_TextList.draw();
1161
1162   HUD_LineList.draw();
1163
1164   // glEnable(GL_LINE_STIPPLE);
1165   // glLineStipple( 1, 0x00FF );
1166   // HUD_StippleLineList.draw();
1167   // glDisable(GL_LINE_STIPPLE);
1168
1169   if( antialiased_node->getBoolValue() ) {
1170       // glDisable(GL_BLEND);
1171       glDisable(GL_LINE_SMOOTH);
1172       glLineWidth(1.0);
1173   }
1174
1175   glEnable(GL_DEPTH_TEST);
1176   glEnable(GL_LIGHTING);
1177   glMatrixMode(GL_PROJECTION);
1178   glPopMatrix();
1179   glMatrixMode(GL_MODELVIEW);
1180   glPopMatrix();
1181 }
1182