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