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