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 * RAD_TO_DEG, 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                                 FG_LOG(FG_INPUT, FG_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                                 FG_LOG(FG_INPUT, FG_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                                 FG_LOG(FG_INPUT, FG_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                                 if(prelabel=="NULL")
 456                                         pre_label_string = NULL;
 457                                 else
 458                                 if(prelabel=="blank")
 459                                         pre_label_string = " ";
 460                                 else
 461                                         pre_label_string = prelabel.c_str();
 462
 463
 464                                 if(postlabel=="blank")
 465                                         post_label_string = " ";
 466                                 else
 467                                 if(postlabel=="NULL")
 468                                         post_label_string = NULL;
 469                                 else
 470                                 if(postlabel=="units")
 471                                         post_label_string = units;
 472                                 else
 473                                         post_label_string = postlabel.c_str();
 474
 475
 476                                 if(loadfn=="aux16")
 477                                         load_fn = get_aux16;
 478                                 else
 479                                 if(loadfn=="aux17")
 480                                         load_fn = get_aux17;
 481                                 else
 482                                 if(loadfn=="aux9")
 483                                         load_fn = get_aux9;
 484                                 else
 485                                 if(loadfn=="aux11")
 486                                         load_fn = get_aux11;
 487                                 else
 488                                 if(loadfn=="aux12")
 489                                         load_fn = get_aux12;
 490                                 else
 491                                 if(loadfn=="aux10")
 492                                         load_fn = get_aux10;
 493                                 else
 494                                 if(loadfn=="aux13")
 495                                         load_fn = get_aux13;
 496                                 else
 497                                 if(loadfn=="aux14")
 498                                         load_fn = get_aux14;
 499                                 else
 500                                 if(loadfn=="aux15")
 501                                         load_fn = get_aux15;
 502                                 else
 503                                 if(loadfn=="aux8")
 504                                         load_fn = get_aux8;
 505                                 else
 506                                 if(loadfn=="ax")
 507                                         load_fn = get_Ax;
 508                                 else
 509                                 if(loadfn=="speed")
 510                                         load_fn = get_speed;
 511                                 else
 512                                 if(loadfn=="mach")
 513                                         load_fn = get_mach;
 514                                 else
 515                                 if(loadfn=="altitude")
 516                                         load_fn = get_altitude;
 517                                 else
 518                                 if(loadfn=="agl")
 519                                         load_fn = get_agl;
 520                                 else
 521                                 if(loadfn=="framerate")
 522                                         load_fn = get_frame_rate;
 523                                 else
 524                                 if(loadfn=="heading")
 525                                         load_fn = get_heading;
 526                                 else
 527                                 if(loadfn=="fov")
 528                                         load_fn = get_fov;
 529                                 else
 530                                 if(loadfn=="vfc_tris_culled")
 531                                         load_fn = get_vfc_tris_culled;
 532                                 else
 533                                 if(loadfn=="vfc_tris_drawn")
 534                                         load_fn = get_vfc_tris_drawn;
 535                                 else
 536                                 if(loadfn=="aoa")
 537                                         load_fn = get_aoa;
 538                                 else
 539                                 if(loadfn=="latitude")
 540                                         load_fn  = get_latitude;
 541                                 else
 542                                 if(loadfn=="longitude")
 543                                         load_fn   = get_longitude;
 544
 545
 546                                 p = (instr_item *) new instr_label ( x,
 547                                                  y,
 548                                                  width,
 549                                                  height,
 550                                                  load_fn,
 551                                                                                              label_format.c_str(),
 552                                                  pre_label_string,
 553                                                                                                  post_label_string,
 554                                                  scaling,
 555                                                  options,
 556                                                  justification,
 557                                                                                                  font_size,
 558                                                  blinking,
 559                                                                                                  latitude,
 560                                                  longitude,
 561                                                                                                  working);
 562
 563                                 return p;
 564
 565 } // end readLabel
 566
 567 static instr_item *
 568 readTBI(const SGPropertyNode * node)
 569 {
 570
 571         instr_item *p;
 572
 573                                 name           = node->getStringValue("name");
 574                                 x              = node->getIntValue("x");
 575                                 y              = node->getIntValue("y");
 576                                 width          = node->getIntValue("width");
 577                                 height         = node->getIntValue("height");
 578                                 maxBankAngle   = node->getFloatValue("maxBankAngle");
 579                                 maxSlipAngle   = node->getFloatValue("maxSlipAngle");
 580                                 gap_width      = node->getIntValue("gap_width");
 581                                 working        = node->getBoolValue("working");
 582
 583                                 FG_LOG(FG_INPUT, FG_INFO, "Done reading instrument " << name);
 584
 585
 586                                 p = (instr_item *) new fgTBI_instr(     x,
 587                                                                                                                 y,
 588                                                                                                                 width,
 589                                                                                                                 height,
 590                                                                                                                 get_roll,
 591                                                                                                                 get_sideslip,
 592                                                                                                                 maxBankAngle,
 593                                                                                                                 maxSlipAngle,
 594                                                                                                                 gap_width,
 595                                                                                                                 working);
 596
 597                                 return p;
 598 } //end readTBI
 599
 600
 601 int readInstrument(const SGPropertyNode * node)
 602 {
 603
 604         instr_item *HIptr;
 605
 606     if ( fgGetString("/sim/startup/units") == "feet" ) {
 607     strcpy(units, " ft");
 608     } else {
 609     strcpy(units, " m");
 610     }
 611
 612                         const SGPropertyNode * ladder_group = node->getNode("ladders");
 613
 614                         if (ladder_group != 0) {
 615                                 int nLadders = ladder_group->nChildren();
 616                                 for (int j = 0; j < nLadders; j++) {
 617
 618                                         HIptr = readLadder(ladder_group->getChild(j));
 619                                         HUD_deque.insert( HUD_deque.begin(), HIptr);
 620
 621                                 }// for - ladders
 622                         }
 623
 624                         const SGPropertyNode * card_group = node->getNode("cards");
 625                         if (card_group != 0) {
 626                                 int nCards = card_group->nChildren();
 627                                 for (int j = 0; j < nCards; j++) {
 628
 629                                         HIptr = readCard(card_group->getChild(j));
 630                                         HUD_deque.insert( HUD_deque.begin(), HIptr);
 631
 632                                 }//for - cards
 633                         }
 634
 635                         const SGPropertyNode * label_group = node->getNode("labels");
 636                         if (label_group != 0) {
 637                                 int nLabels = label_group->nChildren();
 638                                 for (int j = 0; j < nLabels; j++) {
 639
 640                                         HIptr = readLabel(label_group->getChild(j));
 641                                         HUD_deque.insert( HUD_deque.begin(), HIptr);
 642
 643                                 }//for - labels
 644                         }
 645
 646                         const SGPropertyNode * tbi_group = node->getNode("tbis");
 647                         if (tbi_group != 0) {
 648                                 int nTbis = tbi_group->nChildren();
 649                                 for (int j = 0; j < nTbis; j++) {
 650
 651                                         HIptr = readTBI(tbi_group->getChild(j));
 652                                         HUD_deque.insert( HUD_deque.begin(), HIptr);
 653
 654                                 }//for - tbis
 655                         }
 656  return 0;
 657 }//end readinstrument
 658
 659 int readHud( istream &input )
 660 {
 661
 662         SGPropertyNode root;
 663
 664
 665         if (!readProperties(input, &root)) {
 666                 FG_LOG(FG_INPUT, FG_ALERT, "Malformed property list for hud.");
 667                 return 0;
 668         }
 669
 670
 671         FG_LOG(FG_INPUT, FG_INFO, "Read properties for  " <<
 672                 root.getStringValue("name"));
 673
 674
 675         HUD_deque.erase( HUD_deque.begin(), HUD_deque.end());  // empty the HUD deque
 676
 677
 678         FG_LOG(FG_INPUT, FG_INFO, "Reading Hud instruments");
 679
 680         const SGPropertyNode * instrument_group = root.getChild("instruments");
 681         int nInstruments = instrument_group->nChildren();
 682
 683         for (int i = 0; i < nInstruments; i++) {
 684
 685                 const SGPropertyNode * node = instrument_group->getChild(i);
 686
 687                 FGPath path( globals->get_fg_root() );
 688                 path.append(node->getStringValue("path"));
 689
 690                 FG_LOG(FG_INPUT, FG_INFO, "Reading Instrument "
 691                 << node->getName()
 692                 << " from "
 693                 << path.str());
 694
 695
 696                 SGPropertyNode root2;
 697                 if (readProperties(path.str(), &root2)) {
 698
 699                         readInstrument(&root2);
 700
 701                 }//if
 702         }//for loop(i)
 703  return 0;
 704 }
 705
 706
 707 int fgHUDInit( fgAIRCRAFT * /* current_aircraft */ )
 708 {
 709
 710
 711         HUD_style = 1;
 712
 713         FG_LOG( FG_COCKPIT, FG_INFO, "Initializing current aircraft HUD" );
 714
 715     string hud_path =
 716         fgGetString("/sim/hud/path", "Huds/Default/default.xml");
 717         FGPath path(globals->get_fg_root());
 718         path.append(hud_path);
 719
 720         ifstream input(path.c_str());
 721         if (!input.good())
 722                 {
 723                         FG_LOG(FG_INPUT, FG_ALERT,
 724                         "Cannot read Hud configuration from " << path.str());
 725                 }
 726         else
 727                 {
 728                         readHud(input);
 729                         input.close();
 730                 }
 731
 732         fgHUDalphaInit();
 733         fgHUDReshape();
 734
 735   return 0;  // For now. Later we may use this for an error code.
 736
 737 }
 738
 739 int fgHUDInit2( fgAIRCRAFT * /* current_aircraft */ )
 740 {
 741
 742     HUD_style = 2;
 743
 744     FG_LOG( FG_COCKPIT, FG_INFO, "Initializing current aircraft HUD" );
 745
 746         FGPath path(globals->get_fg_root());
 747         path.append("Huds/Minimal/default.xml");
 748
 749
 750         ifstream input(path.c_str());
 751         if (!input.good()) {
 752                 FG_LOG(FG_INPUT, FG_ALERT,
 753                         "Cannot read Hud configuration from " << path.str());
 754         }
 755         else {
 756                 readHud(input);
 757                 input.close();
 758         }
 759
 760     return 0;  // For now. Later we may use this for an error code.
 761
 762 }
 763 //$$$ End - added, Neetha, 28 Nov 2k
 764
 765 static int global_day_night_switch = DAY;
 766
 767 void HUD_masterswitch( bool incr )
 768 {
 769     if ( fgGetBool("/sim/hud/visibility") ) {
 770         if ( global_day_night_switch == DAY ) {
 771             global_day_night_switch = NIGHT;
 772         } else {
 773             fgSetBool("/sim/hud/visibility", false);
 774         }
 775     } else {
 776         fgSetBool("/sim/hud/visibility", true);
 777         global_day_night_switch = DAY;
 778     }
 779 }
 780
 781 void HUD_brightkey( bool incr_bright )
 782 {
 783     instr_item *pHUDInstr = HUD_deque[0];
 784     int brightness        = pHUDInstr->get_brightness();
 785
 786     if( fgGetBool("/sim/hud/visibility") ) {
 787         if( incr_bright ) {
 788             switch (brightness)
 789                 {
 790                 case BRT_LIGHT:
 791                     brightness = BRT_BLACK;
 792                     break;
 793
 794                 case BRT_MEDIUM:
 795                     brightness = BRT_LIGHT;
 796                     break;
 797
 798                 case BRT_DARK:
 799                     brightness = BRT_MEDIUM;
 800                     break;
 801
 802                 case BRT_BLACK:
 803                     brightness = BRT_DARK;
 804                     break;
 805
 806                 default:
 807                     brightness = BRT_BLACK;
 808                 }
 809         } else {
 810             switch (brightness)
 811                 {
 812                 case BRT_LIGHT:
 813                     brightness = BRT_MEDIUM;
 814                     break;
 815
 816                 case BRT_MEDIUM:
 817                     brightness = BRT_DARK;
 818                     break;
 819
 820                 case BRT_DARK:
 821                     brightness = BRT_BLACK;
 822                     break;
 823
 824                 case BRT_BLACK:
 825                     brightness = BRT_LIGHT;
 826                     break;
 827
 828                 default:
 829                     fgSetBool("/sim/hud/visibility", false);
 830                 }
 831         }
 832     } else {
 833         fgSetBool("/sim/hud/visibility", true);
 834     }
 835
 836     pHUDInstr->SetBrightness( brightness );
 837 }
 838
 839
 840 #define fgAP_CLAMP(val,min,max) ( (val) = (val) > (max) ? (max) : (val) < (min) ? (min) : (val) )
 841
 842 static puDialogBox *HUDalphaDialog;
 843 static puText      *HUDalphaText;
 844 static puSlider    *HUDalphaHS0;
 845 //static puText      *HUDtextText;
 846 //static puSlider    *HUDalphaHS1;
 847 static char         SliderText[2][ 8 ];
 848
 849 static void alpha_adj( puObject *hs ) {
 850         float val ;
 851
 852         hs-> getValue ( &val ) ;
 853         fgAP_CLAMP ( val, 0.1, 1.0 ) ;
 854         //    printf ( "maxroll_adj( %p ) %f %f\n", hs, val, MaxRollAdjust * val ) ;
 855         hud_trans_alpha = val;
 856         sprintf( SliderText[ 0 ], "%05.2f", hud_trans_alpha );
 857         HUDalphaText -> setLabel ( SliderText[ 0 ] ) ;
 858 }
 859
 860 void fgHUDalphaAdjust( puObject * ) {
 861         fgSetBool("/sim/hud/antialiased", true);
 862         FG_PUSH_PUI_DIALOG( HUDalphaDialog );
 863 }
 864
 865 static void goAwayHUDalphaAdjust (puObject *)
 866 {
 867         FG_POP_PUI_DIALOG( HUDalphaDialog );
 868 }
 869
 870 static void cancelHUDalphaAdjust (puObject *)
 871 {
 872         fgSetBool("/sim/hud/antialiased", false);
 873         FG_POP_PUI_DIALOG( HUDalphaDialog );
 874 }
 875
 876 // Done once at system initialization
 877 void fgHUDalphaInit( void ) {
 878
 879         //      printf("fgHUDalphaInit\n");
 880 #define HORIZONTAL  FALSE
 881
 882         int DialogX = 40;
 883         int DialogY = 100;
 884         int DialogWidth = 240;
 885
 886         char Label[] =  "HUD Adjuster";
 887         char *s;
 888
 889         int labelX = (DialogWidth / 2) -
 890                                  (puGetStringWidth( puGetDefaultLabelFont(), Label ) / 2);
 891
 892         int nSliders = 1;
 893         int slider_x = 10;
 894         int slider_y = 55;
 895         int slider_width = 220;
 896         int slider_title_x = 15;
 897         int slider_value_x = 160;
 898         float slider_delta = 0.05f;
 899
 900         puFont HUDalphaLegendFont;
 901         puFont HUDalphaLabelFont;
 902         puGetDefaultFonts ( &HUDalphaLegendFont, &HUDalphaLabelFont );
 903
 904         HUDalphaDialog = new puDialogBox ( DialogX, DialogY ); {
 905                 int horiz_slider_height = puGetStringHeight (HUDalphaLabelFont) +
 906                                                                   puGetStringDescender (HUDalphaLabelFont) +
 907                                                                   PUSTR_TGAP + PUSTR_BGAP + 5;
 908
 909                 puFrame *
 910                 HUDalphaFrame = new puFrame ( 0, 0,
 911                                                                           DialogWidth,
 912                                                                           85 + nSliders * horiz_slider_height );
 913
 914                 puText *
 915                 HUDalphaDialogMessage = new puText ( labelX,
 916                                                                                          52 + nSliders
 917                                                                                          * horiz_slider_height );
 918                 HUDalphaDialogMessage -> setDefaultValue ( Label );
 919                 HUDalphaDialogMessage -> getDefaultValue ( &s );
 920                 HUDalphaDialogMessage -> setLabel        ( s );
 921
 922                 HUDalphaHS0 = new puSlider ( slider_x, slider_y,
 923                                                                          slider_width, HORIZONTAL ) ;
 924                 HUDalphaHS0->     setDelta ( slider_delta ) ;
 925                 HUDalphaHS0->     setValue ( hud_trans_alpha ) ;
 926                 HUDalphaHS0->    setCBMode ( PUSLIDER_DELTA ) ;
 927                 HUDalphaHS0->  setCallback ( alpha_adj ) ;
 928
 929                 puText *
 930                 HUDalphaTitle =      new puText ( slider_title_x, slider_y ) ;
 931                 HUDalphaTitle-> setDefaultValue ( "Alpha" ) ;
 932                 HUDalphaTitle-> getDefaultValue ( &s ) ;
 933                 HUDalphaTitle->        setLabel ( s ) ;
 934
 935                 HUDalphaText = new puText ( slider_value_x, slider_y ) ;
 936                 sprintf( SliderText[ 0 ], "%05.2f", hud_trans_alpha );
 937                 HUDalphaText-> setLabel ( SliderText[ 0 ] ) ;
 938
 939
 940                 puOneShot *
 941                 HUDalphaOkButton =     new puOneShot ( 10, 10, 60, 45 );
 942                 HUDalphaOkButton->         setLegend ( gui_msg_OK );
 943                 HUDalphaOkButton-> makeReturnDefault ( TRUE );
 944                 HUDalphaOkButton->       setCallback ( goAwayHUDalphaAdjust );
 945
 946                 puOneShot *
 947                 HUDalphaNoButton = new puOneShot ( 160, 10, 230, 45 );
 948                 HUDalphaNoButton->     setLegend ( gui_msg_CANCEL );
 949                 HUDalphaNoButton->   setCallback ( cancelHUDalphaAdjust );
 950         }
 951         FG_FINALIZE_PUI_DIALOG( HUDalphaDialog );
 952
 953 #undef HORIZONTAL
 954 }
 955
 956 void fgHUDReshape(void) {
 957         if ( HUDtext )
 958                 delete HUDtext;
 959
 960         HUD_TextSize = fgGetInt("/sim/startup/xsize") / 60;
 961         HUD_TextSize = 10;
 962         HUDtext = new fntRenderer();
 963         HUDtext -> setFont      ( guiFntHandle ) ;
 964         HUDtext -> setPointSize ( HUD_TextSize ) ;
 965         HUD_TextList.setFont( HUDtext );
 966 }
 967
 968
 969 static void set_hud_color(float r, float g, float b) {
 970         fgGetBool("/sim/hud/antialiased") ?
 971                         glColor4f(r,g,b,hud_trans_alpha) :
 972                         glColor3f(r,g,b);
 973 }
 974
 975 // fgUpdateHUD
 976 //
 977 // Performs a once around the list of calls to instruments installed in
 978 // the HUD object with requests for redraw. Kinda. It will when this is
 979 // all C++.
 980 //
 981 void fgUpdateHUD( void ) {
 982   int brightness;
 983 //  int day_night_sw = current_aircraft.controls->day_night_switch;
 984   int day_night_sw = global_day_night_switch;
 985   int hud_displays = HUD_deque.size();
 986   instr_item *pHUDInstr;
 987   float line_width;
 988
 989   if( !hud_displays ) {  // Trust everyone, but ALWAYS cut the cards!
 990     return;
 991     }
 992
 993   HUD_TextList.erase();
 994   HUD_LineList.erase();
 995 //  HUD_StippleLineList.erase();
 996
 997   pHUDInstr = HUD_deque[0];
 998   brightness = pHUDInstr->get_brightness();
 999 //  brightness = HUD_deque.at(0)->get_brightness();
1000
1001   glMatrixMode(GL_PROJECTION);
1002   glPushMatrix();
1003
1004   glLoadIdentity();
1005   gluOrtho2D(0, 640, 0, 480);
1006   glMatrixMode(GL_MODELVIEW);
1007   glPushMatrix();
1008   glLoadIdentity();
1009
1010   glDisable(GL_DEPTH_TEST);
1011   glDisable(GL_LIGHTING);
1012
1013   if( fgGetBool("/sim/hud/antialiased") ) {
1014           glEnable(GL_LINE_SMOOTH);
1015 //        glEnable(GL_BLEND);
1016           glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
1017           glHint(GL_LINE_SMOOTH_HINT,GL_DONT_CARE);
1018           glLineWidth(1.5);
1019   } else {
1020           glLineWidth(1.0);
1021   }
1022
1023   if( day_night_sw == DAY) {
1024       switch (brightness)
1025           {
1026           case BRT_LIGHT:
1027               set_hud_color (0.1f, 0.9f, 0.1f);
1028               break;
1029
1030           case BRT_MEDIUM:
1031               set_hud_color (0.1f, 0.7f, 0.0f);
1032               break;
1033
1034           case BRT_DARK:
1035               set_hud_color (0.0f, 0.6f, 0.0f);
1036               break;
1037
1038           case BRT_BLACK:
1039               set_hud_color( 0.0f, 0.0f, 0.0f);
1040               break;
1041
1042           default:
1043               set_hud_color (0.1f, 0.9f, 0.1f);
1044           }
1045   } else {
1046       if( day_night_sw == NIGHT) {
1047           switch (brightness)
1048               {
1049               case BRT_LIGHT:
1050                   set_hud_color (0.9f, 0.1f, 0.1f);
1051                   break;
1052
1053               case BRT_MEDIUM:
1054                   set_hud_color (0.7f, 0.0f, 0.1f);
1055                   break;
1056
1057               case BRT_DARK:
1058                   set_hud_color (0.6f, 0.0f, 0.0f);
1059                   break;
1060
1061               case BRT_BLACK:
1062                   set_hud_color( 0.0f, 0.0f, 0.0f);
1063                   break;
1064
1065               default:
1066                   set_hud_color (0.6f, 0.0f, 0.0f);
1067               }
1068       } else {     // Just in case default
1069           set_hud_color (0.1f, 0.9f, 0.1f);
1070       }
1071   }
1072
1073   deque < instr_item * > :: iterator current = HUD_deque.begin();
1074   deque < instr_item * > :: iterator last = HUD_deque.end();
1075
1076   for ( ; current != last; ++current ) {
1077           pHUDInstr = *current;
1078
1079           if( pHUDInstr->enabled()) {
1080                   //  fgPrintf( FG_COCKPIT, FG_DEBUG, "HUD Code %d  Status %d\n",
1081                   //            hud->code, hud->status );
1082                   pHUDInstr->draw();
1083
1084           }
1085   }
1086
1087   char *gmt_str = get_formated_gmt_time();
1088   HUD_TextList.add( fgText(40, 10, gmt_str) );
1089
1090 #ifdef FG_NETWORK_OLK
1091   if ( net_hud_display ) {
1092       net_hud_update();
1093   }
1094 #endif
1095
1096
1097   // temporary
1098   // extern bool fgAPAltitudeEnabled( void );
1099   // extern bool fgAPHeadingEnabled( void );
1100   // extern bool fgAPWayPointEnabled( void );
1101   // extern char *fgAPget_TargetDistanceStr( void );
1102   // extern char *fgAPget_TargetHeadingStr( void );
1103   // extern char *fgAPget_TargetAltitudeStr( void );
1104   // extern char *fgAPget_TargetLatLonStr( void );
1105
1106   int apY = 480 - 80;
1107 //  char scratch[128];
1108 //  HUD_TextList.add( fgText( "AUTOPILOT", 20, apY) );
1109 //  apY -= 15;
1110   if( current_autopilot->get_HeadingEnabled() ) {
1111       HUD_TextList.add( fgText( 40, apY,
1112                                 current_autopilot->get_TargetHeadingStr()) );
1113       apY -= 15;
1114   }
1115   if( current_autopilot->get_AltitudeEnabled() ) {
1116       HUD_TextList.add( fgText( 40, apY,
1117                                 current_autopilot->get_TargetAltitudeStr()) );
1118       apY -= 15;
1119   }
1120   if( current_autopilot->get_HeadingMode() ==
1121       FGAutopilot::FG_HEADING_WAYPOINT )
1122   {
1123       char *wpstr;
1124       wpstr = current_autopilot->get_TargetWP1Str();
1125       if ( strlen( wpstr ) ) {
1126           HUD_TextList.add( fgText( 40, apY, wpstr ) );
1127           apY -= 15;
1128       }
1129       wpstr = current_autopilot->get_TargetWP2Str();
1130       if ( strlen( wpstr ) ) {
1131           HUD_TextList.add( fgText( 40, apY, wpstr ) );
1132           apY -= 15;
1133       }
1134       wpstr = current_autopilot->get_TargetWP3Str();
1135       if ( strlen( wpstr ) ) {
1136           HUD_TextList.add( fgText( 40, apY, wpstr ) );
1137           apY -= 15;
1138       }
1139   }
1140
1141   HUD_TextList.draw();
1142
1143   HUD_LineList.draw();
1144
1145 //  glEnable(GL_LINE_STIPPLE);
1146 //  glLineStipple( 1, 0x00FF );
1147 //  HUD_StippleLineList.draw();
1148 //  glDisable(GL_LINE_STIPPLE);
1149
1150   if( fgGetBool("/sim/hud/antialiased") ) {
1151 //        glDisable(GL_BLEND);
1152           glDisable(GL_LINE_SMOOTH);
1153           glLineWidth(1.0);
1154   }
1155
1156   glEnable(GL_DEPTH_TEST);
1157   glEnable(GL_LIGHTING);
1158   glMatrixMode(GL_PROJECTION);
1159   glPopMatrix();
1160   glMatrixMode(GL_MODELVIEW);
1161   glPopMatrix();
1162 }
1163