src/Cockpit/hud.cxx

   1 // hud.cxx -- hud defines and prototypes
   2 //
   3 // Written by Michele America, started September 1997.
   4 //
   5 // Copyright (C) 1997  Michele F. America  - micheleamerica@geocities.com
   6 //
   7 // This program is free software; you can redistribute it and/or
   8 // modify it under the terms of the GNU General Public License as
   9 // published by the Free Software Foundation; either version 2 of the
  10 // License, or (at your option) any later version.
  11 //
  12 // This program is distributed in the hope that it will be useful, but
  13 // WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 // General Public License for more details.
  16 //
  17 // You should have received a copy of the GNU General Public License
  18 // along with this program; if not, write to the Free Software
  19 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 //
  21 // $Id$
  22
  23 #include <simgear/compiler.h>
  24 #include <simgear/misc/exception.hxx>
  25
  26 #ifdef HAVE_CONFIG_H
  27 #  include <config.h>
  28 #endif
  29
  30 #ifdef HAVE_WINDOWS_H
  31 #  include <windows.h>
  32 #endif
  33
  34 #ifdef __BORLANDC__
  35 #  define exception c_exception
  36 #endif
  37 #include <math.h>
  38
  39 #include <GL/glut.h>
  40 #include <stdlib.h>
  41 #include STL_STRING
  42 #include STL_FSTREAM
  43
  44 #include <simgear/constants.h>
  45 #include <simgear/debug/logstream.hxx>
  46 #include <simgear/misc/props.hxx>
  47 //#include <simgear/math/fg_random.h>
  48 //#include <simgear/math/polar3d.hxx>
  49
  50 #include <Aircraft/aircraft.hxx>
  51 #include <Autopilot/newauto.hxx>
  52 #include <GUI/gui.h>
  53 #include <Main/globals.hxx>
  54 #include <Main/fg_props.hxx>
  55 #ifdef FG_NETWORK_OLK
  56 #include <NetworkOLK/network.h>
  57 #endif
  58 #include <Scenery/scenery.hxx>
  59 //#include <Time/fg_timer.hxx>
  60
  61 #if defined ( __sun__ ) || defined ( __sgi )
  62 extern "C" {
  63   extern void *memmove(void *, const void *, size_t);
  64 }
  65 #endif
  66
  67 #include "hud.hxx"
  68
  69 static char units[5];
  70
  71 // The following routines obtain information concerning the aircraft's
  72 // current state and return it to calling instrument display routines.
  73 // They should eventually be member functions of the aircraft.
  74 //
  75
  76 deque< instr_item * > HUD_deque;
  77
  78 fgTextList         HUD_TextList;
  79 fgLineList         HUD_LineList;
  80 fgLineList         HUD_StippleLineList;
  81
  82 fntRenderer *HUDtext = 0;
  83 float  HUD_TextSize = 0;
  84 int HUD_style = 0;
  85
  86 float HUD_matrix[16];
  87 static float hud_trans_alpha = 0.67f;
  88
  89
  90 //$$$ begin - added, Neetha, 28 Nov 2k
  91
  92 static string   name;
  93 static int              x;
  94 static int              y;
  95 static UINT    width;
  96 static UINT    height;
  97 static float    factor;
  98 static float   span_units;
  99 static float   division_units;
 100 static float   minor_division = 0;
 101 static UINT    screen_hole;
 102 static UINT    lbl_pos;
 103 static bool    working;
 104 static string  loadfn;
 105 static UINT     options;
 106 static float   maxValue;
 107 static float   minValue;
 108 static float   scaling;
 109 static UINT    major_divs;
 110 static UINT    minor_divs;
 111 static UINT    modulator;
 112 static int     dp_showing = 0;
 113 static string  label_format;
 114 static string  prelabel;
 115 static string  postlabel;
 116 static int     justi;
 117 static int              blinking;
 118 static float   maxBankAngle;
 119 static float   maxSlipAngle;
 120 static UINT    gap_width;
 121 static bool     latitude;
 122 static bool     longitude;
 123 static bool     tick_bottom;
 124 static bool     tick_top;
 125 static bool     tick_right;
 126 static bool     tick_left;
 127 static bool     cap_bottom;
 128 static bool     cap_top;
 129 static bool     cap_right;
 130 static bool     cap_left;
 131 static float   marker_off;
 132 static string  type;
 133 static bool    enable_pointer;
 134 static string  type_pointer;
 135 static bool    frl_spot;
 136 static bool     target;
 137 static bool    vel_vector;
 138 static bool    drift;
 139 static bool    alpha;
 140 static bool     energy;
 141 static bool     climb_dive;
 142 static bool     glide;
 143 static float    glide_slope_val;
 144 static bool     worm_energy;
 145 static bool     waypoint;
 146 static string type_tick;//hud
 147 static string length_tick;//hud
 148 static bool label_box;//hud
 149 static int digits; //suma
 150 static float radius; //suma
 151 static int divisions; //suma
 152 static int zoom; //suma
 153 static int zenith; //suma
 154 static int nadir ; //suma
 155 static int hat; //suma
 156 static bool tsi; //suma
 157 static float rad; //suma
 158
 159
 160 static FLTFNPTR load_fn;
 161 static fgLabelJust justification;
 162 static const char *pre_label_string  = 0;
 163 static const char *post_label_string = 0;
 164
 165 int readHud( istream &input );
 166 int readInstrument ( const SGPropertyNode * node);
 167 static instr_item * readLadder ( const SGPropertyNode * node);
 168 static instr_item * readCard ( const SGPropertyNode * node);
 169 static instr_item * readLabel( const SGPropertyNode * node);
 170 static instr_item * readTBI( const SGPropertyNode * node);
 171 //$$$ end   - added, Neetha, 28 Nov 2k
 172
 173 void fgHUDalphaInit( void );
 174
 175 class locRECT {
 176   public:
 177     RECT rect;
 178
 179     locRECT( UINT left, UINT top, UINT right, UINT bottom);
 180     RECT get_rect(void) { return rect;}
 181 };
 182
 183 locRECT :: locRECT( UINT left, UINT top, UINT right, UINT bottom)
 184 {
 185   rect.left   =  left;
 186   rect.top    =  top;
 187   rect.right  =  right;
 188   rect.bottom =  bottom;
 189
 190 }
 191 // #define DEBUG
 192
 193 #ifdef OLD_CODE
 194 void drawOneLine( UINT x1, UINT y1, UINT x2, UINT y2)
 195 {
 196   glBegin(GL_LINES);
 197   glVertex2f(x1, y1);
 198   glVertex2f(x2, y2);
 199   glEnd();
 200 }
 201
 202 void drawOneLine( RECT &rect)
 203 {
 204   glBegin(GL_LINES);
 205   glVertex2f(rect.left, rect.top);
 206   glVertex2f(rect.right, rect.bottom);
 207   glEnd();
 208 }
 209
 210 //
 211 // The following code deals with painting the "instrument" on the display
 212 //
 213    /* textString - Bitmap font string */
 214
 215 void textString( int x, int y, char *msg, void *font,int digit) //suma
 216 {
 217
 218     if(*msg)
 219     {
 220 //      puDrawString (  NULL, msg, x, y );
 221         glRasterPos2f(x, y);
 222         while (*msg) {
 223             glutBitmapCharacter(font, *msg);
 224             msg++;
 225         }
 226     }
 227 }
 228
 229
 230 /* strokeString - Stroke font string */
 231 void strokeString(int x, int y, char *msg, void *font, float theta)
 232 {
 233     int xx;
 234     int yy;
 235     int c;
 236     float sintheta,costheta;
 237
 238
 239     if(*msg)
 240     {
 241     glPushMatrix();
 242     glRotatef(theta * SGD_RADIANS_TO_DEGREES, 0.0, 0.0, 1.0);
 243     sintheta = sin(theta);
 244     costheta = cos(theta);
 245     xx = (int)(x * costheta + y * sintheta);
 246     yy = (int)(y * costheta - x * sintheta);
 247     glTranslatef( xx, yy, 0);
 248     glScalef(.1, .1, 0.0);
 249     while( (c=*msg++) ) {
 250         glutStrokeCharacter(font, c);
 251     }
 252     glPopMatrix();
 253     }
 254 }
 255
 256 int getStringWidth ( char *str )
 257 {
 258     if ( HUDtext && str )
 259     {
 260         float r, l ;
 261         guiFntHandle->getBBox ( str, HUD_TextSize, 0, &l, &r, NULL, NULL ) ;
 262         return FloatToInt( r - l );
 263     }
 264     return 0 ;
 265 }
 266 #endif // OLD_CODE
 267
 268 //========================= End of Class Implementations===================
 269 // fgHUDInit
 270 //
 271 // Constructs a HUD object and then adds in instruments. At the present
 272 // the instruments are hard coded into the routine. Ultimately these need
 273 // to be defined by the aircraft's instrumentation records so that the
 274 // display for a Piper Cub doesn't show the speed range of a North American
 275 // mustange and the engine readouts of a B36!
 276 //
 277
 278 #define INSTRDEFS 21
 279
 280 //$$$ begin - added, Neetha, 28 Nov 2k
 281 static instr_item *
 282 readLadder(const SGPropertyNode * node)
 283 {
 284
 285         instr_item *p;
 286
 287                                 name                    = node->getStringValue("name");
 288                                 x                               = node->getIntValue("x");
 289                                 y                               = node->getIntValue("y");
 290                                 width                   = node->getIntValue("width");
 291                                 height                  = node->getIntValue("height");
 292                                 factor                  = node->getFloatValue("compression_factor");
 293                                 span_units              = node->getFloatValue("span_units");
 294                                 division_units  = node->getFloatValue("division_units");
 295                                 screen_hole             = node->getIntValue("screen_hole");
 296                                 lbl_pos                 = node->getIntValue("lbl_pos");
 297                                 frl_spot                = node->getBoolValue("enable_frl",false);
 298                                 target                  = node->getBoolValue("enable_target_spot",false);
 299                                 vel_vector              = node->getBoolValue("enable_velocity_vector",false);
 300                                 drift                   = node->getBoolValue("enable_drift_marker",false);
 301                                 alpha                   = node->getBoolValue("enable_alpha_bracket",false);
 302                                 energy                  = node->getBoolValue("enable_energy_marker",false);
 303                                 climb_dive              = node->getBoolValue("enable_climb_dive_marker",false);
 304                                 glide                   = node->getBoolValue("enable_glide_slope_marker",false);
 305                                 glide_slope_val = node->getFloatValue("glide_slope",-4.0);
 306                                 worm_energy             = node->getBoolValue("enable_energy_marker",false);
 307                                 waypoint                = node->getBoolValue("enable_waypoint_marker",false);
 308                                 working                 = node->getBoolValue("working");
 309                                 zenith                  = node->getIntValue("zenith");  //suma
 310                                 nadir                   = node->getIntValue("nadir");  //suma
 311                                 hat                             = node->getIntValue("hat");
 312
 313
 314                                 SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
 315
 316
 317                                 p = (instr_item *) new HudLadder( name, x, y,
 318                                         width, height, factor,
 319                                                                                 get_roll, get_pitch,
 320                                                                                 span_units, division_units, minor_division,
 321                                                                                 screen_hole, lbl_pos, frl_spot, target, vel_vector,
 322                                                                                 drift, alpha, energy, climb_dive,
 323                                                                                 glide, glide_slope_val, worm_energy,
 324                                                                                 waypoint, working, zenith, nadir, hat);
 325
 326                                 return p;
 327
 328 } //end readLadder
 329
 330 static instr_item *
 331 readCard(const SGPropertyNode * node)
 332 {
 333
 334         instr_item *p;
 335
 336                                 name                    = node->getStringValue("name");
 337                                 x                               = node->getIntValue("x");
 338                                 y                               = node->getIntValue("y");
 339                                 width                   = node->getIntValue("width");
 340                                 height                  = node->getIntValue("height");
 341                                 loadfn                  = node->getStringValue("loadfn");
 342                                 options                 = node->getIntValue("options");
 343                                 maxValue                = node->getFloatValue("maxValue");
 344                                 minValue                = node->getFloatValue("minValue");
 345                                 scaling                 = node->getFloatValue("disp_scaling");
 346                                 major_divs              = node->getIntValue("major_divs");
 347                                 minor_divs              = node->getIntValue("minor_divs");
 348                                 modulator               = node->getIntValue("modulator");
 349                                 span_units              = node->getFloatValue("value_span");
 350                                 type                    = node->getStringValue("type");
 351                                 tick_bottom         = node->getBoolValue("tick_bottom",false);
 352                                 tick_top                = node->getBoolValue("tick_top",false);
 353                                 tick_right              = node->getBoolValue("tick_right",false);
 354                                 tick_left               = node->getBoolValue("tick_left",false);
 355                                 cap_bottom              = node->getBoolValue("cap_bottom",false);
 356                                 cap_top                 = node->getBoolValue("cap_top",false);
 357                                 cap_right               = node->getBoolValue("cap_right",false);
 358                                 cap_left                = node->getBoolValue("cap_left",false);
 359                                 marker_off              = node->getFloatValue("marker_offset",0.0);
 360                                 enable_pointer  = node->getBoolValue("enable_pointer",true);
 361                                 type_pointer    = node->getStringValue("pointer_type");
 362                                 type_tick               = node->getStringValue("tick_type");//hud Can be 'circle' or 'line'
 363                                 length_tick             = node->getStringValue("tick_length");//hud For variable length
 364                                 working                 = node->getBoolValue("working");
 365                 radius                  = node->getFloatValue("radius"); //suma
 366                                 divisions               = node->getIntValue("divisions"); //suma
 367                                 zoom                    = node->getIntValue("zoom"); //suma
 368
 369                                 SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
 370
 371
 372                                 if(type=="gauge")
 373                                         span_units = maxValue - minValue;
 374
 375                                 if(loadfn=="anzg")
 376                                         load_fn = get_anzg;
 377                                 else
 378                                 if(loadfn=="heading")
 379                                         load_fn = get_heading;
 380                                 else
 381                                 if(loadfn=="aoa")
 382                                         load_fn = get_aoa;
 383                                 else
 384                                 if(loadfn=="climb")
 385                                         load_fn = get_climb_rate;
 386                                 else
 387                                 if(loadfn=="altitude")
 388                                         load_fn = get_altitude;
 389                                 else
 390                                 if(loadfn=="agl")
 391                                         load_fn = get_agl;
 392                                 else
 393                                 if(loadfn=="speed")
 394                                         load_fn = get_speed;
 395                                 else
 396                                 if(loadfn=="view_direction")
 397                                         load_fn = get_view_direction;
 398                                 else
 399                                 if(loadfn=="aileronval")
 400                                         load_fn = get_aileronval;
 401                                 else
 402                                 if(loadfn=="elevatorval")
 403                                         load_fn = get_elevatorval;
 404                                 else
 405                                 if(loadfn=="rudderval")
 406                                         load_fn = get_rudderval;
 407                                 else
 408                                 if(loadfn=="throttleval")
 409                                         load_fn = get_throttleval;
 410
 411
 412                                 p = (instr_item *) new hud_card(        x,
 413                                                                                                                 y,
 414                                                                                                                 width,
 415                                                                                                                 height,
 416                                                                             load_fn,
 417                                                                                                                 options,
 418                                                                                                                 maxValue, minValue,
 419                                                                                                                 scaling,
 420                                                                                                                 major_divs, minor_divs,
 421                                                                                                                 modulator,
 422                                                                                                                 dp_showing,
 423                                                                                                                 span_units,
 424                                                                                                                 type,
 425                                                                                                                 tick_bottom,
 426                                                                                                                 tick_top,
 427                                                                                                                 tick_right,
 428                                                                                                                 tick_left,
 429                                                                                                                 cap_bottom,
 430                                                                                                                 cap_top,
 431                                                                                                                 cap_right,
 432                                                                                                                 cap_left,
 433                                                                                                                 marker_off,
 434                                                                                                                 enable_pointer,
 435                                                                                                                 type_pointer,
 436                                                                                                                 type_tick,//hud
 437                                                                                                                 length_tick,//hud
 438                                                                                                                 working,
 439                                                                                                                 radius, //suma
 440                                                                                                                 divisions, //suma
 441                                                                                                                 zoom  //suma
 442                                                                                                                 );
 443                                         return p;
 444 }// end readCard
 445
 446 static instr_item *
 447 readLabel(const SGPropertyNode * node)
 448 {
 449         instr_item *p;
 450
 451         int font_size = (fgGetInt("/sim/startup/xsize") > 1000) ? LARGE : SMALL;
 452
 453         name                            = node->getStringValue("name");
 454         x                   = node->getIntValue("x");
 455         y                   = node->getIntValue("y");
 456         width               = node->getIntValue("width");
 457         height                          = node->getIntValue("height");
 458         loadfn                          = node->getStringValue("data_source");
 459         label_format            = node->getStringValue("label_format");
 460         prelabel                        = node->getStringValue("pre_label_string");
 461         postlabel                       = node->getStringValue("post_label_string");
 462         scaling                         = node->getFloatValue("scale_data");
 463         options                         = node->getIntValue("options");
 464         justi                           = node->getIntValue("justification");
 465         blinking            = node->getIntValue("blinking");
 466         latitude                        = node->getBoolValue("latitude",false);
 467         longitude                       = node->getBoolValue("longitude",false);
 468                 label_box                       = node->getBoolValue("label_box",false);//hud
 469         working             = node->getBoolValue("working");
 470                 digits                          = node->getIntValue("digits"); //suma
 471
 472
 473         SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
 474
 475
 476         if ( justi == 0 ) {
 477             justification = LEFT_JUST;
 478         } else {
 479             if ( justi == 1 ) {
 480                 justification = CENTER_JUST;
 481             } else {
 482                 if ( justi == 2 ) {
 483                     justification = RIGHT_JUST;
 484                 }
 485             }
 486         }
 487
 488         if ( prelabel == "NULL" ) {
 489             pre_label_string = NULL;
 490         } else {
 491             if ( prelabel == "blank" ) {
 492                 pre_label_string = " ";
 493             } else {
 494                 pre_label_string = prelabel.c_str();
 495             }
 496         }
 497
 498         if ( postlabel == "blank" ) {
 499             post_label_string = " ";
 500         } else {
 501             if ( postlabel == "NULL" ) {
 502                 post_label_string = NULL;
 503             } else {
 504                 if ( postlabel == "units" ) {
 505                     post_label_string = units;
 506                 } else {
 507                     post_label_string = postlabel.c_str();
 508                 }
 509             }
 510         }
 511
 512                 if ( loadfn== "aux1" ) {
 513                          load_fn = get_aux1;
 514         } else if ( loadfn == "aux2" ) {
 515             load_fn = get_aux2;
 516         } else if ( loadfn == "aux3" ) {
 517             load_fn = get_aux3;
 518         } else if ( loadfn == "aux4" ) {
 519             load_fn = get_aux4;
 520         } else if ( loadfn == "aux5" ) {
 521             load_fn = get_aux5;
 522         } else if ( loadfn == "aux6" ) {
 523             load_fn = get_aux6;
 524         } else if ( loadfn == "aux7" ) {
 525             load_fn = get_aux7;
 526         } else if ( loadfn == "aux8" ) {
 527             load_fn = get_aux8;
 528         } else if ( loadfn == "aux9" ) {
 529             load_fn = get_aux9;
 530         } else if ( loadfn == "aux10" ) {
 531             load_fn = get_aux10;
 532         } else if ( loadfn == "aux11" ) {
 533             load_fn = get_aux11;
 534         } else if ( loadfn == "aux12" ) {
 535             load_fn = get_aux12;
 536         } else if ( loadfn == "aux13" ) {
 537             load_fn = get_aux13;
 538         } else if ( loadfn == "aux14" ) {
 539             load_fn = get_aux14;
 540         } else if ( loadfn == "aux15" ) {
 541             load_fn = get_aux15;
 542                 } else if ( loadfn == "aux16" ) {
 543             load_fn = get_aux16;
 544         } else if ( loadfn == "aux17" ) {
 545             load_fn = get_aux17;
 546         } else if ( loadfn == "aux18" ) {
 547             load_fn = get_aux18;
 548         } else if ( loadfn == "ax" ) {
 549             load_fn = get_Ax;
 550         } else if ( loadfn == "speed" ) {
 551             load_fn = get_speed;
 552         } else if ( loadfn == "mach" ) {
 553             load_fn = get_mach;
 554         } else if ( loadfn == "altitude" ) {
 555             load_fn = get_altitude;
 556         } else if ( loadfn == "agl" ) {
 557             load_fn = get_agl;
 558         } else if ( loadfn == "framerate" ) {
 559             load_fn = get_frame_rate;
 560         } else if ( loadfn == "heading" ) {
 561             load_fn = get_heading;
 562         } else if ( loadfn == "fov" ) {
 563             load_fn = get_fov;
 564         } else if ( loadfn == "vfc_tris_culled" ) {
 565             load_fn = get_vfc_tris_culled;
 566         } else if ( loadfn == "vfc_tris_drawn" ) {
 567             load_fn = get_vfc_tris_drawn;
 568         } else if ( loadfn == "aoa" ) {
 569             load_fn = get_aoa;
 570         } else if ( loadfn == "latitude" ) {
 571             load_fn  = get_latitude;
 572                 } else if ( loadfn == "anzg" ) {
 573                         load_fn = get_anzg;
 574         } else if ( loadfn == "longitude" ) {
 575             load_fn   = get_longitude;
 576         } else if (loadfn=="throttleval") {
 577                         load_fn = get_throttleval;
 578                 }
 579
 580         p = (instr_item *) new instr_label ( x,
 581                                              y,
 582                                              width,
 583                                              height,
 584                                              load_fn,
 585                                              label_format.c_str(),
 586                                              pre_label_string,
 587                                              post_label_string,
 588                                              scaling,
 589                                              options,
 590                                              justification,
 591                                              font_size,
 592                                              blinking,
 593                                              latitude,
 594                                              longitude,
 595                                                                                          label_box, //hud
 596                                              working,
 597                                                                                          digits); //suma
 598
 599         return p;
 600 } // end readLabel
 601
 602 static instr_item *
 603 readTBI(const SGPropertyNode * node)
 604 {
 605
 606         instr_item *p;
 607
 608         name           = node->getStringValue("name");
 609         x              = node->getIntValue("x");
 610         y              = node->getIntValue("y");
 611         width          = node->getIntValue("width");
 612         height         = node->getIntValue("height");
 613         maxBankAngle   = node->getFloatValue("maxBankAngle");
 614         maxSlipAngle   = node->getFloatValue("maxSlipAngle");
 615         gap_width      = node->getIntValue("gap_width");
 616         working        = node->getBoolValue("working");
 617                 tsi                        = node->getBoolValue("tsi"); //suma
 618                 rad                        = node->getFloatValue("rad"); //suma
 619
 620         SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
 621
 622
 623         p = (instr_item *) new fgTBI_instr(     x,
 624                                                 y,
 625                                                 width,
 626                                                 height,
 627                                                 get_roll,
 628                                                 get_sideslip,
 629                                                 maxBankAngle,
 630                                                 maxSlipAngle,
 631                                                 gap_width,
 632                                                 working,
 633                                                                                                 tsi, //suma
 634                                                                                                 rad); //suma
 635
 636         return p;
 637 } //end readTBI
 638
 639
 640 int readInstrument(const SGPropertyNode * node)
 641 {
 642
 643     instr_item *HIptr;
 644
 645     if ( fgGetString("/sim/startup/units") == "feet" ) {
 646         strcpy(units, " ft");
 647     } else {
 648         strcpy(units, " m");
 649     }
 650
 651     const SGPropertyNode * ladder_group = node->getNode("ladders");
 652
 653     if (ladder_group != 0) {
 654         int nLadders = ladder_group->nChildren();
 655         for (int j = 0; j < nLadders; j++) {
 656
 657             HIptr = readLadder(ladder_group->getChild(j));
 658             HUD_deque.insert( HUD_deque.begin(), HIptr);
 659
 660         }// for - ladders
 661     }
 662
 663     const SGPropertyNode * card_group = node->getNode("cards");
 664     if (card_group != 0) {
 665         int nCards = card_group->nChildren();
 666         for (int j = 0; j < nCards; j++) {
 667
 668             HIptr = readCard(card_group->getChild(j));
 669             HUD_deque.insert( HUD_deque.begin(), HIptr);
 670
 671         }//for - cards
 672     }
 673
 674     const SGPropertyNode * label_group = node->getNode("labels");
 675     if (label_group != 0) {
 676         int nLabels = label_group->nChildren();
 677         for (int j = 0; j < nLabels; j++) {
 678
 679             HIptr = readLabel(label_group->getChild(j));
 680             HUD_deque.insert( HUD_deque.begin(), HIptr);
 681
 682         }//for - labels
 683     }
 684
 685     const SGPropertyNode * tbi_group = node->getNode("tbis");
 686     if (tbi_group != 0) {
 687         int nTbis = tbi_group->nChildren();
 688         for (int j = 0; j < nTbis; j++) {
 689
 690             HIptr = readTBI(tbi_group->getChild(j));
 691             HUD_deque.insert( HUD_deque.begin(), HIptr);
 692
 693         }//for - tbis
 694     }
 695     return 0;
 696 }//end readinstrument
 697
 698
 699 int readHud( istream &input )
 700 {
 701
 702     SGPropertyNode root;
 703
 704     try {
 705       readProperties(input, &root);
 706     } catch (const sg_exception &e) {
 707       guiErrorMessage("Error reading HUD: ", e);
 708       return 0;
 709     }
 710
 711
 712     SG_LOG(SG_INPUT, SG_INFO, "Read properties for  " <<
 713            root.getStringValue("name"));
 714
 715
 716     HUD_deque.erase( HUD_deque.begin(), HUD_deque.end());  // empty the HUD deque
 717
 718
 719     SG_LOG(SG_INPUT, SG_INFO, "Reading Hud instruments");
 720
 721     const SGPropertyNode * instrument_group = root.getChild("instruments");
 722     int nInstruments = instrument_group->nChildren();
 723
 724     for (int i = 0; i < nInstruments; i++) {
 725
 726         const SGPropertyNode * node = instrument_group->getChild(i);
 727
 728         SGPath path( globals->get_fg_root() );
 729         path.append(node->getStringValue("path"));
 730
 731         SG_LOG(SG_INPUT, SG_INFO, "Reading Instrument "
 732                << node->getName()
 733                << " from "
 734                << path.str());
 735
 736
 737         SGPropertyNode root2;
 738         try {
 739             readProperties(path.str(), &root2);
 740         } catch (const sg_exception &e) {
 741             guiErrorMessage("Error reading HUD instrument: ", e);
 742             continue;
 743         }
 744         readInstrument(&root2);
 745     }//for loop(i)
 746
 747     return 0;
 748 }
 749
 750
 751 int fgHUDInit( fgAIRCRAFT * /* current_aircraft */ )
 752 {
 753
 754
 755     HUD_style = 1;
 756
 757     SG_LOG( SG_COCKPIT, SG_INFO, "Initializing current aircraft HUD" );
 758
 759     string hud_path =
 760         fgGetString("/sim/hud/path", "Huds/Default/default.xml");
 761     SGPath path(globals->get_fg_root());
 762     path.append(hud_path);
 763
 764     ifstream input(path.c_str());
 765     if (!input.good())
 766         {
 767             SG_LOG(SG_INPUT, SG_ALERT,
 768                    "Cannot read Hud configuration from " << path.str());
 769         }
 770     else
 771         {
 772             readHud(input);
 773             input.close();
 774         }
 775
 776     fgHUDalphaInit();
 777     fgHUDReshape();
 778
 779     return 0;  // For now. Later we may use this for an error code.
 780
 781 }
 782
 783 int fgHUDInit2( fgAIRCRAFT * /* current_aircraft */ )
 784 {
 785
 786     HUD_style = 2;
 787
 788     SG_LOG( SG_COCKPIT, SG_INFO, "Initializing current aircraft HUD" );
 789
 790     SGPath path(globals->get_fg_root());
 791     path.append("Huds/Minimal/default.xml");
 792
 793
 794     ifstream input(path.c_str());
 795     if (!input.good()) {
 796         SG_LOG(SG_INPUT, SG_ALERT,
 797                "Cannot read Hud configuration from " << path.str());
 798     }
 799     else {
 800         readHud(input);
 801         input.close();
 802     }
 803
 804     return 0;  // For now. Later we may use this for an error code.
 805
 806 }
 807 //$$$ End - added, Neetha, 28 Nov 2k
 808
 809 static int global_day_night_switch = DAY;
 810
 811 void HUD_masterswitch( bool incr )
 812 {
 813     if ( fgGetBool("/sim/hud/visibility") ) {
 814         if ( global_day_night_switch == DAY ) {
 815             global_day_night_switch = NIGHT;
 816         } else {
 817             fgSetBool("/sim/hud/visibility", false);
 818         }
 819     } else {
 820         fgSetBool("/sim/hud/visibility", true);
 821         global_day_night_switch = DAY;
 822     }
 823 }
 824
 825 void HUD_brightkey( bool incr_bright )
 826 {
 827     instr_item *pHUDInstr = HUD_deque[0];
 828     int brightness        = pHUDInstr->get_brightness();
 829
 830     if( fgGetBool("/sim/hud/visibility") ) {
 831         if( incr_bright ) {
 832             switch (brightness)
 833                 {
 834                 case BRT_LIGHT:
 835                     brightness = BRT_BLACK;
 836                     break;
 837
 838                 case BRT_MEDIUM:
 839                     brightness = BRT_LIGHT;
 840                     break;
 841
 842                 case BRT_DARK:
 843                     brightness = BRT_MEDIUM;
 844                     break;
 845
 846                 case BRT_BLACK:
 847                     brightness = BRT_DARK;
 848                     break;
 849
 850                 default:
 851                     brightness = BRT_BLACK;
 852                 }
 853         } else {
 854             switch (brightness)
 855                 {
 856                 case BRT_LIGHT:
 857                     brightness = BRT_MEDIUM;
 858                     break;
 859
 860                 case BRT_MEDIUM:
 861                     brightness = BRT_DARK;
 862                     break;
 863
 864                 case BRT_DARK:
 865                     brightness = BRT_BLACK;
 866                     break;
 867
 868                 case BRT_BLACK:
 869                     brightness = BRT_LIGHT;
 870                     break;
 871
 872                 default:
 873                     fgSetBool("/sim/hud/visibility", false);
 874                 }
 875         }
 876     } else {
 877         fgSetBool("/sim/hud/visibility", true);
 878     }
 879
 880     pHUDInstr->SetBrightness( brightness );
 881 }
 882
 883
 884 #define fgAP_CLAMP(val,min,max) ( (val) = (val) > (max) ? (max) : (val) < (min) ? (min) : (val) )
 885
 886 static puDialogBox *HUDalphaDialog;
 887 static puText      *HUDalphaText;
 888 static puSlider    *HUDalphaHS0;
 889 //static puText      *HUDtextText;
 890 //static puSlider    *HUDalphaHS1;
 891 static char         SliderText[2][ 8 ];
 892
 893 static void alpha_adj( puObject *hs ) {
 894     float val ;
 895
 896     hs-> getValue ( &val ) ;
 897     fgAP_CLAMP ( val, 0.1, 1.0 ) ;
 898     // printf ( "maxroll_adj( %p ) %f %f\n", hs, val, MaxRollAdjust * val ) ;
 899     hud_trans_alpha = val;
 900     sprintf( SliderText[ 0 ], "%05.2f", hud_trans_alpha );
 901     HUDalphaText -> setLabel ( SliderText[ 0 ] ) ;
 902 }
 903
 904 void fgHUDalphaAdjust( puObject * ) {
 905     fgSetBool("/sim/hud/antialiased", true);
 906     FG_PUSH_PUI_DIALOG( HUDalphaDialog );
 907 }
 908
 909 static void goAwayHUDalphaAdjust (puObject *)
 910 {
 911     FG_POP_PUI_DIALOG( HUDalphaDialog );
 912 }
 913
 914 static void cancelHUDalphaAdjust (puObject *)
 915 {
 916     fgSetBool("/sim/hud/antialiased", false);
 917     FG_POP_PUI_DIALOG( HUDalphaDialog );
 918 }
 919
 920 // Done once at system initialization
 921 void fgHUDalphaInit( void ) {
 922
 923     //  printf("fgHUDalphaInit\n");
 924 #define HORIZONTAL  FALSE
 925
 926     int DialogX = 40;
 927     int DialogY = 100;
 928     int DialogWidth = 240;
 929
 930     char Label[] =  "HUD Adjuster";
 931     char *s;
 932
 933     int labelX = (DialogWidth / 2) -
 934         (puGetStringWidth( puGetDefaultLabelFont(), Label ) / 2);
 935
 936     int nSliders = 1;
 937     int slider_x = 10;
 938     int slider_y = 55;
 939     int slider_width = 220;
 940     int slider_title_x = 15;
 941     int slider_value_x = 160;
 942     float slider_delta = 0.05f;
 943
 944     puFont HUDalphaLegendFont;
 945     puFont HUDalphaLabelFont;
 946     puGetDefaultFonts ( &HUDalphaLegendFont, &HUDalphaLabelFont );
 947
 948     HUDalphaDialog = new puDialogBox ( DialogX, DialogY ); {
 949         int horiz_slider_height = puGetStringHeight (HUDalphaLabelFont) +
 950             puGetStringDescender (HUDalphaLabelFont) +
 951             PUSTR_TGAP + PUSTR_BGAP + 5;
 952
 953         /* puFrame *
 954             HUDalphaFrame = new puFrame ( 0, 0, DialogWidth,
 955                                           85 + nSliders
 956                                           * horiz_slider_height ); */
 957
 958         puText *
 959             HUDalphaDialogMessage = new puText ( labelX,
 960                                                  52 + nSliders
 961                                                  * horiz_slider_height );
 962         HUDalphaDialogMessage -> setDefaultValue ( Label );
 963         HUDalphaDialogMessage -> getDefaultValue ( &s );
 964         HUDalphaDialogMessage -> setLabel        ( s );
 965
 966         HUDalphaHS0 = new puSlider ( slider_x, slider_y,
 967                                      slider_width, HORIZONTAL ) ;
 968         HUDalphaHS0->     setDelta ( slider_delta ) ;
 969         HUDalphaHS0->     setValue ( hud_trans_alpha ) ;
 970         HUDalphaHS0->    setCBMode ( PUSLIDER_DELTA ) ;
 971         HUDalphaHS0->  setCallback ( alpha_adj ) ;
 972
 973         puText *
 974             HUDalphaTitle =      new puText ( slider_title_x, slider_y ) ;
 975         HUDalphaTitle-> setDefaultValue ( "Alpha" ) ;
 976         HUDalphaTitle-> getDefaultValue ( &s ) ;
 977         HUDalphaTitle->        setLabel ( s ) ;
 978
 979         HUDalphaText = new puText ( slider_value_x, slider_y ) ;
 980         sprintf( SliderText[ 0 ], "%05.2f", hud_trans_alpha );
 981         HUDalphaText-> setLabel ( SliderText[ 0 ] ) ;
 982
 983         puOneShot *
 984             HUDalphaOkButton =     new puOneShot ( 10, 10, 60, 45 );
 985         HUDalphaOkButton->         setLegend ( gui_msg_OK );
 986         HUDalphaOkButton-> makeReturnDefault ( TRUE );
 987         HUDalphaOkButton->       setCallback ( goAwayHUDalphaAdjust );
 988
 989         puOneShot *
 990             HUDalphaNoButton = new puOneShot ( 160, 10, 230, 45 );
 991         HUDalphaNoButton->     setLegend ( gui_msg_CANCEL );
 992         HUDalphaNoButton->   setCallback ( cancelHUDalphaAdjust );
 993     }
 994     FG_FINALIZE_PUI_DIALOG( HUDalphaDialog );
 995
 996 #undef HORIZONTAL
 997 }
 998
 999
1000 void fgHUDReshape(void) {
1001     if ( HUDtext ) {
1002         // this chunk of code is not necessarily thread safe if the
1003         // compiler optimizer reorders these statements.  Note that
1004         // "delete ptr" does not set "ptr = NULL".  We have to do that
1005         // ourselves.
1006         fntRenderer *tmp = HUDtext;
1007         HUDtext = NULL;
1008         delete tmp;
1009     }
1010
1011     HUD_TextSize = fgGetInt("/sim/startup/xsize") / 60;
1012     HUD_TextSize = 10;
1013     HUDtext = new fntRenderer();
1014     HUDtext -> setFont      ( guiFntHandle ) ;
1015     HUDtext -> setPointSize ( HUD_TextSize ) ;
1016     HUD_TextList.setFont( HUDtext );
1017 }
1018
1019
1020 static void set_hud_color(float r, float g, float b) {
1021     fgGetBool("/sim/hud/antialiased") ?
1022         glColor4f(r,g,b,hud_trans_alpha) :
1023         glColor3f(r,g,b);
1024 }
1025
1026
1027 // fgUpdateHUD
1028 //
1029 // Performs a once around the list of calls to instruments installed in
1030 // the HUD object with requests for redraw. Kinda. It will when this is
1031 // all C++.
1032 //
1033 void fgUpdateHUD( void ) {
1034
1035     static const float normal_aspect = float(640) / float(480);
1036     // note: win_ratio is Y/X
1037     float current_aspect = 1.0f/globals->get_current_view()->get_win_ratio();
1038     if( current_aspect > normal_aspect ) {
1039         float aspect_adjust = current_aspect / normal_aspect;
1040         float adjust = 320.0f*aspect_adjust - 320.0f;
1041         fgUpdateHUD( -adjust, 0.0f, 640.0f+adjust, 480.0f );
1042     } else {
1043         float aspect_adjust = normal_aspect / current_aspect;
1044         float adjust = 240.0f*aspect_adjust - 240.0f;
1045         fgUpdateHUD( 0.0f, -adjust, 640.0f, 480.0f+adjust );
1046     }
1047 }
1048
1049 void fgUpdateHUD( GLfloat x_start, GLfloat y_start,
1050                   GLfloat x_end, GLfloat y_end )
1051 {
1052   int brightness;
1053   // int day_night_sw = current_aircraft.controls->day_night_switch;
1054   int day_night_sw = global_day_night_switch;
1055   int hud_displays = HUD_deque.size();
1056   instr_item *pHUDInstr;
1057   // float line_width;
1058
1059   if( !hud_displays ) {  // Trust everyone, but ALWAYS cut the cards!
1060     return;
1061     }
1062
1063   HUD_TextList.erase();
1064   HUD_LineList.erase();
1065   // HUD_StippleLineList.erase();
1066
1067   pHUDInstr = HUD_deque[0];
1068   brightness = pHUDInstr->get_brightness();
1069   // brightness = HUD_deque.at(0)->get_brightness();
1070
1071   glMatrixMode(GL_PROJECTION);
1072   glPushMatrix();
1073
1074   glLoadIdentity();
1075   gluOrtho2D(x_start, x_end, y_start, y_end);
1076   glMatrixMode(GL_MODELVIEW);
1077   glPushMatrix();
1078   glLoadIdentity();
1079
1080   glDisable(GL_DEPTH_TEST);
1081   glDisable(GL_LIGHTING);
1082
1083   static const SGPropertyNode * antialiased_node
1084       = fgGetNode("/sim/hud/antialiased");
1085
1086   if( antialiased_node->getBoolValue() ) {
1087           glEnable(GL_LINE_SMOOTH);
1088 //        glEnable(GL_BLEND);
1089           glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
1090           glHint(GL_LINE_SMOOTH_HINT,GL_DONT_CARE);
1091           glLineWidth(1.5);
1092   } else {
1093           glLineWidth(1.0);
1094   }
1095
1096   if( day_night_sw == DAY) {
1097       switch (brightness)
1098           {
1099           case BRT_LIGHT:
1100               set_hud_color (0.1f, 0.9f, 0.1f);
1101               break;
1102
1103           case BRT_MEDIUM:
1104               set_hud_color (0.1f, 0.7f, 0.0f);
1105               break;
1106
1107           case BRT_DARK:
1108               set_hud_color (0.0f, 0.6f, 0.0f);
1109               break;
1110
1111           case BRT_BLACK:
1112               set_hud_color( 0.0f, 0.0f, 0.0f);
1113               break;
1114
1115           default:
1116               set_hud_color (0.1f, 0.9f, 0.1f);
1117           }
1118   } else {
1119       if( day_night_sw == NIGHT) {
1120           switch (brightness)
1121               {
1122               case BRT_LIGHT:
1123                   set_hud_color (0.9f, 0.1f, 0.1f);
1124                   break;
1125
1126               case BRT_MEDIUM:
1127                   set_hud_color (0.7f, 0.0f, 0.1f);
1128                   break;
1129
1130               case BRT_DARK:
1131                   set_hud_color (0.6f, 0.0f, 0.0f);
1132                   break;
1133
1134               case BRT_BLACK:
1135                   set_hud_color( 0.0f, 0.0f, 0.0f);
1136                   break;
1137
1138               default:
1139                   set_hud_color (0.6f, 0.0f, 0.0f);
1140               }
1141       } else {     // Just in case default
1142           set_hud_color (0.1f, 0.9f, 0.1f);
1143       }
1144   }
1145
1146   deque < instr_item * > :: iterator current = HUD_deque.begin();
1147   deque < instr_item * > :: iterator last = HUD_deque.end();
1148
1149   for ( ; current != last; ++current ) {
1150           pHUDInstr = *current;
1151
1152           if( pHUDInstr->enabled()) {
1153                   //  fgPrintf( SG_COCKPIT, SG_DEBUG, "HUD Code %d  Status %d\n",
1154                   //            hud->code, hud->status );
1155                   pHUDInstr->draw();
1156
1157           }
1158   }
1159
1160   char *gmt_str = get_formated_gmt_time();
1161   HUD_TextList.add( fgText(40, 10, gmt_str, 0) );
1162
1163 #ifdef FG_NETWORK_OLK
1164   if ( net_hud_display ) {
1165       net_hud_update();
1166   }
1167 #endif
1168
1169
1170   // temporary
1171   // extern bool fgAPAltitudeEnabled( void );
1172   // extern bool fgAPHeadingEnabled( void );
1173   // extern bool fgAPWayPointEnabled( void );
1174   // extern char *fgAPget_TargetDistanceStr( void );
1175   // extern char *fgAPget_TargetHeadingStr( void );
1176   // extern char *fgAPget_TargetAltitudeStr( void );
1177   // extern char *fgAPget_TargetLatLonStr( void );
1178
1179   int apY = 480 - 80;
1180   // char scratch[128];
1181   // HUD_TextList.add( fgText( "AUTOPILOT", 20, apY) );
1182   // apY -= 15;
1183   if( current_autopilot->get_HeadingEnabled() ) {
1184       HUD_TextList.add( fgText( 40, apY,
1185                                 current_autopilot->get_TargetHeadingStr()) );
1186       apY -= 15;
1187   }
1188   if( current_autopilot->get_AltitudeEnabled() ) {
1189       HUD_TextList.add( fgText( 40, apY,
1190                                 current_autopilot->get_TargetAltitudeStr()) );
1191       apY -= 15;
1192   }
1193   if( current_autopilot->get_HeadingMode() ==
1194       FGAutopilot::FG_HEADING_WAYPOINT )
1195   {
1196       char *wpstr;
1197       wpstr = current_autopilot->get_TargetWP1Str();
1198       if ( strlen( wpstr ) ) {
1199           HUD_TextList.add( fgText( 40, apY, wpstr ) );
1200           apY -= 15;
1201       }
1202       wpstr = current_autopilot->get_TargetWP2Str();
1203       if ( strlen( wpstr ) ) {
1204           HUD_TextList.add( fgText( 40, apY, wpstr ) );
1205           apY -= 15;
1206       }
1207       wpstr = current_autopilot->get_TargetWP3Str();
1208       if ( strlen( wpstr ) ) {
1209           HUD_TextList.add( fgText( 40, apY, wpstr ) );
1210           apY -= 15;
1211       }
1212   }
1213
1214   HUD_TextList.draw();
1215
1216   HUD_LineList.draw();
1217
1218   // glEnable(GL_LINE_STIPPLE);
1219   // glLineStipple( 1, 0x00FF );
1220   // HUD_StippleLineList.draw();
1221   // glDisable(GL_LINE_STIPPLE);
1222
1223   if( antialiased_node->getBoolValue() ) {
1224       // glDisable(GL_BLEND);
1225       glDisable(GL_LINE_SMOOTH);
1226       glLineWidth(1.0);
1227   }
1228
1229   glEnable(GL_DEPTH_TEST);
1230   glEnable(GL_LIGHTING);
1231   glMatrixMode(GL_PROJECTION);
1232   glPopMatrix();
1233   glMatrixMode(GL_MODELVIEW);
1234   glPopMatrix();
1235 }
1236