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                                 if ( (type == "dial") | (type == "tape") ) {
 413                                 p = (instr_item *) new hud_card(        x,
 414                                                                                                                 y,
 415                                                                                                                 width,
 416                                                                                                                 height,
 417                                                                             load_fn,
 418                                                                                                                 options,
 419                                                                                                                 maxValue, minValue,
 420                                                                                                                 scaling,
 421                                                                                                                 major_divs, minor_divs,
 422                                                                                                                 modulator,
 423                                                                                                                 dp_showing,
 424                                                                                                                 span_units,
 425                                                                                                                 type,
 426                                                                                                                 tick_bottom,
 427                                                                                                                 tick_top,
 428                                                                                                                 tick_right,
 429                                                                                                                 tick_left,
 430                                                                                                                 cap_bottom,
 431                                                                                                                 cap_top,
 432                                                                                                                 cap_right,
 433                                                                                                                 cap_left,
 434                                                                                                                 marker_off,
 435                                                                                                                 enable_pointer,
 436                                                                                                                 type_pointer,
 437                                                                                                                 type_tick,//hud
 438                                                                                                                 length_tick,//hud
 439                                                                                                                 working,
 440                                                                                                                 radius, //suma
 441                                                                                                                 divisions, //suma
 442                                                                                                                 zoom  //suma
 443                                                                                                                 );
 444                                 } else {
 445                                 p = (instr_item *) new  gauge_instr( x,            // x
 446                                            y,  // y
 447                                            width,            // width
 448                                            height,            // height
 449                                            load_fn, // data source
 450                                            options,
 451                                            scaling,
 452                                            maxValue,minValue,
 453                                            major_divs, minor_divs,
 454                                                                                    dp_showing,
 455                                                                                    modulator,
 456                                                                                    working);
 457                                 }
 458
 459   return p;
 460 }// end readCard
 461
 462 static instr_item *
 463 readLabel(const SGPropertyNode * node)
 464 {
 465         instr_item *p;
 466
 467         int font_size = (fgGetInt("/sim/startup/xsize") > 1000) ? LARGE : SMALL;
 468
 469         name                            = node->getStringValue("name");
 470         x                   = node->getIntValue("x");
 471         y                   = node->getIntValue("y");
 472         width               = node->getIntValue("width");
 473         height                          = node->getIntValue("height");
 474         loadfn                          = node->getStringValue("data_source");
 475         label_format            = node->getStringValue("label_format");
 476         prelabel                        = node->getStringValue("pre_label_string");
 477         postlabel                       = node->getStringValue("post_label_string");
 478         scaling                         = node->getFloatValue("scale_data");
 479         options                         = node->getIntValue("options");
 480         justi                           = node->getIntValue("justification");
 481         blinking            = node->getIntValue("blinking");
 482         latitude                        = node->getBoolValue("latitude",false);
 483         longitude                       = node->getBoolValue("longitude",false);
 484                 label_box                       = node->getBoolValue("label_box",false);//hud
 485         working             = node->getBoolValue("working");
 486                 digits                          = node->getIntValue("digits"); //suma
 487
 488
 489         SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
 490
 491
 492         if ( justi == 0 ) {
 493             justification = LEFT_JUST;
 494         } else {
 495             if ( justi == 1 ) {
 496                 justification = CENTER_JUST;
 497             } else {
 498                 if ( justi == 2 ) {
 499                     justification = RIGHT_JUST;
 500                 }
 501             }
 502         }
 503
 504         if ( prelabel == "NULL" ) {
 505             pre_label_string = NULL;
 506         } else {
 507             if ( prelabel == "blank" ) {
 508                 pre_label_string = " ";
 509             } else {
 510                 pre_label_string = prelabel.c_str();
 511             }
 512         }
 513
 514         if ( postlabel == "blank" ) {
 515             post_label_string = " ";
 516         } else {
 517             if ( postlabel == "NULL" ) {
 518                 post_label_string = NULL;
 519             } else {
 520                 if ( postlabel == "units" ) {
 521                     post_label_string = units;
 522                 } else {
 523                     post_label_string = postlabel.c_str();
 524                 }
 525             }
 526         }
 527
 528                 if ( loadfn== "aux1" ) {
 529                          load_fn = get_aux1;
 530         } else if ( loadfn == "aux2" ) {
 531             load_fn = get_aux2;
 532         } else if ( loadfn == "aux3" ) {
 533             load_fn = get_aux3;
 534         } else if ( loadfn == "aux4" ) {
 535             load_fn = get_aux4;
 536         } else if ( loadfn == "aux5" ) {
 537             load_fn = get_aux5;
 538         } else if ( loadfn == "aux6" ) {
 539             load_fn = get_aux6;
 540         } else if ( loadfn == "aux7" ) {
 541             load_fn = get_aux7;
 542         } else if ( loadfn == "aux8" ) {
 543             load_fn = get_aux8;
 544         } else if ( loadfn == "aux9" ) {
 545             load_fn = get_aux9;
 546         } else if ( loadfn == "aux10" ) {
 547             load_fn = get_aux10;
 548         } else if ( loadfn == "aux11" ) {
 549             load_fn = get_aux11;
 550         } else if ( loadfn == "aux12" ) {
 551             load_fn = get_aux12;
 552         } else if ( loadfn == "aux13" ) {
 553             load_fn = get_aux13;
 554         } else if ( loadfn == "aux14" ) {
 555             load_fn = get_aux14;
 556         } else if ( loadfn == "aux15" ) {
 557             load_fn = get_aux15;
 558                 } else if ( loadfn == "aux16" ) {
 559             load_fn = get_aux16;
 560         } else if ( loadfn == "aux17" ) {
 561             load_fn = get_aux17;
 562         } else if ( loadfn == "aux18" ) {
 563             load_fn = get_aux18;
 564         } else if ( loadfn == "ax" ) {
 565             load_fn = get_Ax;
 566         } else if ( loadfn == "speed" ) {
 567             load_fn = get_speed;
 568         } else if ( loadfn == "mach" ) {
 569             load_fn = get_mach;
 570         } else if ( loadfn == "altitude" ) {
 571             load_fn = get_altitude;
 572         } else if ( loadfn == "agl" ) {
 573             load_fn = get_agl;
 574         } else if ( loadfn == "framerate" ) {
 575             load_fn = get_frame_rate;
 576         } else if ( loadfn == "heading" ) {
 577             load_fn = get_heading;
 578         } else if ( loadfn == "fov" ) {
 579             load_fn = get_fov;
 580         } else if ( loadfn == "vfc_tris_culled" ) {
 581             load_fn = get_vfc_tris_culled;
 582         } else if ( loadfn == "vfc_tris_drawn" ) {
 583             load_fn = get_vfc_tris_drawn;
 584         } else if ( loadfn == "aoa" ) {
 585             load_fn = get_aoa;
 586         } else if ( loadfn == "latitude" ) {
 587             load_fn  = get_latitude;
 588                 } else if ( loadfn == "anzg" ) {
 589                         load_fn = get_anzg;
 590         } else if ( loadfn == "longitude" ) {
 591             load_fn   = get_longitude;
 592         } else if (loadfn=="throttleval") {
 593                         load_fn = get_throttleval;
 594                 }
 595
 596         p = (instr_item *) new instr_label ( x,
 597                                              y,
 598                                              width,
 599                                              height,
 600                                              load_fn,
 601                                              label_format.c_str(),
 602                                              pre_label_string,
 603                                              post_label_string,
 604                                              scaling,
 605                                              options,
 606                                              justification,
 607                                              font_size,
 608                                              blinking,
 609                                              latitude,
 610                                              longitude,
 611                                                                                          label_box, //hud
 612                                              working,
 613                                                                                          digits); //suma
 614
 615         return p;
 616 } // end readLabel
 617
 618 static instr_item *
 619 readTBI(const SGPropertyNode * node)
 620 {
 621
 622         instr_item *p;
 623
 624         name           = node->getStringValue("name");
 625         x              = node->getIntValue("x");
 626         y              = node->getIntValue("y");
 627         width          = node->getIntValue("width");
 628         height         = node->getIntValue("height");
 629         maxBankAngle   = node->getFloatValue("maxBankAngle");
 630         maxSlipAngle   = node->getFloatValue("maxSlipAngle");
 631         gap_width      = node->getIntValue("gap_width");
 632         working        = node->getBoolValue("working");
 633                 tsi                        = node->getBoolValue("tsi"); //suma
 634                 rad                        = node->getFloatValue("rad"); //suma
 635
 636         SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
 637
 638
 639         p = (instr_item *) new fgTBI_instr(     x,
 640                                                 y,
 641                                                 width,
 642                                                 height,
 643                                                 get_roll,
 644                                                 get_sideslip,
 645                                                 maxBankAngle,
 646                                                 maxSlipAngle,
 647                                                 gap_width,
 648                                                 working,
 649                                                                                                 tsi, //suma
 650                                                                                                 rad); //suma
 651
 652         return p;
 653 } //end readTBI
 654
 655
 656 int readInstrument(const SGPropertyNode * node)
 657 {
 658
 659     instr_item *HIptr;
 660
 661     if ( fgGetString("/sim/startup/units") == "feet" ) {
 662         strcpy(units, " ft");
 663     } else {
 664         strcpy(units, " m");
 665     }
 666
 667     const SGPropertyNode * ladder_group = node->getNode("ladders");
 668
 669     if (ladder_group != 0) {
 670         int nLadders = ladder_group->nChildren();
 671         for (int j = 0; j < nLadders; j++) {
 672
 673             HIptr = readLadder(ladder_group->getChild(j));
 674             HUD_deque.insert( HUD_deque.begin(), HIptr);
 675
 676         }// for - ladders
 677     }
 678
 679     const SGPropertyNode * card_group = node->getNode("cards");
 680     if (card_group != 0) {
 681         int nCards = card_group->nChildren();
 682         for (int j = 0; j < nCards; j++) {
 683
 684             HIptr = readCard(card_group->getChild(j));
 685             HUD_deque.insert( HUD_deque.begin(), HIptr);
 686
 687         }//for - cards
 688     }
 689
 690     const SGPropertyNode * label_group = node->getNode("labels");
 691     if (label_group != 0) {
 692         int nLabels = label_group->nChildren();
 693         for (int j = 0; j < nLabels; j++) {
 694
 695             HIptr = readLabel(label_group->getChild(j));
 696             HUD_deque.insert( HUD_deque.begin(), HIptr);
 697
 698         }//for - labels
 699     }
 700
 701     const SGPropertyNode * tbi_group = node->getNode("tbis");
 702     if (tbi_group != 0) {
 703         int nTbis = tbi_group->nChildren();
 704         for (int j = 0; j < nTbis; j++) {
 705
 706             HIptr = readTBI(tbi_group->getChild(j));
 707             HUD_deque.insert( HUD_deque.begin(), HIptr);
 708
 709         }//for - tbis
 710     }
 711     return 0;
 712 }//end readinstrument
 713
 714
 715 int readHud( istream &input )
 716 {
 717
 718     SGPropertyNode root;
 719
 720     try {
 721       readProperties(input, &root);
 722     } catch (const sg_exception &e) {
 723       guiErrorMessage("Error reading HUD: ", e);
 724       return 0;
 725     }
 726
 727
 728     SG_LOG(SG_INPUT, SG_INFO, "Read properties for  " <<
 729            root.getStringValue("name"));
 730
 731
 732     HUD_deque.erase( HUD_deque.begin(), HUD_deque.end());  // empty the HUD deque
 733
 734
 735     SG_LOG(SG_INPUT, SG_INFO, "Reading Hud instruments");
 736
 737     const SGPropertyNode * instrument_group = root.getChild("instruments");
 738     int nInstruments = instrument_group->nChildren();
 739
 740     for (int i = 0; i < nInstruments; i++) {
 741
 742         const SGPropertyNode * node = instrument_group->getChild(i);
 743
 744         SGPath path( globals->get_fg_root() );
 745         path.append(node->getStringValue("path"));
 746
 747         SG_LOG(SG_INPUT, SG_INFO, "Reading Instrument "
 748                << node->getName()
 749                << " from "
 750                << path.str());
 751
 752
 753         SGPropertyNode root2;
 754         try {
 755             readProperties(path.str(), &root2);
 756         } catch (const sg_exception &e) {
 757             guiErrorMessage("Error reading HUD instrument: ", e);
 758             continue;
 759         }
 760         readInstrument(&root2);
 761     }//for loop(i)
 762
 763     return 0;
 764 }
 765
 766
 767 int fgHUDInit( fgAIRCRAFT * /* current_aircraft */ )
 768 {
 769
 770
 771     HUD_style = 1;
 772
 773     SG_LOG( SG_COCKPIT, SG_INFO, "Initializing current aircraft HUD" );
 774
 775     string hud_path =
 776         fgGetString("/sim/hud/path", "Huds/Default/default.xml");
 777     SGPath path(globals->get_fg_root());
 778     path.append(hud_path);
 779
 780     ifstream input(path.c_str());
 781     if (!input.good())
 782         {
 783             SG_LOG(SG_INPUT, SG_ALERT,
 784                    "Cannot read Hud configuration from " << path.str());
 785         }
 786     else
 787         {
 788             readHud(input);
 789             input.close();
 790         }
 791
 792     fgHUDalphaInit();
 793     fgHUDReshape();
 794
 795     return 0;  // For now. Later we may use this for an error code.
 796
 797 }
 798
 799 int fgHUDInit2( fgAIRCRAFT * /* current_aircraft */ )
 800 {
 801
 802     HUD_style = 2;
 803
 804     SG_LOG( SG_COCKPIT, SG_INFO, "Initializing current aircraft HUD" );
 805
 806     SGPath path(globals->get_fg_root());
 807     path.append("Huds/Minimal/default.xml");
 808
 809
 810     ifstream input(path.c_str());
 811     if (!input.good()) {
 812         SG_LOG(SG_INPUT, SG_ALERT,
 813                "Cannot read Hud configuration from " << path.str());
 814     }
 815     else {
 816         readHud(input);
 817         input.close();
 818     }
 819
 820     return 0;  // For now. Later we may use this for an error code.
 821
 822 }
 823 //$$$ End - added, Neetha, 28 Nov 2k
 824
 825 static int global_day_night_switch = DAY;
 826
 827 void HUD_masterswitch( bool incr )
 828 {
 829     if ( fgGetBool("/sim/hud/visibility") ) {
 830         if ( global_day_night_switch == DAY ) {
 831             global_day_night_switch = NIGHT;
 832         } else {
 833             fgSetBool("/sim/hud/visibility", false);
 834         }
 835     } else {
 836         fgSetBool("/sim/hud/visibility", true);
 837         global_day_night_switch = DAY;
 838     }
 839 }
 840
 841 void HUD_brightkey( bool incr_bright )
 842 {
 843     instr_item *pHUDInstr = HUD_deque[0];
 844     int brightness        = pHUDInstr->get_brightness();
 845
 846     if( fgGetBool("/sim/hud/visibility") ) {
 847         if( incr_bright ) {
 848             switch (brightness)
 849                 {
 850                 case BRT_LIGHT:
 851                     brightness = BRT_BLACK;
 852                     break;
 853
 854                 case BRT_MEDIUM:
 855                     brightness = BRT_LIGHT;
 856                     break;
 857
 858                 case BRT_DARK:
 859                     brightness = BRT_MEDIUM;
 860                     break;
 861
 862                 case BRT_BLACK:
 863                     brightness = BRT_DARK;
 864                     break;
 865
 866                 default:
 867                     brightness = BRT_BLACK;
 868                 }
 869         } else {
 870             switch (brightness)
 871                 {
 872                 case BRT_LIGHT:
 873                     brightness = BRT_MEDIUM;
 874                     break;
 875
 876                 case BRT_MEDIUM:
 877                     brightness = BRT_DARK;
 878                     break;
 879
 880                 case BRT_DARK:
 881                     brightness = BRT_BLACK;
 882                     break;
 883
 884                 case BRT_BLACK:
 885                     brightness = BRT_LIGHT;
 886                     break;
 887
 888                 default:
 889                     fgSetBool("/sim/hud/visibility", false);
 890                 }
 891         }
 892     } else {
 893         fgSetBool("/sim/hud/visibility", true);
 894     }
 895
 896     pHUDInstr->SetBrightness( brightness );
 897 }
 898
 899
 900 #define fgAP_CLAMP(val,min,max) ( (val) = (val) > (max) ? (max) : (val) < (min) ? (min) : (val) )
 901
 902 static puDialogBox *HUDalphaDialog;
 903 static puText      *HUDalphaText;
 904 static puSlider    *HUDalphaHS0;
 905 //static puText      *HUDtextText;
 906 //static puSlider    *HUDalphaHS1;
 907 static char         SliderText[2][ 8 ];
 908
 909 static void alpha_adj( puObject *hs ) {
 910     float val ;
 911
 912     hs-> getValue ( &val ) ;
 913     fgAP_CLAMP ( val, 0.1, 1.0 ) ;
 914     // printf ( "maxroll_adj( %p ) %f %f\n", hs, val, MaxRollAdjust * val ) ;
 915     hud_trans_alpha = val;
 916     sprintf( SliderText[ 0 ], "%05.2f", hud_trans_alpha );
 917     HUDalphaText -> setLabel ( SliderText[ 0 ] ) ;
 918 }
 919
 920 void fgHUDalphaAdjust( puObject * ) {
 921     fgSetBool("/sim/hud/antialiased", true);
 922     FG_PUSH_PUI_DIALOG( HUDalphaDialog );
 923 }
 924
 925 static void goAwayHUDalphaAdjust (puObject *)
 926 {
 927     FG_POP_PUI_DIALOG( HUDalphaDialog );
 928 }
 929
 930 static void cancelHUDalphaAdjust (puObject *)
 931 {
 932     fgSetBool("/sim/hud/antialiased", false);
 933     FG_POP_PUI_DIALOG( HUDalphaDialog );
 934 }
 935
 936 // Done once at system initialization
 937 void fgHUDalphaInit( void ) {
 938
 939     //  printf("fgHUDalphaInit\n");
 940 #define HORIZONTAL  FALSE
 941
 942     int DialogX = 40;
 943     int DialogY = 100;
 944     int DialogWidth = 240;
 945
 946     char Label[] =  "HUD Adjuster";
 947     char *s;
 948
 949     int labelX = (DialogWidth / 2) -
 950         (puGetStringWidth( puGetDefaultLabelFont(), Label ) / 2);
 951
 952     int nSliders = 1;
 953     int slider_x = 10;
 954     int slider_y = 55;
 955     int slider_width = 220;
 956     int slider_title_x = 15;
 957     int slider_value_x = 160;
 958     float slider_delta = 0.05f;
 959
 960     puFont HUDalphaLegendFont;
 961     puFont HUDalphaLabelFont;
 962     puGetDefaultFonts ( &HUDalphaLegendFont, &HUDalphaLabelFont );
 963
 964     HUDalphaDialog = new puDialogBox ( DialogX, DialogY ); {
 965         int horiz_slider_height = puGetStringHeight (HUDalphaLabelFont) +
 966             puGetStringDescender (HUDalphaLabelFont) +
 967             PUSTR_TGAP + PUSTR_BGAP + 5;
 968
 969         /* puFrame *
 970             HUDalphaFrame = new puFrame ( 0, 0, DialogWidth,
 971                                           85 + nSliders
 972                                           * horiz_slider_height ); */
 973
 974         puText *
 975             HUDalphaDialogMessage = new puText ( labelX,
 976                                                  52 + nSliders
 977                                                  * horiz_slider_height );
 978         HUDalphaDialogMessage -> setDefaultValue ( Label );
 979         HUDalphaDialogMessage -> getDefaultValue ( &s );
 980         HUDalphaDialogMessage -> setLabel        ( s );
 981
 982         HUDalphaHS0 = new puSlider ( slider_x, slider_y,
 983                                      slider_width, HORIZONTAL ) ;
 984         HUDalphaHS0->     setDelta ( slider_delta ) ;
 985         HUDalphaHS0->     setValue ( hud_trans_alpha ) ;
 986         HUDalphaHS0->    setCBMode ( PUSLIDER_DELTA ) ;
 987         HUDalphaHS0->  setCallback ( alpha_adj ) ;
 988
 989         puText *
 990             HUDalphaTitle =      new puText ( slider_title_x, slider_y ) ;
 991         HUDalphaTitle-> setDefaultValue ( "Alpha" ) ;
 992         HUDalphaTitle-> getDefaultValue ( &s ) ;
 993         HUDalphaTitle->        setLabel ( s ) ;
 994
 995         HUDalphaText = new puText ( slider_value_x, slider_y ) ;
 996         sprintf( SliderText[ 0 ], "%05.2f", hud_trans_alpha );
 997         HUDalphaText-> setLabel ( SliderText[ 0 ] ) ;
 998
 999         puOneShot *
1000             HUDalphaOkButton =     new puOneShot ( 10, 10, 60, 45 );
1001         HUDalphaOkButton->         setLegend ( gui_msg_OK );
1002         HUDalphaOkButton-> makeReturnDefault ( TRUE );
1003         HUDalphaOkButton->       setCallback ( goAwayHUDalphaAdjust );
1004
1005         puOneShot *
1006             HUDalphaNoButton = new puOneShot ( 160, 10, 230, 45 );
1007         HUDalphaNoButton->     setLegend ( gui_msg_CANCEL );
1008         HUDalphaNoButton->   setCallback ( cancelHUDalphaAdjust );
1009     }
1010     FG_FINALIZE_PUI_DIALOG( HUDalphaDialog );
1011
1012 #undef HORIZONTAL
1013 }
1014
1015
1016 void fgHUDReshape(void) {
1017     if ( HUDtext ) {
1018         // this chunk of code is not necessarily thread safe if the
1019         // compiler optimizer reorders these statements.  Note that
1020         // "delete ptr" does not set "ptr = NULL".  We have to do that
1021         // ourselves.
1022         fntRenderer *tmp = HUDtext;
1023         HUDtext = NULL;
1024         delete tmp;
1025     }
1026
1027     HUD_TextSize = fgGetInt("/sim/startup/xsize") / 60;
1028     HUD_TextSize = 10;
1029     HUDtext = new fntRenderer();
1030     HUDtext -> setFont      ( guiFntHandle ) ;
1031     HUDtext -> setPointSize ( HUD_TextSize ) ;
1032     HUD_TextList.setFont( HUDtext );
1033 }
1034
1035
1036 static void set_hud_color(float r, float g, float b) {
1037     fgGetBool("/sim/hud/antialiased") ?
1038         glColor4f(r,g,b,hud_trans_alpha) :
1039         glColor3f(r,g,b);
1040 }
1041
1042
1043 // fgUpdateHUD
1044 //
1045 // Performs a once around the list of calls to instruments installed in
1046 // the HUD object with requests for redraw. Kinda. It will when this is
1047 // all C++.
1048 //
1049 void fgUpdateHUD( void ) {
1050
1051     static const float normal_aspect = float(640) / float(480);
1052     // note: win_ratio is Y/X
1053     float current_aspect = 1.0f/globals->get_current_view()->get_win_ratio();
1054     if( current_aspect > normal_aspect ) {
1055         float aspect_adjust = current_aspect / normal_aspect;
1056         float adjust = 320.0f*aspect_adjust - 320.0f;
1057         fgUpdateHUD( -adjust, 0.0f, 640.0f+adjust, 480.0f );
1058     } else {
1059         float aspect_adjust = normal_aspect / current_aspect;
1060         float adjust = 240.0f*aspect_adjust - 240.0f;
1061         fgUpdateHUD( 0.0f, -adjust, 640.0f, 480.0f+adjust );
1062     }
1063 }
1064
1065 void fgUpdateHUD( GLfloat x_start, GLfloat y_start,
1066                   GLfloat x_end, GLfloat y_end )
1067 {
1068   int brightness;
1069   // int day_night_sw = current_aircraft.controls->day_night_switch;
1070   int day_night_sw = global_day_night_switch;
1071   int hud_displays = HUD_deque.size();
1072   instr_item *pHUDInstr;
1073   // float line_width;
1074
1075   if( !hud_displays ) {  // Trust everyone, but ALWAYS cut the cards!
1076     return;
1077     }
1078
1079   HUD_TextList.erase();
1080   HUD_LineList.erase();
1081   // HUD_StippleLineList.erase();
1082
1083   pHUDInstr = HUD_deque[0];
1084   brightness = pHUDInstr->get_brightness();
1085   // brightness = HUD_deque.at(0)->get_brightness();
1086
1087   glMatrixMode(GL_PROJECTION);
1088   glPushMatrix();
1089
1090   glLoadIdentity();
1091   gluOrtho2D(x_start, x_end, y_start, y_end);
1092   glMatrixMode(GL_MODELVIEW);
1093   glPushMatrix();
1094   glLoadIdentity();
1095
1096   glDisable(GL_DEPTH_TEST);
1097   glDisable(GL_LIGHTING);
1098
1099   static const SGPropertyNode * antialiased_node
1100       = fgGetNode("/sim/hud/antialiased");
1101
1102   if( antialiased_node->getBoolValue() ) {
1103           glEnable(GL_LINE_SMOOTH);
1104 //        glEnable(GL_BLEND);
1105           glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
1106           glHint(GL_LINE_SMOOTH_HINT,GL_DONT_CARE);
1107           glLineWidth(1.5);
1108   } else {
1109           glLineWidth(1.0);
1110   }
1111
1112   if( day_night_sw == DAY) {
1113       switch (brightness)
1114           {
1115           case BRT_LIGHT:
1116               set_hud_color (0.1f, 0.9f, 0.1f);
1117               break;
1118
1119           case BRT_MEDIUM:
1120               set_hud_color (0.1f, 0.7f, 0.0f);
1121               break;
1122
1123           case BRT_DARK:
1124               set_hud_color (0.0f, 0.6f, 0.0f);
1125               break;
1126
1127           case BRT_BLACK:
1128               set_hud_color( 0.0f, 0.0f, 0.0f);
1129               break;
1130
1131           default:
1132               set_hud_color (0.1f, 0.9f, 0.1f);
1133           }
1134   } else {
1135       if( day_night_sw == NIGHT) {
1136           switch (brightness)
1137               {
1138               case BRT_LIGHT:
1139                   set_hud_color (0.9f, 0.1f, 0.1f);
1140                   break;
1141
1142               case BRT_MEDIUM:
1143                   set_hud_color (0.7f, 0.0f, 0.1f);
1144                   break;
1145
1146               case BRT_DARK:
1147                   set_hud_color (0.6f, 0.0f, 0.0f);
1148                   break;
1149
1150               case BRT_BLACK:
1151                   set_hud_color( 0.0f, 0.0f, 0.0f);
1152                   break;
1153
1154               default:
1155                   set_hud_color (0.6f, 0.0f, 0.0f);
1156               }
1157       } else {     // Just in case default
1158           set_hud_color (0.1f, 0.9f, 0.1f);
1159       }
1160   }
1161
1162   deque < instr_item * > :: iterator current = HUD_deque.begin();
1163   deque < instr_item * > :: iterator last = HUD_deque.end();
1164
1165   for ( ; current != last; ++current ) {
1166           pHUDInstr = *current;
1167
1168           if( pHUDInstr->enabled()) {
1169                   //  fgPrintf( SG_COCKPIT, SG_DEBUG, "HUD Code %d  Status %d\n",
1170                   //            hud->code, hud->status );
1171                   pHUDInstr->draw();
1172
1173           }
1174   }
1175
1176   char *gmt_str = get_formated_gmt_time();
1177   HUD_TextList.add( fgText(40, 10, gmt_str, 0) );
1178
1179 #ifdef FG_NETWORK_OLK
1180   if ( net_hud_display ) {
1181       net_hud_update();
1182   }
1183 #endif
1184
1185
1186   // temporary
1187   // extern bool fgAPAltitudeEnabled( void );
1188   // extern bool fgAPHeadingEnabled( void );
1189   // extern bool fgAPWayPointEnabled( void );
1190   // extern char *fgAPget_TargetDistanceStr( void );
1191   // extern char *fgAPget_TargetHeadingStr( void );
1192   // extern char *fgAPget_TargetAltitudeStr( void );
1193   // extern char *fgAPget_TargetLatLonStr( void );
1194
1195   int apY = 480 - 80;
1196   // char scratch[128];
1197   // HUD_TextList.add( fgText( "AUTOPILOT", 20, apY) );
1198   // apY -= 15;
1199   if( current_autopilot->get_HeadingEnabled() ) {
1200       HUD_TextList.add( fgText( 40, apY,
1201                                 current_autopilot->get_TargetHeadingStr()) );
1202       apY -= 15;
1203   }
1204   if( current_autopilot->get_AltitudeEnabled() ) {
1205       HUD_TextList.add( fgText( 40, apY,
1206                                 current_autopilot->get_TargetAltitudeStr()) );
1207       apY -= 15;
1208   }
1209   if( current_autopilot->get_HeadingMode() ==
1210       FGAutopilot::FG_HEADING_WAYPOINT )
1211   {
1212       char *wpstr;
1213       wpstr = current_autopilot->get_TargetWP1Str();
1214       if ( strlen( wpstr ) ) {
1215           HUD_TextList.add( fgText( 40, apY, wpstr ) );
1216           apY -= 15;
1217       }
1218       wpstr = current_autopilot->get_TargetWP2Str();
1219       if ( strlen( wpstr ) ) {
1220           HUD_TextList.add( fgText( 40, apY, wpstr ) );
1221           apY -= 15;
1222       }
1223       wpstr = current_autopilot->get_TargetWP3Str();
1224       if ( strlen( wpstr ) ) {
1225           HUD_TextList.add( fgText( 40, apY, wpstr ) );
1226           apY -= 15;
1227       }
1228   }
1229
1230   HUD_TextList.draw();
1231
1232   HUD_LineList.draw();
1233
1234   // glEnable(GL_LINE_STIPPLE);
1235   // glLineStipple( 1, 0x00FF );
1236   // HUD_StippleLineList.draw();
1237   // glDisable(GL_LINE_STIPPLE);
1238
1239   if( antialiased_node->getBoolValue() ) {
1240       // glDisable(GL_BLEND);
1241       glDisable(GL_LINE_SMOOTH);
1242       glLineWidth(1.0);
1243   }
1244
1245   glEnable(GL_DEPTH_TEST);
1246   glEnable(GL_LIGHTING);
1247   glMatrixMode(GL_PROJECTION);
1248   glPopMatrix();
1249   glMatrixMode(GL_MODELVIEW);
1250   glPopMatrix();
1251 }
1252