src/Cockpit/hud_ladr.cxx

   1 #ifdef HAVE_CONFIG_H
   2 #  include <config.h>
   3 #endif
   4
   5 #ifdef HAVE_WINDOWS_H
   6 #  include <windows.h>
   7 #endif
   8 #include <stdlib.h>
   9 #include <string.h>
  10 #include <Aircraft/aircraft.hxx>
  11 #include <Include/fg_constants.h>
  12 #include <Math/fg_random.h>
  13 #include <Math/mat3.h>
  14 #include <Math/polar3d.hxx>
  15 #include <Scenery/scenery.hxx>
  16 #include <Time/fg_timer.hxx>
  17 #include <GUI/gui.h>
  18
  19 #include "hud.hxx"
  20 //====================== Top of HudLadder Class =======================
  21 HudLadder ::   HudLadder(  int       x,
  22                int       y,
  23                UINT      width,
  24                UINT      height,
  25                FLTFNPTR  ptch_source,
  26                FLTFNPTR  roll_source,
  27                float    span_units,
  28                float    major_div,
  29                float    minor_div,
  30                UINT      screen_hole,
  31                UINT      lbl_pos,
  32                bool      working) :
  33    dual_instr_item( x, y, width, height,
  34                     ptch_source,
  35                     roll_source,
  36                     working,
  37                     HUDS_RIGHT),
  38                     width_units    ( (int)(span_units)   ),
  39                     div_units      ( (int)(major_div < 0? -major_div: major_div) ),
  40                     minor_div      ( (int)(minor_div)    ),
  41                     label_pos      ( lbl_pos      ),
  42                     scr_hole       ( screen_hole  ),
  43                     vmax           ( span_units/2 ),
  44                     vmin           ( -vmax        )
  45    {
  46        if( !width_units ) {
  47            width_units = 45;
  48        }
  49        factor = (float)get_span() / (float) width_units;
  50    }
  51
  52 HudLadder ::  ~HudLadder()
  53     {
  54     }
  55
  56     HudLadder ::
  57             HudLadder( const HudLadder & image ) :
  58             dual_instr_item( (dual_instr_item &) image),
  59             width_units    ( image.width_units   ),
  60             div_units      ( image.div_units     ),
  61             label_pos      ( image.label_pos     ),
  62             scr_hole       ( image.scr_hole      ),
  63             vmax           ( image.vmax ),
  64             vmin           ( image.vmin ),
  65             factor         ( image.factor        )
  66     {
  67     }
  68 HudLadder & HudLadder ::  operator = ( const HudLadder & rhs )
  69     {
  70         if( !(this == &rhs)) {
  71             (dual_instr_item &)(*this) = (dual_instr_item &)rhs;
  72             width_units  = rhs.width_units;
  73             div_units    = rhs.div_units;
  74             label_pos    = rhs.label_pos;
  75             scr_hole     = rhs.scr_hole;
  76             vmax         = rhs.vmax;
  77             vmin         = rhs.vmin;
  78             factor       = rhs.factor;
  79         }
  80         return *this;
  81     }
  82
  83 //
  84 //  Draws a climb ladder in the center of the HUD
  85 //
  86
  87 void HudLadder :: draw( void )
  88 {
  89     float  x_ini;
  90     float  x_end;
  91     float  y;
  92
  93     POINT  centroid    = get_centroid();
  94     RECT   box         = get_location();
  95
  96     float   half_span  = box.right / 2.0;
  97     float   roll_value = current_ch2();
  98
  99     float pitch_value = current_ch1() * RAD_TO_DEG;
 100     vmin              = pitch_value - (float)width_units/2.0;
 101     vmax              = pitch_value + (float)width_units/2.0;
 102
 103     glPushMatrix();
 104     glTranslatef( centroid.x, centroid.y, 0);
 105     glRotatef(roll_value * RAD_TO_DEG, 0.0, 0.0, 1.0);
 106
 107     // Draw the target spot.
 108 #define CENTER_DIAMOND_SIZE 6.0
 109     glBegin(GL_LINE_LOOP);
 110         glVertex2f( -CENTER_DIAMOND_SIZE, 0.0);
 111         glVertex2f(0.0, CENTER_DIAMOND_SIZE);
 112         glVertex2f( CENTER_DIAMOND_SIZE, 0.0);
 113         glVertex2f(0.0, -CENTER_DIAMOND_SIZE);
 114     glEnd();
 115 #undef CENTER_DIAMOND_SIZE
 116
 117     if( div_units ) {
 118         char     TextLadder[8] ;
 119         float    label_length ;
 120         float    label_height ;
 121         float    left ;
 122         float    right ;
 123         float    bot ;
 124         float    top ;
 125         float    text_offset = 4.0f ;
 126         float    zero_offset = 10.0f ;
 127
 128         fntFont *font      = HUDtext->getFont();
 129         float    pointsize = HUDtext->getPointSize();
 130         float    italic    = HUDtext->getSlant();
 131
 132         TextList.setFont( HUDtext );
 133         TextList.erase();
 134         LineList.erase();
 135         StippleLineList.erase();
 136
 137         int last = FloatToInt(vmax)+1;
 138         int i    = FloatToInt(vmin);
 139
 140         if( !scr_hole ) {
 141             for( ; i<last ; i++ ) {
 142
 143                 y =  (((float)(i - pitch_value) * factor) + .5f);
 144                 if( !(i % div_units ))    {        //  At integral multiple of div
 145
 146                     sprintf( TextLadder, "%d", i );
 147                     font->getBBox ( TextLadder, pointsize, italic,
 148                                     &left, &right, &bot, &top ) ;
 149                     label_length  = right - left;
 150                     label_length += text_offset;
 151                     label_height  = (top - bot)/2.0f;
 152
 153                     x_ini = -half_span;
 154                     x_end =  half_span;
 155
 156                     if( i >= 0 ) {
 157                         // Make zero point wider on left
 158                         if( i == 0 )
 159                             x_ini -= zero_offset;
 160                         // Zero or above draw solid lines
 161                         Line(x_ini, y, x_end, y);
 162                     } else {
 163                         // Below zero draw dashed lines.
 164                         StippleLine(x_ini, y, x_end, y);
 165                     }
 166
 167                     // Calculate the position of the left text and write it.
 168                     Text( x_ini-label_length, y-label_height, TextLadder );
 169                     Text( x_end+text_offset,  y-label_height, TextLadder );
 170                 }
 171             }
 172         }
 173         else // if(scr_hole )
 174         {    // Draw ladder with space in the middle of the lines
 175             float hole = (float)((scr_hole)/2.0f);
 176             for( ; i<last ; i++ )      {
 177
 178                 y = (((float)(i - pitch_value) * factor) + .5);
 179                 if( !(i % div_units ))    {        //  At integral multiple of div
 180
 181                     sprintf( TextLadder, "%d", i );
 182                     font->getBBox ( TextLadder, pointsize, italic,
 183                                     &left, &right, &bot, &top ) ;
 184                     label_length  = right - left;
 185                     label_length += text_offset;
 186                     label_height  = (top - bot)/2.0f;
 187 //                  printf("l %f r %f b %f t %f\n",left, right, bot, top );
 188
 189                     // Start by calculating the points and drawing the
 190                     // left side lines.
 191                     x_ini = -half_span;
 192                     x_end = -half_span + hole;
 193
 194                     if( i >= 0 ) {
 195                         // Make zero point wider on left
 196                         if( i == 0 )
 197                             x_ini -= zero_offset;
 198                         // Zero or above draw solid lines
 199                         Line(x_ini, y, x_end, y);
 200                     } else {
 201                         // Below zero draw dashed lines.
 202                         StippleLine(x_ini, y, x_end, y);
 203                     }
 204
 205                     // Now calculate the location of the left side label using
 206                     Text( x_ini-label_length, y-label_height, TextLadder );
 207
 208                     // Now calculate and draw the right side line location
 209                     x_ini = half_span - hole;
 210                     x_end = half_span;
 211
 212                     if( i >= 0 ) {
 213                         if( i == 0 )
 214                             x_end += zero_offset;
 215                         // Zero or above draw solid lines
 216                         Line(x_ini, y, x_end, y);
 217                     } else {
 218                         // Below zero draw dashed lines.
 219                         StippleLine(x_ini, y, x_end, y);
 220                     }
 221
 222                     // Calculate the location and draw the right side label
 223                     Text( x_end+text_offset,  y-label_height, TextLadder );
 224                 }
 225             }
 226         }
 227         TextList.draw();
 228
 229         glLineWidth(0.2);
 230
 231         LineList.draw();
 232
 233         glEnable(GL_LINE_STIPPLE);
 234         glLineStipple( 1, 0x00FF );
 235         StippleLineList.draw( );
 236         glDisable(GL_LINE_STIPPLE);
 237     }
 238     glPopMatrix();
 239 }
 240