]> git.mxchange.org Git - flightgear.git/blobdiff - src/Cockpit/hud_ladr.cxx
Tiled panel background support from Jim Wilson.
[flightgear.git] / src / Cockpit / hud_ladr.cxx
index 08cf1980e7e7c8748a9947d5b18ae7d8b4240a13..2ce6b2423b922ff8e36aea7312f79407ed8f9dd5 100644 (file)
 
 #include "hud.hxx"
+#include "panel.hxx"
 
 #define DO_PANEL_HACK
 
 //====================== Top of HudLadder Class =======================
-HudLadder ::   HudLadder(  int       x,
-               int       y,
-               UINT      width,
-               UINT      height,
-               UINT      mini,
-               FLTFNPTR  ptch_source,
-               FLTFNPTR  roll_source,
-               float    span_units,
-               float    major_div,
-               float    minor_div,
-               UINT      screen_hole,
-               UINT      lbl_pos,
-               bool      working) :
-   dual_instr_item( x, y, width, height,
-                    ptch_source,
-                    roll_source,
-                    working,
-                    HUDS_RIGHT),
-                    width_units    ( (int)(span_units)   ),
-                    div_units      ( (int)(major_div < 0? -major_div: major_div) ),
-                    minor_div      ( (int)(minor_div)    ),
-                    label_pos      ( lbl_pos      ),
-                    scr_hole       ( screen_hole  ),
-                    vmax           ( span_units/2 ),
-                    vmin           ( -vmax        )
-   {
-       if( !width_units ) {
-           width_units = 45;
-       }
-       factor = (float)get_span() / (float) width_units;
-       minimal = mini;
-   }
+HudLadder ::   HudLadder(  string name,
+                          int       x,
+                          int       y,
+                          UINT      width,
+                          UINT      height,
+                          float         factr,
+                          FLTFNPTR  ptch_source,
+                          FLTFNPTR  roll_source,
+                          float     span_units,
+                          float     major_div,
+                          float     minor_div,
+                          UINT      screen_hole,
+                          UINT      lbl_pos,
+                          bool      frl_spot,
+                          bool          target,
+                          bool          vel_vec,
+                          bool          drift,
+                          bool          alpha,
+                          bool      energy,
+                          bool      climb,
+                          bool      glide,
+                          float     glide_slope_val,
+                          bool      worm_energy,
+                          bool      waypoint,
+                          bool      working,
+                          int           zenithsymbol, //suma
+                          int       nadirsymbol, //suma
+                          int           hat_marker): //suma
+
+    dual_instr_item( x, y, width, height,
+                    ptch_source,
+                    roll_source,
+                    working,
+                    HUDS_RIGHT),
+    width_units                        ( (int)(span_units)   ),
+    div_units                  ( (int)(major_div < 0? -major_div: major_div) ),
+    minor_div                  ( (int)(minor_div)    ),
+    label_pos                  ( lbl_pos      ),
+    scr_hole                   ( screen_hole  ),
+    vmax                               ( span_units/2 ),
+    vmin                               ( -vmax        ),
+    factor                             ( factr           ),
+    hudladder_type             ( name            ),
+    frl                                        ( frl_spot              ),
+    target_spot                        ( target                ),
+    velocity_vector            ( vel_vec               ),
+    drift_marker               ( drift                 ),
+    alpha_bracket              ( alpha                 ),
+    energy_marker              ( energy                ),
+    climb_dive_marker  ( climb         ),
+    glide_slope_marker ( glide                 ),
+    glide_slope                        ( glide_slope_val),
+    energy_worm                        ( worm_energy),
+    waypoint_marker            ( waypoint)
+
+
+{
+               
+    zenith= zenithsymbol; //suma
+       nadir=nadirsymbol; //suma
+       hat= hat_marker; //suma
+       if( !width_units ) 
+       {
+          width_units = 45;
+    }
+}
    
 HudLadder ::  ~HudLadder()
-    {
-    }
+{
+}
            
-    HudLadder ::
-            HudLadder( const HudLadder & image ) :
-            dual_instr_item( (dual_instr_item &) image),
-            width_units    ( image.width_units   ),
-            div_units      ( image.div_units     ),
-            label_pos      ( image.label_pos     ),
-            scr_hole       ( image.scr_hole      ),
-            vmax           ( image.vmax ),
-            vmin           ( image.vmin ),
-            factor         ( image.factor        )
-    {
-    }
+HudLadder ::
+HudLadder( const HudLadder & image ) :
+    dual_instr_item            ( (dual_instr_item &) image),
+    width_units                        ( image.width_units   ),
+    div_units                  ( image.div_units     ),
+    label_pos                  ( image.label_pos     ),
+    scr_hole                   ( image.scr_hole      ),
+    vmax                               ( image.vmax ),
+    vmin                               ( image.vmin ),
+    factor                             ( image.factor        ),
+    hudladder_type             ( image.hudladder_type),
+    frl                                        ( image.frl),
+    target_spot                        ( image.target_spot),
+    velocity_vector            ( image.velocity_vector),
+    drift_marker               ( image.drift_marker),
+    alpha_bracket              ( image.alpha_bracket),
+    energy_marker              ( image.energy_marker),
+    climb_dive_marker  ( image.climb_dive_marker),
+    glide_slope_marker ( image.glide_slope_marker),
+    glide_slope                        ( image.glide_slope),
+    energy_worm                        ( image.energy_worm),
+    waypoint_marker            ( image.waypoint_marker)
+{
+}
 HudLadder & HudLadder ::  operator = ( const HudLadder & rhs )
-    {
-        if( !(this == &rhs)) {
-            (dual_instr_item &)(*this) = (dual_instr_item &)rhs;
-            width_units  = rhs.width_units;
-            div_units    = rhs.div_units;
-            label_pos    = rhs.label_pos;
-            scr_hole     = rhs.scr_hole;
-            vmax         = rhs.vmax;
-            vmin         = rhs.vmin;
-            factor       = rhs.factor;
-        }
-        return *this;
+{
+    if( !(this == &rhs)) {
+       (dual_instr_item &)(*this) = (dual_instr_item &)rhs;
+       width_units                     = rhs.width_units;
+       div_units                       = rhs.div_units;
+       label_pos                       = rhs.label_pos;
+       scr_hole                        = rhs.scr_hole;
+       vmax                            = rhs.vmax;
+       vmin                            = rhs.vmin;
+       factor                          = rhs.factor;
+       hudladder_type          = rhs.hudladder_type;
+       frl                                     = rhs.frl;
+       velocity_vector         = rhs.velocity_vector;
+       drift_marker            = rhs.drift_marker;
+       alpha_bracket           = rhs.alpha_bracket;
+       energy_marker           = rhs.energy_marker;
+       climb_dive_marker       = rhs.climb_dive_marker;
+       target_spot                     = rhs.target_spot;
+       glide_slope_marker      = rhs.glide_slope_marker;
+       glide_slope                     = rhs.glide_slope;
+       energy_worm                     = rhs.energy_worm;
+       waypoint_marker         = rhs.waypoint_marker;
     }
+    return *this;
+}
                            
 //
 //  Draws a climb ladder in the center of the HUD
@@ -74,160 +134,754 @@ HudLadder & HudLadder ::  operator = ( const HudLadder & rhs )
 
 void HudLadder :: draw( void )
 {
+
+    float  x_ini,x_ini2;
+    float  x_end,x_end2;
+    float  y = 0;
+    int count;
+    float cosine, sine, xvvr, yvvr, Vxx = 0.0, Vyy = 0.0, Vzz = 0.0,
+        up_vel, ground_vel, actslope = 0.0;
+    float Axx = 0.0, Ayy = 0.0, Azz = 0.0, total_vel = 0.0, pot_slope, t1,
+        t2 = 0.0, psi = 0.0, alpha,pla;
+    float vel_x = 0.0, vel_y = 0.0, drift;
+    // char     Textaux[8] ;
+    bool  pitch_ladder = false;
+    bool  climb_dive_ladder = false;
+    bool  clip_plane = false;
+
+    GLdouble eqn_top[4] = {0.0,-1.0,0.0,0.0};
+    GLdouble eqn_left[4] = {-1.0,0.0,0.0,100.0};
+    GLdouble eqn_right[4] = {1.0,0.0,0.0,100.0};
+
     POINT  centroid    = get_centroid();
-       
+    RECT   box         = get_location();
+
+    float   half_span  = box.right / 2.0;
     float   roll_value = current_ch2();
+    alpha = get_aoa();
+    pla = get_throttleval();
+
+    int lgear,wown,wowm,ilcanclaw,ihook;
+    ilcanclaw = get_iaux2();
+    lgear = get_iaux3();
+    wown = get_iaux4();
+    wowm = get_iaux5();
+    ihook = get_iaux6();
     
+    float pitch_value = current_ch1() * SGD_RADIANS_TO_DEGREES;
+       
+    if(hudladder_type=="Climb/Dive Ladder") {
+       pitch_ladder = false;
+       climb_dive_ladder = true;
+       clip_plane = true;
+    }
+    else
+       // hudladder_type=="Pitch Ladder" 
+       {
+           pitch_ladder = true;
+           climb_dive_ladder = false;
+           clip_plane = false;
+       }
+       
+    //**************************************************************
     glPushMatrix();
+    // define (0,0) as center of screen
     glTranslatef( centroid.x, centroid.y, 0);
-       // Alex's panel patch
-//     glScalef( current_options.get_fov()/55.0, 1.0, 1.0 );
-    glRotatef(roll_value * RAD_TO_DEG, 0.0, 0.0, 1.0);
 
+    // OBJECT STATIC RETICLE
+    // TYPE FRL
+    // ATTRIB - ALWAYS
+    // Draw the FRL spot and line
+    if(frl)    {
+#define FRL_DIAMOND_SIZE 2.0
+       glBegin(GL_LINE_LOOP);
+       glVertex2f( -FRL_DIAMOND_SIZE, 0.0);
+       glVertex2f(0.0, FRL_DIAMOND_SIZE);
+       glVertex2f( FRL_DIAMOND_SIZE, 0.0);
+       glVertex2f(0.0, -FRL_DIAMOND_SIZE);
+       glEnd();
+       glBegin(GL_LINE_STRIP);
+       glVertex2f(0, FRL_DIAMOND_SIZE);
+       glVertex2f(0, 8.0 );
+       glEnd();
+#undef FRL_DIAMOND_SIZE
+    }
+    // TYPE WATERLINE_MARK (W shaped _    _ )
+    //                                               \/\/
+
+    //****************************************************************    
+    // TYPE TARGET_SPOT
     // Draw the target spot.
-#define CENTER_DIAMOND_SIZE 6.0f
-       
-    glBegin(GL_LINE_LOOP);
-        glVertex2f( CENTER_DIAMOND_SIZE, 0.0);
-        glVertex2f( 0.0, CENTER_DIAMOND_SIZE);
-        glVertex2f( -CENTER_DIAMOND_SIZE, 0.0);
-        glVertex2f( 0.0, -CENTER_DIAMOND_SIZE);
-    glEnd();
-
-    if( minimal || ! div_units ) {
-        glPopMatrix();      
-        return;
+    if (target_spot)   {
+#define CENTER_DIAMOND_SIZE 6.0
+       glBegin(GL_LINE_LOOP);
+       glVertex2f( -CENTER_DIAMOND_SIZE, 0.0);
+       glVertex2f(0.0, CENTER_DIAMOND_SIZE);
+       glVertex2f( CENTER_DIAMOND_SIZE, 0.0);
+       glVertex2f(0.0, -CENTER_DIAMOND_SIZE);
+       glEnd();
+#undef CENTER_DIAMOND_SIZE
     }
 
-       float  x_ini;
-       float  x_end;
-       float  y;
+    //****************************************************************    
+    //velocity vector reticle - computations
+    if(velocity_vector)        {
+       Vxx = get_Vx();
+       Vyy = get_Vy();
+       Vzz = get_Vz();
+       Axx = get_Ax();
+       Ayy = get_Ay();
+       Azz = get_Az();
+       psi = get_heading();
 
-       float pitch_value = current_ch1() * RAD_TO_DEG;
-       vmin              = pitch_value - (float)width_units * 0.5f;
-       vmax              = pitch_value + (float)width_units * 0.5f;
+       if (psi > 180.0) psi = psi - 360;
 
-       RECT   box         = get_location();
+       total_vel = sqrt(Vxx*Vxx + Vyy*Vyy + Vzz*Vzz);
+       ground_vel = sqrt(Vxx*Vxx + Vyy*Vyy);
+       up_vel = Vzz;
 
-       float   half_span  = box.right * 0.5f ;
+       if (ground_vel < 2.0) {
+           if (fabs(up_vel) < 2.0) {
+               actslope = 0.0;
+           } else {
+               actslope = (up_vel/fabs(up_vel))*90.0;
+           }
+       } else {
+           actslope = atan(up_vel/ground_vel)*SGD_RADIANS_TO_DEGREES;
+       }
 
-       char     TextLadder[8] ;
-       float    label_length ;
-       float    label_height ;
-       float    left ;
-       float    right ;
-       float    bot ;
-       float    top ;
-       float    text_offset = 4.0f ;
-       float    zero_offset = 10.0f ;
-       
+       xvvr = (((atan2(Vyy,Vxx)*SGD_RADIANS_TO_DEGREES)-psi)*
+               (factor/globals->get_current_view()->get_aspect_ratio()));
+       drift = ((atan2(Vyy,Vxx)*SGD_RADIANS_TO_DEGREES)-psi);
+       yvvr = ((actslope - pitch_value)*factor);
+       vel_y = ((actslope -pitch_value) * cos(roll_value) + drift*sin(roll_value))*factor;
+       vel_x = (-(actslope -pitch_value)*sin(roll_value) + drift*cos(roll_value))*
+               (factor/globals->get_current_view()->get_aspect_ratio());
+       //  printf("%f %f %f %f\n",vel_x,vel_y,drift,psi);
+       //****************************************************************    
+       // OBJECT MOVING RETICLE
+       // TYPE - DRIFT MARKER
+       // ATTRIB - ALWAYS
+       // drift marker
+       if(drift_marker)        {
+           glBegin(GL_LINE_STRIP);
+           glVertex2f((xvvr*25/120)-6, -4);
+           glVertex2f(xvvr*25/120, 8);
+           glVertex2f((xvvr*25/120)+6, -4);
+           glEnd();
+       }
+
+       //****************************************************************    
+       // Clipping coordinates for ladder to be input from xml file
+       // Clip hud ladder
+       if (clip_plane) {
+           glClipPlane(GL_CLIP_PLANE0,eqn_top);
+           glEnable(GL_CLIP_PLANE0);
+           glClipPlane(GL_CLIP_PLANE1,eqn_left);
+           glEnable(GL_CLIP_PLANE1);
+           glClipPlane(GL_CLIP_PLANE2,eqn_right);
+           glEnable(GL_CLIP_PLANE2);
+           //      glScissor(-100,-240,200,240);
+           //      glEnable(GL_SCISSOR_TEST);
+       }
+       //****************************************************************    
+       // OBJECT MOVING RETICLE
+       // TYPE VELOCITY VECTOR
+       // ATTRIB - ALWAYS
+       //  velocity vector
+       glBegin(GL_LINE_LOOP);  // Use polygon to approximate a circle 
+        for(count=0; count<50; count++) {             
+           cosine = 6 * cos(count * 2 * SGD_PI/50.0); 
+            sine =   6 * sin(count * 2 * SGD_PI/50.0); 
+            glVertex2f(cosine+vel_x, sine+vel_y);
+       }     
+       glEnd(); 
+       //velocity vector reticle orientation lines
+       glBegin(GL_LINE_STRIP);
+       glVertex2f(vel_x-12, vel_y);
+       glVertex2f(vel_x-6, vel_y);
+       glEnd();
+       glBegin(GL_LINE_STRIP);
+       glVertex2f(vel_x+12, vel_y);
+       glVertex2f(vel_x+6, vel_y);
+       glEnd();
+       glBegin(GL_LINE_STRIP);
+       glVertex2f(vel_x, vel_y+12);
+       glVertex2f(vel_x, vel_y+6);
+       glEnd();
+
+       // OBJECT MOVING RETICLE
+       // TYPE LINE
+       // ATTRIB - ON CONDITION
+       if (lgear == 1) {
+           // undercarriage status
+           glBegin(GL_LINE_STRIP);
+           glVertex2f(vel_x+8, vel_y);
+           glVertex2f(vel_x+8, vel_y-4);
+           glEnd();
+           // OBJECT MOVING RETICLE
+           // TYPE LINE
+           // ATTRIB - ON CONDITION
+           glBegin(GL_LINE_STRIP);
+           glVertex2f(vel_x-8, vel_y);
+           glVertex2f(vel_x-8, vel_y-4);
+           glEnd();
+           // OBJECT MOVING RETICLE
+           // TYPE LINE
+           // ATTRIB - ON CONDITION
+           glBegin(GL_LINE_STRIP);
+           glVertex2f(vel_x, vel_y-6);
+           glVertex2f(vel_x, vel_y-10);
+           glEnd();
+       }
+
+       // OBJECT MOVING RETICLE
+       // TYPE V
+       // ATTRIB - ON CONDITION
+       if (ihook == 1) {
+           // arrestor hook status
+           glBegin(GL_LINE_STRIP);
+           glVertex2f(vel_x-4, vel_y-8);
+           glVertex2f(vel_x, vel_y-10);
+           glVertex2f(vel_x+4, vel_y-8);
+           glEnd();
+       }
+    }//if velocity_vector
+
+    //***************************************************************
+    // OBJECT MOVING RETICLE
+    // TYPE - SQUARE_BRACKET
+    // ATTRIB - ON CONDITION
+    // alpha bracket
+    if (alpha_bracket) {
+       if (ihook == 1) {
+           glBegin(GL_LINE_STRIP);
+           glVertex2f(vel_x-20 , vel_y-(16-alpha)*factor);
+           glVertex2f(vel_x-17, vel_y-(16-alpha)*factor);
+           glVertex2f(vel_x-17, vel_y-(14-alpha)*factor);
+           glVertex2f(vel_x-20, vel_y-(14-alpha)*factor);
+           glEnd();
+           glBegin(GL_LINE_STRIP);
+           glVertex2f(vel_x+20 , vel_y-(16-alpha)*factor);
+           glVertex2f(vel_x+17, vel_y-(16-alpha)*factor);
+           glVertex2f(vel_x+17, vel_y-(14-alpha)*factor);
+           glVertex2f(vel_x+20, vel_y-(14-alpha)*factor);
+           glEnd();
+       }
+    }
+    //printf("xvr=%f,yvr=%f,Vx=%f,Vy=%f,Vz=%f\n",xvvr,yvvr,Vx,Vy,Vz);
+    //printf("Ax=%f,Ay=%f,Az=%f\n",Ax,Ay,Az);
+    //**************************************************************** 
+    // OBJECT MOVING RETICLE
+    // TYPE ENERGY_MARKERS
+    // ATTRIB - ALWAYS
+    //energy markers - compute potential slope
+    if(energy_marker)  {
+       if (total_vel < 5.0) {
+           t1 = 0;
+           t2 = 0;
+       } else {
+           t1 = up_vel/total_vel;
+           t2 = asin((Vxx*Axx + Vyy*Ayy + Vzz*Azz)/(9.81*total_vel));
+       }
+       pot_slope = ((t2/3)*SGD_RADIANS_TO_DEGREES)*factor + vel_y;
+       //    if (pot_slope < (vel_y - 45)) pot_slope = vel_y-45;
+       //    if (pot_slope > (vel_y + 45)) pot_slope = vel_y+45;
+
+       //energy markers
+       glBegin(GL_LINE_STRIP);
+       glVertex2f(vel_x-20, pot_slope-5);
+       glVertex2f(vel_x-15, pot_slope);
+       glVertex2f(vel_x-20, pot_slope+5);
+       glEnd();
+       glBegin(GL_LINE_STRIP);
+       glVertex2f(vel_x+20, pot_slope-5);
+       glVertex2f(vel_x+15, pot_slope);
+       glVertex2f(vel_x+20, pot_slope+5);
+       glEnd();
+       if (pla > (105.0/131.0)) {
+           glBegin(GL_LINE_STRIP);
+           glVertex2f(vel_x-24, pot_slope-5);
+           glVertex2f(vel_x-19, pot_slope);
+           glVertex2f(vel_x-24, pot_slope+5);
+           glEnd();
+           glBegin(GL_LINE_STRIP);
+           glVertex2f(vel_x+24, pot_slope-5);
+           glVertex2f(vel_x+19, pot_slope);
+           glVertex2f(vel_x+24, pot_slope+5);
+           glEnd();
+       }
+    }
+    //********************************************************** 
+    // ramp reticle
+    // OBJECT STATIC RETICLE
+    // TYPE LINE
+    // ATTRIB - ON CONDITION
+    if (energy_worm)   {
+       if (ilcanclaw == 1) {
+           glBegin(GL_LINE_STRIP);
+           glVertex2f(-15, -134);
+           glVertex2f(15, -134);
+           glEnd();
+           // OBJECT MOVING RETICLE
+           // TYPE BOX
+           // ATTRIB - ON CONDITION
+           glBegin(GL_LINE_STRIP);
+           glVertex2f(-6, -134);
+           glVertex2f(-6, t2*SGD_RADIANS_TO_DEGREES*4.0 - 134);
+           glVertex2f(+6, t2*SGD_RADIANS_TO_DEGREES*4.0 - 134);
+           glVertex2f(6, -134);
+           glEnd();
+           // OBJECT MOVING RETICLE
+           // TYPE DIAMOND
+           // ATTRIB - ON CONDITION
+           glBegin(GL_LINE_LOOP);
+           glVertex2f(-6, actslope*4.0 - 134);
+           glVertex2f(0, actslope*4.0 -134 +3);
+           glVertex2f(6, actslope*4.0 - 134);
+           glVertex2f(0, actslope*4.0 -134 -3);
+           glEnd();
+       }
+    }
+    //*************************************************************
+    // OBJECT MOVING RETICLE
+    // TYPE DIAMOND
+    // ATTRIB - ALWAYS
+    // Draw the locked velocity vector.
+    if(climb_dive_marker)      {
+       glBegin(GL_LINE_LOOP);
+        glVertex2f( -3.0, 0.0+vel_y);
+        glVertex2f(0.0, 6.0+vel_y);
+        glVertex2f( 3.0, 0.0+vel_y);
+        glVertex2f(0.0, -6.0+vel_y);
+       glEnd();
+    }
+
+    //****************************************************************    
+
+    if(climb_dive_ladder)
+       {                     // CONFORMAL_HUD
+
+       vmin              = pitch_value - (float)width_units;
+       vmax              = pitch_value + (float)width_units; 
+
+       glTranslatef( vel_x, vel_y, 0);
+
+    }
+    else 
+       // pitch_ladder - Default Hud
+       {
+
+           vmin              = pitch_value - (float)width_units * 0.5f;
+           vmax              = pitch_value + (float)width_units * 0.5f;
+
+       }
+
+    glRotatef(roll_value * SGD_RADIANS_TO_DEGREES, 0.0, 0.0, 1.0);
+    // FRL marker not rotated - this line shifted below
+
+    if( div_units ) 
+       {
+        char     TextLadder[8] ;
+        float    label_length ;
+        float    label_height ;
+        float    left ;
+        float    right ;
+        float    bot ;
+        float    top ;
+        float    text_offset = 4.0f ;
+       float    zero_offset = 0.0;
+               
+       if ( climb_dive_ladder ) {
+           zero_offset = 50.0f ; // horizon line is wider by this much (hard coded ??)
+       } else {
+               zero_offset = 10.0f ;
+    }
+               
        fntFont *font      = HUDtext->getFont();
        float    pointsize = HUDtext->getPointSize();
        float    italic    = HUDtext->getSlant();
-       
-       TextList.setFont( HUDtext );
-       TextList.erase();
-       LineList.erase();
-       StippleLineList.erase();
-       
-       int last = FloatToInt(vmax)+1;
-       int i    = FloatToInt(vmin);
-       
-       if( !scr_hole ) {
-               x_end =  half_span;
-               for( ; i<last ; i++ ) {
+
+    TextList.setFont( HUDtext );
+    TextList.erase();
+    LineList.erase();
+    StippleLineList.erase();
+
+    int last = FloatToInt(vmax)+1;
+    int i    = FloatToInt(vmin);
+
+        if( !scr_hole ) {
+           x_end =  half_span;
+            for( ; i<last ; i++ ) 
+                       {
                 
-                       y =  (((float)(i - pitch_value) * factor) + .5f);
-                       if( !(i % div_units ))    {        //  At integral multiple of div
+                y =  (((float)(i - pitch_value) * factor) + .5f);
+                if( !(i % div_units ))            //  At integral multiple of div
+                               {
                 
-                               sprintf( TextLadder, "%d", i );
-                               font->getBBox ( TextLadder, pointsize, italic,
-                                                               &left, &right, &bot, &top ) ;
-                               
-                               label_length  = right - left;
-                               label_length += text_offset;
-                               label_height  = (top - bot) * 0.5f;
+                    sprintf( TextLadder, "%d", i );
+                    font->getBBox ( TextLadder, pointsize, italic,
+                                    &left, &right, &bot, &top ) ;
+                    label_length  = right - left;
+                    label_length += text_offset;
+                    label_height  = (top - bot)/2.0f;
                 
-                               x_ini = -half_span;
-
-                               if( i >= 0 ) {
-                                       // Make zero point wider on left
-                                       if( i == 0 )
-                                               x_ini -= zero_offset;
-                                       // Zero or above draw solid lines
-                                       Line(x_ini, y, x_end, y);
-                               } else {
-                                       // Below zero draw dashed lines.
-                                       StippleLine(x_ini, y, x_end, y);
-                               }
+                    x_ini = -half_span;
                     
-                               // Calculate the position of the left text and write it.
-                               Text( x_ini-label_length, y-label_height, TextLadder );
-                               Text( x_end+text_offset,  y-label_height, TextLadder );
-                       }
-               }
-       } else  { // scr_hole != 0
-               // Draw ladder with space in the middle of the lines
-               float  x_ini2;
-               float  x_end2;
-               float hole = (float)((scr_hole)*0.5f);
-               
-               x_end  = -half_span + hole;
-               x_ini2 =  half_span - hole;
-               
-               for( ; i<last ; i++ )      {
-                
+                    if( i >= 0 ) 
+                                       {
+                        // Make zero point wider on left
+                        if( i == 0 )
+                            x_ini -= zero_offset;
+                            
+                                               // Zero or above draw solid lines
+                                               Line(x_ini, y, x_end, y);
+                                               
+                                               if(i == 90)
+                                               if(zenith == 1)
+                                               {
+                                                 drawZenith(x_ini, x_end,y);
+                                               }
+                    } else {
+                        // Below zero draw dashed lines.
+                        StippleLine(x_ini, y, x_end, y);
+
+                                               
+                                               if(i == -90)
+                                               if(nadir ==1)
+                                               { 
+                                                       drawNadir(x_ini, x_end,y);
+                                               }
+                    }
+                    
+                    // Calculate the position of the left text and write it.
+                    Text( x_ini-label_length, y-label_height, TextLadder );
+                    Text( x_end+text_offset,  y-label_height, TextLadder );
+                }
+            }
+        }
+        else // if(scr_hole )
+           {    // Draw ladder with space in the middle of the lines
+               float hole = (float)((scr_hole)/2.0f);
+
+               x_end = -half_span + hole;
+               x_ini2= half_span  - hole;
+               for( ; i<last ; i++ )      
+               {
+
+                   if(hudladder_type=="Pitch Ladder")
                        y = (((float)(i - pitch_value) * factor) + .5);
-                       if( !(i % div_units ))    {        //  At integral multiple of div
-                
-                               sprintf( TextLadder, "%d", i );
-                               font->getBBox ( TextLadder, pointsize, italic,
-                                                               &left, &right, &bot, &top ) ;
-                               label_length  = right - left;
-                               label_length += text_offset;
-                               label_height  = (top - bot) * 0.5f;
+                   else
+                       if(hudladder_type=="Climb/Dive Ladder")
+                           y = (((float)(i - actslope) * factor) + .5);
+
+                   if( !(i % div_units ))    {        //  At integral multiple of div
+
+                       sprintf( TextLadder, "%d", i );
+                       font->getBBox ( TextLadder, pointsize, italic,
+                                       &left, &right, &bot, &top ) ;
+                       label_length  = right - left;
+                       label_length += text_offset;
+                       label_height  = (top - bot)/2.0f;
+                       //                  printf("l %f r %f b %f t %f\n",left, right, bot, top );
                 
-                               // Start by calculating the points and drawing the
-                               // left side lines.
-                               x_ini  = -half_span;
-                               x_end2 =  half_span;
+                       // Start by calculating the points and drawing the
+                       // left side lines.
+                       x_ini = -half_span;
+                       x_end2= half_span;
                     
-                               if( i >= 0 ) { 
-                                       // Make zero point wider on left
-                                       if( i == 0 ) {
-                                               x_ini -= zero_offset;
-                                               x_end2 += zero_offset;
-                                       }
-                                       // Zero or above draw solid lines
-                                       Line(x_ini, y, x_end, y);
-                                       Line(x_ini2, y, x_end2, y);
-                               } else {
-                                       // Below zero draw dashed lines.
-                                       StippleLine(x_ini,  y, x_end,  y);
-                                       StippleLine(x_ini2, y, x_end2, y);
+                       if( i >= 0 ) 
+                       { 
+                           // Make zero point wider on left
+                           if( i == 0 ) 
+                               {
+                                   x_ini -= zero_offset;
+                                       x_end2 +=zero_offset;
+                           } 
+                           //draw climb bar vertical lines
+                               if(climb_dive_ladder)
+                               {
+                                  // Zero or above draw solid lines
+                                  Line(x_end, y-5.0, x_end, y);
+                                  Line(x_ini2, y-5.0, x_ini2, y);
+                           }
+                               // draw pitch / climb bar
+                           Line(x_ini, y, x_end, y);
+                           Line(x_ini2, y, x_end2, y);
+
+                               if(i == 90)
+                               if(zenith == 1)
+                               {  
+                                 drawZenith(x_ini2, x_end,y);
                                }
-                               // Calculate the location of the left side label using
-                               Text( x_ini-label_length, y-label_height, TextLadder );
-                               // Calculate the location and draw the right side label
-                               Text( x_end2+text_offset, y-label_height, TextLadder );
                        }
+                       else  // i < 0
+                       {
+                           // draw dive bar vertical lines
+                           if(climb_dive_ladder) 
+                               {
+                                       Line(x_end, y+5.0, x_end, y);
+                                       Line(x_ini2, y+5.0, x_ini2, y);
+                           }
+                           // draw pitch / dive bars
+                               StippleLine(x_ini, y, x_end, y);
+                           StippleLine(x_ini2, y, x_end2, y);
+               
+                           if(i == -90)
+                           if(nadir == 1)
+                               {
+                                   drawNadir(x_ini2, x_end,y);
+                               }
+                       }
+                    
+                       // Now calculate the location of the left side label using
+                       Text( x_ini-label_length, y-label_height, TextLadder );
+                       Text (x_end2+text_offset, y-label_height, TextLadder );
+
+                   }
                }
+
+               // OBJECT LADDER MARK
+               // TYPE LINE
+               // ATTRIB - ON CONDITION
+               // draw appraoch glide slope marker
+               if (glide_slope_marker) {
+                   if (ihook) {
+                       Line(-half_span+15, (glide_slope-actslope)*factor, -half_span + hole, (glide_slope-actslope)*factor);
+                       Line(half_span-15, (glide_slope-actslope)*factor, half_span - hole, (glide_slope-actslope)*factor);
+                   }
+               }// if glide_slope_marker
+           }
+        TextList.draw();
+
+        glLineWidth(0.2);
+        
+        LineList.draw();
+        
+        glEnable(GL_LINE_STIPPLE);
+        glLineStipple( 1, 0x00FF );
+        StippleLineList.draw( );
+        glDisable(GL_LINE_STIPPLE);
+    }
+    glDisable(GL_CLIP_PLANE0);
+    glDisable(GL_CLIP_PLANE1);
+    glDisable(GL_CLIP_PLANE2);
+    //      glDisable(GL_SCISSOR_TEST);
+    glPopMatrix();
+    //*************************************************************
+    //*************************************************************
+    if(waypoint_marker) {
+       //waypoint marker computation
+       float fromwp_lat,towp_lat,fromwp_lon,towp_lon,dist,delx,dely,hyp,theta,brg;
+
+       fromwp_lon = get_longitude()*SGD_DEGREES_TO_RADIANS;
+       fromwp_lat = get_latitude()*SGD_DEGREES_TO_RADIANS;
+       towp_lon = get_aux2()*SGD_DEGREES_TO_RADIANS;
+       towp_lat = get_aux1()*SGD_DEGREES_TO_RADIANS;
+
+       dist = acos(sin(fromwp_lat)*sin(towp_lat)+cos(fromwp_lat)*cos(towp_lat)*cos(fabs(fromwp_lon-towp_lon)));
+       delx= towp_lat - fromwp_lat;
+       dely = towp_lon - fromwp_lon;
+       hyp = sqrt(pow(delx,2)+pow(dely,2));
+       if (hyp != 0) {
+           theta = asin(dely/hyp);
+       } else {
+           theta = 0.0;
        }
-       TextList.draw();
-       
-       LineList.draw();
-
-       glEnable(GL_LINE_STIPPLE);
-#ifdef DO_PANEL_HACK
-       glLineStipple( 1, current_options.get_panel_status() ? 0x0F0F : 0x00FF );
-#else
-       glLineStipple( 1, 0x00FF );
-#endif
+       brg = theta*SGD_RADIANS_TO_DEGREES;
+       if (brg > 360.0) brg = 0.0;
+       if (delx < 0) brg = 180 - brg;
+
+       //        {Brg  = asin(cos(towp_lat)*sin(fabs(fromwp_lon-towp_lon))/ sin(dist));
+       //        Brg = Brg * SGD_RADIANS_TO_DEGREES; }
+       dist = dist*SGD_RADIANS_TO_DEGREES * 60.0*1852.0; //rad->deg->nm->m
+       // end waypoint marker computation
+       //*********************************************************
+       // OBJECT MOVING RETICLE
+       // TYPE ARROW
+       // waypoint marker
+
+         if (fabs(brg-psi) > 10.0) 
+         {
+           glPushMatrix();
+           glTranslatef( centroid.x, centroid.y, 0);
+           glTranslatef( vel_x, vel_y, 0);
+           glRotatef(brg - psi,0.0,0.0,-1.0);
+           glBegin(GL_LINE_LOOP);
+           glVertex2f(-2.5,20.0);
+           glVertex2f(-2.5,30.0);
+           glVertex2f(-5.0,30.0);
+           glVertex2f(0.0,35.0);
+           glVertex2f(5.0,30.0);
+           glVertex2f(2.5,30.0);
+           glVertex2f(2.5,20.0);
+           glEnd();
+           glPopMatrix();
+         }
+
+         // waypoint marker on heading scale
+         if (fabs(brg-psi) < 12.0) 
+         {
+         if(hat ==0)
+         {
+           glBegin(GL_LINE_LOOP);
+           glVertex2f(((brg-psi)*60/25)+320,240.0);
+           glVertex2f(((brg-psi)*60/25)+326,240.0-4);
+           glVertex2f(((brg-psi)*60/25)+323,240.0-4);
+           glVertex2f(((brg-psi)*60/25)+323,240.0-8);
+           glVertex2f(((brg-psi)*60/25)+317,240.0-8);
+           glVertex2f(((brg-psi)*60/25)+317,240.0-4);
+           glVertex2f(((brg-psi)*60/25)+314,240.0-4);
+           glEnd();
+         } else {//if hat=0
+
+                 float x= (brg-psi)*60/25 + 320,  y=240.0, r=5.0;
+                 float x1,y1;
+                                                               
+                 glEnable(GL_POINT_SMOOTH);
+                                                                                 
+         glBegin(GL_POINTS);
+                       
+                 for(int count=0; count<=200; count++)
+                 {
+                       float temp = count * 3.142 * 3 / (200.0*2.0);
+                       float temp1 = temp-(45.0*SGD_DEGREES_TO_RADIANS);
+                   x1 = x + r * cos(temp1); 
+                   y1 = y + r * sin(temp1);
+                                        
+                       glVertex2f(x1, y1);
+                 }
+                                       
+                 glEnd();
+                 glDisable(GL_POINT_SMOOTH); 
+         } //hat=0
+
+         } //brg<12
+    } // if waypoint_marker
+}//draw
+
+/******************************************************************/
+
+//begin suma
+       //  draws the zenith symbol  for highest possible climb angle (i,e 90 degree climb angle)
+
+void HudLadder :: 
+drawZenith(float xfirst,float xlast,float yvalue )
+{
+
+            float xcentre = (xfirst + xlast)/2.0;
+                float ycentre = yvalue;
+
+         Line(xcentre-9.0, ycentre, xcentre-3.0, ycentre+1.3);
+            Line(xcentre-9.0, ycentre, xcentre-3.0, ycentre-1.3);
+  
+            Line(xcentre+9.0, ycentre, xcentre+3.0, ycentre+1.3);
+            Line(xcentre+9.0, ycentre, xcentre+3.0, ycentre-1.3);
+
+            Line(xcentre, ycentre+9.0, xcentre-1.3, ycentre+3.0);
+            Line(xcentre, ycentre+9.0, xcentre+1.3, ycentre+3.0);
+
+                Line(xcentre-3.9, ycentre+3.9, xcentre-3.0, ycentre+1.3);
+            Line(xcentre-3.9, ycentre+3.9, xcentre-1.3, ycentre+3.0);
+
+            Line(xcentre+3.9, ycentre+3.9, xcentre+1.3, ycentre+3.0);
+            Line(xcentre+3.9, ycentre+3.9, xcentre+3.0, ycentre+1.3);
+
+            Line(xcentre-3.9, ycentre-3.9, xcentre-3.0, ycentre-1.3);
+            Line(xcentre-3.9, ycentre-3.9, xcentre-1.3, ycentre-2.6);
+
+            Line(xcentre+3.9, ycentre-3.9, xcentre+3.0, ycentre-1.3);
+            Line(xcentre+3.9, ycentre-3.9, xcentre+1.3, ycentre-2.6);
+
+            Line(xcentre-1.3, ycentre-2.6, xcentre, ycentre-27.0);
+         Line(xcentre+1.3, ycentre-2.6, xcentre, ycentre-27.0);
+
+  
+} 
+       //end suma
+
+//begin suma
+       //  draws the nadir symbol  for lowest possible dive angle (i,e 90 degree dive angle)
+
+
+void HudLadder ::
+drawNadir(float xfirst, float xlast, float yvalue)
+{
+
+            float xcentre = (xfirst + xlast)/2.0;
+                float ycentre = yvalue;    
+
+
+               float r = 7.5;
+               float ang,temp;
+               float x1,y1,x2,y2,xcent,ycent;
+
        
-       StippleLineList.draw( );
-       glDisable(GL_LINE_STIPPLE);
+        // to draw a circle
 
-//   } // if(div_units)
-    glPopMatrix();
-}
+               float xcent1, xcent2, ycent1, ycent2;
+               xcent1 = xcentre + r * cos(0.0);
+               ycent1 = ycentre + r * sin(0.0);
+       for(int count=1; count<=400; count++) 
+               {  
+                       float temp = count * 2 * 3.142 / 400.0;
+                   xcent2 = xcentre + r * cos(temp); 
+                       ycent2 = ycentre + r * sin(temp);                           
+                       
+                       Line(xcent1, ycent1, xcent2, ycent2);
+
+                       xcent1 = xcent2;
+                       ycent1 = ycent2;
+               }     
+               
+               xcent2 = xcentre + r * cos(0.0);
+               ycent2 = ycentre + r * sin(0.0);
+
+        drawOneLine(xcent1, ycent1, xcent2, ycent2); //to connect last point to first point
+               //end circle
+
+
+               Line(xcentre, ycentre+7.5, xcentre, ycentre+22.5); //to draw a line above the circle
+
+               Line(xcentre-7.5, ycentre, xcentre+7.5,ycentre); //line in the middle of circle
 
+               float theta = asin (2.5/7.5);
+               float theta1 = asin(5.0/7.5);
+
+                x1 = xcentre + r * cos(theta);
+                y1 = ycentre + 2.5;
+
+                x2 = xcentre + r * cos((180.0 * SGD_DEGREES_TO_RADIANS) - theta);
+                y2 = ycentre + 2.5;
+
+                Line(x1,y1,x2,y2);
+
+               
+                x1 = xcentre + r * cos(theta1);
+                y1 = ycentre + 5.0;
+
+                x2 = xcentre + r * cos((180.0 * SGD_DEGREES_TO_RADIANS)-theta1);
+                y2 = ycentre + 5.0;
+
+                Line(x1,y1,x2,y2);
+
+
+                x1 = xcentre + r * cos((180.0 * SGD_DEGREES_TO_RADIANS) +theta);
+                y1 = ycentre - 2.5;
+
+                x2 = xcentre + r * cos((360.0* SGD_DEGREES_TO_RADIANS)-theta);
+                y2 = ycentre - 2.5;
+
+                Line(x1,y1,x2,y2);
+
+               
+                x1 = xcentre + r * cos((180.0* SGD_DEGREES_TO_RADIANS) +theta1);
+                y1 = ycentre - 5.0;
+
+                x2 = xcentre + r * cos((360.0* SGD_DEGREES_TO_RADIANS)-theta1);
+                y2 = ycentre - 5.0;
+
+                Line(x1,y1,x2,y2);
+
+
+}