X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=src%2FCockpit%2Fhud.cxx;h=98b4f139493c6343c4ff93f719faaafcbd8cdccc;hb=029dda3297e3697438e1a58188527cbae90beebe;hp=83c8757232ddc01c48d264661ceff81f27d90b31;hpb=152a5902c82013c75ba4b09149523867b8d9d136;p=flightgear.git

diff --git a/src/Cockpit/hud.cxx b/src/Cockpit/hud.cxx
index 83c875723..98b4f1394 100644
--- a/src/Cockpit/hud.cxx
+++ b/src/Cockpit/hud.cxx
@@ -20,6 +20,11 @@
 //
 // $Id$
 
+#include <simgear/compiler.h>
+#include <simgear/structure/exception.hxx>
+
+#include STL_STRING
+#include STL_FSTREAM
 
 #ifdef HAVE_CONFIG_H
 #  include <config.h>
@@ -32,30 +37,30 @@
 #ifdef __BORLANDC__
 #  define exception c_exception
 #endif
+
 #include <math.h>
 
-#include <GL/glut.h>
 #include <stdlib.h>
-#include <string.h>
+#include <stdio.h>		// char related functions
+#include <string.h>		// strcmp()
+
+#include SG_GLU_H
 
 #include <simgear/constants.h>
 #include <simgear/debug/logstream.hxx>
-//#include <simgear/math/fg_random.h>
-//#include <simgear/math/polar3d.hxx>
+#include <simgear/props/props.hxx>
+#include <simgear/misc/sg_path.hxx>
 
 #include <Aircraft/aircraft.hxx>
-#include <Autopilot/newauto.hxx>
+#include <Autopilot/xmlauto.hxx>
 #include <GUI/gui.h>
 #include <Main/globals.hxx>
-#ifdef FG_NETWORK_OLK
-#include <NetworkOLK/network.h>
-#endif
+#include <Main/fg_props.hxx>
 #include <Scenery/scenery.hxx>
-//#include <Time/fg_timer.hxx>
 
-#if defined ( __sun__ ) || defined ( __sgi )
+#if defined (__sun) || defined ( __sgi )
 extern "C" {
-  extern void *memmove(void *, const void *, size_t);
+    extern void *memmove(void *, const void *, size_t);
 }
 #endif
 
@@ -81,10 +86,97 @@ int HUD_style = 0;
 float HUD_matrix[16];
 static float hud_trans_alpha = 0.67f;
 
+
+//$$$ begin - added, Neetha, 28 Nov 2k
+
+static string	name;
+static int		x;
+static int		y;
+static UINT    width;
+static UINT    height;
+static float	factor;
+static float   span_units;
+static float   division_units;
+static float   minor_division = 0;
+static UINT    screen_hole;
+static UINT    lbl_pos;
+static bool    working;
+static string  loadfn;
+static UINT	options;
+static float   maxValue;
+static float   minValue;
+static float   scaling;
+static UINT    major_divs;
+static UINT    minor_divs;
+static UINT    modulator;
+static int     dp_showing = 0;
+static string  label_format;
+static string  prelabel;
+static string  postlabel;
+static int     justi;
+static int		blinking;
+static float   maxBankAngle;
+static float   maxSlipAngle;
+static UINT    gap_width;
+static bool	latitude;
+static bool	longitude;
+static bool	tick_bottom;
+static bool	tick_top;
+static bool	tick_right;
+static bool	tick_left;
+static bool	cap_bottom;
+static bool	cap_top;
+static bool	cap_right;
+static bool	cap_left;
+static float   marker_off;
+static string  type;
+static bool    enable_pointer;
+static string  type_pointer;
+static bool    frl_spot;
+static bool	target;
+static bool    vel_vector;
+static bool    drift;
+static bool    alpha;
+static bool	energy;
+static bool	climb_dive;
+static bool	glide;
+static float	glide_slope_val;
+static bool	worm_energy;
+static bool	waypoint;
+static string type_tick;//hud
+static string length_tick;//hud
+static bool label_box;//hud
+static int digits; //suma
+static float radius; //suma
+static int divisions; //suma
+static int zoom; //suma
+static int zenith; //suma
+static int nadir ; //suma
+static int hat; //suma
+static bool tsi; //suma
+static float rad; //suma
+
+
+static FLTFNPTR load_fn;    
+static fgLabelJust justification;
+static const char *pre_label_string  = 0;
+static const char *post_label_string = 0;
+
+int readHud( istream &input );
+int readInstrument ( const SGPropertyNode * node);
+static instr_item * readLadder ( const SGPropertyNode * node);
+static instr_item * readCard ( const SGPropertyNode * node);
+static instr_item * readLabel( const SGPropertyNode * node);
+static instr_item * readTBI( const SGPropertyNode * node);
+//$$$ end   - added, Neetha, 28 Nov 2k
+
+static void drawHUD();
+static void fgUpdateHUDVirtual();
+
 void fgHUDalphaInit( void );
 
 class locRECT {
-  public:
+public:
     RECT rect;
 
     locRECT( UINT left, UINT top, UINT right, UINT bottom);
@@ -93,1286 +185,637 @@ class locRECT {
 
 locRECT :: locRECT( UINT left, UINT top, UINT right, UINT bottom)
 {
-  rect.left   =  left;
-  rect.top    =  top;
-  rect.right  =  right;
-  rect.bottom =  bottom;
+    rect.left   =  left;
+    rect.top    =  top;
+    rect.right  =  right;
+    rect.bottom =  bottom;
 
 }
 // #define DEBUG
 
-#ifdef OLD_CODE
-void drawOneLine( UINT x1, UINT y1, UINT x2, UINT y2)
+//========================= End of Class Implementations===================
+// fgHUDInit
+//
+// Constructs a HUD object and then adds in instruments. At the present
+// the instruments are hard coded into the routine. Ultimately these need
+// to be defined by the aircraft's instrumentation records so that the
+// display for a Piper Cub doesn't show the speed range of a North American
+// mustange and the engine readouts of a B36!
+//
+
+#define INSTRDEFS 21
+
+//$$$ begin - added, Neetha, 28 Nov 2k
+static instr_item * 
+readLadder(const SGPropertyNode * node)
 {
-  glBegin(GL_LINES);
-  glVertex2f(x1, y1);
-  glVertex2f(x2, y2);
-  glEnd();
-}
 
-void drawOneLine( RECT &rect)
+    instr_item *p;
+
+    name			= node->getStringValue("name");
+    x				= node->getIntValue("x");
+    y				= node->getIntValue("y");
+    width			= node->getIntValue("width");
+    height			= node->getIntValue("height");
+    factor			= node->getFloatValue("compression_factor");
+    span_units		= node->getFloatValue("span_units");
+    division_units	= node->getFloatValue("division_units");
+    screen_hole		= node->getIntValue("screen_hole");
+    lbl_pos			= node->getIntValue("lbl_pos");
+    frl_spot		= node->getBoolValue("enable_frl",false);
+    target			= node->getBoolValue("enable_target_spot",false);
+    vel_vector		= node->getBoolValue("enable_velocity_vector",false);
+    drift			= node->getBoolValue("enable_drift_marker",false);
+    alpha			= node->getBoolValue("enable_alpha_bracket",false);
+    energy			= node->getBoolValue("enable_energy_marker",false);
+    climb_dive		= node->getBoolValue("enable_climb_dive_marker",false);
+    glide			= node->getBoolValue("enable_glide_slope_marker",false);
+    glide_slope_val	= node->getFloatValue("glide_slope",-4.0);
+    worm_energy		= node->getBoolValue("enable_energy_marker",false);
+    waypoint		= node->getBoolValue("enable_waypoint_marker",false);
+    working			= node->getBoolValue("working");
+    zenith			= node->getIntValue("zenith");  //suma
+    nadir			= node->getIntValue("nadir");  //suma
+    hat				= node->getIntValue("hat");
+    // The factor assumes a base of 55 degrees per 640 pixels.
+    // Invert to convert the "compression" factor to a
+    // pixels-per-degree number.
+    if(fgGetBool("/sim/hud/enable3d", true))
+    {
+        if (HUD_style == 1)
+        {
+            factor = 1;
+            factor = (640./55.) / factor;
+        }
+    }
+
+    SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
+	
+    p = (instr_item *) new HudLadder( name, x, y,
+                                      width, height, factor,
+                                      get_roll, get_pitch,
+                                      span_units, division_units, minor_division,
+                                      screen_hole, lbl_pos, frl_spot, target, vel_vector, 
+                                      drift, alpha, energy, climb_dive, 
+                                      glide, glide_slope_val, worm_energy, 
+                                      waypoint, working, zenith, nadir, hat);
+				
+    return p;
+		
+} //end readLadder
+
+static instr_item * 
+readCard(const SGPropertyNode * node)
 {
-  glBegin(GL_LINES);
-  glVertex2f(rect.left, rect.top);
-  glVertex2f(rect.right, rect.bottom);
-  glEnd();
-}
 
-//
-// The following code deals with painting the "instrument" on the display
-//
-   /* textString - Bitmap font string */
+    instr_item *p;
+
+    name			= node->getStringValue("name");
+    x				= node->getIntValue("x");
+    y				= node->getIntValue("y");
+    width			= node->getIntValue("width");
+    height			= node->getIntValue("height");
+    loadfn			= node->getStringValue("loadfn");
+    options			= node->getIntValue("options");
+    maxValue		= node->getFloatValue("maxValue");
+    minValue		= node->getFloatValue("minValue");
+    scaling			= node->getFloatValue("disp_scaling");
+    major_divs		= node->getIntValue("major_divs");
+    minor_divs		= node->getIntValue("minor_divs");
+    modulator		= node->getIntValue("modulator");
+    span_units		= node->getFloatValue("value_span");
+    type			= node->getStringValue("type");
+    tick_bottom	    = node->getBoolValue("tick_bottom",false);
+    tick_top		= node->getBoolValue("tick_top",false);
+    tick_right		= node->getBoolValue("tick_right",false);
+    tick_left		= node->getBoolValue("tick_left",false);
+    cap_bottom		= node->getBoolValue("cap_bottom",false);
+    cap_top			= node->getBoolValue("cap_top",false);
+    cap_right		= node->getBoolValue("cap_right",false);
+    cap_left		= node->getBoolValue("cap_left",false);
+    marker_off		= node->getFloatValue("marker_offset",0.0);
+    enable_pointer	= node->getBoolValue("enable_pointer",true);
+    type_pointer	= node->getStringValue("pointer_type");
+    type_tick		= node->getStringValue("tick_type");//hud Can be 'circle' or 'line'
+    length_tick		= node->getStringValue("tick_length");//hud For variable length
+    working			= node->getBoolValue("working");
+    radius			= node->getFloatValue("radius"); //suma
+    divisions		= node->getIntValue("divisions"); //suma
+    zoom			= node->getIntValue("zoom"); //suma
+
+    SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
+
+
+    if(type=="gauge") {
+        span_units = maxValue - minValue;
+    }
 
-void textString( int x, int y, char *msg, void *font ){
+    if (loadfn=="anzg") {
+        load_fn = get_anzg;
+    } else if (loadfn=="heading") {
+        load_fn = get_heading;
+    } else if (loadfn=="aoa") {
+        load_fn = get_aoa;
+    } else if (loadfn=="climb") {
+        load_fn = get_climb_rate;
+    } else if (loadfn=="altitude") {
+        load_fn = get_altitude;
+    } else if (loadfn=="agl") {
+        load_fn = get_agl;
+    } else if (loadfn=="speed") {
+        load_fn = get_speed;
+    } else if (loadfn=="view_direction") {
+        load_fn = get_view_direction;
+    } else if (loadfn=="aileronval") {
+        load_fn = get_aileronval;
+    } else if (loadfn=="elevatorval") {
+        load_fn = get_elevatorval;
+    } else if (loadfn=="elevatortrimval") {
+        load_fn = get_elev_trimval;
+    } else if (loadfn=="rudderval") {
+        load_fn = get_rudderval;
+    } else if (loadfn=="throttleval") {
+        load_fn = get_throttleval;
+    }
 
-    if(*msg)
-    {
-//      puDrawString (  NULL, msg, x, y );
-        glRasterPos2f(x, y);
-        while (*msg) {
-            glutBitmapCharacter(font, *msg);
-            msg++;
+
+    if ( (type == "dial") | (type == "tape") ) {
+        p = (instr_item *) new hud_card( x,
+                                         y,  
+                                         width,
+                                         height,
+                                         load_fn,
+                                         options,
+                                         maxValue, minValue,
+                                         scaling,
+                                         major_divs, minor_divs,
+                                         modulator,
+                                         dp_showing,
+                                         span_units,
+                                         type,
+                                         tick_bottom,
+                                         tick_top,
+                                         tick_right,
+                                         tick_left,
+                                         cap_bottom,
+                                         cap_top,
+                                         cap_right,
+                                         cap_left,
+                                         marker_off,
+                                         enable_pointer,
+                                         type_pointer,
+                                         type_tick,//hud
+                                         length_tick,//hud
+                                         working,
+                                         radius, //suma
+                                         divisions, //suma
+                                         zoom  //suma
+                                         );
+    } else {
+        p = (instr_item *) new  gauge_instr( x,            // x
+                                             y,  // y
+                                             width,            // width
+                                             height,            // height
+                                             load_fn, // data source
+                                             options,
+                                             scaling,
+                                             maxValue,minValue,
+                                             major_divs, minor_divs,
+                                             dp_showing,
+                                             modulator,
+                                             working);
+    }
+
+    return p;
+}// end readCard
+
+static instr_item *
+readLabel(const SGPropertyNode * node)
+{
+    instr_item *p;
+
+    int font_size = (fgGetInt("/sim/startup/xsize") > 1000) ? HUD_FONT_LARGE : HUD_FONT_SMALL;
+
+    name		= node->getStringValue("name");
+    x                   = node->getIntValue("x");
+    y                   = node->getIntValue("y");
+    width               = node->getIntValue("width");
+    height		= node->getIntValue("height");
+    loadfn		= node->getStringValue("data_source");
+    label_format	= node->getStringValue("label_format");
+    prelabel		= node->getStringValue("pre_label_string");
+    postlabel		= node->getStringValue("post_label_string");
+    scaling		= node->getFloatValue("scale_data");
+    options		= node->getIntValue("options");
+    justi		= node->getIntValue("justification");
+    blinking            = node->getIntValue("blinking");
+    latitude		= node->getBoolValue("latitude",false);
+    longitude		= node->getBoolValue("longitude",false);
+    label_box		= node->getBoolValue("label_box",false);//hud
+    working             = node->getBoolValue("working");
+    digits		= node->getIntValue("digits"); //suma
+
+
+    SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
+
+
+    if ( justi == 0 ) {
+        justification = LEFT_JUST;
+    } else {
+        if ( justi == 1 ) {
+            justification = CENTER_JUST;
+        } else {
+            if ( justi == 2 ) {
+                justification = RIGHT_JUST;
+            }
+        }
+    }
+
+    if ( prelabel == "NULL" ) {
+        pre_label_string = NULL;
+    } else {
+        if ( prelabel == "blank" ) {
+            pre_label_string = " ";
+        } else {
+            pre_label_string = prelabel.c_str();
+        }
+    }
+
+    if ( postlabel == "blank" ) {
+        post_label_string = " ";
+    } else {
+        if ( postlabel == "NULL" ) {
+            post_label_string = NULL;
+        } else {
+            if ( postlabel == "units" ) {
+                post_label_string = units;
+            } else {
+                post_label_string = postlabel.c_str();
+            }
         }
     }
+
+#ifdef ENABLE_SP_FMDS
+    if ( loadfn== "aux1" ) {
+        load_fn = get_aux1;
+    } else if ( loadfn == "aux2" ) {
+        load_fn = get_aux2;
+    } else if ( loadfn == "aux3" ) {
+        load_fn = get_aux3;
+    } else if ( loadfn == "aux4" ) {
+        load_fn = get_aux4;
+    } else if ( loadfn == "aux5" ) {
+        load_fn = get_aux5;
+    } else if ( loadfn == "aux6" ) {
+        load_fn = get_aux6;
+    } else if ( loadfn == "aux7" ) {
+        load_fn = get_aux7;
+    } else if ( loadfn == "aux8" ) {
+        load_fn = get_aux8;
+    } else if ( loadfn == "aux9" ) {
+        load_fn = get_aux9;
+    } else if ( loadfn == "aux10" ) {
+        load_fn = get_aux10;
+    } else if ( loadfn == "aux11" ) {
+        load_fn = get_aux11;
+    } else if ( loadfn == "aux12" ) {
+        load_fn = get_aux12;
+    } else if ( loadfn == "aux13" ) {
+        load_fn = get_aux13;
+    } else if ( loadfn == "aux14" ) {
+        load_fn = get_aux14;
+    } else if ( loadfn == "aux15" ) {
+        load_fn = get_aux15;
+    } else if ( loadfn == "aux16" ) {
+        load_fn = get_aux16;
+    } else if ( loadfn == "aux17" ) {
+        load_fn = get_aux17;
+    } else if ( loadfn == "aux18" ) {
+        load_fn = get_aux18;
+    } else
+#endif
+      if ( loadfn == "ax" ) {
+        load_fn = get_Ax;
+    } else if ( loadfn == "speed" ) {
+        load_fn = get_speed;
+    } else if ( loadfn == "mach" ) {
+        load_fn = get_mach;
+    } else if ( loadfn == "altitude" ) {
+        load_fn = get_altitude;
+    } else if ( loadfn == "agl" ) {
+        load_fn = get_agl;
+    } else if ( loadfn == "framerate" ) {
+        load_fn = get_frame_rate;
+    } else if ( loadfn == "heading" ) {
+        load_fn = get_heading;
+    } else if ( loadfn == "fov" ) {
+        load_fn = get_fov;
+    } else if ( loadfn == "vfc_tris_culled" ) {
+        load_fn = get_vfc_tris_culled;
+    } else if ( loadfn == "vfc_tris_drawn" ) {
+        load_fn = get_vfc_tris_drawn;
+    } else if ( loadfn == "aoa" ) {
+        load_fn = get_aoa;
+    } else if ( loadfn == "latitude" ) {
+        load_fn  = get_latitude;
+    } else if ( loadfn == "anzg" ) {
+        load_fn = get_anzg;
+    } else if ( loadfn == "longitude" ) {
+        load_fn   = get_longitude;
+    } else if (loadfn=="throttleval") {
+        load_fn = get_throttleval;
+    }
+
+    p = (instr_item *) new instr_label ( x,
+                                         y,
+                                         width,
+                                         height,
+                                         load_fn,
+                                         label_format.c_str(),
+                                         pre_label_string,
+                                         post_label_string,
+                                         scaling,
+                                         options,
+                                         justification,
+                                         font_size,
+                                         blinking,
+                                         latitude,
+                                         longitude,
+                                         label_box, //hud
+                                         working,
+                                         digits); //suma
+
+    return p;
+} // end readLabel
+
+static instr_item * 
+readTBI(const SGPropertyNode * node)
+{
+
+    instr_item *p;
+
+    name           = node->getStringValue("name");
+    x              = node->getIntValue("x");
+    y              = node->getIntValue("y");
+    width          = node->getIntValue("width");
+    height         = node->getIntValue("height");
+    maxBankAngle   = node->getFloatValue("maxBankAngle");
+    maxSlipAngle   = node->getFloatValue("maxSlipAngle");
+    gap_width      = node->getIntValue("gap_width");
+    working        = node->getBoolValue("working");
+    tsi			   = node->getBoolValue("tsi"); //suma
+    rad			   = node->getFloatValue("rad"); //suma
+
+    SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
+
+
+    p = (instr_item *) new fgTBI_instr(	x,
+                                        y,  
+                                        width,
+                                        height,
+                                        get_roll,
+                                        get_sideslip,
+                                        maxBankAngle, 
+                                        maxSlipAngle,
+                                        gap_width,
+                                        working,
+                                        tsi, //suma
+                                        rad); //suma
+
+    return p;
+} //end readTBI
+
+static instr_item * 
+readRunway(const SGPropertyNode * node) {
+	name	= node->getStringValue("name");
+	x	= node->getIntValue("x");
+	y	= node->getIntValue("y");
+	width = node->getIntValue("width");
+	height = node->getIntValue("height");
+	scaling	= node->getDoubleValue("scale");
+	working = node->getBoolValue("working",true);
+	runway_instr *ri = new runway_instr(x,y,width,height,scaling,working);
+	double scale = node->getDoubleValue("arrow_scale",1.0);	
+	ri->setDrawArrow((scale>0)?true:false);
+	ri->setDrawArrowAlways((scale>0)?node->getBoolValue("arrow_always"):false);
+	ri->setStippleOutline(node->getIntValue("outer_stipple",0xFFFF));
+	ri->setStippleCenterline(node->getIntValue("center_stipple",0xFFFF));
+	ri->setArrowRotationRadius(node->getDoubleValue("arrow_radius"));
+	ri->setArrowScale(scale);
+	ri->setLineScale(node->getDoubleValue("line_scale",1.0));
+	ri->setScaleDist(node->getDoubleValue("scale_dist_nm"));
+	SG_LOG(SG_INPUT, SG_INFO, "Done reading instrument " << name);
+	return (instr_item *) ri;
 }
 
 
-/* strokeString - Stroke font string */
-void strokeString(int x, int y, char *msg, void *font, float theta)
+int readInstrument(const SGPropertyNode * node)
 {
-    int xx;
-    int yy;
-    int c;
-    float sintheta,costheta;
+    static const SGPropertyNode *startup_units_node
+        = fgGetNode("/sim/startup/units");
+
+    instr_item *HIptr;
     
+    if ( !strcmp(startup_units_node->getStringValue(), "feet") ) {
+        strcpy(units, " ft");
+    } else {
+        strcpy(units, " m");
+    }
 
-    if(*msg)
-    {
-    glPushMatrix();
-    glRotatef(theta * RAD_TO_DEG, 0.0, 0.0, 1.0);
-    sintheta = sin(theta);
-    costheta = cos(theta);
-    xx = (int)(x * costheta + y * sintheta);
-    yy = (int)(y * costheta - x * sintheta);
-    glTranslatef( xx, yy, 0);
-    glScalef(.1, .1, 0.0);
-    while( (c=*msg++) ) {
-        glutStrokeCharacter(font, c);
+    const SGPropertyNode * ladder_group = node->getNode("ladders");
+
+    if (ladder_group != 0) {
+        int nLadders = ladder_group->nChildren();
+        for (int j = 0; j < nLadders; j++) {
+            
+            HIptr = readLadder(ladder_group->getChild(j));
+            HUD_deque.insert( HUD_deque.begin(), HIptr);
+					
+        }// for - ladders
     }
-    glPopMatrix();
+
+    const SGPropertyNode * card_group = node->getNode("cards");
+    if (card_group != 0) {
+        int nCards = card_group->nChildren();
+        for (int j = 0; j < nCards; j++) {
+            
+            HIptr = readCard(card_group->getChild(j));
+            HUD_deque.insert( HUD_deque.begin(), HIptr);
+
+        }//for - cards
     }
-}
 
-int getStringWidth ( char *str )
+    const SGPropertyNode * label_group = node->getNode("labels");
+    if (label_group != 0) {
+        int nLabels = label_group->nChildren();
+        for (int j = 0; j < nLabels; j++) {
+
+            HIptr = readLabel(label_group->getChild(j));
+            HUD_deque.insert( HUD_deque.begin(), HIptr);
+
+        }//for - labels
+    }
+
+    const SGPropertyNode * tbi_group = node->getNode("tbis");
+    if (tbi_group != 0) {
+        int nTbis = tbi_group->nChildren();
+        for (int j = 0; j < nTbis; j++) {
+
+            HIptr = readTBI(tbi_group->getChild(j));
+            HUD_deque.insert( HUD_deque.begin(), HIptr);
+
+        }//for - tbis
+    }
+    
+    const SGPropertyNode * rwy_group = node->getNode("runways");
+    if (rwy_group != 0) {
+        int nRwy = rwy_group->nChildren();
+        for (int j = 0; j < nRwy; j++) {
+            SG_LOG( SG_COCKPIT, SG_DEBUG,
+                    "**************  Reading runway properties" );
+            HIptr = readRunway(rwy_group->getChild(j));
+            HUD_deque.insert( HUD_deque.begin(), HIptr);
+
+        }//for - runways
+    }    
+    return 0;
+}//end readinstrument
+
+
+int readHud( istream &input ) 
 {
-    if ( HUDtext && str )
-    {
-        float r, l ;
-        guiFntHandle->getBBox ( str, HUD_TextSize, 0, &l, &r, NULL, NULL ) ;
-        return FloatToInt( r - l );
+
+    SGPropertyNode root;
+
+    try {
+        readProperties(input, &root);
+    } catch (const sg_exception &e) {
+        guiErrorMessage("Error reading HUD: ", e);
+        return 0;
     }
-    return 0 ;
-}
-#endif // OLD_CODE
+  
+	
+    SG_LOG(SG_INPUT, SG_INFO, "Read properties for  " <<
+           root.getStringValue("name"));
 
-//========================= End of Class Implementations===================
-// fgHUDInit
-//
-// Constructs a HUD object and then adds in instruments. At the present
-// the instruments are hard coded into the routine. Ultimately these need
-// to be defined by the aircraft's instrumentation records so that the
-// display for a Piper Cub doesn't show the speed range of a North American
-// mustange and the engine readouts of a B36!
-//
 
-#define INSTRDEFS 21
+    HUD_deque.erase( HUD_deque.begin(), HUD_deque.end());  // empty the HUD deque
+
+
+    SG_LOG(SG_INPUT, SG_INFO, "Reading Hud instruments");
+
+    const SGPropertyNode * instrument_group = root.getChild("instruments");
+    int nInstruments = instrument_group->nChildren();
+
+    for (int i = 0; i < nInstruments; i++) {
+		
+        const SGPropertyNode * node = instrument_group->getChild(i);
+
+        SGPath path( globals->get_fg_root() );
+        path.append(node->getStringValue("path"));
+
+        SG_LOG(SG_INPUT, SG_INFO, "Reading Instrument "
+               << node->getName()
+               << " from "
+               << path.str());
+
+        SGPropertyNode root2;
+        try {
+            readProperties(path.str(), &root2);
+        } catch (const sg_exception &e) {
+            guiErrorMessage("Error reading HUD instrument: ", e);
+            continue;
+        } 
+        readInstrument(&root2);
+    }//for loop(i)
+
+    return 0;
+}
+
 
 int fgHUDInit( fgAIRCRAFT * /* current_aircraft */ )
 {
-    instr_item *HIptr;
-    //  int index;
-
-    // $$$ begin - added VS Renganathan
-#ifdef FIGHTER_HUD
-    //  int off = 400;
-    int min_x = 200; 
-    int max_x = 440; 
-    //  int min_y = 100;
-    int max_y = 380; 
-    int cen_x = 320;
-    int cen_y = 240;
-    unsigned int text_h = 10;
-    unsigned int ladr_w2 = 60;
-    int ladr_h2 = 90;
-    int ladr_t = 35;
-    int compass_w = 120;
-    int gap = 10;
-#else
-    // $$$ end - added VS Renganathan
-
-    //  int off = 50;
-    int min_x = 25; //off/2;
-    int max_x = 615; //640-(off/2);
-    //  int min_y = off;
-    int max_y = 430; //480-off;
-    int cen_x = 320;
-    int cen_y = 240;
-    unsigned int text_h = 10;
-    unsigned int ladr_w2 = 60;
-    int ladr_h2 = 90;
-    int ladr_t = 35;
-    int compass_w = 200;
-    int gap = 10;
-#endif
 
-//  int font_size = globals->get_options()->get_xsize() / 60;
-  int font_size = (globals->get_options()->get_xsize() > 1000) ? LARGE : SMALL;
-  
-  HUD_style = 1;
-
-  FG_LOG( FG_COCKPIT, FG_INFO, "Initializing current aircraft HUD" );
-
-//  deque < instr_item * > :: iterator first = HUD_deque.begin();
-//  deque < instr_item * > :: iterator last = HUD_deque.end();
-//  HUD_deque.erase( first, last);  // empty the HUD deque  
-
-  HUD_deque.erase( HUD_deque.begin(), HUD_deque.end());  // empty the HUD deque
-
-//  hud->code = 1;
-//  hud->status = 0;
-
-  // For now lets just hardcode the hud here.
-  // In the future, hud information has to come from the same place
-  // aircraft information came from.
-
-//  fgHUDSetTimeMode( hud, NIGHT );
-//  fgHUDSetBrightness( hud, BRT_LIGHT );
-
-//      case 0:     // TBI
-//  int x = 290; /*cen_x-30*/
-//  int y = 45;  /*off-5*/
-//  HIptr = (instr_item *) new fgTBI_instr( x, y, ladr_w2, text_h );
-// $$$ begin - added, VS Renganathan 13 Oct 2K
-#ifdef FIGHTER_HUD
-//      case 1:     // Artificial Horizon
-  HIptr = (instr_item *) new HudLadder( cen_x-ladr_w2, cen_y-ladr_h2,
-                                        2*ladr_w2, 2*ladr_h2 );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 4:    // GYRO COMPASS
-  HIptr = (instr_item *) new hud_card( cen_x-(compass_w/2),
-                                       cen_y+8.0,  //CENTER_DIAMOND_SIZE
-                                       compass_w,
-                                       28,
-                                       get_heading,
-                                       HUDS_TOP,
-                                       360, 0,
-                                       1.0,
-                                       10,   1,
-                                       360,
-                                       0,
-                                       25,
-                                       true);
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 10:    // Digital KIAS
-        HIptr = (instr_item *) new instr_label ( cen_x-190,
-                                                 cen_y+25,
-                                                  40,
-                                                  30,
-                                                 get_speed,
-                                                 "%5.0f",
-                                                 NULL,
-                                                 " ",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 RIGHT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-// Mach no
-        HIptr = (instr_item *) new instr_label ( cen_x-180,
-                                                 cen_y+5,
-                                                  40,
-                                                  30,
-                                                 get_mach,
-                                                 "%5.2f",
-                                                 NULL,
-                                                 " ",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 RIGHT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-// Pressure Altitude
-        HIptr = (instr_item *) new instr_label ( cen_x+110,
-                                                 cen_y+25,
-                                                  40,
-                                                  30,
-                                                 get_altitude,
-                                                 "%5.0f",
-                                                 NULL,
-                                                 " ",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 LEFT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-// Radio Altitude
-        HIptr = (instr_item *) new instr_label ( cen_x+110,
-                                                 cen_y+5,
-                                                  40,
-                                                  30,
-                                                 get_agl,
-                                                 "%5.0f",
-                                                 NULL,
-                                                 " R",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 LEFT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 2:    // AOA
-  HIptr = (instr_item *) new hud_card( cen_x-145.0, //min_x +18,
-                                       cen_y-190,
-                                       28,
-                                       120,
-                                       get_aoa,
-                                       HUDS_LEFT | HUDS_VERT,
-//                                       HUDS_RIGHT | HUDS_VERT,                                     
-                                       30.0, -15.0,
-                                       1.0,
-                                       10,  2,
-                                       0,
-                                       0,
-                                       60.0,
-                                       true);
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-//      case 2:    // normal acceleration at cg, g's
-  HIptr = (instr_item *) new hud_card( cen_x-185, //min_x +18,
-                                       cen_y-220,
-                                       18,
-                                       130,
-                                       get_anzg,
-                                       HUDS_LEFT | HUDS_VERT,
-//                                       HUDS_RIGHT | HUDS_VERT,                                     
-                                       10.0, -5.0,
-                                       1.0,
-                                       2,  1,
-                                       0,
-                                       0,
-                                       20.0,
-                                       true);
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-//      case 2:    // VSI
-  HIptr = (instr_item *) new hud_card( (2*cen_x)-195.0, //min_x +18,
-                                       cen_y-190,
-                                       28,
-                                       120,
-                                       get_climb_rate, //fix
-//                                       HUDS_LEFT | HUDS_VERT,
-                                       HUDS_RIGHT | HUDS_VERT,                                     
-                                       500.0, -500.0,
-                                       1.0,
-                                       5,  1,
-                                       0,
-                                       0,
-                                       15.0,
-                                       true);
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-
-// Aux parameter 16 - xposn
-        HIptr = (instr_item *) new instr_label ( cen_x+170,
-                                                 cen_y+200,
-                                                  40,
-                                                  30,
-                                                 get_aux16,
-                                                 "%5.1f",
-                                                 NULL,
-                                                 " pstick",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 LEFT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-  
+    HUD_style = 1;
 
-// Aux parameter 17 - xposn
-        HIptr = (instr_item *) new instr_label ( cen_x+170,
-                                                 cen_y+190,
-                                                  40,
-                                                  30,
-                                                 get_aux17,
-                                                 "%5.1f",
-                                                 NULL,
-                                                 " rstick",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 LEFT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-  
-  
-  
-  
-  
-  
-  
-// Aux parameter 1 - xposn
-        HIptr = (instr_item *) new instr_label ( cen_x+240,
-                                                 cen_y+200,
-                                                  40,
-                                                  30,
-                                                 get_aux1,
-                                                 "%5.0f",
-                                                 NULL,
-                                                 " m",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 LEFT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-// Aux parameter 2 - pla
-        HIptr = (instr_item *) new instr_label ( cen_x+240,
-                                                 cen_y+190,
-                                                  40,
-                                                  30,
-                                                 get_aux9,
-                                                 "%5.0f",
-                                                 NULL,
-                                                 " pla",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 LEFT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-// Aux parameter 3 - xtd
-        HIptr = (instr_item *) new instr_label ( cen_x+240,
-                                                 cen_y+170,
-                                                  40,
-                                                  30,
-                                                 get_aux11,
-                                                 "%5.1f",
-                                                 NULL,
-                                                 " xtd",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 LEFT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-// Aux parameter 4 - ytd
-        HIptr = (instr_item *) new instr_label ( cen_x+240,
-                                                 cen_y+160,
-                                                  40,
-                                                  30,
-                                                 get_aux12,
-                                                 "%5.1f",
-                                                 NULL,
-                                                 " ytd",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 LEFT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-// Aux parameter 5 - nztd
-        HIptr = (instr_item *) new instr_label ( cen_x+240,
-                                                 cen_y+150,
-                                                  40,
-                                                  30,
-                                                 get_aux10,
-                                                 "%5.1f",
-                                                 NULL,
-                                                 " nztd",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 LEFT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-// Aux parameter 6 - vvtd
-        HIptr = (instr_item *) new instr_label ( cen_x+240,
-                                                 cen_y+140,
-                                                  40,
-                                                  30,
-                                                 get_aux13,
-                                                 "%5.1f",
-                                                 NULL,
-                                                 " vvtd",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 LEFT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-// Aux parameter 7 - vtd
-        HIptr = (instr_item *) new instr_label ( cen_x+240,
-                                                 cen_y+130,
-                                                  40,
-                                                  30,
-                                                 get_aux14,
-                                                 "%5.1f",
-                                                 NULL,
-                                                 " vtd",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 LEFT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-// Aux parameter 8 - alftd
-        HIptr = (instr_item *) new instr_label ( cen_x+240,
-                                                 cen_y+120,
-                                                  40,
-                                                  30,
-                                                 get_aux15,
-                                                 "%5.1f",
-                                                 NULL,
-                                                 " alftd",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 LEFT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-// Aux parameter 9 - fnr
-        HIptr = (instr_item *) new instr_label ( cen_x+240,
-                                                 cen_y+100,
-                                                  40,
-                                                  30,
-                                                 get_aux8,
-                                                 "%5.1f",
-                                                 NULL,
-                                                 " fnose",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 LEFT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-// Aux parameter 10 - Ax
-        HIptr = (instr_item *) new instr_label ( cen_x+240,
-                                                 cen_y+90,
-                                                  40,
-                                                  30,
-                                                 get_Ax,
-                                                 "%5.2f",
-                                                 NULL,
-                                                 " Ax",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 LEFT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-#else
-// $$$ end - added , VS Renganathan 13 Oct 2K
-
-  HIptr = (instr_item *) new fgTBI_instr( 290, 45, 60, 10 );  
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 1:     // Artificial Horizon
-  HIptr = (instr_item *) new HudLadder( cen_x-ladr_w2, cen_y-ladr_h2,
-                                        2*ladr_w2, 2*ladr_h2 );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 4:    // GYRO COMPASS
-  HIptr = (instr_item *) new hud_card( cen_x-(compass_w/2),
-                                       max_y,
-                                       compass_w,
-                                       28,
-                                       get_heading,
-                                       HUDS_TOP,
-                                       360, 0,
-                                       1.0,
-                                       5,   1,
-                                       360,
-                                       0,
-                                       25,
-                                       true);
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 5:    // AMSL
-  HIptr = (instr_item *) new hud_card( max_x - 35 -15, // 15 to balance speed card
-                                       cen_y-(compass_w/2),
-                                       35,
-                                       compass_w,
-                                       get_altitude,
-//                                     HUDS_RIGHT | HUDS_VERT,
-                                       HUDS_LEFT | HUDS_VERT,
-                                       5000, -1000,
-                                       1.0,
-                                       100,  25,
-                                       0,
-                                       0,
-                                       250,
-                                       true);
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 6:
-  HIptr = (instr_item *) new  guage_instr( cen_x-50,            // x
-                                           cen_y + ladr_h2 -20,  // y
-                                           100,            // width
-                                           20,            // height
-                                           get_aileronval, // data source
-                                           HUDS_BOTTOM | HUDS_NOTEXT,
-                                           100.0,
-                                           +1.0,
-                                           -1.0);
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 3:    // Radio Altimeter
-  HIptr = (instr_item *) new hud_card( cen_x + ladr_w2 + gap + 13 + ladr_t,
-                                       cen_y-75,
-                                       25,
-                                       150,
-                                       get_agl,
-                                       HUDS_LEFT | HUDS_VERT,
-                                       1000, 0,
-                                       1.0,
-                                       25, 5,
-                                       0,
-                                       0,
-                                       200.0,
-                                       true);
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 7:
-  HIptr = (instr_item *) new  guage_instr( cen_x -ladr_w2 -gap -13 -20 -ladr_t,
-                                           cen_y-50,             // y
-                                           20,             // width
-                                           100,             // height
-                                           get_elevatorval, // data source
-                                           HUDS_RIGHT | HUDS_VERT | HUDS_NOTEXT,
-                                           -100.0,           // Scale data
-                                           +1.0,           // Data Range
-                                           -1.0);
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 8:
-  HIptr = (instr_item *) new  guage_instr( cen_x-50,             // x
-                                           cen_y -gap -ladr_w2 -20, //-85   // y
-                                           100,             // width
-                                           20,             // height
-                                           get_rudderval,   // data source
-                                           HUDS_TOP | HUDS_NOTEXT,
-                                           100.0,
-                                           +1.0,
-                                           -1.0);
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 2:    // KIAS
-  HIptr = (instr_item *) new hud_card( min_x +10 +5, //min_x +18,
-                                       cen_y-(compass_w/2),
-                                       28,
-                                       compass_w,
-                                       get_speed,
-//                                     HUDS_LEFT | HUDS_VERT,
-                                       HUDS_RIGHT | HUDS_VERT,                                     
-                                       200.0, 0.0,
-                                       1.0,
-                                       10,  5,
-                                       0,
-                                       0,
-                                       50.0,
-                                       true);
+    SG_LOG( SG_COCKPIT, SG_INFO, "Initializing current aircraft HUD" );
 
-  
- 
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-    
+    string hud_path =
+	fgGetString("/sim/hud/path", "Huds/Default/default.xml");
+    SGPath path(globals->get_fg_root());
+    path.append(hud_path);
+	
+    ifstream input(path.c_str());
+    if (!input.good()) {
+        SG_LOG(SG_INPUT, SG_ALERT,
+               "Cannot read Hud configuration from " << path.str());
+    } else {
+        readHud(input);
+        input.close();
+    }
 
-//      case 10:    // Digital Mach number
-        HIptr = (instr_item *) new instr_label ( min_x , //same as speed tape
-                                                 cen_y-(compass_w/2) -10, //below speed tape
-                                                  40,
-                                                  30,
-                                                 get_mach,
-                                                 "%4.2f",
-                                                 "",
-                                                 NULL,
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 RIGHT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 9:
-  HIptr = (instr_item *) new  guage_instr( min_x-10,           // x
-                                           cen_y -75,       // y 
-                                           20,              // width
-                                           150,             // height
-                                           get_throttleval, // data source
-//                                         HUDS_VERT | HUDS_RIGHT | HUDS_NOTEXT,
-                                           HUDS_VERT | HUDS_LEFT | HUDS_NOTEXT,                                        100.0,
-                                           1.0,
-                                           0.0
-                                          );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-#endif
-// Remove this when below uncommented       
-//      case 10:
-  HIptr = (instr_item *) new instr_label( 10,
-                                          25,
-                                          60,
-                                          10,
-                                          get_frame_rate,
-                                          "%5.1f",
-                                          "",
-                                          NULL,
-                                          1.0,
-                                          HUDS_TOP,
-                                          RIGHT_JUST,
-                                          font_size,
-                                          0,
-                                          TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-  
-// $$$ begin - added VS Renganthan 19 Oct 2K
-#ifdef FIGHTER_HUD
-  HIptr = (instr_item *) new lat_label(  70,
-                                          40,    
-                                          1,
-                                          text_h,
-                                          get_latitude,
-                                          "%s%", //"%.0f",
-                                          "", //"Lat ",
-                                          "",
-                                          1.0,
-                                          HUDS_TOP,
-                                          CENTER_JUST,
-                                          font_size,
-                                          0,
-                                          TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-    
-    HIptr = (instr_item *) new lon_label( 475,
-                                          40,
-                                          1, text_h,
-                                          get_longitude,
-                                          "%s%",//"%.0f",
-                                          "", //"Lon ", 
-                                          "",
-                                          1.0,
-                                          HUDS_TOP,
-                                          CENTER_JUST,
-                                          font_size,
-                                          0,
-                                          TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-#else
-    HIptr = (instr_item *) new lat_label(  (cen_x - (compass_w/2))/2,
-                                          max_y,    
-                                          1,
-                                          text_h,
-                                          get_latitude,
-                                          "%s%", //"%.0f",
-                                          "", //"Lat ",
-                                          "",
-                                          1.0,
-                                          HUDS_TOP,
-                                          CENTER_JUST,
-                                          font_size,
-                                          0,
-                                          TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
+    fgHUDalphaInit();
+    fgHUDReshape();
+
+    if ( HUDtext ) {
+        // this chunk of code is not necessarily thread safe if the
+        // compiler optimizer reorders these statements.  Note that
+        // "delete ptr" does not set "ptr = NULL".  We have to do that
+        // ourselves.
+        fntRenderer *tmp = HUDtext;
+        HUDtext = NULL;
+        delete tmp;
+    }
+
+//    HUD_TextSize = fgGetInt("/sim/startup/xsize") / 60;
+    HUD_TextSize = 10;
+    HUDtext = new fntRenderer();
+    HUDtext -> setFont      ( guiFntHandle ) ;
+    HUDtext -> setPointSize ( HUD_TextSize ) ;
+    HUD_TextList.setFont( HUDtext );
     
-    HIptr = (instr_item *) new lon_label(((cen_x+compass_w/2)+(2*cen_x))/2,
-                                          max_y,
-                                          1, text_h,
-                                          get_longitude,
-                                          "%s%",//"%.0f",
-                                          "", //"Lon ", 
-                                          "",
-                                          1.0,
-                                          HUDS_TOP,
-                                          CENTER_JUST,
-                                          font_size,
-                                          0,
-                                          TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-#endif
-// $$$ end - added VS Renganthan 19 Oct 2K
-/*
-//      case 10:    // Digital KIAS
-        HIptr = (instr_item *) new instr_label ( 110,
-                                                 150,
-                                                  40,
-                                                  30,
-                                                 get_speed,
-                                                 "%5.0f",
-                                                 NULL,
-                                                 " Kts",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 RIGHT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 11:    // Digital Rate of Climb
-        HIptr = (instr_item *) new instr_label ( 110,
-                                                 135,
-                                                  40,
-                                                  10,
-                                                 get_climb_rate,
-                                                 "%5.0f",
-                                                 " Climb",
-                                                 NULL,
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 RIGHT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 12:    // Roll indication diagnostic
-        HIptr = (instr_item *) new instr_label ( 110,
-                                                 120,
-                                                  40,
-                                                  10,
-                                                 get_roll,
-                                                 "%5.2f",
-                                                 " Roll",
-                                                 " Deg",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 RIGHT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 13:    // Angle of attack diagnostic
-        HIptr = (instr_item *) new instr_label ( 440,
-                                                 150,
-                                                  60,
-                                                  10,
-                                                 get_aoa,
-                                                 "      %5.2f",
-                                                 "AOA",
-                                                 " Deg",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 RIGHT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 14:
-        HIptr = (instr_item *) new instr_label ( 440,
-                                                 135,
-                                                  60,
-                                                  10,
-                                                 get_heading,
-                                                 " %5.1f",
-                                                 "Heading ",
-                                                 " Deg",
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 RIGHT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 15:
-        HIptr = (instr_item *) new instr_label ( 440,
-                                                 120,
-                                                  60,
-                                                  10,
-                                                 get_sideslip,
-                                                 "%5.2f",
-                                                 "Sideslip ",
-                                                 NULL,
-                                                 1.0,
-                                                 HUDS_TOP,
-                                                 RIGHT_JUST,
-                                                 font_size,
-                                                 0,
-                                                 TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 16:
-        HIptr = (instr_item *) new instr_label( 440,
-                                                100,
-                                                 60,
-                                                 10,
-                                                get_throttleval,
-                                                "%5.2f",
-                                                "Throttle ",
-                                                NULL,
-                                                 1.0,
-                                                HUDS_TOP,
-                                                RIGHT_JUST,
-                                                font_size,
-                                                0,
-                                                TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 17:
-        HIptr = (instr_item *) new instr_label( 440,
-                                                 85,
-                                                 60,
-                                                 10,
-                                                get_elevatorval,
-                                                "%5.2f",
-                                                "Elevator ",
-                                                NULL,
-                                                 1.0,
-                                                HUDS_TOP,
-                                                RIGHT_JUST,
-                                                font_size,
-                                                0,
-                                                TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 18:
-        HIptr = (instr_item *) new instr_label( 440,
-                                                 60,
-                                                 60,
-                                                 10,
-                                                get_aileronval,
-                                                "%5.2f",
-                                                "Aileron  ",
-                                                NULL,
-                                                 1.0,
-                                                HUDS_TOP,
-                                                RIGHT_JUST,
-                                                font_size,
-                                                0,
-                                                TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 19:
-        HIptr = (instr_item *) new instr_label( 10,
-                                                10,
-                                                60,
-                                                10,
-                                                 get_frame_rate,
-                                                "%.1f",
-                                                "Frame rate = ",
-                                                NULL,
-                                                 1.0,
-                                                HUDS_TOP,
-                                                RIGHT_JUST,
-                                                font_size,
-                                                0,
-                                                TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-
-//      case 20:
-      switch( globals->get_options()->get_tris_or_culled() ) {
-      case 0:
-          HIptr = (instr_item *) new instr_label( 10,
-                              25,
-                              120,
-                              10,
-                              get_vfc_tris_drawn,
-                              "%.0f",
-                              "Tris Rendered = ",
-                              NULL,
-                              1.0,
-                              HUDS_TOP,
-                              RIGHT_JUST,
-                              font_size,
-                              0,
-                              TRUE );
-          break;
-      case 1:
-          HIptr = (instr_item *) new instr_label( 10,
-                              25,
-                              90,
-                              10,
-                              get_vfc_ratio,
-                              "%.2f",
-                              "VFC Ratio = ",
-                              NULL,
-                              1.0,
-                              HUDS_TOP,
-                              RIGHT_JUST,
-                              font_size,
-                              0,
-                              TRUE );
-          break;
-      }
-      break;
-
-//      case 21:
-        HIptr = (instr_item *) new instr_label( 10,
-                                                40,
-                                                90,
-                                                10,
-                                                get_fov,
-                                                "%.1f",
-                                                "FOV = ",
-                                                NULL,
-                        1.0,
-                                                HUDS_TOP,
-                                                RIGHT_JUST,
-                                                font_size,
-                                                0,
-                                                TRUE );
-  HUD_deque.insert( HUD_deque.begin(), HIptr);
-*/
-//      default:
-//        HIptr = 0;;
-//      }
-//    if( HIptr ) {                   // Anything to install?
-//      HUD_deque.insert( HUD_deque.begin(), HIptr);
-//      }
-//    index++;
-//    }
-//  while( HIptr );
-
-  fgHUDalphaInit();
-  fgHUDReshape();
-   return 0;  // For now. Later we may use this for an error code.
+    return 0;  // For now. Later we may use this for an error code.
 
 }
 
 int fgHUDInit2( fgAIRCRAFT * /* current_aircraft */ )
 {
-//    instr_item *HIptr;
-//    int index;
-
-    int off = 50;
-//  int min_x = off;
-//  int max_x = 640-off;
-//  int min_y = off;
-    int max_y = 480-off;
-    int cen_x = 640 / 2;
-    int cen_y = 480 / 2;
-    int text_h = 10;
-    int ladr_w2 = 60;
-    int ladr_h2 = 90;
-//  int ladr_t = 35;
-    int compass_w = 200;
-//  int gap = 10;
-
-//	int font_size = globals->get_options()->get_xsize() / 60;
-    int font_size = (globals->get_options()->get_xsize() > 1000) ? LARGE : SMALL;
 
     HUD_style = 2;
 
-    FG_LOG( FG_COCKPIT, FG_INFO, "Initializing current aircraft HUD" );
-
-//  deque < instr_item * > :: iterator first = HUD_deque.begin();
-//  deque < instr_item * > :: iterator last = HUD_deque.end();
-//  HUD_deque.erase( first, last);  // empty the HUD deque  
-    HUD_deque.erase( HUD_deque.begin(), HUD_deque.end());
-
-    //  hud->code = 1;
-    //  hud->status = 0;
-
-    // For now lets just hardcode the hud here.
-    // In the future, hud information has to come from the same place
-    // aircraft information came from.
-
-    //  fgHUDSetTimeMode( hud, NIGHT );
-    //  fgHUDSetBrightness( hud, BRT_LIGHT );
-
-    //  index = 0;
-//    index = 19;  
-
-    instr_item* p;
-
-    p = new HudLadder( cen_x-ladr_w2, cen_y-ladr_h2, 2*ladr_w2, 2*ladr_h2, 1 );
-    HUD_deque.push_front( p );
-
-//      case 4:    // GYRO COMPASS
-    p =new hud_card( cen_x-(compass_w/2),
-                     max_y,
-                     compass_w,
-                     28,
-                     get_view_direction,
-                     HUDS_TOP,
-                     360, 0,
-                     1.0,
-                     5,   1,
-                     360,
-                     0,
-                     25,
-                     true);
-    HUD_deque.push_front( p );
-
-    p = new lat_label( (cen_x - compass_w/2)/2,
-                       max_y,
-                       0, text_h,
-                       get_latitude,
-                       "%s%", //"%.0f",
-                       "", //"Lat ",
-                       "",
-                       1.0,
-                       HUDS_TOP,
-                       CENTER_JUST,
-                       font_size,
-                       0,
-                       TRUE );
-    HUD_deque.push_front( p );
-    
-//    p = new instr_label( 140, 450, 60, 10,
-//           get_lat_min,
-//           "%05.2f",
-//           "",
-//           NULL,
-//           1.0,
-//           HUDS_TOP,
-//           CENTER_JUST,
-//           font_size,
-//           0,
-//           TRUE );
-//    HUD_deque.push_front( p );
-    
-    p = new lon_label(((cen_x+compass_w/2)+(2*cen_x))/2,
-                       max_y,
-                       1, text_h,
-                       get_longitude,
-                       "%s%",//"%.0f",
-                       "", //"Lon ",
-                       "",
-                       1.0,
-                       HUDS_TOP,
-                       CENTER_JUST,
-                       font_size,
-                       0,
-                       TRUE );
-    HUD_deque.push_front( p );
-    
-    int x_pos = 40;
-    
-    p = new instr_label( x_pos, 25, 60, 10,
-                         get_frame_rate,
-                         "%7.1f",
-                         "Frame rate =",
-                         NULL,
-                         1.0,
-                         HUDS_TOP,
-                         LEFT_JUST,
-                         font_size,
-                         0, 
-                         TRUE );
-    HUD_deque.push_front( p );
-#if 0
-    p = new instr_label( x_pos, 40, 120, 10,
-                         get_vfc_tris_culled,
-                         "%7.0f",
-                         "Culled       =",
-                         NULL,
-                         1.0,
-                         HUDS_TOP,
-                         LEFT_JUST,
-                         font_size,
-                         0,
-                         TRUE );
-    HUD_deque.push_front( p );
-
-    p = new instr_label( x_pos, 55, 120, 10,
-                         get_vfc_tris_drawn,
-                         "%7.0f",
-                         "Rendered   =",
-                         NULL,
-                         1.0,
-                         HUDS_TOP,
-                         LEFT_JUST,
-                         font_size,
-                         0,
-                         TRUE );
-    HUD_deque.push_front( p );
-#endif // 0
-	
-//    p = new instr_label( x_pos, 70, 90, 10,
-    p = new instr_label( x_pos, 40, 90, 10,
-                         get_fov,
-                         "%7.1f",
-                         "FOV          = ",
-                         NULL,
-                         1.0,
-                         HUDS_TOP,
-                         LEFT_JUST,
-                         font_size,
-                         0,
-                         TRUE );
-    HUD_deque.push_front( p );
-
-    x_pos = 480;
-    
-    p = new instr_label ( x_pos,
-                          70,
-                          60,
-                          10,
-                          get_aoa,
-                          "%7.2f",
-                          "AOA      ",
-                          " Deg",
-                          1.0,
-                          HUDS_TOP,
-                          LEFT_JUST,
-                          font_size,
-                          0,
-                          TRUE );
-    HUD_deque.push_front( p );
-
-    p = new instr_label( x_pos, 55, 40, 30,
-                         get_speed,
-                         "%5.0f",
-                         "Airspeed ",
-                         " Kts",
-                         1.0,
-                         HUDS_TOP,
-                         LEFT_JUST,
-                         font_size,
-                         0,
-                         TRUE );
-    HUD_deque.push_front( p );
-
-    if ( globals->get_options()->get_units() == FGOptions::FG_UNITS_FEET ) {
-    strcpy(units, " ft");
+    SG_LOG( SG_COCKPIT, SG_INFO, "Initializing current aircraft HUD" );
+
+    SGPath path(globals->get_fg_root());
+    path.append("Huds/Minimal/default.xml");
+
+
+    ifstream input(path.c_str());
+    if (!input.good()) {
+        SG_LOG(SG_INPUT, SG_ALERT,
+               "Cannot read Hud configuration from " << path.str());
     } else {
-    strcpy(units, " m");
+        readHud(input);
+        input.close();
     }
-    p = new instr_label( x_pos, 40, 40, 10,
-             get_altitude,
-             "%5.0f",
-             "Altitude ",
-             units,
-             1.0,
-             HUDS_TOP,
-             LEFT_JUST,
-             font_size,
-             0,
-             TRUE );
-    HUD_deque.push_front( p );
-
-    p = new instr_label( x_pos, 25, 40, 10,
-             get_agl,
-             "%5.0f",
-             "Elvation ",
-             units,
-             1.0,
-             HUDS_TOP,
-             LEFT_JUST,
-             font_size,
-             0,
-             TRUE );
-    HUD_deque.push_front( p );
-
-    p = new instr_label( x_pos, 10, 60, 10,
-             get_heading,
-             "%5.1f",
-             "Heading  ",
-             " Deg",
-             1.0,
-             HUDS_TOP,
-             LEFT_JUST,
-             font_size,
-             0,
-             TRUE );
-    HUD_deque.push_front( p );
-
-    p = new fgTBI_instr( 290, 55, 60, 10 ); // 270
-    HUD_deque.push_front( p );
-    
-    p = new  guage_instr( 270, //250,            // x
-                          390, //360, //400, //45, //420,            // y
-                          100,            // width
-                          20,            // height
-                          get_aileronval, // data source
-                          HUDS_BOTTOM | HUDS_NOTEXT,
-                          100.0,
-                          +1.0,
-                          -1.0);
-    HUD_deque.push_front( p );
-
-    p = new  guage_instr( 20,             // x
-                          240-50,             // y
-                          20,             // width
-                          100,             // height
-                          get_elevatorval, // data source
-                          HUDS_RIGHT | HUDS_VERT | HUDS_NOTEXT,
-                          -100.0,           // Scale data
-                          +1.0,           // Data Range
-                          -1.0);
-    HUD_deque.push_front( p );
-
-    p = new  guage_instr( 270, //250,             // x
-                          10+15,             // y
-                          100,             // width
-                          20,             // height
-                          get_rudderval,   // data source
-                          HUDS_TOP | HUDS_NOTEXT,
-                          100.0,
-                          +1.0,
-                          -1.0);
-    HUD_deque.push_front( p );
-
-    p = new  guage_instr( 600,             // x
-                          240-80,
-                          20,
-                          160,             // height
-                          get_throttleval, // data source
-                          HUDS_VERT | HUDS_LEFT | HUDS_NOTEXT,
-                          100.0,
-                          1.0,
-                          0.0);
-    HUD_deque.push_front( p );
-    
+
     return 0;  // For now. Later we may use this for an error code.
+
 }
+//$$$ End - added, Neetha, 28 Nov 2k  
 
-int global_day_night_switch = DAY;
+static int global_day_night_switch = HUD_DAY;
 
 void HUD_masterswitch( bool incr )
 {
-    if ( globals->get_options()->get_hud_status() ) {
-	if ( global_day_night_switch == DAY ) {
-	    global_day_night_switch = NIGHT;
+    if ( fgGetBool("/sim/hud/visibility") ) {
+	if ( global_day_night_switch == HUD_DAY ) {
+	    global_day_night_switch = HUD_NIGHT;
 	} else {
-	    globals->get_options()->set_hud_status( false );
+	    fgSetBool("/sim/hud/visibility", false);
 	}
     } else {
-	globals->get_options()->set_hud_status( true );
-	global_day_night_switch = DAY;
+        fgSetBool("/sim/hud/visibility", true);
+	global_day_night_switch = HUD_DAY;
     }	
 }
 
@@ -1381,54 +824,54 @@ void HUD_brightkey( bool incr_bright )
     instr_item *pHUDInstr = HUD_deque[0];
     int brightness        = pHUDInstr->get_brightness();
 
-    if( globals->get_options()->get_hud_status() ) {
+    if( fgGetBool("/sim/hud/visibility") ) {
 	if( incr_bright ) {
 	    switch (brightness)
 		{
-		case BRT_LIGHT:
-		    brightness = BRT_BLACK;
+		case HUD_BRT_LIGHT:
+		    brightness = HUD_BRT_BLACK;
 		    break;
 
-		case BRT_MEDIUM:
-		    brightness = BRT_LIGHT;
+		case HUD_BRT_MEDIUM:
+		    brightness = HUD_BRT_LIGHT;
 		    break;
 
-		case BRT_DARK:
-		    brightness = BRT_MEDIUM;
+		case HUD_BRT_DARK:
+		    brightness = HUD_BRT_MEDIUM;
 		    break;
 
-		case BRT_BLACK:
-		    brightness = BRT_DARK;
+		case HUD_BRT_BLACK:
+		    brightness = HUD_BRT_DARK;
 		    break;
 
 		default:
-		    brightness = BRT_BLACK;
+		    brightness = HUD_BRT_BLACK;
 		}
 	} else {
 	    switch (brightness)
 		{
-		case BRT_LIGHT:
-		    brightness = BRT_MEDIUM;
+		case HUD_BRT_LIGHT:
+		    brightness = HUD_BRT_MEDIUM;
 		    break;
 
-		case BRT_MEDIUM:
-		    brightness = BRT_DARK;
+		case HUD_BRT_MEDIUM:
+		    brightness = HUD_BRT_DARK;
 		    break;
 
-		case BRT_DARK:
-		    brightness = BRT_BLACK;
+		case HUD_BRT_DARK:
+		    brightness = HUD_BRT_BLACK;
 		    break;
 
-		case BRT_BLACK:
-		    brightness = BRT_LIGHT;
+		case HUD_BRT_BLACK:
+		    brightness = HUD_BRT_LIGHT;
 		    break;
 
 		default:
-		    globals->get_options()->set_hud_status(0);
+		    fgSetBool("/sim/hud/visibility", false);
 		}
 	}
     } else {
-	globals->get_options()->set_hud_status(true);
+	fgSetBool("/sim/hud/visibility", true);
     }
 
     pHUDInstr->SetBrightness( brightness );
@@ -1445,131 +888,141 @@ static puSlider    *HUDalphaHS0;
 static char         SliderText[2][ 8 ];
 
 static void alpha_adj( puObject *hs ) {
-	float val ;
-
-	hs-> getValue ( &val ) ;
-	fgAP_CLAMP ( val, 0.1, 1.0 ) ;
-	//    printf ( "maxroll_adj( %p ) %f %f\n", hs, val, MaxRollAdjust * val ) ;
-	hud_trans_alpha = val;
-	sprintf( SliderText[ 0 ], "%05.2f", hud_trans_alpha );
-	HUDalphaText -> setLabel ( SliderText[ 0 ] ) ;
+    float val ;
+
+    hs-> getValue ( &val ) ;
+    fgAP_CLAMP ( val, 0.1, 1.0 ) ;
+    // printf ( "maxroll_adj( %p ) %f %f\n", hs, val, MaxRollAdjust * val ) ;
+    hud_trans_alpha = val;
+    sprintf( SliderText[ 0 ], "%05.2f", hud_trans_alpha );
+    HUDalphaText -> setLabel ( SliderText[ 0 ] ) ;
 }
 
 void fgHUDalphaAdjust( puObject * ) {
-	globals->get_options()->set_anti_alias_hud(1);
-	FG_PUSH_PUI_DIALOG( HUDalphaDialog );
+    fgSetBool("/sim/hud/antialiased", true);
+    FG_PUSH_PUI_DIALOG( HUDalphaDialog );
 }
 
 static void goAwayHUDalphaAdjust (puObject *)
 {
-	FG_POP_PUI_DIALOG( HUDalphaDialog );
+    FG_POP_PUI_DIALOG( HUDalphaDialog );
 }
 
 static void cancelHUDalphaAdjust (puObject *)
 {
-	globals->get_options()->set_anti_alias_hud(0);
-	FG_POP_PUI_DIALOG( HUDalphaDialog );
+    fgSetBool("/sim/hud/antialiased", false);
+    FG_POP_PUI_DIALOG( HUDalphaDialog );
 }
 
 // Done once at system initialization
 void fgHUDalphaInit( void ) {
 
-	//	printf("fgHUDalphaInit\n");
+    //	printf("fgHUDalphaInit\n");
 #define HORIZONTAL  FALSE
 
-	int DialogX = 40;
-	int DialogY = 100;
-	int DialogWidth = 240;
+    int DialogX = 40;
+    int DialogY = 100;
+    int DialogWidth = 240;
 
-	char Label[] =  "HUD Adjuster";
-	char *s;
+    char Label[] =  "HUD Adjuster";
+    char *s;
 
-	int labelX = (DialogWidth / 2) -
-				 (puGetStringWidth( puGetDefaultLabelFont(), Label ) / 2);
+    int labelX = (DialogWidth / 2) -
+        ( puGetDefaultLabelFont().getStringWidth( Label ) / 2);
 	
-	int nSliders = 1;
-	int slider_x = 10;
-	int slider_y = 55;
-	int slider_width = 220;
-	int slider_title_x = 15;
-	int slider_value_x = 160;
-	float slider_delta = 0.05f;
-
-	puFont HUDalphaLegendFont;
-	puFont HUDalphaLabelFont;
-	puGetDefaultFonts ( &HUDalphaLegendFont, &HUDalphaLabelFont );
+    int nSliders = 1;
+    int slider_x = 10;
+    int slider_y = 55;
+    int slider_width = 220;
+    int slider_title_x = 15;
+    int slider_value_x = 160;
+    float slider_delta = 0.05f;
+
+    puFont HUDalphaLegendFont;
+    puFont HUDalphaLabelFont;
+    puGetDefaultFonts ( &HUDalphaLegendFont, &HUDalphaLabelFont );
 	
-	HUDalphaDialog = new puDialogBox ( DialogX, DialogY ); {
-		int horiz_slider_height = puGetStringHeight (HUDalphaLabelFont) +
-								  puGetStringDescender (HUDalphaLabelFont) +
-								  PUSTR_TGAP + PUSTR_BGAP + 5;
-
-		puFrame *
-		HUDalphaFrame = new puFrame ( 0, 0,
-									  DialogWidth,
-									  85 + nSliders * horiz_slider_height );
+    HUDalphaDialog = new puDialogBox ( DialogX, DialogY ); {
+        int horiz_slider_height = HUDalphaLabelFont.getStringHeight() +
+            HUDalphaLabelFont.getStringDescender() +
+            PUSTR_TGAP + PUSTR_BGAP + 5;
+
+        /* puFrame *
+           HUDalphaFrame = new puFrame ( 0, 0, DialogWidth,
+           85 + nSliders
+           * horiz_slider_height ); */
+
+        puText *
+            HUDalphaDialogMessage = new puText ( labelX,
+                                                 52 + nSliders
+                                                 * horiz_slider_height );
+        HUDalphaDialogMessage -> setDefaultValue ( Label );
+        HUDalphaDialogMessage -> getDefaultValue ( &s );
+        HUDalphaDialogMessage -> setLabel        ( s );
+
+        HUDalphaHS0 = new puSlider ( slider_x, slider_y,
+                                     slider_width, HORIZONTAL ) ;
+        HUDalphaHS0->     setDelta ( slider_delta ) ;
+        HUDalphaHS0->     setValue ( hud_trans_alpha ) ;
+        HUDalphaHS0->    setCBMode ( PUSLIDER_DELTA ) ;
+        HUDalphaHS0->  setCallback ( alpha_adj ) ;
+
+        puText *
+            HUDalphaTitle =      new puText ( slider_title_x, slider_y ) ;
+        HUDalphaTitle-> setDefaultValue ( "Alpha" ) ;
+        HUDalphaTitle-> getDefaultValue ( &s ) ;
+        HUDalphaTitle->        setLabel ( s ) ;
 		
-		puText *
-		HUDalphaDialogMessage = new puText ( labelX,
-											 52 + nSliders
-											 * horiz_slider_height );
-		HUDalphaDialogMessage -> setDefaultValue ( Label );
-		HUDalphaDialogMessage -> getDefaultValue ( &s );
-		HUDalphaDialogMessage -> setLabel        ( s );
-
-		HUDalphaHS0 = new puSlider ( slider_x, slider_y,
-									 slider_width, HORIZONTAL ) ;
-		HUDalphaHS0->     setDelta ( slider_delta ) ;
-		HUDalphaHS0->     setValue ( hud_trans_alpha ) ;
-		HUDalphaHS0->    setCBMode ( PUSLIDER_DELTA ) ;
-		HUDalphaHS0->  setCallback ( alpha_adj ) ;
-
-		puText *
-		HUDalphaTitle =      new puText ( slider_title_x, slider_y ) ;
-		HUDalphaTitle-> setDefaultValue ( "Alpha" ) ;
-		HUDalphaTitle-> getDefaultValue ( &s ) ;
-		HUDalphaTitle->        setLabel ( s ) ;
-		
-		HUDalphaText = new puText ( slider_value_x, slider_y ) ;
-		sprintf( SliderText[ 0 ], "%05.2f", hud_trans_alpha );
-		HUDalphaText-> setLabel ( SliderText[ 0 ] ) ;
-
-
-		puOneShot *
-		HUDalphaOkButton =     new puOneShot ( 10, 10, 60, 45 );
-		HUDalphaOkButton->         setLegend ( gui_msg_OK );
-		HUDalphaOkButton-> makeReturnDefault ( TRUE );
-		HUDalphaOkButton->       setCallback ( goAwayHUDalphaAdjust );
-		
-		puOneShot *
-		HUDalphaNoButton = new puOneShot ( 160, 10, 230, 45 );
-		HUDalphaNoButton->     setLegend ( gui_msg_CANCEL );
-		HUDalphaNoButton->   setCallback ( cancelHUDalphaAdjust );
-	}
-	FG_FINALIZE_PUI_DIALOG( HUDalphaDialog );
+        HUDalphaText = new puText ( slider_value_x, slider_y ) ;
+        sprintf( SliderText[ 0 ], "%05.2f", hud_trans_alpha );
+        HUDalphaText-> setLabel ( SliderText[ 0 ] ) ;
+
+        puOneShot *
+            HUDalphaOkButton =     new puOneShot ( 10, 10, 60, 45 );
+        HUDalphaOkButton->         setLegend ( gui_msg_OK );
+        HUDalphaOkButton-> makeReturnDefault ( TRUE );
+        HUDalphaOkButton->       setCallback ( goAwayHUDalphaAdjust );
+
+        puOneShot *
+            HUDalphaNoButton = new puOneShot ( 160, 10, 230, 45 );
+        HUDalphaNoButton->     setLegend ( gui_msg_CANCEL );
+        HUDalphaNoButton->   setCallback ( cancelHUDalphaAdjust );
+    }
+    FG_FINALIZE_PUI_DIALOG( HUDalphaDialog );
 
 #undef HORIZONTAL
 }
 
+
 void fgHUDReshape(void) {
-	if ( HUDtext )
-		delete HUDtext;
-
-	HUD_TextSize = globals->get_options()->get_xsize() / 60;
-        HUD_TextSize = 10;
-	HUDtext = new fntRenderer();
-	HUDtext -> setFont      ( guiFntHandle ) ;
-	HUDtext -> setPointSize ( HUD_TextSize ) ;
-	HUD_TextList.setFont( HUDtext );
+#if 0
+    if ( HUDtext ) {
+        // this chunk of code is not necessarily thread safe if the
+        // compiler optimizer reorders these statements.  Note that
+        // "delete ptr" does not set "ptr = NULL".  We have to do that
+        // ourselves.
+        fntRenderer *tmp = HUDtext;
+        HUDtext = NULL;
+        delete tmp;
+    }
+
+    HUD_TextSize = fgGetInt("/sim/startup/xsize") / 60;
+    HUD_TextSize = 10;
+    HUDtext = new fntRenderer();
+    HUDtext -> setFont      ( guiFntHandle ) ;
+    HUDtext -> setPointSize ( HUD_TextSize ) ;
+    HUD_TextList.setFont( HUDtext );
+#endif
 }
 
 
 static void set_hud_color(float r, float g, float b) {
-	globals->get_options()->get_anti_alias_hud() ?
-			glColor4f(r,g,b,hud_trans_alpha) :
-			glColor3f(r,g,b);
+    fgGetBool("/sim/hud/antialiased") ?
+        glColor4f(r,g,b,hud_trans_alpha) :
+        glColor3f(r,g,b);
 }
 
+
 // fgUpdateHUD
 //
 // Performs a once around the list of calls to instruments installed in
@@ -1577,184 +1030,257 @@ static void set_hud_color(float r, float g, float b) {
 // all C++.
 //
 void fgUpdateHUD( void ) {
-  int brightness;
-//  int day_night_sw = current_aircraft.controls->day_night_switch;
-  int day_night_sw = global_day_night_switch;
-  int hud_displays = HUD_deque.size();
-  instr_item *pHUDInstr;
-  float line_width;
-
-  if( !hud_displays ) {  // Trust everyone, but ALWAYS cut the cards!
-    return;
+	
+    static const SGPropertyNode *enable3d_node = fgGetNode("/sim/hud/enable3d");
+    if( HUD_style == 1 && enable3d_node->getBoolValue() )
+    {
+        fgUpdateHUDVirtual();
+        return;
+    }
+    
+    static const float normal_aspect = float(640) / float(480);
+    // note: aspect_ratio is Y/X
+    float current_aspect = 1.0f/globals->get_current_view()->get_aspect_ratio();
+    if( current_aspect > normal_aspect ) {
+        float aspect_adjust = current_aspect / normal_aspect;
+        float adjust = 320.0f*aspect_adjust - 320.0f;
+        fgUpdateHUD( -adjust, 0.0f, 640.0f+adjust, 480.0f );
+    } else {
+        float aspect_adjust = normal_aspect / current_aspect;
+        float adjust = 240.0f*aspect_adjust - 240.0f;
+        fgUpdateHUD( 0.0f, -adjust, 640.0f, 480.0f+adjust );
     }
+}
 
-  HUD_TextList.erase();
-  HUD_LineList.erase();
-//  HUD_StippleLineList.erase();
+void fgUpdateHUDVirtual()
+{
+    FGViewer* view = globals->get_current_view();
+
+    // Standard fgfs projection, with essentially meaningless clip
+    // planes (we'll map the whole HUD plane to z=-1)
+    glMatrixMode(GL_PROJECTION);
+    glPushMatrix();
+    glLoadIdentity();
+    gluPerspective(view->get_v_fov(), 1/view->get_aspect_ratio(), 0.1, 10);
+
+    glMatrixMode(GL_MODELVIEW);
+    glPushMatrix();
+    glLoadIdentity();
   
-  pHUDInstr = HUD_deque[0];
-  brightness = pHUDInstr->get_brightness();
-//  brightness = HUD_deque.at(0)->get_brightness();
-
-  glMatrixMode(GL_PROJECTION);
-  glPushMatrix();
-
-  glLoadIdentity();
-  gluOrtho2D(0, 640, 0, 480);
-  glMatrixMode(GL_MODELVIEW);
-  glPushMatrix();
-  glLoadIdentity();
-
-  glDisable(GL_DEPTH_TEST);
-  glDisable(GL_LIGHTING);
-
-  if( globals->get_options()->get_anti_alias_hud() ) {
-	  glEnable(GL_LINE_SMOOTH);
-//	  glEnable(GL_BLEND);
-	  glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
-	  glHint(GL_LINE_SMOOTH_HINT,GL_DONT_CARE);
-	  glLineWidth(1.5);
-  } else {
-	  glLineWidth(1.0);
-  }
-
-  if( day_night_sw == DAY) {
-      switch (brightness)
-	  {
-	  case BRT_LIGHT:
-	      set_hud_color (0.1f, 0.9f, 0.1f);
-	      break;
-
-          case BRT_MEDIUM:
-	      set_hud_color (0.1f, 0.7f, 0.0f);
-	      break;
-
-          case BRT_DARK:
-	      set_hud_color (0.0f, 0.6f, 0.0f);
-	      break;
-
-          case BRT_BLACK:
-	      set_hud_color( 0.0f, 0.0f, 0.0f);
-	      break;
-
-          default:
-	      set_hud_color (0.1f, 0.9f, 0.1f);
-	  }
-  } else {
-      if( day_night_sw == NIGHT) {
-	  switch (brightness)
-	      {
-	      case BRT_LIGHT:
-		  set_hud_color (0.9f, 0.1f, 0.1f);
-		  break;
-
-              case BRT_MEDIUM:
-		  set_hud_color (0.7f, 0.0f, 0.1f);
-		  break;
-
-	      case BRT_DARK:
-		  set_hud_color (0.6f, 0.0f, 0.0f);
-		  break;
-
-	      case BRT_BLACK:
-		  set_hud_color( 0.0f, 0.0f, 0.0f);
-		  break;
-
-	      default:
-		  set_hud_color (0.6f, 0.0f, 0.0f);
-	      }
-      } else {     // Just in case default
-	  set_hud_color (0.1f, 0.9f, 0.1f);
-      }
-  }
-
-  deque < instr_item * > :: iterator current = HUD_deque.begin();
-  deque < instr_item * > :: iterator last = HUD_deque.end();
-
-  for ( ; current != last; ++current ) {
-	  pHUDInstr = *current;
-
-	  if( pHUDInstr->enabled()) {
-		  //  fgPrintf( FG_COCKPIT, FG_DEBUG, "HUD Code %d  Status %d\n",
-		  //            hud->code, hud->status );
-		  pHUDInstr->draw();
-	  }
-  }
-
-  char *gmt_str = get_formated_gmt_time();
-  HUD_TextList.add( fgText(40, 10, gmt_str) );
-
-#ifdef FG_NETWORK_OLK
-  if ( net_hud_display ) {
-      net_hud_update();
-  }
-#endif
+    // Standard fgfs view direction computation
+    float lookat[3];
+    lookat[0] = -sin(SG_DEGREES_TO_RADIANS * view->getHeadingOffset_deg());
+    lookat[1] = tan(SG_DEGREES_TO_RADIANS * view->getPitchOffset_deg());
+    lookat[2] = -cos(SG_DEGREES_TO_RADIANS * view->getHeadingOffset_deg());
+    if(fabs(lookat[1]) > 9999) lookat[1] = 9999; // FPU sanity
+    gluLookAt(0, 0, 0, lookat[0], lookat[1], lookat[2], 0, 1, 0);
+
+    // Map the -1:1 square to a 55.0x41.25 degree wide patch at z=1.
+    // This is the default fgfs field of view, which the HUD files are
+    // written to assume.
+    float dx = 0.52056705; // tan(55/2)
+    float dy = dx * 0.75;  // assumes 4:3 aspect ratio
+    float m[16];
+    m[0] = dx; m[4] =  0; m[ 8] = 0; m[12] = 0;
+    m[1] =  0; m[5] = dy; m[ 9] = 0; m[13] = 0;
+    m[2] =  0; m[6] =  0; m[10] = 1; m[14] = 0;
+    m[3] =  0; m[7] =  0; m[11] = 0; m[15] = 1;
+    glMultMatrixf(m);
+
+    // Convert the 640x480 "HUD standard" coordinate space to a square
+    // about the origin in the range [-1:1] at depth of -1
+    glScalef(1./320, 1./240, 1);
+    glTranslatef(-320, -240, -1);
+
+    // Do the deed
+    drawHUD();
+
+    // Clean up our mess
+    glMatrixMode(GL_PROJECTION);
+    glPopMatrix();
+    glMatrixMode(GL_MODELVIEW);
+    glPopMatrix();
+}
+
+void fgUpdateHUD( GLfloat x_start, GLfloat y_start,
+                  GLfloat x_end, GLfloat y_end )
+{
+    glMatrixMode(GL_PROJECTION);
+    glPushMatrix();
+    glLoadIdentity();
+    gluOrtho2D(x_start, x_end, y_start, y_end);
 
+    glMatrixMode(GL_MODELVIEW);
+    glPushMatrix();
+    glLoadIdentity();
 
-  // temporary
-  // extern bool fgAPAltitudeEnabled( void );
-  // extern bool fgAPHeadingEnabled( void );
-  // extern bool fgAPWayPointEnabled( void );
-  // extern char *fgAPget_TargetDistanceStr( void );
-  // extern char *fgAPget_TargetHeadingStr( void );
-  // extern char *fgAPget_TargetAltitudeStr( void );
-  // extern char *fgAPget_TargetLatLonStr( void );
-
-  int apY = 480 - 80;
-//  char scratch[128];
-//  HUD_TextList.add( fgText( "AUTOPILOT", 20, apY) );
-//  apY -= 15;
-  if( current_autopilot->get_HeadingEnabled() ) {
-      HUD_TextList.add( fgText( 40, apY, 
-				current_autopilot->get_TargetHeadingStr()) );
-      apY -= 15;
-  }
-  if( current_autopilot->get_AltitudeEnabled() ) {
-      HUD_TextList.add( fgText( 40, apY, 
-				current_autopilot->get_TargetAltitudeStr()) );
-      apY -= 15;
-  }
-  if( current_autopilot->get_HeadingMode() == 
-      FGAutopilot::FG_HEADING_WAYPOINT )
-  {
-      char *wpstr;
-      wpstr = current_autopilot->get_TargetWP1Str();
-      if ( strlen( wpstr ) ) {
-	  HUD_TextList.add( fgText( 40, apY, wpstr ) );
-	  apY -= 15;
-      }
-      wpstr = current_autopilot->get_TargetWP2Str();
-      if ( strlen( wpstr ) ) {
-	  HUD_TextList.add( fgText( 40, apY, wpstr ) );
-	  apY -= 15;
-      }
-      wpstr = current_autopilot->get_TargetWP3Str();
-      if ( strlen( wpstr ) ) {
-	  HUD_TextList.add( fgText( 40, apY, wpstr ) );
-	  apY -= 15;
-      }
-  }
+    drawHUD();
+
+    glMatrixMode(GL_PROJECTION);
+    glPopMatrix();
+    glMatrixMode(GL_MODELVIEW);
+    glPopMatrix();
+}
+
+void drawHUD()
+{
+    if( !HUD_deque.size() ) {  // Trust everyone, but ALWAYS cut the cards!
+        return;
+    }
+
+    HUD_TextList.erase();
+    HUD_LineList.erase();
+    // HUD_StippleLineList.erase();
   
-  HUD_TextList.draw();
-
-  HUD_LineList.draw();
-
-//  glEnable(GL_LINE_STIPPLE);
-//  glLineStipple( 1, 0x00FF );
-//  HUD_StippleLineList.draw();
-//  glDisable(GL_LINE_STIPPLE);
-
-  if( globals->get_options()->get_anti_alias_hud() ) {
-//	  glDisable(GL_BLEND);
-	  glDisable(GL_LINE_SMOOTH);
-	  glLineWidth(1.0);
-  }
-
-  glEnable(GL_DEPTH_TEST);
-  glEnable(GL_LIGHTING);
-  glMatrixMode(GL_PROJECTION);
-  glPopMatrix();
-  glMatrixMode(GL_MODELVIEW);
-  glPopMatrix();
+    glDisable(GL_DEPTH_TEST);
+    glDisable(GL_LIGHTING);
+
+    static const SGPropertyNode *antialiased_node
+        = fgGetNode("/sim/hud/antialiased", true);
+    static const SGPropertyNode *heading_enabled
+        = fgGetNode("/autopilot/locks/heading", true);
+    static const SGPropertyNode *altitude_enabled
+        = fgGetNode("/autopilot/locks/altitude", true);
+
+    static char hud_hdg_text[256];
+    static char hud_wp0_text[256];
+    static char hud_wp1_text[256];
+    static char hud_wp2_text[256];
+    static char hud_alt_text[256];
+
+    if( antialiased_node->getBoolValue() ) {
+        glEnable(GL_LINE_SMOOTH);
+        //	  glEnable(GL_BLEND);
+        glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
+        glHint(GL_LINE_SMOOTH_HINT,GL_DONT_CARE);
+        glLineWidth(2.0);
+    } else {
+        glLineWidth(1.0);
+    }
+
+    if( global_day_night_switch == HUD_DAY) {
+        switch (HUD_deque[0]->get_brightness())
+            {
+            case HUD_BRT_LIGHT:
+                set_hud_color (0.1f, 0.9f, 0.1f);
+                break;
+
+            case HUD_BRT_MEDIUM:
+                set_hud_color (0.1f, 0.7f, 0.0f);
+                break;
+
+            case HUD_BRT_DARK:
+                set_hud_color (0.0f, 0.6f, 0.0f);
+                break;
+
+            case HUD_BRT_BLACK:
+                set_hud_color( 0.0f, 0.0f, 0.0f);
+                break;
+
+            default:
+                set_hud_color (0.1f, 0.9f, 0.1f);
+            }
+    } else {
+        if( global_day_night_switch == HUD_NIGHT) {
+            switch (HUD_deque[0]->get_brightness())
+                {
+                case HUD_BRT_LIGHT:
+                    set_hud_color (0.9f, 0.1f, 0.1f);
+                    break;
+
+                case HUD_BRT_MEDIUM:
+                    set_hud_color (0.7f, 0.0f, 0.1f);
+                    break;
+
+                case HUD_BRT_DARK:
+                    set_hud_color (0.6f, 0.0f, 0.0f);
+                    break;
+
+                case HUD_BRT_BLACK:
+                    set_hud_color( 0.0f, 0.0f, 0.0f);
+                    break;
+
+                default:
+                    set_hud_color (0.6f, 0.0f, 0.0f);
+                }
+        } else {     // Just in case default
+            set_hud_color (0.1f, 0.9f, 0.1f);
+        }
+    }
+
+    for_each(HUD_deque.begin(), HUD_deque.end(), HUDdraw());
+
+    HUD_TextList.add( fgText(40, 10, get_formated_gmt_time(), 0) );
+
+
+    int apY = 480 - 80;
+    
+    
+    if (strcmp( heading_enabled->getStringValue(), "dg-heading-hold") == 0 ) {
+        snprintf( hud_hdg_text, 256, "hdg = %.1f\n",
+                  fgGetDouble("/autopilot/settings/heading-bug-deg") );
+        HUD_TextList.add( fgText( 40, apY, hud_hdg_text ) );
+        apY -= 15;
+    } else if ( strcmp(heading_enabled->getStringValue(), "true-heading-hold") == 0 ) {
+        snprintf( hud_hdg_text, 256, "hdg = %.1f\n",
+                  fgGetDouble("/autopilot/settings/true-heading-deg") );
+        HUD_TextList.add( fgText( 40, apY, hud_hdg_text ) );
+        apY -= 15;
+
+        string wp0_id = fgGetString( "/autopilot/route-manager/wp[0]/id" );
+        if ( wp0_id.length() > 0 ) {
+            snprintf( hud_wp0_text, 256, "%5s %6.1fnm %s", wp0_id.c_str(), 
+                      fgGetDouble( "/autopilot/route-manager/wp[0]/dist" ),
+                      fgGetString( "/autopilot/route-manager/wp[0]/eta" ) );
+            HUD_TextList.add( fgText( 40, apY, hud_wp0_text ) );
+            apY -= 15;
+        }
+        string wp1_id = fgGetString( "/autopilot/route-manager/wp[1]/id" );
+        if ( wp1_id.length() > 0 ) {
+            snprintf( hud_wp1_text, 256, "%5s %6.1fnm %s", wp1_id.c_str(), 
+                      fgGetDouble( "/autopilot/route-manager/wp[1]/dist" ),
+                      fgGetString( "/autopilot/route-manager/wp[1]/eta" ) );
+            HUD_TextList.add( fgText( 40, apY, hud_wp1_text ) );
+            apY -= 15;
+        }
+        string wp2_id = fgGetString( "/autopilot/route-manager/wp-last/id" );
+        if ( wp2_id.length() > 0 ) {
+            snprintf( hud_wp2_text, 256, "%5s %6.1fnm %s", wp2_id.c_str(), 
+                      fgGetDouble( "/autopilot/route-manager/wp-last/dist" ),
+                      fgGetString( "/autopilot/route-manager/wp-last/eta" ) );
+            HUD_TextList.add( fgText( 40, apY, hud_wp2_text ) );
+            apY -= 15;
+        }
+    }
+  
+    if ( strcmp( altitude_enabled->getStringValue(), "altitude-hold" ) == 0 ) {
+        snprintf( hud_alt_text, 256, "alt = %.0f\n",
+                  fgGetDouble("/autopilot/settings/target-altitude-ft") );
+        HUD_TextList.add( fgText( 40, apY, hud_alt_text ) );
+        apY -= 15;
+    } else if ( strcmp( altitude_enabled->getStringValue(), "agl-hold" ) == 0 ){
+        snprintf( hud_alt_text, 256, "agl = %.0f\n",
+                  fgGetDouble("/autopilot/settings/target-agl-ft") );
+        HUD_TextList.add( fgText( 40, apY, hud_alt_text ) );
+        apY -= 15;
+    }
+
+    HUD_TextList.draw();
+
+    HUD_LineList.draw();
+
+    // glEnable(GL_LINE_STIPPLE);
+    // glLineStipple( 1, 0x00FF );
+    // HUD_StippleLineList.draw();
+    // glDisable(GL_LINE_STIPPLE);
+
+    if( antialiased_node->getBoolValue() ) {
+        // glDisable(GL_BLEND);
+        glDisable(GL_LINE_SMOOTH);
+        glLineWidth(1.0);
+    }
+
+    glEnable(GL_DEPTH_TEST);
+    glEnable(GL_LIGHTING);
 }