+Z
              /________________________
             /\    \    \    \    \    \
            /  \____\____\____\____\____\
           /\  /\    \    \    \    \    \
          /  \/  \____\____\____\____\____\
         /\  /\  /\    \    \b   \    \    \
        /  \/  \/  \____\____\____\____\____\
       /\  /\  /\  /\    \    \    \    \    \
      /  \/  \/  \/  \____\____\____\____\____\
 +Y  /\  /\  /\  /\  /\    \    \    \    \    \
   \/  \/  \/a \/  \/  \____\____\____\____\____\
   /\  /\  /\  /\  /\  /    /    /    /    /    /
 -Z  \/  \/  \/  \/  \/____/____/____/____/____/
      \  /\  /\  /\  /    /    /    /    /    /
       \/  \/  \/  \/____/____/____/____/____/
        \  /\  /\  /    /    / c  /    /    /
         \/  \/  \/____/____/____/____/____/
          \  /\  /    /    /    /    /    /
           \/  \/____/____/____/____/____/
            \  /    /    /    /    /    /
            _\/____/____/____/____/____/_  
          -X  \                          +X
              -Y

##</code><code>##

function _BoundingBoxDraw( ) {
    var minOrMaxX = ( ( this.Parent.Fi < 90 ) || ( this.Parent.Fi >= 270 ) ); 
    var minOrMaxY = ( this.Parent.Fi >= 180 );                                
    var minOrMaxZ = ( this.Parent.Th <= 0 );                                  

    drawFace( this, 'z', 'x', 'y', 0, 0, 1, minOrMaxZ, minOrMaxX, minOrMaxY );
    drawFace( this, 'y', 'x', 'z', 1, 2, 3, minOrMaxY, minOrMaxX, minOrMaxZ );
    drawFace( this, 'x', 'y', 'z', 2, 4, 5, minOrMaxX, minOrMaxY, minOrMaxZ );
}

##</code><code>##

   +Y                                +Y                                +Z
 -Z +----+----+----+----+----+ +Z  -X +----+----+----+----+----+ +X  -X +----+----+----+----+----+ +X
    |    |    |    |    |    |        |    |    |    |    |    |        |    |    |    |    |    |
    +----+----+----+----+----+        +----+----+----+----+----+        +----+----+----+----+----+   
    |    |    |    |    |    |        |    |    |    |    |    |        |    |    |    |    |    |
    +----+----+----+----+----+        +----+----+----+----+----+        +----+----+----+----+----+   
    |    |    | a  |    |    |        |    |    | b  |    |    |        |    |    | c  |    |    |
    +----+----+----+----+----+        +----+----+----+----+----+        +----+----+----+----+----+   
    |    |    |    |    |    |        |    |    |    |    |    |        |    |    |    |    |    |
    +----+----+----+----+----+        +----+----+----+----+----+        +----+----+----+----+----+   
    |    |    |    |    |    |        |    |    |    |    |    |        |    |    |    |    |    |
    +----+----+----+----+----+        +----+----+----+----+----+        +----+----+----+----+----+   
   -Y                                -Y                                -Z

##</code><code>##

function drawFace( me, face, horizontal, vertical, planeIdx, line1, line2, drawMinFace, cond2, cond3 ) {
    var world3D = new Vector( 0,0,0 );

    world3D[face]        = drawMinFace ? me.Min[face] : me.Max[face];
    world3D[horizontal]     = me.Min[horizontal];
    world3D[vertical]   = me.Min[vertical];
    var screen2D = me.Parent.ScreenPos( world3D );
    // calculate and construct Bbox rectangle path
    ss = "M " + screen2D.x + " " + screen2D.y + " "; // move to corner 1

    world3D[horizontal] = me.Max[horizontal];
    screen2D = me.Parent.ScreenPos( world3D );
    ss += "L " + screen2D.x + " " + screen2D.y + " "; // line to corner 2

    world3D[vertical] = me.Max[vertical];
    screen2D = me.Parent.ScreenPos( world3D );
    ss += "L " + screen2D.x + " " + screen2D.y + " "; // line to corner 3

    world3D[horizontal] = me.Min[horizontal];
    screen2D = me.Parent.ScreenPos( world3D );
    ss += "L " + screen2D.x + " " + screen2D.y + " z"; // line to corner 4 and close back to corner 1

    me.Plane[planeIdx].setAttribute( "d", ss );  // [d]efine the path for this panes Bbox

    world3D[face] = 1; world3D[horizontal] = 0; world3D[vertical] = 0;

    // and set its attributes
    me.Plane[planeIdx].setAttribute( "fill", me.Parent.GetColor( me.FillColor, me.FillColor, world3D, drawMinFace ? me.Min : me.Max ) );
    me.Plane[planeIdx].setAttribute( "stroke", me.StrokeColor );
    me.Plane[planeIdx].setAttribute( "stroke-width", me.StrokeWeight );
    me.Plane[planeIdx].setAttribute( "visibility", "visible" );

    world3D[face] = drawMinFace ? me.Min[face] : me.Max[face];

    // Draw the horizontal and vertical grid lines on this Bbox face
    drawGrid( me, face, horizontal, vertical, line1, cond3, world3D ); // horizontal
    drawGrid( me, face, vertical, horizontal, line2, cond2, world3D ); // vertical
}

##</code><code>##

function drawGrid( me, face, horizontal, vertical, idx, tickPosn, pp ) {
    var ii = 0, uu = 0;
    var grid = _GetGrid( me.Min[horizontal] / me.Parent.Zoom[horizontal], me.Max[horizontal] / me.Parent.Zoom[horizontal], me.Scale[horizontal] );
    if( me.GridDelta[horizontal] != 0 ) grid.step = me.GridDelta[horizontal];

    for( var jj = grid.max; jj >= grid.min; jj -= grid.step ) {
        pp[horizontal] = jj * me.Parent.Zoom[horizontal];
        pp[vertical] = me.Min[vertical];
        var vv = me.Parent.ScreenPos( pp );
        fromOV( me.Line[idx][ii], vv.x, vv.y ); // Move to the start(min) of this gridline

        var xx = vv.x, yy = vv.y; // copy of start x/y for later
        pp[vertical] = me.Max[vertical];
        vv = me.Parent.ScreenPos( pp );  // pp changed; get again
        toOV( me.Line[idx][ii], vv.x, vv.y );  // And draw to the other(max) end
        me.Line[idx][ii].setAttribute( "stroke", me.StrokeColor );  // Set the color
        me.Line[idx][ii].setAttribute( "visibility", "visible" );   // and make visible

        if( tickPosn ) { // Move the tick labels to the appropriate end of the gridlines; 1.06 standoff of label; uu (fudge factor for zooming (not used))
            me.Text[idx][ii].setAttribute( "x", Math.floor( xx + ( vv.x - xx ) * 1.06 ) - 50 * uu );
            me.Text[idx][ii].setAttribute( "y", Math.floor( yy + ( vv.y - yy ) * 1.06 ) -  7 * uu );
        }
        else {
            me.Text[idx][ii].setAttribute( "x", Math.floor( vv.x + ( xx - vv.x ) * 1.06 ) - 50 * uu );
            me.Text[idx][ii].setAttribute( "y", Math.floor( vv.y + ( yy - vv.y ) * 1.06 ) -  7 * uu );
        }
        me.Text[idx][ii].setAttribute( "fill",  me.StrokeColor );
        me.Text[idx][ii].setAttribute( "visibility", "visible" );
        
        if( ( ii == 1 ) && ( me.Label[horizontal] ) )  // if 1st (not zeroth?) gridline, add the axis label
            innerTextOV( me.Text[idx][ii], me.Label[horizontal] );
        else { // otherwise add the tick value
            if( isNaN( me.Scale[horizontal] ) ) {
                if( me.Scale[horizontal].substr( 0,9 ) == "function " ) {
                    ff = eval( "window." + me.Scale[horizontal].substr( 9 ) );
                    if( ff ) innerTextOV( me.Text[idx][ii], ff( _ScaleString( jj, grid.step ) ) );
                }
                else innerTextOV( me.Text[idx][ii], _ScaleString( jj, grid.step ) + me.Scale[horizontal] );
            }
            else {
                if( me.Scale[horizontal]  < 1 ) innerTextOV( me.Text[idx][ii], "" );
                if( me.Scale[horizontal] == 1 ) innerTextOV( me.Text[idx][ii], _ScaleString( jj, grid.step ) );
                if( me.Scale[horizontal]  > 1 ) innerTextOV( me.Text[idx][ii],  _DateFormat( jj, grid.step, me.Scale[horizontal] ) );
            }
        }
        ii++;
    }
}