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              +Z
...
            _\/____/____/____/____/____/_  
          -X  \                          +X
              -Y

function _BoundingBoxDraw( ) {
    var minOrMaxX = ( ( this.Parent.Fi < 90 ) || ( this.Parent.Fi >= 2
+70 ) ); 
...
    drawFace( this, 'y', 'x', 'z', 1, 2, 3, minOrMaxY, minOrMaxX, minO
+rMaxZ );
    drawFace( this, 'x', 'y', 'z', 2, 4, 5, minOrMaxX, minOrMaxY, minO
+rMaxZ );
}

   +Y                                +Y                               
+ +Z
 -Z +----+----+----+----+----+ +Z  -X +----+----+----+----+----+ +X  -
+X +----+----+----+----+----+ +X
...
    |    |    |    |    |    |        |    |    |    |    |    |      
+  |    |    |    |    |    |
    +----+----+----+----+----+        +----+----+----+----+----+      
+  +----+----+----+----+----+   
   -Y                                -Y                               
+ -Z

function drawFace( me, face, horizontal, vertical, planeIdx, line1, li
+ne2, drawMinFace, cond2, cond3 ) {
    var world3D = new Vector( 0,0,0 );
...
    drawGrid( me, face, horizontal, vertical, line1, cond3, world3D );
+ // horizontal
    drawGrid( me, face, vertical, horizontal, line2, cond2, world3D );
+ // vertical
}

function drawGrid( me, face, horizontal, vertical, idx, tickPosn, pp )
+ {
    var ii = 0, uu = 0;
...
        ii++;
    }
}