Creates a WCS aligned wedge centered about the world origin.
eOk if successful or an appropriate error code if not.
The inclined face is defined by the points
( xLen/2, -yLen/2, -zLen/2) (-xLen/2, -yLen/2, zLen/2) ( xLen/2, yLen/2, -zLen/2) (-xLen/2, +yLen/2, zLen/2)
The following constraints are applied: