BezierCurve:getSegment
Gets a BezierCurve that corresponds to the specified segment of this BezierCurve.
curve = BezierCurve:getSegment( startpoint, endpoint )
startpoint number The starting point along the curve. Must be between 0 and 1.
endpoint number The end of the segment. Must be between 0 and 1.
curve BezierCurve A BezierCurve that corresponds to the specified segment.