getPRange
Range of parameter p. - Case arcLength: p in [0, @length of ] - Case normalized: p in [0, 1]
Return
possibleobject is E_ParamPoly3_PRange
Range of parameter p. - Case arcLength: p in [0, @length of ] - Case normalized: p in [0, 1]
possibleobject is E_ParamPoly3_PRange