fractionToPointAndDerivatives Method

evaluate the surface at u and v fractions.

fractionToPointAndDerivatives(fractionU: number, fractionV: number, result?: Plane3dByOriginAndVectors): Plane3dByOriginAndVectors

@returns plane with origin at the surface point, direction vectors are derivatives in the u and v directions.

@returns Returns point and derivative directions.

Parameter Type Description
fractionU number u coordinate, as a fraction of the knot range.
fractionV number v coordinate, as a fraction of the knot range.
result Plane3dByOriginAndVectors optional pre-allocated object for return values.

Returns - Plane3dByOriginAndVectors

plane with origin at the surface point, direction vectors are derivatives in the u and v directions.Returns point and derivative directions.

Defined in

Last Updated: 28 October, 2024