import { Vector3, Vector4 } from 'three'

export function findSpan(p: number, u: number, U: number[]): number
export function calcBasisFunctions(span: number, u: number, p: number, U: number[]): number[]
export function calcBSplinePoint(p: number, U: number[], P: Vector4[], u: number): Vector4
export function calcBasisFunctionDerivatives(span: number, u: number, p: number, n: number, U: number[]): number[][]
export function calcBSplineDerivatives(p: number, U: number[], P: Vector4[], u: number, nd: number): Vector4[]
export function calcKoverI(k: number, i: number): number
export function calcRationalCurveDerivatives(Pders: Vector4[]): Vector3[]
export function calcNURBSDerivatives(p: number, U: number[], P: Vector4[], u: number, nd: number): Vector3[]
export function calcSurfacePoint(
  p: number,
  q: number,
  U: number[],
  V: number[],
  P: Vector4[],
  u: number,
  v: number,
  target: Vector3,
): Vector3