API Reference > geometry-core > Bspline > KnotVector > evaluateBasisFunctions1 evaluateBasisFunctions1 Method Evaluate basis fucntions f[] at knot value u. evaluateBasisFunctions1(knotIndex0: number, u: number, f: Float64Array, df: Float64Array, ddf?: Float64Array): void Parameter Type Description knotIndex0 number u number knot value for evaluation f Float64Array array of basis values. ASSUMED PROPER LENGTH df Float64Array ddf Float64Array Returns - void Defined in bspline/KnotVector.ts Line 285 Last Updated: 11 June, 2024