Function rgbaLanczosInterpolation

rgbaLanczosInterpolation(
    point: VectorPoint,
    refData: VectorPoint<RGBA>[],
    kernelRadius?: number,
): RGBA
Helper function for lanczosInterpolation on RGB(A) data. Light in RGB data is logarithmically weighted, so we need to expand each component by n^2 to get the correct weight for each component.
Parameters
- point: VectorPoint
  Point to interpolate
- refData: VectorPoint<RGBA>[]
  Reference data points
- kernelRadius: number = 2
  Lanczos kernel radius (default is 2) Recommend to only use 2 or 3.
Returns RGBA
- The interpolated RGBA data.