internal static Double interpolate_X_2( Double x, Double y, Double xs, Int32 x0, Int32 x1, Int32 iy, Int32 seed, WorkerNoise2 noisefunc) { var v1 = noisefunc(x, y, x0, iy, seed); var v2 = noisefunc(x, y, x1, iy, seed); return Lerp(xs, v1, v2); }