AccidentalNoise.Noise.InternalGradientNoise C# (CSharp) Method

        internal static Double InternalGradientNoise(
            Double x, Double y, Double z, Double w, Double u, Double v,
            Int32 ix, Int32 iy, Int32 iz, Int32 iw, Int32 iu, Int32 iv, 
            Int32 seed)
        {
            var hash = Noise.HashCoordinates(ix, iy, iz, iw, iu, iv, seed);

            var dx = x - ix;
            var dy = y - iy;
            var dz = z - iz;
            var dw = w - iw;
            var du = u - iu;
            var dv = v - iv;

            return (dx * NoiseLookupTable.Gradient6D[hash, 0] +
                    dy * NoiseLookupTable.Gradient6D[hash, 1] +
                    dz * NoiseLookupTable.Gradient6D[hash, 2] +
                    dw * NoiseLookupTable.Gradient6D[hash, 3] +
                    du * NoiseLookupTable.Gradient6D[hash, 4] +
                    dv * NoiseLookupTable.Gradient6D[hash, 5]);
        }