fCraft.PerlinNoise3D.Compute C# (CSharp) Method

        public float Compute( float x, float y, float z )
        {
            float noise = 0;
            float amp = Amplitude;
            float freq = Frequency;
            for ( int i = 0; i < Octaves; i++ ) {
                noise += Noise( x * freq, y * freq, z * freq ) * amp;
                freq *= 2;                                // octave is the double of the previous frequency
                amp *= Persistence;
            }
            return noise;
        }