//fractal brownian motion to create more realistic terrain
public float FBM(Vector3 vec)
{
float Frequency = NoiseScale / 100f;
float Amplitude = 1;
float weight = 1f;
float noise = 0;
// float offsetRange = 1000;
for (int i = 0; i < Octaves; i++)
{
//Passing in a seeded offset at octave level causes mesh issues not seen on the GPU - removed from both functions to match terrains up
///Vector3 OctaveOffset = new Vector3((float)rnd.NextDouble() * 2 - 1, (float)rnd.NextDouble() * 2 - 1, (float)rnd.NextDouble() * 2 - 1) * 1000;
float f = PerlinNoise.CNoise(vec * Frequency + Offset);
float v = 1 - Mathf.Abs(f);
v *= v;
v *= weight;
weight = Mathf.Max(Mathf.Min(v * WeightMultiplier, 1), 0);
noise += v * Amplitude;
Amplitude *= Persistence;
Frequency *= Lacunarity;
}
float c = -(vec.y + FloorOffset) + (noise * NoiseWeight);
if (vec.y < HardFloor)
{
c += HardFloorWeight;
}
return(c);
}