/// <summary>
/// Returns settings value at given point.
/// </summary>
/// <param name="x">X coordinate</param>
/// <param name="y">Y coordinate</param>
/// <param name="z">Z coordinate</param>
/// <returns>Noise value</returns>
public override float GetValue(float x, float y, float z)
{
int ix = Mathf.FloorToInt(x);
int iy = Mathf.FloorToInt(y);
// interpolate the coordinates instead of values - it's way faster
float xs = SCurve.Interpolate(x - ix);
float ys = SCurve.Interpolate(y - iy);
// THEN we can use linear interp to find our value - biliear actually
float n0 = m_Source.GetValue(ix, iy, 0);
float n1 = m_Source.GetValue(ix + 1, iy, 0);
float ix0 = Mathf.Lerp(n0, n1, xs);
n0 = m_Source.GetValue(ix, iy + 1, 0);
n1 = m_Source.GetValue(ix + 1, iy + 1, 0);
float ix1 = Mathf.Lerp(n0, n1, xs);
return(Mathf.Lerp(ix0, ix1, ys));
}
/// <summary>
/// Create new generator with specified seed and interpolation algorithm. Different interpolation algorithms can make noise smoother at the expense of speed.
/// </summary>
/// <param name="seed">noise seed</param>
/// <param name="sCurve">Interpolator to use. Can be null, in which case default will be used</param>
public GradientNoise(int seed, SCurve sCurve)
{
m_seed = seed;
m_SCurve = sCurve;
}
/// <summary>
/// Create new generator with specified seed and interpolation algorithm. Different interpolation algorithms can make noise smoother at the expense of speed.
/// </summary>
/// <param name="seed">noise seed</param>
/// <param name="sCurve">Interpolator to use. Can be null, in which case default will be used</param>
public ValueNoise(int seed, SCurve sCurve)
{
m_source = new LatticeNoise(seed);
m_SCurve = sCurve;
}
/// <summary>
/// Create new generator with specified seed and interpolation algorithm. Different interpolation algorithms can make noise smoother at the expense of speed.
/// </summary>
/// <param name="seed">noise seed</param>
/// <param name="sCurve">Interpolator to use. Can be null, in which case default will be used</param>
public ValueNoise(int seed, SCurve sCurve)
{
m_Source = new CoherentNoise.LatticeNoise(seed);
m_SCurve = sCurve;
}
