private float[] GenerateGradient(GridPoint gridPoint)
{
int hash = gridPoint.GetHashCode();
Random random = new Random(Generate.CombineSeed(seed, hash));
if (dimension == 1)
{
return(new float[] { (float)random.NextDouble() * 2 - 1 }); //between -1 and 1
}
float[] randomPoint = new float[dimension];
for (int i = 0; i < dimension; i++)
{
randomPoint[i] = GaussianRandom(random, 0, 1);
}
float sum = randomPoint.Sum(n => n * n);
float scale = (float)Math.Pow(sum, -0.5);
float[] grad = randomPoint.Select(coord => coord * scale).ToArray();
return(grad);
}