/// <summary>
///
/// </summary>
private void UpdateClusterCenters()
{
_clusterSizes.Clear();
for (int i = 0; i < _clusterCenters.Length; i++)
{
_clusterCenters[i].Clear();
}
// aggregate
for (int i = 0; i < _points.Length; i++)
{
var point = _points[i];
int nearest = _nearestClusters[i];
var center = _clusterCenters[nearest];
ArrayMath.Add(center, point, center);
_clusterSizes[nearest]++;
}
// average
for (int i = 0; i < _clusterCenters.Length; i++)
{
var size = _clusterSizes[i];
if (size == 0)
{
continue;
}
var center = _clusterCenters[i];
ArrayMath.Scale(center, 1.0 / size, center);
}
}
/// <summary>
///
/// </summary>
public static bool Unitize(double[] vector, int count, double[] result)
{
double d = ArrayMath.Dot(vector, vector, count);
if (d > 0.0)
{
Scale(vector, 1.0 / Math.Sqrt(d), count, result);
return(true);
}
return(false);
}
/// <summary>
///
/// </summary>
public static void Slerp(double[] v0, double[] v1, double t, double[] result)
{
Slerp(v0, v1, t, ArrayMath.Angle(v0, v1), v0.Length, result);
}