/// <summary></summary>
public FilterNormalDirection(V3f direction, float epsInDegrees)
{
var e = (float)Math.Sin(Conversion.RadiansFromDegrees(Fun.Clamp(epsInDegrees, 0.0, 90.0)));
Direction = direction.Normalized;
EpsInDegrees = epsInDegrees;
m_eps = e * e;
}