public static float getDegree(Vector2 v1, Vector2 v2)
{
return (float)Math.Acos(Vector2.Dot(v1, v2) / Math.Abs(v1.LengthSq() * v2.LengthSq()));
}
private static Vector2 apply_thresh_2d(int xval, int yval, int thresh, int max)
{
Vector2 pos = new Vector2((float)xval, (float)yval);
if (pos.LengthSq() < thresh * thresh)
return new Vector2(0.0f, 0.0f);
Vector2 n = pos;
n.Normalize();
n *= (float)thresh;
pos -= n;
pos *= 1.0f / (float)(max - thresh);
return pos;
}
