public float AngleBetween(Vector2 other)
{
Vector2 a = GetNormalized();
Vector2 b = other.GetNormalized();
float d = a.Dot(b);
return((float)Math.Acos(d));
}
float AngleBetween(Vector2 other)
{
Vector2 a = GetNormalized();
Vector2 b = other.GetNormalized();
float d = a.x * b.x + a.y * b.y;
return((float)Math.Acos(d));
}