/// <summary>
/// Converts a direction vector to an angle, where angle is -PI to +PI.
/// </summary>
/// <param name="vec">Vector to get the angle from.</param>
/// <returns>Angle of the vector.</returns>
public static Angle ToAngle(this Vector2 vec)
{
return(Math.Atan2(vec.Y, vec.X));
}
/// <summary>
/// Constructs an instance of an angle from an (un)normalized direction vector.
/// </summary>
/// <param name="dir"></param>
public Angle(Vector2 dir)
{
dir = dir.Normalized;
Theta = Math.Atan2(dir.Y, dir.X);
}
