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Same as System Math Acos but if angle is out of range, the result is clamped

public static class MathUtility {     //-------------------------------------------------------------------------------------     /// <summary>     /// Same as System.Math.Acos but if angle is out of range, the result is clamped.     /// </summary>     /// <param name="angle">Input angle.</param>     /// <returns>Acos the angle.</returns>     //-------------------------------------------------------------------------------------     public static float SafeAcos(float angle)         {             if(angle <= -1.0f)             {                 return (float) (System.Math.PI);             }             if(angle >= 1.0f)             {                 return 0.0f;             }             return (float) System.Math.Acos(angle);         } }