[C#/WPF] 두 벡터의 각도 구하기

using System;
using System.Windows.Media.Media3D;

#region 각도 구하기 - GetAngle(vector1, vector2)

/// <summary>
/// 각도 구하기
/// </summary>
/// <param name="vector1">벡터 1</param>
/// <param name="vector2">벡터 2</param>
/// <returns>각도</returns>
public double GetAngle(Vector3D vector1, Vector3D vector2)
{
    return 180d / Math.PI * Math.Acos(Vector3D.DotProduct(vector1, vector2) / (vector1.Length * vector2.Length));
}

#endregion