c# -绕轴旋转点

using System;
using System.Numerics;

class Program
{
    static void Main()
    {
        // 定义旋转角度（以弧度为单位）
        float angle = (float)Math.PI / 2;

        // 定义旋转轴
        Vector3 axis = new Vector3(0, 1, 0);

        // 定义旋转点
        Vector3 rotationPoint = new Vector3(1, 0, 0);

        // 定义待旋转的点
        Vector3 point = new Vector3(2, 0, 0);

        // 将旋转点平移到原点
        Vector3 translatedPoint = point - rotationPoint;

        // 绕旋转轴进行旋转
        Matrix4x4 rotationMatrix = Matrix4x4.CreateFromAxisAngle(axis, angle);
        Vector3 rotatedPoint = Vector3.Transform(translatedPoint, rotationMatrix);

        // 将旋转点平移回原位置
        Vector3 finalPoint = rotatedPoint + rotationPoint;

        Console.WriteLine("旋转前的点: " + point);
        Console.WriteLine("旋转后的点: " + finalPoint);
    }
}