如何在C#中平滑2D旋转？

using System;
using System.Windows.Forms;
using System.Drawing;

public class SmoothRotationForm : Form
{
    private Timer timer;
    private float angle;
    private PointF center;
    private PointF objectPosition;
    private float rotationSpeed;

    public SmoothRotationForm()
    {
        // 初始化窗体
        this.Text = "Smooth Rotation";
        this.Size = new Size(800, 600);
        this.DoubleBuffered = true;

        // 初始化旋转参数
        angle = 0;
        center = new PointF(400, 300);
        objectPosition = new PointF(350, 250);
        rotationSpeed = 1.5f;

        // 初始化定时器
        timer = new Timer();
        timer.Interval = 16; // 60帧每秒
        timer.Tick += Timer_Tick;
        timer.Start();
    }

    private void Timer_Tick(object sender, EventArgs e)
    {
        // 更新旋转角度
        angle += rotationSpeed;
        if (angle >= 360)
        {
            angle -= 360;
        }

        // 重绘窗体
        this.Invalidate();
    }

    protected override void OnPaint(PaintEventArgs e)
    {
        base.OnPaint(e);

        // 绘制旋转对象
        Graphics g = e.Graphics;
        g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
        g.Clear(Color.White);

        // 平移坐标系到旋转中心
        g.TranslateTransform(center.X, center.Y);

        // 旋转坐标系
        g.RotateTransform(angle);

        // 平移坐标系回到原点
        g.TranslateTransform(-center.X, -center.Y);

        // 绘制旋转对象
        g.FillEllipse(Brushes.Red, objectPosition.X, objectPosition.Y, 100, 100);
    }

    public static void Main()
    {
        Application.Run(new SmoothRotationForm());
    }
}