c#里面怎么画一个球做圆周运动？

各位大佬，我想问一下，c#里面怎么画一个球做圆周运动？

参考这个https://ask.csdn.net/questions/7462443，先画一个圆，然后擦掉这个圆，然后修改圆心坐标从新画个原，圆心位置，就用公式套出来就可以，圆心，半径+角度，这样就是圆周运动了

        private void AroundCircle()
        {
            // 确定圆心坐标，半径，和初始角度
            int x0 = this.Width / 2;
            int y0 = this.Height / 2;
            int r = 40;
            int a = 0;
            while (true)
            {
                a += 1; // 角度变换
                if (button1.Text == "开始")
                {
                    return;
                }
                float x = (float)(x0 + r * Math.Cos(a * Math.PI / 180));  // 根据圆心，角度，半径，计算目标圆的圆心位置
                float y = (float)(y0 + r * Math.Sin(a * Math.PI / 180));
                this.Invoke(new MethodInvoker(delegate
                {
                    int w = 20;
                    int h = w;
                    Graphics g = this.CreateGraphics();
                    Pen p = new Pen(Color.Red, 2);
                    g.DrawEllipse(p, x, y, w, h);  // 画出目标圆
                    g.DrawEllipse(p, x0, y0, w, h);  // 画出圆心圆
                    Thread.Sleep(100);   // 等待100毫秒
                    g.Clear(Color.White);   // 清除画布
                }));
            }
        }

```

你俩可以交流沟通一下，说不定能碰撞出什么思路，https://ask.csdn.net/questions/7465512?spm=1005.2025.3001.5141

很简单的，用GDI的接口自己算算坐标画一画就ok了，粗糙的帮你划了一下，具体看下面。

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

namespace WindowsFormsApp3
{
    public partial class Form2 : Form
    {

        public Form2()
        {
            InitializeComponent();
            this.DoubleBuffered = true;
            this.Load += Form2_Load;
        }


        CircularMotion cm = new CircularMotion();
        Timer timer = new Timer();
        Stopwatch stopwatch = new Stopwatch();
        int count = 0;

        private void Form2_Load(object sender, EventArgs e)
        {
            timer.Tick += Timer_Tick;
            timer.Interval = 10;
            cm.CenterPoint = new Point(200, 200);
            cm.Radium = 150;
            cm.W = 0.0001;
            timer.Start();
            stopwatch.Start();
        }

        private void Timer_Tick(object sender, EventArgs e)
        {
            cm.TimeSpan = stopwatch.ElapsedMilliseconds;
            this.Invalidate();
            count++;
        }

        protected override void OnPaint(PaintEventArgs e)
        {
            cm.Draw(e.Graphics);
            base.OnPaint(e);
        }


    }

    public class CircularMotion
    {
        // 角速度
        public double W { get; set; }

        // 圆周运动半径
        public double Radium { get; set; }

        // 中心坐标
        public Point CenterPoint { get; set; }

        // 经过的时间 ms
        public double TimeSpan { get; set; }

        public int MessPointX { get; private set; }
        public int MessPointY{ get; private set; }

        // 画质点
        private void DrawMassPoint(Graphics e)
        {
            // 转过的弧度
            double radian = W * TimeSpan;
            // 把弧度换算成角度
            double angle = 180 * radian / Math.PI;

            // 计算质点实时坐标
            MessPointX = (int)(CenterPoint.X + Math.Cos(angle) * Radium);
            MessPointY = (int)(CenterPoint.Y + Math.Sin(angle) * Radium);
            // 画质点
            int r = 5;
            int rLeft = (int)(MessPointX - r);
            int rTop = (int)(MessPointY - r);
            e.FillEllipse(new SolidBrush(Color.Red), new Rectangle(rLeft, rTop, (int)(2 * r), (int)(2 * r)));

        }

        // 画质点
        private void DrawPath(Graphics e)
        {
            int rLeft = (int)(CenterPoint.X - Radium);
            int rTop = (int)(CenterPoint.Y - Radium);
            e.DrawEllipse(new Pen(Color.Red, 1f), new Rectangle(rLeft, rTop, (int)(2 * Radium), (int)(2 * Radium)));
        }

        // 画中心点
        private void DrawCenterPoint(Graphics e)
        {
            int r = 3;
            int rLeft = (int)(CenterPoint.X - r);
            int rTop = (int)(CenterPoint.Y - r);

            e.DrawEllipse(new Pen(Color.Red, 1f), new Rectangle(rLeft, rTop, (int)(2 * r), (int)(2 * r)));
        }

        // 画质点
        private void DrawChainLine(Graphics e)
        {
            e.DrawLine(new Pen(Color.Red, 1f),CenterPoint.X, CenterPoint.Y, MessPointX, MessPointY);
        }

        public void Draw(Graphics e)
        {
            DrawCenterPoint(e);
            DrawPath(e);
            DrawMassPoint(e);
            DrawChainLine(e);

        }
    }
}