C# GDI+ 画心形 跳动动画

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所属分类:.NET技术
摘要

最近听说什么国产神剧的期中考试画心形题很火,打算跟风用C#复刻一下先看看效果:

最近听说什么国产神剧的期中考试画心形题很火,打算跟风用C#复刻一下

先看看效果:
C# GDI+ 画心形 跳动动画

话不多说直接上代码

        public Form1()         {             DoubleBuffered = true;  //首先窗体记得设置双缓冲             SetStyle(ControlStyles.ResizeRedraw | ControlStyles.OptimizedDoubleBuffer | ControlStyles.AllPaintingInWmPaint, true);             InitializeComponent();         } 
        /// <summary>         /// 是否反向         /// </summary>         private bool goBack = false;         /// <summary>         /// 当前跳动动画缩放倍率         /// </summary>         private int iZoom = 10;         /// <summary>         /// 跳动速度         /// </summary>         private int Speed { get; set; } = 8;         /// <summary>         /// 绘制笔刷颜色         /// </summary>         private Brush Color { get; set; } = Brushes.LightPink;         /// <summary>         /// 中心缩放倍率         /// </summary>         private int Zoom { get; set; } = 10;         /// <summary>         /// 点数量(包括心形边线和粒子)         /// </summary>         private int Particle { get; set; } = 20;         /// <summary>         /// 一次扩散范围         /// </summary>         private int FirstDiffusion { get; set; } = 10;         /// <summary>         /// 二次扩散范围         /// </summary>         private int SecondDiffusion { get; set; } = 30;          protected override void OnPaint(PaintEventArgs e)         {             base.OnPaint(e);             iZoom += goBack ? -1 : 1;             if (iZoom >= (Zoom + 2) || iZoom <= (Zoom - 3))                 goBack = !goBack;             Bitmap bmp = new Bitmap(Width, Height);             Graphics g = Graphics.FromImage(bmp);  //如果想看到绘制的过程可以使用 e.Graphics 直接绘制在窗体上而不是绘制在图片中再替换背景             Random random = new Random();             for (int i = 0; i < Particle * 100; i++)             {                 double t = random.NextDouble() * 2 * Math.PI;                 double x = 16 * (Math.Pow(Math.Sin(t), 3));  //心形曲线函数X                 double y = -(13 * Math.Cos(t) - 5 * Math.Cos(2 * t) - 2 * Math.Cos(3 * t) - Math.Cos(4 * t));  //心形曲线函数Y                 x *= iZoom;                 y *= iZoom;                 x += Width / 2;                 y += Height / 2;                 g.FillEllipse(Color, new Rectangle((int)x, (int)y, 10, 10));  //在随机到的心形函数路径上添加点                 if (i % 2 == 0)  //控制扩散点的数量                 {                     Random random2 = new Random();                     int add1 = random2.Next(-FirstDiffusion, FirstDiffusion);                     int add2 = random2.Next(-FirstDiffusion, FirstDiffusion);                     g.FillEllipse(Color, new Rectangle((int)x + add1, (int)y + add2, 5, 5));  //一次扩散的点                     g.FillEllipse(Color, new Rectangle((int)x + add1, (int)y + add2, 5, 5));                 }                 if (i % 3 == 0)                 {                     Random random2 = new Random();                     int add1 = random2.Next(-SecondDiffusion, SecondDiffusion);                     int add2 = random2.Next(-SecondDiffusion, SecondDiffusion);                     g.FillEllipse(Color, new Rectangle((int)x + add1, (int)y + add2, 5, 5));  //二次扩散的点                     g.FillEllipse(Color, new Rectangle((int)x + add1, (int)y + add2, 5, 5));                 }             }             BackgroundImage = bmp;             Thread.Sleep((10 - Speed) * 10);         }     } } 

最后添加一个设置界面,使得功能多样化一点:
C# GDI+ 画心形 跳动动画

源码:
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