WPF实现文字粒子闪烁动画效果

 public class Particle { /// 
 /// 形状 /// 
 public Ellipse Shape; /// 
 /// 坐标 /// 
 public Point Position; }

 /// 
 /// 粒子路径 /// 
 private Geometry particleGeometry; /// 
 /// 粒子个数 /// 
 private int particleCount = 100; /// 
 /// 粒子最小尺寸 /// 
 private static int sizeMin = 10; /// 
 /// 粒子最大尺寸 /// 
 private int sizeMax = 20; /// 
 /// 随机数 /// 
 private Random random; /// 
 /// 粒子列表 /// 
 private List particles; /// 
 /// 粒子容器 /// 
 private Canvas containerParticles; public ParticleSystem(Geometry _path, int _maxRadius, int _particleCount, Canvas _containerParticles) { particleGeometry = _path; particleCount = _particleCount; sizeMax = _maxRadius; containerParticles = _containerParticles; random = new Random(); particles = new List(); SpawnParticle(); } /// 
 /// 初始化粒子 /// 
 private void SpawnParticle() { //清空粒子队列 particles.Clear(); containerParticles.Children.Clear(); //生成粒子 for (int i = 0; i  /// 设置粒子大小动画 ///  private void SetParticleSizeAnimation(Ellipse p) { Storyboard sb = new Storyboard(); //动画完成事件 再次设置此动画 sb.Completed += (S, E) => { SetParticleSizeAnimation(p); }; int size = random.Next(sizeMin, sizeMax + 1); int time = random.Next(100, 1000); DoubleAnimation daX = new DoubleAnimation(size, new Duration(TimeSpan.FromMilliseconds(time))); DoubleAnimation daY = new DoubleAnimation(size, new Duration(TimeSpan.FromMilliseconds(time))); Storyboard.SetTarget(daX, p); Storyboard.SetTarget(daY, p); Storyboard.SetTargetProperty(daX, new PropertyPath("Width")); Storyboard.SetTargetProperty(daY, new PropertyPath("Height")); sb.Children.Add(daX); sb.Children.Add(daY); sb.Begin(); } /// 
 /// 获取随机颜色画刷 /// 
 private SolidColorBrush GetRandomColorBursh() { byte r = (byte)random.Next(128, 256); byte g = (byte)random.Next(128, 256); byte b = (byte)random.Next(128, 256); return new SolidColorBrush(Color.FromArgb(125, r, g, b)); }

 private ParticleSystem ps; public MainWindow() { InitializeComponent(); this.Loaded += MainWindow_Loaded; } private void MainWindow_Loaded(object sender, RoutedEventArgs e) { Geometry g = CreateTextPath("H E L L O", new Point(this.cvs_particleContainer.Margin.Left, this.cvs_particleContainer.Margin.Top), new Typeface(new FontFamily("Arial"), FontStyles.Normal, FontWeights.Bold, FontStretches.Normal), 200); ps = new ParticleSystem(g, 25, 350, this.cvs_particleContainer); } /// 
 /// 创建文本路径 /// 
 /// 文本字符串 /// 显示位置 /// 字体信息 /// 字体大小 ///  private Geometry CreateTextPath(string word, Point point, Typeface typeface, int fontSize) { FormattedText text = new FormattedText(word, new System.Globalization.CultureInfo("en-US"), FlowDirection.LeftToRight, typeface, fontSize, Brushes.Black); Geometry g = text.BuildGeometry(point); PathGeometry path = g.GetFlattenedPathGeometry(); return path; }