本文例項為大家分享了WPF實現文字粒子閃爍動畫的具體程式碼，供大家參考，具體內容如下

實現效果如下：

思路：首先根據顯示文字建立文字路徑Geometry，然後在路徑內隨機生成圓形粒子並新增動畫。

步驟：

1、粒子類Particle.cs

public class Particle
 {
    /// <summary>
    /// 形狀
    /// </summary>
    public Ellipse Shape;
    /// <summary>
    /// 座標
    /// </summary>
    public Point Position;
}

2、粒子系統ParticleSystem.cs

/// <summary>
/// 粒子路徑
/// </summary>
private Geometry particleGeometry;
 
/// <summary>
/// 粒子個數
/// </summary>
private int particleCount = 100;
 
/// <summary>
/// 粒子最小尺寸
/// </summary>
private static int sizeMin = 10;
 
/// <summary>
/// 粒子最大尺寸
/// </summary>
private int sizeMax = 20;
 
/// <summary>
/// 隨機數
/// </summary>
private Random random;
 
/// <summary>
/// 粒子列表
/// </summary>
private List<Particle> particles;
 
/// <summary>
/// 粒子容器
/// </summary>
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<Particle>();
      SpawnParticle();
    }
 
    /// <summary>
    /// 初始化粒子
    /// </summary>
    private void SpawnParticle()
    {
      //清空粒子佇列
      particles.Clear();
      containerParticles.Children.Clear();
 
      //生成粒子
      for (int i = 0; i < particleCount; i++)
      {
        double size = random.Next(sizeMin,sizeMax + 1);
        while(true)
        {
          Point po = new Point(random.Next((int)particleGeometry.Bounds.Left,(int)particleGeometry.Bounds.Right),random.Next((int)particleGeometry.Bounds.Top,(int)particleGeometry.Bounds.Bottom));
          if (particleGeometry.FillContains(po,2,ToleranceType.Absolute))
          {
            Particle p = new Particle
            {
              Shape = new Ellipse
              {
                Width = size,Height = size,Stretch = System.Windows.Media.Stretch.Fill,Fill = GetRandomColorBursh(),},Position = po,};
            SetParticleSizeAnimation(p.Shape);
            particles.Add(p);
            Canvas.SetLeft(p.Shape,p.Position.X);
            Canvas.SetTop(p.Shape,p.Position.Y);
            containerParticles.Children.Add(p.Shape);
            break;
          }
        }
      }
    }
 
    /// <summary>
    /// 設定粒子大小動畫
    /// </summary>
    private void SetParticleSizeAnimation(Ellipse p)
    {
      Storyboard sb = new Storyboard();
      //動畫完成事件 再次設定此動畫
      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();
    }
 
    /// <summary>
    /// 獲取隨機顏色畫刷
    /// </summary>
    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));
}

3、主窗體互動

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);
    }
 
    /// <summary>
    /// 建立文字路徑
    /// </summary>
    /// <param name="word">文字字串</param>
    /// <param name="point">顯示位置</param>
    /// <param name="typeface">字型資訊</param>
    /// <param name="fontSize">字型大小</param>
    /// <returns></returns>
    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;
}

以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支援我們。