利用WPF实现一个简单的文字粒子闪烁动画特效

发布时间：2020-11-06 16:04:19

来源：亿速云

阅读：124

作者：Leah

本篇文章给大家分享的是有关利用WPF实现一个简单的文字粒子闪烁动画特效，小编觉得挺实用的，因此分享给大家学习，希望大家阅读完这篇文章后可以有所收获，话不多说，跟着小编一起来看看吧。

实现效果如下：

思路：首先根据显示文本创建文本路径Geometry，然后在路径内随机生成圆形粒子并添加动画。

步骤：

1、粒子类Particle.cs

public class Particle

{

///

/// 形状

///

public Ellipse Shape;

///

/// 坐标

///

public Point Position;

}

2、粒子系统ParticleSystem.cs

///

/// 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 < 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;

}

}

}

}

///

/// 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));

}

3、主窗体交互

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;

}

以上就是利用WPF实现一个简单的文字粒子闪烁动画特效，小编相信有部分知识点可能是我们日常工作会见到或用到的。希望你能通过这篇文章学到更多知识。更多详情敬请关注亿速云行业资讯频道。