基于HTML5 Canvas实现雨滴效果： Rainday.js
jopen
10年前
一个简单的脚本来模拟雨滴落在玻璃表面效果。rainyday.js拥有功能可扩展的API，碰撞检测，并很容易用自己不同的动画组件实现扩展。Rainyday.js是一个纯的JavaScript库，用到了HTML5的特性，所以都支持大多数现代浏览器它。
How to use: var engine = new RainyDay({ element: image, // Image element // This value is required parentElement: someDiv, // Element to be used as a parent for the canvas // If not provided assuming the 'body' element crop: [0, 0, 50, 60], // Coordinates if only a part of the image should be used // If not provided entire image will be used blur: 10, // Defines blur due to rain effect // Assuming 10 if not provided // Use 0 value to disable the blur opacity: 1 // Opacity of rain drops // Assuming 1 if not provided }); engine.rain( [ [1, 0, 20], // add 20 drops of size 1... [3, 3, 1] // ... and 1 drop of size from 3 - 6 ... ], 100); 