jQuery烟雾背景发生器（HTML5 Canvas插件waterpipe.js

# waterpipe.js - smoky backgrounds generator (HTML5 Canvas) waterpipe.js is a jQuery plugin for smoky backgrounds developed by [dragdropsite.com](http://www.dragdropsite.com)  ##Examples Here are some examples generated using waterpipe.js plugin.             ##Usage **1. Include jQuery and waterpipe.js** <script src="lib/jquery-1.11.0.min.js"></script> <script src="waterpipe.js"></script> **2. Create wrapper with canvas element inside** <div id="wavybg-wrapper" style="width: 100%; height: 100%;"> <canvas>Your browser does not support HTML5 canvas.</canvas> </div> **3. Initialize with** var smokyBG = $('#wavybg-wrapper').waterpipe({ //Default values gradientStart: '#000000', gradientEnd: '#222222', smokeOpacity: 0.1, numCircles: 1, maxMaxRad: 'auto', minMaxRad: 'auto', minRadFactor: 0, iterations: 8, drawsPerFrame: 10, lineWidth: 2, speed: 1, bgColorInner: "#ffffff", bgColorOuter: "#666666" }); ##Options | Option | Type | Default | Description | |---------------|---------------|-----------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | gradientStart | string | '#000000' | Gradient start color in hex format. | | gradientEnd | string | '#222222' | Gradient end color in hex format. | | smokeOpacity | number | 0.1 | Smoke opacity 0 to 1. | | numCircles | int | 1 | Number of circles (smokes). | | maxMaxRad | int or 'auto' | 'auto' | Could be used to change circle radius size | | minMaxRad | int or 'auto' | 'auto' | Could be used to change circle radius size | | minRadFactor | int | 0 | It's a factor representing the size of the smallest radius with respect to the largest possible. Integer from 0 to 1. | | iterations | int | 8 | The number of subdividing steps to take when creating a single fractal curve. Can use more, but anything over 10 (thus 1024 points) is overkill for a moderately sized canvas. | | drawsPerFrame | int | 10 | Number of curves to draw on every tick of the timer | | lineWidth | number | 2 | Line width | | speed | int | 1 | Drawing speed (tick of timer in ms) | | bgColorInner | string | '#ffffff' | Background outer color in hex format | | bgColorOuter | string | '#666666' | Background inner color in hex format | ##Methods The following code could be used to call a method: `smokyBG.data('waterpipe').generate();`Please make sure variable smokyBG exists | Method | Arguments | Description | |-----------|-------------|-------------------------------------------------------------------------------------------------| | generate | | Generates background canvas | | setOption | optionName, | Set a new value to an option. Please check the above table for possible option names and values | | | optionValue | | | download | width: int, | Download size in pixels | | | height: int | | ##Demo Please check the demo to generate and download your own smoky backgrounds: [http://dragdropsite.github.io/waterpipe.js](http://dragdropsite.github.io/waterpipe.js) ##Credits [rectangleworld.com](http://rectangleworld.com/blog/) - big part of code has been taken from the examples provided on this blog ##License Licensed under MIT license