canvas实现拨开云雾见太阳光芒四射晚霞逼真动画效果代码-html代码-BFW代码库

canvas实现拨开云雾见太阳光芒四射晚霞逼真动画效果代码

代码语言：html

所属分类：动画

代码描述：canvas实现拨开云雾见太阳光芒四射晚霞逼真动画效果代码

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title></title>

<style>
html, body {
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  overflow: hidden;
}
</style>

</head>
<body>

<canvas></canvas>

<script>
// Currently in Chrome you need to click the "Get Adobe Flash" button so it'll ask you if you want to
// allow flash to run.

// The rest of this is formatted as:
//    // Explanation of the compressed code
//    // ...
//
//    // Commented out, compressed code
//
//    Readable (more or less) version of the code
//    ...

document.addEventListener("DOMContentLoaded", go);

function go() {
    "use strict";
    // JS1K's HTML shim gives us a canvas (a) and its 2D context (c) for free. We'll set them up here.

    let canvas = document.querySelector('canvas');
    let ctx = canvas.getContext('2d');

    // First off - we define an abbreviation function. This takes an object, iterates over its properties
    // and stores their names as strings in a 2 or 3 letter variable ("this" is the window object).
    //
    // p[0]+p[6] will evaluate to the 1st and 7th letter (or the 1st+"undefined" if there's no 7th),
    // [p[20]] will be an empty string if the property's name is too short ([undefined] gets coerced to
    // an empty string).
    //
    // This is a variation on Marijn Haverbeke's technique - see https://marijnhaverbeke.nl/js1k/
    //
    // We won't be using it in the readable version of the demo.

    // A=o=>{for(p in o)this[p[0]+p[6]+[p[20]]]=p}

    // Next we abbreviate all the properties in our window object because requestAnimationFrame() is
    // kind of long. We can't call A(window) because it will try to abbreviate all our abbreviations (since
    // it stores them in the window object) so we'll use it on "top" which has the same properties.
    // We really just need a shorter requestAnimationFrame().
    //
    // S.........完整代码请登录后点击上方下载按钮下载查看