canvas实现三元花绽放动画效果代码
代码语言:html
所属分类:动画
代码描述:canvas实现三元花绽放动画效果代码
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
<html lang="en"><head> <meta charset="UTF-8"> <style> body { font-family: Arial, Helvetica, "Liberation Sans", FreeSans, sans-serif; background-color: #000; margin:0; padding:0; border-width:0; } </style> </head> <body> <script > "use strict"; window.addEventListener("load", function () { const NBCOLORS = 3; // integer, >= 1 let lRef; let initSpeed, rMax; let canv, ctx; // canvas and context : global variables (I know :( ) let maxx, maxy; // canvas sizes (in pixels) let particles; let click; let hues, angle0; let org; // shortcuts for Math.… const mrandom = Math.random; const mfloor = Math.floor; const mround = Math.round; const mceil = Math.ceil; const mabs = Math.abs; const mmin = Math.min; const mmax = Math.max; const mPI = Math.PI; const mPIS2 = Math.PI / 2; const m2PI = Math.PI * 2; const msin = Math.sin; const mcos = Math.cos; const matan2 = Math.atan2; const mhypot = Math.hypot; const msqrt = Math.sqrt; const rac3 = msqrt(3); const rac3s2 = rac3 / 2; const mPIS3 = Math.PI / 3; //----------------------------------------------------------------------------- // miscellaneous functions //----------------------------------------------------------------------------- function alea(min, max) { // random number [min..max[ . If no max is provided, [0..min[ if (typeof max == 'undefined') return min * mrandom(); return min + (max - min) * mrandom(); } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - function intAlea(min, max) { .........完整代码请登录后点击上方下载按钮下载查看
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