canvas泡泡漂浮滚动交互动画-html代码-BFW代码库

canvas泡泡漂浮滚动交互动画

代码语言：html

所属分类：动画

代码描述：canvas泡泡漂浮滚动交互动画

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 lang="en">
<head>
<meta charset="UTF-8">

<style>
* {
  margin: 0;
  padding: 0;
  color: #FFF;
  -webkit-user-select: none;
     -moz-user-select: none;
      -ms-user-select: none;
          user-select: none;
}

canvas#canvas {
  display: block;
  background: #ACE8FE;
}

ul#navigation {
  position: absolute;
  height: 100%;
  top: 0;
  right: 0;
  text-align: center;
  margin-right: 1.6rem;
  font-size: 0.8rem;
  -webkit-writing-mode: vertical-rl;
      -ms-writing-mode: tb-rl;
          writing-mode: vertical-rl;
}

ul#navigation > li {
  display: inline-block;
}
</style>

</head>
<body translate="no">
<canvas id="canvas">Canvas not supported.</canvas>
<ul id="navigation">
<li>Scroll up, down and right.</li>
</ul>

<script >
(function () {
  'use strict';
  window.addEventListener('load', function () {
    var canvas = document.getElementById('canvas');

    if (!canvas || !canvas.getContext) {
      return false;
    }

    /********************
        Random Number
      ********************/

    function rand(min, max) {
      return Math.floor(Math.random() * (max - min + 1) + min);
    }

    /********************
        Var
      ********************/

    var ctx = canvas.getContext('2d');
    var X = canvas.width = window.innerWidth;
    var Y = canvas.height = window.innerHeight;
    var mouseX = X / 2;
    var mouseY = Y / 2;
    var shapes = [];
    var shapeNum = 360;
    var shapeMax = 70;
    var xRatio = 2;
    var yRatio = 4;
    var zRatio = 1.5;

    if (X < 768) {
      shapeMax = 35;
      xRatio = 3;
      yRatio = 1;
      zRatio = 2;
    }

    /********************
        Animation
      ********************/

    window.requestAnimationFrame =
    window.requestAnimationFrame ||
    window.mozRequestAnimationFrame ||
    window.webkitRequestAnimationFrame ||
    window.msRequestAnimationFrame ||
    function (cb) {
      setTimeout(cb, 17);
    };

    /********************
         Shape
       ********************/

    function Shape(ctx, x, y, i) {
      this.ctx = ctx;
      this.init(x, y, i);
    }

    Shape.prototype.init = function (x, y, i) {
      this.x = x;
      this.y = y;
      this.r = rand(5, shapeMax);
      this.ir = this.r / 2;
      this.i = i;
      this.v = {
        x: 0,
        y: 0 };

      this.a = i;
      this.rad = this.a * Math.PI / 180;
      this.rx = rand(Y / 15, Y / xRatio);
      this.ry = rand(X / yRatio, X / zRatio);
      this.ga = Math.random() * Math.random();
    };

    Shape.prototype.draw = function () {
      var ctx = this.ctx;
      ctx.save();
      ctx.fillStyle = 'white';
      ctx.globalAlpha = this.ga;
      ctx.translate(this.x, this.y);
      ctx.rotate(-90 * Math.PI / 180);
      ctx.translate(-this.x, -this.y);
      ctx.beginPath();
      ctx.arc(
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