原生js实现摩天轮旋转动画效果-html代码-BFW代码库

代码语言：html

所属分类：动画

代码描述：原生js实现摩天轮旋转动画效果

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;
  font-size: 1rem;
}

canvas#canvas {
  display: block;
  background: #000;
  background: #1a2a6c;  /* fallback for old browsers */
  background: -webkit-linear-gradient(to top, #fdbb2d, #b21f1f, #1a2a6c);  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to top, #fdbb2d, #b21f1f, #1a2a6c); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}

ul#navigation {
  display: none;
}

@media screen and (min-width: 48rem) {

  ul#navigation {
    display: block;
    position: absolute;
    height: 100%;
    top: 0;
    right: 0;
    -webkit-writing-mode: vertical-rl;
        -ms-writing-mode: tb-rl;
            writing-mode: vertical-rl;
    text-align: center;
    margin-right: 1.6rem;
    font-size: 0.8rem;
  }
  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 click.</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 = null;
    var mouseY = null;
    var ferrisWheels = [];
    var ferrisWheelNum = 1;
    var splitNum = 16;
    var splitAn = 360 / splitNum;
    var wheelRadius = 200;
    var baloonMax = 100;

    if (X < 768) {
      wheelRadius = 100;
      baloonMax = 50;
    }

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

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

    /********************
         FerrisWheel
       ********************/

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

    FerrisWheel.prototype.init = function (x, y) {
      this.x = x;
      this.y = y;
      this.r = wheelRadius;
      this.lw = 8;
      this.a = 45;
      this.rad = this.a * Math.PI / 180;
      this.v = {
        x: 0,
        y: 0 };

      this.c = {
        r: rand(1, 1),
        g: rand(1, 1),
        b: rand(1, 1) };

    };

    FerrisWheel.prototype.draw = function () {
      var ctx = this.ctx;
      // base
      ctx.save();
      ctx.lineWidth = this.lw;
      ctx.strokeStyle = 'rgb(' + this.c.r + ', ' + this.c.g + ', ' + this.c.b + ')';
      ctx.beginPath();
      ctx.moveTo(this.x, this.y);
      ctx.lineTo(this.x + this.r, Y);
      ctx.stroke();
      ctx.beginPath();
      ctx.moveTo(this.x, this.y);
      ctx.lineTo(this.x - this.r, Y);
      ctx.stroke();
      ctx.restore();
      // circle
      ctx.save();
      ctx.lineWidth = this.lw;
      ctx.strokeStyle = 'rgb(' + this.c.r + ', ' + this.c.g + ', ' + this.c.b + ')';
      for (var i = 1; i < 3; i++) {
        ctx.beginPath();
        ctx.arc(this.x, this.y, this.r * i, 0, Math.PI * 2, false);
        ctx.stroke();
      }
      ctx.restore();
      // pillar
      ctx.save();
      ctx.lineWidth = this.lw;
      ctx.strokeStyle = 'rgb(' + this.c.r + ', ' + this.c.g + ', ' + this.c.b + ')';
      ctx.translate(this.x, this.y);
      ctx.rotate(this.rad);
      ctx.translate(-this.x, -this.y);
      for (var i = 0; i < splitNum; i++) {
        ctx.beginPath();
        ctx.moveTo(this.x, this.y);
        ctx.lineTo(Math.cos(splitAn * Math.PI / 180 * i) * this.r * 3 + this.x, Math.sin(splitAn * Math.PI / 180 * i) * this.r * 3 + this.y);
        ctx.stroke();
      }
      ctx.restore();
      // gondola
      ctx.save();
      ctx.translate(this.x, this.y);
      ctx.rotate(this.rad);
      ctx.translate(-this.x, -this.y);
      for (var i = 0; i < splitNum; i++) {
        ctx.fillStyle = 'rgb(' + this.c.r + ', ' + this.c.g + ', ' + this.c.b + ')';
        ctx.beginPath();
        ctx.arc(Math.cos(splitAn * Math.PI / 180 * i) * this.r * 3 + this.x, Math.sin(splitAn * Math.PI / 180 * i) * this.r * 3 + this.y, this.r / 3, 0, Math.PI * 2, false);
        ctx.fill();
        ctx.fillStyle = 'rgb(' + this.c.r * 50 + ', ' + this.c.g * 50 + ', ' + this.c.b * 50 + ')';
        ctx.beginPath();
        ctx.arc(Math.cos(splitAn * Math.PI / 180 * i) * this.r * 3 + this.x, M.........完整代码请登录后点击上方下载按钮下载查看