js实现大风车和泡泡交互动画效果-html代码-BFW代码库

js实现大风车和泡泡交互动画效果

代码语言：html

所属分类：动画

代码描述：js实现大风车和泡泡交互动画效果

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>
* {
  font-family: 'arial black', Helvetica, verdana, monospace, sans-serif;
  letter-spacing: 0.2rem;
  margin: 0;
  padding: 0;
  color: #FFF;
  overflow: hidden;
}

body {
  position: relative;
}

canvas#canvas {
  display: block;
  background: #ABE7FF;
}
</style>

</head>
<body translate="no">
<canvas id="canvas">Canvas not supported.</canvas>

<script>
/*
* File Name / pinwheel.js
* Created Date / Aug 14, 2020
* Aurhor / Toshiya Marukubo
* Twitter / https://twitter.com/toshiyamarukubo
*/

(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 bubbles = [];
    var bubbleNum = 150;
    var shapes = [];
    var rad = Math.PI * 2 / 4;
    var style = {
      black: 'black',
      white: 'white',
      lineWidth: 4 };


    if (X < 768) {
      bubbleNum = 100;
    }

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

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

    /********************
         Bubble
       ********************/

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

    Bubble.prototype.init = function (x, y) {
      this.x = x;
      this.y = y;
      this.r = rand(20, 50);
      this.ga = Math.random() * Math.random() * Math.random();
      this.v = {
        x: rand(-1, 1) * Math.random() * Math.random(),
        y: Math.random() };

      this.random = Math.random();
      this.a = rand(0, 360);
      this.rad = this.a * Math.PI / 180;
      this.as = rand(0, 360) * Math.PI / 180;
    };

    Bubble.prototype.draw = function () {
      var ctx = this.ctx;
      ctx.save();
      ctx.fillStyle = 'white';
      ctx.strokeStyle = 'white';
      ctx.lineCap = 'round';
      ctx.lineWidth = this.r / 4;
      ctx.globalAlpha = this.ga;
      ctx.translate(this.x, this.y);
      ctx.rotate(this.rad);
      ctx.translate(-this.x, -this.y);
      ctx.beginPath();
      ctx.arc(this.x, this.y, this.r, 0, Math.PI * 2, false);
      ctx.fill();
      ctx.globalAlpha = this.ga * 1.1;
      ctx.beginPath();
      ctx.arc(this.x, this.y, this.r * 0.7, this.as, this.as + 1, false);
      ctx.stroke();
      ctx.restore();
    };

    Bubble.prototype.updatePosition = function () {
      if (this.y > Y - Y / 3) {
        this.v.x += 0.1;
        this.v.y -= 0.01;
      }
      this.x += this.v.x;
      this.y += this.v.y;
    };

    Bubble.prototype.updateParams = function (i) {
      this.a += this.random;
      this.rad = this.a * Math.PI / 180;
    };

    Bubble.prototype.wrapPosition = function () {
      if (this.x > X + this.r / 2) {
        this.init(rand(0, X), rand(0 - Y / 5, 0));
      }
    };

    Bubble.prototype.render = function (i) {
      this.updateParams(i);
      this.updatePosition();
      this.wrapPosition();
      this.draw();
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