jquery实现canvas水母跟随鼠标动画效果代码-html代码-BFW代码库

jquery实现canvas水母跟随鼠标动画效果代码

代码语言：html

所属分类：动画

代码描述：jquery实现canvas水母跟随鼠标动画效果代码

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">
<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/jquery-3.2.1.min.js"></script>
<style>
body {
  background: #333;
}

canvas {
  background: black;
}</style>
</head>
<body>
<script>
var App = {};

jQuery(document).ready(function() {
  // Setup canvas and app
  App.setup();
  // Launch animation loop
  App.frame = function() {
    App.update();
    window.requestAnimationFrame(App.frame);
  };
	App.frame();
  
  jQuery('canvas#ourCanvas').on('click', function(event) {
    App.hasUserClicked = !App.hasUserClicked;
  });
  
  jQuery('canvas#ourCanvas').on('mousemove', function(event) {
    App.target.x = event.pageX;
    App.target.y = event.pageY;
  });
});

App.setup = function() {
  // Setup canvas and get canvas context
  var canvas = document.createElement('canvas');
  canvas.height = window.innerHeight;
  canvas.width = window.innerWidth;
  canvas.id = 'ourCanvas';
  document.body.appendChild(canvas);
  this.ctx = canvas.getContext('2d');
  this.width = canvas.width;
  this.height = canvas.height;
  
  // Define a few useful elements
  this.stepCount = 0;
  this.hasUserClicked = false;
  this.xC = canvas.width / 2;
  this.yC = canvas.height / 2;
  this.target = {
    x: this.xC,
    y: this.yC,
    radius: 20
  };
  this.armsPop = 20;
  this.particlesPerArm = 15;
  
  // Create initial targets and arms
  this.arms = [];
  for (var i = 0; i < this.armsPop; i++) {
    this.arms.push([]);
  }
  // Fill initial arms
  this.initialBirth();
  
  // Some forces
  this.gravity = -1;
  this.springStiffness = 0.5;
  this.viscosity = 0.1;
  this.isElastic = false;
};
App.initialBirth = function() {
  for (var armIndex = 0; armIndex < this.arms.length; armIndex++) {
    var arm = this.arms[armIndex];
    var particlesNb = 20 + Math.ceil(20 * Math.random());
    for (var i = 0; i < particlesNb; i++) {
      var x = this.width * Math.random();
      var y = this.height * Math.random();
      var particle = {
        x: x,
        y: y,
        xLast: x,
        yLast: y,
.........完整代码请登录后点击上方下载按钮下载查看