gsap实现canvas随机圈圈排列出现动画效果代码-html代码-BFW代码库

gsap实现canvas随机圈圈排列出现动画效果代码

代码语言：html

所属分类：动画

代码描述：gsap实现canvas随机圈圈排列出现动画效果代码

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 lang="en" >

<head>

  <meta charset="UTF-8">

  
<style>
canvas {
	display: block;
	cursor: pointer;
}
</style>


</head>

<body >
  <canvas></canvas>

  <script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/gsap.3.10.1.js"></script>
      <script >

const MAX_CIRCLE_COUNT = 200
const MAX_ATTEMPT_COUNT = 10
const SF_MAX_RADIUS = 0.2

//
// main
//

let ctx
let ref
let tween

const canvas = document.querySelector('canvas')
const circles = [] // [x,y,r,rx,ry][]

function init() {
  canvas.width = innerWidth
  canvas.height = innerHeight
  ref = Math.min(canvas.width, canvas.height) / 2.5
  ctx = canvas.getContext('2d')
  ctx.translate(canvas.width / 2, canvas.height / 2)
  set_circles()
  tween?.kill()
  tween = gsap.from(circles, {
    0: 0, 1: 0, 2: 0,
    stagger: { amount: 2.5 },
    ease: 'bounce',
    onUpdate: () => {
      ctx.clearRect(-canvas.width / 2, -canvas.height / 2, canvas.width, canvas.height)
      circles.forEach(draw_circle)
    }
  })
}

function set_circles() {
  circles.length = 0
  for (let i = 0; i < MAX_CIRCLE_COUNT; ++i) {
    const circle = spawn()
    circle && circles.push(circle)
  }
}

const dist = (c0, c1) => .........完整代码请登录后点击上方下载按钮下载查看