A large number of random spheres move in random direction, native JS

Source: Internet
Author: User

<! DOCTYPE html>

<meta charset= "UTF-8" >
<meta name= "viewport" content= "Width=device-width, initial-scale=1.0" >
<meta http-equiv= "x-ua-compatible" content= "Ie=edge" >
<title>balls motions</title>
<style>
* {
margin:0;
padding:0;
}

Body {
WIDTH:100VW;
HEIGHT:100VH;
Background-color: #333;
/* 33~CC, 51~204 */
}

. Ball {
width:100px;
height:100px;
Background: #369;
border-radius:50%;
position:fixed;
}
</style>

<body>
<div id= "desktop" ></div>
<script>
Wide screen height
var maxw = window.innerwidth;
var maxh = window.innerheight;
Dynamic Fetch screen Width high value
function Winfo () {
Maxw = window.innerwidth;
Maxh = Window.innerheight;
}
Window.onresize = Winfo;
Random function
function rand (A, b) {
Return Math.Round (Math.random () * (B-A) + a);
}
var max = 500;
Add a Ball (object) label
var str = (new Array (max + 1)). Join (' <div class= ' ball ' ></div> ');
for (var i = 0; i < max; i++) {
str + = ' <div class= ' ball ' ></div> ';
// }
Document.queryselector (' #desktop '). InnerHTML = str;
Document.queryselector (' #desktop '). InnerHTML =
(New Array (max + 1)). Join (' <div class= ' ball ' ></div> ');
var objs = Document.queryselectorall ('. Ball ');
var balls = [];
Objs.foreach (function (EL) {
var d = rand (5, 20);
Balls.push ({
Obj:el,
D:D,
X:rand (0, maxw-d),
Y:rand (0, maxh-d),
Dx:rand (0, 1)? 1:-1,
Dy:rand (0, 1)? 1:-1,
Sx:rand (2, 10),
Sy:rand (2, 10),
Bg:
"Rgba (" +
Rand (51, 204) + "," +
Rand (51, 204) + "," +
Rand (51, 204) + "," +
Rand (30, 80)/100 + ")"
});
});
Console.log ("All Balls:", balls);
Balls[0].obj.style.left = balls[0].x + ' px ';
Balls[0].obj.style.top = balls[0].y + ' px ';
Balls[0].obj.style.background = balls[0].bg;
Movement
Function Motion () {
Balls.foreach (function (el, index, arr) {
for (var i = 0; i < balls.length; i++) {
var el = balls[i];
el.x + = El.dx * EL.SX;
EL.Y + = El.dy * EL.SY;
if (el.x > Maxw && el.dx > 0) {
el.x =-EL.D;
El.dy = rand (0, 1)? 1:-1;
EL.SX = rand (1, 5);
}
if (el.x < -100 && EL.DX < 0) {
el.x = MAXW;
El.dy = rand (0, 1)? 1:-1;
EL.SX = rand (1, 5);
}
if (El.y > Maxh && el.dy > 0) {
El.y =-EL.D;
EL.DX = rand (0, 1)? 1:-1;
El.sy = rand (1, 5);
}
if (El.y < -100 && El.dy < 0) {
El.y = Maxh;
EL.DX = rand (0, 1)? 1:-1;
El.sy = rand (1, 5);
}
Set appearance
El.obj.style.width = el.d + ' px ';
El.obj.style.height = el.d + ' px ';
El.obj.style.left = el.x + ' px ';
El.obj.style.top = el.y + ' px ';
El.obj.style.background = el.bg;
}
// });
Appointment next time
SetTimeout (motion, 0);
}
Motion ();
</script>
</body>

Random direction of random ball movement, native JS

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.