"Front end" uses JavaScript to achieve the effect of a ball pool

Ballpool

Using JavaScript to achieve the effect of a ball pool, the implementation of the effect is as follows:

Motion diagram:

：

HTML code:

<! DOCTYPE html>
　　
CSS code:
body {  margin:0;  Overflow:hidden;  Color:rgba (255,255,255,.5);  font-family:arial;  Font-size:3em;  font-family: ' Young circle ';  Color: #fff;  text-shadow:1px 1px 10px #000;  Position:relative;} Canvas {  background: #dbdbdb;}. Instructions {  position:absolute;  width:100%;} #title {  display:inline-block;;  border:2px solid transparent;  box-shadow:1px 1px 20px #000;  width:100%;  Margin:auto;  padding:  3px 0 3px 0;  Text-align:center;  Background:inherit;  opacity:0.8;  position:fixed;  Cursor:none;  border-radius:0 0 20px 20px;}
　　
JavaScript code:
Initialize//*******************const userdefined = {gravity:10, friction:., ballsize:65, wall Friction:. 5, distribution:10, spread:10}const colours = [' 0xf20053 ', ' 0xfffc00 ', ' 0x0070ff ', ' 0x00ffff ', ' 0x00f F00 ', ' 0xffb2aa ']const colourslength = colours.length;const Halfspread = Userdefined.spread/2;var mouse = {X:0,y:0};var Oldmouse = {X:0,y:0};var balls = [];//*******************//image//*******************const pixeltexture = PIXI. Texture.fromimage (' Data:image/png;base64, Ivborw0kggoaaaansuheugaaadiaaaaycayaaaaep4ixaaaagxrfwhrtb2z0d2fyzqbbzg9izsbjbwfnzvjlywr5ccllpaaaayzpvfh0we1momnvbs5hzg9iz s54bxaaaaaaadw/ehbhy2tldcbizwdpbj0i77u/iibpzd0ivzvnme1wq2voauh6cmvtek5uy3pryzlkij8+ Idx4onhtcg1ldgegeg1sbnm6ed0iywrvymu6bnm6bwv0ys8iihg6eg1wdgs9ikfkb2jlifhnucbdb3jliduuni1jmdy3idc5lje1nzc0nywgmjaxns8wmy8zm C0ymzo0mdo0miagicagicagij4gphjkzjpsreygeg1sbnm6cmrmpsjodhrwoi8vd3d3lnczlm9yzy8xotk5lzaylziylxjkzi1zew50yxgtbnmjij4gphjkzj Pezxnjcmlwdglvbibyzgy6ywjvdxq9iiigeg1sbnm6eg1wpsjodhrwoi8vbnmuywrvymuuy29tl3hhcc8xljaviib4bwxuczp4bxbntt0iahr0cdovl25zlmfkb2jllmnvbs94yxavms4wl21tlyigeg1sbnm 6c3rszwy9imh0dha6ly9ucy5hzg9izs5jb20vegfwlzeumc9zvhlwzs9szxnvdxjjzvjlzimiihhtcdpdcmvhdg9yvg9vbd0iqwrvymugughvdg9zag9wiend Idiwmtugkfdpbmrvd3mpiib4bxbnttpjbnn0yw5jzulepsj4bxauawlkoji5ndk2murfnuu4mjexrtdcrta2oufemeffnui1rtzdiib4bxbnttpeb2n1bwvud 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{width:window.innerWidth, height:window.innerheight}//******* Set pixi//*******************const app = new Pixi. Application (Windowdimensions.width, Windowdimensions.height, {antialias:true, transparent:true});d ocument.body.a Ppendchild (App.view);//*******************//dom//*******************$ (window). On (' Resize ', function () {Windowdim Ensions = {width:window.innerWidth, height:window.innerHeight} app.renderer.resize (Windowdimensions.width,  Windowdimensions.height); }); $ (window). On (' MouseMove touchmove ', function (e) {mouse = {x:e.originalevent.touches? e.originalevent.touches[0 ].pagex:e.pagex, y:e.originalevent.touches? E.originalevent.touches[0].pagey:e.pagey,} for (Let i = 0, length = math.random () *userdefined.distribution; i < Length i++) {Createball (mouse.x, Mouse.y, (mouse.x-oldmouse.x) *math.random (), (mouse.y-oldMOUSE.Y) *math.random ());  } Oldmouse = {x:mouse.x, y:mouse.y}});//*******************//Create Ball//*******************function Createball (x, Y, XV, YV) {var ball = new PIXI.    Sprite (pixeltexture);    ball.x = x;    Ball.y = y;    Ball.width = Ball.height = Userdefined.ballsize;    BALL.XV = XV + (-halfspread+math.random () *userdefined.spread);    Ball.yv = YV + (-halfspread+math.random () *userdefined.spread);    Ball.tint = Colours[math.floor (Math.random () *colourslength)];      Balls.push (ball);    App.stage.addChild (ball); }//*******************//Start window//*******************settimeout (function () {for "Let i = 0, length = Userdefined.distrib ution*100; i < length; i++) {Createball (Math.random () *windowdimensions.width, Math.random () * (-windowdimensions.height), 5 +math.random () *10, -5+math.random () *10)}}, 2500);//******************//Ball Motion Cycle//****************** (function lo OP () {for (Let i = 0, length = balls.length; i < lenGth    i++) {//Mobile balls[i].x + = BALLS[I].XV;         Balls[i].y + = balls[i].yv+userdefined.gravity;    BALLS[I].XV *= userdefined.friction by friction deceleration;        Balls[i].yv *= userdefined.friction;          Prohibit out-of-bounds if (balls[i].x <= 0) {balls[i].x = 0; } else if (balls[i].x >= windowdimensions.width-userdefined.ballsize) {balls[i].x = Windowdimensions.width-userde          Fined.ballsize;       }//Bounce off if (balls[i].x <= 0 | | balls[i].x >= windowdimensions.width-userdefined.ballsize) {//Invert            Balls[i].xv*=-1;    Deceleration balls[i].xv *= userdefined.wallfriction;  }}//Clear for (Let i = 0, length = balls.length; i < length; i++) {if (balls[i].y >= windowdimensions.height)       {App.stage.removeChild (balls[i]);      Balls.splice (i, 1);     length--; }}//Run Requestanimationframe (loop) again;}) ();
　　
"Front end" uses JavaScript to achieve the effect of a ball pool