js 连线小球代码
作者：互联网
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<canvas id="bg" style="width: 100%;height: 100%;">
</canvas>
</body>
</html>
<script>
const X = 'x';
const Y = 'y';
const V_X = 'vx';
const MASS = 'm';
const V_Y = 'vy';
const CIRCLE = 360;
const COUNT = 300;
const COLOR_P = '#0088ff';
const COLOR_L = '#0088ff22';
function initFireFly() {
var ret = {}
ret[X] = Math.random() * screen.width;
ret[Y] = Math.random() * screen.height;
ret[V_X] = (Math.random() - .5) * 5;
ret[V_Y] = (Math.random() - .5) * 5;
ret[MASS] = Math.random() * 2.5 + .5;
return ret;
};
var list = [];
var canvas = document.getElementById('bg');
for (var i = 0; i < COUNT; i++) {
list.push(initFireFly());
}
function run() {
for (var i = 0; i < COUNT; i++) {
list[i][X] += list[i][V_X];
list[i][Y] += list[i][V_Y];
if (list[i][X] > screen.width) {
list[i][X] -= (list[i][X] - screen.width) * 2;
list[i][V_X] *= -1;
} else if (list[i][X] < 0) {
list[i][X] += list[i][X] * -2;
list[i][V_X] *= -1;
}
if (list[i][Y] > screen.height) {
list[i][Y] -= (list[i][Y] - screen.height) * 2;
list[i][V_Y] *= -1;
} else if (list[i][Y] < 0) {
list[i][Y] += list[i][Y] * -2;
list[i][V_Y] *= -1;
}
}
for (var i = 0; i < COUNT; i++) {
var cont = canvas.getContext('2d');
cont.beginPath();
cont.moveTo(list[i][X], list[i][Y]);
cont.lineWidth = 1;
cont.strokeStyle = COLOR_P;
cont.lineTo(list[i][X] + 1, list[i][Y] + 1);
for (var i1 = i + 1; i1 < COUNT; i1++) {
if (Math.sqrt(Math.pow((list[i][X] - list[i1][X]), 2) + Math.pow((list[i][Y] - list[i1][Y]), 2)) < 90) {
cont.strokeStyle = COLOR_L;
cont.lineTo(list[i1][X] + 1, list[i1][Y] + 1);
}
}
cont.stroke();
}
}
setInterval(function () {
canvas.setAttribute('width', screen.width);
canvas.setAttribute('height', screen.height);
run();
}, 25)
</script>
标签：const,连线,小球,screen,list,js,var,cont,Math 来源： https://blog.csdn.net/dscn15848078969/article/details/114241819