小编use*_*823的帖子

var canvas = document.getElementById("canvas"),
    ctx = canvas.getContext('2d');

//jupiter's gravity divided by 10 for testing purposes
g = 24.79/10;
canvas.width = window.innerWidth - 50;
canvas.height = window.innerHeight - 22.5;
bounciness = (1/2)
var spawnrate = 16;
var inertia = 0.00075;
var gravity = g/25;
players = []
then = new Date()/1000;
moved = false;
function getPosition(event){
	mouseX = event.clientX;
	mouseY = event.clientY;
	if(moved == false){
		update();
		moved = true;
	}
}
function addCircle(){
    players.push({x: mouseX, y: mouseY, color: '#000000', radius: …