<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>黑洞: 事件视界</title>
<style>
html, body {
background-color: black;
}</style>
</head>
<body>
<script>
"use strict";var _slicedToArray = function () {function sliceIterator(arr, i) {var _arr = [];var _n = true;var _d = false;var _e = undefined;try {for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {_arr.push(_s.value);if (i && _arr.length === i) break;}} catch (err) {_d = true;_e = err;} finally {try {if (!_n && _i["return"]) _i["return"]();} finally {if (_d) throw _e;}}return _arr;}return function (arr, i) {if (Array.isArray(arr)) {return arr;} else if (Symbol.iterator in Object(arr)) {return sliceIterator(arr, i);} else {throw new TypeError("Invalid attempt to destructure non-iterable instance");}};}();var _createClass = function () {function defineProperties(target, props) {for (var i = 0; i < props.length; i++) {var descriptor = props[i];descriptor.enumerable = descriptor.enumerable || false;descriptor.configurable = true;if ("value" in descriptor) descriptor.writable = true;Object.defineProperty(target, descriptor.key, descriptor);}}return function (Constructor, protoProps, staticProps) {if (protoProps) defineProperties(Constructor.prototype, protoProps);if (staticProps) defineProperties(Constructor, staticProps);return Constructor;};}();function _toConsumableArray(arr) {if (Array.isArray(arr)) {for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) {arr2[i] = arr[i];}return arr2;} else {return Array.from(arr);}}function _classCallCheck(instance, Constructor) {if (!(instance instanceof Constructor)) {throw new TypeError("Cannot call a class as a function");}}var
PI = Math.PI,cos = Math.cos,sin = Math.sin,abs = Math.abs,sqrt = Math.sqrt,pow = Math.pow,floor = Math.floor,round = Math.round,random = Math.random,atan2 = Math.atan2;
var HALF_PI = 0.5 * PI;
var TAU = 2 * PI;
var rand = function rand(n) {return n * random();};
var randIn = function randIn(min, max) {return rand(max - min) + min;};
var fadeOut = function fadeOut(t, m) {return (m - t) / m;};
var fadeInOut = function fadeInOut(t, m) {
var hm = 0.5 * m;
return abs((t + hm) % m - hm) / hm;
};
var dist = function dist(x1, y1, x2, y2) {return sqrt(pow(x2 - x1, 2) + pow(y2 - y1, 2));};
var angle = function angle(x1, y1, x2, y2) {return atan2(y2 - y1, x2 - x1);};
var lerp = function lerp(n1, n2, speed) {return (1 - speed) * n1 + speed * n2;};
