假期写了双人玩的贪吃蛇，纯新手， 欢迎大家拍砖
近期学习js，假期无事，参照网上的代码写了个双人玩的贪吃蛇。
对网上的代码作了些改造,具体如下：
1，把m*n的二维数组变成m*n一维数组，映射关系为：
A[r]------>a[i][j];
i = r%m;
j = (r-r%m)/m;
j<n;
2，对随机数的获取作了些改造，
3，蛇尾总是第一个加入的元素，
代码编写仓促，也没写注释，望各位见谅
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=gb2312"><title>snake</title><script type='text/javascript' >(function(){ if (!window.Snake) window.Snake = {}; Snake = function(container, name){ this.container = container; this.name = '_' + name + '_'; this.dir = 0; this.testDir = 0; this.head = -1; this.run = 0;this.speed=300;this.count={}; if (typeof Snake.prototype._init == 'undefined') { Snake.prototype.control = function(n){ if (Math.abs(this.testDir) == Math.abs(n)) return; this.dir = n; }; Snake.prototype.move = function(){ if (this.container.win) { clearInterval(this.run); return; } var _left = this.head % this.container.width; var _top = (this.head - this.head % this.container.width) / this.container.width; this.dir % this.container.width == 0 ? _top += this.dir / this.container.width : _left += this.dir; if (_left < 0 || _left >= this.container.width || _top < 0 || _top >= this.container.height || (this.container.all[this.head + this.dir] && this.container.all[this.head + this.dir].indexOf(this.name) != -1)) { this.container.win = true;alert(this.name+' lose ~_~'); return; } if (!this.container.all[this.head + this.dir]) { this.container.all[this.head + this.dir] = this.name; var _div = this.getDivByClass(this.name)[0]; this.container.all[parseInt(_div.style.left) / 20 + parseInt(_div.style.top) / 20 * this.container.width] = this.container.all[parseInt(_div.style.left) / 20 + parseInt(_div.style.top) / 20 * this.container.width].replace(this.name, ''); _div.style.left = _left * 20 + 'px'; _div.style.top = _top * 20 + 'px'; this.container.div.appendChild(_div); } else if (this.head + this.dir == this.container.food) { var _div = this.getDivByClass(this.container.foodClass)[0]; _div.className = this.name; this.container.div.appendChild(_div); this.container.createFood(); this.container.all[this.head + this.dir] = this.name; } else { var _str = this.container.all[this.head + this.dir]; var _divs = this.getDivByClass(_str); var _div = _divs[0]; if (_divs.length > 1 && parseInt(_div.style.left) / 20 + parseInt(_div.style.top) / 20 * this.container.width == this.head + this.dir) { this.container.all[this.head + this.dir] = this.name; _div.className = this.name; this.container.div.appendChild(_div); } else { this.container.all[this.head + this.dir] += this.name; var _div = this.getDivByClass(this.name)[0];this.container.all[parseInt(_div.style.left) / 20 + parseInt(_div.style.top) / 20 * this.container.width] = this.container.all[parseInt(_div.style.left) / 20 + parseInt(_div.style.top) / 20 * this.container.width].replace(this.name, ''); _div.style.left = _left * 20 + 'px'; _div.style.top = _top * 20 + 'px'; this.container.div.appendChild(_div); } }var lth=this.getDivByClass(this.name).lengthif(lth>=this.container.bet){this.container.win=true;alert(this.name+' win ^-^');}this.count.innerHTML=this.name+': '+lth.toString(); this.head += this.dir; this.testDir = this.dir; }; Snake.prototype.getDivByClass = function(name){ var _divs = this.container.div.getElementsByTagName('DIV'); var _result = []; for (var i = 0; i < _divs.length; i++) { if (_divs[i].className == name) _result.push(_divs[i]); } return _result; }; Snake.prototype.acc=function(n){return this.speed+n>50? this.speed+n:this.speed;} Snake.prototype.init = function(){ this.head = this.container.getRandom(); this.container.all[this.head] = this.name; var _left = this.head % this.container.width * 20 + 'px'; var _top = (this.head - this.head % this.container.width) / this.container.width * 20 + 'px'; var _div = document.createElement('DIV'); _div.className = this.name; _div.style.left = _left; _div.style.top = _top;this.count=document.createElement('P');this.count.innerHTML=this.name+': 1';this.container.counts.push(this.count); this.container.div.appendChild(_div); } } Snake.prototype._init = true; } if (!window.Container) window.Container = {}; Container = function(width, height, foodClass, bet){ this.width = width; this.height = height; this.food = -1; this.foodClass = '_' + foodClass + '_'; this.bet = bet; this.win = false; this.all = [];this.counts=[]; var _div = document.createElement('DIV'); _div.className = 'container'; //_div.style.position = 'absolute'; _div.style.width = this.width * 20 + 'px'; _div.style.height = this.height * 20 + 'px'; this.div = _div; this.getRandom = function(){ var _remain = []; for (var i = 0; i < width * height; i++) { if (this.all[i]) continue; _remain.push(i); } var _index = Math.floor(Math.random() * _remain.length); return _remain[_index]; } this.createFood = function(){ var _food = this.getRandom(); this.food = _food; this.all[_food] = this.foodClass; var _fDiv = document.createElement('DIV'); _fDiv.className = this.foodClass; var _left = _food % this.width * 20 + 'px'; var _top = (_food - _food % this.width) / this.width * 20 + 'px'; _fDiv.style.left = _left; _fDiv.style.top = _top; this.div.appendChild(_fDiv); } } })();var container = new Container(30, 30, 'food', 20);var snakeA = new Snake(container, 'snakeA');var snakeB = new Snake(container, 'snakeB');function game(){ container.createFood(); snakeA.init(); snakeB.init(); function allcontrol(e){ e = e || window.event; var n = e.keyCode; switch (n) { case 37: snakeA.control(-1); break; case 38: snakeA.control(-container.width); break; case 39: snakeA.control(1); break; case 40: snakeA.control(container.width); break; case 65: snakeB.control(-1); break; case 87: snakeB.control(-container.width); break; case 68: snakeB.control(1); break; case 83: snakeB.control(container.width); break;case 96:if(snakeA.run){clearInterval(snakeA.run);snakeA.speed=snakeA.acc(-50);snakeA.run=setInterval('snakeA.move()',snakeA.acc(-50));}break;case 110:if(snakeA.run){clearInterval(snakeA.run);snakeA.speed=snakeA.acc(20);snakeA.run=setInterval('snakeA.move()',snakeA.acc(50));}break;case 71:if(snakeB.run){clearInterval(snakeB.run);snakeB.speed=snakeB.acc(-20);snakeB.run=setInterval('snakeB.move()',snakeB.acc(-50));}break;case 72:if(snakeB.run){clearInterval(snakeB.run);snakeB.speed=snakeB.acc(20);snakeB.run=setInterval('snakeB.move()',snakeB.acc(50));}break; } if (!snakeA.run && snakeA.dir) snakeA.run = setInterval('snakeA.move()', 300); if (!snakeB.run && snakeB.dir) snakeB.run = setInterval('snakeB.move()', 300); }var _wrap=document.createElement('DIV'); _wrap.appendChild(container.counts[1]); _wrap.appendChild(container.div);_wrap.appendChild(container.counts[0]);document.body.appendChild(_wrap);var des=document.createElement('DIV');des.style.clear='both';des.style.position='relative';des.style.padding='20px';des.innerHTML='snakeA:键盘上↑↓←→代表方向控制，小键盘上0加速，.减速<br/>snakeB:键盘上A W S D代表方向控制，键盘上G加速，H减速<br/>两条蛇可以相互吃掉对方尾部，先吃到20个食物为赢';document.body.appendChild(des); if (document.addEventListener) { document.addEventListener('keydown', allcontrol, false); } else if (document.attachEvent) { document.attachEvent('onkeydown', allcontrol); } }window.onload = game;</script><style type='text/css'>p{float:left;margin:10px;padding:20px;font-weight:bolder;border:1px solid #000;text-align:center;vertical-align:text-bottom;;}.container{position:relative;float:left;margin:10px;padding:0;border:1px solid #000;}._snakeA_{position:absolute;margin:0;padding:0;width:20px;height:20px;border:1px solid #ccc;background-color:red;}._food_{position:absolute;margin:0;padding:0;width:20px;height:20px;border:1px solid #ccc;background-color:green;}._snakeB_{position:absolute;margin:0;padding:0;width:20px;height:20px;border:1px solid #ccc;background-color:#2E2E2E;}</style><script type='text/javascript'></script></head><body ></body></html>