JS写的贪吃蛇游戏(个人练习)_javascript技巧

JS贪吃蛇游戏，个人练习之用，放在这备份一下，

复制代码 代码如下:

JS贪吃蛇-练习 #pannel table { border-collapse: collapse; } #pannel table td { border: 1px solid #808080; width: 10px; height: 10px; font-size: 0; line-height: 0; overflow: hidden; } #pannel table .snake { background-color: green; } #pannel table .food { background-color: blue; } var Direction = new function () { this.UP = 38; this.RIGHT = 39; this.DOWN = 40; this.LEFT = 37; }; var Common = new function () { this.width = 20; /*水平方向方格数*/ this.height = 20; /*垂直方向方格数*/ this.speed = 250; /*速度 值越小越快*/ this.workThread = null; }; var Main = new function () { var control = new Control(); window.onload = function () { control.Init("pannel"); /*开始按钮*/ document.getElementById("btnStart").onclick = function () { control.Start(); this.disabled = true; document.getElementById("selSpeed").disabled = true; document.getElementById("selSize").disabled = true; }; /*调速度按钮*/ document.getElementById("selSpeed").onchange = function () { Common.speed = this.value; } /*调大小按钮*/ document.getElementById("selSize").onchange = function () { Common.width = this.value; Common.height = this.value; control.Init("pannel"); } }; }; /*控制器*/ function Control() { this.snake = new Snake(); this.food = new Food(); /*初始化函数，创建表格*/ this.Init = function (pid) { var html = []; html.push(" "); for (var y = 0; y html.push(" "); for (var x = 0; x html.push(' '); } html.push(""); } html.push(""); this.pannel = document.getElementById(pid); this.pannel.innerHTML = html.join(""); }; /*开始游戏 - 监听键盘、创建食物、刷新界面线程*/ this.Start = function () { var me = this; this.MoveSnake = function (ev) { var evt = window.event || ev; me.snake.SetDir(evt.keyCode); }; try { document.attachEvent("onkeydown", this.MoveSnake); } catch (e) { document.addEventListener("keydown", this.MoveSnake, false); } this.food.Create(); Common.workThread = setInterval(function () { me.snake.Eat(me.food); me.snake.Move(); }, Common.speed); }; } /*蛇*/ function Snake() { this.isDone = false; this.dir = Direction.RIGHT; this.pos = new Array(new Position()); /*移动 - 擦除尾部，向前移动，判断游戏结束(咬到自己或者移出边界)*/ this.Move = function () { document.getElementById("box_" + this.pos[0].X + "_" + this.pos[0].Y).className = ""; //所有 向前移动一步 for (var i = 0; i this.pos[i].X = this.pos[i + 1].X; this.pos[i].Y = this.pos[i + 1].Y; } //重新设置头的位置 var head = this.pos[this.pos.length - 1]; switch (this.dir) { case Direction.UP: head.Y--; break; case Direction.RIGHT: head.X++; break; case Direction.DOWN: head.Y++; break; case Direction.LEFT: head.X--; break; } this.pos[this.pos.length - 1] = head; //遍历画蛇，同时判断游戏结束 for (var i = 0; i var isExits = false; for (var j = i + 1; j if (this.pos[j].X == this.pos[i].X && this.pos[j].Y == this.pos[i].Y) { isExits = true; break; } if (isExits) { this.Over();/*咬自己*/ break; } var obj = document.getElementById("box_" + this.pos[i].X + "_" + this.pos[i].Y); if (obj) obj.className = "snake"; else { this.Over();/*移出边界*/ break; } } this.isDone = true; }; /*游戏结束*/ this.Over = function () { clearInterval(Common.workThread); alert("游戏结束！"); } /*吃食物*/ this.Eat = function (food) { var head = this.pos[this.pos.length - 1]; var isEat = false; switch (this.dir) { case Direction.UP: if (head.X == food.pos.X && head.Y == food.pos.Y + 1) isEat = true; break; case Direction.RIGHT: if (head.Y == food.pos.Y && head.X == food.pos.X - 1) isEat = true; break; case Direction.DOWN: if (head.X == food.pos.X && head.Y == food.pos.Y - 1) isEat = true; break; case Direction.LEFT: if (head.Y == food.pos.Y && head.X == food.pos.X + 1) isEat = true; break; } if (isEat) { this.pos[this.pos.length] = new Position(food.pos.X, food.pos.Y); food.Create(this.pos); } }; /*控制移动方向*/ this.SetDir = function (dir) { switch (dir) { case Direction.UP: if (this.isDone && this.dir != Direction.DOWN) { this.dir = dir; this.isDone = false; } break; case Direction.RIGHT: if (this.isDone && this.dir != Direction.LEFT) { this.dir = dir; this.isDone = false; } break; case Direction.DOWN: if (this.isDone && this.dir != Direction.UP) { this.dir = dir; this.isDone = false; } break; case Direction.LEFT: if (this.isDone && this.dir != Direction.RIGHT) { this.dir = dir; this.isDone = false; } break; } }; } /*食物*/ function Food() { this.pos = new Position(); /*创建食物 - 随机位置创建立*/ this.Create = function (pos) { document.getElementById("box_" + this.pos.X + "_" + this.pos.Y).className = ""; var x = 0, y = 0, isCover = false; /*排除蛇的位置*/ do { x = parseInt(Math.random() * (Common.width - 1)); y = parseInt(Math.random() * (Common.height - 1)); isCover = false; if (pos instanceof Array) { for (var i = 0; i if (x == pos[i].X && y == pos[i].Y) { isCover = true; break; } } } } while (isCover); this.pos = new Position(x, y); document.getElementById("box_" + x + "_" + y).className = "food"; }; } function Position(x, y) { this.X = 0; this.Y = 0; if (arguments.length >= 1) this.X = x; if (arguments.length >= 2) this.Y = y; }

20*20 30*30 40*40 速度-慢 速度-中 速度-快

JS写的贪吃蛇游戏(个人练习)_javascript技巧

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