download:GO进级训练营业

var Direction = new function () {
    this.UP = 38;
    this.RIGHT = 39;
    this.DOWN = 40;
    this.LEFT = 37;
};


var Common = new function () {
    this.width = 20; /* */
    this.height = 20; /* */
    this.speed = 250; /*   */
    this.workThread = null;
};


var Main = new function () {
    var control = new Control();
    window.onload = function () {
    control.Init("pannel");
        /* */
        document.getElementById("btnStart").onclick = function () {
            control.Start();
            this.disabled = true;
            document.getElementById("selSpeed").disabled = true;
            document.getElementById("selSize").disabled = true;
        };
        /* */
        document.getElementById("selSpeed").onchange = function () {
            Common.speed = this.value;
        }
        /* */
        document.getElementById("selSize").onchange = function () {
            Common.width = this.value;
            Common.height = this.value;
            control.Init("pannel");
        }
    };
};
/* */
function Control() {
    this.snake = new Snake();
    this.food = new Food();
    /* ， */
        this.Init = function (pid) {
        var html = [];
        html.push("");
        for (var y = 0; y < Common.height; y++) {
            html.push("");
            for (var x = 0; x < Common.width; x++) {
                html.push('');
            }
            html.push("");
        }
        html.push("");
        this.pannel = document.getElementById(pid);
        this.pannel.innerHTML = html.join("");
    };
    /*  -  、 、 */
    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);
    };
}


/* */
function Snake() {
    this.isDone = false;
    this.dir = Direction.RIGHT;
    this.pos = new Array(new Position());
    /*  -  ， ， ( )*/
    this.Move = function () {
        document.getElementById("box_" + this.pos[0].X + "_" + this.pos[0].Y).className = "";
    //   
        for (var i = 0; i < this.pos.length - 1; i++) {
            this.pos[i].X = this.pos[i + 1].X;
            this.pos[i].Y = this.pos[i + 1].Y;
        }
    // 
        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;
        // ， 
        for (var i = 0; i < this.pos.length; i++) {
            var isExits = false;
            for (var j = i + 1; j < this.pos.length; 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();
                    /* */
                    break; 
                }
                var obj = document.getElementById("box_" + this.pos[i].X + "_" + this.pos[i].Y);
                if (obj) obj.className = "snake"; 
                else { 
                    this.Over();
                    /* */
                    break; 
                }
        }
            this.isDone = true;
    };
    /* */
    this.Over = function () {
        clearInterval(Common.workThread);
        alert(" ！");
        location.reload();
    }
/* */
    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);
        }
    };
    /* */
    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;
        }
    };
}
/* */
function Food() {
    this.pos = new Position();
    /*  -  */
        this.Create = function (pos) {
            document.getElementById("box_" + this.pos.X + "_" + this.pos.Y).className = "";
            var x = 0, y = 0, isCover = false;
            /* */
            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 < pos.length; 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;
}