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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>俄罗斯方块</title>
<style type="text/css">
.c {
margin: 1px;
width: 19px;
height: 19px;
background: red;
position: absolute;
}
.d {
margin: 1px;
width: 19px;
height: 19px;
background: gray;
position: absolute;
}
.f {
top: 0px;
left: 0px;
background: black;
position: absolute;
}
.e {
top: 0px;
background: #151515;
position: absolute;
}
.g {
width: 100px;
height: 20px;
color: white;
position: absolute;
}
</style>
<script type="text/javascript">
var row = 18;
var col = 10;
var announcement = 6;
var size = 20;
var isOver = false;
var shapes = ("0,1,1,1,2,1,3,1;1,0,1,1,1,2,2,2;2,0,2,1,2,2,1,2;0,1,1,1,1,2,2,2;1,2,2,2,2,1,3,1;1,1,2,1,1,2,2,2;0,2,1,2,1,1,2,2").split(";");
var tetris;
var container;
function createElm(tag, css) {
var elm = document.createElement(tag);
elm.className = css;
document.body.appendChild(elm);
return elm;
}
function Tetris(css, x, y, shape) {
// 创建4个div用来组合出各种方块
var myCss = css ? css : "c";
this.divs = [createElm("div", myCss), createElm("div", myCss), createElm("div", myCss), createElm("div", myCss)];
if (!shape) {
this.divs2 = [createElm("div", myCss), createElm("div", myCss), createElm("div", myCss), createElm("div", myCss)];
this.score = createElm("div", "g");
this.score.style.top = 10 * size + "px";
this.score.style.left = (col - -1) * size + "px";
this.score.innerHTML = "score:0";
}
this.container = null;
this.refresh = function() {
this.x = (typeof(x) != 'undefined') ? x : 3;
this.y = (typeof(y) != 'undefined') ? y : 0;
// 如果有传参，优先使用参数的，如果有预告，优先使用预告，都没有就自己生成
if (shape)
this.shape = shape;
else if (this.shape2)
this.shape = this.shape2;
else
this.shape = shape ? shape : shapes[Math.floor((Math.random() * shapes.length - 0.000000001))].split(",");
this.shape2 = shapes[Math.floor((Math.random() * shapes.length - 0.000000001))].split(",");
if (this.container && !this.container.check(this.x, this.y, this.shape)) {
isOver = true;
alert("游戏结束");
} else {
this.show();
this.showScore();
this.showAnnouncement();
}
}
// 显示方块
this.show = function() {
for (var i in this.divs) {
this.divs[i].style.top = (this.shape[i * 2 + 1] - -this.y) * size + "px";
this.divs[i].style.left = (this.shape[i * 2] - -this.x) * size + "px";
}
}
// 显示预告
this.showAnnouncement = function() {
for (var i in this.divs2) {
this.divs2[i].style.top = (this.shape2[i * 2 + 1] - -1) * size + "px";
this.divs2[i].style.left = (this.shape2[i * 2] - -1 - -col) * size + "px";
}
}
// 显示分数
this.showScore = function() {
if (this.container && this.score) {
this.score.innerHTML = "score:" + this.container.score;
}
}
// 水平移动方块的位置
this.hMove = function(step) {
if (this.container.check(this.x - -step, this.y, this.shape)) {
this.x += step;
this.show();
}
}
// 垂直移动方块位置
this.vMove = function(step) {
if (this.container.check(this.x, this.y - -step, this.shape)) {
this.y += step;
this.show();
} else {
this.container.fixShape(this.x, this.y, this.shape);
this.container.findFull();
this.refresh();
}
}
// 旋转方块
this.rotate = function() {
var newShape = [this.shape[1], 3 - this.shape[0], this.shape[3], 3 - this.shape[2], this.shape[5], 3 - this.shape[4], this.shape[7], 3 - this.shape[6]];
if (this.container.check(this.x, this.y, newShape)) {
this.shape = newShape;
this.show();
}
}
this.refresh();
}
function Container() {
this.init = function() {
// 绘制方块所在区域
var bgDiv = createElm("div", "f");
bgDiv.style.width = size * col + "px";
bgDiv.style.height = size * row + "px";
// 绘制预告所在区域
var bgDiv = createElm("div", "e");
bgDiv.style.left = size * col + "px";
bgDiv.style.width = size * announcement + "px";
bgDiv.style.height = size * row + "px";
// 清空积分
this.score = 0;
}
this.check = function(x, y, shape) {
// 检查边界越界
var flag = false;
var leftmost = col;
var rightmost = 0;
var undermost = 0;
for (var i = 0; i < 8; i += 2) {
// 记录最左边水平坐标
if (shape[i] < leftmost)
leftmost = shape[i];
// 记录最右边水平坐标
if (shape[i] > rightmost)
rightmost = shape[i];
// 记录最下边垂直坐标
if (shape[i + 1] > undermost)
undermost = shape[i + 1];
// 判断是否碰撞
if (this[(shape[i + 1] - -y) * 100 - -(shape[i] - -x)])
flag = true;
}
// 判断是否到达极限高度
for (var m = 0; m < 3; m++)
for (var n = 0; n < col; n++)
if (this[m * 100 + n])
flag = true;
if ((rightmost - -x + 1) > col || (leftmost - -x) < 0 || (undermost - -y + 1) > row || flag)
return false;
return true;
}
// 用灰色方块替换红色方块，并在容器中记录灰色方块的位置
this.fixShape = function(x, y, shape) {
var t = new Tetris("d", x, y, shape);
for (var i = 0; i < 8; i += 2)
this[(shape[i + 1] - -y) * 100 - -(shape[i] - -x)] = t.divs[i / 2];
}
// 遍历整个容器，判断是否可以消除
this.findFull = function() {
var s = 0;
for (var m = 0; m < row; m++) {
var count = 0;
for (var n = 0; n < col; n++)
if (this[m * 100 + n])
count++;
if (count == col) {
s++;
this.removeLine(m);
}
}
this.score -= -this.calScore(s);
}
this.calScore = function(s) {
if (s != 0)
return s - -this.calScore(s - 1)
else
return 0;
}
// 消除指定一行方块
this.removeLine = function(row) {
// 移除一行方块
for (var n = 0; n < col; n++)
document.body.removeChild(this[row * 100 + n]);
// 把所消除行上面所有的方块下移一行
for (var i = row; i > 0; i--) {
for (var j = 0; j < col; j++) {
this[i * 100 - -j] = this[(i - 1) * 100 - -j]
if (this[i * 100 - -j])
this[i * 100 - -j].style.top = i * size + "px";
}
}
}
}
function init() {
container = new Container();
container.init();
tetris = new Tetris();
tetris.container = container;
document.onkeydown = function(e) {
if (isOver) return;
var e = window.event ? window.event : e;
switch (e.keyCode) {
case 38: //up
tetris.rotate();
break;
case 40: //down
tetris.vMove(1);
break;
case 37: //left
tetris.hMove(-1);
break;
case 39: //right
tetris.hMove(1);
break;
}
}
setInterval("if(!isOver) tetris.vMove(1)", 500);
}
</script>
</head>
<body onload="init()">
</body>
</html>
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