JavaScript， 实现俄罗斯方块小游戏
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>俄罗斯方块</title>
<style type="text/css">
body{ width:530px; background:#F7F7F7; margin:20px auto}
table#gameBoard{ border:1px solid black; border-collapse: collapse; float:left;}
table#gameBoard td{ width:30px; height:30px; border: 1px dotted #0cc;}
div#gameControl{ widows:160; float:right; height: 200px;; line-height: 200px;}
.font{ font-family:'微软雅黑'; font-size:18px; text-align:center;}
div input { width: 60px; height:25px; }
</style>
<script type="text/javascript">
var T = TETRIS = {
aBoardGrids : [],
aShapes: [
[0xCC00],
[0x8888, 0xF00],
[0x8C40, 0x6C00],
[0x4C80, 0xC600],
[0x44C0, 0x8E00, 0xC880, 0xE200],
[0x88C0, 0xE800, 0xC440, 0x2E00],
[0x4E00, 0x8C80, 0xE400, 0x4C40]
], //代表所有方块的形状数
init : function(){
this.oDomBoard = document.getElementById("gameBoard");
this.oDomScore = document.getElementById("score");
this.aBoardGrids = new Array(18);
for (var rows = 0 ; rows < 18 ; rows++){
this.aBoardGrids[rows] = new Array(10);
var oDomTr = this.oDomBoard.insertRow(-1);
for (var cols = 0 ; cols < 10 ; cols++){
this.aBoardGrids[rows][cols] = 0;
oDomTr.insertCell(cols);
}
}
document.onkeydown = function(keyEvent){
keyEvent = keyEvent || window.event;
var ikeyNum = keyEvent.which || keyEvent.keyCode;
switch(ikeyNum){
case 37://←
T.oBlock.move("left");
break;
case 38://↑
T.oBlock.rotate((function (){
var vShape = T.aShapes[T.iShapeIdx][ (++T.index)%T.aShapes[T.iShapeIdx].length];
var sShape = vShape.toString(2);
sShape = new Array(17 - sShape.length).join(0) + sShape;
T.matrix = sShape.match(/\d{4}/g);
return T.matrix;
})()); //变形
break;
case 39://→
T.oBlock.move("right");
break;
case 40://↓
T.oBlock.move("down");
break;
}
}
},
next : function (){
this.iShapeIdx = parseInt(Math.random() * this.aShapes.length);
this.index = 0;
var vShape = this.aShapes[this.iShapeIdx][this.index];
var sShape = vShape.toString(2); //将16进制转换为二进制
sShape = new Array(17 - sShape.length).join(0) + sShape; //不够16位，在前面用0补全
this.matrix = sShape.match(/\d{4}/g); //利用正则表达式匹配
this.oBlock = new TETRIS.Block(this.matrix);
clearInterval(T.timer);
//注册定时器
T.timer = setInterval(function (){
T.oBlock.move("down");
}, 1000);
if( !T.oBlock.checkBlock() ){
alert("Game Over~");
clearInterval(T.timer);
}
},
updateBoard : function (){ //更新面板
for(var i = 0 ; i < 4 ; i++){
this.aBoardGrids[T.oBlock.shape[i].y][T.oBlock.shape[i].x] = 1;
}
},
eraseLines : function (){
var iLines = 0;
for(var j = 17 ; j >= 0 ; j--){
var num = 0;
for(var i = 0 ; i< 10 ; i++){
if(this.aBoardGrids[j][i] == 1)
num ++;
}
if(num == 10){
iLines ++;
for(var m = 0 ; m < i ; m++){
for(var n = j ; n > 0 ; n--){
this.aBoardGrids[n][m] = this.aBoardGrids[n-1][m];
T.oDomBoard.rows[n].cells[m].style.background = T.oDomBoard.rows[n-1].cells[m].style.background;
}
this.aBoardGrids[0][m] = 0;
}
j++;
}
}
return iLines;
},
setScore : function (iLines){
var iScore = parseInt(this.oDomScore.innerHTML);
if(iLines == 1){
iScore += 100;
} else if(iLines == 2){
iScore += 300;
} else if(iLines == 3){
iScore += 500;
} else if(iLines == 4){
iScore += 1000;
}
this.oDomScore.innerHTML = iScore;
}
}
TETRIS.Block = function (matrix){
this.shape = (function(){
var aShape = [];
for(var i = 0 ; i < matrix.length ; i++){
var sValue = matrix[i];
for(var j = 0 ; j < sValue.length ; j++){
if(sValue.charAt(j) == "1"){
aShape.push({ x : j+3 , y : i });
}
}
}
return aShape;
})();
this.draw();
}
TETRIS.Block.prototype.move = function (direction){//移动
if(this.checkBlock(this.shape,direction)){
this.draw("clear");
for(var i = 0 ; i < 4 ; i++){
switch(direction){
case "left"://←
this.shape[i].x--;
break;
case "right":
this.shape[i].x++;
break;
case "down":
this.shape[i].y++;
break;
}
}
this.draw();
} else {
if(direction == "down"){
this.draw();
T.updateBoard(); //更新面板
var iLines = T.eraseLines();
if(iLines > 0){
T.setScore(iLines);
}
T.next(); //再生成一个新的方块
}
}
}
TETRIS.Block.prototype.rotate = function (matrix){//变形
this.shape = (function(oBlock){
var aX = [];
var aY = [];
for(var i = 0 ; i < 4 ; i++){
aX.push(oBlock.shape[i].x);
aY.push(oBlock.shape[i].y);
}
var iMinX = aX.getMin();
var iMinY = aY.getMin();
var aShape = [];
for(var i = 0 ; i < matrix.length ; i++){
var sValue = matrix[i];
for(var j = 0 ; j < sValue.length ; j++){
if(sValue.charAt(j) == "1"){
aShape.push({ x : j+iMinX , y : i+iMinY });
}
}
}
if( !( oBlock.checkBlock(aShape)) )
return oBlock.shape;
oBlock.draw("clear");
return aShape;
})(this);
this.draw();
}
TETRIS.Block.prototype.draw = function (opt){//绘图
for(var i = 0 ; i < this.shape.length ; i++){
var oShape = this.shape[i];
T.oDomBoard.rows[oShape.y].cells[oShape.x].style.background = (opt==undefined?"#09F":"");
}
}
TETRIS.Block.prototype.checkBlock = function (shape, direction){
shape = shape || this.shape;
for(var i = 0 ; i < 4 ; i++){
if(direction == "left"){
if(shape[i].x == 0 || T.aBoardGrids[shape[i].y][shape[i].x - 1] == 1){
return false;
}
} else if(direction == "right"){
if(shape[i].x == 9 || T.aBoardGrids[shape[i].y][shape[i].x + 1] == 1){
return false;
}
} else if(direction == "down"){
if(shape[i].y == 17 || T.aBoardGrids[shape[i].y + 1][shape[i].x] ==1){
return false;
}
}
if(shape[i].x < 0 || shape[i].x > 9 || shape[i].y < 0 || shape[i].y > 17)
return false;
if(T.aBoardGrids[shape[i].y][shape[i].x] == 1){
return false;
}
}
return true;
}
Array.prototype.getMin = function (){
var iMin = this[0];
for(var i = 0 ; i < this.length ; i++){
if(this[i] < iMin)
iMin = this[i];
}
return iMin;
}
window.onload = function(){
T.init();
var oBtnPlay = document.getElementById("btnPlay");
oBtnPlay.onclick = function(){
if(this.value == "begin"){
T.next();
this.value = "over";
} else {
this.value = "begin";
alert("Game Over~");
clearInterval(T.timer);
}
}
var oBtnPause = document.getElementById("btnPause");
oBtnPause.onclick = function (){
if(this.value == "pause"){
clearInterval(T.timer);
this.value = "resume";
} else {
T.timer = setInterval(function (){
T.oBlock.move("down");
}, 1000);
this.value = "pause";
}
}
}
</script>
</head>
<body>
<table id="gameBoard"></table>
<div id="gameControl">
Score ： <span id="score">0</span><br />
<input type="button" id="btnPlay" value="begin" />
<input type="button" id="btnPause" value="pause" /><br/>
<span>俄罗斯方块</span>
</div>
</body>
</html>
程序有待优化改进，欢迎大家批评指正