一个简单的俄罗斯方块脚本

这是一个简单的俄罗斯方块的源码，用JavaScript编写。它是我以前在网上偶尔发现的，觉得很有价值，于是收藏起来。遗憾的是，现在已经不知其出处了。

该脚本最大的特点(优点)是用数组存储所需数据，简化了编程，值得学习。虽没有注释，但看起来应该不难理解作者的思路。

<HTML>

<HEAD>

<TITLE>俄罗斯方块</TITLE>

<style>

body {margin:0;background:black;}

td {height:20;width:20;}

#block_div {position:absolute;z-index:1;width:80;}

#table_div {position:absolute;z-index:0;width:320;}

#nblock_div {position:absolute;z-index:2;font:48 system;color:red;}

#title_div {position:absolute;left:326;top:7;font-size:9pt;color:white}

#infobar_div {position:absolute;left:396;top:416;}

#infobar2_div {position:absolute;left:396;top:480;font-size:9pt;color:white}

#infobar2_div a{color:99ccff;font:system;text-decoration:none}

</style>

if (document.all){

var n_width = 800;

var n_height = 600;

var n_left = Math.round( screen.width/2 ) - n_width/2;

var n_top = Math.round( screen.height/2 ) - n_height/2;

var n_IncStep = 20;

var curBlcok,nextBlock;

var arr_curBlock = new Array(0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0);

var curX,curY;

var speed=1;

var maxspeed=9;

var clr_per_line=18;

var pause=0;

var gameover=0;

var colors = new Array("#999999","#0000FF","#80FFFF","#80FF80","#FFFF00","#FF8000","#FF00FF","#FF0000");

var cid;

var ncid;

var blocks = new Array("tt_O1","tt_T2","tt_Z1","tt_S1","tt_L1","tt_J1","tt_I2");

var bid;

var killedlines=0;

var tt_O1 = new Array(0,0,0,0,0,0,0,0,0,1,1,0,0,1,1,0);

var tt_O2 = new Array(0,0,0,0,0,0,0,0,0,1,1,0,0,1,1,0);

var tt_O3 = new Array(0,0,0,0,0,0,0,0,0,1,1,0,0,1,1,0);

var tt_O4 = new Array(0,0,0,0,0,0,0,0,0,1,1,0,0,1,1,0);

var tt_T1 = new Array(0,0,0,0,0,1,0,0,1,1,0,0,0,1,0,0);

var tt_T2 = new Array(0,0,0,0,0,0,0,0,1,1,1,0,0,1,0,0);

var tt_T3 = new Array(0,0,0,0,0,1,0,0,0,1,1,0,0,1,0,0);

var tt_T4 = new Array(0,0,0,0,0,1,0,0,1,1,1,0,0,0,0,0);

var tt_Z1 = new Array(0,0,0,0,1,1,0,0,0,1,1,0,0,0,0,0);

var tt_Z2 = new Array(0,0,0,0,0,0,1,0,0,1,1,0,0,1,0,0);

var tt_Z3 = new Array(0,0,0,0,0,1,1,0,0,0,1,1,0,0,0,0);

var tt_Z4 = new Array(0,0,1,0,0,1,1,0,0,1,0,0,0,0,0,0);

var tt_S1 = new Array(0,0,0,0,0,1,1,0,1,1,0,0,0,0,0,0);

var tt_S2 = new Array(0,0,0,0,0,1,0,0,0,1,1,0,0,0,1,0);

var tt_S3 = new Array(0,0,0,0,0,0,1,1,0,1,1,0,0,0,0,0);

var tt_S4 = new Array(0,1,0,0,0,1,1,0,0,0,1,0,0,0,0,0);

var tt_L1 = new Array(0,1,0,0,0,1,0,0,0,1,1,0,0,0,0,0);

var tt_L2 = new Array(0,0,0,0,0,0,1,0,1,1,1,0,0,0,0,0);

var tt_L3 = new Array(0,0,0,0,0,1,1,0,0,0,1,0,0,0,1,0);

var tt_L4 = new Array(0,0,0,0,0,1,1,1,0,1,0,0,0,0,0,0);

var tt_J1 = new Array(0,0,1,0,0,0,1,0,0,1,1,0,0,0,0,0);

var tt_J2 = new Array(0,0,0,0,1,1,1,0,0,0,1,0,0,0,0,0);

var tt_J3 = new Array(0,0,0,0,0,1,1,0,0,1,0,0,0,1,0,0);

var tt_J4 = new Array(0,0,0,0,0,1,0,0,0,1,1,1,0,0,0,0);

var tt_I1 = new Array(0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0);

var tt_I2 = new Array(0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1);

var tt_I3 = new Array(0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0);

var tt_I4 = new Array(0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1);

var table = new Array(

1,1,0,0,0,0,0,0,0,0,0,0,0,0,1,1,

1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1)

}

else

alert("You need IE4+ to play Tetris!")

function dimension2(row,col,num){

var i = row * num + col;

return (this[i]);

}

Array.prototype.getd = dimension2;

function ShowBlock(x,y,block_type,color){

for (var i=0;i<block_tbl.rows.length;i++){

for (var j=0;j<block_tbl.rows(i).cells.length;j++){

var d2 = i * 4 + j;

if (block_type[d2]==1){

block_tbl.rows(i).cells(j).style.background = color;

}

else{

block_tbl.rows(i).cells(j).style.background = "";

}

block_div.style.pixelLeft=x;

block_div.style.pixelTop=y;

}

function ShowBlock1(x,y,block_type,color,obj_tabID,obj_divID){

for (var i=0;i<obj_tabID.rows.length;i++){

for (var j=0;j<obj_tabID.rows(i).cells.length;j++){

var d2 = i * 4 + j;

if (block_type[d2]==1){

obj_tabID.rows(i).cells(j).style.background = color;

}

else{

obj_tabID.rows(i).cells(j).style.background = "";

}

obj_divID.style.pixelLeft=x;

obj_divID.style.pixelTop=y;

}

function Change(inc){

var type = curBlock.substr(0,4);

var num = curBlock.substr(curBlock.length-1);

num = parseInt(num) + inc;

if (num>4||num<1) num -= 4*inc;

type += num;

eval("arr_tmp = " + type + ";");

if (CanMove(curX,curY,arr_tmp)){

curBlock = type;

eval("arr_curBlock = " + curBlock + ";");

eval("ShowBlock(block_div.style.pixelLeft,block_div.style.pixelTop," + curBlock + ",colors[" + cid + "]);");

}

function CanMove(x,y,block){

for (i=0;i<4;i++){

for (j=0;j<4;j++){

if (block.getd(i,j,4)&table.getd(y/n_IncStep+i,x/n_IncStep+j,16)) return false;

}

return true;

}

function NewBlock(){

curBlock = nextBlock;

cid = ncid;

bid = Math.round(Math.random()*(blocks.length-1));

ncid = Math.round(Math.random()*(colors.length-1));

nextBlock = blocks[bid];

eval("arr_curBlock = " + curBlock + ";");

eval("ShowBlock(120,0," + curBlock + ",colors[" + cid + "]);");

eval("arr_curBlock = " + curBlock + ";");

eval("ShowBlock1(466,116," + nextBlock + ",colors[" + ncid + "],nblock_tbl,nblock_div);");

}

function SaveBlock(){

for (i=0;i<4;i++){

for (j=0;j<4;j++){

table[(curY/n_IncStep+i)*16+curX/n_IncStep+j]|=arr_curBlock[i*4+j];

if (arr_curBlock[i*4+j]==1)

if ((curY/n_IncStep+i<21)&&(curX/n_IncStep+j>1)&&(curX/n_IncStep+j<14))

table_tbl.rows(curY/n_IncStep+i).cells(curX/n_IncStep+j).style.background = colors[cid];

if (table[(curY/n_IncStep+i)*16+curX/n_IncStep+j]!=1)

table_tbl.rows(curY/n_IncStep+i).cells(curX/n_IncStep+j).style.background = "black";

}

function DelLine(line){

for(i=line;i>0;i--){

for(j=2;j<14;j++){

table[i*16+j]=table[(i-1)*16+j];

}

table_tbl.deleteRow(line);

table_tbl.insertRow(0);

for (i=0;i<16;i++){

table_tbl.rows(0).insertCell();

if (i<2||i>13) table_tbl.rows(0).cells(i).style.background="navy";

}

killedlines++;

cll.innerText=parseInt(cll.innerText)+1;

}

function DelLines(){

var c,d,i,j;

d=0;

curY=block_div.style.pixelTop;

for(i=(curY/20+3);i>curY/20-1;i--){

c=0;

for(j=2;j<14;j++){

if (isNaN(table[i*16+j])||i==21) break;

c+=table[i*16+j];

}

if(c==12){

DelLine(i);

i++;

d++;

}

if (d>0)

sco.innerText=parseInt(sco.innerText)+d*d*36;

}

function Lucifer(){

for(var i=2;i<14;i++){

if (table[16+i]==1) return true;

}

return false;

}

function GameOver(){

gameover=1;

clearInterval(gameInterval);

block_div.innerHTML="";

for (i=0;i<21;i++){

for (j=2;j<14;j++){

setTimeout("table_tbl.rows(" + i + ").cells(" + j + ").style.background = colors[Math.round(Math.random()*7)];",16*i*j);

}

nblock_div.innerHTML = "Game Over";

}

function document_onkeydown() {

if (gameover==1) return;

with (block_div.style){

curX = pixelLeft;

curY = pixelTop;

switch (event.keyCode){

case 37:

if (CanMove(curX-n_IncStep,curY,arr_curBlock))

pixelLeft-=n_IncStep;

break;

case 38:

Change(1);

break;

case 39:

if (CanMove(curX+n_IncStep,curY,arr_curBlock))

pixelLeft+=n_IncStep;

break;

case 40:

if (CanMove(curX,curY+n_IncStep,arr_curBlock)){

pixelTop+=n_IncStep;

}

else{

SaveBlock();

DelLines();

if (Lucifer()){

GameOver();

return;

}

sco.innerText=parseInt(sco.innerText)+2;

NewBlock();

}

break;

case 32:

if (pause==0){

clearInterval(gameInterval);

pause=1;

}

else{

gameInterval=window.setInterval("Handle_Interval()",(maxspeed-speed+1)*60);

pause=0;

}

break;

case 90:

Change(1);

break;

case 88:

Change(-1);

break;

default:

}

function Handle_Interval(){

curX = block_div.style.pixelLeft;

curY = block_div.style.pixelTop;

if (CanMove(curX,curY+n_IncStep,arr_curBlock)){

block_div.style.pixelTop+=n_IncStep;

}

else{

SaveBlock();

DelLines();

if (Lucifer()){

GameOver();

return;

}

sco.innerText=parseInt(sco.innerText)+2

NewBlock();

}

if (killedlines>=clr_per_line){

killedlines-=clr_per_line;

if (speed<maxspeed)

speed++;

else

speed=maxspeed;

spd.innerText=speed;

clearInterval(gameInterval);

gameInterval=window.setInterval("Handle_Interval()",(maxspeed-speed+1)*60);

}

</SCRIPT>

if (document.all)

document_onkeydown()

</SCRIPT>

</HEAD>

if (document.all){

for (var i=0;i<4;i++){

document.write("<tr>");

for (var j=0;j<4;j++){

document.write("<td style=\"border:1 solid black;\"></td>");

}

document.write("</tr>");

}

</script>

</table>

</div>

if (document.all){

for (var i=0;i<4;i++){

document.write("<tr>");

for (var j=0;j<4;j++){

document.write("<td style=\"height:40;width:40;border:1 outset black;\"></td>");

}

document.write("</tr>");

}

</script>

</table>

</div>

if (document.all){

for (var i=0;i<22;i++){

document.write("<tr>");

for (var j=0;j<16;j++){

var d2 = i * 16 + j;

if (table[d2]==1)

document.write("<td bgcolor=navy></td>");

else

document.write("<td style=\"background:black;\"></td>");

}

document.write("</tr>");

}

</script>

</table>

</div>

<p align="center">请输入游戏速度（0－9）： <input type="text" size=3 id="speedin" style="font-size: 9pt" name="SuperSo">

</tr>

</table>

</div>

if (document.all){

ncid = Math.round(Math.random()*(colors.length-1));

bid = Math.round(Math.random()*(blocks.length-1));

nextBlock = blocks[bid];

NewBlock();

}

function begintet(){

document.all.speedin.disabled=true

document.all.but.disabled=true

speed=parseInt(document.all.speedin.value);

if (isNaN(speed)||speed==null||speed>maxspeed||speed<1) speed=1;

spd.innerText=speed;

gameInterval=window.setInterval("Handle_Interval()",(maxspeed-speed+1)*60);

}

</SCRIPT>

</BODY>

</HTML>

首次发布：2003-04-14

最后修订：2003-04-14