JS大神进来看看

var tbl;
var status = 0;
var timer;
var score = 0;
var board = new Array(18);
for(var i=0;i<18;i++){
board[i] = new Array(10);
}
for(var i=0;i<18;i++){
for(var j=0; j<10; j++){
board[i][j] = 0;
}
}
var activeBlock;
function generateBlock(){
activeBlock = null;
activeBlock = new Array(4);
//generate a random int number between 0-6;
var t = (Math.floor(Math.random()*20)+1)%7;
switch(t){
case 0:{
activeBlock[0] = {x:0, y:4};
activeBlock[1] = {x:1, y:4};
activeBlock[2] = {x:0, y:5};
activeBlock[3] = {x:1, y:5};
break;
}
case 1:{
activeBlock[0] = {x:0, y:3};
activeBlock[1] = {x:0, y:4};
activeBlock[2] = {x:0, y:5};
activeBlock[3] = {x:0, y:6};
break;
}
case 2:{
activeBlock[0] = {x:0, y:5};
activeBlock[1] = {x:1, y:4};
activeBlock[2] = {x:1, y:5};
activeBlock[3] = {x:2, y:4};
break;
}
case 3:{
activeBlock[0] = {x:0, y:4};
activeBlock[1] = {x:1, y:4};
activeBlock[2] = {x:1, y:5};
activeBlock[3] = {x:2, y:5};
break;
}
case 4:{
activeBlock[0] = {x:0, y:4};
activeBlock[1] = {x:1, y:4};
activeBlock[2] = {x:1, y:5};
activeBlock[3] = {x:1, y:6};
break;
}
case 5:{
activeBlock[0] = {x:0, y:4};
activeBlock[1] = {x:1, y:4};
activeBlock[2] = {x:2, y:4};
activeBlock[3] = {x:2, y:5};
break;
}
case 6:{
activeBlock[0] = {x:0, y:5};
activeBlock[1] = {x:1, y:4};
activeBlock[2] = {x:1, y:5};
activeBlock[3] = {x:1, y:6};
break;
}
}
for(var i=0; i<4; i++){
if(!isCellValid(activeBlock[i].x, activeBlock[i].y)){
return false;
}
}
return true;
}
function moveDown(){
if(checkBottomBorder()){
erase();
for(var i=0; i<4; i++){
activeBlock[i].x = activeBlock[i].x + 1;
}
paint();
}
else{
clearInterval(timer);
updateBoard();
var lines = deleteLine();
if(lines!=0){
score = score + lines*10;
updateScore();
eraseBoard();
paintBoard();
}
.
if(!generateBlock()){
alert("Game over!");
status = 2;
return;
}
paint();
timer = setInterval(moveDown,1000)
}
}
function moveLeft(){
if(checkLeftBorder()){
erase();
for(var i=0; i<4; i++){
activeBlock[i].y = activeBlock[i].y - 1;
}
paint();
}
}
//右移动
function moveRight(){
if(checkRightBorder()){
erase();
for(var i=0; i<4; i++){
activeBlock[i].y = activeBlock[i].y + 1;
}
paint();
}
}
function rotate(){
var tmpBlock = new Array(4);
for(var i=0; i<4; i++){
tmpBlock[i] = {x:0, y:0};
}
for(var i=0; i<4; i++){
tmpBlock[i].x = activeBlock[i].x;
tmpBlock[i].y = activeBlock[i].y;
}
var cx = Math.round((tmpBlock[0].x + tmpBlock[1].x + tmpBlock[2].x + tmpBlock[3].x)/4);
var cy = Math.round((tmpBlock[0].y + tmpBlock[1].y + tmpBlock[2].y + tmpBlock[3].y)/4);
for(var i=0; i<4; i++){
tmpBlock[i].x = cx+cy-activeBlock[i].y;
tmpBlock[i].y = cy-cx+activeBlock[i].x;
}
for(var i=0; i<4; i++){
if(!isCellValid(tmpBlock[i].x,tmpBlock[i].y)){
return;
}
}
erase();
for(var i=0; i<4; i++){
activeBlock[i].x = tmpBlock[i].x;
activeBlock[i].y = tmpBlock[i].y;
}
paint();
}
function checkLeftBorder(){
for(var i=0; i<activeBlock.length; i++){
if(activeBlock[i].y==0){
return false;
}
if(!isCellValid(activeBlock[i].x, activeBlock[i].y-1)){
return false;
}
}
return true;
}
function checkRightBorder(){
for(var i=0; i<activeBlock.length; i++){
if(activeBlock[i].y==9){
return false;
}
if(!isCellValid(activeBlock[i].x, activeBlock[i].y+1)){
return false;
}
}
return true;
}
function checkBottomBorder(){
for(var i=0; i<activeBlock.length; i++){
if(activeBlock[i].x==17){
return false;
}
if(!isCellValid(activeBlock[i].x+1, activeBlock[i].y)){
return false;
}
}
return true;
}
function isCellValid(x, y){
if(x>17||x<0||y>9||y<0){
return false;
}
if(board[x][y]==1){
return false;
}
return true;
}
function erase(){
for(var i=0; i<4; i++){
tbl.rows[activeBlock[i].x].cells[activeBlock[i].y].style.backgroundColor="white";
}
}
function paint(){
for(var i=0; i<4; i++){
tbl.rows[activeBlock[i].x].cells[activeBlock[i].y].style.backgroundColor="red";
}
}
function updateBoard(){
for(var i=0; i<4; i++){
board[activeBlock[i].x][activeBlock[i].y]=1;
}
}
function deleteLine(){
var lines = 0;
for(var i=0; i<18; i++){
var j=0;
for(; j<10; j++){
if(board[i][j]==0){
break;
}
}
if(j==10){
lines++;
if(i!=0){
for(var k=i-1; k>=0; k--){
board[k+1] = board[k];
}
}
board[0] = generateBlankLine();
}
}
return lines;
}
function eraseBoard(){
for(var i=0; i<18; i++){
for(var j=0; j<10; j++){
tbl.rows[i].cells[j].style.backgroundColor = "white";
}
}
}
//重绘整个面板
function paintBoard(){
for(var i=0;i<18;i++){
for(var j=0; j<10; j++){
if(board[i][j]==1){
tbl.rows[i].cells[j].style.backgroundColor = "red";
}
}
}
}
function generateBlankLine(){
var line = new Array(10);
for(var i=0; i<10; i++){
line[i] = 0;
}
return line;
}
function updateScore(){
document.getElementById("score").innerText=" " + score;
}
function keyControl(){
if(status!=1){
return;
}
var code = event.keyCode;
switch(code){
case 37:{
moveLeft();
break;
}
case 38:{
rotate();
break;
}
case 39:{
moveRight();
break;
}
case 40:{
moveDown();
break;
}
}
}
function begin(e){
e.disabled = true;
status = 1;
tbl = document.getElementById("board");
if(!generateBlock()){
alert("Game over!");
status = 2;
return;
}
paint();
timer = setInterval(moveDown,1000);
}
document.onkeydown=keyControl;