main2048.js

var board=new Array();
var score=0;

var hasConflicted=new Array();

$(document).ready(function(){
	//重新开始游戏
	newgame();

});

function newgame(){
	//初始化棋盘

	init();
	//在随机两个格子生成数字
	generateOneNumber();
	generateOneNumber();

	score=0;
	

}

function init(){
	for(var i=0;i<4;i++)
	{
		for(var j=0;j<4;j++)
		{
			var gridCell=$("#grid-cell-"+i+"-"+j);
			gridCell.css("top",getPosTop(i,j));
			gridCell.css("left",getPosLeft(i,j));
		}
	}

	for(var i=0;i<4;i++)
	{
		board[i]=new Array();
		hasConflicted[i]=new Array();
		for(var j=0;j<4;j++)
		{
			board[i][j]=0;
			hasConflicted[i][j]=false;
		}
	}
	updateBoardView();
}

//在每个cell上面再生成一层number cell
function updateBoardView(){
	//
	$(".number-cell").remove();
	for(var i=0;i<4;i++)
	{
		for(var j=0;j<4;j++)
		{
			$("#grid-container").append('<div class="number-cell" id="number-cell-'+i+'-'+j+'"></div>');
			var theNumberCell=$('#number-cell-'+i+'-'+j);

			if(board[i][j]==0)
			{
				//不显示
				theNumberCell.css('width','0px');
				theNumberCell.css('height','0px');
				theNumberCell.css("top",getPosTop(i,j)+50);
			    theNumberCell.css("left",getPosLeft(i,j)+50);

			}else{

				theNumberCell.css('width','100px');
				theNumberCell.css('height','100px');
				theNumberCell.css("top",getPosTop(i,j));
			    theNumberCell.css("left",getPosLeft(i,j));
			    theNumberCell.css("background-color",getNumberBackgroundColor(board[i][j]));
			    theNumberCell.css("color",getNumberColor(board[i][j]));
			    theNumberCell.text(showboard(board[i][j]));
			}

			hasConflicted[i][j]=false;
		}
	}

}

function generateOneNumber()
{
	
	if(nospace(board))
	{
		return false;
	}
		
	
	//随机一个位置
	var randx=parseInt(Math.floor(Math.random()*4));
	var randy=parseInt(Math.floor(Math.random()*4));
	

	while(true)
	{
		if(board[randx][randy]==0)
		
			break;
		
		randx=parseInt(Math.floor(Math.random()*4));
		randy=parseInt(Math.floor(Math.random()*4));
	}
	//随机一个数字
	var randNumber=Math.random()<0.5 ? 2:4;

	//在随机位置生成随机数字
	board[randx][randy]= randNumber;
	//
	showNumberWithAnimation(randx,randy,randNumber);
	
	return true;
}

$(document).keydown(function(event){
	switch(event.keyCode)
	{
		case 37: //left

			if(moveLeft()){
				setTimeout("generateOneNumber()",210);
				setTimeout("isgameover()",300);
				
			}
		 	 break;
		case 38://up
			if(moveUp()){
				setTimeout("generateOneNumber()",210);
				setTimeout("isgameover()",300);
				
			}
			break;
		case 39: //right
			if(moveRight()){
				setTimeout("generateOneNumber()",210);
				setTimeout("isgameover()",300);
				
			}
			break;
		case 40: //down
			if(moveDown()){
				setTimeout("generateOneNumber()",210);
				setTimeout("isgameover()",300);
			}
			break;
		default:
			break;

	}
});

function isgameover()
{
   if(nospace(board)&&nomove(board))
   	gameover();
}

function gameover()
{
	alert("game over");
}
function moveLeft()
{
	
	if(!canMoveLeft(board)){
		return false;
	}
	//moveLeft
	for(var i=0;i<4;i++)
	{
		for(var j=1;j<4;j++)
		{
			if(board[i][j]!=0){
				for(var k=0;k<j;k++){
					if(board[i][k]==0&&noBlockHorizontal(i,k,j,board)){
						//move
						showMoveAnimation(i,j,i,k);
						board[i][k]=board[i][j];
						board[i][j]=0;
						continue;
					}
					else if(board[i][k]==board[i][j]&&noBlockHorizontal(i,k,j,board)&& !hasConflicted[i][k]){
						//move
						showMoveAnimation(i,j,i,k);
						//add
						board[i][k]+=board[i][j];
						board[i][j]=0;

						//add score

						score +=board[i][k];
						updateScore(score);
						hasConflicted[i][k]=true;
						continue;
					}
				}
			}
		}
	}

   setTimeout("updateBoardView()",200);
	return true;
}

function moveRight()
{
	if(!canMoveRight)
		return false;
	//move right
	for(var i=0;i<4;i++)
	{
		for(var j=2;j>=0; j--)
		{
			if(board[i][j]!=0)
			{
				for(var k=3 ;k>j ;k--)
				{
					if(board[i][k]==0&&noBlockHorizontal(i,j,k,board))
					{
						//move
						showMoveAnimation(i,j,i,k);
						board[i][k]=board[i][j];
						board[i][j]=0;
						continue;
					}else if(board[i][k]==board[i][j]&&noBlockHorizontal(i,j,k,board)&& !hasConflicted[i][k]){
						//move
						//add
						showMoveAnimation(i,j,i,k);
						board[i][k]*=2;
						board[i][j]=0;
						//add score

						score+=board[i][k];
						updateScore(score);

						hasConflicted[i][k]=true;
						continue;
					}
				}
			}
		}
	}
	setTimeout("updateBoardView()",200);
	return	true;
}

function moveUp(){

    if( !canMoveUp( board ) )
        return false;

    //moveUp
    for( var j = 0 ; j < 4 ; j ++ )
        for( var i = 1 ; i < 4 ; i ++ ){
            if( board[i][j] != 0 ){
                for( var k = 0 ; k < i ; k ++ ){

                    if( board[k][j] == 0 && noBlockVertical( j , k , i , board ) ){
                        showMoveAnimation( i , j , k , j );
                        board[k][j] = board[i][j];
                        board[i][j] = 0;
                        continue;
                    }
                    else if( board[k][j] == board[i][j] && noBlockVertical( j , k , i , board ) && !hasConflicted[k][j]){
                        showMoveAnimation( i , j , k , j );
                        board[k][j] *= 2;
                        board[i][j] = 0;
                        //add score

						score+=board[i][k];
						updateScore(score);

						hasConflicted[k][j]=true;

                        continue;
                    }
                }
            }
        }

    setTimeout("updateBoardView()",200);
    return true;
}

function moveDown(){

    if( !canMoveDown( board ) )
        return false;

    //moveDown
    for( var j = 0 ; j < 4 ; j ++ )
        for( var i = 2 ; i >=0 ; i -- ){
            if( board[i][j] != 0 ){
                for( var k = 3 ; k > i ; k -- ){

                    if( board[k][j] == 0 && noBlockVertical( j , i , k, board ) ){
                        showMoveAnimation( i , j , k , j );
                        board[k][j] = board[i][j];
                        board[i][j] = 0;
                        continue;
                    }
                    else if( board[k][j] == board[i][j] && noBlockVertical( j , i , k , board ) && !hasConflicted[k][j]){
                        showMoveAnimation( i , j , k , j );
                        board[k][j] *= 2;
                        board[i][j] = 0;
                        //add score

						score+=board[i][k];
						updateScore(score);

						hasConflicted[k][j]=true;

                        continue;
                    }
                }
            }
        }

    setTimeout("updateBoardView()",200);
    return true;
}