web小游戏 2048制作（三）:辅助函数 support2048.js

function getPosTop(i,j)
{
return 20+i*120;
}
function getPosLeft(i,j)
{
return 20+j*120;
}
function getBackGroundColor(number)
{
switch(number)
{
case 2:return "#eee4da";break;
case 4:return "#ede0c8";break;
case 8:return "#f2b179";break;
case 16:return "#f59563";break;
case 32:return "#f67c5f";break;
case 64:return "#f65e3b";break;
case 128:return "#edcf72";break;
case 256:return "#edcc61";break;
case 512:return "#9c0";break;
case 1024:return "#33b5e5";break;
case 2048:return "#09c";break;
case 4096:return "#a6c";break;
case 8192:return "#93c";break;
}
return "black";
}
function getNumberColor( number ){
if( number <= 4 )
return "#776e65";

return "white";
}
function noSpace(board)
{
for(var i=0;i<4;i++)
{
for (var j=0;j<4;j++)
{
if(board[i][j]==0)
{
return false;
}
}
}
return true;
}

function canMoveLeft(board)
{
for(var i=0;i<4;i++)
{
for (var j=1;j<4;j++)
{
if(board[i][j]!=0)
{
if(board[i][j-1]==0||board[i][j-1]==board[i][j])
{
return true;
}
}
}
}
return false;
}
function canMoveUp(board)
{
for(var i=1;i<4;i++)
{
for (var j=0;j<4;j++)
{
if(board[i][j]!=0)
{
if(board[i-1][j]==0||board[i-1][j]==board[i][j])
{
return true;
}
}
}
}
return false;
}
function canMoveRight(board)
{
for(var i=0;i<4;i++)
{
for (var j=0;j<3;j++)
{
if(board[i][j]!=0)
{
if(board[i][j+1]==0||board[i][j+1]==board[i][j])
{
return true;
}
}
}
}
return false;
}
function canMoveDown(board)
{
for(var i=0;i<3;i++)
{
for (var j=0;j<4;j++)
{
if(board[i][j]!=0)
{
if(board[i+1][j]==0||board[i+1][j]==board[i][j])
{
return true;
}
}
}
}
return false;
}
function noRowBlock(row,col1,col2,board)
{
for(var i=col1+1;i<col2;i++)
{
if(board[row][i]!=0)
{
return false;
}
}
return true;
}
function noColBlock(col,row1,row2,board)
{
for(var i=row1+1;i<row2;i++)
{
if(board[i][col]!=0)
{
return false;
}
}
return true;
}