各位~！跪求俄罗斯方块的变形思想

定义一个四维数组：
int r[方块种类][变形1-4][x坐标][y坐标]=
{
    //形状1
    {
        {
            {1,0,0,0},
            {1,0,0,0},
            {1,1,0,0},
            {0,0,0,0}
        },//变形1
        {
            {0,0,0,0},
            {1,0,0,0},
            {1,1,1,0},
            {0,0,0,0}
&