Tetris Piece Rotation Algorithm

Question

What are the best algorithms (and explanations) for representing and rotating the pieces of a tetris game? I always find the piece rotation and representation schemes confu

Answer 1

If array size is 3*3 ,than the simplest way to rotate it for example in anti-clockwise direction is:

oldShapeMap[3][3] = {{1,1,0},
                     {0,1,0},
                     {0,1,1}};

bool newShapeMap[3][3] = {0};
int gridSize = 3;

for(int i=0;i