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

Personally I've always just represented the rotations by hand - with very few shapes, it's easy to code that way. Basically I had (as pseudo-code)

class Shape
{
    Color color;
    ShapeRotation[] rotations;
}

class ShapeRotation
{
    Point[4] points;
}

class Point
{
    int x, y;
}

At least conceptually - a multi-dimensional array of points directly in shape would do the trick too :)