public PieceInstance(Piece piece, int rotation, Point position)
{
Piece = piece;
Rotation = rotation % piece.Shapes.Length;
Position = position;
}
public TetrisGameState(IPieceGenerator generator, int rows, int points, PieceInstance current, Piece next, Color[,] grid)
{
PieceGenerator = generator;
Level = rows / 10;
Rows = rows;
Points = points;
CurrentPiece = current;
NextPiece = next;
Grid = grid;
IsFinished = !ValidPosition(current, grid);
}