bool BlocksNorth() const { return flags & BLOCK_NORTH; }
bool BlocksEast() const { return flags & BLOCK_EAST; }
bool BlocksSouth() const { return flags & BLOCK_SOUTH; }
bool BlocksWest() const { return flags & BLOCK_WEST; }
bool BlocksNorth() const { return flags & BLOCK_NORTH; }
bool BlocksEast() const { return flags & BLOCK_EAST; }
bool BlocksSouth() const { return flags & BLOCK_SOUTH; }
bool BlocksWest() const { return flags & BLOCK_WEST; }