/// <summary>
/// Returns the block which lies next to this block in given direction.
/// If such block doesn't exist null is returned.
/// Uses parent map to determine next block and if the parent map is null, null is returned.
/// </summary>
/// <param name="direction">Direction of next block.</param>
/// <returns>Adjacent block or null.</returns>
public MapBlock NextBlock(Direction direction)
{
if (ParentMap == null)
{
return(null);
}
return(ParentMap.AdjacentBlock(x, y, direction));
}
