private List<Direction> GetAdjacencies(bool cardinal)
{
//Are we getting adjacencies for cardinal or diagonal directions?
List<int> directionIndexes = cardinal ?
TileHelper.CardinalDirections().Select(direction => (int)direction).ToList() :
TileHelper.DiagonalDirections().Select(direction => (int)direction).ToList();
//Loop through each index in direction indexes, pick those that exist and cast them to the Direction enum.
return (from index in directionIndexes where connections[index].Exists select (Direction) index).ToList();
}
/**
* Get the direction of the only cardinal/diagonal non connection.
* Assumes there is exactly one cardinal/diagonal non connection
*/
public Direction GetSingleNonConnection(bool cardinal = true)
{
List<Direction> foundConnections = GetAdjacencies(cardinal);
List<Direction> directions = cardinal ? TileHelper.CardinalDirections() : TileHelper.DiagonalDirections();
List<Direction> missingConnections =
directions.Where(direction => !foundConnections.Contains(direction)).ToList();
return missingConnections[0];
}
