/// <summary>
/// Returns all accessible neighbours of this map block.
/// Neighbour is acessible if there's no wall/locked gate between this block and the neighbour.
/// </summary>
/// <returns>Neighbour blocks.</returns>
public List <MapBlock> AccessibleNeighbours()
{
Direction[] allDirections = DirectionMethods.GetAllDirections();
List <MapBlock> neighbours = new List <MapBlock>();
foreach (Direction dir in allDirections)
{
MapBlock neighbour = NextOpenBlock(dir);
if (neighbour != null)
{
neighbours.Add(neighbour);
}
}
return(neighbours);
}
/// <summary>
/// Returns the block thich lies next to this block in given direction and is accessible (entrance is OPEN).
/// 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, accessible block or null.</returns>
public MapBlock NextOpenBlock(Direction direction)
{
MapBlock nextOpenBlock = NextBlock(direction);
if (nextOpenBlock == null)
{
return(null);
}
else
{
if (EntranceInDirection(direction).IsOpen() && nextOpenBlock.EntranceInDirection(direction.OppositeDirection()).IsOpen())
{
return(nextOpenBlock);
}
else
{
return(null);
}
}
}
/// <summary>
/// Returns direction from one block to another. Uses only block's coordinates to calculate the direction.
/// Returns NO_DIRECTION if the blocks have same coordinates.
/// Works best for adjacent blocks.
/// </summary>
/// <param name="from">Start block<./param>
/// <param name="to">Target block.</param>
/// <returns>Direction between two blocks.</returns>
public static Direction GetDirection(MapBlock from, MapBlock to)
{
if (from.X < to.X)
{
return(Direction.EAST);
}
else if (from.X > to.X)
{
return(Direction.WEST);
}
else if (from.Y < to.Y)
{
return(Direction.SOUTH);
}
else if (from.Y > to.Y)
{
return(Direction.NORTH);
}
else
{
return(Direction.NO_DIRECTION);
}
}