public static Coordinate Move(this Coordinate coordinates, Compass8Points direction)
{
switch (direction)
{
case Compass8Points.North: return(coordinates.Up());
case Compass8Points.NorthEast: return(coordinates.Up().Right());
case Compass8Points.NorthWest: return(coordinates.Up().Left());
case Compass8Points.South: return(coordinates.Down());
case Compass8Points.SouthEast: return(coordinates.Down().Right());
case Compass8Points.SouthWest: return(coordinates.Down().Left());
case Compass8Points.East: return(coordinates.Right());
case Compass8Points.West: return(coordinates.Left());
default:
var message = $"Unrecognised direction [{direction}]";
throw new ArgumentException(message);
}
}
public static WallDirection ToWallDirection(this Compass8Points direction)
{
if (InsideCorners.ContainsKey(direction))
{
return(InsideCorners[direction]);
}
return(OutsideCorners[direction]);
}
public static bool IsCorner(this Compass8Points surroundingTiles)
{
if (surroundingTiles == Compass8Points.Undefined)
{
return(false);
}
return(OutsideCorners.ContainsKey(surroundingTiles) ||
InsideCorners.ContainsKey(surroundingTiles));
}
public static bool IsVertical(this Compass8Points surroundingTiles)
{
var isEasterly = ExcludeEasterly.DoesNotHaveTheseDirections(surroundingTiles);
if (isEasterly)
{
return(true);
}
var isWesterly = ExcludeWesterly.DoesNotHaveTheseDirections(surroundingTiles);
return(isWesterly);
}
public static bool IsHorizontal(this Compass8Points surroundingTiles)
{
var isSoutherly = ExcludeSoutherly.DoesNotHaveTheseDirections(surroundingTiles);
if (isSoutherly)
{
return(true);
}
var isNortherly = ExcludeNortherly.DoesNotHaveTheseDirections(surroundingTiles);
return(isNortherly);
}
private static bool DoesNotHaveTheseDirections(this Compass8Points source, Compass8Points compare)
{
return((source & compare) == Compass8Points.Undefined);
}
