public IEnumerable <XYPoint> GetAllAdjacentPoints(
eDirection startingDirection = eDirection.North,
eDirectionChange deltaDirection = eDirectionChange.Clockwise)
{
// ReSharper disable once RedundantArgumentDefaultValue
return(GetAdjacentPoints(startingDirection, deltaDirection, eAdjacencyType.All));
}
private static void AssertChangeIsCorrectlyApplied(
eDirection startDirection,
eDirectionChange deltaDirection,
eDirection expectedDirection)
{
var resultantDirectionFromTurn = startDirection.Turn(deltaDirection);
var resultantDirectionFromApplyTo = deltaDirection.ApplyTo(startDirection);
Assert.AreEqual(expectedDirection, resultantDirectionFromTurn);
Assert.AreEqual(expectedDirection, resultantDirectionFromApplyTo);
}
public IEnumerable <XYPoint> GetAdjacentPoints(
eDirection startingDirection = eDirection.North,
eDirectionChange deltaDirection = eDirectionChange.Clockwise,
eAdjacencyType adjacencyType = eAdjacencyType.All)
{
var centrePoint = this;
foreach (var currentDirection in DirectionAccessor.Enumerate(startingDirection, deltaDirection))
{
if (adjacencyType.HasFlag(eAdjacencyType.Orthogonal))
{
yield return(centrePoint.MoveOne(currentDirection));
}
if (adjacencyType.HasFlag(eAdjacencyType.Diagonal))
{
eDirection nextDirection = currentDirection.Turn(deltaDirection);
yield return(centrePoint.MoveOne(currentDirection).MoveOne(nextDirection));
}
}
// ReSharper disable once RedundantJumpStatement
yield break;
}
public static IEnumerable <eDirection> Enumerate(eDirection startingDirection = eDirection.North, eDirectionChange deltaDirection = eDirectionChange.Clockwise)
{
eDirection currentDirection = startingDirection;
for (int i = 0; i < 4; i++)
{
yield return(currentDirection);
currentDirection = currentDirection.Turn(deltaDirection);
}
// ReSharper disable once RedundantJumpStatement
yield break;
}
public static eDirection Turn(this eDirection currentDirection, eDirectionChange directionToMove)
{
return(FromInt((int)currentDirection + (int)directionToMove));
}
public IEnumerable <XYPoint> GetEdgeAdjacentPoints(
eDirection startingDirection = eDirection.North,
eDirectionChange deltaDirection = eDirectionChange.Clockwise)
{
return(GetAdjacentPoints(startingDirection, deltaDirection, eAdjacencyType.Orthogonal));
}
public static eDirection ApplyTo(this eDirectionChange change, eDirection originalDirection)
{
return(originalDirection.Turn(change));
}
public void DirectionEnumerationWorks(eDirection startingDirection, eDirectionChange deltaDirection, eDirection[] expectedOutput)
{
CollectionAssert.AreEqual(expectedOutput, DirectionAccessor.Enumerate(startingDirection, deltaDirection));
}
