public void TestGetNextPoint()
{
GridPoint point = new GridPoint(2, 3);
GridPoint nextPoint;
nextPoint = point.GetNextPoint(Direction.DOWN);
Assert.AreEqual(new GridPoint(1, 3), nextPoint);
nextPoint = point.GetNextPoint(Direction.LEFT);
Assert.AreEqual(new GridPoint(2, 2), nextPoint);
nextPoint = point.GetNextPoint(Direction.LEFT_DOWN);
Assert.AreEqual(new GridPoint(1, 2), nextPoint);
nextPoint = point.GetNextPoint(Direction.LEFT_UP);
Assert.AreEqual(new GridPoint(3, 2), nextPoint);
nextPoint = point.GetNextPoint(Direction.RIGHT);
Assert.AreEqual(new GridPoint(2, 4), nextPoint);
nextPoint = point.GetNextPoint(Direction.RIGHT_DOWN);
Assert.AreEqual(new GridPoint(1, 4), nextPoint);
nextPoint = point.GetNextPoint(Direction.RIGHT_UP);
Assert.AreEqual(new GridPoint(3, 4), nextPoint);
nextPoint = point.GetNextPoint(Direction.UP);
Assert.AreEqual(new GridPoint(3, 3), nextPoint);
}
/// <summary>
/// Field boundary with a unique representation. For example,
/// if this is called once with (0, 0) UP and once with (1, 0) DOWN
/// then both represent the same boundary and are equal.
/// </summary>
/// <param name="basePoint"> Point which has the boundary </param>
/// <param name="directionFromBase"> Direction of the boundary relative to the base point </param>
public FieldBoundary(GridPoint basePoint, Direction directionFromBase)
{
// Unique representation for the same boundary
if (!baseDirections.Contains(directionFromBase))
{
basePoint = basePoint.GetNextPoint(directionFromBase);
directionFromBase = directionFromBase.GetOpposite();
}
BasePoint = basePoint;
DirectionFromBase = directionFromBase;
}
/// <summary>
/// A segment of field changes
/// </summary>
/// <param name="startPoint"> Starting point </param>
/// <param name="direction"> Direction to continue from the starting point </param>
/// <param name="values"> Field values of the changes </param>
public FieldsToChange(GridPoint startPoint, Direction direction, IEnumerable <T> values) : this()
{
if (values == null)
{
throw new ArgumentNullException();
}
GridPoint currentPoint = startPoint;
foreach (T v in values)
{
Add(currentPoint, v);
currentPoint = currentPoint.GetNextPoint(direction);
}
}