private void Recalibrate()
{
// Recalculate preferences when there are more than 1 Direction that can be taken from the current Coordinates.
var moves = 0;
if (CanMove(Direction.North))
{
moves++;
}
if (CanMove(Direction.South))
{
moves++;
}
if (CanMove(Direction.East))
{
moves++;
}
if (CanMove(Direction.West))
{
moves++;
}
var needsCalibration = moves > 1;
if (NavigationMode == CrawlerNavigationMode.Scout && needsCalibration)
{
_preference = DirectionHelper.GetPreferences(_current, _destination);
Trace($"Recalibrated preference: {string.Join(',', _preference )}.");
}
}
public void GetPreferences_Should_Prefer_Horizontal_Component_If_Distance_Is_The_Same()
{
var start = new Coordinates(5, 5);
var destination = new Coordinates(1, 1);
var actual = DirectionHelper.GetPreferences(start, destination);
actual[0].Should().Be(Direction.West);
actual[1].Should().Be(Direction.North);
}
public void GetPreferences_Should_Make_Preferences_Based_On_Distance(int destinationX, int destinationY, Direction first, Direction second)
{
var start = new Coordinates(2, 2);
var destination = new Coordinates(destinationX, destinationY);
var actual = DirectionHelper.GetPreferences(start, destination);
actual[0].Should().Be(first);
actual[1].Should().Be(second);
}
public void GetPreferences_Should_Prefer_North_If_Vertical_Component_Is_The_Same()
{
var start = new Coordinates(1, 1);
var destination = new Coordinates(5, 1);
var actual = DirectionHelper.GetPreferences(start, destination);
actual[1].Should().Be(Direction.North);
actual[2].Should().Be(Direction.South);
}
public void GetPreferences_Should_Make_Preferences_Based_On_Vertical_Component(int startY, int destinationY, Direction first, Direction last)
{
var start = new Coordinates(0, startY);
var destination = new Coordinates(0, destinationY);
var actual = DirectionHelper.GetPreferences(start, destination);
actual.First().Should().Be(first);
actual.Last().Should().Be(last);
}
public void GetPreferences_Should_Make_Preferences_Based_On_Horizontal_Component(int startX, int destinationX, Direction first, Direction last)
{
var start = new Coordinates(startX, 0);
var destination = new Coordinates(destinationX, 0);
var actual = DirectionHelper.GetPreferences(start, destination);
actual.First().Should().Be(first);
actual.Last().Should().Be(last);
}
public MazeCrawler(MazeCrawlerContext context)
{
Id = Guid.NewGuid().ToString();
CrawlerMap = context.NavigationMap;
NavigationMode = context.NavigationMode;
_coordinator = context.Coordinator;
_start = _current = context.Start;
_destination = context.Destination;
_stepsTaken = new Queue <char>();
_preference = DirectionHelper.GetPreferences(_start, _destination);
}