private static HashSet <AoCPoint> FollowRoute(IEnumerable <char> directions, bool useRoboSanta)
{
var visitedHouses = new HashSet <AoCPoint>();
var directionQueue = new Queue <char>(directions);
var santaPosition = AoCPoint.Origin();
var roboSantaPosition = AoCPoint.Origin();
visitedHouses.Add(santaPosition);
var roboSantaTurn = false;
while (directionQueue.Any())
{
var d = directionQueue.Dequeue();
if (useRoboSanta && roboSantaTurn)
{
roboSantaPosition = VisitHouse(visitedHouses, roboSantaPosition, d);
}
else
{
santaPosition = VisitHouse(visitedHouses, santaPosition, d);
}
roboSantaTurn = !roboSantaTurn;
}
return(visitedHouses);
}
private static AoCPoint VisitHouse(HashSet <AoCPoint> visited, AoCPoint santaLocation, char d)
{
var currentLocation = santaLocation.MoveTo(d.GetDirection());
if (!visited.Contains(currentLocation))
{
visited.Add(currentLocation);
}
return(currentLocation);
}
public LightingInstruction(int ox, int oy, int ex, int ey, string change)
{
Origin = new AoCPoint(ox, oy);
End = new AoCPoint(ex, ey);
Switch = Enum.Parse <Switch>(change, true);
}
