private static void PrintMap(List <VirusCoord> virusCoords)
{
int minX = virusCoords.Min(x => x.X);
int minY = virusCoords.Min(x => x.Y);
int maxX = virusCoords.Max(x => x.X);
int maxY = virusCoords.Max(x => x.Y);
for (int y = minY; y <= maxY; y++)
{
for (int x = minX; x <= maxX; x++)
{
VirusCoord virusCoord = virusCoords.FirstOrDefault(v => v.X == x && v.Y == y);
if (virusCoord != null && virusCoord.Infected)
{
Console.Write("#");
}
else
{
Console.Write(".");
}
}
Console.WriteLine();
}
Console.WriteLine();
}
public static void Execute()
{
string[] inputs = File.ReadAllLines(@"C:\Work\Misc Projects\AdventOfCode\AdventOfCode\AdventOfCode\2017\Data\day22_full.txt");
string input = string.Join("", inputs);
int width = inputs[0].Length;
int half = (int)Math.Floor((double)width / 2);
List <VirusCoord> virusCoords = PopulateVirusCoords(input, half, inputs);
//PrintMap(virusCoords);
int direction = ScannerDirections.Up;
int x = 0;
int y = 0;
int count = 0;
for (int step = 1; step <= 10000; step++)
{
VirusCoord virusCoord = virusCoords.FirstOrDefault(v => v.X == x && v.Y == y);
if (virusCoord == null)
{
virusCoord = new VirusCoord
{
X = x,
Y = y,
Infected = false
};
virusCoords.Add(virusCoord);
}
direction = ChangeDirection(virusCoord, direction);
bool infected = !virusCoord.Infected;
if (infected)
{
count++;
}
virusCoord.Infected = infected;
Move(direction, ref x, ref y);
//PrintMap(virusCoords);
}
Console.WriteLine(count);
}
private static int ChangeDirection(VirusCoord virusCoord, int direction)
{
if (virusCoord.Infected)
{
switch (direction)
{
case ScannerDirections.Up:
return(ScannerDirections.Right);
case ScannerDirections.Right:
return(ScannerDirections.Down);
case ScannerDirections.Down:
return(ScannerDirections.Left);
case ScannerDirections.Left:
return(ScannerDirections.Up);
default:
throw new ArithmeticException();
}
}
else
{
switch (direction)
{
case ScannerDirections.Up:
return(ScannerDirections.Left);
case ScannerDirections.Right:
return(ScannerDirections.Up);
case ScannerDirections.Down:
return(ScannerDirections.Right);
case ScannerDirections.Left:
return(ScannerDirections.Down);
default:
throw new ArithmeticException();
}
}
}
private static List <VirusCoord> PopulateVirusCoords(string input, int half, string[] inputs)
{
List <VirusCoord> virusCoords = new List <VirusCoord>();
int index = 0;
for (int y = -half; y <= half; y++)
{
for (int x = -half; x <= half; x++)
{
VirusCoord virusCoord = new VirusCoord
{
X = x,
Y = y,
Infected = input[index].ToString().Equals("#")
};
virusCoords.Add(virusCoord);
index++;
}
}
return(virusCoords);
}
