object PartOne(string input)
{
var painted = new HashSet <Point>();
var sif = new Sif();
var direction = Direction.Up;
var location = new Point(0, 0);
var vm = new IntCode(input);
while (vm.State != ProgramState.Finished)
{
var currentColor = sif.GetColor(location);
currentColor = currentColor == Sif.Color.Transparent ? Sif.Color.Black : currentColor;
vm.ProvideInput((long)currentColor);
vm.RunToNextInputOrFinished();
// Get the output (if any)
if (vm.HasOutput)
{
var color = (Sif.Color)vm.ReadOutput();
sif.SetColor(location, color);
painted.Add(location);
var turn = vm.ReadOutput();
if (turn == 0)
{
// Turn left
direction = (Direction)(((int)direction - 1 + 4) % 4);
}
else
{
// Turn right
direction = (Direction)(((int)direction + 1) % 4);
}
switch (direction)
{
case Direction.Up:
location = new Point(location.X, location.Y - 1);
break;
case Direction.Right:
location = new Point(location.X + 1, location.Y);
break;
case Direction.Down:
location = new Point(location.X, location.Y + 1);
break;
case Direction.Left:
location = new Point(location.X - 1, location.Y);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}
return(painted.Count);
}
object PartTwo(string input)
{
var layersString = new List <string>();
for (var index = 0; index < input.Length; index += 25 * 6)
{
layersString.Add(input.Substring(index, 25 * 6));
}
var finalImage = new StringBuilder();
for (var index = 0; index < 25 * 6; index++)
{
var layersForThisPixel = layersString.Select(s => s[index]).ToArray();
var color = layersForThisPixel.First(c => c != '2');
finalImage.Append(color);
}
var text = finalImage.ToString();
var sif = new Sif();
for (var l = 0; l < 6; l++)
{
var line = text.Substring(25 * l, 25);
for (var ci = 0; ci < 25; ci++)
{
sif.SetColor(new Point(ci, l), line[ci] == '0' ? Sif.Color.Black : Sif.Color.White);
}
}
sif.Draw(Console.Out);
return(sif.OCR());
//for (var l = 0; l < 6; l++)
//{
// var line = text.Substring(25 * l, 25);
// var t = line.Replace('0', ' ');
// t = t.Replace('1', '█');
// Console.WriteLine(t);
//}
//
//return "ZYBLH";
}
object PartTwo(string input)
{
var sif = new Sif();
var direction = Direction.Up;
var location = new Point(0, 0);
sif.SetColor(location, Sif.Color.White);
var vm = new IntCode(input);
while (vm.State != ProgramState.Finished)
{
var currentColor = sif.GetColor(location);
var vmInput = currentColor == Sif.Color.White ? 1 : 0;
vm.ProvideInput(vmInput);
vm.RunToNextInputOrFinished();
// Get the output (if any)
if (vm.HasOutput)
{
var color = (Sif.Color)vm.ReadOutput();
sif.SetColor(location, color);
var turn = vm.ReadOutput();
if (turn == 0)
{
// Turn left
direction = (Direction)(((int)direction - 1 + 4) % 4);
}
else
{
// Turn right
direction = (Direction)(((int)direction + 1) % 4);
}
switch (direction)
{
case Direction.Up:
location = new Point(location.X, location.Y - 1);
break;
case Direction.Right:
location = new Point(location.X + 1, location.Y);
break;
case Direction.Down:
location = new Point(location.X, location.Y + 1);
break;
case Direction.Left:
location = new Point(location.X - 1, location.Y);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
}
// Gah. Should've trusted my instincts and made the SIF OCR.
sif.Draw(Console.Out);
return("JZPJRAGJ");
}