public string Solve(string data)
{
var vm = new AsyncIntCodeVm(data);
vm.InputBuffer.Post(1);
int direction = 0; // Facing up
var location = new Point(0, 0);
var paintedLocations = new HashSet <Point>(); // So we won't get dupes
// Initialise with current location as white
var hullLocationColours = new Dictionary <Point, long>()
{
{ location, 1 },
};
Task vmTask = vm.ExecuteAsync();
while (!vmTask.IsCompleted)
{
// Get the colour
long colour;
try
{
colour = vm.OutputBuffer.Receive(TimeSpan.FromMilliseconds(10));
}
catch (Exception)
{
if (vmTask.IsCompleted)
{
// Edge case. We managed to loop between reading the last value and before the program properly ended.
// This is OK, and we just break out of the loop and write the answer.
break;
}
throw;
}
// Paint
hullLocationColours[location] = colour;
paintedLocations.Add(location);
// Get the location change
long turn = vm.OutputBuffer.Receive(TimeSpan.FromMilliseconds(10));
// Turn and move
direction = (direction + (turn == 0 ? -1 : 1) + 4) % 4;
location = new Point(location.X + Directions[direction].X, location.Y + Directions[direction].Y);
hullLocationColours.TryGetValue(location, out colour); // If there is no value, colour gets set to default(long), i.e. 0
vm.InputBuffer.Post(colour);
}
// Build the visualisation; remove black locations from the list to ensure we only visualise what's needed.
StringBuilder display = this.BuildVisualisation(hullLocationColours);
return(display.ToString());
}
public string Solve(string data)
{
var vm = new AsyncIntCodeVm(data);
vm.InputBuffer.Post(0);
int direction = 0; // Facing up
var location = new Point(0, 0);
var paintedLocations = new HashSet <Point>(); // So we won't get dupes
var hullLocationColours = new Dictionary <Point, long>();
Task vmTask = vm.ExecuteAsync();
// Assuming we'll always get outputs in pairs. If not, we'd need to check between the two Receive calls.
while (!vmTask.IsCompleted)
{
// Get the colour
long colour = vm.OutputBuffer.Receive(TimeSpan.FromSeconds(1));
// Paint
hullLocationColours[location] = colour;
paintedLocations.Add(location);
// Get the location change
long turn = vm.OutputBuffer.Receive(TimeSpan.FromSeconds(1));
// Turn and move
direction = (direction + (turn == 0 ? -1 : 1) + 4) % 4;
location = new Point(location.X + Directions[direction].X, location.Y + Directions[direction].Y);
// Post colour of current location to VM
hullLocationColours.TryGetValue(location, out colour); // If there is no value, colour gets set to default(long), i.e. 0
vm.InputBuffer.Post(colour);
}
return(paintedLocations.Count.ToString());
}