private void DrawMap(Dictionary <Coordinate, char> map, Droid droid)
{
var minX = map.Keys.Select(coord => coord.X).Append(droid.CurrentLocation.X).Min() - 5;
var minY = map.Keys.Select(coord => coord.Y).Append(droid.CurrentLocation.Y).Min() - 5;
var maxX = map.Keys.Select(coord => coord.X).Append(droid.CurrentLocation.X).Max() + 5;
var maxY = map.Keys.Select(coord => coord.Y).Append(droid.CurrentLocation.Y).Max() + 5;
for (int y = minY; y < maxY; y++)
{
for (int x = minX; x < maxX; x++)
{
var coord = Coordinate.Create(x, y);
if (coord.Equals(droid.CurrentLocation))
{
Console.Write('D');
}
else if (map.ContainsKey(coord))
{
Console.Write(map[coord]);
}
else
{
Console.Write(' ');
}
}
Console.WriteLine();
}
}
public object Work1()
{
var comp = new IntCodeComp(input);
var droid = new Droid(comp);
var map = new Dictionary <Coordinate, char>
{
{ droid.CurrentLocation, 'S' }
};
droid.Start();
int distance = FindOxygenLocation(droid, map);
var oxygenCoord = map.Single(m => m.Value == '@').Key;
DrawMap(map, droid);
return(distance);
}
private int FindOxygenLocation(Droid droid, Dictionary <Coordinate, char> map)
{
AddIfNotExists(droid.CurrentLocation, 0);
int oxygenDistance = -1;
while (oxygenDistance == -1 || map.Count < 1650)
{
var east = Coordinate.Create(droid.CurrentLocation.X + 1, droid.CurrentLocation.Y);
var west = Coordinate.Create(droid.CurrentLocation.X - 1, droid.CurrentLocation.Y);
var north = Coordinate.Create(droid.CurrentLocation.X, droid.CurrentLocation.Y - 1);
var south = Coordinate.Create(droid.CurrentLocation.X, droid.CurrentLocation.Y + 1);
// explore unkown space
Direction dir = Direction.None;
if (!map.ContainsKey(east))
{
dir = Direction.East;
}
else if (!map.ContainsKey(south))
{
dir = Direction.South;
}
else if (!map.ContainsKey(north))
{
dir = Direction.North;
}
else if (!map.ContainsKey(west))
{
dir = Direction.West;
}
// trace back through known territory
if (dir == Direction.None)
{
if (map[east] != '#')
{
dir = Direction.East;
}
else if (map[south] != '#')
{
dir = Direction.South;
}
else if (map[west] != '#')
{
dir = Direction.West;
}
else if (map[north] != '#')
{
dir = Direction.North;
}
// add previous visits to path calculation
var surroundings = new Dictionary <Coordinate, int>();
if (droid.VisitedCoords.ContainsKey(east))
{
surroundings.Add(east, droid.VisitedCoords[east]);
}
if (droid.VisitedCoords.ContainsKey(west))
{
surroundings.Add(west, droid.VisitedCoords[west]);
}
if (droid.VisitedCoords.ContainsKey(north))
{
surroundings.Add(north, droid.VisitedCoords[north]);
}
if (droid.VisitedCoords.ContainsKey(south))
{
surroundings.Add(south, droid.VisitedCoords[south]);
}
if (surroundings.Values.Distinct().Count() > 1)
{
int leastVisited = surroundings.Values.Min();
var leastVisitedCoord = surroundings.First(s => s.Value == leastVisited).Key;
if (leastVisitedCoord == east)
{
dir = Direction.East;
}
else if (leastVisitedCoord == west)
{
dir = Direction.West;
}
else if (leastVisitedCoord == north)
{
dir = Direction.North;
}
else if (leastVisitedCoord == south)
{
dir = Direction.South;
}
}
}
int lastDistance = distance[droid.CurrentLocation];
char c = droid.MoveDirection(dir);
AddIfNotExists(droid.CurrentLocation, lastDistance + 1);
if (c == '@')
{
oxygenDistance = distance[droid.CurrentLocation];
}
if (!map.ContainsKey(droid.CurrentLocation))
{
map.Add(droid.CurrentLocation, c);
}
else if (c == '#')
{
switch (dir)
{
case Direction.North:
if (!map.ContainsKey(north))
{
map.Add(north, '#');
}
break;
case Direction.South:
if (!map.ContainsKey(south))
{
map.Add(south, '#');
}
break;
case Direction.West:
if (!map.ContainsKey(west))
{
map.Add(west, '#');
}
break;
case Direction.East:
if (!map.ContainsKey(east))
{
map.Add(east, '#');
}
break;
case Direction.None:
default:
throw new Exception("Invalid direction. This should never happen.");
}
}
/*Console.Clear();
* DrawMap(map, droid);*/
}
return(oxygenDistance);
}
