public void AlignToOther(Direction dir, MapTile other)
{
isAligned = true;
adjecentTiles[dir] = other;
}
public override void Solve()
{
StreamReader sr = new StreamReader("Inputs/day20.txt");
MapTile t = null;
int index = 0;
while (!sr.EndOfStream)
{
string line = sr.ReadLine();
if (line.Contains("Tile"))
{
if (t != null)
{
allTiles.Add(t);
}
t = new MapTile();
t.tileId = int.Parse(Regex.Match(line, @"\d+").Value);
index = 0;
}
else
{
for (int i = 0; i < line.Length; i++)
{
if (line[i] == '.' || line[i] == '#')
{
t.pixels[index, i] = line[i];
}
}
index++;
}
}
allTiles.Add(t);
/*PrintTile(allTiles[0]);
* Console.WriteLine("");
* allTiles[0].Rotate(true);
* PrintTile(allTiles[0]);
* allTiles[0].Rotate(false);
* Console.WriteLine("");
* PrintTile(allTiles[0]);*/
List <MapTile> freeTiles = new List <MapTile>(allTiles);
Queue <MapTile> toCheck = new Queue <MapTile>();
freeTiles[0].x = 0;
freeTiles[0].y = 0;
toCheck.Enqueue(freeTiles[0]);
while (toCheck.Count > 0)
{
MapTile currentTile = toCheck.Dequeue();
//freeTiles.Remove(currentTile);
foreach (MapTile.Direction dir in currentTile.adjecentTiles.Keys.ToList())
{
if (currentTile.adjecentTiles[dir] != null)
{
continue;
}
char[] edgeRow = currentTile.GetEdgeRowByDirection(dir);
foreach (MapTile otherTile in freeTiles)
{
bool isAligning = false;
for (int flip = 0; flip <= 3; flip++) //0=no flip, 1=flipx, 2=flipy, 3=flipxy
{
//MapTile copy = new MapTile(otherTile);
if (flip == 1)
{
otherTile.Flip(true);
}
else if (flip == 2)
{
otherTile.Flip(false);
}
else if (flip == 3)
{
otherTile.Flip(true);
otherTile.Flip(false);
}
for (int rot = 0; rot <= 4; rot++)
{
MapTile.Direction otherDir = (MapTile.Direction)((((int)dir) + 2) % 4);
char[] otherRow = otherTile.GetEdgeRowByDirection(otherDir);
if (MapTile.AreRowsEqual(edgeRow, otherRow))
{
isAligning = true;
break;
}
otherTile.Rotate(true);
}
if (isAligning)
{
break;
}
}
if (isAligning)
{
currentTile.adjecentTiles[dir] = otherTile;
otherTile.adjecentTiles[(MapTile.Direction)((((int)dir) + 2) % 4)] = currentTile;
freeTiles.Remove(otherTile);
toCheck.Enqueue(otherTile);
switch (dir)
{
case MapTile.Direction.Top:
otherTile.y = currentTile.y - 1;
otherTile.x = currentTile.x;
break;
case MapTile.Direction.Right:
otherTile.x = currentTile.x + 1;
otherTile.y = currentTile.y;
break;
case MapTile.Direction.Bottom:
otherTile.y = currentTile.y + 1;
otherTile.x = currentTile.x;
break;
case MapTile.Direction.Left:
otherTile.x = currentTile.x - 1;
otherTile.y = currentTile.y;
break;
}
break;
}
}
}
if (currentTile.adjecentTiles.Count(x => x.Value == null) >= 3)
{
freeTiles.Add(currentTile);
}
}
//PrintMap();
int minY = allTiles.Min(x => x.y);
int minX = allTiles.Min(x => x.x);
int maxY = allTiles.Max(x => x.y);
int maxX = allTiles.Max(x => x.x);
ulong p1 = (ulong)allTiles.First(x => x.x == minX && x.y == minY).tileId *
(ulong)allTiles.First(x => x.x == minX && x.y == maxY).tileId *
(ulong)allTiles.First(x => x.x == maxX && x.y == minY).tileId *
(ulong)allTiles.First(x => x.x == maxX && x.y == maxY).tileId;
Console.WriteLine($"Part 1: {p1}");
MapTile fullMap = new MapTile();
fullMap.pixels = new char[(MapTile.tileSize - 2) * (int)Math.Sqrt(allTiles.Count), (MapTile.tileSize - 2) * (int)Math.Sqrt(allTiles.Count)];
List <MapTile> orderedTiles = allTiles.OrderBy(x => x.x).OrderBy(x => x.y).ToList();
int lastY = 0;
int lastX = 0;
foreach (MapTile mt in allTiles)
{
mt.RemoveBorders();
mt.y -= minY;
mt.x -= minX;
}
//PrintMap();
for (int i = 0; i < orderedTiles.Count; i++)
{
if (orderedTiles[i].y != lastY)
{
lastY = orderedTiles[i].y;
}
if (orderedTiles[i].x != lastX)
{
lastX = orderedTiles[i].x;
}
for (int j = 0; j < orderedTiles[i].pixels.GetLength(0); j++)
{
for (int l = 0; l < orderedTiles[i].pixels.GetLength(1); l++)
{
int yindx = lastY * (orderedTiles[i].pixels.GetLength(0)) + j;
int xindx = lastX * (orderedTiles[i].pixels.GetLength(1)) + l;
fullMap.pixels[yindx, xindx] = orderedTiles[i].pixels[j, l];
}
}
}
//example map is rotated once right and flipped by x
MapTile.tileSize = fullMap.pixels.GetLength(0);
//fullMap.Rotate(true);
//fullMap.Flip(true);
CreateMonsterTemplate();
int monsterCount = 0;
int roughness = 0;
bool monsterFound = false;
for (int flip = 0; flip < 4; flip++)
{
if (monsterFound)
{
break;
}
if (flip == 1)
{
fullMap.Flip(true);
}
else if (flip == 2)
{
fullMap.Flip(false);
}
else if (flip == 3)
{
fullMap.Flip(true);
fullMap.Flip(false);
}
for (int r = 0; r <= 4; r++)
{
if (monsterFound)
{
break;
}
fullMap.Rotate(true);
roughness = 0;
for (int y = 0; y < fullMap.pixels.GetLength(0); y++)
{
for (int x = 0; x < fullMap.pixels.GetLength(1); x++)
{
if (fullMap.pixels[y, x] == '#')
{
List <Tuple <int, int> > monsterPixels = IsMonster(fullMap, x, y);
if (monsterPixels != null)
{
monsterFound = true;
monsterCount++;
foreach (Tuple <int, int> mp in monsterPixels)
{
fullMap.pixels[mp.Item1, mp.Item2] = 'O';
}
}
else
{
roughness++;
}
}
}
}
}
}
PrintMap(fullMap);
Console.WriteLine($"Part 2: Monster count: {monsterCount}, roughness = {roughness}");
}
