private void InstantiateCriticalPathRooms()
{
int i = 0; // grid position we are currently spawning
int j = UnityEngine.Random.Range(0, 4); // grid position we are currently spawning
Direction?prev_dir = null;
bool hasPlacedExitDoor = false;
while (true)
{
//Debug.Log("running i=" + i + " j=" + j);
bool thisIsFirstRoom = prev_dir == null;
// where we can go from current i, j
Direction[] validDirections = Array.FindAll(allDirections, d =>
d != Direction.Top && // never go up
(j > 0 || d != Direction.Left) && // do not go left if we're at the leftmost room already
(j < 3 || d != Direction.Right) && // do not go right if we're at the rightmost room already
(i < 3 || d != Direction.Bottom) && // do not go bottom if we're at the lowest room already
(grid[i + d.IndexDelta().i, j + d.IndexDelta().j] == null) // do not go on an already spawned room
);
// chosen direction
Direction?dir = validDirections.GetRandNul();
// filter prefabs by rooms that have an entrance in the chosen exit direction
GameObject[] roomPrefabsThatHaveExitInChosenDir = Array.FindAll(roomPrefabs, rp =>
{
RoomSpec spec = rp.GetComponentInChildren <RoomSpec>(true);
return(spec != null &&
(prev_dir == null || spec.HasExit(prev_dir.Value.Invert())) && // entrance from previous dir
(dir == null || spec.HasExit(dir.Value)) && // exit in next dir
(!thisIsFirstRoom || spec.canSpawnPlayer) && // if this is the first room we are spawning, it must have a player spawn location
(dir != null || spec.hasExitDoor) // has exit door if it is last spawning room
);
}
);
// pick one randomly
GameObject roomPrefab = roomPrefabsThatHaveExitInChosenDir.GetRand();
if (roomPrefab == null)
{
throw new Exception("thisIsFirstRoom=" + thisIsFirstRoom + " add a room prefab that has an exit of type " + (dir != null ? dir.Value.ToString() : "null"));
}
// spawn
//Debug.Log("spawning i=" + i + " j=" + j);
float x = (j - 1) * roomSize - roomSize / 2;
float y = -((i - 1) * roomSize - roomSize / 2);
grid[i, j] = Instantiate(roomPrefab, new Vector3(x, y, 0), Quaternion.identity).GetComponent <RoomSpec>();
// place the player (already spawned) here
if (thisIsFirstRoom)
{
player.transform.position = grid[i, j].playerSpawnLocation.transform.position;
}
// put exit door and stop
if (dir == null)
{
exitDoor.transform.position = grid[i, j].exitSpawnLocation.transform.position;
break;
}
// save values as previous
prev_dir = dir;
// move pointers in the next dir
i += dir.Value.IndexDelta().i;
j += dir.Value.IndexDelta().j;
}
}
