GetDoorwayClosestToGoal.cs

private Doorway GetNextDoorwayClosestToEndTile(Tile currentTile)
{
	// Loop through all active doorways for the tile we're currently in
	foreach (var doorway in currentTile.Placement.UsedDoorways)
	{
		var adjacentTile = doorway.ConnectedDoorway.Tile; // Get the tile connected by this doorway

		if (currentTile.Placement.IsOnMainPath)
		{
			// We're already on the main path
			// If the adjacent tile is further along the main path than the current tile, it's closer to the goal
			if (adjacentTile.Placement.NormalizedPathDepth > currentTile.Placement.NormalizedPathDepth)
				return doorway;
		}
		else
		{
			// We're on a branch
			// If the adjacent tile is on the main path or it's closer to the beginning of the branch, it's closer to the goal
			if (adjacentTile.Placement.IsOnMainPath || adjacentTile.Placement.NormalizedBranchDepth < currentTile.Placement.NormalizedBranchDepth)
				return doorway;
		}
	}

	throw new Exception("No closest tile found. This should never happen");
}