How to serialized 2d array of TileBase?

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So i made a room script to help prototyping rooms faster and it would save all the tiles (TileBase) in a 2d array. The problem with that is when i entered play mode the array would be reset and become null. Ater a little research i knew that multidimensional array couldn't be serializable so i tried to use binaryformatter and memorystream to serialized it but failed. Then i learned that i can only use that if TileBase itself is serializable but it's not. So are there any ways to do this?

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Answer by Long2904 · Apr 03, 2020 at 01:05 PM

Okay i figured it out! Make a serializable class that store the tilebase (this class don't inheritant from mono behaviour) and have reference to this class instead. For example:

Before:

 public class Rooms : MonoBehaviour
     {
         private TileBase[,] allTiles;
         private Matrix4x4[,] tilesRotation;
     }

After:

 public class Rooms : MonoBehaviour
     {
         public[] SerializableTile serializableTiles;
 
 [Serializable] // this is the class unity will save so don't inheritant from mono behaviour.
     public class SerializableTile
     {
         public TileBase tile;
         public Matrix4x4 rotation;
 
         public SerializableTile(TileBase _tile, Matrix4x4 _rotation)
         {
             tile = _tile;
             rotation = _rotation;
         }
     }
     }

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Tomatech · Apr 15, 2020 at 11:06 AM 0

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Thank you! I had been building my save system under the assumption that TileBase could not be serialized, knowing that it can has made things much easier. Stay safe during the CoralVita$$anonymous$$

HuldaGnodima · Apr 02, 2021 at 10:27 AM 0

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Could you share how you then save the TileBases? I'm using json/Easy Save, but for some reason some TileBases can't be found upon loading (it's like they dissappear in the saving process). If you got it to work I would LOVE to see how to do it!

Tomatech HuldaGnodima · Apr 04, 2021 at 12:46 AM 0

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Ah... since then, I found out that this solution was serializing tiles as scriptableObject instances, which can change periodically. At the time, I assumed it worked because the instance id’s weren’t changing.

The simple way: create a dictionary of all tiles you want to save (before starting the game). On start, generate a second dictionary that swaps the keys and values of the first dictionary. When saving, use the tileBase as a key to get an int/string to save the time as. When loading, use the other dictionary to turn that string/int back into a tileBase. This will work even for extended tiles like rule tiles

HuldaGnodima Tomatech · Apr 04, 2021 at 07:23 AM 0

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Thank you so much for replying!

I also found out that their ID will change periodically, and yesterday I did a similar solution as the one you're describing. I made a Dictionary that holds tile-names and the tile connected to that name. Everytime I save, I save the name of the tile connected to a tile-coordinate, I then use the name to replace all the tiles when I load.

Your solution sounds a little simpler even! If you wouldn't $$anonymous$$d I would LOVE to see your code how you load/save the tiles specifically? I really searched the web for like 3 days finding nothing, so if you feel comfortable sharing I really think it could be a help to a lot of people!

Again thank you for your reply :)

How to serialized 2d array of TileBase?

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