Thanks for the comment! Lots more to come!

Agreed 100%. This content is insane, it's above the level of most paid courses as well, I still can't believe we get something this good on youtube. Git-amend is a true hero.

same here :)

I, for one, welcome our new Unity tutorial overlords.

So far it's the only unity dev channel that actually codes properly. The last was infallable code but they stoped posting.

Too kind!

Thank you so much!

Thanks so much! I really appreciate the comment.

Awesome, thank you!

I don't yet, but that is a very requested video. Sometime this year I will make a video like that. Thanks!

@@git-amend looking forward for this one too!!

Great! Some of the paid Assets are very good, let me know if you buy one!

Thanks!

Thanks, will do! Appreciate the comment!

Interesting, thanks for sharing that.

Thanks for the comment, made my day!

Thanks for the vote of confidence!

Thanks!

That's Excalidraw for Obsidian. You can also use the web version: excalidraw.com/ kzfaq.info/get/bejne/pZaVq65e3ay0Y58.html

He has tried a few in the past. I don't know which one he is using here. Might be listed in the Discord.

Thanks for the comment! I'm sure other people will have similar questions. First of all, make sure to start adding a version number as soon as you think you are going to have to maintain multiple versions of saved data - some kind of id system, even if it's just an integer. After that, the easiest thing to do is to implement a migration strategy. When you deserialize using Unity's Json library, missing fields in your saved data (the new fields in the GameData class) are set to the default values. Check the version number and then handle migration if you need to set those new fields to something special.

@@git-amend Thanks for your answer, that's helpful!

You could do that, but it would defeat the purpose of binding data as shown in this video. Most naïve systems do exactly what you are describing - the trade off is that you then have to have each of these ISaveable classes register and deregister for events and implement their own save/load logic which could become cumbersome. You then have to decide if you want each entity to save into it's own data file or combine them all somehow.

That's an interesting question. I would imagine the main pro of one file is simplicity. There would also only be only one read or write operation performed, which might be an advantage in some scenarios. The flip side of course are advantages you've already pointed out, and beyond that you might want to be able to save data more frequently for some game objects than for others, depending on your game. I think it really comes down to a per project level, but definitely something to consider.

Had to implement something similar, as my use of assemblies did not allow for having one concrete GameData class. What I did was have each SaveSlot as a folder, and then one file for each ISaveable.

You will probably want to look into a solution for serializing Dictionaries or create your own. There are some free ones on the asset store / GitHub.

If you take a look in the repository, there is an extra commit made after this video's code that adds support for scriptable objects save/load. It is fairly straight forward.

That's called Better Transform by Tiny Giant Studio, they also have an improvement for the Mesh Renderer component as well: assetstore.unity.com/packages/tools/utilities/better-transform-real-size-global-local-switch-and-child-parent--258314

Thank you so much

Well, that's a difficult question to answer without seeing your entire project. If you are following along with the video, you'll notice there is a Bind method that can handle Lists of things for saving, and that could include a list of Enemies and their positions. You would need to tie this into your spawning system, so that as you spawn enemies into (and out of) your game you keep this list up to date. Then when the game is saved you should be able to save a list of all the enemy positions on the level and when the game starts up your spawning system can put them back into the right places, potentially with all the same data. You would do the same thing for items and so on.

I see, I'll try that out! Thanks for the feedback, I think this is the answer I'm looking for!

By the way, this week's topic is very interesting as always. Thank you very much for making videos with such high quality content.

I have another plan already for next week - but a video about an audio system would be a good topic. What kind of features would you want to include in such a system?

@@git-amend I feel like I don't pay enough attention to sound in the games I make. In the last game I made, I tried to do something by combining your flyweight factory with the audio system, but I messed up. It would be perfect if you made a sound system video where we can use Audio Sources in a more optimized way.

@@git-amend Would be neat to see how to get unity setup with fmod or wwise if you've ever used those. From a feature standpoint...general system setup, playing one off sounds, playing looping sounds, spatial audio relative to player. Basic music stuff could be cool too like a system to manage current song, transitioning, looping. I know fmod has some variable connections to control multi channel audio stuff and apply audio effects and filters (like different reverb values depending on indoor/outdoor for example).

For more complex types that aren't supported out of the box with Unity's built in tools, most people will use the Newtonsoft-JSON package. Check it out here: docs.unity3d.com/Packages/com.unity.nuget.newtonsoft-json@3.0/manual/index.html Specific Dictionary example: www.newtonsoft.com/json/help/html/SerializeDictionary.htm

@@git-amend Awesome thank you so much for the reply, I appreciate it.

great video btw! Another immediate watch for me.

Thanks for the comment! The SerializableGuid class is just an example of how you can serialize a Guid. I personally don't find it to be complicated, but of course you should implement whatever identification system is suitable for you and your project. As for optimizations of loading resources and so on, those are important things, but they are topics for another video. I wouldn't typically use Resources.Load, however I knew that if I did not add something to the repository, people would complain. We'll have a video about Asset Bundles and Addressables in the near future, and address some of these concerns about loading and memory. Cheers!

Thank you! Cheers!

There could be many reasons for this, so this question can't be answered without more information. You'll have to compare your code carefully to what's in the repository.

@@git-amend Thanks for the quick reply! I'll look into it. Great video!!

Are you using the PropertyDrawer from the repository?

@@git-amend thanks for the quick reply. Indeed, it seems the issue was with the SerializableGuidDrawer class to showcase it properly. I'll continue testing your approach. Just cloning the repo itself is not possible since it has dependencies and missing entities. But for now all good :)

​@@git-amend I encountered another problem (just for me I hope). When I start playing it goes to the default persistent property state. I did everything as in the tutorial of yours (This is my hero): public void Bind(PlayerData data) { _playerData = data; _playerData.Id = Id; transform.position = data.Position; } private void Update() { _playerData.Position = transform.position; } And it goes always transform.position = data.Position; (in your video it does not for some reason) but I wanna it to happen only on load. If I fix I'll let you know. P.S. Long story short on each play it goes to default position of the data I store in GameData The way I had to do it is the following but you in your videos did not have this check and I can not wrap my head around why: public void Bind(PlayerData data) { _playerData = data; _playerData.Id = Id; // Check if the loaded position is not the default Vector3(0,0,0) or any other invalid position if (_playerData.Position != Vector3.zero) { transform.position = _playerData.Position; } else { // Optionally, set a default starting position here // transform.position = defaultStartingPosition; } } Maybe for you this check works if (data == null) { data = new TData { Id = entity.Id }; } but for me it never does since GameData always exists

I think your hero is also sent to (0,0,0) :) I rewatched your video many times and that's the most logical conclusion I can get. This is on timestep 12:36

@@nanaschi Did you ever find a solution to things going back to (0,0,0)? I'm having the same problem (mine is 0,0 since i'm working on a 2d game)

Instance Ids are liable to change. The system can be improved by using the SerializeableGuid of each asset instead. I've added another commit to the repository to show how that can be done.

That's Excalidraw for Obsidian. You can also use the web version: excalidraw.com/ kzfaq.info/get/bejne/pZaVq65e3ay0Y58.html

@@git-amend Thank you!

@@git-amendThanks a lot!

Sure, you don't have to wrap any of the data in the GameData object - it could all be separate if you wanted to. The main wrapper is more of a convenience object, and would make it a bit easier if you needed to start versioning for example.

@@git-amend Thank you !! Great video btw

In that case you might want to start using the Bind(List datas) method so that you can associate each unique Inventory with a matching Id (the Id denoting the owner of the Inventory).

so itd be like Bind ?@@git-amend

Very astute. As mentioned in the pinned comment and description, you can see an implementation in the repository.

@@git-amend Thx, i will look into it. What you also need to implement is deleting objects from scene after loading if they were deleted before. What i do in my system is, after loading, delete everything which saveable in the scene and create everything from the save file.

Great, I hope it inspires you to build something awesome!

Sure! Unity supports Base64 out-of-the-box - check out the end of this article for how to use it: pudding-entertainment.medium.com/unity-how-to-save-and-load-files-using-json-and-base64-a033def09a47

That is ExcaliDraw for ObsidianØ kzfaq.info/get/bejne/pZaVq65e3ay0Y58.html

Look up how it works. The odds are for all practical purposes zero.

Do mean in as far as determining what to save and binding the data, or performing an actual save of the data?

A script to save and load everything at once instead of identifying every little thing I want

Yes, you can just use `set` instead, in fact it's been changed in the repository already based on subscriber feedback - and discussed on Discord, feel free to join, you'll find a lot of answers there to things like this and more!

@@git-amend Ohh, thank you so much!! I will try to join asap!