Need help with preserving puzzle solving between Scenes

[suzuuzu]

I am trying to make a puzzle game and set up my game to have a hub world and 4 different rooms to collect puzzles/interact with stuff. I am very new to unity and I set up a scene switch button going to the start of one scene

• Inside Hub there is a button goes to “Door 1” scene

• Inside Door 1 is a button that does to “Hub” scene

I have objects that can be moved in the door scenes, but when I press play and move from Hub → Door 1 → Hub → Door 1, stuff from the Door 1 scene has been reset. Is there a way to make it so the object stays in the same place/a puzzle will still be solved/people have already been talked to when going to that scene? I tried Object.DontDestoryOnLoad, but it keeps it on every scene. I just need it to stay in the same state as before when going back to that scene since everything will be localized in that area.

[Kurt-Dekker]

You need a way to observe, maintain and restore the state of things in your scenes during the duration of the game.

The easiest way to do this is with a GameManager. This can be as simple or as complex as you like.

ULTRA-simple static solution to a GameManager:

I need to save the score when the scene resets

I see this question enough that I decided to answer it once and for all and you can tell me if I have done so successfully! Here is what I have created, two files: ULTRA-simple static solution to a GameManager: https://gist.github.com/kurtdekker/50faa0d78cd978375b2fe465d55b282b Each file has notes at the top of it telling you how to use it. Can you please look it over and see if it makes sense? You will need to call GM.InitGame() at the start of every game, and call GM.AddScore() to add poin…

https://gist.github.com/kurtdekker/50faa0d78cd978375b2fe465d55b282b

OR for a more-complex “lives as a MonoBehaviour” solution…

Simple Singleton (UnitySingleton):

Some super-simple Singleton examples to take and modify:

Simple Unity3D Singleton (no predefined data):

https://gist.github.com/kurtdekker/775bb97614047072f7004d6fb9ccce30

Unity3D Singleton with a Prefab (or a ScriptableObject) used for predefined data:

https://gist.github.com/kurtdekker/2f07be6f6a844cf82110fc42a774a625

These are pure-code solutions, do not put anything into any scene, just access it via .Instance!

If it is a GameManager, when the game is over, make a function in that singleton that Destroys itself so the next time you access it you get a fresh one, something like:

public void DestroyThyself()
{
   Destroy(gameObject);
   Instance = null;    // because destroy doesn't happen until end of frame
}