Problem to add an item in an array

Development Programming & Scripting
1

Hello UnrealEngineers (waw!)

I think, I’ve missed something on jow to add an item in an array (even if I’ve read the unrealengine.com doc).

To stay as simple as possible, in my project I have a level wich is a 3D hub were the player can select in wich level he want to go with his character. Once the level selected, he has to go through a ‘portal’ (a very simple Blueprint with an -OpenLevel- node).
But I want to set an array wich will include all the unlocked levels to not allowed the player to go to a level that he has not unlocked previously. To unlock a Level the player has to collect 3 coins in the first level to unlock the 2nd level…
So here is how I made it:

-Each time the player pick up a coin, here is game happen in GameState:

229386-capture-1.png
229386-capture-1.png1148×254 71.8 KB

(By default Unlocked Level contains 1 item)

-Here is how the portal check if the Selected Level is Unlock:

229387-capture-2.png
229387-capture-2.png1155×304 78 KB

229388-capture-3.png
229388-capture-3.png1171×319 80.3 KB

It seems that Level_2 is added when the CoinTest event is called but when an other level is load the array is ‘reset’ to his default value (at least it is what I think after many debugging tries).

Thanks for reading!

PS: Every similarity with the ‘Blueprint Game Framework Basics | Live Training | Unreal Engine’ tutorial video by Alan Noon is purely intentional.

2

When you open another level, your variables will be reset. You should use save game or game instance to transfer variables between levels

3

i would create an array in the game instance so the values it contains are non volatile (persist between levels). for the variable type of the array i would use a struct, this way you can have associated values. for example you could have a struct that contains the level name and a bool for if the level is unlocked.