Loading from slot doesn't seem to work if I call open level from GameplayStatics

Development Programming & Scripting C++
1

I’m trying to implement a feature in my save mechanic where the player can open a loading menu from any level in my game and load their last save file. The problem I seem to be having though is that when I call UGameplayStatics::OpenLevel(GetWorld(), LoadGame->LevelName), opening the level will destroy my character class when I leave the current level and then construct it when I enter the new level. This in turn is resetting all my character values to their defaults or whatever the editor defaults are. Does anyone have any advise as to how I can maintain my loaded slot data between levels?
Here is my saving and loading functions. The properties in my MeatSaveGame class all have the UPROPERTY(VisibleAnywhere, Category = Basic)


void AMeatCharacter::SaveGame()
{
    UMeatSaveGame* SaveGame = Cast<UMeatSaveGame>(UGameplayStatics::CreateSaveGameObject(UMeatSaveGame::StaticClass()));
    if(SaveGame)
    {
        SaveGame->PlayerStats.MaxHealth = PlayerStats.MaxHealth;
        SaveGame->PlayerStats.Health = PlayerStats.Health;
        SaveGame->PlayerStats.MaxStamina = PlayerStats.MaxStamina;
        SaveGame->PlayerStats.Stamina = PlayerStats.Stamina;

        SaveGame->Rotation = GetActorRotation();
        SaveGame->Location = GetActorLocation();

        FString LevelName = GetWorld()->GetMapName();
        LevelName.RemoveFromStart(GetWorld()->StreamingLevelsPrefix);
        SaveGame->LevelName = LevelName;
        UGameplayStatics::SaveGameToSlot(SaveGame, SaveGame->SlotName, 0);
    }
}

void AMeatCharacter::LoadGame()
{
    // This is fine for now however, this is going to be problematic when the need for saving levels will be necessary
    UMeatSaveGame* LoadGame = Cast<UMeatSaveGame>(UGameplayStatics::CreateSaveGameObject(UMeatSaveGame::StaticClass()));
    LoadGame = Cast<UMeatSaveGame>(UGameplayStatics::LoadGameFromSlot(LoadGame->SlotName, LoadGame->SlotIndex));

    if (LoadGame)
    {
        UGameplayStatics::OpenLevel(GetWorld(), *LoadGame->LevelName);
        if(PlayerController)
        {
            FInputModeGameOnly Input;
            PlayerController->SetInputMode(Input);
        }
        PlayerStats = LoadGame->PlayerStats;
        // If I debug from here I can see that LoadGame does get the rotation from the save game fucntion
        SetActorRotation(LoadGame->Rotation);
        SetActorLocation(LoadGame->Location);
    }
}
2

I posted a similar question in the answer hub as well.

3

I tried using a game instance but I’m having the same problem where after I call open level anything set in my load game function is destroyed as open level reconstructs my character and deletes the data.
Surely someone knows. Thanks for any help

4

It’s working as it should.
You have to execute load game after the level is loaded, not before.

5

Yeah, sorry, that’s what I’m trying to ask. I want to be able to do it from a pause menu, where the character could be in any level. Or, be able to do it from the game start menu, which is it’s own level as well.

6

Okay so I did some blue print scripting with game instance, game save, and level blueprint classes. At the very basic level I set a Boolean variable when I “load” a game. After loading the level I check the game instance to see if that value is true. If so, that means it begin play was triggered by my load event. Then, I call a different load function from my character controller that loads the slot again. This time, getting the save location and rotation. And finally, I get the player character and set the rotation and location.

Now, this solution means that I am calling LoadFromSlot twice in order to load the game. Does anyone know if there is a more elegant and or optimal way to do this. I can provide any pictures if clarification is needed.

7

You can create a tiny “meta” slot file that contains only the name of level saved then load that and call OpenLevel function.

Engine have a C++ event that executes every time a level is loaded, you can subscribe to that event to load the actual “fat” slot file once you have opened target level from first meta slot.

8

That would mean creating two save game objects when i save and saving them both to the slot, I assume. I’ll give it a shot. I also came across Rama’s tutorial about ALevelScriptActor. I may try and use that class to create a function for all of my levels to check the game instance for bool I described in my last post.
Thanks for the help.