Save Bool Data

[Mike_Schoenhals1]

Hi,

In lecture 85 of the new RPG course, Sam’s states that the save system can be used to save a bool; however, he doesn’t discuss how. If I try to just to enter a bool into the Capture Method, it returns an error. In my game, I have a bool called miniFigMojo that I would like saved and recalled. How would I go about including this in the saved game data?

Here’s the current save game code:

        public object CaptureState()
        {
            return energyPoints.value;
            //return miniFigMojo;
        }

        public void RestoreState(object state)
        {
            energyPoints.value = (float)state;
        }

Thanks.

[Marc_Carlyon]

You might want to peruse the next section in the course which goes into the creation of the saving system and it may make a bit more sense on how to achieve this.

[Mike_Schoenhals1]

I’ve completed that section. All of Sam’s examples involve saving float/int data. Does anyone have an example of saving Bools?

[David_Lamonaca]

I’m not sure if you can save a bool, but if you already know how to save a float/int why not just do that.

Have an int/float called isPlayerDead for example and have 0 = false and 1 = true, or something like that.

[Marc_Carlyon]

@sampattuzzi I saw a discussion on this in the Q&A but now cannot find it.
Any insights on this?

[Mike_Schoenhals1]

Yes, you can save a bool. Here’s an example how:

    public object CaptureState()
    {
        return isEmpty;
    }

    public void RestoreState(object state)
    {
        isEmpty = (bool)state;

        if (isEmpty == true)
        {
            gameObject.SetActive(false);
        }
    }

So, isEmpty is the bool variable for a item chest. The restore checks if the chest is empty and, if so, disables it.

[sampattuzzi]

Yes, saving bools should be pretty easy. I notice that in your original example you were casting to float. Was that the issue you had?

[Mike_Schoenhals1]

Hi Sam,
Thank you for your response. It turns out my real problem was that I wanted to capture more than one type of data (a bool and a float). I found and watched the bonus lecture on the topic (I missed it on my first go through the course) but I wasn’t able to replicate it (I tried both methods mentioned in the lecture). If you have any suggestions on how I might be able to do that, I’d greatly appreciate it.

[Seth_Durham]

Hi, Mike. Here’s an example of how i used the save system to capture multiple data types. I’ll paste the code, and explain what’s going on as best I can:

    //first, create a serializable class that will be used to capture multiple values.
    //this class is contained within the class that has the variables I want to save.
    //for this example, I want to save the variables: XPTowardsNextPoint, CurrentPoints, and IsAlive.

    //this class lives inside CharXP class (a MonoBehaviour that implements ISaveable)
    [System.Serializable]
    class MySaveData
    {
        //create variables for each field I want to save
        public int XP_TowardsNextPoint;
        public int currentNumOfPoints;
        public bool charIsAlive;
    }

    //CaptureState() is part of the save system Sam built (see ISaveable)
    public object CaptureState()
    {
        //create an instance of the MySaveData class
        var saveData = new MySaveData();

        //we're going to record the current values of the variables in this CharXP instance 
        saveData.XP_TowardsNextPoint = XPTowardsNextPoint;
        saveData.currentNumOfPoints = CurrentPoints;
        saveData.charIsAlive = IsAlive;

        //the object we return here is of type MySaveData and has the values we want saved
        return saveData;
    }

    //RestoreState() is part of the save system Sam built (see ISaveable)
    public void RestoreState(object state)
    {
        //create a variable of type MySaveData called saveData; cast the parameter, "state",
        //as a MySaveData and assign it to saveData.
        var saveData = (MySaveData)state;

        //set the values of this instance of CharXP == the values that we saved.
        CurrentPoints = saveData.currentNumOfPoints;
        XPTowardsNextPoint = saveData.XP_TowardsNextPoint;
        IsAlive = saveData.charIsAlive;
        //Note: the details of how the data is written to / read from a file on your computer
        // when CaptureState() / RestoreState() are called is part of the save system itself,
        //but this should give you a good idea of how to use it to do what you are trying to do.
    }