What would be an effective way of GameObject position and related properties?

Unity Engine
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1

I am building this cafe simulator kind of game. And when it comes to saving the current state of the scene(to server) ie the positions of each new object example :a new fridge a stove etc. What would be a good way of saving the properties of each of this new bought items and their positions.
FYI using firebase real-time db.
Any thoughts? Thanks in advance.

2

There’s like at least ten or twenty billion Youtube tutorials on loading / saving game state.

But if you want, here’s some more Load/Save steps:

Don’t use a binary serializer: it’s insecure and it makes debugging very difficult

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3

Thanks for the reply, I was planning on doing the iteration model. Wanted to know of there was an easier method or something.

One more thing of you don’t mind… I was thinking about coming up with a system to only update the changed values to the db each time I’m saving the updated scene. Is going through all that trouble to save a bit data worth the time? Considering all I will be updating are a few vector positions and few ints?

4

I certainly cannot answer this. If the quantities represented thousands of real dollars, then perhaps yes. If they represent in-game currency that the user can get for free, perhaps not. Your call.

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5

The way I’ve gone about saving the position/rotation/scale of an object is by creating a TransformValues struct that groups these values together, which can be saved/loaded to a file or database. Then I’ve created some Transform extension methods to convert between Transform and TransformValues:

[Serializable]
public struct TransformValues {
   [SerializeField] private Vector3 position;
   [SerializeField] private Vector3 rotation;
   [SerializeField] private Vector3 scale;

   public TransformValues(Vector3 position, Vector3 rotation, Vector3 scale) {
      this.position = position;
      this.rotation = rotation;
      this.scale = scale;
   }

   public TransformValues(Vector3 position, Quaternion rotation, Vector3 scale) {
      this.position = position;
      this.rotation = rotation.eulerAngles;
      this.scale = scale;
   }
  
   public TransformValues(Transform transform, bool localValues = false) {
      if(localValues) {
         this.position = transform.localPosition;
         this.rotation = transform.localEulerAngles;
      }
      else {
         this.position = transform.position;
         this.rotation = transform.eulerAngles;
      }

      this.scale = transform.localScale;
   }

   public void Apply(Transform transform) {
      transform.position = position;
      transform.rotation = Quaternion.Euler(rotation);
      transform.localScale = scale;
   }

   public void ApplyLocal(Transform transform) {
      transform.localPosition = position;
      transform.localRotation = Quaternion.Euler(rotation);
      transform.localScale = scale;
   }

   public Vector3 Position => position;
   public Vector3 Rotation => rotation;
   public Vector3 Scale => scale;
}

public static class TransformExtensions {
   public static TransformValues ToValues(this Transform transform) => new TransformValues(transform);

   public static TransformValues ToLocalValues(this Transform transform) => new TransformValues(transform, true);

   public static void FromValues(this Transform transform, TransformValues values) => values.Apply(transform);

   public static void FromLocalValues(this Transform transform, TransformValues values) => values.ApplyLocal(transform);
}

Then saving/loading a GameObject’s position/rotation/scale would be done like so:

public class SomeClass : MonoBehaviour {
   //Save the position/rotation/scale of this object and send it to a database or wherever.
   public TransformValues SaveState() => this.transform.ToValues();

   //Re-apply the saved values pulled from the database or wherever.
   public void LoadState(TransformValues state) => state.Apply(this.transform);
}
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6

Wow thanks mate. This is really helpful.