Am I hallucinating?

[Tej_Patel]

Hi guys,

Before reading on, note that I also completed the Displaying Experience lecture before writing this post.

I’m noticing some weird behavior with the saving system and experience points. If I kill an enemy and manually save by pressing S, then it saves the experience.
I can tell because when I press L to load, it still shows 10 XP, which is what I got from killing the enemy. No error messages, nothing at all. Everything’s fine when I do this.

However, now, when I enter a different scene, the XP resets to 0. In addition, I get a bunch of red warnings when I switch scenes:

Following the errors, I looked at my experience display script in update. Here is the ExperienceDisplay script:

using System;
using UnityEngine;
using UnityEngine.UI;

namespace RPG.Attributes
{
    public class ExperienceDisplay : MonoBehaviour
    {
        Experience experience;
        Text xpText;

        private void Awake()
        {
            experience = GameObject.FindWithTag("Player").GetComponent<Experience>();
            xpText = gameObject.GetComponent<Text>();
        }

        private void Update()
        {

            xpText.text = string.Format("{0:0}", experience.GetPoints());
        }
    }
}

I noticed if I add if (experience == null) return; right before setting the text, the log messages go away, but the XP still doesn’t load properly. I’m not sure if it’s something to do with how I wrote the experience display script, or if I messed up something in the saving system or even switching between scenes.

For reference, here is Experience.cs:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using RPG.Saving;

namespace RPG.Attributes
{
    public class Experience : MonoBehaviour, ISaveable
    {
        [SerializeField] float experiencePoints = 0;

        public void GainExperience(float experience)
        {
            experiencePoints += experience;
        }

        public float GetPoints()
        {
            return experiencePoints;
        }

        public object CaptureState()
        {
            return experiencePoints;
        }

        public void RestoreState(object state)
        {
            experiencePoints = (float)state;
        }
    }
}

Thanks for your time and help!

[Brian_Trotter]

Does your player in the other scene have an Experience component? Is the player tagged “Player”? Is it the only thing in the scene tagged “Player”?

[Tej_Patel]

Thanks! Silly me, the player in the other scene didn’t have an experience component.