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Question by Frobegames · Oct 14, 2020 at 12:48 PM · c#timerscene-switchingobject movement

Teleporting a Object to Another Scene and Back

I'm Very new to unity and I'm making a game about tending to a campfire. If it stays out longer than 15-30 seconds it's game over. but if you relight the fire you stay alive. rather than destroy the fire object and respawn it. I wish to teleport the fire object to a separate scene than teleport it back if it's relit in time. does anyone know the code for this? Here is my code for the campfire.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine.SceneManagement;
 using UnityEngine;
 
 public class Extinguish : MonoBehaviour
 {    
     public float timeLeft = 30;
     
      // Start is called before the first frame update
      void Start()
      {
          
      }
      // Update is called once per frame
      void Update()
      {
          timeLeft -= Time.deltaTime;
          if (timeLeft <= 0.0f)                   
          {
              Debug.Log("Fire Out");
          }
          if (timeLeft <= -15f)
          {
            Debug.Log("GameOver");          
              SceneManager.LoadScene("GameOver");
          }
      }   
 }

And here is my code for the campfire teleporting.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine.SceneManagement;
 using UnityEngine;
 
 public class Gameovertimer : MonoBehaviour
 {
     public Extinguish public string m_Scene;
     public GameObject m_CampFire;
     
      // Start is called before the first frame update
      void Start()
      {
        
      }
      // Update is called once per frame
      void Update()
      {
          if (timeLeft <= -1f)
          {
              StartCoroutine(LoadYourAsyncScene());
          }
      }
      IEnumerator LoadYourAsyncScene()
      {
          Scene currentScene = SceneManager.GetActiveScene();
          AsyncOperation asyncLoad = SceneManager.LoadSceneAsync(m_Scene, LoadSceneMode.Additive);
          {
              while (!asyncLoad.isDone)
              {
                  yield return null;
              }
          }
      }
 }
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Answer by rh_galaxy · Oct 14, 2020 at 03:02 PM

I don't think scenes are meant to be used like that. Instead of teleporting the fire away you can do

 m_CampFire.SetActive(false);

Also timeLeft is declared in Extinguish, and cannot be used in Gameovertimer... you can have both of those objects/scripts in the same scene, or combine them in one script not needing any scenechange. Maybe there are things you want to do with the scenechange that I don't know about, but it takes time to load a scene and the game will appear frozen for a couple of frames at least even when using LoadSceneAsync().

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Answer by Magso · Oct 14, 2020 at 03:02 PM

You don't have to teleport it between scenes, unless it's absolutely necessary in which case you can use transform.SetParent() however Unity advise against doing this 'Cross-Scene references are not supported, and are prevented in Edit mode. In Play mode they are allowed, because Scenes cannot be saved.'

In your case you can use gameObject.SetActive().

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