Object after instantiate doesn't apply AddForce

Question

Hello, I was instantiating a prefab by UnityOfficial tutorial for Instantiate. All work except "AddForce" command. I wrote script as in the tutorial, but variable ballPrefab I made as GameObject type instead of Rigidbody. If it is Rigidbody, I can not add prefab in the inspector into it... Here is the code:

 public Transform spawner;
 public GameObject ballPrefab;
 
 void Update () {
         
         if (Input.GetButtonDown("Fire1")) {
 
            Rigidbody ballInstance;
            ballInstance = Instantiate(ballPrefab, spawner.transform.position, spawner.rotation) as Rigidbody;
 
            ballInstance.AddForce(spawner.forward * 3000);
         }
 }

Answer 1

Best Answer

Answer by robertbu · Oct 19, 2013 at 09:19 PM

Try it this way:

 public Transform spawner;
 public GameObject ballPrefab;
  
 void Update () {
  
         if (Input.GetButtonDown("Fire1")) {
  
            GameObject ballInstance;
            ballInstance = Instantiate(ballPrefab, spawner.transform.position, spawner.rotation) as GameObject;
  
            ballInstance.rigidbody.AddForce(spawner.forward * 3000);
         }
 }

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xerotechnologiesnetllc · Aug 26, 2014 at 02:03 AM 0

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Thank you so much for this. The documentation from Unity is not very well worded for AddForce.

robertbu · Aug 26, 2014 at 02:06 AM 0

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The problem was not the AddForce(). The issue is that 'ballPrefab' is a GameObject, but you cast it to a Rigidbody. It will work when both the 'ballPrefab' and the 'ballInstance' are the same type...either Rigidbody or GameObject.

avi_spc · Jun 28, 2017 at 07:44 PM 0

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I have already used Rigidbody2D for my 2D game but then also force is not being applied. Can you give me a solution?

Jwizard93 avi_spc · Jun 28, 2017 at 10:02 PM 0

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How could we know what you are trying to do with this amount of information?

Object after instantiate doesn't apply AddForce

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