Can't find and instancied rigidbody

Hi guys, i'm trying to make an instancied rigidbody to move forward, however my code always return:
NullReferenceException: Object reference not set to an instance of an object
shoot.createProjectile () (at Assets/shoot.cs:55)
shoot.Update () (at Assets/shoot.cs:25)

Which means that it doesn't exist, but i created it ^^
Here's my code:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class shoot : MonoBehaviour {
5.  
6.     public GameObject projectile;
7.     public CharacterController player;
8.     public float projectileSpeed;
9.  
10.     private Vector3 position;
11.  
12.  
13.     // Use this for initialization
14.     void Start ()
15.     {
16.        
17.     }
18.    
19.     // Update is called once per frame
20.     void Update ()
21.     {
22.         if (Input.GetMouseButton(1))
23.         {
24.             locatePosition();
25.             createProjectile();
26.             isHit();
27.         }
28.  
29.  
30.     }
31.  
32.     void locatePosition() //Get the click
33.     {
34.  
35.         RaycastHit hit;
36.         Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
37.  
38.         if (Physics.Raycast(ray, out hit, 1000))//check if in camera
39.         {
40.             position = new Vector3(hit.point.x, hit.point.y, hit.point.z);
41.             Debug.Log(position); //Put in console position
42.         }
43.     }
44.  
45.     void createProjectile()
46.     {
47.         //rotate the player
48.         Quaternion newRotation = Quaternion.LookRotation(position - transform.position);
49.         newRotation.x = 0f;
50.         newRotation.z = 0f;
51.         transform.rotation = Quaternion.Slerp(transform.rotation, newRotation, Time.deltaTime * 10);
52.  
53.         Rigidbody instanceBullet;
54.         instanceBullet = Instantiate(projectile, transform.position, newRotation) as Rigidbody;
55.         instanceBullet.AddForce(transform.forward * 500, ForceMode.Force);
56.     }
57.     void isHit()
58.     {
59.  
60.     }
61. }

Thanks for the help!

 

Hmm do you have a gameobject dragged to the projectile variable in the inspector (a gameobject with a rigidbody component)?

 

Yes i do, the model spawn when i right click but dont move :/

 

THinking about it again, maybe not, it's a blend file i imported in unity, any idea how can i attach a rigidbody to it ?

EDIT: K i managed to attached a rigidbody to it (via a prefab) but its still don't move and i have the same error :s any idea ?

EDIT2: Still working on it i changed this code:

Code (CSharp):

1.  
2. Rigidbody instanceBullet = Instantiate(projectile, transform.position, newRotation) as Rigidbody;
3.         instanceBullet.velocity = position;

And i got this error on the velocity: NullReferenceException: Object reference not set to an instance of an object which means the rigidbody/instanciate object is null ? however it still spawn in my game :s

Thanks for your answers

 

I have no idea if i'm right but this you might want to change the code to instantiate projectile as a GameObject, and then find the Rigidbody through GetComponent() Because you are currently instantiating GAMEOBJECT projectile as Rigidbody.

Maybe something like:

Code (CSharp):

1. public GameObject projectile;

Code (CSharp):

1. GameObject instanceBullet = Instantiate(projectile, transform.position, newRotation) as GameObject;
2.  
3. rigidBody instanceBulletBody = instanceBullet.getComponent<"RigidBody">;
4.  
5. //Do stuff with the rigidbody here

It's just psuedo code, so don't expect it to work if you copy and past it, I just quickly typed what I was thinking, didn't think about capital letters or anything.

I hope I helped

 

Your initial code looked okay i think: http://docs.unity3d.com/ScriptReference/Object.Instantiate.html
Try adding the model you want to instantiate to the hierarchy and add a rigidbody to it. Then drag the gameobject to a folder in the project explorer to make a prefab. Then add that prefab to the projectile variable in the inspector. If that does not work then???

If it does not work try to look through this video to see where it goes wrong in the workflow - it is mostly the same thing you are looking for i thin? http://unity3d.com/learn/tutorials/modules/beginner/physics/assignments/brick-shooter

 

Thanks for the help i'll try wgen i get home

 

@LukeWaffel Thanks for the answer i got it! here's my final code

Code (CSharp):

1. GameObject instanceBullet = Instantiate(projectile, transform.position, newRotation) as GameObject;
2.         Rigidbody instanceBulletBody;
3.         instanceBulletBody = instanceBullet.GetComponent<Rigidbody>();
4.         instanceBulletBody.AddForce(transform.forward, ForceMode.Force);

Thank for the answers!

 

Ahh no problem @ExoAve , I'm glad I could help!

 

It's important to note the difference between "as X" and casting to X. When you do this:

Code (CSharp):

1. Rigidbody instanceBullet = Instantiate(projectile, transform.position, newRotation) as Rigidbody;

and what you're instantiating can't be cast to Rigidbody, the code will silently return null. Had you instead done this:

Code (CSharp):

1. Rigidbody instanceBullet = (Rigidbody) Instantiate(projectile, transform.position, newRotation);

you would have gotten an exception telling you that the cast was impossible. I'd recommend staying away from using "as", unless the code is supposed to not crash if the cast isn't possible.