Problem with instantiating Projectile

Hello all,
I got a problem which I cannot seem to solve and I don't know why. In my script I try instantiate an arrow as follows:

PHP:

Vector3 arrowLookPos = target.position-transform.position;
        Quaternion arrowLookRotation = Quaternion.LookRotation(arrowLookPos);        
        Rigidbody clone = (Rigidbody) Instantiate(arrow, transform.position, arrowLookRotation);
        clone.velocity = clone.transform.forward * 30;
        Physics.IgnoreCollision(clone.collider, transform.root.collider);


This code works correctly as long as I make a "public Rigidbody arrow" and Drag&Drop my Prefab (with the name "Arrow") into the specific slot. However if I try to instantiate using "Resources.Load("Arrow") I get an Exception like "Object Reference is not set to an instance of an object". This is the code I used:

PHP:

GameObject arrow = (GameObject) Resources.Load("Arrow");
        
        Rigidbody clone = Instantiate(arrow, transform.position, arrowLookRotation) as Rigidbody;
        clone.velocity = clone.transform.forward * 30;


The compiler shows me the error in the last line (the one with clone.velocity). Therefore my question is: how can I instantiate rigidbody projectiles correctly?

 

Since ive never used resources.load, this is a bit of a guess, but if its not in the correct path, it wont load.

Assets/Resources/[prefab name]

 

Thanks for the answer, but I got the path right. I have it in the "Resources" folder. Also I have another prefab in this folder which I instantiate (a plain gameobject, not a rigidbody) which loads correctly everytime without error. I really don't get where the error is with this rigidbody projectile...

 

why dont you just instantiate the gameobject then access the rigidbody?


GameObject instance = Instantiate(Resources.Load("enemy", typeof(GameObject)));
instance.rigidBody.velocity....

 

Similar to what jlcnz is saying...

If I understand correctly you should be instantiating a gameObject and modifying the gameObject's transform. I thought Rigidbody is simply a component that needs to have a gameObject as a parent? A rigidbody by itself doesn't technically have a transform component, hence the null reference exception.

This is just my first thought, I could be totally wrong.

 

Thanks again for this hint, I have already tried that, and it works on the first view - until I saw that:
Every instance spawns at first for a very short time on (0,0,0) in the scene and only afterwards you can set the correct location. So if you spawn multiple instances you see lots of flickering disappering/appearing arrows in the scenery before the arrows are actually set to their specific location :-|

Unfortunately there is no function which allows me to do that: Rigidbody = Instantiate(Resources.Load("enemy", typeof(GameObject),position,rotation). I mean, do I really need to uplift the whole scenery to have (0,0,0) out of sight? There should be another clean solution, ain't it? :-(

 

Code (csharp):

1.  
2. GameObject projectile = Instantiate(Resources.Load("arrow", typeof(GameObject)), location, rotation);
3.  
4. projectile.rigidBody....
5.  
6.  

if if doesnt like that, try
GameObject projectile = Instantiate((GameObject)Resources.Load("arrow", typeof(GameObject)), location, rotation);

 

THANKS a million! This was it! It works!

(I always tried to instantiate it with "Rigidbody clone = ...Instantiate/Resources.Load etc." or to cast the GameObject to a "Rigidbody" which resulted in errors. Obviously I have understood this variable "Rigidbody" wrong. I only need to instantiate the GameObject and then access its rigidbody component).