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Question by nishantcoolvns · Feb 22, 2016 at 02:26 PM · null reference exception

null reference Exception object reference not set i did not understand the prob. please help me

public class PlayerMovment : MonoBehaviour {

 private Rigidbody rb;

 void start()
 {
     //accesing comppnent
     rb = GetComponent<Rigidbody>();
 }
 
 void FixedUpdate()
 {
     ///getting input from the player
     float moveHorizontal = Input.GetAxis("Horizontal");
     float moveVertical = Input.GetAxis("Vertical");

     //calculating the values
     Vector3 movement = new Vector3(moveHorizontal, 0.0f, moveVertical);
     
     //adding the input to the player
     rb.AddForce(movement);
 }

}

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Answer by jgodfrey · Feb 22, 2016 at 03:13 PM

I assume the problem is in this line?

 rb.AddForce(movement)

If that's the case, then your "rb" variable doesn't contain a valid reference to a Rigidbody. Are you sure the gameobject this script is attached to has a Rigidbody component?

Ah, wait... I bet the problem is with your "start" method. That should be "Start" (note the capital "S").

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