error CS0103 rb doesn't exist in the current context, ligne 8 and 15 , can't fix it

Questions & Answers
1

using UnityEngine;
using System.Collections;
public class PlayerController : MonoBehaviour {
public float speed;
private Rigidbody rb;
void Start ()
{
rb = GetComponent();
}
void FixedUpdate ()
{
float moveHorizontal = Input.GetAxis (“Horizontal”);
float moveVertical = Input.GetAxis (“Vertical”);
Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);
rb.AddForce (movement * speed);
}
}

2

Assign it in Awake instead. You can also add a RequireComponent Attribute to make sure it always has a RigidBody component.

 using UnityEngine;
 using System.Collections;
[RequireComponent (typeof(Rigidbody))]
 public class PlayerController : MonoBehaviour
{
 public float speed;
 private Rigidbody rb;
 void Awake ()
     {
         rb = GetComponent<Rigidbody>();
     }
 void FixedUpdate ()
     {
         float moveHorizontal = Input.GetAxis ("Horizontal");
         float moveVertical = Input.GetAxis ("Vertical");
 Vector3 movement = new Vector3 (moveHorizontal, 0.0f, moveVertical);
 rb.AddForce (movement * speed);
     }
 }