Error CS0120: Object reference is required to access non-static member...

Hi guys. I'm following a youtube tutorial and I tried using his script to move an object, but I get an error saying:

Assets/movement.cs(18,27): error CS0120: An object reference is required to access non-static member `UnityEngine.Rigidbody.AddForce(UnityEngine.Vector3, UnityEngine.ForceMode)'

Here is the script

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class movement : MonoBehaviour {
5.     public float moveSpeed;
6.     private float maxSpeed = 5f;
7.  
8.     private Vector3 input;
9.  
10.     // Use this for initialization
11.     void Start () {
12.    
13.     }
14.    
15.     // Update is called once per frame
16.     void Update () {
17.         input = new Vector3(Input.GetAxis ("Horizontal"), 0, Input.GetAxis ("Vertical"));
18.         Rigidbody.AddForce(input);
19.    
20.     }
21. }
22.  

Help?

 

This should help you:
http://docs.unity3d.com/ScriptReference/Rigidbody.AddForce.html

You can only call AddForce() on a concrete rigidbody object.

For example declare a public variable on top of the script

Code (csharp):

1.  public Rigidbody rb;

and in the Update method call:

Code (csharp):

1.  rb.AddForce(input);

 

pre unity 5 you could use

Code (csharp):

1.  
2. rigidbody
3.  

as a shortcut accessor to the Rigidbody on the gameobject
with unity 5 they removed the majority of these short cut accessors.

note the use of lowercase and uppercase here, uppercase is the class, lowercase is the variable


if you try

Code (csharp):

1.  
2. Rigidbody.someFunction();
3.  

you are trying to call a static class level function.

if you try

Code (csharp):

1.  
2. rigidbody.someFunction();
3.  

you are calling a function on the specific instance referred to by the variable "rigidbody" (which you need to declare and initilise manually since 5)

 

As was said above me, you need to store the rigidbody that is attached to the object in a variable.

Code (CSharp):

1. public class Movement : MonoBehaviour {
2.     private Rigidbody _rigidbody;
3.  
4.     void Start() {
5.         this._rigidbody = GetComponent<Rigidbody>();
6.     }
7.  
8.     void Update() {
9.         //Do whatever you'd like with the rigidbody
10.         this._rigidbody.AddForce(new Vector3(2.0f, 0.0f, 0.0f));
11.     }
12. }

 

Yea, the rigidbody component wasn't added to the object, and apparently I used the old notation that didn't apply for Unity 5. Thank you!