Movement in the current update

Hey, I've been looking through tutorials but they all seem to be out of date in terms of 3d character movement. So I've been looking for the specific word to make my character move, but I can't find it. Got any vocab I could use?

 

What?

 

uh..... i dont really use 3d, but transform.translate, Vector3, and addforce might help

 

Well I started with Unity back in Unity 4, and movement worked the same back then as it does now, so you must be using some really old tutorials. Take a look at the Learn section for something more recent, or find some YouTube tutorials which were posted in the last few years.

 

Aight hold up. How would you use addforce? Like would you go "rb.AddForce()" or something else because doing that in the quotes doesn't seem to match up with the compiler.

 

rb.AddForce is how you do it. However, it does not take in a single value, and cannot just be called as is.
What I mean is it has to be used like
float thrust = 100;
rb.AddForce(transform.forward * thrust);

 

are you using vs 2017 or 2019

 

It just that there something I'm missing in this.

 

This is the code you currently have:

Code (CSharp):

1. using UnityEngine;
2.  
3. public class Movement : MonoBehaviour
4. {
5.     public float gasForce = 500f;
6.     public float rearForce = 50f;
7.     public float steeringForce = 250f;
8.     // Start is called before the first frame update
9.     void Start()
10.     {
11.      
12.     }
13.  
14.     // Update is called once per frame
15.     void FixedUpdate()
16.     {
17.         if(Input.GetKey("w"))
18.         {
19.             rb.AddForce(0, gasForce * Time.deltaTime, 0);    
20.         }
21.         if(Input.GetKey("s"))
22.         {
23.             rb.AddForce(0, -rearForce * Time.deltaTime, 0);
24.         }
25.         if(Input.GetKey("a"))
26.         {
27.             rb.AddForce(steeringForce * Time.deltaTime, 0, 0);
28.         }
29.         if(Input.GetKey("d"))
30.         {
31.             rb.AddForce(-steeringForce * Time.deltaTime, 0, 0);
32.         }
33.     }
34. }

In the future please post your code like this.

What you are missing here is a definition for what rb is.
Assuming you have a RigidBody on your GameObject, you can get a reference to that RigidBody using the GetComponent method that MonoBehaviour provides you.

To save performance, because we want all of those sweet fps, you would normally only ask for a component once and remember the result. That is most often done in the Start() method.

Code (CSharp):

1. using UnityEngine;
2.  
3. public class Movement : MonoBehaviour
4. {
5.     public float gasForce = 500f;
6.     public float rearForce = 50f;
7.     public float steeringForce = 250f;
8.     // Make it private, so it can't be messed with in the Inspector.
9.     private RigidBody rb;
10.     // Start is called before the first frame update
11.     void Start()
12.     {
13.          // Note that this will fail horribly if you don't have a RigidBody component on you GameObject
14.          rb = GetComponent<RigidBody>();
15.     }
16.  
17.     // Update is called once per frame
18.     void FixedUpdate()
19.     {
20.         if(Input.GetKey("w"))
21.         {
22.             rb.AddForce(0, gasForce * Time.deltaTime, 0);      
23.         }
24.         if(Input.GetKey("s"))
25.         {
26.             rb.AddForce(0, -rearForce * Time.deltaTime, 0);
27.         }
28.         if(Input.GetKey("a"))
29.         {
30.             rb.AddForce(steeringForce * Time.deltaTime, 0, 0);
31.         }
32.         if(Input.GetKey("d"))
33.         {
34.             rb.AddForce(-steeringForce * Time.deltaTime, 0, 0);
35.         }
36.     }
37. }

If you want to make sure that Unity tells you if you are missing that RigidBody on your GameObject, you can use RequireComponent. I actually highly recommend to do that, because you can be sure that you (also I and everyone else here) will make every stupid mistake thats possible

 

Thanks you so very much! That's quite reassuring.