2D movement stutter

Hi,

i have got some performance-trouble while doing a simple task: Moving a single Sprite / Rigidbody2d over the screen. I simply took two sprites (one for the background and one for the moving object), placed them on the Scene and wrote a script to move one of the objects. The Code i used is like this:

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class move : MonoBehaviour {
5.  
6.     Rigidbody2D car;
7.     public Vector2 speed = new Vector2(10, 0);
8.  
9.     // Use this for initialization
10.     void Start () {
11.         car = this.rigidbody2D;
12.     }
13.  
14.     // Update is called once per frame
15.     void FixedUpdate () {
16.         car.MovePosition(car.position + speed * Time.deltaTime);
17.     }
18. }

The Sprite is stuttering - but why? I made you a video to clarify what i am talking about / attached the project. I would be realy thankful if somebody could check what's going wrong about my project. Thank you.

Video: http://www.file-upload.net/download-9031974/Unity-2014-06-09-15-53-09-51.rar.html Project: Attached

Regards
Teyhouse

 

Try LateUpdate() instead of FixedUpdate().

 

Nope - that doesnt help. So guys before i get crazy to make sure i do not make something wrong: Please can somebody try it himself with the latest Unity-Version 4.5.0f6? Just make a new 2D project - place a sprite and let it move (only +x) from one site of the Camera to the other-site and look if you also got the stuttering-effect... if your version works pleace show it to me. This problem is getting kind of frustrating.

 

Not sure if this helps (I'm pretty new to Unity) but this is what I got with your code. The part in the middle is with your code, where the car moves slowly and is noticeably jerky.

I changed it to give the rigidbody2d some velocity and it seemed to work okay (the bits at the beginning and end), though the video makes it look a little less smooth than it does on my screen. Below, if it helps, is the code I used. The game I'm current working on uses rigidbodies all the time and I've never had a problem like this but I've also never moved them by position (I didn't even know the method existed until now). As far as I know, reading around the forums, I understood it was better to allow the rigidbodies to work out their places using their physics. I wonder if that's the problem here.

Code (CSharp):

1.      
2.         Rigidbody2D car;
3.         public Vector2 speed = new Vector2(10f, 0f);
4.      
5.         // Use this for initialization
6.         void Start () {
7.         car = gameObject.GetComponent<Rigidbody2D>();
8.         car.velocity = speed;
9.  
10.     }
11.      
12.         // Update is called once per frame
13.         void LateUpdate () {
14.  
15.         car.velocity = new Vector2(speed.x, car.velocity.y);
16.  
17.      
18.     //        car.MovePosition(car.position + speed * Time.deltaTime);
19.         }
20.     }

 

Nope, unfortunately that's not better

 

Could it be an fps issue ? You can try printing the fps and if its
hovering around some value like 30, then its probably getting
locked there. In that case, you can increase it with
Application.targetFrameRate