Jittering movement in my 3D snake game

Hey everyone,

I am experiencing jittery movement in my 3D snake clone.

This is the code:

Code (CSharp):

1.  
2. //movement
3.     private Rigidbody rb;
4.     public float force;
5.     public float turnspeed;
6.  
7.     //spawning
8.     public int spawndelay;
9.     public GameObject segment;
10.     private List<Vector3> lastpos = new List<Vector3>();
11.     private List<Quaternion> lastrotation = new List<Quaternion>();
12.     private List<GameObject> segments = new List<GameObject>();
13.  
14.  
15.  
16.  
17.     private int i = 1;
18.  
19.     private void Start()
20.     {
21.         rb = GetComponent<Rigidbody>();
22.         StartCoroutine(spawnseg());
23.     }
24.  
25.     private void Update()
26.     {
27.         lastpos.Insert(0, transform.position);
28.         lastrotation.Insert(0, transform.rotation);
29.  
30.         Move();
31.  
32.         UpdateSegments();
33.  
34.     }
35.  
36.     //removed move function(uses rb.addforce and rb.addrelativetorque
37.  
38.     private void FixedUpdate()
39.     {
40.         rb.velocity = (force * transform.forward * Time.deltaTime);
41.     }
42.  
43.     public void addnewSegment()
44.     {
45.         GameObject newsegment = Instantiate(segment, lastpos[spawndelay * i], lastrotation[spawndelay * i]);
46.         segments.Add(newsegment);
47.         newsegment.GetComponent<SegmentScript>().spawnint = spawndelay * i;
48.         i++;
49.  
50.     }
51.  
52.     void UpdateSegments()
53.     {
54.  
55.         foreach(GameObject intsegment in segments)
56.         {
57.             intsegment.transform.position = lastpos[intsegment.GetComponent<SegmentScript>().spawnint];
58.             intsegment.transform.rotation = lastrotation[intsegment.GetComponent<SegmentScript>().spawnint];
59.         }
60.     }
61.  
62.     private IEnumerator spawnseg()
63.     {
64.         yield return new WaitForSeconds(3f);
65.         addnewSegment();
66.         StartCoroutine(spawnseg());
67.     }

Basiclly i save all the last positions in a list, then have the objects just move to the next spot in the list.
However the segments seem to be jittering around in their place even when going straight.

Thanks

 

There's a lot going on here, let's fix a few things one by one and see what happens.

First off, I notice you're incorporating Time.deltaTime in your FixedUpdate() method. This could certainly be contributing to the jitteriness as FixedUpdate already runs at a simulated fixed interval. Time.deltaTime will change on a frame-by-frame basis, whereas FixedUpdate() may run once, zero, or multiple times per frame. I also suggest reducing the value of your "force" variable at the same time to around its current value divided by ~60 or it will have a very high velocity when you remove Time.deltaTime.

 

Thanks,
it kinda worked. I found out that when simply moving with transform.position += force * transform.forward; in the update function there is not jittering when using force however i have again high amout of jittering