Movement jitter every few seconds

Question

Hi All,

Project Link: https://www.dropbox.com/sh/7xqzoz6pbpke7ya/U2pNHVqzRX

I am trying to move basic box objects from right part of the screen towards left with Lerp. I am testing it on my android (Galaxy S4) It moves smooth but every few seconds screen jitters or stutter w$$anonymous$$ch is very annoying.I have searched everywhere but no solid solution to t$$anonymous$$s. With Vsync on its even worst.

I have also tried t$$anonymous$$s with object pooling, still same jitter. PLEASE HELPPPPP

I have tried the following;

Update
FixedUpdate
LateUpdate

And for movement;

Translate
Lerp
Move forward

not$$anonymous$$ng seems to be working and any help would be appreciated.

using UnityEngine; using System.Collections;

public class moveScript : MonoBehaviour {

 private Vector3 newPosition;
 public float speed = 10.0f;
 private int randomNum;

 void Update () {

     randomNum = Random.Range (0, 2);
     movers ();
     resetPosition ();

 
 }

 private void movers(){
     Vector3 posB = new Vector3 (transform.position.x - 5 * Time.fixedDeltaTime , transform.position.y, transform.position.z);
     newPosition = posB;
     transform.position = Vector3.Lerp (transform.position, newPosition, Time.smoothDeltaTime *  speed);
 }

 private void resetPosition ()
 {
     if (transform.position.x <= -4) 
     {
         if(randomNum > 0)
         {
             transform.position = new Vector3(5.0f,-0.2f,0.0f);
         }
         else
         {
             transform.position = new Vector3(5.0f,0.2f,0.0f);
         }
     }

 }

}

Answer 1

Answer by nikescar · Apr 21, 2014 at 12:45 AM

Try turning development build off. Profiling can help track down problem scripts and stuff but, it has a performance overhead since it sends data frequently. Also, in the profiler, click on the spikes and see what is causing them. My guess is the skipping will disappear when the profiler is no longer running.

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jaffer · Apr 22, 2014 at 03:28 PM 0

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development build is off and on my pc i dont see the jitter/hiccups anymore..but its major on android.i have tried different phones galaxy S4 and S3. same on both.

nikescar · Apr 22, 2014 at 08:06 PM 0

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Here is your project with my modifications

Look at my changes to the movers method. You didn't need to multiply posB by the Time.fixedDeltaTime because you are using lerp below that. Also, you want to match the deltaTime with the method you are using it in (if in Update use deltaTime, if in FIxedUpdate use fixedDeltaTime). I made this run in Update but, really, you want to move physics objects in FIxedUpdate always.

That said, I made the assumption that these were to be physics objects.

I also added a Rigidbody2D to each of your boxes (with isKinematic checked) because, if I remember correctly, it is less of a hit on performance when moving colliders.

This runs perfectly smooth on my Nexus 7.

Movement jitter every few seconds

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