2d platformer player jitter when add velocity

Hi,

I'm trying to make platformer player that moving forward and backward.

Player is simple sprite

Here is my code:

private void FixedUpdate()
{
moveInput = Input.GetAxisRaw("Horizontal");
rb.velocity = new Vector2(moveInput * speed, rb.velocity.y);
}


But when I try to move player I feel jitter (player not smooth moving) . Can problem be some settings in unity or problem is in code ?
Also I try this code in Update and LateUpdate but still not smooth moving

When I use follow player script player moves smooth but then camera jitter (not moving smooth) Here is my folow camera code:


void FixedUpdate()
{
Vector3 playerPos = player.position;
playerPos.z = transform.position.z;
transform.position = Vector3.SmoothDamp(transform.position, playerPos, ref velocity, smoothTime);
transform.position = new Vector3(Mathf.Clamp(transform.position.x, minCameraPos.x, maxCameraPos.x),Mathf.Clamp(transform.position.y, minCameraPos.y, maxCameraPos.y),
Mathf.Clamp(transform.position.z, minCameraPos.z, maxCameraPos.z));
}


I create new simplest project with one scene, one script and code only for moving player , not camera follow and again player jitter, I build android apk and jitter againon my 8GB RAM phone .This is so weird

Please help me. Thanks!

 

Hello,

It's maybe because you need to multiply the speed by Time.fixedDeltaTime.

Also when posting code in Unity forums you should use the "insert code" functionnality like so :

Code (CSharp):

1. private void FixedUpdate()
2. {
3. moveInput = Input.GetAxisRaw("Horizontal");
4. rb.velocity = new Vector2(moveInput * speed * Time.fixedDeltaTime, rb.velocity.y);
5. }

As a side note, you should take a look at the proper ways to move a 2D sprite if you're using or not using physics.
Generally speaking I was told that you should not change the velocity directly.

Hope this helps !

 

I try with Time.fixedDeltaTime and same result again.
I'm impossible to get a smooth motion in player movement. Is there any way to reset all Unity settings ? I sure that this is Unity problem.
Its so simple code, and it doesn't work as expected.I read lot about FixedUpdate, Update...
My previous game use the same code for movement and work fine.

 

Your camera update should be in LateUpdate

 

That was my problem, thank you so much. Movements alot more smooth now.

 

2d player run jitter, rb.velocity = vector2() in fixedUpdate() and interpolation is true, no camera follow player

==> Unity 2d game

public class PlayerController : MonoBehaviour {
private void Update() {
moveInput = joystick.Horizontal;
}
void FixedUpdate() {
rb.velocity = new Vector2(moveInput * speed, rb.velocity.y);
}
}

==> not camera follow to player

==> if camera follow player then player not jitter but background jitter, if camera set to Lear() then Player slightly jitter and background steel jitter. ==> try camera follow in LateUpdate() lightly jitter and FixedUpdate() more jittery

==> interpolate = interpolate in rigidbody2D porpertys
==> witout interpolate big jitter , set interpolat property steel smallest jitter in unity 2d player.
==>vsync count on or off steel smallest jitter on pc or android device. ==>not use more graphic in scenes just 5,6 images.
==> Please solve this problem else leave the unity
==> also player is not animated. it's just image.

==>Email : alpeshlilapara@gmail.com
==>Email : alpeshlilapara1@gmail.com
==>Email : Eldertechsystem@gmail.com

 

In FixedUpdate No need multiply Time.fixedDeltaTime

 

Set to interpolate in RigidBody, this fix the jittering. Also, in camera script > set to LateUpdate.