Why is my movement jittery?

Unity Engine
,
1

I’m sure it’s a update vs fixedupdate problem, but I cant figure out why.

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PlayerMovement : MonoBehaviour
{
    [SerializeField] float walkSpeed, runSpeed, crawlSpeed, airAcceleration, groundAcceleration, differentialAcceleration, differential, currentSpeed, targetSpeed;
    PlayerState playerState;
    Rigidbody myRigidbody;
    bool isFacingRight;
    // Start is called before the first frame update
    void Start()
    {
        isFacingRight = true;
        myRigidbody = GetComponent<Rigidbody>();
        playerState = GetComponent<PlayerState>();
       
    }
    private void Update()
    {
        targetSpeed = Input.GetAxis("XMovement");
        if (playerState.isCouching) targetSpeed = targetSpeed * crawlSpeed;
        if (!playerState.isCouching && !playerState.isRunning) targetSpeed = targetSpeed * walkSpeed;
        if (!playerState.isCouching && playerState.isRunning) targetSpeed = targetSpeed * runSpeed;
    }
    // Update is called once per frame
    void FixedUpdate()
    {
        currentSpeed = targetSpeed;
        Vector3 applyMovement = new Vector3(currentSpeed, 0, 0);
        applyMovement = applyMovement * Time.fixedDeltaTime;
        applyMovement += myRigidbody.position;
        myRigidbody.MovePosition(applyMovement);
    }
}

I’ve tried moving the inputs to the fixed update, but it still jitters.

EDIT: It seems to have issues in certain areas, not everywhere. From 0 to 8 on the x plane it jitters, and everything after is smooth.

2

Have you made sure to set your rigidbody to Interpolate?

1 Like
3

That was it.

Thanks!