Third Party Photon: Inaccurate && Jittery position Sync

Hi! First i'd like to say that i just started learning Photon and Multiplayer in general 2~3 days ago, and I ran across this problem, I will try to explain the best i can:

Movement: Player Objects are always moving, they can slow down or Speed up but they will always be moving.

Photon settings: Im using Photon Transform view with Photon view:


Note that: when the player objects are not constantly moving (Moves forward only on player input, it's smooth and has accurate position)

Video:

 

Hi, I know it's a dead post, but I got this problem and I solved it myself.

this script is to attach to the gameobject to move:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using Photon.Pun;
4. using UnityEngine;
5.  
6. [RequireComponent(typeof(Rigidbody))]
7. public class Car : MonoBehaviourPun, IPunObservable
8. {
9.     public float speed = 900f;
10.     public float rotationSpeed = 100f;
11.    
12.     private Rigidbody _rigidbody;
13.     private float _inputX;
14.     private float _inputY;
15.     private Vector3 _netPosition;
16.     private Quaternion _netRotation;
17.     private Vector3 _previousPos;
18.    
19.     private void Awake()
20.     {
21.         _rigidbody = gameObject.GetComponent<Rigidbody>();
22.     }
23.    
24.     public void OnPhotonSerializeView(PhotonStream stream, PhotonMessageInfo info)
25.     {
26.         if (stream.IsWriting)
27.         {
28.             stream.SendNext(_rigidbody.position);
29.             stream.SendNext(_rigidbody.rotation);
30.             stream.SendNext(_rigidbody.velocity);
31.         }
32.         else
33.         {
34.             _netPosition = (Vector3)stream.ReceiveNext();
35.             _netRotation = (Quaternion)stream.ReceiveNext();
36.             _rigidbody.velocity = (Vector3)stream.ReceiveNext();
37.            
38.             float lag = Mathf.Abs((float)(PhotonNetwork.Time - info.SentServerTime));
39.             _netPosition += (_rigidbody.velocity * lag);
40.             ShowInfo.Instance.text.text = lag.ToString();
41.         }
42.     }
43.    
44.     void FixedUpdate()
45.     {
46.         if (photonView.IsMine)
47.         {
48.             _inputY = Input.GetAxis("Vertical");
49.             _inputX = Input.GetAxis("Horizontal");
50.  
51.             _rigidbody.AddForce(transform.forward * speed * _inputY * Time.deltaTime, ForceMode.Acceleration);
52.             transform.Rotate(Vector3.up * rotationSpeed * _inputX * Time.deltaTime);
53.         }
54.         else
55.         {
56.             _rigidbody.position = Vector3.MoveTowards(_rigidbody.position, _netPosition, Time.fixedDeltaTime);
57.             _rigidbody.rotation = Quaternion.RotateTowards(_rigidbody.rotation, _netRotation, Time.fixedDeltaTime * 100.0f);
58.         }
59.     }
60. }
61.  

Remove from gameobject the Photon Transform View, because this script handles itself the sync

 

Hello LorisToia, this solution looks perfect for me. My only question is, how do you decide the

Code (CSharp):

1. public float speed = 900f;
2. public float rotationSpeed = 100f;

because I added them and now my players are suddenly moving faster (which I assume it is from the high speed). For reference, this is how I calculate my movement and rotation:

Code (CSharp):

1. void Move()
2. {
3.     Vector2 moveInput = playerInput.actions["Move"].ReadValue<Vector2>();
4.     Vector3 move = moveInput * movementSpeed;
5.  
6.     if(!groundCheck.isGrounded && !flightMode) move *= 0.1f;
7.  
8.     Vector3 forward = transform.forward;
9.     Vector3 right = transform.right;
10.  
11.     rb.velocity += forward * move.y;
12.     rb.velocity += right * move.x;
13. }

Code (CSharp):

1. void MousePosition() // For the rotation of the player
2. {
3.     Vector2 mouseDelta = playerInput.actions["Mouse Delta"].ReadValue<Vector2>();
4.     Vector2 rawFrameVelocity = Vector2.Scale(mouseDelta, Vector2.one * mouseSensitivity * 0.01f);
5.     frameVelocity = Vector2.Lerp(frameVelocity, rawFrameVelocity, 1 / mouseSmoothing);
6.     mouseVelocity += frameVelocity;
7.     mouseVelocity.y = Mathf.Clamp(mouseVelocity.y, -90, 90);
8.  
9.     cameraTransform.localRotation = Quaternion.AngleAxis(-mouseVelocity.y, Vector3.right);
10.     transform.localRotation = Quaternion.AngleAxis(mouseVelocity.x, Vector3.up);
11. }

Would my speed just be my

movementSpeed

variable since the

moveInput

is always 0 or 1. That sounds simple enough, but the movement felt jittery when I did that.

What about the rotation? Would it be

mouseSensitivity * 0.01f

?

Also finally, when I "start" my game, I teleport all my players to a far position. I realized with this code players don't see each other once teleported. Should I add some sort of "teleport if distance is 3<" to this script?

 

Okay I have been working on this for the past half hour and here are the things I have realized/changed:

1. I don't care about the speed or the rotation part because it is just for moving your own character, I do that in another script anyways.

2. The teleportation was fairly easy to implement:

Code (CSharp):

1. public bool teleportIfFar;
2. public float teleportIfFarDistance;

Code (CSharp):

1. void FixedUpdate()
2. {
3.     if(photonView.IsMine) return; // Only for objects that are not yours
4.  
5.     _rigidbody.position = Vector3.MoveTowards(_rigidbody.position, _netPosition, Time.fixedDeltaTime);
6.     _rigidbody.rotation = Quaternion.RotateTowards(_rigidbody.rotation, _netRotation, Time.fixedDeltaTime * 100.0f);
7.  
8.     if(Vector3.Distance(_rigidbody.position, _netPosition) > teleportIfFarDistance)
9.     {
10.         _rigidbody.position = _netPosition;
11.     }
12. }

One thing to note is, when my rates are 30 for send, 10 for serialization it still feels a little laggy. So I use 30/30 but I know that is not very ideal, still looking for better "compensation" methods to make the movement smoother.

EDIT: I actually fixed this issue syncing rigid bodies instead. The solution works perfectly for me, instead of writing a whole bunch I'll just link my video where I go over the changes.