Networking and NavMesh

Unity Engine
1

Good day!

Need help pliss, I am doing a game with navmesh navigation, i want send navMeshAgent.destination to server and in the server to all player, for “prefect syncro”, but not work good, the players move only in server.

using UnityEngine;
using System.Collections;
using UnityEngine.Networking;

public class ClassPlayerMovement : NetworkBehaviour
{
    public GameObject prefabBullet;
    public Transform bulletTransform;
    [SyncVar]
    NavMeshAgent navMeshAgent;

    void Awake()
    {
        navMeshAgent = GetComponent<NavMeshAgent>();
    }
   
    // Use this for initialization
    void Start ()
    {
   
    }
   
    // Update is called once per frame
    void Update ()
    {
        if(isLocalPlayer)
        {
            if(Input.GetMouseButton(1))
            {
                RaycastHit tempHit;
                Ray tempRay = Camera.main.ScreenPointToRay(Input.mousePosition);

                if(Physics.Raycast(tempRay, out tempHit, 100, LayerMask.GetMask("layerPlatform")))
                {
                    CmdScrClickAndMove(tempHit.point);
                }
            }

            if(Input.GetKeyDown(KeyCode.Q))
            {
                RaycastHit tempHit;

                Ray tempRay = Camera.main.ScreenPointToRay(Input.mousePosition);
                Physics.Raycast(tempRay, out tempHit, 100, LayerMask.GetMask("layerPlatform"));

                CmdScrPowerQActive(new Vector3(tempHit.point.x, bulletTransform.position.y, tempHit.point.z));
            }
        }
    }

    [Command]
    void CmdScrClickAndMove(Vector3 destination)
    {
        navMeshAgent.SetDestination(destination);
    }

    [Command]
    void CmdScrPowerQActive(Vector3 direction)
    {
        var tempBullet = (GameObject) Instantiate(prefabBullet, bulletTransform.position, Quaternion.identity);

        tempBullet.transform.LookAt(direction);
        tempBullet.GetComponent<Rigidbody>().velocity = tempBullet.transform.forward*8;
        Destroy(tempBullet, 0.45f);

        NetworkServer.Spawn(tempBullet);
    }
}

The players are network identity, an local player autority.

How solve this problem?

Thanks uniters!

2

It’s only working on the server because you’re not propagating it back out to clients.

Step A - Player chooses were to move and sends that destination to the server via a Command.
Step B - Server verifies that’s a valid place to move, and sends the destination out to all clients including the one that sent it via a ClientRpc.
Step C - The server and clients move the player to where it’s supposed to be.

1 Like
3

thanks!

I make the script, and after comment if it’s work.

4

Thanks for your algorimt! this solution to works:

if(Input.GetMouseButton(1))
{
        RaycastHit tempHit;
        Ray tempRay = Camera.main.ScreenPointToRay(Input.mousePosition);

        if(Physics.Raycast(tempRay, out tempHit, 100, LayerMask.GetMask("layerPlatform")))
        {//Step A
                CmdScrPlayerSetDestination(tempHit.point);
        }
}

[Command]
public void CmdScrPlayerSetDestination(Vector3 argPosition)
{//Step B, I do simple work, I not verifi a valid position in server, I only send to all clients
        RpcScrPlayerSetDestination(argPosition);     
}

[ClientRpc]
public void RpcScrPlayerSetDestination(Vector3 argPosition)
{//Step C, only the clients move
        navMeshAgent.SetDestination(argPosition); 
}
1 Like
5

Nice. Just make sure you execute the navMeshAgent.SetDestination() in the command as well so that the players move on the server as well.

6

Couldn’t you just make argPosition a [syncvar] and forego the RPC? - reassigning the destination/argposition on update?

What are the disadvantages to this approach?