Multyplayer: create a function from a server to al clients without respawn

Hi everybody,
I'm stuck with a simple function that it's similar to this example:

One gray cube in scene (not respawned just a single static cube in all clients player without controls, nothing at all)
a script that would say: if press spacebar (in the local machine) make the cube blue in all clients.

i've tried following the simple multyplayer tutorial messing up with [SyncVar] and [Command] or (isServer)(isLocal)... Now i've restarted from scratch and write few line of code and put it in a empty gameobject
(that is my player Prefab).

Please can you help me?

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.Networking;
5.  
6. public class serverCtrl : NetworkBehaviour {
7.  
8.     public GameObject cube;
9.  
10.     // Use this for initialization
11.     void Start () {
12.         cube = GameObject.Find("Cube");
13.     }
14.    
15.     // Update is called once per frame
16.     void Update () {
17.  
18.         if (Input.GetKeyDown(KeyCode.Space))
19.         {
20.             changeColor();
21.         }
22.        
23.     }
24.  
25.     void changeColor()
26.     {
27.      cube.GetComponent<MeshRenderer>().material.color = Color.red;
28.     }
29. }

 

Use Attributes and understand how the client/server relationship works.

https://docs.unity3d.com/ScriptReference/Networking.CommandAttribute.html
https://docs.unity3d.com/ScriptReference/Networking.ClientRpcAttribute.html
https://docs.unity3d.com/ScriptReference/Networking.ServerAttribute.html

 

thank's a lot! Seems that clientRpc it's a good way

 

It's work with [clientRpc] the object must be in Local player authority! Thank you

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.Networking;
5.  
6. public class serverCtrl : NetworkBehaviour {
7.  
8.     public GameObject cube;
9.    
10.     // Use this for initialization
11.     void Start ()
12.     {
13.         cube = GameObject.Find("Cube");
14.     }
15.    
16.     // Update is called once per frame
17.     void Update () {
18.  
19.         if (Input.GetKeyDown(KeyCode.Space))
20.         {
21.             RpcchangeColor();
22.         }
23.        
24.     }
25.     [ClientRpc]//[ClientRPC] functions are called by code on Unity Multiplayer servers, and then invoked on corresponding GameObjects on clients connected to the server.
26.     public void RpcchangeColor()
27.     {
28.      cube.GetComponent<MeshRenderer>().material.color = Color.red;
29.     }
30. }