VR Multiplayer - how to change gameobjects on bullet hit.

Hello all.

So i am working on this multiplayer VR game.
Its like a paintball shooter, so what i want to do is to change colors on the scene gameobjects when hit by a bullet and then be sure that all players get the changes.

Question 1:
Do i need to spawn the gameobjects on server start to be able to change them across all clients?

Question 2:
How would you handle the command to get all clients to see the change?

What i have tried so far:

Code (CSharp):

1.  
2. void OnCollisionEnter(Collision collision)
3.     {
4.         Debug.Log("cube hit");
5.         if (collision.gameObject.tag == "Bullet")
6.         {
7.             objectColor = collision.gameObject.GetComponent<Renderer>().material.color;
8.             objectID = this.gameObject;
9.             CmdPaint(objectID, objectColor);
10.         }
11.     }
12.  
13.    
14.  
15.     [ClientRpc]
16.     void RpcPaint(GameObject obj, Color col)
17.     {
18.         obj.GetComponent<Renderer>().material.color = col;      // this is the line that actually makes the change in color happen
19.     }
20.  
21.  
22.  
23.  
24.     [Command]
25.     void CmdPaint(GameObject obj, Color col)
26.     {
27.         objNetId = obj.GetComponent<NetworkIdentity>();        // get the object's network ID
28.         objNetId.AssignClientAuthority(connectionToClient);    // assign authority to the player who is changing the color
29.         RpcPaint(obj, col);                                    // usse a Client RPC function to "paint" the object on all clients
30.         objNetId.RemoveClientAuthority(connectionToClient);    // remove the authority from the player who changed the color
31.     }

Here i get the error that connectionToClient is null.

Hope this is enough for you guys to give me some help, else let me know and i will try to elaborate more.

Thanks!

 

Bump

 

What is this object is it a player or just an object

 

The object is a cube in the scene. The object is not spawned through the network manager, but is part of the scene already.

 

if you create a server authority object (not player authority) you can't send command to server.

Try this

let think that OnCollisionEnter will be invoked on both client and server

Code (CSharp):

1.  
2.     // Invoke on both server and client (if you done correct)
3.     void OnCollisionEnter(Collision collision)
4.     {
5.         if (collision.gameObject.tag == "Bullet")
6.         {
7.             if (isServer)
8.             {
9.                 objectColor = collision.gameObject.GetComponent<Renderer>().material.color;
10.                 obj.GetComponent<Renderer>().material.color = objectColor;
11.                 RpcPaint(objectID, objectColor);
12.             }
13.         }
14.     }
15.  
16.     [ClientRpc]
17.     void RpcPaint(GameObject obj, Color col)
18.     {
19.         obj.GetComponent<Renderer>().material.color = col;      // this is the line that actually makes the change in color happen
20.     }

 

It worked somehow, will play around with it for a bit and see if it fits my needs. Thanks man!