Objectpool used in Networking

Unity Engine
1

This subject prepares me a headache…

My problem:
The player can place bombs wich should be synch other the network, because of time and position and velocity (can be kicked away etc) so they have attached a networkview. All the important decisions should do the server, like damage on objects, players, etc.

I’ll use a ObjectPooler Script for pool the bombs.

public class BombPoolerScript : MonoBehaviour {
    public GameObject pooledObject;
    public int pooledAmount = 20;
    public bool willGrow = true;

    public List<GameObject> pooledObjects;

    void Start() {
        pooledObjects = new List<GameObject>();
        for (int i = 0; i < pooledAmount; i++) {
            GameObject obj = Instantiate(pooledObject) as GameObject;
            obj.SetActive(false);
            obj.GetComponent<BombScript>().enabled = true;
            pooledObjects.Add(obj);
        }
    }

    public GameObject GetPooledObject() {
        for (int i = 0; i < pooledObjects.Count; i++) {
            if (!pooledObjects[i].activeInHierarchy) {
                return pooledObjects[i];
            }
        }

        if (willGrow) {
            GameObject obj = Instantiate(pooledObject) as GameObject;
            pooledObjects.Add(obj);
            obj.GetComponent<BombScript>().enabled = true;
            return obj;
        }

        return null;
    }
}

What is the best way to do this over the network?

my first approach was to always allocate a new networkview id to a bomb…

void Update() {
        if (!networkView.isMine) {
            return;
        }

        bool placeBomb = false;
        #if UNITY_ANDROID
            placeBomb = CustomInput.GetButtonUp("PlaceBomb");
        #else
            placeBomb = Input.GetButtonUp("PlaceBomb");
        #endif
        if (Input.GetButtonUp("PlaceBomb") && CanPlaceBomb()) {         
           GameResults.placedBombs++;
        
            var pos = transform.position;
            pos.x = Mathf.Round(pos.x);
            pos.z = Mathf.Round(pos.z);
            pos.y = 0;
            foreach (var poolBomb in bombpooler.pooledObjects) {
                if (poolBomb.activeInHierarchy && poolBomb.transform.position == pos) {
                    return;
                }
            }
            var viewID = Network.AllocateViewID();
            networkView.RPC("PlaceBomb", RPCMode.All, pos, viewID);
        }
    
    }

    [RPC]
    void PlaceBomb(Vector3 pos, NetworkViewID viewID) {
        var bombObj = bombpooler.GetPooledObject();
        bombObj.networkView.viewID = viewID;
        var bomb = bombObj.GetComponent<BombScript>();
        bomb.time = time;
        bomb.range = range;

        bombObj.transform.position = pos;
        bombObj.SetActive(true);
    }

But i run into problems with synch. if I want to find the networkview of the bomb to get the reference to bombscript.

With static ViewId I run into the following problem:
The following state is possible with an static viewID attached to the bomb:

  1. placed bomb by the Client A explode on the Client A but not on Client B (some ms later)
  2. bomb is again available in the poolerscript on Client A but not on Client B (some ms later)
  3. Client A places the same bomb again but on Client B its still active and not exploded…
  4. the bomb on Client B dont exploded and placed to the new position… (should not happened)

But I need static viewID for finding the bomb… on other objects, because of the reference to the bombscript

I hope I could convey my problem properly :wink:

2

Could you elaborate on that? Why would you need a static NetworkViewID to find the Script-Component of an Object?

3

I love this moments :smile:

On thinking about the answer of your question, I solved my problem…
I don’t realy need a bomb script reference.

This happeneds if you port a singleplayer game to multiplayer :smile:
So ok, finaly my solution of Objectpool script works for me :wink:

Maybe I inspirit someone else, who need a Objectpool script, that works for Multiplayer… :wink: