Proper way to instantiate projectile in PUN?

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1

I’ve been fighting with Photon Unity Networking for a few days now with trying to instantiate my rocket projectile properly. I’ve been told by Tobias on the Exit Games forums that using PhotonNetwork.Instantiate is completely unnecessary (good thing, too… because it didn’t do anything) and that it’s best to just use an RPC call. I’ve tried that with this code:

void fireRocket(Vector3 bottleRocketStart,Quaternion bottleRocketRot)
{
GetComponent().RPC(“fireRocket_RPC”,PhotonTargets.MasterClient, transform.position,Quaternion.identity, nm.teamID);
GetComponent().currentItem =“”;
}
[RPC]
void fireRocket_RPC(Vector3 bottleRocketStart,Quaternion bottleRocketRot,int teamID)
{
bottleRocket =(GameObject)Instantiate(Resources.Load(“BottleRocketProjectile”), mouseWeaponOrigin.transform.position,Camera.main.transform.rotation);
bottleRocket.GetComponent().shotByPlayer = teamID;
}

This successfully spawns the rocket. However, I run into issues when trying to destroy the rocket in this script, which is attached to the rocket prefab.

voidOnCollisionEnter(Collision col)
{
if(col.gameObject.name !=“BottleRocketProjectile(Clone)”&& col.gameObject.name !=PhotonNetwork.playerName){
GetComponent().RPC(“spawnExplosion”,PhotonTargets.MasterClient);
GetComponent().RPC(“DestroyOnNetwork”,PhotonTargets.MasterClient);
}
}
[RPC]
void spawnExplosion()
{
GameObject bottleRocketSplat =(GameObject)Instantiate(Resources.Load(“BottleRocketSplat”), transform.position, transform.rotation);
}
[RPC]
publicvoidDestroyOnNetwork()
{
Destroy(gameObject);
}

The explosion is spawned, but the rocket is not destroyed. I get errors here complaining about viewIDs… which makes sense, since I’m not PhotonNetwork.Instantiating them. That’s where I’m losing track of what I’m supposed to be doing. If I’m not supposed to instantiate them on the network, how do I properly call the RPCs to handle the destruction of the rocket and instantiation of the explosion?

These are the errors I get on collision with something

Illegal view ID:0 method: spawnExplosion GO:BottleRocketProjectile(Clone)
UnityEngine.Debug:LogError(Object)
NetworkingPeer:RPC(PhotonView,String,PhotonTargets,Boolean,Object[ ])(at Assets/PhotonUnityNetworking/Plugins/PhotonNetwork/NetworkingPeer.cs:2915)
PhotonNetwork:RPC(PhotonView,String,PhotonTargets,Boolean,Object[ ])(at Assets/PhotonUnityNetworking/Plugins/PhotonNetwork/PhotonNetwork.cs:2496)
PhotonView:RpcSecure(String,PhotonTargets,Boolean,Object[ ])(at Assets/PhotonUnityNetworking/Plugins/PhotonNetwork/PhotonView.cs:589)
PhotonView:RPC(String,PhotonTargets,Object[ ])(at Assets/PhotonUnityNetworking/Plugins/PhotonNetwork/PhotonView.cs:557)
RocketInfo:OnCollisionEnter(Collision)(at Assets/RocketInfo.cs:24)

Illegal view ID:0 method:smile:estroyOnNetwork GO:BottleRocketProjectile(Clone)
UnityEngine.Debug:LogError(Object)
NetworkingPeer:RPC(PhotonView,String,PhotonTargets,Boolean,Object[ ])(at Assets/PhotonUnityNetworking/Plugins/PhotonNetwork/NetworkingPeer.cs:2915)
PhotonNetwork:RPC(PhotonView,String,PhotonTargets,Boolean,Object[ ])(at Assets/PhotonUnityNetworking/Plugins/PhotonNetwork/PhotonNetwork.cs:2496)
PhotonView:RpcSecure(String,PhotonTargets,Boolean,Object[ ])(at Assets/PhotonUnityNetworking/Plugins/PhotonNetwork/PhotonView.cs:589)
PhotonView:RPC(String,PhotonTargets,Object[ ])(at Assets/PhotonUnityNetworking/Plugins/PhotonNetwork/PhotonView.cs:557)
RocketInfo:OnCollisionEnter(Collision)(at Assets/RocketInfo.cs:25)

PhotonViewwith ID 0 has no method “DestroyOnNetwork” marked with the RPC or @RPC(JS) property! Args:
UnityEngine.Debug:LogError(Object)
NetworkingPeer:ExecuteRPC(Hashtable,PhotonPlayer)(at Assets/PhotonUnityNetworking/Plugins/PhotonNetwork/NetworkingPeer.cs:2190)
NetworkingPeer:RPC(PhotonView,String,PhotonTargets,Boolean,Object[ ])(at Assets/PhotonUnityNetworking/Plugins/PhotonNetwork/NetworkingPeer.cs:2979)
PhotonNetwork:RPC(PhotonView,String,PhotonTargets,Boolean,Object[ ])(at Assets/PhotonUnityNetworking/Plugins/PhotonNetwork/PhotonNetwork.cs:2496)
PhotonView:RpcSecure(String,PhotonTargets,Boolean,Object[ ])(at Assets/PhotonUnityNetworking/Plugins/PhotonNetwork/PhotonView.cs:589)
PhotonView:RPC(String,PhotonTargets,Object[ ])(at Assets/PhotonUnityNetworking/Plugins/PhotonNetwork/PhotonView.cs:557)
RocketInfo:OnCollisionEnter(Collision)(at Assets/RocketInfo.cs:25)

From what I’ve been reading elsewhere, the trick is to not put a PhotonView on the rocket, but I can’t grasp how to call an RPC on that gameobject if it doesn’t have a PhotonView. Anyone dealt with this before and can offer me a solution?

2

The problem is most likely that your collision detection runs on all clients and that all clients try to destroy the rocket.
More or less everyone will send the destroy (as far as I can judge from the code you posted) but there is only one rocket. Once that’s gone, the rest of the RPCs will fail, cause they refer to something no longer existing.

I would destroy the rocket locally only. Each client individually. That lets it explode exactly where the client saw it.
What you have to sync over the network is not that the rocket exploded but if it made damage. One client has to check if the rocket hit, then send “player X got Y damage” or “i got Y damage”.