Shooting over the network

Hi,

I am trying to get shooting working via the network. The following code works, I can see myself shoot and it hits the opponent and scores. But the opponent can't see the bullets.

Code (CSharp):

1.            
2.  
3. //the following is within an update void
4.  
5. if (Time.time >= timestamp && (Input.GetButtonDown("Fire1")))
6.             {
7.                 Rigidbody instantiatedProjectile = Instantiate(projectile, transform.position + transform.forward * 1.0f, transform.rotation) as Rigidbody;              
8.                 instantiatedProjectile.velocity = transform.TransformDirection(new Vector3(0, 0,shootspeed));
9.                 Destroy (instantiatedProjectile.gameObject, 0.5f);
10.                 timestamp = Time.time + timeBetweenShots;
11.             }
12.  
13.  

What I have tried is using the following, but this seems to stop me shooting full stop. I have tried without the networkView.isMine but that doesn't help.

Code (CSharp):

1.      
2.  
3. //the following is within an update void
4.  
5. [URL='http://docs.unity3d.com/ScriptReference/NetworkView.html']NetworkView[/URL] networkView = GetComponent<NetworkView>();
6. if (networkView.[URL='http://unity3d.com/support/documentation/ScriptReference/30_search.html?q=isMine']isMine [/URL]&& Time.time >= timestamp && (Input.GetButtonDown("Fire1")))
7.             {
8. networkView.RPC ("Shoot", RPCMode.AllBuffered);
9.                 timestamp = Time.time + timeBetweenShots;
10.             }
11. ...
12.  
13. [RPC]
14.      void Shoot ()
15.      {
16.                 Rigidbody instantiatedProjectile = Instantiate(projectile, transform.position + transform.forward * 1.0f, transform.rotation) as Rigidbody;              
17.                 instantiatedProjectile.velocity = transform.TransformDirection(new Vector3(0, 0,shootspeed));
18.                 Destroy (instantiatedProjectile.gameObject, 0.5f);
19.      }
20.  
21.  
22.  

 

What you want is this:

Code (csharp):

1. Network.Instantiate(<object>,<Vector3 position>, <Quaternion rotation>, <group index, usually 1>);

This does all the hard RPC work for you.

 

Does that go into shoot function or forget about the function?

 

Yes, wherever you're instantiating the bullet.

 

Hi, thanks for your reply. I gave that a go, although I do remember trying it before, and what happens is the bullets can be seen by the other player, but they just instantiate and stack up at the point of instantiation, they don't move through the air as seen by the shooter. And when I say stack up, they actually stack up on each other, very strange looking.

 

I had the same, when I accidently forgot to put a Network View component on the ammo prefab I was trying to instantiate. Instantiating itself worked, but since adding the force was only happening on my side, the other client couldn't see the bullet going forward.

 

Hi Neat,

You could RPC the instantiation message an spawn the projectile locally (defining your physics rules locally on every computer).
Instead of using Network.Instantiate (blah); do something like networkView.RPC ("
InstantiateProyectile", RPCMode.All);

And implement the full projectile instantiation (with Instantiate, NOT Network.Instantiate) and initialization (velocity set, destruction time, etc) on the RPC function.

In this implementation you wouldn't need a NetworkView on the projectile, but some effort to make sure it's spawned consistently across all machines. For example, if you are spawning on the authoritative client (if we are not talking about IA) when the RPC reaches the server simulate the movement the projectile already made (theoretically) on the client.

Other option is to have a script on the projectile itself that applies the physics rules on Awake / Start time, although if you are going to synch projectile states it might get bandwidth heavy if there's a lot of them.

Hope it helps.

 

In a script on the player I spawn the projectile in the correct rotation and position and then I have a script on the projectile that handles the movement.
You can check out this guys tutorial for more help.