Strange bug with bullet spawning

Hi,

I have a strange bug with my bullets. When a client fires, I can see the bullet instantiation, initializes and moving on the host machine but bullet instantiates but doesn't move on the client machines.

I fire bullets with calling a Command on the server with this code

Code (csharp):

1.  
2.   public void CmdFireProjectile(float Speed, int Damage, int RicochetTimes, float aimInDegrees, Vector2 velocity, float timeToLiveModifier)
3.   {
4.   // we instantiate the projectile at the projectileFireLocation's position.
5.   GameObject projectile = (GameObject)Instantiate(
6.   ProjectilePrefab.gameObject,
7.   transform.position, /*ProjectileFireLocation.position*/
8.   transform.rotation
9.   );
10.  
11.   projectile.GetComponent<BaseProjectile>().Owner = gameObject;
12.   projectile.GetComponent<BaseProjectile>()._speed = Speed;
13.   projectile.GetComponent<BaseProjectile>()._damage = Damage;
14.   projectile.GetComponent<BaseProjectile>().remainingRichocets = RicochetTimes;
15.   projectile.GetComponent<BaseProjectile>().Direction = new Vector2(Mathf.Cos(Mathf.Deg2Rad * aimInDegrees), Mathf.Sin(Mathf.Deg2Rad * aimInDegrees));
16.   projectile.GetComponent<BaseProjectile>().InitialVelocity = velocity;
17.   projectile.GetComponent<BaseProjectile>().TimeToLive = timeToLiveModifier;
18.   projectile.GetComponent<BaseProjectile>().lineRenderer.SetColors(ColorTint, new Color(ColorTint.r, ColorTint.g, ColorTint.b, 0));
19.  
20.   projectile.GetComponent<BaseProjectile>().lastPosition = transform.position;
21.  
22.   projectile.gameObject.name += "_" + "Player"; // +  gameObject.GetComponentInParent<PlayerController>().PlayerId;
23.  
24.   NetworkServer.Spawn(projectile);
25.  
26.   }
27.  
28.  

What can cause this behaviour? What am I missing here?

Thanks

 

The first thing you should do is cache that GetComponent.

Code (csharp):

1.  
2.   public void CmdFireProjectile(float Speed, int Damage, int RicochetTimes, float aimInDegrees, Vector2 velocity, float timeToLiveModifier)
3.   {
4.   // we instantiate the projectile at the projectileFireLocation's position.
5.   GameObject projectile = (GameObject)Instantiate(
6.   ProjectilePrefab.gameObject,
7.   transform.position, /*ProjectileFireLocation.position*/
8.   transform.rotation
9.   );
10.  
11.   // cache it. call GetComponent once.
12.   bp = projectile.GetComponent<BaseProjectile>();
13.  
14.   bp.Owner = gameObject;
15.   bp._speed = Speed;
16.   bp._damage = Damage;
17.   bp.remainingRichocets = RicochetTimes;
18.   bp.Direction = new Vector2(Mathf.Cos(Mathf.Deg2Rad * aimInDegrees), Mathf.Sin(Mathf.Deg2Rad * aimInDegrees));
19.   bp.InitialVelocity = velocity;
20.   bp.TimeToLive = timeToLiveModifier;
21.   bp.lineRenderer.SetColors(ColorTint, new Color(ColorTint.r, ColorTint.g, ColorTint.b, 0));
22.  
23.   bp.lastPosition = transform.position;
24.  
25.   projectile.gameObject.name += "_" + "Player"; // +  gameObject.GetComponentInParent<PlayerController>().PlayerId;
26.  
27.   NetworkServer.Spawn(projectile);
28.  
29.   }
30.  
31.  

 

Thanks but that's not the problem here. I'm trying to "make it work" first so I avoid any optimizations for now.

 

Are you using BaseProjectile.InitialVelocity in some other method to move it? If so I would debug if that method runs and if InitialVelocity is getting passed to the client properly.

 

InitialVelocity is just player's speed that I add to bullet initially.

 

I've investigated the problem more. Problem is all values are zero, despite being initialized by Command.

I've studied Invaders sample and it's doing the same thing.

I instantiate the bullet, call Initialize on it and then move it with Translate. So why on the client side, all the values of BaseProjectile are zero?

I thought I have to sync them with SyncVars but apparently not.

Any guess would help at this stage.

 

Hi Mr. Riley, big fan!

Yes there is. It's Network Send Rate is set to zero, sync mode is set to Rigidbody 2D and Rotation to none.
(I've tried to mimic what you've done in Unite 2014 and Invaders sample project)

I'm trying to avoid Network Transform as my bullets don't have a rigidbody2D and as I understood, setting sync mode to Transform, it won't do interpolation.

Problem is the initialized values from Command are not present in the clients other than the host.

Cheers.

 

Thanks

Problem is the initialized values from Command are not present in the clients other than the host

 

In other words, the bullet I instantiate and init in my Command appear on other clients but without the initialized values. Not just velocity is missing but everything else as well like TimeToLive, etc.

 

Same problem here... Waiting for a solution

 

Initialized values in the command missing in the client.

Code (CSharp):

1.  
2. [Command]
3.         void CmdTransmitUserInput(string userInput)
4.         {
5.             GameObject text = (GameObject)Instantiate(chatText, transform.position, transform.rotation);
6.             var chatTextInstance = text.GetComponent<ChatText>();
7.             chatTextInstance.text = userInput;
8.             chatTextInstance.playerTransform = transform;
9.  
10.             NetworkServer.Spawn(text);
11.          
12.         }
13.  

playerTransform is not using syncvar and is null on the client. Throws exception.
text property is using syncvar and its ok.

Should we use syncvar for every property in networkspawned objects?

 

From what I understood so far, yes.

 

Is there any other note like this on using uNet? And what should I read to know more of these beforehand?