Question The input from any controller fires the input event from every controller

Hello!

My problem
I'm trying to make a simple couch coop game but every time, someone pushes a button on any controller, the input action from every player gets triggered.

The setup
I have a gameObject with a playerInputManager component attached:


The player prefab has a playerInput component:

I also added my own playerController script to it.

playerController.cs

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.InputSystem;
5.  
6. public class playerController : MonoBehaviour
7. {
8.     Input controls;
9.     public boxController boxController;
10.  
11.  
12.     [SerializeField]
13.     int playerNr;
14.  
15.     void Awake()
16.     {
17.         controls = new Input();
18.         controls.threeBoxes.boxLeft.performed += context => inputForwarder("boxLeft");
19.         controls.threeBoxes.boxMiddle.performed += context => inputForwarder("boxMiddle");
20.         controls.threeBoxes.boxRight.performed += context => inputForwarder("boxRight");
21.  
22.     }
23.  
24.     private void Start()
25.     {
26.         boxController = GameObject.Find("threeBoxes").GetComponent<boxController>();
27.  
28.         playerNr = gameObject.GetComponent<PlayerInput>().splitScreenIndex;
29.  
30.     }
31.  
32.   ]void inputForwarder(string whichInput)
33.     {
34.         boxController.inputReceiver(whichInput, playerNr);
35.     }
36.  
37.     private void OnEnable()
38.     {
39.         controls.threeBoxes.Enable();
40.     }
41.  
42.     private void OnDisable()
43.     {
44.         controls.threeBoxes.Disable();
45.     }
46. }

boxController.cs

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using UnityEngine.InputSystem;
5.  
6. public class boxController : MonoBehaviour
7. {
8.  
9.     public void inputReceiver(string whichInput, int playerNr)
10.     {
11.        Debug.Log(whichInput+" "+playerNr);
12.     }
13.  
14. }

And if press any button on one of the controllers, I get the Debug.Log message two times (always first from the first player, then from the second one, regardless of who pushed the button).

I absolutely don't get why that happens ... do you have any idea, what the problem could be?

Thank you very much!

 

I kind of solved it without really understanding why ...

Instead of writing down every input in the code like

Code (CSharp):

1. controls.threeBoxes.boxLeft.performed += context => inputForwarder("boxLeft");

like it was done in the most tutorials I watched, I used the inspector instead as in this video:

. In the player input component, under the headline "Events" I found every input action I defined in the input action asset.
When I add a callback context in a script attached to the player prefab like

Code (CSharp):

1. public void BoxLeftForwarder(InputAction.CallbackContext context)
2.     {
3.         Debug.Log("Test");
4.  
5.     }

when I add my player prefab in the inspector I can choose the new method and it works:


Now, every input is only triggered by the player, who did it.

When my method wants to start a method in another script and I want to know, from which gamepad it came, I can add

Code (CSharp):

1. gameObject.GetComponent<PlayerInput>().splitScreenIndex

to have an unique identifier, where that come from.

Only open question for me at the moment is:
When I press something on the first controller, it fires two times - one for splitScreenIndex -1 and one for splitScreenIndex 0 - I don't get where the -1 comes from ...