State in a custom InputProcessor?

Questions & Answers
1

I’m using the new input system, and I have an action that I want to be able to perform from either the mouse & keyboard, or via a gamepad, and I figured I could accomplish this by using a custom InputProcessor.

My idea: I want a vector that denotes the direction the player is holding the right stick, and I want an equivalent of that with the mouse & keyboard, being the direction from the player (in screen coords) the the mouse position.

Is there any way to do this? I figure I need some kind of state stored within the processor that knows the player’s position on screen.

2

I figured out a way to do this, but it feels a tiny bit hacky. I’m holding on to references that are pulled on creation.

    GameObject Player = GameObject.Find("Player");
    Camera PlayerCam = Camera.main;

    #region Register in editor
    #if UNITY_EDITOR
    static MousePositionToCamera()
    {
        Initialize();
    }
    #endif

    [RuntimeInitializeOnLoadMethod]
    static void Initialize()
    {
        InputSystem.RegisterProcessor<MousePositionToCamera>();
    }
    #endregion
    
    /// <summary>
    /// Returns the direction from the player's on-screen coordinates to where the
    /// mouse's position is relative to the world
    /// </summary>
    /// <param name="value"></param>
    /// <param name="control"></param>
    /// <returns></returns>
    public override Vector2 Process(Vector2 value, InputControl control)
    {
        var playerPosition = (Vector2)PlayerCam.WorldToViewportPoint(Player.transform.position);
        var mousePosition = (Vector2)PlayerCam.ScreenToViewportPoint(value);

        return (mousePosition - playerPosition).normalized;
    }

I’m curious if there’s any better way to accomplish this!