Twin stick style aiming action with gamepad joystick and mouse bindings

ATM this does indeed require either separate actions or awkward if() handling in callbacks.

I'd recommend splitting this into one action meant to deliver screen-space 2D positions and one action delivering normalized direction vectors.

 

It's on the list (ISX-344). It'll likely be a processor to apply to screen position bindings and some API to set the reference point to use. It's possible to implement such a thing manually today. For example something like:

Code (CSharp):

1.     #if UNITY_EDITOR
2.     [InitializeOnLoad]
3.     #endif
4.     public class MouseDirectionProcessor : InputProcessor<Vector2>
5.     {
6.         public static Vector2 relativeToScreenPosition;
7.  
8.         static MouseDirectionProcessor()
9.         {
10.             InputSystem.RegisterProcessor<MouseDirectionProcessor>();
11.         }
12.         [RuntimeInitializeOnLoadMethod]
13.         private static void Initialize()
14.         {
15.         }
16.         public override Vector2 Process(Vector2 value, InputControl control)
17.         {
18.             return (value - s_RelativeToScrenPosition).normalized;
19.         }
20.     }