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Question Fetch XR handed-ness from an InputAction?

Discussion in 'Input System' started by Deleted User, Jun 7, 2020.

  1. Deleted User

    Deleted User

    Guest

    I'm hoping to create two generic action maps - each that uses values such as:

    XR Controller/PrimaryButton
    XR Controller/SecondaryButton

    And then filter those input actions myself to "left hand" and "right hand" so the player can easily swap their left/right action maps.

    I'm already using a monobehaviour and listening for the mapped events, but I see no way to filter or test if something is a left hand, other than something dumb like `name.Contains("Left")` which is pretty shaky.

    Is there some sort of left/right node buried in there that I can pull out?

    Right now the only solution I can see is to make duplicate action maps -

    XR Controller (Left) / PrimaryButton
    and
    XR Controller (Right) / PrimaryButton

    and manually swap between them with my own logic. This works okay, but any time I update the input controls I have to duplicate changes in multiple places to pull this off. Which is dangerous and frustrating!
     
  2. Rene-Damm

    Rene-Damm

    Joined:
    Sep 15, 2012
    Posts:
    1,779
    Code (CSharp):
    1. void OnMyAction(InputAction.CallbackContext context)
    2. {
    3.     var device = context.control.device;
    4.     if (device.usages.Contains(CommonUsages.LeftHand))
    5.         Debug.Log("Action triggered from left hand");
    6.     else if (device.usages.Contains(CommonUsages.RightHand))
    7.         Debug.Log("Action triggered from right hand");
    8.     else
    9.         Debug.Log("Action triggered with... no hands...");
    10. }
     
    belmansjef likes this.
  3. Deleted User

    Deleted User

    Guest

    That worked great, thanks!

    I sure wish CommonUsages had an enum I could use to make a dropdown selector or something, but I can work with this. :)
     
  4. Rene-Damm

    Rene-Damm

    Joined:
    Sep 15, 2012
    Posts:
    1,779
    While not exactly the same thing, it is possible to get "common usages" for a layout which could be used for populating a dropdown.

    Code (CSharp):
    1. // Get common ussags for "XRController" layout.
    2. var usages = InputSystem.LoadLayout("XRController").commonUsages;