Placing HMD on head stops Mouse input working (EventSystem), but keyboard is still okay.

Hi all,

I have an interesting issue that I think is caused by my not fully understanding the InputSystem yet.

VR Input works, and so does the Keyboard Input (which is set up on the relevant script itself, and not in an asset like the VR and Mouse Input - it only listens to the space bar after all).

The mouse input also works (using the same InputActionAsset as the VR, just a different ActionSet).

However, I cannot use the VR and Mouse input together. AS SOON as I put on the HMD, all UI buttons will stop responding to mouse clicks. As soon as I take it off again, I can click on buttons once more and have the desired response.

I'm using Unity 2021.2.7f1, InputSystem 1.3.0 and XR Plugin 4.2.1

Any thoughts would be greatly appreciated.

Kindest regards,


Mike

 

Solved:

If you have the Canvas set as "Screen Space - Overlay" then it will default to the XR camera for event (I had it XR rig set as Main Camera).

But, if you set thecanvas to "Screen Space - Camera", and assign the Desktop/Monitor Camera as it's Render Camera, then it's using this as the raycast point for events.

[Facepalm] In hindset it's a bit of a no-brainer, lol.

UPDATE:
This was either, not the solution, or not the entire solution. On the InputSystemUIInputModule, there is a dropdown entitled "Pointer behaviour" (see pic below). Setting this to "All Pointers As Is" fixed the solution for me. When I know why this works, I'll update further below.



Regards,

Mike

 

You're a savior.. I was losing my mind trying to find out why UnityXR would just block all mouse inputs when HMD is being worn and I was finding nothing but bug threads and unrelated issues.. And Unity's documentation is a joke as always

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