Need help on laser interaction with NGUI UIs

[yifuqiao]

Hi, everyone.
I am working on a VR game, and I want to use NGUI.
The effect i am trying to achieve is described in this video:
https://www.youtube.com/watch?v=mD16LejMc9A

Basically, I want to interact with the NGUI UIs with the lasers shooting from my controller object.
The video shows it was done by implementing a custom input module.
However, I am not sure what is the proper way to achieve the samething with NGUI.
I read through the recent threads, and I think the only closest thing I have found is here:
http://www.tasharen.com/forum/index.php?topic=15063.0

It sounds like I need to implement a custom UICamera, and calling the delegates at the moment where I think the interaction should happen.

Could anyone confirm if I am on the right track.
VR gaming is popular nowadays, so I think this is probably done someone already.
I just want to make sure I am on the right track and not re-invent the wheels.

Thanks so much!

[yifuqiao]

Maybe I could just re-implement the code below?
It feels to me this is what NGUI uses to do raycast.
All i need to change is cast the ray from my controller, and UI camera should handle everything afer that.

1. static public Ray currentRay
2.         {
3.                 get
4.                 {
5.                         return (currentCamera != null && currentTouch != null) ?
6.                                 currentCamera.ScreenPointToRay(currentTouch.pos) : new Ray();
7.                 }
8.         }
9.  

[ArenMook]

UICamera.onCustomInput can be set to whatever you want it to be. Furthermore you have full access to all input events in NGUI -- such as UICamera.GetInputTouch and UICamera.GetInputTouchCount, letting you create custom input event sources easily.