Vive VR Line trace hit on a widget button question

Development Programming & Scripting Blueprint
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Hi All

I am creating a widget that rotation follows the camera wherever I turn. One of motion controller can be able to shoot a line trace onto the widget button, which eventually triggers the function. This function is going to be switching actor materials.

I could not figure out how to trigger that button to switch the material. Can anyone help me?
Thanks in advance.

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This video is what you need: Blueprint Communications | Live Training | Unreal Engine - YouTube

It is a bit lengthy, but I promise you, it’s well worth it.

TL;DR: you need to get the reference from of the actor’s material to the widget or vice versa

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Yes I have seen that. It was very useful. I have solved the issue.
Thanks a lot.