WebXR Hit Test Module (AR picking real world geometry)

Been working on integrating WebXR Hit Test module to the Engine.
It allows to raycast representation of the real world geometry by underlying AR system. So applications are various, like: placing objects in your rooms, or pictures on walls. Painting stuff on real world. Basic LIDAR. And more ways to anchor experience to the real world geometry.

Please take a look at PR and let me know your thoughts: https://github.com/playcanvas/engine/pull/1926

Once deployed, this project will be good to test: https://playcanvas.com/project/672464/overview/ar-hit-test
Don’t forget to enable WebXR Hit Test Module in chrome://flags as it is still a draft spec.

And small tweet about it:

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Engine is deployed now, here is a demo: https://playcanv.as/p/Kjol3uRS/

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