Integrate scene click capability from original viewer #2509
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In the original viewer, a user could click on a point in the screen, to specify a "ray"-like interaction (akin to a pointer finger stick originating from the client camera, going through the clicked pixel on the image plane).
This replicates the original capability in viewer_beta, with a few differences:
unregister_click_cb
)ViewerClicks
) inside a function that takes as inputScenePointerEvent
, for viser-nerfstudio compatibility.(Implementation based on the recently integrated viser PR nerfstudio-project/viser#106)