ReconFab

This is a quick feature demo showing hand physics working in WebXR. To run this, simply open it in the Meta Quest browser.

This makes use of De-Panther’s WebXR Export and the Ultraleap Unity Plugin, which both come with their own set of samples which are generally more stable than this.

Getting this to work was really finicky and I’m having some trouble reproducing the initial environment, but having this as a base project could serve as a template for other things I’d like to do in the future.

Some things to note are that WebXR only works when accessing a web page with https://..., which initially tripped me up when attempting to test it with Github pages. Its performance overall is also pretty sluggish, particularly in the hand physics scene, which is something that I’ll need to look into going forward.

Added 2024-07-23: It was apparently possible to get things working again in Unity 6 by importing the WebXR Export and Ultraleap packages, and then replacing every reference to a Leap Provider with an XRHands Leap Provider, which comes as a prefab on the right click context menu under Ultraleap.

In general, it seems like using Ultraleap hands with WebXR results in a significant performance hit. I assume this is because of the rate at which the hand data is being polled, or because of any postprocessing done to the hand data in their libraries. Using the XR Interaction package also results in a performance hit, and in general it may be better to simply use the base sample of the WebXR Export package as a template for any future projects, using the samples in any other libraries as references to potentially desirable features.

Comparatively, MRTK3 running on WebXR seems more performant. A quick example of it running on WebXR can be seen here. Though it does seem to perform better, it’s still essentially built on the XR Interaction package, and its reliance on an external tool to acquire any required packages makes it more of a hassle to set up. I might explore using it again at some point in the future.