How to enable vive headset without lighthouse base stations

[wirelessdreamer]

I'm doing some testing using an optitrack system for tracking, but still want to use my vive pro for the image, and trackers for input, but am having a hard time finding the functions to call to enable the headset when it don't think it has tracking.

Any pointers?

[wirelessdreamer]

I thought I was still able to read controller input, but i'm not seeing any input from controllers when they have lost tracking either.