Fixing Oculus Mixed Reality Capture Camera pose

[fabio914]

Changes

This is an attempt to solve #44 without modifying the Oculus Integration Package.

• This PR fixes the issues with the Oculus Mixed Reality camera positions because of the different units used by Open Brush (decimeters instead of meters).

This PR is similar to #70, however, it doesn't have the changes for Reality Mixer.

cc @mikeage @mikeskydev

[TimAidley]

I'm excited to see this one in! I had a minor nit about line length.

[mikeskydev]

Good idea to split them off, thanks! Will give this a test tonight and get it in.

[mikeskydev]

Gave this a shot with my webcam but was struggling to get a proper calibration going, will try tomorrow morning on our full MR setup. However, I did notice that the world camera capture seemed to move when I titled my head side to side, which probably shouldn't be happening with MR?

[fabio914]

but was struggling to get a proper calibration going

The Oculus MRC Calibration app is freezing for me from time to time when I try to calibrate. Were you experiencing something similar? This started happening for me after my Quest started using version 27 of the system.

However, I did notice that the world camera capture seemed to move when I tilted my head side to side, which probably shouldn't be happening with MR?

I tested again here, and I also noticed some movement, although it's very hard to notice (see the video below). My guess is that this happens because this update with the fix is out of sync with the MRC update (probably 1 or more frames apart), so the matrix for the head position that we're using here doesn't match exactly the one being used when the MRC camera position is being computed.

output.mp4

[mikeskydev]

Got it working great, just needed a better calibration! Thanks for sorting this!