Hydra controllers report a position where the base station is the origin (0,0,0), so as long as the base station doesn't move and you're within range of detection, a hydra controller reports an absolute position in physical space.
Given that, after you attach a controller to your head somewhere, I think all you'd have to do is remember the initial position of the controller when the game/app starts up, and then every frame simply add "current minus initial" position to your in-game head position in local space.
And, all this assumes you've already calibrated hydra movement sensitivity to get 1-1 movement.
"tbowren" wrote: That is my video with my kids. I have made a simple tutorial showing how to set this up and will be releasing it soon on RoadtoVR.com.
Hi Tony, that was a cool vid. One of my favourites actually as i think adding the position tracking would really open a few things up. The Kinect integrations look equally compelling. Please do post up link once you get it published!