So if for someone who wants to set up a VR embodiment lab,
what kind of suggestions would you give them?
Yes. So if you want to set up a VR embodiment lab,
and actually we have a whole paper on how to do this.
It's a long paper that was published in frontiers and robotics and AI.
And so first of all, of course,
you need a head-tracked head-mounted display with as wide field of views as you can get.
Why is the field of view important?
Because you don't want to be searching for your body.
If the field of view is wide enough,
you just have to look down a little bit,
you see the virtual body.
So wide field of view,
head-tracked head-mounted display. Why head-tracked?
Because you have to be able to look down and see the body.
As I said, just looking down at the body is already enoug,
but normally, you want people to move.
So if people move,
you have to have some kind of body-tracking.
So what we've been using for several years is the OptiTrack body system,
which requires some infrared cameras around
the room and some markers on the body and so on.
And that works pretty well.
We've even used the Kinect,
which can track the body.
It's not as good, obviously,
and the price ratio is completely different.
It's like $200 compared with $15,000.
But anyway, it's possible to use a Kinect to
get some body-tracking and even more recently,
we've been using the HTC Vive wand
or hand-trackers and then using a technique called inverse kinematics.
Given that you know where the head is, in two hands,
you can pretty much work out where at least the upper body is.
So you can get some degree of full body-tracking with visual motion,
visual motor synchrony just with the head and a couple of hand trackers.
But its not ideal, but this is something, I think,
will change very rapidly in the technology that is being developed by VR companies..
Interesting. So the're different range of products
you can get depending on how was your budget.