cbwan wrote:This is definitely not "fixed position", this tracker is real 6DOF
For my purposes, I consider it fixed position if you have to stay within a 3 meter radius (room size). I can see how there is confusion over this classification though. Maybe I should separate into two categories:
fixed = <0.5 meter radius (TrackIR)
limited = <3 meter radius (Hydra, Kinect)
Ok
cbwan wrote:Most inertial sensors don't work for translations at all, even if they have accelerometers. So I would place most of them in the first category.
Especially all the so called 9DOF IMUs, which in the end can only give usable 3DOF data..
I was careful in my definition to state that they were only able to detect motion. True, you can't reliably double integrate the IMU's to gather positional information. But you can use raw accelerometer and the first integral (velocity) to detect motion. This is often all you need to know. It is sometimes irrelevant to know if you traveled exactly 10 or 20 meters, but it is relevant to know that you started moving at about 1 m/s and then stopped.
(you also have to be careful to compensate for the acceleration that you detect while rotating, but that's another topic)
I'm not following the forum enough to know what your purposes are,
but I would advise a correct, precise head position.
Small and correct movements of the head are critical for presence because that's how you perceive naturally.
And if you have that, you don't even need to have a stereoscopic display to correctly perceive depth (
http://cb.nowan.net/blog/2010/04/28/doe ... 3d-matter/)
We recently tried that at Laval Virtual. Some of the best French VR experts were on our booth and did not realize that we had used the Sony HMZ-T1 in mono.
They felt the 3d was very smooth and not giving any headache.
cheers!