Stefan Schreiber wrote:
David McGriffy wrote:
I got a GearVR recently and it does work better than Google
Cardboard. Much
of this is just comfort, I think, but I understand that it has its own
gyros, mostly because they are faster. 'Heresay' is that the Oculus Rift
samples at least 1000Hz.
Yes, but do you need this?
The Rift is scheduled for release on March 28, 2016, making it one of
the first consumer-targeted virtual reality headsets. It has a
resolution of 1080×1200 per eye, a 90 Hz refresh rate, and a wide
field of view.
https://en.wikipedia.org/wiki/Oculus_Rift
I see an issue if an assumed 125 Hz or 250 Hz sensor is not synced to
90 Hz, because this will lead to different "phases" brought into a
non-fractional pattern. The problem then is that the 90Hz impression
will be not be really smooth, in this case (A kind of 3:2 pulldown
effect, so to speak. Different time lengths in 90 uneven parts, old
story.)
You don't have to sync sensor and screen update speeds if you have a
very high sensor speed.
And if I think about a bit further:
The video frames (75 to 120 Hz refresh rate) should be built up
according "current" positional and view directional data.
The audio case is a bit different, IMO. Audio synthesis (VR/AR) has to
be aligned with the video data, but the "colour changes" introduced by
head orientation are very probably less time-sensitive. (s. available
studies I have cited.)
Does this make sense?
Stefan
If you are thinking wireless headphones, remember the latency that that
introduces. I find my everyday bluetooth headset, built for music, is
useless for VR because of latency.
You don't need (absolute) real-time capability to listen to a recording.
Tracking needs RT response.
Best,
Stefan
And if you headphones are going to be
wired, then running that extra USB might not be too bad.
David McGriffy
On Mon, Feb 1, 2016 at 12:49 PM, Bo-Erik Sandholm <bosses...@gmail.com>
wrote:
Apperently there exists a head tracking specialized version of the
bno055
called bno070 - but I cannot find a place to buy this.
you can get up to 250 samples / second from that version.
Matthias did not complain about the update rate with the DIY
headtracker
http://www.rcgroups.com/forums/showthread.php?t=1677559
http://electronicspurchasingstrategies.com/2014/03/06/hillcrest-bosch-sensortec-collaborate-sensor-hub-solution/
http://docsfiles.com/pdf_bno070.html
http://ae-bst.resource.bosch.com/media/_tech/media/product_flyer/Mobile-Hillcrest-Labs-Sensor-Hub-Product-Brief-BNO0701.pdf
https://www.eiseverywhere.com/file_uploads/5c881a2f6eaaa90ed3f3d30fb20852db_Newsflash_BNO077.pdf
maybe it is better to not think about that and try and use what I
have ?
It is easy to find videos about using the bno055 in different
projects but
i do not want videos... have not found links to the software used...
Better luck when google github bno055 :-)
https://www.reddit.com/r/virtualreality/comments/3faq11/why_we_need_to_move_to_ambisonic_sound_in_the/
http://vriscoming.com/daydream-vr/
Bo-Erik
2016-02-01 18:56 GMT+01:00 Marc Lavallee <m...@hacklava.net>:
On Mon, 01 Feb 2016 17:46:47 +0000
Stefan Schreiber <st...@mail.telepac.pt> wrote:
What is a 10 DOF motion sensor??? (Didn't you mean 9DOF?)
It's 9DOF + barometric pressure, so 9DOF is enough. For more info:
http://playground.arduino.cc/Main/WhatIsDegreesOfFreedom6DOF9DOF10DOF11DOF
--
Marc
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