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Sebbi
Up and Coming
March 29, 2013

Magnetic yaw correction

So I downloaded the SDK and looked over what you guys are doing in regards to sensor fusion. It looks really basic (having seen what several multicopter projects are doing to calculate orientation) and the magnetometer doesn't get used at all.

Now I don't have a Rift yet, but I imagine that drifts in the yaw axis and should be visible after some time. Any plans to use the magnetometer or are you open to suggestions? ;-)

P.S.: If EnableGravity is set to false, there doesn't seem to be any normalisation of Q.

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    Jonnypspeed
    New Participant
    April 1, 2013
    Hi, so do you think using the hydra method is worth the setup? I havent bought mine yet but reading online I see it has good way of working with the rift. What other problems do you forsee you need to over come to get a good working setup? I am curious as there seems to be a few different methods but its all so patchy. What is the best setup out there so far? I just don't know.. :)
    Krisper
    Up and Coming
    April 1, 2013
    I don't use the Hydra a lot at the moment, but if you get one cheap I think it would be worth it. Lots of people are looking at integrating it with games for the Rift so I think there will be a lot more use for it in the near future.
    msat
    Up and Coming
    April 1, 2013
    "bteitler" wrote:
    From the Hydra support page:

    Q: Will the magnetic field of the Razer Hydra affect objects in its vicinity?
    A: The Razer Hydra uses a magnetic field which is 20 times weaker than the Earth's natural magnetic field, allowing it to operate without adversely affecting objects in its surrounding, such as credit cards, hard disk drives and speakers.

    I can't imagine that working in my apartment if it is that much weaker than Earth's field, especially if I wanted to move it around during play. Does it require a lot of calibration? I can see just rotating the base during play being a problem potentially.



    The Hydra uses coils to sense pulsed-DC magnetic fields, so it's pretty immune to any static local fields. Also, since the fields that emanate from the Hydra's base are so weak, you shouldn't have to worry about them coupling to ferrous materials in your building - only objects close to the controller. However, some people have reported problems when they were used close to certain monitors, which I assume was due to switching power supplies, so stay away from devices with noisy power supplies.
    bteitler
    Up and Coming
    April 7, 2013
    Hmm. Seem worth buying to test out at least. Thanks for the explanation.
    Jonnypspeed
    New Participant
    April 9, 2013
    I agree.
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