How can I read the data of the 3D mouse though the USB port?

[marqueras]

Hello all,
I

[ngomes]

Hi marqueras,

There's some information on that in the "Developer's Forum". Check the "HID" and "Raw Input" stickies.

I've also moved this topic in (t)here.

[marqueras]

Hi ngomes,

I have seen the information that you told me, but the link doesn

[ngomes]

Hi marqueras,[quote]but the link doesn

[dr.ridu]

hi,

as i mentioned in another thread i've tried the DInputPoll-Example and got it working. But the values are jiggering (like doubling for one frame) from time to time. That makes it impossible to use the Navigator. Anybody heard of this problem ? I Tried the search "values jigger" but (as i supposed) found nothing....

Sorry for using this thread but i found it fitting somehow....

thx

[jwick]

Make sure you don't poll faster than the device can send new data. I'd stay under 60Hz, or even 30Hz to make sure you stay away from a Nyquist issue.

[ngomes]

Hi dr.ridu,

But the values are jiggering (like doubling for one frame) from time to time. That makes it impossible to use the Navigator. Anybody heard of this problem ?

Are you sampling (polling) the data really fast in your test program? Try to reduce the sampling rate (say: add a "sleep" of 65 ms) and let us know what happens.

[dr.ridu]

I'm tickling the poll during the renderloop. So its maximum 60Hz. Is that really too fast ? I can't use gettickcount for clamping the framerate because I'm already using it elsewhere....

[jwick]

Every other frame, just reuse the data from the last time.

[dr.ridu]

yeaah,

that's what I'm doing now and its much better. But the jiggering is just less and not away.... It should be ok for testcases. Not really for a serious application. I understand that not using the driver gets me to such things.
But using DX and needing 4-5 days just for getting this... hmmmm...