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Old 11-04-2015, 02:09 AM
hzhao hzhao is offline
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Join Date: Sep 2012
Posts: 16
how to record data at fixed rate with viz.starttimer

HI,

I use viz.starttimer(0,1/30,viz.FOREVER) to run my object animation and record the motion data in function myAnimation. But the data is not recorded at 30Hz. instead it is recorded at about 40Hz and fluctuates.

viz.callback(viz.TIMER_EVENT,myAnimation)

viz.starttimer(0,1/30,viz.FOREVER)

I use Oculus DK2. If my virtual scene is complex and the computing burden is high, the data recording rate drops. So I set it at 1/30, and want to have a fixed recording rate. But it doesn't work.

Thanks.
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Old 11-04-2015, 06:55 AM
mape2k mape2k is offline
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Join Date: Mar 2013
Posts: 60
The script updates every frame: if the framerate drops below 30fps, the recording rate will also suffer.

You can decouple this by using the viz.director to start the data recording in a whole new thread, but it will be time asynchronous from the main thread so be careful.

Cheers!
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