marcus-nystrom / Titta

Python and PsychoPy interface to Tobii eye trackers using Tobii Pro SDK
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Setting up the viewing distance #18

Closed UBela closed 2 years ago

UBela commented 2 years ago

Hey, I haven't worked with psychopy before and wanted to change the viewing distance. However changing it to, e.g. mon.setDistance(70) did not change the distance during the calibration process. Am i missing something here? Thanks in advance, Béla

marcus-nystrom commented 2 years ago

Hi Béla,

Unfortunately the toolbox doesn't work that way right now. The head animation during setup is designed to put the head in the center of the head box, where the best data quality can be recorded. You can of course record at other distances as well, but data quality will generally be worse. May I ask why you choose to record at a non-optimal distance?

If you necessarily want to record at a distance of 70 cm, and want the circles to overlap at this distance during calibration setup, you can tweak the parameters in the EThead class (in helpers_tobii.py).

Best, Marcus

On Fri, Jan 28, 2022 at 1:47 PM Béla @.***> wrote:

Hey, I haven't worked with psychopy before and wanted to change the viewing distance. However changing it to, e.g. mon.setDistance(70) did not change the distance during the calibration process. Am i missing something here? Thanks in advance, Béla

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