Glaze stream very inaccurate (Tobii samples+own code), do not match Glaze Trace

This topic has 3 replies, 2 voices, and was last updated 5 years, 9 months ago by Alex [Tobii].

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01/12/2018 at 16:01 #9058
H.Scheidl
Participant
Running sample Interaction_Streams_101 from Github, Windows 10 with VS 2017, Tobii.Interaction.Model.dll is v4.0.30319 and Tobii Eye Tracker app is 2.13.4.7864
In the image you can see the X coordinates giving values way higher than my screen resolution. I was expecting at least the same precision as the Glaze Trace feature.
Probably the Glaze Feature uses another library than Tobii.Interaction, but the point is, how to get accurate results?
This is very frustrating, I’m considering returning the device 🙁
Sample link: Interaction_Streams_101

02/12/2018 at 13:40 #9059
Alex [Tobii]
Participant
Hi!
I believe the coordinates are scaled by DPI factor. So you just need to divide them by it.
03/01/2019 at 08:25 #9202
H.Scheidl
Participant
hi Alex!
You are right about, thanks for your reply! Would you have some tips on a reliable way to read that? I tried a few options, but nothing seems reliable.
03/01/2019 at 11:31 #9208
Alex [Tobii]
Participant
https://stackoverflow.com/questions/5977445/how-to-get-windows-display-settings
https://docs.microsoft.com/en-us/windows/desktop/api/shellscalingapi/nf-shellscalingapi-setprocessdpiawareness
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