I need to present the gaze position with an object (sphere for example) on Unity that should follow ey movement to be able to select other objects in Unity scene.
Any precise explanation of the metrics sent by the glasses ( gp3, gp, gd, gy, ac .. )? And how can I use them?
Have you tried using Tobii's Unity integration already? Using the native data of the glasses in any of your mentioned formats is probably problematic in real-time. If you were to read out the tracking data in real-time, e.g. from a text file or via MatLAB, performance would suffer significantly in comparison to just using Tobii's SDK. I've only used one of Tobii's screen-based trackers in the past and integrating it with Unity was pretty straightforward.
http://developer.tobiipro.com/unity/unity-getting-started.html
The SDK should contain Unity demo scenes to help you represent the eye-gaze data easily.
If this SDK does not work for you, I would contact Tobii support directly to ask about integrating the Pro Glasses 2 data into Unity.
All the best,
Sebastian
The problem with Tobii Glasses 2 is that it has no SDK to be integrated in Unity.
The SDK that tobii provides does not work with the wearable tobii glasses pro 2.
So i'm obliged to use the native data.
While using your tobii screen-based, have you encountred any problem about the data received?
Because I think that the data received from the glasses is wrong. For example , I'm 50cm away from the screen and the metric gp3 (gaze position 3D ) that I receive contain arbitrairy values different from the real value.
I did not have any issues with the received eye-gaze data, but as you pointed out, the screen-based trackers have a different SDK than the glasses. Also, the screen-based trackers share a frame of reference with the Unity application (i.e. the screen), from which you can use Camera.ScreenToWorldPoint to translate the eye gaze into a ray into your Unity application.
I'm trying to understand your setup - how do the Unity application and Tobii glasses align? How is the Unity application presented to the user? On a screen? In VR? In order for the eye gaze data to make sense, it would have to share a frame of reference with the Unity application.
All I could find about this specific Tobii SDK is the advice to contact Tobii Pro support and ask whether a C# wrapper exists for this SDK, so you can integrate it in Unity yourself.
In fact, the user must be in front of a screen. It can be the laptop's screen or any, which means that the code must work regardless of the screen size, or the position of the user relative to the screen ( we will use an optitrack system to determine the position of the user in the room).
So what we will do is to run the Unity scene on the screen and represent the gaze position with a Unity object ( sphere for example ) that should follow the eye gaze.
I posted a question on the tobii pro website. The response was " I have a question just to make sure. Since you have mentioned Glasses 2 and Unity, I assume that you are using Qualisys integration. Is that right? Because we do not have any Glass 2 SDK for Unity. "
I don't really know what is meant by Qualisys integration, whether it's the hardware or the software component. I'm still waiting for the answer.
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