Follow the instructions in the readme file in your PDK to install the drivers and platform Runtime. After that you can simply use the Stream Engine API that is included in the PDK package. The package also includes example code to make it easy to get going with writing applications for the eye tracker.
Easy migration of applications from 4C to 4L
Applications developed for the 4C eye tracker model using the Tobii Stream Engine can be used with the 4L without the need for the Tobii Core Software. Replacing the Tobii Core Software with a customized version of the platform software provides a slimmer and cleaner installation procedure with only the necessary parts included. Since the 4C and the 4L use the same APIs in the Tobii Stream Engine, it is easy to migrate applications from the 4C to the 4L.
Licensing
When developing software for the 4L with the PDK, the development rights are governed by a Software Development License Agreement with Tobii. The eye tracking capabilities, also known as data streams, are separately licensed from Tobii (please see below for additional information).
Tobii Eye Tracker Data Streams
Different eye trackers from Tobii can have some differences in available data streams but this is the typical available data streams
| Data stream package | Data stream |
| Core Data Streams | Combined (left & right eye) gaze point, filtered for interaction |
| User presence | |
| Gaze origin | |
| Head position (6DoF) | |
| User position guide | |
| Advanced data* | Left and right eye separate unfiltered gaze point |
| Left and right eye separate unfiltered gaze origin | |
| Left and right eye separate unfiltered pupil diameter | |
| Configuration data* | Screen calibration and display setup |
*these data streams require a separate license key
Calibration of the eye tracker
The PDK package comes with a basic calibration application.
If you have the license for Configuration and Calibration data (see above) you can build your own calibration application if you have a need customization of the calibration. For details how go create your own calibration follow the instructions here: