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Detailed steps for obtaining eye movement data

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've learned about eye movement data from the SDK, but I don't know anything about getting these data. I hope you can help me. Thank you very much!

Here's some code for eye movement data:

public struct SingleEyeData 


                /** The bits containing all validity for this frame.*/

                public System.UInt64 eye_data_validata_bit_mask;

                /** The point in the eye from which the gaze ray originates in meter miles.(right-handed coordinate system)*/

                public Vector3 gaze_origin_mm;

                /** The normalized gaze direction of the eye in [0,1].(right-handed coordinate system)*/

                public Vector3 gaze_direction_normalized;

                /** The diameter of the pupil in meter miles*/

                public float pupil_diameter_mm;

                /** A value representing how open the eye is.*/

                public float eye_openness;

                /** The normalized position of a pupil in [0,1]*/

                public Vector2 pupil_position_in_sensor_area;

                public bool GetValidity(SingleEyeDataValidity validity)


                    return (eye_data_validata_bit_mask & (ulong)(1 << (int)validity)) > 0;






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