[How to get output from the eye-tracker faster than Update in Unity]

On 10/9/2019 at 7:56 PM, Daniel_Y said:

There is callback mode supported in 120 FPS now after check "Enable Eye Data Callback" as the figure shown below; And, then register a callback function by SRanipal_Eye_v2.WrapperRegisterEyeDataCallback(). Could refer to its usage in sample included in SDK.

 

 

I chosed according to this, but my version is SRanipal_GazeRaySample.cs.Using this i could get data in 90HZ,if i use SRanipal_GazeRaySample_v2.cs,i just got data in 50HZ.Why does it lead to such a structure?

Thanks in advance!

[Detailed steps for obtaining eye movement data]

'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;

                }

            }

@Corvus
 

 

 

[How to get values of eye position and head motion simultaneously?]

 Hello @Corvus,

How to get eye movement data through the SDK?I use the HTC Pro instrument. In the SDK, i found some eye movement data code, but i want to know how to extract it.thank you so much！

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;

                }

            }