Brain Imaging & Analysis Center

usage: r_eyepos opflg eflag ltime Databuf Flag Timebuf

R_EYEPOS gets real-time eye-position values, typically from an external device via a communication port. Calls to R_EYEPOS will return eye data in the DATABUF variable. Depending on the status of FLAG, it will return either 2 or 4 16-bit data values to DATABUF.

The FLAG parameter specifies options when reading streaming eye position data input. The parameter is an integer bit-flag variable, in which each multiple binary values can be combined by addition. The meaning of the individual flag bits are as follows:

• 1 EYE_XYPOS
• 2 EYE_PUPIL
• 4 EYE_READ
• 8 EYE_DEBUG
• 16 EYE_SCREENSCALE
• 32 EYE_WAIT
• 64 EYE_PURGE
• 512 EYE_NOWAIT

The default value for EYE_FLAG is 519 (octal value 01007o, EYE_XYPOS|EYE_PUPIL|EYE_READ|EYE_NOWAIT).

Note: To record eye-tracker data you must first INITIALIZE the eye-tracker hardware and software connected to a different computer, and then also initialize CIGAL's eye-tracker connection to that computer (see Eye-Tracker).

See Also:
INITIALIZE, Eye-Tracker

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