**ShowPlay Reference Manual, Chapter 3 (ControlVariables): eye_flag**
===== Eye_flag -- Control Showplay's eyetracking features =====
Eye_flag is an integer variable that Showplay uses to control whether and how to collect eyetracking data.  The variable is used as a bit flag, in which each binary bit controls a different option. Combine different options by adding bit values.  If eye_flag is 0, all eyetracking features are turned off; this is the default setting.

The bit values (specified in [[jvs:cigal:manual:chapter1:numbers|octal]]) for eye_flag options are:

       1  - monitor eye position X/Y values sent from the eyetracker 
       2  - monitor pupil size X/Y values sent from the eyetracker 
       4  - 
    1000o - 

**See Also:**\\
[[jvs:cigal|CIGAL Home]], 
[[jvs:cigal:manual|CIGAL Manual]], 
[[jvs:cigal:showplay|ShowPlay Home]], 
[[jvs:cigal:showplay:manual|ShowPlay Manual]], 
[[jvs:cigal:showplay:manual:chapter3|InputParameters List]], 
[[jvs:cigal:showplay:manual:help|Manual Help]]

[[biac:experimentalcontrol:eyetrackcigal|Using the eyetracker with CIGAL]]