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/*
/osxptb/trunk/PsychSourceGL/Source/OSX/Eyelink/EyelinkEyeAvailable.c
PROJECTS: Eyelink
AUTHORS:
f.w.cornelissen@rug.nl fwc
E.Peters@ai.rug.nl emp
PLATFORMS: Currently only OS X
HISTORY:
12-05-2001 ep created it
22-05-2001 fwc added actual output values in synopsis.
22/06/06 fwc Adapted for OSX from early alpha version by emp.
TARGET LOCATION:
Eyelink.mexmac resides in:
EyelinkToolbox
*/
#include "PsychEyelink.h"
static char useString[] = "eyeused = Eyelink('EyeAvailable')";
static char synopsisString[]=
"returns 0 (LEFT_EYE), 1 (RIGHT_EYE) or 2 (BINOCULAR) "
"depending on what data is available "
"returns -1 if none available."
"ONLY VALID AFTER STARTSAMPLES EVENT READ";
static char seeAlsoString[] = "";
/*
#define LEFT_EYE 0 // index and ID of eyes
#define RIGHT_EYE 1
#define LEFTEYEI 0
#define RIGHTEYEI 1
#define LEFT 0
#define RIGHT 1
#define BINOCULAR 2 // data for both eyes available
*/
/*
ROUTINE: EYELINKeyeavailable
PURPOSE:
uses INT16 CALLTYPE eyelink_eye_available(void);
returns LEFT_EYE, RIGHT_EYE or BINOCULAR
depending on what data is available
returns -1 if none available
ONLY VALID AFTER STARTSAMPLES EVENT READ */
PsychError EyelinkEyeAvailable(void)
{
int eyeused;
//all sub functions should have these two lines
PsychPushHelp(useString, synopsisString, seeAlsoString);
if(PsychIsGiveHelp()){PsychGiveHelp();return(PsychError_none);};
//check to see if the user supplied superfluous arguments
PsychErrorExit(PsychCapNumInputArgs(0));
PsychErrorExit(PsychRequireNumInputArgs(0));
PsychErrorExit(PsychCapNumOutputArgs(1));
// Verify eyelink is up and running
EyelinkSystemIsConnected();
EyelinkSystemIsInitialized();
eyeused = eyelink_eye_available();
PsychCopyOutDoubleArg(1, TRUE, eyeused);
return(PsychError_none);
}
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