Brain Imaging & Analysis Center

default -1 0 0 0 0 0 0 'xx' 08e8e8eh
 usage: eyecalib flag nxpts nypts pctX pctY nbox boxwid imagefile color
  defaults:       -1    5     4    95   95   5     40      -     08e8e8eh

This will calibrate eye position on the screen using a matrix of NXPTS x NYPTS locations (e.g. 4×4). The subject should simply look at the box displayed in successive locations. If you don't want to calibrate the whole screen, you can use pctX and pctY to indicate what fraction of the screen you want to use (default is 100% x 100%).

FLAG options:
    0 - normal mode
1 - scramble the order of display positions
2 - don't preshow start location
4 - don't erase locations
8 - recalculate matrix from previous eyecalib file
16 - don't display eyepos plot
32 - save eye calibration raw data in text file
64 - no delay between locations
   128 - save calib tables in eyecalib file
   256 - don't create eyecalib file

If IMAGEFILE is an image file name, that image will be displayed instead of
drawing a box.