Screen(‘DrawArc’)
Psychtoolbox>Screen.{mex*} subfunction
Screen(‘DrawArc’,windowPtr,[color],[rect],startAngle,arcAngle)
Draw an arc inscribed within the rect. ‘color’ is the clut index (scalar or [r g
b] triplet) that you want to poke into each pixel; default produces black with
the standard CLUT for this window’s pixelSize. Default ‘rect’ is entire window.
Angles are measured clockwise from vertical.