# _________________________________ SQUARE STIMULUS ________________________________ 
# 
# The model tries to reproduce Ewert's data on presentation of Squares  
# from 2 to 32 visual degrees.

# All stimuli values should multiplied by 4 in accordance to distance between matrix elements
set scale 4
set dx [expr 16*$scale]   ;# Size, 2 4 8 16 32 
set dy [expr 16*$scale]   ;# Size, 2 4 8 16 32 
set vx [expr 7.6*$scale]  ;# Speed, number of squares per second, 7.6 deg/sec.

nsl create block_stim stim -layer RetinaModel.retina.visin.in \
	-spec_type NSL_CENTER -xc [expr -$dx/2] -yc 0 -dx $dx -dy $dy -vx $vx