[visionegg] Re: blinking stimulus objects
- From: Andrew Straw <astraw@xxxxxxxxxxx>
- To: visionegg@xxxxxxxxxxxxx
- Date: Tue, 22 Sep 2009 10:00:14 -0700
bgoll001@xxxxxxxxxxxxxxx wrote:
> Hi,
>
> Is there a way to make shapes (i.e. FilledCircle) blink? Something like a
> sleep function that can temporarily stop a stimulus from displaying and takes
> a time value as an argument?
>
Hi Benny,
I've modified the color_grating.py demo to do something like what you're
asking for. See attached.
-Andrew
--
Andrew D. Straw, Ph.D.
California Institute of Technology
http://www.its.caltech.edu/~astraw/
diff --git a/demo/color_grating.py b/demo/color_grating.py
index 4c22a07..9ee561b 100755
--- a/demo/color_grating.py
+++ b/demo/color_grating.py
@@ -35,15 +35,14 @@ mask = Mask2D(function='circle', # also supports 'circle'
stimulus = SinGrating2D(color1 = (0.5, 0.25, 0.5), # RGB (alpha
ignored if given)
color2 = (1.0, 0.5, 0.1), # RGB (alpha
ignored if given)
- contrast = 0.2,
- pedestal = 0.1,
+ contrast = 1000.0, # flip completely from one
color to the other
mask = mask, # optional
position = ( screen.size[0]/2.0,
screen.size[1]/2.0 ),
anchor = 'center',
size = ( 300.0 , 300.0 ),
- spatial_freq = 20.0 / screen.size[0], # units of
cycles/pixel
+ spatial_freq = 0.0, # a solid color
temporal_freq_hz = 1.0,
- orientation = 270.0 )
+ )
def pedestal_func(t):
# Calculate pedestal over time. (Pedestal range [0.1,0.9] and
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