AlphaBlend

1
Do you need to have a more complicated way to display a screen
with 'DrawDots' or could you just "Screen(window, 'Flip');"
Also whats the difference between AlphaBlend and BlendFunction?
Regards
Chris
2
Dear Sir

Hello. I am a graduate student at Ohio University USA. I am working on temporal perception experiments. I am new to the pyschophysics toolbox PTB 3 and I am facing some very frustrating problems. In my program I am using multiple screens called sequentially, as the control toggles between the command window of the Matlab version 2007b and the screen.

I am getting synchronization errors and the program is not able to enter the screen one it execution is over.

My system has windows vista with NVIDIA graphics display. Should I change the OS to XP or Linux and lower the Matlab version.

Kindly advise.

I"ll be highly obliged.

Sincerely

karan

3
I know March is probably the months of the Haiku, but
could you try to add a few more sentences to explain
the problem, even if it impairs the poetic beauty of
your message?

"type DotDemo", if your question is related to usage
of Screen('DrawDots').

best,
-mario

--- In psychtoolbox@yahoogroups.com, "chris_rosenfeld" <twiggy_inc@...> wrote:
>
> Do you need to have a more complicated way to display a screen
> with 'DrawDots' or could you just "Screen(window, 'Flip');"
> Also whats the difference between AlphaBlend and BlendFunction?
> Regards
> Chris
>