[visionegg] Re: moving aperture

  • From: Andrew Straw <astraw@xxxxxxxxxxx>
  • To: visionegg@xxxxxxxxxxxxx
  • Date: Wed, 20 Sep 2006 11:39:39 -0700

Don't forget to set internal_format = gl.GL_RGBA when creating your
TextureStimulus instance.

-Andrew

adam naples wrote:

> I'm trying this right now, and my .png files are not being displayed 
> with transparency, even though I'm saving them with transparency. I'm 
> using the pygame.image.load to load them as surfaces and then 
> converting them to textures, is there some other approach i should be 
> using?
> thanks
> -an
>
> On Sep 20, 2006, at 2:25 PM, Andrew Straw wrote:
>
>> Hi Jim,
>>
>> I suggest making your aperture using a .png with an alpha channel.  Then
>> see the alpha_texture.py demo to show how to display this. Finally, if
>> you want to move the aperture, you'll have to adjust the position
>> parameter of your aperture-containing texture. Something like
>> mouseTarget.py should get you on the right track.
>>
>> Cheers!
>> Andrew
>>
>> Jim Magnuson wrote:
>>
>>> I'm brand new to vision egg, and getting stymied about how to do the
>>> following task.
>>>
>>> What I want to do is display an image or text in a viewport, but then
>>> hide all but a small aperture (e.g., an oval with gaussian edges),
>>> and then move the aperture around.
>>>
>>>  If anyone has advice or example code to share, I'd be grateful.
>>>
>>> Thanks,
>>>
>>> jim
>>>
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>>
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