Another faster way is to use shaders.
Start with the first example in 10.GLSL.
++

Jack



Le mercredi 01 septembre 2010 à 03:23 -0700, Diego Azar a écrit :
> Hi IOhannes, 
> 
> Thanks for the quick response, I need to change some pixels gray
> values after an pix_data analisis. I might try to use a rectangle with
> a translateXYZ, or something like that.
> 
> Diego. 
> 
> --- On Wed, 9/1/10, IOhannes m zmoelnig <[email protected]> wrote:
>         From: IOhannes m zmoelnig <[email protected]>
>         Subject: Re: [PD] change pixel color value...
>         To: "Diego Azar" <[email protected]>
>         Cc: "PD List" <[email protected]>
>         Date: Wednesday, September 1, 2010, 8:22 AM
>         
>         On 2010-09-01 03:33, Diego Azar wrote:
>         > Hi list, 
>         > 
>         > Does anybody know of a Gem objets that let you change the
>         gray or color value of a certain pixel in the Gem window? I
>         mean, something like change de pixel x=310, y =200 to gray=0.5
>         >
>         
>         [pix_rectangle] could be used for that, if you are sure that
>         you really
>         want to modify the pixes (a faster way would be to place some
>         properly
>         sized geo on top of the texture, but of course this might not
>         be exactly
>         what you need)
>         
>         fgmkasdr
>         IOhannes
>         
>         
> 
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