Got it, thanks a lot!
Colet Patrice
----- Mail original -----
De: "Cyrille Henry" ch@chnry.net À: "Patrice Colet" colet.patrice@free.fr Cc: "pd-list" pd-list@iem.at Envoyé: Lundi 8 Avril 2013 10:05:22 Objet: Re: [PD] flip image in glsl
hello,
when using rectangular texturing, coordinate goes from 0 to image pixel size. when using "rectangle 0" mode, pixel coordinate goes from 0 to 1. (sometimes 1 is for the power of 2 bigger than the image pixel size)
so, in rectangular mode, use pixetl_size - image coordinate to flip the image. and 1 - image coordinate in non rectangle mode.
Image can be fliped because the "fliped" flag is not used on the shader.
cheers c
Le 08/04/2013 09:24, Patrice Colet a écrit :
Hello,
how is it possible to flip upside down an image in glsl example 05.multitexture
I tried to implement this in fragment program:
http://stackoverflow.com/questions/9857089/flip-upside-down-vertex-shader-gl...
but it doesn't work. The only thing I can do is changing texture scale and position, but I couldn't do it with negative values like it would be done in pix_coordinates.
In fact when I use pix_multiimage before pix_texture, the image gets flipped, I don't know why...
Colet Patrice
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