hello, i don't understand everything on your mail.
with color = color * 0.1 , then every color component (R, G and B) will be 10 times smaller than the original texture color, so the images will be darker. color value are between 0 and 1, so you can try curve like this : color = pow(color,vec4(0.5)); i don't know exactly what curve to use for a good contrast / saturation, but you can have a look at pix_contrast source code... Cyrille olsen a écrit : > hep cyrille > thanks for this hint - though it's my first time using shader - i > tweaked around a bit with the example. i changed color saturation > towards muchocolore in the texture.frag file. although removing color to > get a black & white image i'm also loosing opacity f.e. with color = > color* 0.1; the image gets almost black. > where aside the green behind my ears can i find infos about how to > handle the shader? > thanks&salutis > olsen > > cyrille henry wrote: >> use shader! >> you'll have to make your own shader, but adjusting color saturation is >> quite easy. >> see gem documentation/10.glsl/01.simple_texture >> >> cyrille >> >> >> olsen a écrit : >>> hi >>> roman & me are working on an videoinstallation using gem - only an >>> additional [pix_contrast] in the gem chain hits the processing limit >>> of our computer - is there a way to adjust color saturation in the >>> gpu instead of the cpu in Gem? >>> thanks&greets >>> olsen >>> >>> >>> >>> >>> > _______________________________________________ Pd-list@iem.at mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list