On Mar 8, 2006, at 12:36 AM, chris clepper wrote:
Do you want to do something like add more red to an image?
pix_gain will multiply each channel (R G B or Y U V) by a
coefficient and pix_offset will add to the channel. You can also
try the colorRGB object to modulate the color value in hardware,
but the coefficients are limited to 0..1.
...GL_MODULATE is the standard texture mode in gem: I added
switchable options via an [env $1< sent to [pix_texture] to cvs last
week, so now you can also switch texture environment mode to GL_ADD,
GL_BLEND, or GL_COMBINE, too...there's also an updated help patch in
gem's cvs that shows this in action...
On 3/7/06, Alexandre Quessy listes@sourcelibre.com wrote: Hi,
Its been a little while since I am trying to _add_ a color to a
pix. Is there a way to do so ? The thing is that if I put a colored rectangle over a pix_textured reactangle, it kind of desaturate the picture.
...the benefit of the [env $1< is that all processing takes place on
the gpu (ie. no extra cpu cost) ;-)
I know such a thing is much easy in Gridflow, but I got to use Gem on OSX for this time again. If it is the only, though, I might try to compile Gridflow with its new export_pix and import_pix on OSX...
...yeh, time for us all to try that!
james