[PD] GEM: multitexturing in GEM
cgclepper at gmail.com
Thu Jul 12 21:35:25 CEST 2007
Great! Which platform and hardware are you testing on? I should have
mentioned that I've only tested on OSX/Nvidia here.
On 7/12/07, cyrille henry <cyrille.henry at la-kitchen.fr> wrote:
> it works here.
> thanks a lot.
> chris clepper a écrit :
> > CVS is updated. Hopefully this won't break anyone's compiles.
> > The attached files are a test patch and the shaders. I will be out of
> > town for a few days and not able to work on this again until next
> > week.
> > On 7/12/07, chris clepper <cgclepper at gmail.com> wrote:
> >> I have multitexturing working with GLSL. While I upload the changes
> >> to CVS I can explain how it works.
> >> GLSL shaders cannot directly talk to hardware like ARB ones can. The
> >> application side code has to tell the shader which hardware texture
> >> unit to use. Obviously when I compile GEM there is no way in hell to
> >> know what the shader variables are going to be named, so another
> >> method to tell the shader which unit to use needs to be in place.
> >> One solution is to hardcode the names of the sampler variables, but
> >> that is kind of a hack. The one I put in place uses a message to the
> >> glsl_program object with the name of the sampler and the texture unit
> >> to use.
> >> How to use:
> >> 1) create gemwin and turn on rendering
> >> 2) load shader
> >> 3) send a [mySamplerName $1( message to glsl_program
> >> 4) load two movies or images
> >> 5) set one of the pix_texture units to upload to the same texture unit
> >> you told the shader to use with a [texunit $1( message
> >> This change should be in CVS soon. I will post an example patch in a
> >> bit.
More information about the Pd-list