[PD] [GEM]: GL Shader Language

[Alexandre Quessy]

Eh Jack !
Very nice examples, yes. Cyrille, do you think that one should
understand C programming in order to use Pd? I don't. Of course, its
low-level orientation makes it perfect for someone to learn lower
level stuff.

Anyways, I added an abstraction for shaders in the PdMtlAbstractions.
See https://devel.goto10.org/pdmtl/browser/trunk/pdmtl/gems

a


2007/6/19, jack at rybn.org <jack at rybn.org>:
> Yep, very interesting example !
> You can "boost" Gem with glsl object.
> Is there workshop in Paris about that Cyrille ?
> I think, that it would be interesting to do.
>
> Jack
>
> >
> >
> > Hans-Christoph Steiner a écrit :
> >>
> >> On Jun 17, 2007, at 6:58 AM, cyrille henry wrote:
> >>
> >>> hello,
> >>>
> >>>
> >>> Kyle Klipowicz a écrit :
> >>>> Ooop please send any elementary examples of these things.
> >>>
> >>>
> >>> i post a few very diferents shader and the pd patch to use them here :
> >>>
> >>> http://drpichon.free.fr/gem_glsl_ch_200070617.zip
> >>
> >> Wow, these are some nice examples, these should be included in the
> >> "examples" section of Pd-extended.
> >>
> >
> > well, i think i should clean up some code and check licence for the shader
> > i did not write.
> > where should i put them in order to include them in pd-extended?
> >
> > cyrille
> >
> >> .hc
> >>
> >>>
> >>>
> >>>> I got
> >>>> confused by the Gem docs (they don't explain OpenGL as thoroughly as
> >>>> the vanilla Pd-docs explain DSP).
> >>>
> >>> Gem doc aim is to explain gem specific stuf. but in order to use Gem,
> >>> you also need a good openGL book.
> >>> (you can find lot's of them)
> >>>
> >>> cyrille
> >>>
> >>>
> >>>>
> >>>> ~Kyle
> >>>>
> >>>> On 6/17/07, cyrille henry <cyrille.henry at la-kitchen.fr> wrote:
> >>>>> hello,
> >>>>>
> >>>>> Alexandre Quessy a écrit :
> >>>>>> Hi all !
> >>>>>> The Toon.vert and Toon.frag shaders don't seem to work quite well
> >>>>>> here. I only get some kind of darker or lighter grey depending on
> >>>>>> the
> >>>>>> value of the "Phong" variable I set it to have. I am using
> >>>>>> Pd-extended
> >>>>>> 0.39-2 test 5 on Ubuntu Linux Intel. Gem is 0.91-cvs compiled on Mar
> >>>>>> 16 2007. Should I generate something any better ?
> >>>>> this is exactly what the toon shader is aiming to do.
> >>>>> look at it's code to undersant why.
> >>>>>
> >>>>>>
> >>>>>> Anyone has an other GLSL shader to suggest to try it with ?
> >>>>>
> >>>>> yes, google has a lot.
> >>>>>
> >>>>> i have a few other exemple on my computer, tell me if you're looking
> >>>>> for some specific stuf.
> >>>>>
> >>>>>
> >>>>> cyrille
> >>>>>
> >>>>>
> >>>>>>
> >>>>>> Thanks !!
> >>>>>>
> >>>>>> a
> >>>>>>
> >>>>>> 2007/6/16, chris clepper <cgclepper at gmail.com>:
> >>>>>>> GEM is a bit easier to deal with for shaders since there is no need
> >>>>> to do
> >>>>>>> any specific wrapper.  Any ARB_ vertex or fragment shader and any
> >>>>>>> GLSL
> >>>>>>> shader you find on the web can work in GEM without modification.
> >>>>> In some
> >>>>>>> cases you might need to change something in the shader text to deal
> >>>>> with
> >>>>>>> rectangle vs 2D textures.
> >>>>>>>
> >>>>>>>
> >>>>>>> On 6/16/07, Cypod <cypod25 at gmail.com> wrote:
> >>>>>>>>
> >>>>>>>> On the cycling74 webpage there is an interesting article about
> >>>>> writing
> >>>>>>> shaders for jitter:
> >>>>>>>>   http://cycling74.com/story/2007/5/23/181113/507
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>>
> >>>>>>>> is there a similar function available for GEM? Has anyone had
> >>>>> experience
> >>>>>>> with doing this?
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> >>
> >> ----------------------------------------------------------------------------
> >>
> >>
> >>                                               http://at.or.at/hans/
> >>
> >>
> >>
> >>
> >
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-- 
Alexandre Quessy
http://alexandre.quessy.net
http://www.puredata.info/Members/aalex