[PD] [GEM]: GL Shader Language

cyrille henry cyrille.henry at la-kitchen.fr
Wed Jun 27 01:20:30 CEST 2007



Cypod a écrit :
> What books or webpages are out there for learning how to write glsl
> shaders, for use in 3D?
> 
> http://en.wikibooks.org/wiki/Programming:OpenGL

http://www.glprogramming.com/red/

> 
> Has anyone read this one OpenGL(R) Shading Language (2nd Edition)
> http://tinyurl.com/ysun6z
-> yes, this is my reference book.

> 
> 
> Are there any third party applications for writing glsl shaders that
> can be easially ported over to PD?
you don't need anything more than a text editor to write a shader.

cyrille
> 
> 
> 
> On 6/26/07, Cypod <cypod25 at gmail.com> wrote:
>> I am hoping to learn more about programming by using PD, but it would 
>> also
>> be nice to crank out some good looking shaders in a timely manner
>>
>>
>>
>>  On 6/25/07, Alexandre Quessy <listes at sourcelibre.com> wrote:
>> > HI Cyrille and others.
>> >
>> > I modified the abstraction to make opening the two files easier. It
>> > uses file/parentfolder from the PdMtlAbstractions. (try it !! It
>> > answers your question)
>> >
>> > For the C programming and such, I just meant that it is nice if we can
>> > tend to make Pd easier to use for people that are not that much used
>> > to advanced programming. A good documentation and a nice structure
>> > helps a lot...
>> >
>> > a
>> >
>> > 2007/6/23, cyrille henry < cyrille.henry at la-kitchen.fr>:
>> > >
>> > >
>> > > Alexandre Quessy a écrit :
>> > > > Eh Jack !
>> > > > Very nice examples, yes. Cyrille, do you think that one should
>> > > > understand C programming in order to use Pd? I don't.
>> > > i don't see your point here.
>> > > glsl programming is not very diferent from C. So, understanding C is
>> good for learning glsl.
>> > > but you don't nead glsl in order to use pd.
>> > > you just need glsl if you want to do very heavy pixel processing at
>> 50fps / 1024x768 without using any  CPU time by exemple.
>> > >
>> > >
>> > > > 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
>> > >
>> > > cut / paste the help file is (for me) easier to use, as i usually put
>> the shader in in the same directory as my patch, so i don't nead to 
>> provide
>> the full path for the shader. (and the patch could run on other computer
>> without changing all path).
>> > > is there a solution for an abstraction to know the directory of it's
>> parent patch?
>> > >
>> > > cyrille
>> > >
>> > > >
>> > > > 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?
>> > > >> >>>>>>>>
>> _______________________________________________
>> > > >> >>>>>>>> PD-list at iem.at mailing list
>> > > >> >>>>>>>> UNSUBSCRIBE and account-management ->
>> > > >> >>>>>>> http://lists.puredata.info/listinfo/pd-list
>> > > >> >>>>>>>>
>> > > >> >>>>>>>
>> > > >> >>>>>>>
>> _______________________________________________
>> > > >> >>>>>>> PD-list at iem.at mailing list
>> > > >> >>>>>>> UNSUBSCRIBE and account-management ->
>> > > >> >>>>>>> http://lists.puredata.info/listinfo/pd-list
>> > > >> >>>>>>>
>> > > >> >>>>>>>
>> > > >> >>>>>>
>> > > >> >>>>>>
>> > > >> >>>>>
>> > > >> >>>>>
>> _______________________________________________
>> > > >> >>>>> PD-list at iem.at mailing list
>> > > >> >>>>> UNSUBSCRIBE and account-management ->
>> > > >> >>>>> http://lists.puredata.info /listinfo/pd-list
>> > > >> >>>>>
>> > > >> >>>>
>> > > >> >>>>
>> > > >> >>>
>> > > >> >>> _______________________________________________
>> > > >> >>> PD-list at iem.at mailing list
>> > > >> >>> UNSUBSCRIBE and account-management ->
>> > > >> >>> http://lists.puredata.info/listinfo/pd-list
>> > > >> >>
>> > > >> >>
>> > > >> >>
>> > > >> >>
>> > > >>
>> ------------------------------------------------------------
>> ----------------
>> > > >>
>> > > >> >>
>> > > >> >>
>> > > >> >>
>> http://at.or.at/hans/
>> > > >> >>
>> > > >> >>
>> > > >> >>
>> > > >> >>
>> > > >> >
>> > > >> > _______________________________________________
>> > > >> > PD-list at iem.at mailing list
>> > > >> > UNSUBSCRIBE and account-management ->
>> > > >> > http://lists.puredata.info/listinfo/pd-list
>> > > >> >
>> > > >>
>> > > >>
>> > > >
>> > > >
>> > >
>> >
>> >
>> > --
>> > Alexandre Quessy
>> > http://alexandre.quessy.net
>> > http://www.puredata.info /Members/aalex
>> >
>> > _______________________________________________
>> > PD-list at iem.at mailing list
>> > UNSUBSCRIBE and account-management ->
>> http://lists.puredata.info/listinfo/pd-list
>> >
>>
>>
>>
>> -- 
>> B~
>> www.cypod.co.nr
> 
> 




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