[GEM-dev] Re: GEM shader usage

[Tebjan Halm]

james tittle schrieb:

> hi tebjan,
>
> On Oct 18, 2005, at 2:55 PM, Tebjan Halm wrote:
>
>> i know shaders only from directX hlsl like they are implemented in  
>> vvvv. there you edit the shader by rightclick on a shader node in a
>> way like james want to have it.
>
>
> ...yeh, but instead of a rightclick on the node, I was thinking of  
> sending a [edit< message to the object (keeping with "the pd way"),  
> and that would open a text widget window, perhaps even on the canvas  
> like ben's [entry]...speaking of which, I checked that out briefly,  
> and it seems pretty nice, but I couldn't get it to print any output  
> on bang...time to look at the code...

>
>> the shader code itself contains ALL, that means paramters,  
>> vertexshaders, pixelshaders and
>> the way how they should compiled together.
>
>
> ...snip...
>
>> that means everything is in one textfile and you just need one  
>> object to load and/or edit the shader code, simple and clear.
>
>
> ...that spec looks very similar to CgFX project files, but I don't  
> know of something similar yet for glsl:  perhaps we could quickly put  
> something together with XML and start a standard with GEM/GLSL?  No  
> time atm, sadly...otoh, a pd patch with the several shader objects,  
> presets, and such would also be similar, although not human readable  
> in the least bit...

best way at all would be to make objects for the shader functions ! 
graphical shader programming, sheer madness ! ;)

>> nice greets from the meso office ;)
>
>
> ...meso and vvvv!?!  Whatcha doin' slum-ing around here?  ;-) 

i'm just an intern at meso, i havn't done that much on vvvv, i coded 
some nodes for math with complex numbers,
intersection nodes (quad/line, ray/mesh), midi clock and midi time code, 
and i added a time filter to the mainloop.

but pd was my first contact with graphical programming and i loved it 
(and still do). was spending many days
and nights with pd programming. first just audio, but soon i learned to 
use gem, that was perfect for my researches
in number theory, to display functions or searching patterns in prime 
number related questions. but i had often
performance problems and so a friend told me about vvvv and that they 
have spreads (lists, arrays) and every
node can handle that spreads and that the gui is more user friendly. so 
i tried it out and was really impressed.
... at the end i'm landed here. but for audio pd is still unreachable.

> Seriously, I've always admired the screenshots and specs of vvvv, but  
> never have had a machine to play around with it  :-( ...I'm strictly  
> ppc/osx, tho I guess next year even that'll change....  'twould be  
> nice if ya'll moved to opengl and went more cross platform :-)

oh yes, thats always a hot discussion, atm it seems that it will be 
rewritten in c# for all platforms, but no date is set, minimum 2-3 years.
vvvv is framerate based (every node has to have finite state at each 
frame) not event based like pd, so a [t a b a a b] node is not necessary 
because
everything happens in the same time, much better to debug ... but try it 
yourself if you can ...

>
> l8r,
> james
>
cheers