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[mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Hadrien
Thomas
Sent: Wednesday, August 12, 2009 7:33 AM
To: osg-users@lists.openscenegraph.org
Subject: Re: [osg-users] OSG and shaders
I've asked a friend what to do. He told me to look
I've asked a friend what to do. He told me to look in the sources, which I am
doing right now and might help me for every problem instead of coming here
whining about the lack of documentation (which I now understand thanks to you
Kim Bale). Beign a noob, I forgot OSG was opensource...
He told
carnibirdy wrote:
> Hello everybody!
>
> Afeter some research on the net, I gathered some clues, day after day and I
> managed to make the shader i had to... just in part.
>
> I have no more problem with shaders! My only concern is now Openscenegraph.
>
> I don't understand AT ALL who has the
Hi,
also see here:
http://mew.cx/osg_glsl_july2005.pdf
OpenSceneGraph Quick Start Guide
http://www.lulu.com/content/paperback-book/openscenegraph-quick-start-guide/767629
Mail archives
http://news.gmane.org/gmane.comp.graphics.openscenegraph.user
OpenGL Shading Language
http://www.amazon.com/O
Hi Hadrien,
The learning curve for the OSG is pretty steep, I think we can all
agree on that. However, if you have a good knowledge of graphics in
general or OpenGL in particular, the transition to the OSG is fairly
straightforward.
Documentation can be sparse in some areas, but one should rememb
Hello everybody!
Afeter some research on the net, I gathered some clues, day after day and I
managed to make the shader i had to... just in part.
I have no more problem with shaders! My only concern is now Openscenegraph.
I don't understand AT ALL who has the knowledge of this language??
The re
Hi,
carnibirdy wrote:
>
> For now, I'm still blocked with OSG.
> I want to map the same texture to the 6 faces of a cube.
>
> I made a Geometry called "cube" and 6 DrawElementsUInt called "face1/2/.../6".
>
> I don't know how to setTexCoords to each QUADS.
> I thought about making 6 Geometry s
I agree with Paul, the Orange book is a *must have* title if you're
learning shaders.
http://books.google.co.uk/books?id=kDXOXv_GeswC&dq=opengl+shader+language&printsec=frontcover&source=bn&hl=en&ei=E5Z6Svb-K5Cy-AbQ87lS&sa=X&oi=book_result&ct=result&resnum=5#v=onepage&q=opengl%20shader%20language&
Thank you for the book reference. I will think about purchasing it. I can
afford it but it's a big expense for me :-*
For now, I'm still blocked with OSG.
I want to map the same texture to the 6 faces of a cube.
I made a Geometry called "cube" and 6 DrawElementsUInt called "face1/2/.../6".
I
And it deserves saying, if you can get your hands on an OpenGL Orange
Book you'll be that many more steps ahead. I thought it was really good
at explaining things in depth while also being easily navigated to drill
in on target areas.
I had complex shaders up and running in a few days with th
Thank you very much, I was so desperate :\
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Well,
I'm doing an internship too.
At the beginning I didn't know osg at all, neither shaders.
There are still an extraordinary amount of things I ignore about OSG (my
advice: when you try to do or understand something, take a look at how it's
done in OpenGL).
Shaders aren't as hard to use as
Thank you for the links. I have already read them and found nothing useful at
this stage.
As every link I've read...
The shaders codes are given without the mains, the mains without the shaders,
the openscenegraph.org tutorials are with osgGL2 (which I can't work with), and
there is no other t
On 5/08/09 11:41 AM, Maxime BOUCHER wrote:
@btrall:
Where do you find this ShaderGen? I found it neither in the classlist nor the
osg examples.
It could be that it's not part of 2.8 but in trunk it's in:
src/osgUtil/ShaderGen.cpp
include/osgUtil/ShaderGen
examples/osgshadergen/osgshadergen.c
Hi,
@btrall:
Where do you find this ShaderGen? I found it neither in the classlist nor the
osg examples.
@carnibirdy:
Rewritting the lights effects and texture mapping in the shader is quite easy.
You can find implementation examples here (http://www.typhoonlabs.com/), in the
"OpenGL Shading L
Hadrien Thomas wrote on Tuesday, August 04, 2009 10:57 AM:
> Ok.
> It's going to be a lot of work for me I guess :P
>
> Thank you for your help!
Perhaps osgUtil::ShaderGenVisitor and the osgshadergen example can help
you out? They were designed to reproduce the fixed functionality
pipeline in sh
Ok.
It's going to be a lot of work for me I guess :P
Thank you for your help!
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If you add a shader to an object it removes all of the effects of
OpenGL's fixed pipeline rendering. As a result if you want any of that
fixed pipeline rendering back (such as lighting, texture mapping etc.)
you will have to write an equivalent implementation within the shader.
K.
2009/8/4 Hadri
Good afternoon,
It's me again ^^
I tried some available shaders and i'm afraid that i don't understand at all
how it works.
It blows away all the textures and the lighting. Am I supposed to put them in
the shaders?
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Thank you very much!
I think I copied an error... what a big mistake :P
That works! I can finally begin to see the effects of shaders! Fantastic! :P
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Hi Hadrien
0(3) : error C1008: undefined variable "glPosition"
0(3) : error C1008: undefined variable "glProjectionMatrix"
0(3) : error C1008: undefined variable "glModelViewMatrix"
0(3) : error C1008: undefined variable "glVertex"
GLSL functions all have the prefix gl_ not gl. i.e. glPosition sh
Hi,
I found this tutorial which was very convenient:
http://www.openscenegraph.org/documentation/NPSTutorials/osgGL2ShaderIntro.htm
But the problem was the path of my shader files.
Now I have solved that, it compiles but there is still a problem remaining:
Code:
VERTEX glCompileShader "" FAI
>
> Ps: I just noticed that i dont know what are: drawWidth and drawColor. But if
> it's not the main problem, can you tell me?
>
You're missing a vertex shader. Your program isn't linking.
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Good evening ^^
I tried to paste some code from a co-worker but it doesnt seem to work and I
dont know why:
Main.cpp:
Code:
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
#include
int main(int ac
Simon Hammett wrote:
> http://www.typhoonlabs.com/
>
> Download chapters 1 through 5 and ShaderDesigner.
>
> Very very handy.
>
> There's also the orange book: (though I've not read it myself)
>
> http://www.amazon.com/OpenGL-Shading-Language-Randi-Rost/dp/0321637631
>
>
That's exactly wha
Thank you very much. I'll visit your links this afternoon!
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http://www.typhoonlabs.com/
Download chapters 1 through 5 and ShaderDesigner.
Very very handy.
There's also the orange book: (though I've not read it myself)
http://www.amazon.com/OpenGL-Shading-Language-Randi-Rost/dp/0321637631
2009/8/3 Hadrien Thomas :
> Hi!
>
> I just registered to this for
Hello Hadrien,
You can find a basic introduction in the OSG Tutorials:
http://www.openscenegraph.org/projects/osg/wiki/Support/Tutorials
Another Tutorials about GLSL-Shaders can you find on the lighthouse website:
http://www.lighthouse3d.com/opengl/glsl/
And the Quickref-Doc of GLSL is very u
Hi!
I just registered to this forum. I hope I am not a kind of intruder or
something.
I am starting right now a 6 month internship.
I have to build a library of effects with GLSL and OSG.
The problem is that I'm not used to OSG (but I had some courses for
OpenInventor which has the same system
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