Re: Custom shaders

Bill Lorensen <[email protected]> Mon, 15 Apr 2019 18:52:21 -0700
Newsgroups gmane.comp.lib.vtk.user
Message-ID <CADZJ4hMa9auNPdHa6qWKCOcktHMrGt-tJpc1paE=qBgucnvbxw@mail.gmail.com>
Would you mind posting your question to https://discourse.vtk.org?
Community support for VTK has transitioned to that forum, and you are
more likely to get an answer there.

That said, the variables defined depend on which shader you are starting with.

For example, if you are overriding btkOpelGLPolyDataMapper then search
the source for SetUniform.

Also, the VTKExampleProject has a number of custom shaders...

https://lorensen.github.io/VTKExamples/site/Cxx/Shaders/BozoShader/
https://lorensen.github.io/VTKExamples/site/Cxx/Shaders/ColorByNormal
https://lorensen.github.io/VTKExamples/site/Cxx/Shaders/CubeMap
https://lorensen.github.io/VTKExamples/site/Cxx/Shaders/MarbleShader/
https://lorensen.github.io/VTKExamples/site/Cxx/Shaders/SpatterShader
https://lorensen.github.io/VTKExamples/site/Cxx/Shaders/SphereMap

On Mon, Apr 15, 2019 at 6:38 PM graphicsmonkey <[email protected]> wrote:
>
> Okay so looking through the Vtk code a bit i see that that shaders are
> generated via the vtkShaderProgram::Substitute command. Is there some
> documentation for this or do we have to go through the source code to work
> out what's going on?
>
>
>
>
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