Thanks. That seems to do the trick. The only other issue is the rendering
context. I've used the line integral convolution/lic filters as an example,
and it seems like I need a "SetContext" function, which is passed a pointer to
an (new) allocated vtkRenderWindow object. For reference, I am looking at
vtkImageDataLIC2D.cxx.
I will then need to downcast this object to a vtkOpenGLRenderWindow and pass it
to vtkShaderProgram2, which requires a proper context...well I've done all of
that, and so far I've noticed that a new (small, blacked out) window with the
title "Visualization Toolkit" pops up when I start my filter. Now I have to do
something with this fragment shader (which currently does nothing).
Am I on the right track here? Or I am issuing an improper context?
Sohail
________________________________
From: Utkarsh Ayachit <[email protected]>
To: Sohail Shafii <[email protected]>
Cc: "[email protected]" <[email protected]>
Sent: Wednesday, October 26, 2011 8:43 AM
Subject: Re: [Paraview] Linking error when trying to use vtkGLSL/vtkXMLShader
Classes in graphics cannot depend on classes in rendering. You can move your
filter to hybrid.
Utkarsh
On Oct 26, 2011, at 12:11 AM, Sohail Shafii <[email protected]> wrote:
Hi,
>
>
>I am currently trying to do some shader operations in a standard C++ filter.
>This filter (inherits from vtkMultiBlockDataSetAlgorithm, resides in
>VTK/Graphics) will be used to voxelize a polygonal object (basically the
>result of the contour filter) and write the results to a 3D texture.
>
>
>I tried to do the following:
>vtkXMLShader *xmlShader = vtkXMLShader::New();
> vtkGLSLShader *glslShader = vtkGLSLShader::New();
>
>
>Which results in:
>Undefined symbols for architecture x86_64:
> "vtkXMLShader::New()", referenced from:
> vtkRepulsiveForceFieldGenerator::RequestData(vtkInformation*,
>vtkInformationVector**, vtkInformationVector*)in
>vtkRepulsiveForceFieldGenerator.cxx.o
> "vtkGLSLShader::New()", referenced from:
> vtkRepulsiveForceFieldGenerator::RequestData(vtkInformation*,
>vtkInformationVector**, vtkInformationVector*)in
>vtkRepulsiveForceFieldGenerator.cxx.o
>ld: symbol(s) not found for architecture x86_64
>collect2: ld returned 1 exit status
>
>
>I'm going to guess that standard filters can't use code like this, and that my
>filter should reside inside of the VTK/Rendering folder and follow the
>examples in that folder.
>
>
>Thanks,
>Sohail
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