[Paraview] Linking error when trying to use vtkGLSL/vtkXMLShader

[Sohail Shafii]

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 <utkarsh.ayachit at kitware.com>
To: Sohail Shafii <sohailshafii at yahoo.com>
Cc: "paraview at paraview.org" <paraview at paraview.org>
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 <sohailshafii at yahoo.com> 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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