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

[Utkarsh Ayachit]

You are on the right track. And indeed use vtkShaderProgram2 (similar
to LIC) and not the XMLShaders.

Utkarsh

On Thu, Oct 27, 2011 at 4:44 PM, Sohail Shafii <sohailshafii at yahoo.com> wrote:
> 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
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at:
> http://paraview.org/Wiki/ParaView
>
> Follow this link to subscribe/unsubscribe:
> http://www.paraview.org/mailman/listinfo/paraview
>
>
>