[vtkusers] vtkGPUVolumeRayCastMapper (OpenGL2) - Mask Input update

[Sankhesh Jhaveri]

Seems like you've exposed a bug. Mind creating a merge request
<https://gitlab.kitware.com/vtk/vtk/merge_requests> to VTK. You can tag me
on the MR for review.

Thanks,
Sankhesh

On Wed, Nov 30, 2016 at 1:26 PM meow_fiz <meow at mat.uni.torun.pl> wrote:

I've downloaded latest VTK from GIT (git clone
https://gitlab.kitware.com/vtk/vtk.git VTK). I guess it's the latest. But
the problem remains.

calling MaskInputData->Modified();  does not do any update to volume Mask

My temp solution until I find the right one:

(temporarily i've edited vtkOpenGLGPUVolumeRayCastMapper.cxx file -
GPURender( ... ) by forcing to call LoadMask when mask was modified:

if (this->Impl->NeedToInitializeResources ||
      (input->GetMTime() > this->Impl->InputUpdateTime.GetMTime()))
  {
    volumeModified = true;
    input->GetDimensions(this->Impl->Dimensions);

    // Update bounds, data, and geometry
    this->Impl->ComputeBounds(input);
    this->Impl->LoadVolume(ren, input, volumeProperty,
                           scalars, independentComponents);
    this->Impl->ComputeCellToPointMatrix();
    this->Impl->LoadMask(ren, input, this->MaskInput,
                         this->Impl->Extents, vol);
  }
  else
  {
       ///---------------------changed lines

          if (MaskInput->GetMTime() >Impl->ShaderBuildTime.GetMTime())
          this->Impl->LoadMask(ren, input, this->MaskInput,
                  this->Impl->Extents, vol);
        //-------------------- end of changed lines

    this->Impl->UpdateVolume(volumeProperty);
  }


Regards,
Michal




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Sankhesh Jhaveri *Sr. Research & Development Engineer* | Kitware
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