[vtk-developers] OpenGL2 : VBO update missing for mapper2d

[Ken Martin]

Yes, topic



https://gitlab.kitware.com/vtk/vtk/merge_requests/607



has a fix for it. I just have been too chicken to try merging that patch.
But the fix you need is in the diffs.



Thanks

Ken



Ken Martin PhD

Chairman & CFO

Kitware Inc.

28 Corporate Drive

Clifton Park NY 12065

ken.martin at kitware.com

919 869-8871 (w)





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*From:* vtk-developers [mailto:vtk-developers-bounces at vtk.org] *On Behalf
Of *Xabi Riobe
*Sent:* Wednesday, October 7, 2015 5:50 AM
*To:* VTK Developers
*Subject:* [vtk-developers] OpenGL2 : VBO update missing for mapper2d



Hi,



There is a missing update of the VBO in vtkOpenGLPolyDataMapper2D when we
use TransformCoordinate and the viewport changes.



In the attached example, a plane is rendered to cover the full window, but
if you resize the window, the plane does not update.



Maybe in vtkOpenGLPolyDataMapper2D::RenderOverlay, we should had a test on
the viewport MTime when updating the VBO? It works if i force to pass this
condition and update:



  if (this->VBOUpdateTime < this->GetMTime() ||

      this->VBOUpdateTime < actor->GetMTime() ||

      this->VBOUpdateTime < input->GetMTime() )

    {

    this->UpdateVBO(actor, viewport);

    this->VBOUpdateTime.Modified();

    }
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