Hi Steven, This is odd since the OpenGL2 mapper should have detected FBO support. I will have a look at it.
- aashish On Mon, Jun 29, 2015 at 6:06 PM, Hahn, Steven E. <[email protected]> wrote: > I am observing some odd results with volume rendering using ParaView > 4.3.1 and ParaView master on OS X machines with NVIDIA graphics cards > including a Geforce 650m in a macbook pro and a Quadro K5000 in a mac pro. > On the mac pro, changing between the NVIDIA web driver and OS X default > driver has no effect. > > 1) After loading a vtkImageData file and selecting the volume > representation and the GPU based volume rendering mode, the image > disappears. The other volume rendering modes show the image correctly. I > also tried building ParaView master with the OpenGL2 rendering backend and > in that case the GPU based volume rendering mode displays only some of the > surfaces (2-4, the exact number depends on the camera position) and not the > entire volume. > > 2) I also tried loading a small vtkStructuredGrid (attached) into > ParaView master built with the OpenGL2 rendering backend and get the > warning below. There are substantial artifacts that are not present when > the OpenGL rendering backend is used. These artifacts don’t appear when I > load the same file in ParaView 4.3.1 or ParaView master build with the > OpenGL rendering backend. > > Warning: In > ../VTK/Rendering/VolumeOpenGL2/vtkOpenGLProjectedTetrahedraMapper.cxx, line > 151 > > vtkOpenGLProjectedTetrahedraMapper (0x7fdc49d3a140): Missing FBO support. > The algorithm may produce visual artifacts. > > > I tried running glxinfo and under OpenGL extensions it does > list GL_ARB_framebuffer_object, GL_ARB_draw_buffers and > GL_ARB_texture_float. VTK, however, doesn’t appear to be detecting this. > > > Sincerely, > > Steven Hahn > > _______________________________________________ > 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 > > Search the list archives at: http://markmail.org/search/?q=ParaView > > Follow this link to subscribe/unsubscribe: > http://public.kitware.com/mailman/listinfo/paraview > > -- *| Aashish Chaudhary | Technical Leader | Kitware Inc. * *| http://www.kitware.com/company/team/chaudhary.html <http://www.kitware.com/company/team/chaudhary.html>*
_______________________________________________ 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 Search the list archives at: http://markmail.org/search/?q=ParaView Follow this link to subscribe/unsubscribe: http://public.kitware.com/mailman/listinfo/paraview
