[Paraview] Selecting volume rendering causes output to vanish

Jeff Becker jeffrey.c.becker at nasa.gov
Wed Jun 10 17:15:16 EDT 2015


On 06/10/2015 12:03 PM, David E DeMarle wrote:
> Probably the content isn't amenable to volume rendering. To be so, the 
> unstructured grid has to have volumetric cells in it (tets, voxels, 
> etc). If it just has polys or lines or points in it, they won't 
> appear. You'll have to resample of splat onto the data onto a 
> volumetric grid in that case.

That's it! I created an unstructured grid of points from a data file 
using VTK. I'll see about resampling to volumetric grid. Thanks.

-jeff
>
>
>
>
> David E DeMarle
> Kitware, Inc.
> R&D Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4909
>
> On Wed, Jun 10, 2015 at 2:58 PM, Aashish Chaudhary 
> <aashish.chaudhary at kitware.com <mailto:aashish.chaudhary at kitware.com>> 
> wrote:
>
>     No, I don't think so. It would be nice if you can try Burlen
>     suggestion to see if it works for built in datasets / sources.
>
>     - Aashish
>
>     On Wed, Jun 10, 2015 at 2:49 PM, Jeff Becker
>     <jeffrey.c.becker at nasa.gov <mailto:jeffrey.c.becker at nasa.gov>> wrote:
>
>         On 06/10/2015 11:46 AM, Burlen Loring wrote:
>
>             Hmm. If Bunyk ray cast doesn't work some thing strange is
>             going on as that is a software(non gpu) algorithm and
>             should always work.
>
>             Can you get anything to show up using a small test data?
>             For example create a wavelet source and apply a threshold
>             (use default values) to convert to unstructured data. If
>             that works maybe something with your input data, or size
>             of it.
>
>
>         It's a 500 by 500 by 500 grid of floats - is that too big?
>
>
>             On 06/10/2015 11:27 AM, Jeff Becker wrote:
>
>                 On 06/10/2015 11:06 AM, Burlen Loring wrote:
>
>                     2 things to try: set the remote render threshold
>                     to zero, and if that doesn't get it to show up,
>                     change the mapper to Bunyk ray cast.  One of those
>                     usually works depending on what the cause of the
>                     issue is.
>
>
>                 I have both of those set - no luck. BTW, this is
>                 ParaView 4.3.1 on an NVIDIA backend. glxinfo shows:
>
>                 $ glxinfo | head -30
>                 name of display: :0.0
>                 display: :0  screen: 0
>                 direct rendering: Yes
>                 server glx vendor string: NVIDIA Corporation
>                 server glx version string: 1.4
>                 server glx extensions:
>                     GLX_EXT_visual_info, GLX_EXT_visual_rating,
>                 GLX_SGIX_fbconfig,
>                     GLX_SGIX_pbuffer, GLX_SGI_video_sync,
>                 GLX_SGI_swap_control,
>                     GLX_EXT_swap_control, GLX_EXT_swap_control_tear,
>                     GLX_EXT_texture_from_pixmap, GLX_EXT_buffer_age,
>                 GLX_ARB_create_context,
>                     GLX_ARB_create_context_profile,
>                 GLX_EXT_create_context_es_profile,
>                     GLX_EXT_create_context_es2_profile,
>                 GLX_ARB_create_context_robustness,
>                     GLX_NV_delay_before_swap, GLX_EXT_stereo_tree,
>                 GLX_ARB_multisample,
>                     GLX_NV_float_buffer, GLX_ARB_fbconfig_float,
>                 GLX_EXT_framebuffer_sRGB,
>                     GLX_NV_multisample_coverage
>                 client glx vendor string: NVIDIA Corporation
>                 client glx version string: 1.4
>                 client glx extensions:
>                     GLX_ARB_get_proc_address, GLX_ARB_multisample,
>                 GLX_EXT_visual_info,
>                     GLX_EXT_visual_rating, GLX_EXT_import_context,
>                 GLX_SGI_video_sync,
>                     GLX_NV_swap_group, GLX_NV_video_out,
>                 GLX_SGIX_fbconfig, GLX_SGIX_pbuffer,
>                     GLX_SGI_swap_control, GLX_EXT_swap_control,
>                 GLX_EXT_swap_control_tear,
>                     GLX_EXT_buffer_age, GLX_ARB_create_context,
>                     GLX_ARB_create_context_profile, GLX_NV_float_buffer,
>                     GLX_ARB_fbconfig_float, GLX_EXT_fbconfig_packed_float,
>                     GLX_EXT_texture_from_pixmap, GLX_EXT_framebuffer_sRGB,
>                     GLX_NV_present_video, GLX_NV_copy_image,
>                 GLX_NV_multisample_coverage,
>                     GLX_NV_video_capture,
>                 GLX_EXT_create_context_es_profile,
>                     GLX_EXT_create_context_es2_profile,
>                 GLX_ARB_create_context_robustness,
>                     GLX_NV_delay_before_swap, GLX_EXT_stereo_tree
>
>
>                     On 06/10/2015 11:00 AM, Jeff Becker wrote:
>
>                         Hi. I have an unstructured grid file that
>                         opens and displays in Surface Rendering mode.
>                         If I switch to Volume Rendering, I don't see
>                         any output. Any ideas?
>
>                         Thanks.
>
>                         -jeff
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>     -- 
>     /| Aashish Chaudhary
>     | Technical Leader
>     | Kitware Inc.
>     /
>     /| http://www.kitware.com/company/team/chaudhary.html/
>
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