[Paraview] Selecting volume rendering causes output to vanish
Burlen Loring
burlen.loring at gmail.com
Wed Jun 10 15:22:34 EDT 2015
500^3 should not be an issue. Still worth seeing if you can get the test
data from wavelet source to display as a sanity check. Another thing
that occasionally occurs, if the there is one or two extremely large
outlying values in your dataset (say from writing random unitialized
memory), the default transfer function makes the dataset invisible.
Would be worth checking the range of your data and experimenting with
transfer function as well.
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.
>
>
>
>
> 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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