Krishna,
I am not an expert on visualization but I know mayavi
(https://docs.enthought.com/mayavi/mayavi/) can read vtk and vtu. This
is more geared towards python users though. If you think that the
documentation is lacking, feel free to open a pull request ;-)
Best,
Bruno
On 3/16/20 12:14 PM, Krishnakumar Gopalakrishnan wrote:
Hi Bruno,
Thanks for this information.
I am genuinely curious to know about these other programs that are
capable of reading .vtk and .vtu files. Everyone says that these
files are so standard, and claim that there are a lot of tools that
can read them. I could not find really find any general purpose
visualisation software outside of VisIT and Paraview that reads these
files. There are also couple of medical simulation
visualizers/toolkits that again come out of kitware stables. For an
open-source framework like the VTK with a business -riendly BSD
license, it is rather surprising that no other company or university
has built a competing product.
/Some people also use vtk to transfer data between programs.
/
/
/
What could be examples of such work flow, especially in a 1D context?
For all practical purposes, 1D .vtu/.vtk files seem useless. At least
could we have a warning/note block of text in the write_vtu() and
write_vtk() pages of the documentation that 1D visualisation using
.vtk is a non-starter? I have seen many such notes calling for the
readers' attention. I spent nearly two days under the belief that a
1D simulation shoud just be a walk in the park for the two vtk-based
heavyweights.
Regards,
Krishna
On Mon, 16 Mar 2020 at 15:51, Bruno Turcksin <bruno.turck...@gmail.com
<mailto:bruno.turck...@gmail.com>> wrote:
Krishna,
VisIt and Paraview are just two of many visualization software
that can read .vtk and .vtu files. Some people also use vtk to
transfer data between programs. Why should we restrict the output
because two visualization tools don't support 1D?
Best,
Bruno
On Monday, March 16, 2020 at 11:37:57 AM UTC-4, Krishnakumar
Gopalakrishnan wrote:
Hi Praveen,
Thank you. That really helps. I shall definitely check it out
and report back. I just have standard Q1 linear elements in a
unit (0,1) domain, solving a standard 1D diffusion problem.
Are we all agreeing that sophisticated VisIT and Paraview
cannot produce simple 1D visualizations/animations? If so,
there must be anAssert() pre-condition check for the
DataOut::write_vtk() and DataOut::write_vtu() functions of the
library which return an exception with "dimension not
implemented" error.
Regards,
Krishna
On Mon, 16 Mar 2020 at 15:31, Praveen C
<prav...@tifrbng.res.in <mailto:prav...@tifrbng.res.in>> wrote:
I have a 1d example here
https://bitbucket.org/cpraveen/deal_ii/src/master/dg/1d_scalar_legendre/
The blank lines in the output file denote different
elements. It is not necessary to sort if you use gnuplot
to plot it. gnuplot makes one curve for the solution in
each element. If the FE space is continuous, you will get
a plot which is globally continuous.
Best
praveen
On 16-Mar-2020, at 8:50 PM, Krishnakumar Gopalakrishnan
<krish...@vt.edu <mailto:krish...@vt.edu>> wrote:
Hi Praveen,
Thanks for your reply. Yes, I had success with gnuplot,
but the following were the difficulties.
1. Weirdly, the x-axis co-ordinates of the mesh are not
sorted in a particular order (they appear rather
randomly, arranged in groups of 2 rows with blank
lines between them).
2. The time-animation is not easy to visualize.
Paraview has a nice animation player for such sets of
.vtu files.
Is there some trick to visualize time-series of 1D
spatial data?
Regards,
Krishna
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