[Paraview] Paraview 5.1 Parallel & Delaunay

[Joachim Pouderoux]

Stephane,

Regarding Delaunay2D, by definition if you only provide points it will
always generate a mesh that have the shape of the convex hull of this point
set.
If you want to keep a hole you will have to define a clock-wise ordered
polygon (not polyline) with points that defines the hole and provide it in
input of the algorithm. In this case Constrained Delaunay trianglation
<https://en.wikipedia.org/wiki/Constrained_Delaunay_triangulation> will be
computed - you might have to provide a polygon for the external boundary
(ie. the convex hull boundary for instance) defined in counter-clockwise
order in input too.

Best,

*Joachim Pouderoux*, PhD

*Technical Expert - Scientific Computing Team*
*Kitware SAS <http://www.kitware.fr>*


2016-07-21 8:25 GMT+02:00 stephaneンドング メファネ <stephane at fujielectric.com>:

> Hello,
>
> I would like to report a few problems encountered on Paraview 5.1.
> I am running the Binary-MPI version on Win7, on a workstation with 32
> threads (16 physical cores right?).
> When running in Parallel with Ensight data, I am using the same
> workstation as both Server and client:
>
> - I can execute the pvserver (mpiexec -n 4 pvserver) up to n =24 without
> problem
> - From there on the same machine I launch a paraview session and connect
> to the server
> - I Can launch the geometry without problem
>
> The problem occurs when I load the D3 filter on the geometry  with n>12. I
> get an error message. This problem was already reported on March 18th, 2016
> by another user.
>
> If I stick to 12 cores or less I get another problem with the following
> workflow:
> I want to apply the StreamTracerWithCustomSource (STWCS) in Parallel so I
> do the following:
>
> 1) Save the Source surface as a *vtm file, and read it back in current
> session
> 2) Apply D3 filter to Full model
> 3) Apply STWCS filter with D3 filter as input and *vtm surface as source.
>
> this workflow works perfectly, but there are too many seeds so after step2:
> 3')Apply MaskPoints to *vtm surface
> 4)Apply STWCS filter with D3 filter as input and result of MaskPoints as
> source ==> Paraview Crashes in Parallel (This works well in a non-parallel
> session)
>
> Finally a question on Delaunay2D
>
> I have a point clouds extracted from a surface with a big hole in the
> middle. Applying Delaunay2d Always closes the hole. is there a way to keep
> the hole ?
>
> Thanks in advance.
>
>
> Ndong-Mefane Stephane, Dr.Eng
> Basic Design Sec.
> Steam Turbine Dept.
> Kawasaki Factory
>
> Fuji Electric Co., Ltd
> 1-1, Tanabeshinden, Kawasaki-ku,
> Kawasaki-city 210-9530, Japan
> Phone: +81-44-329-2155
> Fax: +81-44-329-2394
>
>
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