[Paraview] Fwd: Construct 3D revolved mesh from a 2d mesh

[Paul Edwards]

---------- Forwarded message ----------
From: Paul Edwards <paul.m.edwards at gmail.com>
Date: 1 February 2013 13:44
Subject: Re: [Paraview] Construct 3D revolved mesh from a 2d mesh
To: Andrew Parker <andy.john.parker at googlemail.com>


Hi Andy,

Rotation extrusion is a polydata algorithm which is why you are not seeing
a unstructured grid.  I'm not sure that you will find a VTK algorithm to do
this for you but you could probably quite easily do it with a python
programmable filter (to make it easier you may want to clip the surface
first).  You could use the transform filter internally to give you the next
set of faces and it will also rotate the vectors for you (although it will
only rotate the current vector IIRC).

Regards,
Paul


On 1 February 2013 10:06, Andrew Parker <andy.john.parker at googlemail.com>wrote:

> Sorry to repost.  Does anybody have a feel for whether I can apply a
> filter and essentially produce a 3d volume mesh with associated scalars and
> transformed vectors, from it's 2d counter part using vtk?
>
> i.e. a cylindrically symmetric simulation converted to a valid 3d volume
> mesh.  I can apply the filter, similar to this thread:
>
> http://www.paraview.org/pipermail/paraview/2012-March/024320.html
>
> but in my case, rather than for presentational purposes, I need the
> internal of the rotated shell to be a populated volume mesh.  Using the
> method in the above post, or described in my previous post gives only the
> outer shell.
>
> Any help either way really appreciated!
>
> Cheers,
> Andy
>
>
>
> All,
>>
>> I am doing this in code using vtk, but can be reproduced using paraview
>> as noted below.
>>
>> I have a 2d mesh which represent a cylindrically symmetric simulation.  I
>> want to be able to revolve this around the z-axis to create a 3d mesh.
>>  However, when doing this using the rotational extrusion filter, I only
>> seem to have boundary faces.  I can't get this to give me 3d cells inside
>> the volume of revolution, which is what I'm after.  Can this be done?  I
>> have done this in visit and sure enough the mesh is inside the volume of
>> revolution as I expect.
>>
>> This can be reproduced in paraview using the UCD_00003.inp example from
>> the data set.
>>
>> First apply a transform and rotate around 90 degrees round the y axis.
>>  Then apply the extract surface filter. I too must do this in my code as
>> the incoming mesh is a vtkUnstructuredGrid and the rotational extrusion
>> filter wants a polydata.  Then apply the rotational extrusion filter for
>> 360 degrees with 120 resolution.  Finally perform an x-normal slice at the
>> default position.  Viewing only the slice shows the outer boundary only,
>> but I had wanted the interior of the boundary to be populated with a mesh,
>> not bothered about its topology, just want a fully populated mesh within
>> the interior.
>>
>> Again, any help on the above really appreciated??  As I say achieved with
>> visit....which I mention only because I assume the code under the hood
>> would be vtk and hence possible in my case.
>>
>> Many thanks,
>> Andy
>>
>
>
>
> _______________________________________________
> 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
>
> Follow this link to subscribe/unsubscribe:
> http://www.paraview.org/mailman/listinfo/paraview
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.paraview.org/pipermail/paraview/attachments/20130201/af3a48eb/attachment.htm>