<div dir="ltr">Try the Cell Centers filter. Out.vtu --> Cell Centers --> Glyph.<br><br>Pat<br></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Tue, Apr 16, 2013 at 10:10 PM, <span dir="ltr"><<a href="mailto:pieter@redpanda.nl" target="_blank">pieter@redpanda.nl</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Pat, Berk,<br>
<br>
Thanks for your replies. Displaying the cellNormals works fine now, but I<br>
still can't select the normals computed in my Python script from the<br>
dropdown menus in the Glyph filter.<br>
<br>
I uploaded the relevant .VTU file to my web space, you can find it at<br>
<a href="http://redpanda.nl/Out.vtu" target="_blank">http://redpanda.nl/Out.vtu</a> (look for the data named "Normal", it has X, Y<br>
and Z components).<br>
<br>
Could you take a look at it?<br>
<br>
Best,<br>
Pieter<br>
<div class="HOEnZb"><div class="h5"><br>
> ParaView does a weird thing, in the "Color By" drop down menu, it show an<br>
> array named "cellNormals" but this array doesn't actually exist on the<br>
> data<br>
> object, and it doesn't appear in the information tab. So, as Berk said,<br>
> you should apply the Generate Surface Normals filter, and make sure you<br>
> check the "Compute Cell Normals" check box. Then you can use the "Cell<br>
> Centers" to generate point data at the cell centers. Then you can use the<br>
> Glyph filter to draw the arrows for the cell normals.<br>
><br>
> Pat<br>
><br>
><br>
> On Tue, Apr 16, 2013 at 10:03 AM, Berk Geveci<br>
> <<a href="mailto:berk.geveci@kitware.com">berk.geveci@kitware.com</a>>wrote:<br>
><br>
>> Does the file actually contain normals? I am guessing not. In that case,<br>
>> do:<br>
>><br>
>> Extract Surface<br>
>> Generate Surface Normals<br>
>> Glyph<br>
>><br>
>> If you had a vtp file (polydata) instead of vtu (unstructured grid), you<br>
>> wouldn't need to Extract Surface.<br>
>><br>
>> -berk<br>
>><br>
>><br>
>> On Mon, Apr 15, 2013 at 7:27 PM, Pieter Barendrecht<br>
>> <<a href="mailto:pieter@redpanda.nl">pieter@redpanda.nl</a>>wrote:<br>
>><br>
>>> Hi all,<br>
>>><br>
>>> I have just imported a 3D parametric surface in Paraview (from a .VTU<br>
>>> file generated by a Python script), and I'm wondering how to display<br>
>>> the<br>
>>> cellNormals as actual vectors. Since a cellNormal has an X, Y and Z<br>
>>> component, it should be possible to use these three scalar values to<br>
>>> create<br>
>>> a vector, pointing from the corresponding cell.<br>
>>><br>
>>> I know I can create a vector field with the Glyph function, but I'm not<br>
>>> sure how to continue from there. I cannot select any Scalars or Vectors<br>
>>> from the two dropdown menus/lists (they are enabled but there is<br>
>>> nothing to<br>
>>> select).<br>
>>><br>
>>> Any ideas on how to proceed would be very welcome!<br>
>>><br>
>>> Best,<br>
>>> Pieter<br>
>>><br>
>>> PS: I'm using Paraview 3.98.1 on a Linux machine.<br>
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