<div dir="ltr">Long term I'd like to think how we could represent a CAD model with a large number of trimmed splines.</div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Jul 3, 2015 at 9:04 AM, David Thompson <span dir="ltr"><<a href="mailto:david.thompson@kitware.com" target="_blank">david.thompson@kitware.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi all,<br>
<br>
You are correct that the GSoC project is not using vtkExplicitCell. Instead, each NURBS patch will be a vtkStructuredGrid of control points with field data specifying knots. Collections of NURBS could live in a multiblock dataset.<br>
<br>
If you would prefer NURBS to be represented as cells instead of a special way to use a dataset, then we can keep vtkExplicit cell and adapt to it. But given that there are many different spline interpolants (NURBS, NURCCs, T-splines, point-based splines) it might be better to just consider them as datasets that are discretized at some point in a pipeline than as cells in their own right.<br>
<span class="HOEnZb"><font color="#888888"><br>
    David<br>
</font></span><div class="HOEnZb"><div class="h5"><br>
On Jul 2, 2015, at 10:49 AM, Bill Lorensen <<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>> wrote:<br>
<br>
> All cells have a method IsExplicitCell(). They all return 0. I assume<br>
> we should keep this method for backward compatibility?<br>
><br>
> Bill<br>
><br>
><br>
> On Thu, Jul 2, 2015 at 10:27 AM, Berk Geveci <<a href="mailto:berk.geveci@kitware.com">berk.geveci@kitware.com</a>> wrote:<br>
>> I say yank it.<br>
>><br>
>> On Thu, Jul 2, 2015 at 9:12 AM, Bill Lorensen <<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>><br>
>> wrote:<br>
>>><br>
>>> Folks,<br>
>>><br>
>>> vtkExplicitCell is not used nor tested anywhere in vtk.<br>
>>><br>
>>> Can it be removed?<br>
>>><br>
>>> Bill<br>
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>><br>
><br>
><br>
><br>
> --<br>
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</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">William J. Schroeder, PhD<br>Kitware, Inc.<br>28 Corporate Drive<br>Clifton Park, NY 12065<br><a href="mailto:will.schroeder@kitware.com" target="_blank">will.schroeder@kitware.com</a><br><a href="http://www.kitware.com" target="_blank">http://www.kitware.com</a><br>(518) 881-4902</div>
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