[vtk-developers] vtkPentagonalPrism Bug

[Andrew Maclean]

Hi Bill,
   I played around with it today and I am pretty sure that the problem lies
with the EXPRA ... EXPRN defines in vtkPentagonalPrism.cxx. These are used
in InterpolationFunctions(), InterpolationDerivs().

EvaluateLocation() uses InterpolationFunctions()  to determine the weights.

I don't understand the mathematical basis for the calculation of these and
a web search has not revealed anything.

Regards
    Andrew


> ---------- Forwarded message ----------
> From: Bill Lorensen <bill.lorensen at gmail.com>
> To: VTK Developers <vtk-developers at vtk.org>
> Cc: Mathieu Malaterre <mathieu.malaterre at gmail.com>
> Date: Sun, 7 Jun 2015 14:40:27 -0400
> Subject: Re: [vtk-developers] vtkPentagonalPrism Bug
> Sorry, the posted code was incorrect, but the results are still wrong...
>
>
> On Sat, Jun 6, 2015 at 12:48 PM, Bill Lorensen <bill.lorensen at gmail.com>
> wrote:
> > Folks,
> >
> > I've been working on a Unit test for linear cells. So far I have found
> > a few bugs that I could easily fix.
> >
> > My testing has uncovered a problem with vtkPentagonalPrism that I
> > cannot fix on my own.
> >
> > If I compute the real center from the parametric center, the real
> > center is not within the bounds of the cell. This is the only cell
> > that fails this test.
> >
> > I have attached a small program and cmake file that illustrates the
> problem.
> >
> > Bill
>
>
>
> --
> Unpaid intern in BillsBasement at noware dot com
>
>
> --
___________________________________________
Andrew J. P. Maclean

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