[vtk-developers] Quadratic convenience classes in vtkUnstructuredGrid

[Mathieu Malaterre]

 Hi Ken,

  Indeed ! I believe you can track back the change to me at some point
last year. One group (michelin, France) is using a sort of multi-UG to
represent there tires. So they have multiple (= a lot!) vtkUG and they realize
that performance was affected by that. Since they only use a limited
subset of the available vtkCell in VTK and because you do not need
explicit representation of a Cell they submited the patch.

  the other cells were proposed by a vtk user, and I guess he
implemented those classes at the time where vtkCell sublcasses would
instanciate everything in the cstor.

  I believe this is safe to change the current behavior of the new
Bi/Tri quad cell to copy the behavior of the older quad cell.

2 cents,
-Mathieu

> On 5/21/07, Moreland, Kenneth <kmorel at sandia.gov> wrote:
> > I was doing some debugging and noticed that several of the convenience
> > vtkCell classes for some of the quadratic types (QuadraticLinearQuad,
> > BiQuadraticQuad, etc.) are being instantiated in the vtkUnstructuredGrid
> > constructor whereas all the others are set to NULL until used.  Is there
> > a reason for this?
> >
> > -Ken
> >
> >    ****      Kenneth Moreland
> >     ***      Sandia National Laboratories
> > ***********
> > *** *** ***  email: kmorel at sandia.gov
> > **  ***  **  phone: (505) 844-8919
> >     ***      fax:   (505) 845-0833
> >
> >
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>
>
> --
> Mathieu
>


-- 
Mathieu