[vtkusers] algorithm performance

[Bill Lorensen]

Are the slice planes parallel to each other, or are they arbitrarily
oriented?

If they are parallel, then you could compute point data scalars once and
leave out the implicit function. Then Cutter will use the scalar data for
cutting. This would avoid recomputing the scalar field for each slice.



On Fri, Aug 2, 2013 at 11:31 AM, Gerrick Bivins <
Gerrick.Bivins at halliburton.com> wrote:

>  Hi Bill,****
>
> We are building release. Our grids are large at least 10’s – 100’s of
> thousands of cells.****
>
> I’m seeing the behavior in a Paraview  install as well,****
>
> with auto-apply on. Trying to move the slice plane through ****
>
> the dataset becomes less and less interactive as the dataset cell count
> increases.****
>
> So I was hoping there were some ways to speed this up.****
>
> Any other suggestions?****
>
> Gerrick****
>
> ** **
>
> *From:* Bill Lorensen [mailto:bill.lorensen at gmail.com]
> *Sent:* Friday, August 02, 2013 10:18 AM
> *To:* Gerrick Bivins
> *Cc:* vtkusers at vtk.org
> *Subject:* Re: [vtkusers] algorithm performance****
>
> ** **
>
> Also be sure you build VTK and your app Release and not Debug.****
>
> ** **
>
> ** **
>
> On Fri, Aug 2, 2013 at 11:08 AM, Gerrick Bivins <
> Gerrick.Bivins at halliburton.com> wrote:****
>
> Hi All,****
>
> I’m looking for suggestions on how to speed up an algorithm on large
> unstructured grids, like vtkCutter.****
>
> I thought I could build an octree (or similar structure) from the input
>  and execute the vtkCutter on the octree****
>
> but it’s not obvious to me how to do it. Is something like this possible?*
> ***
>
> How can I improve the speed of the algorithm? Performance seems to go down
> as cell count grows.****
>
> Gerrick****
>
>  ****
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