[vtk-developers] Optimization of vtkClipDataSet and vtkProbeFilter for large data?

[Dr. Miroslav Sejna]

John,

this is interesting, thank you. When I was searching for a solution, I noticed several your discussions (e.g. "Useless triangulation in unstructured grid rendering") but did not find vtkSPHProbeFilter. I will have a look at it.

My solution already works fine for PointData (not yet for CellData) and seems to be sufficient for now. I also believe that it is an universal solution for all filters that internally use "vtkDataArray::InterpolateTuple" (i.e. vtkClipDataSet and vtkProbeFilter, but there is more such filters). However, it is too early to make any conclusions - I will need more time for thorough testing.

Thanks Mirek

From: Biddiscombe, John A. [mailto:biddisco at cscs.ch]
Sent: Wednesday, June 03, 2015 10:43 AM
To: Dr. Miroslav Sejna; Will Schroeder
Cc: vtk-developers
Subject: RE: [vtk-developers] Optimization of vtkClipDataSet and vtkProbeFilter for large data?

Mirek

I’m not sure I followed your explanation, but in case you’re doing more work than you need to...

It is possible to compute interpolation weights and reuse them
here I have computed weights for an interpolation (in the weights array)
https://github.com/biddisco/pv-meshless/blob/master/vtkSPHProbeFilter.cxx#L944
and then pass them to the attribute arrays for computing the new values for each field at the point Id.

(I use this on very large datasets, no problem)

JB

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