# vtkTableBasedClipDataSet

**URL:** https://discourse.vtk.org/t/vtktablebasedclipdataset/16162
**Category:** Support
**Created:** [November 28, 2025, 2:14am UTC](https://discourse.vtk.org/t/vtktablebasedclipdataset/16162 "2025-11-28T02:14:07Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![keke](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/k/c5a1d2/32.png) [@keke](https://discourse.vtk.org/u/keke)
#### Post date: [November 28, 2025, 2:14am UTC](https://discourse.vtk.org/t/vtktablebasedclipdataset/16162/1 "2025-11-28T02:14:07Z")

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I am using `vtkTableBasedClipDataSet` to clip a `vtkUnstructuredGrid`. How can I determine which points in the output `vtkUnstructuredGrid` are newly generated?

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### Author: ![mwestphal](https://discourse.vtk.org/user_avatar/discourse.vtk.org/mwestphal/32/19_2.png) [@mwestphal](https://discourse.vtk.org/u/mwestphal)
#### Post date: [November 28, 2025, 9:32am UTC](https://discourse.vtk.org/t/vtktablebasedclipdataset/16162/2 "2025-11-28T09:32:27Z")

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This can be approximated using original point ids and interpolation but there is not clean way to do that, it would be easy to add though, feel free to open an issue: [https://gitlab.kitware.com/vtk/vtk/-/issues](https://gitlab.kitware.com/vtk/vtk/-/issues)