# How to use VTK

**URL:** https://discourse.vtk.org/t/how-to-use-vtk/2212
**Category:** Support
**Created:** [December 5, 2019, 8:03am UTC](https://discourse.vtk.org/t/how-to-use-vtk/2212 "2019-12-05T08:03:03Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![minmin](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/m/6de8d8/32.png) [@minmin](https://discourse.vtk.org/u/minmin)
#### Post date: [December 5, 2019, 8:03am UTC](https://discourse.vtk.org/t/how-to-use-vtk/2212/1 "2019-12-05T08:03:03Z")

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Sorry for the amateur question.  
I want to use vtkSelectEnclosedPoints. Even if you look at [https://vtk.org/doc/nightly/html/classvtkSelectEnclosedPoints.html](https://vtk.org/doc/nightly/html/classvtkSelectEnclosedPoints.html), it is not easy to understand. Are there any examples of Sphere closed surfaces and 1-point data?  
Thank you.