# How to invert the single cell's normal ?

**URL:** https://discourse.vtk.org/t/how-to-invert-the-single-cells-normal/7683
**Category:** Support
**Created:** [January 20, 2022, 8:05am UTC](https://discourse.vtk.org/t/how-to-invert-the-single-cells-normal/7683 "2022-01-20T08:05:07Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![AlexLuya](https://discourse.vtk.org/user_avatar/discourse.vtk.org/alexluya/32/4036_2.png) [@AlexLuya](https://discourse.vtk.org/u/AlexLuya)
#### Post date: [January 20, 2022, 8:05am UTC](https://discourse.vtk.org/t/how-to-invert-the-single-cells-normal/7683/1 "2022-01-20T08:05:07Z")

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Hello,I knew how to invert the all normal of an actor,question is how to inver the cell normal of a single cell?

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### Author: ![AlexLuya](https://discourse.vtk.org/user_avatar/discourse.vtk.org/alexluya/32/4036_2.png) [@AlexLuya](https://discourse.vtk.org/u/AlexLuya)
#### Post date: [January 21, 2022, 7:32am UTC](https://discourse.vtk.org/t/how-to-invert-the-single-cells-normal/7683/2 "2022-01-21T07:32:46Z")

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vtkPolyData-\>ReverseCell(int cellId)