# Bool operation between concave poly and cube

**URL:** https://discourse.vtk.org/t/bool-operation-between-concave-poly-and-cube/9489
**Category:** Support
**Created:** [September 29, 2022, 3:41am UTC](https://discourse.vtk.org/t/bool-operation-between-concave-poly-and-cube/9489 "2022-09-29T03:41:43Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![lele.wang](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/l/cdc98d/32.png) [@lele.wang](https://discourse.vtk.org/u/lele.wang)
#### Post date: [September 29, 2022, 3:41am UTC](https://discourse.vtk.org/t/bool-operation-between-concave-poly-and-cube/9489/1 "2022-09-29T03:41:44Z")

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Hi all,

 ![2](https://discourse.vtk.org/uploads/default/original/2X/4/428e2087fc372eb93ea25df129d98ff623a85c09.png)

I tried to use a concave body and a cube for Boolean calculation and difference. Before calculation, I used vtkTriangleFilter to triangulate them respectively. The calculated results are not what I want。  
Any Idea？

Senna