# I want to get boundaries that change with the perspective

**URL:** https://discourse.vtk.org/t/i-want-to-get-boundaries-that-change-with-the-perspective/6410
**Category:** Support
**Created:** [August 18, 2021, 3:18am UTC](https://discourse.vtk.org/t/i-want-to-get-boundaries-that-change-with-the-perspective/6410 "2021-08-18T03:18:38Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![kingui1106](https://discourse.vtk.org/user_avatar/discourse.vtk.org/kingui1106/32/3780_2.png) [@kingui1106](https://discourse.vtk.org/u/kingui1106)
#### Post date: [August 18, 2021, 3:18am UTC](https://discourse.vtk.org/t/i-want-to-get-boundaries-that-change-with-the-perspective/6410/1 "2021-08-18T03:18:38Z")

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I want to get boundaries that change with the perspective.  
I can not find it, can you help me.

 ![企业微信截图_20210818111742](https://discourse.vtk.org/uploads/default/original/2X/1/13289b15b9f167446285196cef7fbbba22dfc6a0.png)

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### Author: ![kingui1106](https://discourse.vtk.org/user_avatar/discourse.vtk.org/kingui1106/32/3780_2.png) [@kingui1106](https://discourse.vtk.org/u/kingui1106)
#### Post date: [August 20, 2021, 9:34am UTC](https://discourse.vtk.org/t/i-want-to-get-boundaries-that-change-with-the-perspective/6410/2 "2021-08-20T09:34:07Z")

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I want to get boundaries of actor that change with the perspective.  
I use it before,but i forget.  
I try vtkOutlineFilter, but it not my want.

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### Author: ![codeling](https://discourse.vtk.org/user_avatar/discourse.vtk.org/codeling/32/3792_2.png) [@codeling](https://discourse.vtk.org/u/codeling)
#### Post date: [August 20, 2021, 11:01am UTC](https://discourse.vtk.org/t/i-want-to-get-boundaries-that-change-with-the-perspective/6410/3 "2021-08-20T11:01:34Z")

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Maybe you’re looking for [vtkPolyDataSilhouette](https://vtk.org/doc/nightly/html/classvtkPolyDataSilhouette.html)?