# Set orthogonal vectors on each polygon of a polyData

**URL:** <https://discourse.slicer.org/t/set-orthogonal-vectors-on-each-polygon-of-a-polydata/20946>\
**Category:** Support\
**Created:** [December 7, 2021, 9:25am UTC](https://discourse.slicer.org/t/set-orthogonal-vectors-on-each-polygon-of-a-polydata/20946 "2021-12-07T09:25:32Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![MathiasBrucker](https://avatars.discourse-cdn.com/v4/letter/m/898d66/32.png) [@MathiasBrucker](https://discourse.slicer.org/u/MathiasBrucker)\
**Post date:** [December 7, 2021, 9:25am UTC](https://discourse.slicer.org/t/set-orthogonal-vectors-on-each-polygon-of-a-polydata/20946/1 "2021-12-07T09:25:33Z")

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Operating System: Winx64  
Slicer Version: 4.11.20  
On a vtkmrmlmodelnode you can extract the vtkpolydata.On each polygon we want to set an orthogonal vector from the plane, since we want to measure the distance to an object orthogonally. is this somehow possible? If so please help us out and thanks in advance for your answers