# Convert TRIANGLE\_STRIPS to POLYGONS

**URL:** <https://discourse.slicer.org/t/convert-triangle-strips-to-polygons/408>\
**Category:** Support\
**Created:** [May 31, 2017, 6:46pm UTC](https://discourse.slicer.org/t/convert-triangle-strips-to-polygons/408 "2017-05-31T18:46:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [May 31, 2017, 6:46pm UTC](https://discourse.slicer.org/t/convert-triangle-strips-to-polygons/408/1 "2017-05-31T18:46:36Z")

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From the mailing list:

Hi, I am just one beginner of 3D slicer and try to generate VTK file from MRI  
image to import into mapping system. However, 3D slicer generated VTK file  
with TRIANGLE\_STRIPS and I need POLYGONS format to upload the information.  
Can someone give me any suggestion?

Best Regards,

Ting-Yung Chang

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<div class="post-metadata">

**Author:** ![pieper](https://sea2.discourse-cdn.com/flex002/user_avatar/discourse.slicer.org/pieper/32/8_2.png) [@pieper](https://discourse.slicer.org/u/pieper)\
**Post date:** [May 31, 2017, 6:46pm UTC](https://discourse.slicer.org/t/convert-triangle-strips-to-polygons/408/2 "2017-05-31T18:46:51Z")

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Hi -

You can use a vtkTriangleFilter [1], like what is done here [2].

[1] [http://www.vtk.org/doc/nightly/html/classvtkTriangleFilter.html](http://www.vtk.org/doc/nightly/html/classvtkTriangleFilter.html)

[2] [https://www.slicer.org/wiki/Documentation/Nightly/ScriptRepository#Export\_model\_to\_Blender.2C\_including\_color\_by\_scalar](https://www.slicer.org/wiki/Documentation/Nightly/ScriptRepository#Export_model_to_Blender.2C_including_color_by_scalar)