# Fillet (Round the Vertex with an Arc) a 3D Polyline

**URL:** https://discourse.vtk.org/t/fillet-round-the-vertex-with-an-arc-a-3d-polyline/13523
**Category:** Support
**Created:** [March 13, 2024, 10:16am UTC](https://discourse.vtk.org/t/fillet-round-the-vertex-with-an-arc-a-3d-polyline/13523 "2024-03-13T10:16:00Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Lopez](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/l/a9adbd/32.png) [@Lopez](https://discourse.vtk.org/u/Lopez)
#### Post date: [March 13, 2024, 10:16am UTC](https://discourse.vtk.org/t/fillet-round-the-vertex-with-an-arc-a-3d-polyline/13523/1 "2024-03-13T10:16:01Z")

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I want to make constant Radius Arf of the Lines of a 3D-Polyline, making it tangent to both lines. Like this:

[Fillet Curve Node — Blender Manual](https://docs.blender.org/manual/en/latest/modeling/geometry_nodes/curve/operations/fillet_curve.html)

I Saw a similar topic but for a closed Form:

[2D arc fillet using VTK - Support - VTK](https://discourse.vtk.org/t/2d-arc-fillet-using-vtk/6268)

Best Regards