# About define the the border lines of 3D cuboid plate divided by Tetgen

**URL:** https://community.freefem.org/t/about-define-the-the-border-lines-of-3d-cuboid-plate-divided-by-tetgen/979
**Category:** General Discussion
**Created:** [May 15, 2021, 5:10am UTC](https://community.freefem.org/t/about-define-the-the-border-lines-of-3d-cuboid-plate-divided-by-tetgen/979 "2021-05-15T05:10:30Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![HGH](https://avatars.discourse-cdn.com/v4/letter/h/3be4f8/32.png) [@HGH](https://community.freefem.org/u/HGH)
#### Post date: [May 15, 2021, 5:10am UTC](https://community.freefem.org/t/about-define-the-the-border-lines-of-3d-cuboid-plate-divided-by-tetgen/979/1 "2021-05-15T05:10:30Z")

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Hello, guys

Who know how to define the the border lines of 3D cuboid plate divided by Tetgen ? I mean I need PDF for vibration, and border lines for Dirichlet condition, but it looks like only face can be defined in 3D model, and border lines can be not

Thank you