This program extracts all inner and outer boundaries of 2D grids and identifies zero-velocity boundary points. Moreover, inward or outward normal vectors on boundary points are calculated. You can use 2D grids with any type of cell and various file extensions such as *.vtk and *.vtu.
Please refer to Documentation page or doc/UserGuide.pdf.
You may install by building source or getting the ready package from Ubuntu repos.
Just download the installer and do the following:
$ sudo chmod +x installer
$ sudo ./installer
For Ubuntu users, the package has been added to the Ubuntu repository. Type in terminal:
$ sudo add-apt-repository ppa:ameli/extractboundary
$ sudo apt-get update
$ sudo apt-get install extractboundary
You may use the code either in command line or as a ParaView plugin.
-
Specifying input and output paths within files:
$ extractboundary /InputPath/InputData.vtk /OutputPath/OutputData.vtk -
No output file is specifies. Default name will be used for output file:
$ extractboundary InputData.vtk -
Using options:
- outward normals (with -n)
- search all inner and outer boundaries (with -s)
- identify zero-velocity points (with -z)
$ extractboundary InputData.vtk OutputData.vtk -n outward -s all -z
In ParaView, from tools menu open Manage Plugins. Then load bin/libExtractBoundary.so file. Next, in Filters menu go to Extensions and apply Extract Boundary filter to your pipeline.
You may refer to UserGuide or wiki for picture illustrations.
Its free and open source under GNU/zlib license. Please see LICENSE.txt for terms.
Siavash Ameli
Shadden Research Group
University of California, Berkeley