TetGen is a quality tetrahedral mesh generator and a three-dimensional Delaunay triangulator. TetGenLink TetGen is a Wolfram System application that uses Wolfram LibraryLink to link to TetGen functions. It is used automatically by the Wolfram Language for various operations, such as interpolation in three-dimensional domains. However, it can also be used directly where it gives a flexible and innovative way to use the functionality of TetGen.