Trelis 16.5 User Documentation
Trelis currently offers several options for modifying an existing finite element mesh. In addition to providing for coarsening and refining of hexahedral and triangle meshes, Trelis can also reposition nodes by smoothing or by moving individual nodes.
The collapse edge command is also provided for making small modifications to an existing triangle mesh.
Meshedit Collapse Edge <id>
This command will collapse the two triangles associated with the given edge, effectively removing the triangles from the mesh. This command only works on surface meshes, and only with triangles. If volumetric elements, or quads, are attached to the edge, the command does nothing to the mesh.