NonManifoldMerge

The NonManifoldMerge tool can be used to combine several manifold or non-manifold* surfaces or polysurfaces into a single non-manifold polysurface. It is a built-in Rhino command but is provided in the Griddle toolbar for convenience as it is useful when operating with Rhino surfaces from which surface and volume meshes will be created.

Starting with surfaces or polysurfaces that fully connect along one or more edges (as in the image below), a single polysurface can be created with the NonManifoldMerge tool. This polysurface can later be meshed using Rhino’s Mesh command resulting in a fully conformal non-manifold mesh with all parts of the mesh being properly attached, as opposed to the case of meshing multiple surfaces separately. At this stage the mesh is ready for remeshing with GSurf with no need to use surface mesh intersector. The advantage to this approach is that it avoids problems related to using improper tolerances during the mesh intersection (GInt) and provides accurate results faster. However, a drawback is that the output surface mesh is now a single complex nonmanifold object (it can be split into pieces using GExtract).

Original Rhino object consisting of 41 surfaces and 7 extrusions.
After using the NonManifoldMerge tool, the Rhino object is now a single polysurface ready for surface and then volume meshing.

*Edges of polysurfaces or meshes that have more than two faces joined to a single edge are non-manifold (McNeel, 2015).


Latest News
  • Introducing FLAC2D Itasca is very pleased to announce FLAC2D as the next generation of our foundational software,...
    Read More
  • Itasca Partners with Rescale for FLAC3D Cloud Computing With the advent of web licenses, Itasca software can be run in the cloud via...
    Read More
  • Software Forum Now Open Itasca has launched a new software forum to provide a platform for users to ask...
    Read More

Upcoming Events
23 May
71st Highway Geology Symposium
Better highways through applied geology.... Read More
20 Jun
URTeC 2022
The Unconventional Resources Technology Conference (URTeC) is an event focused on the latest science and technology applied to explorat... Read More
20 Jun
IAEA International Conference on the Safety and Security of Radioactive Sources
The IAEA is organizing the International Conference on the Safety and Security of Radioactive Sources - Accomplishments and Future Ende... Read More