Non-manifold assembly
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Tue, 11/10/2009 - 18:17
Following a non-manifold assembly of the cerebrum and the cerebellum of the human brain, I want to generate a tetrahedral mesh in the mimics remesher. I had created the non-manifold assembly followed by sharp triangle filtering and auto-remesh. As I try to create a volume mesh, I get an error “surface mesh contains double triangles”. I deleted intersecting and double triangles but I get another error message “model contains holes” or worse still I at times get lots of little chunks of volumes. Does anyone know why and how I could mesh the non-manifold assembly of the cerebellum and cerebrum? Thank you
(1 vote)
When creating non-manifold assemblies, it is possible that some triangles are very near and will be interpreted as overlapping triangles. That is especially frequent in complex geometries, such as the brain. When deleting intersecting and overlapping triangles, it is important to make sure that no gaps are left in the mesh. In case the "model contains holes" a volume mesh cannot be generated since it is not a watertight model.
Regarding the second issue that you mention, until now one sub-volume was generated for each closed surface in the model. In Mimics 13.1 you can select to group the sub-volumes by material, meaning that if you generated the non-manifold assembly based on the mask method, one sub-volume will be generated for each segmentation mask.