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IDProjectCategoryView StatusLast Update
0001988FreeCADBugpublic2017-01-22 21:49
Reportershoogen Assigned To 
PrioritynoneSeveritymajorReproducibilityalways
Status closedResolutionnot fixable 
Product Version0.15 
Summary0001988: Mefisto Mesh fails with error 13
DescriptionMefisto can't mesh the attached face and fails with the message:
MEFISTO_2D failed on subshape #1 with error 13 "Error in Triangulation (aptrte())"
TagsMesh, SMESH
FreeCAD Information

Activities

shoogen

2015-03-02 13:29

developer  

face-mefisto-tp1.brep (Attachment missing)

wmayer

2015-03-02 14:36

administrator   ~0005849

Last edited: 2015-03-02 14:37

The netgen mesh also reports an error but gives at least a result:
NETGEN_2D failed on subshape # 2 with error COMPERR_ALGO_FAILED "Problem in Surface mesh generation"

The critical part of the shape is where the hole touches the boundary in a single point. The meshing algorithm has to create two triangles that share a common point but not a common edge.
However, in some literature about mesh structures this is considered invalid -- called a "non-manifold vertex".

So maybe, this could be the reason why Mefisto doesn't return anything. And when you zoom-in deep enough into the mesh that netgen generates you will see that there is a little gap.

Issue History

Date Modified Username Field Change
2015-03-02 13:29 shoogen New Issue
2015-03-02 13:29 shoogen File Added: face-mefisto-tp1.brep
2015-03-02 13:29 shoogen Tag Attached: SMESH
2015-03-02 13:29 shoogen Tag Attached: Mesh
2015-03-02 14:36 wmayer Note Added: 0005849
2015-03-02 14:37 wmayer Note Edited: 0005849
2017-01-22 21:49 wmayer Status new => closed
2017-01-22 21:49 wmayer Resolution open => not fixable