[Gmsh] Not grasping something correctly.

[Christophe Geuzaine]

> On 5 Jul 2020, at 12:08, Keith Sloan <keith at sloan-home.co.uk> wrote:
> 
> I am trying to add various gmsh facilities to a FreeCAD workbench.
> 
> One is a straight Tessellate of a FreeCAD shape or mesh.
> 
> I think I have the meshing correct as if I save the mesh of a Cube I get the attached file.
> 
> But I am having problems recreating a visual mesh under FreeCAD.
> 
> To recreate the Facets I have a function that does
> 
> nodes, coordLst, pcords = gmsh.model.mesh.getNodes(2)
> 
> # should return nodes and coordinate
> 
> faceNodes = gmsh.model.mesh.getElementFaceNodes(2,3,-1,True)
>  # nodes, coords are numpy arrays
> 
> But don't seem to be retrieving the info for the triangular faces in the mesh must
> be not understanding something.

With gmsh.model.mesh.getNodes(2) you will only get nodes classified on surfaces of the model. If you plan to use gmsh.model.mesh.getElementFaceNodes() you will need all the nodes (i.e. classified on model points, curves and volumes as well).

Christophe



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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine