[petsc-users] Inquiry about reading the P2 tetrahedron mesh from GMSH

Matthew Knepley knepley at gmail.com
Mon Jul 17 19:20:31 CDT 2023

On Fri, Jun 30, 2023 at 4:40 PM neil liu <liufield at gmail.com> wrote:

> Dear Petsc developers,
> I am reading P2 mesh from GMSH. And used DMFieldGetClosure_Internal to
> check the coordinates for each tetrahedron, It seems reasonable.
> But when I tried DMGetCoordinates (dm, &global),  it seems the vector
> global is not consistent with the node number, Then what is global here?

Reading high order coordinates works for quads/hexes, but not simplices
right now because I need to figure out what order GMsh stores the
coordinates in. Thus we are defaulting to affine coordinates here.



> Thanks,
> Xiaodong

What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener

https://www.cse.buffalo.edu/~knepley/ <http://www.cse.buffalo.edu/~knepley/>
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