Matthew Knepley <knep...@gmail.com> writes: > On Fri, Jun 2, 2017 at 5:04 PM, Alberto Paganini < > alberto.pagan...@maths.ox.ac.uk> wrote: > >> Dear PETSc developers, >> >> I'm Alberto and I'm a user of the finite element library Firedrake, >> which relies on DMPlex to import meshes. >> > > Great. > > >> In order to use higher-order FEs, it is desirable to import higher-order >> meshes. >> > > I really do not like that term. Let me try and convince you that it is > wrong. The topology of the > mesh is unchanged. You are only talking about the order of the > representation of the geometry > field. Thus, it is not the mesh that is "higher order", but the geometry. > > >> I've been told that DMPlex does not offer this future (at present). >> > > Toby just merged this to master, so I think we can say that we have alpha > support for this. How > does it work? We already have a coordinateDM and coordinates Vec, so you > just choose a > higher order discretization for the DS inside the coordinateDM. Does that > make sense?
Can it load quadratic geometry from a file (ExodusII or otherwise)? That's the interesting part -- the quadratic geometry is rarely interesting except in elements that touch the boundary and you can't infer the true curved boundary without access to a geometric model (a much more cumbersome software stack).
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