[petsc-users] DMPlex for high order elements

[Jed Brown]

Alejandro D Otero <aotero at fi.uba.ar> writes:

> Hi, I am trying to define a spectral element mesh in the frame of DMPlex
> structure.
> To begin with I am thinking of quadrilateral 2d elements. Lets say I have a
> 16 node element with 2 nodes on each edge besides the 2 corners and 4 nodes
> inside the element. I'd like to treat all nodes as vertex in the DMPlex
> structure.

That's not the intended way to use DMPlex.  You associate an arbitrary
number of dofs with each topological entity (vertex, edge, face, cell).
So for your Q_3 elements in 2D, you would put 1 dof at vertices, 2 at
edges, and 4 at cell interiors.
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