[Dune] Reading arbitrary polygonal meshes in Dune

[Ganesh Diwan]

Dear list,

I am working on implementing virtual element computations inside Dune. This
will involve implementing the algorithm on arbitrary shaped elements. Is
there a way to read arbitrary polygonal (2d) or polyhedral (3d) meshes in
Dune? Currently implemented Grid managers (ALUGrid, SPGrid etc.) identify
either simplices or cube types.

Can the GridFactory class be used for this purpose? Grid-howto document
says when building a new gridtype Dune may have a problem for unidentified
element type. Say, I have an element with five edges (a pentagon). In this
case, is Dune likely to throw an exception for unidentified element type?

I wanted to get the Grid guru's thoughts before investing time in this.

Thank you!
Ganesh
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