How to Contribute

DUNE is a community project and we are happy about all forms of external contributions. There are many easy things that you can do, like

• read the documentation and tell us where and how it should be improved,
• try to install DUNE on your platform and report bugs if it doesn't work,
• fix bugs and send us patches.

If you already have some experience with DUNE there are larger projects, too. The following is a list of things that we find interesting but that we probably will never have the time to do ourselves.

Additional Features

• Write a module with language bindings for dune-grid for languages other than C++. Languages like C, Java, Python, or D would be interesting.
• Implement iterators over edges and faces in UGGrid. The challenge here is that, unlike elements and vertices, edges and faces don't exist as separate objects within UG.
• Do the same for YaspGrid. Make sure, though, that you don't noticeably slow down existing YaspGrid functionality.
• Implement a reader for UG's NG/LGM file format using the abstract grid factory interface. Currently these files can only be read using a specially configured UGGrid. Having a general reader would allow to use these files with other unstructured grid managers and would also allow to simplify the UGGrid implementation.

Documentation

• Tutorials are a good way to get started with Dune. A good tutorial for dune-istl would be of great help.

Infrastructure

Additional Grid Backends

• Write a wrapper for the Racoon II grid manager. This is a parallel AMR grid manager for 2d and 3d.
• Write a wrapper for the AmRoc grid manager. This is another AMR manager. Some initial work has been done. Ask on the mailing list for details.
• Write a parallel AMR grid manager that works in more than three space dimensions.
• Write a structured simplex grid for rectangular domains. 2d and 3d would be great, the brave can implement Freudenthal's algorithm for a general n-d simplex grid.

Meta Grids

Meta grids are DUNE grids which are parametrized by another grid. An example is SubGrid, which allows you to select a subset of elements of a DUNE grid and treat this subset as a grid in its own right. Here are a few other ideas for meta grids which may be useful.

• Write a meta grid which, given an affine grid with a parametrized boundary, yields an isoparametric approximation of the boundary. Some initial work exists; ask Oliver Sander for details.