# Major Unimplemented Features

These are listed approximately in order by priority, along with estimates of when each feature is likely to be completed, if known.

- Mesh anisotropy. There are two (possibly) related issues here: anisotropy meshing and anisotropic mesh refinement.

  - Anisotropic refinement, beginning with anisotropic tri/tet meshes and moving eventually to anisotropic mixed-element meshes. (2009 thesis completion for 2D; 3D currently in progress)
  - Mixed-element meshing, including quadrilaterals in two dimensions and pyramids, prisms, and hexahedra in three dimensions. (2D: possibly as early as 2010) Ideally, we'd like to be able to produce mixed-element meshes after anisotropic refinement as well.
- Parallelism. We are currently working to parallelize GRUMMP, including both its internal operations and an API for parallel access to data structures (this is part of the ITAPS project).