DUNE Grid 1.0 - Release notes

Changes to Previous Releases

Since this is the very first release there are no changes that we can list. But here is a short list of features that the DUNE 1.0 release provides.

• Six different Grid Implementations:
  • SGrid: A structured grid in n space dimensions
  • YaspGrid: A structured parallel grid in n space dimensions
  • UGGrid: The grid manager of the UG toolbox
  • AlbertaGrid: The grid manager of the Alberta toolbox
  • OneDGrid: A sequential locally adaptive grid in one space dimension
  • ALUSimplexGrid, ALUCubeGrid: A hexahedral, tetrahedral, and triangular grid with nonconforming refinement including parallelization with dynamic load-balancing.


• Quadrature Formulas
  • Quadrature rules for all common element types
  • Rules for hypercubes up to order 19, for simplices up to order 12


• Input/Output
  • Visualization using GRAPE
  • Output in Data Explorer format
  • Reading and writing in the AmiraMesh format
  • Reading grid files in the grid independent Dune grid format DGF
  • Reading simplex grids through DGF constructed using the tools Tetgen/Triangle (http://tetgen.berlios.de, http://www.cs.cmu.edu/~quake/triangle.html)
  • Subsampling of high-order functions
  • Write grids and data in the format of the visualization toolkit (vtk)

Tested Platforms

The DUNE core developers have tested DUNE on the following platforms.

• Debian Linux Sarge and Etch, using mpich/lam and gcc (3.4, 4.0, 4.1)
• Gentoo Linux, using openmpi/mpich and gcc (3.4, 4.0, 4.1)
• HP XC Version 3.0/SFS 2.1 using gcc (3.4 ,4.0)
• SuSE Linux 10.x using gcc

We have also gotten reports of successful installations on various flavours of Mac OSX.

Known Issues

Here is an (incomplete) list of things that we know not to work in DUNE 1.0.

Issues Applying to all modules

• config.h is needed as first include in all applications
• Out of source builds are not possible right now.
• The build system only recognizes dependendies on a fixed set of known modules. Besides the core Dune modules these are dune-disc, dune-fem, and dune-subgrid.
• The build system does not work with Solaris make. Please use GNU make instead.
• DUNE doesn't install on Windows platforms, not even using CygWin.
• So far DUNE has not been developed with thread-safety in mind, and you're probably bound for trouble if you try multi-threaded code.

Issues of dune-grid

• AlbertaGrid:

  • LevelIntersectionIterator not working correctly and therefore LevelIterators and LevelIntersectionIterator disabled.
  • AlbertaGrid only implemented for dimension = dimensionworld
  • AlbertaGrid only implemented for dimension = 2,3
  • AlbertaGrid cannot be used with different dimensions in one program, i.e. a 2d grid and a 3d grid.
  • AlbertaGrid not usable for parallel computations

• ALUCubeGrid:

  • only implemented for dimension 3.

• ALUSimplexGrid:

  • implemented for dimension 2 and 3
  • only 3d version usable for parallel computations

• ALUConformGrid:

  • only implemented for dimension 2
  • not usable for parallel computations

• SGrid:

  • for debugging only since SGrid is not working as fast as YaspGrid.
  • not usable in parallel computations
  • insufficient support of boundary ids

• YaspGrid:

  • YaspGrid does not work in 1d.
  • SubEntities only supported for codimension = dimension, i.e. Vertices
  • The left lower corners always is the origin 0
  • insufficient support of boundary ids

• UGGrid:

  • not usable for parallel computations yet
  • SubEntities only supported for codimension = dimension, i.e. Vertices
  • Ids not supported for all sub entity types
  • insufficient support of boundary ids

• OneDGrid:

  • not usable for parallel computations
  • adaptation cycle interface not fully supported (see flyspray task #324)

• DGFParser

  • Only single element type conform initial grids are supported

• VTKWriter:

  • binary appended mode will not work on 64 bit machine

Not to mention all the open bugs there are!