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Diffstat (limited to 'Carpet/doc/internals.tex')
| -rw-r--r-- | Carpet/doc/internals.tex | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/Carpet/doc/internals.tex b/Carpet/doc/internals.tex index 35b6666a9..44ebd0397 100644 --- a/Carpet/doc/internals.tex +++ b/Carpet/doc/internals.tex @@ -1,11 +1,11 @@ -% $Header: /home/eschnett/C/carpet/Carpet/Carpet/doc/internals.tex,v 1.1 2003/04/30 20:41:38 schnetter Exp $ +% $Header: /home/eschnett/C/carpet/Carpet/Carpet/doc/internals.tex,v 1.2 2003/05/02 14:24:14 schnetter Exp $ \documentclass{article} \begin{document} \title{Carpet under the hood} \author{Erik Schnetter \textless schnetter@uni-tuebingen.de\textgreater} -\date{$ $Date: 2003/04/30 20:41:38 $ $} +\date{$ $Date: 2003/05/02 14:24:14 $ $} \maketitle \tableofcontents @@ -645,7 +645,7 @@ subroutine restrict_3d_real8 -\section{Regridding, where and when} +\section{Regridding, how and where and when} The thorn \texttt{Carpet} provides a routine \texttt{RegisterRegridRoutine} where one can register a regridding @@ -707,13 +707,6 @@ subroutine restrict_3d_real8 -\section{TO DO} - - don't use symmetries or boundary conditions on finer grids; - coordinates on finer grids. - - - \section{Random ramblings} Carpet uses the STL, because the STL provides very useful container @@ -746,4 +739,14 @@ subroutine restrict_3d_real8 to extract from the core file a stack backtrace and the values of the local variables of the current stack frame. + Using symmetry boundary conditions such as octant mode is currently + still awkward in Carpet. There are several reasons for this: + \texttt{CarpetRegrid} does not know about symmetries, and hence + doesn't take them into account when choosing refinement regions. + The symmetry conditions on the finer grid might be different from + the conditions on the coarser grids, and the symmetry thorns cannot + cope with this, so this situation must be avoided: one cannot use + \texttt{avoid\_origin=yes}, because the finer grids all have + \texttt{avoid\_origin=no} due to the vertex-centred refinement. + \end{document} |