diff options
| author | jthorn <jthorn@c78560ca-4b45-4335-b268-5f3340f3cb52> | 2002-05-07 13:09:29 +0000 |
|---|---|---|
| committer | jthorn <jthorn@c78560ca-4b45-4335-b268-5f3340f3cb52> | 2002-05-07 13:09:29 +0000 |
| commit | 7bef905d9fce5e98ac9f457bedffcafa61fa0255 (patch) | |
| tree | 6a17ee4954de6bba4d81e6e6cdfc926052ec48a7 | |
| parent | dbdcaa49b82361571f6abc760f3eb7820acc1337 (diff) | |
Document a bug / missing feature pointed out by Peter Diener:
With the present code,
- Symmetries only work with CCTK_REAL grid functions;
they give wrong answers for other data types.
- Moreover, the current interface doesn't really give enough info
to properly handle complex grid functions.
git-svn-id: http://svn.cactuscode.org/arrangements/CactusBase/CartGrid3D/trunk@156 c78560ca-4b45-4335-b268-5f3340f3cb52
| -rw-r--r-- | doc/documentation.tex | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/doc/documentation.tex b/doc/documentation.tex index 86ace22..35e02b8 100644 --- a/doc/documentation.tex +++ b/doc/documentation.tex @@ -230,9 +230,18 @@ with the flesh. \section{Symmetries for Grid Functions} If your problem and initial data allow it, \verb|CartGrid3D| -allows you to enforce either an even or odd parity -symmetry condition for any grid functions at each -coordinate axis. For a function $\phi(x,y,z)$, +allows you to enforce even or odd parity for any grid function%%% +\footnote{%%% + Alas, with the present implementation only + {\tt CCTK\_REAL} grid functions work correctly; + all others give garbage results. This is a + bug, which should get fixed sometime or other\dots{} + Indeed, we haven't yet decided how complex grid + functions should be handled here. Contact + Peter Diener and/or Jonathan Thornburg if you + have ideas and/or want to help with this. + }%%% +{} at (across) each coordinate axis. For a function $\phi(x,y,z)$, even parity symmetry on the $x$-axis means $$ \phi(-x,y,z) = \phi(x,y,z) |