From 04be75518e4f651ed9290fe646bac7320d38d763 Mon Sep 17 00:00:00 2001 From: jthorn Date: Wed, 26 Mar 2003 16:50:27 +0000 Subject: document N_zones_per_right_angle parameter git-svn-id: http://svn.einsteintoolkit.org/cactus/EinsteinAnalysis/AHFinderDirect/trunk@1026 f88db872-0e4f-0410-b76b-b9085cfa78c5 --- doc/documentation.tex | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) (limited to 'doc') diff --git a/doc/documentation.tex b/doc/documentation.tex index 9d0bf66..d90dbf7 100644 --- a/doc/documentation.tex +++ b/doc/documentation.tex @@ -908,6 +908,38 @@ excision. This feature is controlled by the following parameteters: as registered with the \thorn{SpaceMask} thorn. \end{description} +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +\subsection{Other Parameters} + +\begin{description} +\item[\code{N\_zones\_per\_right\_angle[}$n$\code{]}] +\mbox{}\\ + This parameter sets the angular resolution used to compute + each patch. The units are the number of angular grid zones + per right angle. The default is 18, \ie{} a 5~degree angular + resolution. There's no problem with this parameter varying + from one horizon to another, but for simplicity it should be + even.%%% +\footnote{%%% + More precisely, it {\em must\/} be even for + any horizon whose patch system type is anything + other than {\tt "full sphere"}. See the comments + in {\tt param.ccl} for further information.%%% + }%%% + +{} For any horizon which is close to spherical about its + local coordinate origin, you can lower this parameter to make + \thorn{AHFinderDirect} run faster (typical run-times scale + roughly as the cube of this parameter); 6~is about the + minimum reasonable value. + + For any horizon which is highly non-spherical about its + local coordinate origin, you can raise this parameter to + get better resolution; 30~should be enough for even a + highly non-spherical horizon. +\end{description} + %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% \section{Accuracy} -- cgit v1.2.3