From 99a9e0e6be669f2f2be36ef9a8b0d3231ee63ad7 Mon Sep 17 00:00:00 2001
From: sjplimp <sjplimp@f3b2605a-c512-4ea7-a41b-209d697bcdaa>
Date: Tue, 7 Jan 2014 01:09:21 +0000
Subject: [PATCH] git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@11148
 f3b2605a-c512-4ea7-a41b-209d697bcdaa

---
 doc/molecule.html | 8 ++++++++
 doc/molecule.txt  | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/doc/molecule.html b/doc/molecule.html
index d29fc0d872..f2fc5f694b 100644
--- a/doc/molecule.html
+++ b/doc/molecule.html
@@ -74,6 +74,14 @@ consists of a set of point particles.  You typically only need to
 specify these values for a rigid body consisting of overlapping
 finite-size particles.
 </P>
+<P>The mass and center-of-mass coordinates (Xc,Yc,Zc) are
+self-explanatory.  The 6 moments of inertia (ixx,iyy,izz,ixy,ixz,iyz)
+should be the values consistent with the current orientation of the
+rigid body around its center of mass.  The values are with respect to
+the simulation box XYZ axes, not with respect to the prinicpal axes of
+the rigid body itself.  LAMMPS performs the latter calculation
+internally.
+</P>
 <P>These are the allowed section keywords for the body of the file.
 </P>
 <UL><LI><I>Coords, Types, Charges, Diameters, Masses</I> = atom-property sections 
diff --git a/doc/molecule.txt b/doc/molecule.txt
index 407813fed5..7a609a7674 100644
--- a/doc/molecule.txt
+++ b/doc/molecule.txt
@@ -71,6 +71,14 @@ consists of a set of point particles.  You typically only need to
 specify these values for a rigid body consisting of overlapping
 finite-size particles.
 
+The mass and center-of-mass coordinates (Xc,Yc,Zc) are
+self-explanatory.  The 6 moments of inertia (ixx,iyy,izz,ixy,ixz,iyz)
+should be the values consistent with the current orientation of the
+rigid body around its center of mass.  The values are with respect to
+the simulation box XYZ axes, not with respect to the prinicpal axes of
+the rigid body itself.  LAMMPS performs the latter calculation
+internally.
+
 These are the allowed section keywords for the body of the file.
 
 {Coords, Types, Charges, Diameters, Masses} = atom-property sections