git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@14950 f3b2605a-c512-4ea7-a41b-209d697bcdaa

doc/html/_sources/fix_lineforce.txt

@@ -0,0 +1,60 @@
+.. index:: fix lineforce
+
+fix lineforce command
+=====================
+
+Syntax
+""""""
+
+.. parsed-literal::
+
+   fix ID group-ID lineforce x y z
+
+* ID, group-ID are documented in :doc:`fix <fix>` command
+* lineforce = style name of this fix command
+* x y z = direction of line as a 3-vector
+
+Examples
+""""""""
+
+.. parsed-literal::
+
+   fix hold boundary lineforce 0.0 1.0 1.0
+
+Description
+"""""""""""
+
+Adjust the forces on each atom in the group so that only the component
+of force along the linear direction specified by the vector (x,y,z)
+remains.  This is done by subtracting out components of force in the
+plane perpendicular to the line.
+
+If the initial velocity of the atom is 0.0 (or along the line), then
+it should continue to move along the line thereafter.
+
+Restart, fix_modify, output, run start/stop, minimize info
+""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+No information about this fix is written to :doc:`binary restart files <restart>`.  None of the :doc:`fix_modify <fix_modify>` options
+are relevant to this fix.  No global or per-atom quantities are stored
+by this fix for access by various :ref:`output commands <howto_15>`.  No parameter of this fix can
+be used with the *start/stop* keywords of the :doc:`run <run>` command.
+
+The forces due to this fix are imposed during an energy minimization,
+invoked by the :doc:`minimize <minimize>` command.
+
+Restrictions
+""""""""""""
+ none
+
+Related commands
+""""""""""""""""
+
+:doc:`fix planeforce <fix_planeforce>`
+
+**Default:** none
+
+
+.. _lws: http://lammps.sandia.gov
+.. _ld: Manual.html
+.. _lc: Section_commands.html#comm