git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@8578 f3b2605a-c512-4ea7-a41b-209d697bcdaa

doc/compute_contact_atom.txt

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+"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c
+
+:link(lws,http://lammps.sandia.gov)
+:link(ld,Manual.html)
+:link(lc,Section_commands.html#comm)
+
+:line
+
+compute contact/atom command :h3
+
+[Syntax:]
+
+compute ID group-ID contact/atom :pre
+
+ID, group-ID are documented in "compute"_compute.html command
+contact/atom = style name of this compute command :ul
+
+[Examples:]
+
+compute 1 all contact/atom :pre
+
+[Description:]
+
+Define a computation that calculates the number of contacts
+for each atom in a group.
+
+The contact number is defined for finite-size spherical particles as
+the number of neighbor atoms which overlap the central particle,
+meaning that their distance of separation is less than or equal to the
+sum of the radii of the two particles.
+
+The value of the contact number will be 0.0 for atoms not in the
+specified compute group.
+
+[Output info:]
+
+This compute calculates a per-atom vector, whose values can be
+accessed by any command that uses per-atom values from a compute as
+input.  See "Section_howto 15"_Section_howto.html#howto_15 for an
+overview of LAMMPS output options.
+
+The per-atom vector values will be a number >= 0.0, as explained
+above.
+
+[Restrictions:]
+
+This compute requires that atoms store a radius as defined by the
+"atom_style sphere"_atom_style.html command.
+
+[Related commands:]
+
+"compute coord/atom"_compute_coord_atom.html
+
+[Default:] none