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quadforce - quadrupole-order force calculation of an N-body system. 
quadforce
in=snapshot [parameter=value] ... 
quadforce computes a quadrupole-order
force calculation of a snapshot N-body system. (see also quadcode(1NEMO)
).
The  output can be either in the form of the snapshot, or a table, in 
which case quadrupole-oder forces can be inserted in other snapshots (see
quadinter(1NEMO)
). 
The following parameters are recognized in
any order if the keyword is also given: 
- in=snaphot 
- Input file with N-body
snapshot. No default. 
- out= 
- Optional snapshot output file with forces and
potentials. This output is optional. 
- quad= 
- Output file with quadrupole field
tables. This output is optional. 
- eps_r= 
- Radial softening parameter. [Default:
0.05] 
- eps_t= 
- Tangential softening parameter. [Default: 0.07] 
The
code has a hardcoded maximum number of particles, through the macro MBODY.
(currently 4096). If more are needed, it needs to be recompiled. See comments
in quadcode(1NEMO)
 
Joshue Barnes 
quadcode(1NEMO)
, quadinter(1NEMO)
4-mar-89    V1.0 Old version    JEB
12-nov-91    V1.1 FOr new nemo V2.    PJT
6-may-92    V1.1a man page written, added some warnings    PJT
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