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gravsim0 - NEMO frontend for the GRAVSIM family of programs
gravsim0
[parameter=value]
gravsim0 is a NEMO frontend to run any of
the GRAVSIM family of programs, such that NEMO datafile are given, converted
on the fly to GRAVSIM format, the specified GRAVSIM integrator is run,
and output files in GRAVSIM format are converted back to NEMO format.
This
program works by writing a C-shell script gravsimpid, where pid is the
process ID (see getpid(3)
). This script is then executed via execl(3)
, and
kept in the current working directory.
Since this program uses the following
NEMO programs, they need to have been installed: stoa, 205-to-gdff, gdff-editor,
gravsim*, gdff-to-205 and atos.
The following parameters are recognized
in any order if the keyword is also given:
- in=
- Snapshot input filename.
No default.
- out=
- Snapshot output filename. No default.
- prog=
- GRAVSIM Program
to run. [Default: gravsim].
- clean=
- Clean up temp files? [Default: t].
- title=
- Title for the run [Default: not used].
- processors=
- Number of processors
that can be used [Default: 1].
- cells=
- Number of cells to be allocated
- split-number=
-
- start-time=
- Start time for run [Default: 0.0].
- end-time=
- Stop time for run [Default: 2.0].
- eps=
- Softening length [Default:
0.025].
- tol=
- Tolerance [Default: 1.0]
- data-step=
- Major Output of data
[Default: 0.25].
- report-step=
- Minor Output of energy etc. [Default: 0.03125].
- g-value=
- Gravitational constant [Default: 1.0].
- time-step=
- Integration
time step [Default: 0.03125].
gravsim(8GRAVSIM)
Peter Teuben,
Mark Bellon
This program has not been tested extensively, it also serves
as another example to bind existing N-body integrators into NEMO. The Aarseth
NBODY family of N-body integrators shows another method of doing the same
job.
usr/mbellon/gravsim/ Source tree for GRAVSIM package (env.var. GRAVSIM)
usr/pjt/nbody gravsim0.c
16-Jul-91 V0.0 document Created NEMO
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