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martelsnap - convert Martel "pos-vel" dump files to snapshot
martelsnap
[parameter=value]
martelsnap converts a simple binary (fortran)
dump of phase space coordinates into a standard snapshot(5NEMO)
formatted
file. These files are amongst created by Hugo Martel’s software, although
are generally useful for any N-body code.
The following parameters
are recognized in any order if the keyword is also given:
- in=
- Input Martel
file. No default.
- out=
- Output snapshot file. No default.
- nbody=
- Max number
of particles. Default: 262144.
- headline=
- Random verbiage
- swap=t|f
- Swap
the real (float) numbers. This is needed if the data were produced on a
machine with a different endianism from where you are processing it. [Default:
f]
unfio(1NEMO)
, bswap(1NEMO)
http://xxx.lanl.gov/abs/astro-ph/9903210
Data format is a simple binary dump of the single precision coordinates
and velocities of all particles, the following snippet of fortran-77 code
would produce such files:
REAL x(N),y(N),z(N),vx(N),vy(N),vz(N),
OPEN(10,FILE=’posvel.dat’,STATUS=’new’,FORM=’unformatted’)
WRITE(10) x,y,z,vx,vy,vx
CLOSE(10)
Peter Teuben
19-Mar-99 V1.0 Created PJT
29-jun-01 V1.1 added swap= PJT
1-jul-01 V1.1a major bug: posvel matrix was never transposed... PJT
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