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snapsphere - copy a phase space sphere of particles from an N-body system
snapsphere in=snap_in out=snap_out [parameters=values...]
snapsphere
copies all particles from an N-body system which are within a radial shell,
specified by its center and two radii, in position as well as velocity
position space.
The following parameters are reckognized in any
order if the keyword is also given:
- in=snap_in
- Input data is read from
snap_in, which must be in standard snapshot(5NEMO)
format [no default].
- out=snap_out
- Copied output data is written to snap_out, which will also
be in snapshot(5NEMO)
format [No default].
- rcen=x,y,z
- The center of the
sphere in space coodinates. [default:0,0,0].
- vcen=vx,vy,vz
- The center of
the sphere in velocity coodinates. [default:0,0,0].
- rrad=[rmin:]rmax
- rmin
and rmax are the inner and outer radius of the shell in space coordinates.
If only one radius is given, it is assumed to be the outer radius of the
sphere. [default:0:infinity].
- vrad=[vrmin:]vrmax
- vmin and vmax are the inner
and outer radius of the shell in velocity coordinates. If only one radius
is given, it is assumed to be the outer radius of the sphere. [default:0:infinity].
- times=time-ranges
- Only snapshots with time values within times-ranges, which
is of the form ts[:te],..., will be copied. [default: all].
Peter Teuben
Does not handle subsequent multiple snashots when they are larger than
the first one.
~/src/pjt/nbody snapsphere.c snapsphere.1
8-Apr-87 Version 1.0: created PJT
22-Apr-87 V1.1: headline bug PJT
xx-xxx-87 V1.2: keyword ’select’ added PJT
19-Jun-87 V1.3: ’cs’ was not read in PJT
1-Jul-87 V1.4: time check PJT
6-jun-88 V1.6: new filestruct PJT
1-aug-88 V1.6a: bug in mass transfer PJT
20-dec-88 V1.7: shells instead of spheres PJT
14-feb-89 V1.7a: bug removed - get_now snap PJT
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