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snapcenterp - find center of a snapshot with potential minimum search
snapcenterp in=snap-file [parameter=value] ...
finds the potential center of a snapshot using the iterative Cruz method.
This program is in development, for example, no output file is written.
See also snapcenter(1NEMO)
parameters are recognized; they may be given in any order.
data is read from snap-file, which must be in snapshot format. No default.
times=time-range Only data frames with time values within time-range, which
is of the form, eg, "1.0:1.5,2.5,3.0", will be translated. [Default: all].
- The value of expression is used to compute the centroid. expression is a
real-valued C language expression over the real values x, y, z, vx, vy,
vz, phi, m, t, and the integer value i. [Default m].
- Report the
center of mass coordinates. These are 2*NDIM numbers, position and velocity,
of the new center of mass in the old coordinates. If you want to use snapcenter
in a pipe, you need to reset report=f, since both standard output and filestruct
output will get merged, and become illegable for the next program in the
pipe. [Default: t].
- Write output center of mass (COM) as a single
body with total mass and COM coordinates as computed from weight=.**not
active** [Default: f].
- Softening length, in length units used in the
- Convergence stop criterion. This number is the length
of the difference vector of two subsequent iterations of the potential
center, and is thus in units of those of the snapshot. [0.001]
of particles to consider in the potential finding algorithm [0.5] **currently
all particles used**
- Maximum number of iterations to use. If the eta
stop criterion did not converge, this criterion will stop the iterations.
Cruz., F et al. - (2002) Rev.Mex.de Astr.y Astr. 38, 225
1-apr-06 0.1 Created in Rembrandt Hotel PJT
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