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Name

falcon - Convert falcON HDF5 snapshots to NEMO snapshots

Synopsis

falcon in=infile out=outfile [parameter=value]

Description

This program convert the HDF5 based falcON(1NEMO) snapshot format into the NEMO snapshot(5NEMO) format. It is still under development, see CAVEATS below.

Parameters

The following parameters are recognized in order; they may be given in any order if the keyword is also given. Use --help to confirm this man page is up to date.
in=
Input falcON(5NEMO) snapshot filename. stdin is supported by giving the value in=-. No default.
out=
Output snapshot(5NEMO) filename. No default.
type=
Particle type to select for conversion. Only "std" has been tested. [Default: std]

Examples


$ falcon sim32.h5  - | tsf -
char History[30] "falcon sim32.h5 - VERSION=0.3"
set SnapShot
  set Parameters
    int Nobj 32 
    double Time 0.00000 
  tes
  set Particles
    int CoordSystem 66306 
    float Mass[32] 0.0312500 0.0312500 0.0312500 0.0312500 0.0312500 
      0.0312500 0.0312500 0.0312500 0.0312500 0.0312500 0.0312500 
      . . .
    float Position[32][3] -1.30477 1.59788e-16 0.00000 -1.29043e-16 
      -0.702476 -0.405575 1.15331e-16 1.88349 1.08744 0.486825 
      . . .
    float Velocity[32][3] -7.22837e-33 -5.90241e-17 0.481969 0.403077 
      0.201539 0.116358 0.456809 0.228404 0.131869 0.155023 0.475764 
      . . .
    float Potential[32] -0.582861 -0.726016 -0.389024 -0.611265 
      -0.276467 -0.705942 -0.491554 -0.691435 -0.332174 -0.788165 
      . . .
    float Acceleration[32][3] 0.320830 -0.0112188 -0.0184059 
      -0.0932003 0.296048 0.227969 0.00853122 -0.126000 -0.0768895 
      . . .
  tes
tes

Caveats

It currently only handles the "std" particles, and only converts mass, pos, vel, pot, acc.

falcON support many IO fields, see file $FALCON/inc/fields.h. Currently 52 fields are supported and all except flag, aold, dlKo, talf are supported for I/O. Their I/O is done by giving the dataset the name associated with the field (3 or 4 letters wide, same as the field name in fieldbit).

All snapshots are converted, use csf(1NEMO) or snaptrim(1NEMO) to extract less.

A maximum number of particles (100,000) was hardcoded. It should be noted that H5T_STD_U32LE is stored for the number of particles, limiting the HDF data to 4,294,967,296 particles.

All real (float or double) values are converted to H5T_NATIVE_FLOAT

Does not convert the data history yet

There is no conversion tool from NEMO snapshot to falcon format.

See Also

snapprint(1NEMO) , tsf(1NEMO) , falcON(5NEMO) , snapshot(5NEMO)

Files

src/nbody/io/falcon.c

Author

Peter Teuben

History


20-apr-2024    V0.1 Created        PJT

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