Table of Contents

Name

snaptrans - coordinate transformations of a snapshot

Synopsis

snaptrans [parameter=value]

Description

snaptrans will perform various coordinate transformations on a snapshot.

Currently one can only transform (cart,sph) and (cart,cyl) in the default coordinate ordening:

cart    x,y,z
cyl    rad,phi,z
sph    rad,phi,theta
Future enhancements will allow anything to anything, including reordering the coordinates.

Parameters

The following parameters are recognized in any order if the keyword is also given:
in=
Input snapshot filename (no default)
out=
Output snapshot filename (no default)
ctypei=
Input coordinate system. Any of: cart, sph, cyl can be given.
ctypeo=
Output coordinate system. See previous keyword.
projpi=
Input projection parameters, if needed. Default: none provided.
projpo=
Output projection parameters, if needed. Default: none provided.
scale=
Items to scale (phase,pos,vel,acc). By default all position related vectors are transformed, but you can select a subset this way.
ndim=
Force dimensionality, if it can be overriden. Default: NDIM, as compiled with the program.
times=t1:t2,t3:t4,...
Times to select snapshots from. A series of ranges can be given. Default: all.

Bugs

After a snapshot has been converted to anything else but cartesian, selection of body variables (e.g. see bodytrans(1NEMO) ) is still by their cartesian names, x, vx, ax, y etc.

Author

Peter Teuben

See Also

snapscale(1NEMO)

Update History


2-nov-94    V1.0 Created    Peter Teuben


Table of Contents