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snapplot3 - display an N-body snapshot file in a 3-panel XY-YZ-XZ display
snapplot3 insnap-file [parametervalue] ...
snapplot3 plots
a sequence of frames from a N-body snapshot file on a yapp(5NEMO)
display
device, and plots 3 panels per page in the special cube-foldout XY-ZY-XZ:
the lower left box contains the XY view, to its right the ZY view, and
to the top the XZ view. It is possible to make the XY box a different size,
at the cost (or benefit) of the other ZY and XZ views.
This program is derived
from snapplot(1NEMO)
and therefore shares many of its keywords.
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=snap-file
- Input data is read from snap-file, which must
be in snapshot format.
- times=time-range
- Only plot frames with time values
within time-range, which is of the form, eg, "1.0:1.5,2.5,3.0". The default is
"all".
- xvar=x-expression
- The value of x-expression is plotted along the X
axis. x-expression is a real-valued C language expression over the real values
x, y, z, vx, vy, vz, phi, t, and the integer value i. The default is x.
- xlabel=x-axis-label
- Label for the X axis. The default is the expression given for xvar.
- xrange=x-axis-range
- Range of values for the X axis, specified either as a single number (in
which case the lower bound is zero) or a pair of numbers separated by a
colon. The default range is -2.0:2.0.
- yvar=y-expression
- See above. The default
is y.
- ylabel=y-axis-label
- yrange=y-axis-range
- zvar=z-expression
- See above. The
default is z.
- zlabel=z-axis-label
- zrange=z-axis-range
- visib=expression
- Determines
the visibility of particles. expression is a integer expression in the above
variables; only points with non-zero values are plotted. Particles are plotted
in order of their visib, e.g. visib=1 are plotted before visib=2, thus this
keyword can be used to re-arrange the plotting order on screen (useful if
colors are used). The default is 1.
- psize=expression
- Determines the point
type and size. expression is a real expression in the above variables; zero
means plot a point, positive (negative) means plot a circle (cross) with
size controled by absolute value. The default is 0.
- color=expression
- Determines
the point color. expression is a real expression in the above variables;
values between 0 and 1 produce a sequence of saturated colors starting
with red, running through the spectrum, and wrapping back to red. The default
is 0.
- crange=color-range
- Range of colors that should be mapped. Below and
above these ranges the yapp(3NEMO)
plotting layer may determine the visibility
of the points. The default range is 0:1.
Although the default is
3 equal size panels, for a detailed look at disk galaxies the following
example gives more resolution in the Z direction, but a larger view of
the XY plane:
% mkexpdisk out=disk1 nbody=10000
% gyrfalcON in=disk1 out=disk1.out tstop=1 step=0.1 (takes 8" on a
1.6GHz class pentium4)
% snapplot3 disk1.out xbox=1:16 ybox=1:16 zbox=16.5:19.5 zrange=-0.2:0.2 nzticks=3
glnemo2(1NEMO)
, snaps2plot(1NEMO)
, snapplot(1NEMO)
, bodytrans(1NEMO)
,
snapshot(5NEMO)
.
Peter Teuben
2-nov-05 V0.1 - initial version written PJT
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