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Name

snapplot3 - display an N-body snapshot file in a 3-panel XY-YZ-XZ display

Synopsis

snapplot3 insnap-file [parametervalue] ...

Description

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.

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=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.

Example

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

See Also

glnemo2(1NEMO) , snaps2plot(1NEMO) , snapplot(1NEMO) , bodytrans(1NEMO) , snapshot(5NEMO) .

Author

Peter Teuben

History


2-nov-05    V0.1 - initial version written      PJT

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