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lammps/lib/voronoi/examples/basic/README
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Voro++ basic example codes
==========================
These programs demonstrate some basic usage of the Voro++ library.
1. single_cell.cc introduces the basic voronoicell class. It creates a simple
cell by cutting it with a number of random planes. It outputs the cell to a file
called single_cell.gnu, which can be visualized in gnuplot using the following
commands:
set style data lines
splot 'single_cell.gnu'
2. platonic.cc uses the voronoicell class to make the five Platonic solids,
which are output to files that can be visualized in gnuplot.
3. random_points.cc introduces the container class, for holding particle
positions in a box. After creating a container, it adds a small number of
random points to the box. It then calculates the sum of the volumes of the
Voronoi cells, and compares it to the container volume - since the cells should
perfectly partition the container, these two should be identical to within
numerical accuracy. The code then saves the particle positions to
"random_points_p.gnu" and the Voronoi cells to "random_points_v.gnu". These can
be visualized in gnuplot using the command:
splot 'random_points_p.gnu' u 2:3:4 with points, 'random_points_v.gnu' with lines
4. import.cc demonstrates the ability of the code to import a list of particles
from a text file. The code imports a text file called 'pack_ten_cube' which
contains a thousand particles in a cube of side length 10. Each line of this
file has the form:
<Numerical ID> <x coordinate> <y coordinate> <z coordinate>
The code imports the particles into the container, and then saves the particles
and Voronoi cells in gnuplot and POV-Ray formats. To visualize the particles in
gnuplot, use the command:
splot 'pack_ten_cube' u 2:3:4 with points, 'pack_ten_cube.gnu' with lines
To create a POV-Ray rendering of the particles, the scene header file
import.pov must be used, which includes the output from the program. To render
an 800x600 image with antialiasing, use the command:
povray +W800 +H600 +A0.01 +Oimport.png import.pov
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