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lammps/lib/voro++/examples/walls/tetrahedron.cc
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// Tetrahedron example code
//
// Author : Chris H. Rycroft (LBL / UC Berkeley)
// Email : chr@alum.mit.edu
// Date : August 30th 2011
#include "voro++.hh"
using namespace voro;
// Set up constants for the container geometry
const double x_min=-2,x_max=2;
const double y_min=-2,y_max=2;
const double z_min=-2,z_max=2;
// Set up the number of blocks that the container is divided
// into
const int n_x=7,n_y=7,n_z=7;
// Set the number of particles that are going to be randomly
// introduced
const int particles=64;
// This function returns a random double between 0 and 1
double rnd() {return double(rand())/RAND_MAX;}
int main() {
int i=0;
double x,y,z;
// Create a container with the geometry given above, and make it
// non-periodic in each of the three coordinates. Allocate space for 8
// particles within each computational block.
container con(x_min,x_max,y_min,y_max,z_min,z_max,n_x,n_y,n_z,
false,false,false,8);
// Add four plane walls to the container to make a tetrahedron
wall_plane p1(1,1,1,1);con.add_wall(p1);
wall_plane p2(-1,-1,1,1);con.add_wall(p2);
wall_plane p3(1,-1,-1,1);con.add_wall(p3);
wall_plane p4(-1,1,-1,1);con.add_wall(p4);
// Randomly insert particles into the container, checking that they lie
// inside the tetrahedron
while(i<particles) {
x=x_min+rnd()*(x_max-x_min);
y=y_min+rnd()*(y_max-y_min);
z=z_min+rnd()*(z_max-z_min);
if (con.point_inside(x,y,z)) {
con.put(i,x,y,z);i++;
}
}
// Output the particle positions and the Voronoi cells in Gnuplot and
// POV-Ray formats
con.draw_particles("tetrahedron_p.gnu");
con.draw_cells_gnuplot("tetrahedron_v.gnu");
con.draw_particles_pov("tetrahedron_p.pov");
con.draw_cells_pov("tetrahedron_v.pov");
}
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