branches/dynamic/examples/walls/tetrahedron.cc

   1 // Voronoi calculation example code
   2 //
   3 // Author   : Chris H. Rycroft (LBL / UC Berkeley)
   4 // Email    : chr@alum.mit.edu
   5 // Date     : October 19th 2007
   6
   7 #include "voro++.cc"
   8
   9 // Set up constants for the container geometry
  10 const double x_min=-2,x_max=2;
  11 const double y_min=-2,y_max=2;
  12 const double z_min=-2,z_max=2;
  13
  14 // Set up the number of blocks that the container is divided
  15 // into
  16 const int n_x=7,n_y=7,n_z=14;
  17
  18 // Set the number of particles that are going to be randomly
  19 // introduced
  20 const int particles=64;
  21
  22 // This function returns a random double between 0 and 1
  23 double rnd() {return double(rand())/RAND_MAX;}
  24
  25 int main() {
  26         int i=0;
  27         double x,y,z;
  28
  29         // Create a container with the geometry given above, and make it
  30         // non-periodic in each of the three coordinates. Allocate space for
  31         // 8 particles within each computational block.
  32         container con(x_min,x_max,y_min,y_max,z_min,z_max,n_x,n_y,n_z,
  33                         false,false,false,8);
  34
  35         // Add a cylindrical wall to the container
  36         wall_plane p1(1,1,1,1);con.add_wall(p1);
  37         wall_plane p2(-1,-1,1,1);con.add_wall(p2);
  38         wall_plane p3(1,-1,-1,1);con.add_wall(p3);
  39         wall_plane p4(-1,1,-1,1);con.add_wall(p4);
  40
  41         while(i<particles) {
  42                 x=x_min+rnd()*(x_max-x_min);
  43                 y=y_min+rnd()*(y_max-y_min);
  44                 z=z_min+rnd()*(z_max-z_min);
  45                 if (con.point_inside(x,y,z)) {
  46                         con.put(i,x,y,z);i++;
  47                 }
  48         }
  49
  50         // Output the particle positions and the Voronoi cells in Gnuplot and
  51         // POV-Ray formats
  52         con.draw_particles("tetrahedron_p.gnu");
  53         con.draw_cells_gnuplot("tetrahedron_v.gnu");
  54         con.draw_particles_pov("tetrahedron_p.pov");
  55         con.draw_cells_pov("tetrahedron_v.pov");
  56 }