trunk/examples/no_release/ghost_test.cc

   1 // Voronoi calculation example code
   2 //
   3 // Author   : Chris H. Rycroft (LBL / UC Berkeley)
   4 // Email    : chr@alum.mit.edu
   5 // Date     : August 30th 2011
   6
   7 #include "voro++.hh"
   8 using namespace voro;
   9
  10 // Set up constants for the container geometry
  11 const double x_min=-1,x_max=1;
  12 const double y_min=-1,y_max=1;
  13 const double z_min=-1,z_max=1;
  14 const double cvol=(x_max-x_min)*(y_max-y_min)*(x_max-x_min);
  15
  16 // Set up the number of blocks that the container is divided into
  17 const int n_x=6,n_y=6,n_z=6;
  18
  19 // Set the number of particles that are going to be randomly introduced
  20 const int particles=20;
  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;
  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         // eight particles within each computational block
  32         container_periodic_poly con(2,0.5,2,0,0,2,n_x,n_y,n_z,8);
  33
  34         // Randomly add particles into the container
  35         for(i=0;i<4;i++) {
  36                 x=x_min+rnd()*(x_max-x_min);
  37                 y=y_min+rnd()*(y_max-y_min);
  38                 z=z_min+rnd()*(z_max-z_min);
  39                 con.put(i,x,y,0,1);
  40         }
  41
  42         // Output the particle positions in gnuplot format
  43         con.draw_particles("ghost_test_p.gnu");
  44
  45         // Output the Voronoi cells in gnuplot format
  46         con.draw_cells_gnuplot("ghost_test_v.gnu");
  47
  48         // Open file for test ghost cell
  49         FILE *fp=safe_fopen("ghost_test_c.gnu","w");
  50         voronoicell c;
  51
  52         // Compute a range of ghost cells
  53 //      for(y=-3.5;y<3.5;y+=0.05) if(con.compute_ghost_cell(c,1,y,0,1))
  54 //              c.draw_gnuplot(1,y,0,fp);
  55
  56         // Compute a single ghost cell
  57         if(con.compute_ghost_cell(c,1.56,0.67,0,1)) c.draw_gnuplot(1.56,0.67,0,fp);
  58
  59         // Close ghost cell file
  60         fclose(fp);
  61
  62         // Draw the domain
  63         con.draw_domain_gnuplot("ghost_test_d.gnu");
  64 }