branches/exact/examples/extra/irregular.cc

   1 // Irregular packing 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=-6,x_max=6;
  12 const double y_min=-6,y_max=6;
  13 const double z_min=-3,z_max=9;
  14
  15 // Golden ratio constants
  16 const double Phi=0.5*(1+sqrt(5.0));
  17 const double phi=0.5*(1-sqrt(5.0));
  18
  19 // Set up the number of blocks that the container is divided
  20 // into.
  21 const int n_x=5,n_y=5,n_z=5;
  22
  23 // Create a wall class that, whenever called, will replace the Voronoi cell
  24 // with a prescribed shape, in this case a dodecahedron
  25 class wall_initial_shape : public wall {
  26         public:
  27                 wall_initial_shape() {
  28
  29                         // Create a dodecahedron
  30                         v.init(-2,2,-2,2,-2,2);
  31                         v.plane(0,Phi,1);v.plane(0,-Phi,1);v.plane(0,Phi,-1);
  32                         v.plane(0,-Phi,-1);v.plane(1,0,Phi);v.plane(-1,0,Phi);
  33                         v.plane(1,0,-Phi);v.plane(-1,0,-Phi);v.plane(Phi,1,0);
  34                         v.plane(-Phi,1,0);v.plane(Phi,-1,0);v.plane(-Phi,-1,0);
  35                 };
  36                 bool point_inside(double x,double y,double z) {return true;}
  37                 bool cut_cell(voronoicell &c,double x,double y,double z) {
  38
  39                         // Set the cell to be equal to the dodecahedron
  40                         c=v;
  41                         return true;
  42                 }
  43                 bool cut_cell(voronoicell_neighbor &c,double x,double y,double z) {
  44
  45                         // Set the cell to be equal to the dodecahedron
  46                         c=v;
  47                         return true;
  48                 }
  49         private:
  50                 voronoicell v;
  51 };
  52
  53 int main() {
  54
  55         // Create a container with the geometry given above. This is bigger
  56         // than the particle packing itself.
  57         container con(x_min,x_max,y_min,y_max,z_min,z_max,n_x,n_y,n_z,
  58                         false,false,false,8);
  59
  60         // Create the "initial shape" wall class and add it to the container
  61         wall_initial_shape(wis);
  62         con.add_wall(wis);
  63
  64         // Import the irregular particle packing
  65         con.import("pack_irregular");
  66
  67         // Save the particles and Voronoi cells in POV-Ray format
  68         con.draw_particles_pov("irregular_p.pov");
  69         con.draw_cells_pov("irregular_v.pov");
  70 }