1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
|
// Irregular packing 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=-6,x_max=6;
const double y_min=-6,y_max=6;
const double z_min=-3,z_max=9;
// Golden ratio constants
const double Phi=0.5*(1+sqrt(5.0));
const double phi=0.5*(1-sqrt(5.0));
// Set up the number of blocks that the container is divided
// into.
const int n_x=5,n_y=5,n_z=5;
// Create a wall class that, whenever called, will replace the Voronoi cell
// with a prescribed shape, in this case a dodecahedron
class wall_initial_shape : public wall {
public:
wall_initial_shape() {
// Create a dodecahedron
v.init(-2,2,-2,2,-2,2);
v.plane(0,Phi,1);v.plane(0,-Phi,1);v.plane(0,Phi,-1);
v.plane(0,-Phi,-1);v.plane(1,0,Phi);v.plane(-1,0,Phi);
v.plane(1,0,-Phi);v.plane(-1,0,-Phi);v.plane(Phi,1,0);
v.plane(-Phi,1,0);v.plane(Phi,-1,0);v.plane(-Phi,-1,0);
};
bool point_inside(double x,double y,double z) {return true;}
bool cut_cell(voronoicell &c,double x,double y,double z) {
// Set the cell to be equal to the dodecahedron
c=v;
return true;
}
bool cut_cell(voronoicell_neighbor &c,double x,double y,double z) {
// Set the cell to be equal to the dodecahedron
c=v;
return true;
}
private:
voronoicell v;
};
int main() {
// Create a container with the geometry given above. This is bigger
// than the particle packing itself.
container con(x_min,x_max,y_min,y_max,z_min,z_max,n_x,n_y,n_z,
false,false,false,8);
// Create the "initial shape" wall class and add it to the container
wall_initial_shape(wis);
con.add_wall(wis);
// Import the irregular particle packing
con.import("pack_irregular");
// Save the particles and Voronoi cells in POV-Ray format
con.draw_particles_pov("irregular_p.pov");
con.draw_cells_pov("irregular_v.pov");
}
|
