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#include <iostream>
#include <fstream>
using namespace std;
namespace nglib {
#include <nglib.h>
}
int main (int argc, char ** argv)
{
using namespace nglib;
cout << "Netgen Testing" << endl;
if (argc < 2)
{
cerr << "use: ng_vol filename" << endl;
return 1;
}
Ng_Mesh * mesh;
Ng_Init();
// creates mesh structure
mesh = Ng_NewMesh ();
int i, np, nse, ne;
double point[3];
int trig[3], tet[4];
// reads surface mesh from file
ifstream in(argv[1]);
in >> np;
cout << "Reading " << np << " points..."; cout.flush();
for (i = 1; i <= np; i++)
{
in >> point[0] >> point[1] >> point[2];
Ng_AddPoint (mesh, point);
}
cout << "done" << endl;
in >> nse;
cout << "Reading " << nse << " faces..."; cout.flush();
for (i = 1; i <= nse; i++)
{
in >> trig[0] >> trig[1] >> trig[2];
Ng_AddSurfaceElement (mesh, NG_TRIG, trig);
}
cout << "done" << endl;
// generate volume mesh
Ng_Meshing_Parameters mp;
mp.maxh = 1e6;
mp.fineness = 1;
mp.secondorder = 0;
cout << "start meshing" << endl;
Ng_GenerateVolumeMesh (mesh, &mp);
cout << "meshing done" << endl;
// volume mesh output
np = Ng_GetNP(mesh);
cout << "Points: " << np << endl;
for (i = 1; i <= np; i++)
{
Ng_GetPoint (mesh, i, point);
cout << i << ": " << point[0] << " " << point[1] << " " << point[2] << endl;
}
ne = Ng_GetNE(mesh);
cout << "Elements: " << ne << endl;
for (i = 1; i <= ne; i++)
{
Ng_GetVolumeElement (mesh, i, tet);
cout << i << ": " << tet[0] << " " << tet[1]
<< " " << tet[2] << " " << tet[3] << endl;
}
Ng_SaveMesh(mesh,"test.vol");
return 0;
}
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