netgen/libsrc/interface/writeelmer.cpp

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2009-01-13 04:40:13 +05:00
//
// Write Elmer file
//
//
#include <mystdlib.h>
#include <myadt.hpp>
#include <linalg.hpp>
#include <csg.hpp>
#include <meshing.hpp>
#include <sys/stat.h>
namespace netgen
{
#include "writeuser.hpp"
void WriteElmerFormat (const Mesh &mesh,
const string &filename)
{
cout << "write elmer mesh files" << endl;
int np = mesh.GetNP();
int ne = mesh.GetNE();
int nse = mesh.GetNSE();
int i, j;
char str[200];
int inverttets = mparam.inverttets;
int invertsurf = mparam.inverttrigs;
#ifdef WIN32
char a[256];
sprintf( a, "mkdir %s", filename.c_str() );
system( a );
#else
int rc = mkdir(filename.c_str(), S_IRWXU|S_IRWXG);
#endif
sprintf( str, "%s/mesh.header", filename.c_str() );
ofstream outfile_h(str);
sprintf( str, "%s/mesh.nodes", filename.c_str() );
ofstream outfile_n(str);
sprintf( str, "%s/mesh.elements", filename.c_str() );
ofstream outfile_e(str);
sprintf( str, "%s/mesh.boundary", filename.c_str() );
ofstream outfile_b(str);
// fill hashtable
INDEX_3_HASHTABLE<int> face2volelement(ne);
for (i = 1; i <= ne; i++)
{
const Element & el = mesh.VolumeElement(i);
INDEX_3 i3;
int k, l;
for (j = 1; j <= 4; j++) // loop over faces of tet
{
l = 0;
for (k = 1; k <= 4; k++)
if (k != j)
{
l++;
i3.I(l) = el.PNum(k);
}
i3.Sort();
face2volelement.Set (i3, i);
}
}
// outfile.precision(6);
// outfile.setf (ios::fixed, ios::floatfield);
// outfile.setf (ios::showpoint);
outfile_h << np << " " << ne << " " << nse << "\n";
outfile_h << "2" << "\n";
outfile_h << "303 " << nse << "\n";
outfile_h << "504 " << ne << "\n";
for (i = 1; i <= np; i++)
{
const Point3d & p = mesh.Point(i);
outfile_n << i << " -1 ";
outfile_n << p.X() << " ";
outfile_n << p.Y() << " ";
outfile_n << p.Z() << "\n";
}
for (i = 1; i <= ne; i++)
{
Element el = mesh.VolumeElement(i);
if (inverttets) el.Invert();
sprintf( str, "5%02d", (int)el.GetNP() );
outfile_e << i << " " << el.GetIndex() << " " << str << " ";
for (j = 1; j <= el.GetNP(); j++)
{
outfile_e << " ";
outfile_e << el.PNum(j);
}
outfile_e << "\n";
}
for (i = 1; i <= nse; i++)
{
Element2d el = mesh.SurfaceElement(i);
if (invertsurf) el.Invert();
sprintf( str, "3%02d", (int)el.GetNP() );
{
INDEX_3 i3;
for (j = 1; j <= 3; j++) i3.I(j) = el.PNum(j);
i3.Sort();
int elind = face2volelement.Get(i3);
outfile_b << i << " " << mesh.GetFaceDescriptor(el.GetIndex()).BCProperty() <<
" " << elind << " 0 " << str << " ";
}
for (j = 1; j <= el.GetNP(); j++)
{
outfile_b << " ";
outfile_b << el.PNum(j);
}
outfile_b << "\n";
}
}
}