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// Write Chemnitz file format
#include <mystdlib.h>
#include <myadt.hpp>
#include <linalg.hpp>
#include <csg.hpp>
#include <meshing.hpp>
#include "writeuser.hpp"
namespace netgen
{
class POINT3D
{
public:
POINT3D () { };
double x, y, z;
};
class VOLELEMENT
{
public:
int domnr, p1, p2, p3, p4;
int faces[4];
VOLELEMENT ()
{ for (int i = 0; i < 4; i++) faces[i] = 0; }
};
class SURFELEMENT
{
public:
SURFELEMENT () { };
int snr, p1, p2, p3;
};
class FACE
{
public:
int p1, p2, p3;
int edges[3];
FACE ()
{ for (int i = 0; i < 3; i++) edges[i] = 0; }
};
class EDGE
{
public:
EDGE () { };
int p1, p2;
};
static NgArray<POINT3D> points;
static NgArray<VOLELEMENT> volelements;
static NgArray<SURFELEMENT> surfelements;
static NgArray<FACE> faces;
static NgArray<EDGE> edges;
void ReadFile (char * filename)
{
int i, n;
ifstream infile(filename);
char reco[100];
infile >> reco; // file format recognition
infile >> n; // number of surface elements
cout << n << " Surface elements" << endl;
for (i = 1; i <= n; i++)
{
SURFELEMENT sel;
infile >> sel.snr >> sel.p1 >> sel.p2 >> sel.p3;
surfelements.Append (sel);
}
infile >> n; // number of volume elements
cout << n << " Volume elements" << endl;
for (i = 1; i <= n; i++)
{
VOLELEMENT el;
infile >> el.p1 >> el.p2 >> el.p3 >> el.p4;
volelements.Append (el);
}
infile >> n; // number of points
cout << n << " Points" << endl;
for (i = 1; i <= n; i++)
{
POINT3D p;
infile >> p.x >> p.y >> p.z;
points.Append (p);
}
}
void ReadFileMesh (const Mesh & mesh)
{
int i, n;
n = mesh.GetNSE(); // number of surface elements
cout << n << " Surface elements" << endl;
for (i = 1; i <= n; i++)
{
SURFELEMENT sel;
const Element2d & el = mesh.SurfaceElement(i);
sel.snr = el.GetIndex();
sel.p1 = el.PNum(1);
sel.p2 = el.PNum(2);
sel.p3 = el.PNum(3);
surfelements.Append (sel);
}
n = mesh.GetNE(); // number of volume elements
cout << n << " Volume elements" << endl;
for (i = 1; i <= n; i++)
{
VOLELEMENT el;
const Element & nel = mesh.VolumeElement(i);
el.p1 = nel.PNum(1);
el.p2 = nel.PNum(2);
el.p3 = nel.PNum(3);
el.p4 = nel.PNum(4);
// infile >> el.p1 >> el.p2 >> el.p3 >> el.p4;
volelements.Append (el);
}
n = mesh.GetNP(); // number of points
cout << n << " Points" << endl;
for (i = 1; i <= n; i++)
{
POINT3D p;
Point3d mp = mesh.Point(i);
p.x = mp.X();
p.y = mp.Y();
p.z = mp.Z();
// infile >> p.x >> p.y >> p.z;
points.Append (p);
}
}
void Convert ()
{
int i, j, facei, edgei;
INDEX_3 i3;
INDEX_2 i2;
INDEX_3_HASHTABLE<int> faceindex(volelements.Size()/5 + 1);
INDEX_2_HASHTABLE<int> edgeindex(volelements.Size()/5 + 1);
for (i = 1; i <= volelements.Size(); i++)
{
for (j = 1; j <= 4; j++)
{
switch (j)
{
case 1:
i3.I1() = volelements.Get(i).p2;
i3.I2() = volelements.Get(i).p3;
i3.I3() = volelements.Get(i).p4;
break;
case 2:
i3.I1() = volelements.Get(i).p1;
i3.I2() = volelements.Get(i).p3;
i3.I3() = volelements.Get(i).p4;
break;
case 3:
i3.I1() = volelements.Get(i).p1;
i3.I2() = volelements.Get(i).p2;
i3.I3() = volelements.Get(i).p4;
break;
case 4:
i3.I1() = volelements.Get(i).p1;
i3.I2() = volelements.Get(i).p2;
i3.I3() = volelements.Get(i).p3;
break;
default:
i3.I1()=i3.I2()=i3.I3()=0;
}
i3.Sort();
if (faceindex.Used (i3))
facei = faceindex.Get(i3);
else
{
FACE fa;
fa.p1 = i3.I1();
fa.p2 = i3.I2();
fa.p3 = i3.I3();
faces.Append (fa);
facei = faces.Size();
faceindex.Set (i3, facei);
}
volelements.Elem(i).faces[j-1] = facei;
}
}
for (i = 1; i <= faces.Size(); i++)
{
for (j = 1; j <= 3; j++)
{
switch (j)
{
case 1:
i2.I1() = faces.Get(i).p2;
i2.I2() = faces.Get(i).p3;
break;
case 2:
i2.I1() = faces.Get(i).p1;
i2.I2() = faces.Get(i).p3;
break;
case 3:
i2.I1() = faces.Get(i).p1;
i2.I2() = faces.Get(i).p2;
break;
default:
i2.I1()=i2.I2()=0;
}
if (i2.I1() > i2.I2()) swap (i2.I1(), i2.I2());
if (edgeindex.Used (i2))
edgei = edgeindex.Get(i2);
else
{
EDGE ed;
ed.p1 = i2.I1();
ed.p2 = i2.I2();
edges.Append (ed);
edgei = edges.Size();
edgeindex.Set (i2, edgei);
}
faces.Elem(i).edges[j-1] = edgei;
}
}
}
void WriteFile (ostream & outfile)
{
int i;
outfile
<< "#VERSION: 1.0" << endl
<< "#PROGRAM: NETGEN" << endl
<< "#EQN_TYPE: POISSON" << endl
<< "#DIMENSION: 3D" << endl
<< "#DEG_OF_FREE: 1" << endl
<< "#DESCRIPTION: I don't know" << endl
<< "##RENUM: not done" << endl
<< "#USER: Kleinzen" << endl
<< "DATE: 10.06.1996" << endl;
outfile << "#HEADER: 8" << endl
<< points.Size() << " " << edges.Size() << " "
<< faces.Size() << " " << volelements.Size() << " 0 0 0 0" << endl;
outfile << "#VERTEX: " << points.Size() << endl;
for (i = 1; i <= points.Size(); i++)
outfile << " " << i << " " << points.Get(i).x << " " << points.Get(i).y
<< " " << points.Get(i).z << endl;
outfile << "#EDGE: " << edges.Size() << endl;
for (i = 1; i <= edges.Size(); i++)
outfile << " " << i << " 1 "
<< edges.Get(i).p1 << " "
<< edges.Get(i).p2
<< " 0" << endl;
outfile << "#FACE: " << faces.Size() << endl;
for (i = 1; i <= faces.Size(); i++)
outfile << " " << i << " 1 3 "
<< faces.Get(i).edges[0] << " "
<< faces.Get(i).edges[1] << " "
<< faces.Get(i).edges[2] << endl;
outfile << "#SOLID: " << volelements.Size() << endl;
for (i = 1; i <= volelements.Size(); i++)
outfile << " " << i << " 1 4 "
<< volelements.Get(i).faces[0] << " "
<< volelements.Get(i).faces[1] << " "
<< volelements.Get(i).faces[2] << " "
<< volelements.Get(i).faces[3] << endl;
outfile << "#END_OF_DATA" << endl;
}
void WriteUserChemnitz (const Mesh & mesh,
const filesystem::path & filename)
{
ofstream outfile (filename);
ReadFileMesh (mesh);
Convert ();
WriteFile (outfile);
cout << "Wrote Chemnitz standard file" << endl;
}
static RegisterUserFormat reg_chemnitz ("Chemnitz Format", {"*"}, nullopt, WriteUserChemnitz );
}
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