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#include <mystdlib.h>
#include "meshing.hpp"
namespace netgen
{
// A special function for Hermann Landes, Erlangen
void CutOffAndCombine (Mesh & mesh, const Mesh & othermesh)
{
int i, j;
int nse = othermesh.GetNSE();
int onp = othermesh.GetNP();
int ne = mesh.GetNE();
PrintMessage (1, "other mesh has ",
othermesh.GetNP(), " points, ",
othermesh.GetNSE(), " surface elements.");
NgArray<Box3d> otherbounds(nse);
Box3d otherbox;
double maxh = 0;
for (i = 1; i <= nse; i++)
{
const Element2d & sel = othermesh.SurfaceElement(i);
sel.GetBox(othermesh.Points(), otherbounds.Elem(i));
double loch = othermesh.GetH (othermesh.Point (sel.PNum(1)));
otherbounds.Elem(i).Increase(loch);
if (loch > maxh) maxh = loch;
}
otherbox.SetPoint (othermesh.Point(1));
for (i = 1; i <= othermesh.GetNP(); i++)
otherbox.AddPoint (othermesh.Point(i));
otherbox.Increase (maxh);
for (i = 1; i <= ne; i++)
{
Box3d box;
int remove = 0;
const Element & el = mesh.VolumeElement(i);
el.GetBox(mesh.Points(), box);
if (i % 10000 == 0)
cout << "+" << flush;
if (box.Intersect(otherbox))
{
for (j = 1; j <= nse && !remove; j++)
if (box.Intersect(otherbounds.Get(j)))
remove = 1;
}
if (remove)
mesh.VolumeElement(i).Delete();
}
cout << endl;
TBitArray<PointIndex> connected(mesh.GetNP());
connected.Clear();
for (i = 1; i <= mesh.GetNSE(); i++)
{
const Element2d & el = mesh.SurfaceElement(i);
for (j = 1; j <= 3; j++)
connected.SetBit(el.PNum(j));
}
bool changed;
do
{
changed = 0;
for (i = 1; i <= mesh.GetNE(); i++)
{
const Element & el = mesh.VolumeElement(i);
int has = 0, hasnot = 0;
if (el[0])
{
for (j = 0; j < 4; j++)
{
if (connected.Test(el[j]))
has = 1;
else
hasnot = 1;
}
if (has && hasnot)
{
changed = 1;
for (j = 0; j < 4; j++)
connected.SetBit (el[j]);
}
}
}
cout << "." << flush;
}
while (changed);
cout << endl;
for (i = 1; i <= mesh.GetNE(); i++)
{
const Element & el = mesh.VolumeElement(i);
int hasnot = 0;
if (el[0])
{
for (j = 0; j < 4; j++)
{
if (!connected.Test(el[j]))
hasnot = 1;
}
if (hasnot)
mesh.VolumeElement(i).Delete();
}
}
mesh.Compress();
mesh.FindOpenElements();
TBitArray<PointIndex> locked(mesh.GetNP());
locked.Set();
for (i = 1; i <= mesh.GetNOpenElements(); i++)
for (j = 1; j <= 3; j++)
locked.Clear (mesh.OpenElement(i).PNum(j));
// for (PointIndex i (1); i <= locked.Size(); i++)
for (PointIndex i : locked.Range())
if (locked.Test(i))
{
mesh.AddLockedPoint (i);
}
NgArray<PointIndex> pmat(onp);
for (i = 1; i <= onp; i++)
pmat.Elem(i) = mesh.AddPoint (othermesh.Point(i));
int fnum =
mesh.AddFaceDescriptor (FaceDescriptor(0,0,1,0));
for (i = 1; i <= othermesh.GetNSE(); i++)
{
Element2d tri = othermesh.SurfaceElement(i);
for (j = 1; j <= 3; j++)
tri.PNum(j) = pmat.Get(tri.PNum(j));
tri.SetIndex(fnum);
mesh.AddSurfaceElement (tri);
}
for (i = 1; i <= onp; i++)
mesh.AddLockedPoint (pmat.Elem(i));
mesh.CalcSurfacesOfNode();
mesh.CalcLocalH(0.3);
}
void HelmholtzMesh (Mesh & mesh)
{
int i;
double ri, ra, rinf;
cout << "ri = ";
cin >> ri;
cout << "ra = ";
cin >> ra;
cout << "rinf = ";
cin >> rinf;
double det = ri * ra * rinf - ri * ri * rinf;
double a = (ri - rinf) / det;
double b = (ri*ri - ra * rinf) / det;
for (i = 1; i <= mesh.GetNP(); i++)
{
Point<3> & p = mesh.Point(i);
double rold = sqrt (sqr(p(0)) + sqr(p(1)) + sqr(p(2)));
if (rold < ri) continue;
double rnew = 1 / (a * rold - b);
double fac = rnew / rold;
p(0) *= fac;
p(1) *= fac;
p(2) *= fac;
}
}
}
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