mirror of
https://github.com/NGSolve/netgen.git
synced 2024-11-14 18:08:33 +05:00
573 lines
13 KiB
C++
573 lines
13 KiB
C++
/*
|
|
Advancing front class for surfaces
|
|
*/
|
|
|
|
#include <mystdlib.h>
|
|
#include "meshing.hpp"
|
|
|
|
|
|
namespace netgen
|
|
{
|
|
FrontPoint2 :: FrontPoint2 (const Point<3> & ap, PointIndex agi,
|
|
MultiPointGeomInfo * amgi, bool aonsurface)
|
|
{
|
|
p = ap;
|
|
globalindex = agi;
|
|
nlinetopoint = 0;
|
|
frontnr = INT_MAX-10;
|
|
onsurface = aonsurface;
|
|
|
|
if (amgi)
|
|
{
|
|
mgi = new MultiPointGeomInfo (*amgi);
|
|
for (int i = 1; i <= mgi->GetNPGI(); i++)
|
|
if (mgi->GetPGI(i).trignum <= 0)
|
|
cout << "WARNING: Add FrontPoint2, illegal geominfo = " << mgi->GetPGI(i).trignum << endl;
|
|
}
|
|
else
|
|
mgi = NULL;
|
|
}
|
|
|
|
|
|
AdFront2 :: AdFront2 (const Box3d & aboundingbox)
|
|
: boundingbox(aboundingbox),
|
|
linesearchtree(boundingbox.PMin(), boundingbox.PMax()),
|
|
pointsearchtree(boundingbox.PMin(), boundingbox.PMax()),
|
|
cpointsearchtree(boundingbox.PMin(), boundingbox.PMax())
|
|
{
|
|
nfl = 0;
|
|
allflines = 0;
|
|
|
|
minval = 0;
|
|
// starti = lines.Begin();
|
|
starti = *lines.Range().begin();
|
|
}
|
|
|
|
AdFront2 :: ~AdFront2 ()
|
|
{
|
|
delete allflines;
|
|
}
|
|
|
|
|
|
void AdFront2 :: PrintOpenSegments (ostream & ost) const
|
|
{
|
|
if (nfl > 0)
|
|
{
|
|
ost << nfl << " open front segments left:" << endl;
|
|
// for (int i = lines.Begin(); i < lines.End(); i++)
|
|
for (int i : lines.Range())
|
|
if (lines[i].Valid())
|
|
ost << i << ": "
|
|
<< GetGlobalIndex (lines[i].L().I1()) << "-"
|
|
<< GetGlobalIndex (lines[i].L().I2()) << endl;
|
|
}
|
|
}
|
|
|
|
/*
|
|
void AdFront2 :: GetPoints (NgArray<Point<3> > & apoints) const
|
|
{
|
|
apoints.Append (points);
|
|
// for (int i = 0; i < points.Size(); i++)
|
|
// apoints.Append (points[i].P());
|
|
}
|
|
*/
|
|
|
|
|
|
|
|
int AdFront2 :: AddPoint (const Point<3> & p, PointIndex globind,
|
|
MultiPointGeomInfo * mgi,
|
|
bool pointonsurface)
|
|
{
|
|
// inserts at empty position or resizes array
|
|
int pi;
|
|
|
|
if (delpointl.Size() != 0)
|
|
{
|
|
pi = delpointl.Last();
|
|
delpointl.DeleteLast ();
|
|
|
|
points[pi] = FrontPoint2 (p, globind, mgi, pointonsurface);
|
|
}
|
|
else
|
|
{
|
|
points.Append (FrontPoint2 (p, globind, mgi, pointonsurface));
|
|
pi = points.Size()-1;
|
|
}
|
|
|
|
if (mgi)
|
|
cpointsearchtree.Insert (p, pi);
|
|
|
|
if (pointonsurface)
|
|
pointsearchtree.Insert (p, pi);
|
|
|
|
return pi;
|
|
}
|
|
|
|
|
|
int AdFront2 :: AddLine (int pi1, int pi2,
|
|
const PointGeomInfo & gi1, const PointGeomInfo & gi2)
|
|
{
|
|
int minfn;
|
|
int li;
|
|
|
|
FrontPoint2 & p1 = points[pi1];
|
|
FrontPoint2 & p2 = points[pi2];
|
|
|
|
|
|
nfl++;
|
|
|
|
p1.AddLine();
|
|
p2.AddLine();
|
|
|
|
minfn = min2 (p1.FrontNr(), p2.FrontNr());
|
|
p1.DecFrontNr (minfn+1);
|
|
p2.DecFrontNr (minfn+1);
|
|
|
|
if (dellinel.Size() != 0)
|
|
{
|
|
li = dellinel.Last();
|
|
dellinel.DeleteLast ();
|
|
lines[li] = FrontLine (INDEX_2(pi1, pi2));
|
|
}
|
|
else
|
|
{
|
|
lines.Append(FrontLine (INDEX_2(pi1, pi2)));
|
|
li = lines.Size()-1;
|
|
}
|
|
|
|
|
|
if (!gi1.trignum || !gi2.trignum)
|
|
{
|
|
cout << "WARNING: in AdFront::AddLine, illegal geominfo" << endl;
|
|
}
|
|
|
|
lines[li].SetGeomInfo (gi1, gi2);
|
|
|
|
Box3d lbox;
|
|
lbox.SetPoint(p1.P());
|
|
lbox.AddPoint(p2.P());
|
|
|
|
linesearchtree.Insert (lbox.PMin(), lbox.PMax(), li);
|
|
|
|
if (allflines)
|
|
{
|
|
if (allflines->Used (INDEX_2 (GetGlobalIndex (pi1),
|
|
GetGlobalIndex (pi2))))
|
|
{
|
|
cerr << "ERROR Adfront2::AddLine: line exists" << endl;
|
|
(*testout) << "ERROR Adfront2::AddLine: line exists" << endl;
|
|
}
|
|
|
|
allflines->Set (INDEX_2 (GetGlobalIndex (pi1),
|
|
GetGlobalIndex (pi2)), 1);
|
|
}
|
|
|
|
return li;
|
|
}
|
|
|
|
|
|
void AdFront2 :: DeleteLine (int li)
|
|
{
|
|
int pi;
|
|
|
|
nfl--;
|
|
|
|
for (int i = 1; i <= 2; i++)
|
|
{
|
|
pi = lines[li].L().I(i);
|
|
points[pi].RemoveLine();
|
|
|
|
if (!points[pi].Valid())
|
|
{
|
|
delpointl.Append (pi);
|
|
if (points[pi].mgi)
|
|
{
|
|
cpointsearchtree.DeleteElement (pi);
|
|
delete points[pi].mgi;
|
|
points[pi].mgi = NULL;
|
|
}
|
|
|
|
pointsearchtree.DeleteElement (pi);
|
|
}
|
|
}
|
|
|
|
if (allflines)
|
|
{
|
|
allflines->Set (INDEX_2 (GetGlobalIndex (lines[li].L().I1()),
|
|
GetGlobalIndex (lines[li].L().I2())), 2);
|
|
}
|
|
|
|
lines[li].Invalidate();
|
|
linesearchtree.DeleteElement (li);
|
|
|
|
dellinel.Append (li);
|
|
}
|
|
|
|
|
|
int AdFront2 :: ExistsLine (int pi1, int pi2)
|
|
{
|
|
if (!allflines)
|
|
return 0;
|
|
if (allflines->Used (INDEX_2(pi1, pi2)))
|
|
return allflines->Get (INDEX_2 (pi1, pi2));
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
|
|
int AdFront2 :: SelectBaseLine (Point<3> & p1, Point<3> & p2,
|
|
const PointGeomInfo *& geominfo1,
|
|
const PointGeomInfo *& geominfo2,
|
|
int & qualclass)
|
|
{
|
|
int baselineindex = -1;
|
|
|
|
// for (int i = starti; i < lines.End(); i++)
|
|
for (int i = starti; i < *lines.Range().end(); i++)
|
|
{
|
|
if (lines[i].Valid())
|
|
{
|
|
int hi = lines[i].LineClass() +
|
|
points[lines[i].L().I1()].FrontNr() +
|
|
points[lines[i].L().I2()].FrontNr();
|
|
|
|
if (hi <= minval)
|
|
{
|
|
minval = hi;
|
|
baselineindex = i;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (baselineindex == -1)
|
|
{
|
|
minval = INT_MAX;
|
|
// for (int i = lines.Begin(); i < lines.End(); i++)
|
|
for (int i : lines.Range())
|
|
if (lines[i].Valid())
|
|
{
|
|
int hi = lines[i].LineClass() +
|
|
points[lines[i].L().I1()].FrontNr() +
|
|
points[lines[i].L().I2()].FrontNr();
|
|
|
|
if (hi < minval)
|
|
{
|
|
minval = hi;
|
|
baselineindex = i;
|
|
}
|
|
}
|
|
}
|
|
starti = baselineindex+1;
|
|
|
|
p1 = points[lines[baselineindex].L().I1()].P();
|
|
p2 = points[lines[baselineindex].L().I2()].P();
|
|
geominfo1 = &lines[baselineindex].GetGeomInfo(1);
|
|
geominfo2 = &lines[baselineindex].GetGeomInfo(2);
|
|
|
|
qualclass = lines[baselineindex].LineClass();
|
|
|
|
return baselineindex;
|
|
}
|
|
|
|
|
|
|
|
|
|
int AdFront2 :: GetLocals (int baselineindex,
|
|
NgArray<Point<3>> & locpoints,
|
|
NgArray<MultiPointGeomInfo> & pgeominfo,
|
|
NgArray<INDEX_2> & loclines, // local index
|
|
NgArray<INDEX> & pindex,
|
|
NgArray<INDEX> & lindex,
|
|
double xh)
|
|
{
|
|
static Timer timer("adfront2::GetLocals"); RegionTimer reg (timer);
|
|
|
|
int pstind;
|
|
Point<3> midp, p0;
|
|
|
|
pstind = lines[baselineindex].L().I1();
|
|
p0 = points[pstind].P();
|
|
|
|
loclines.Append(lines[baselineindex].L());
|
|
lindex.Append(baselineindex);
|
|
|
|
ArrayMem<int, 1000> nearlines(0);
|
|
NgArrayMem<int, 1000> nearpoints(0);
|
|
|
|
// dominating costs !!
|
|
linesearchtree.GetIntersecting (p0 - Vec3d(xh, xh, xh),
|
|
p0 + Vec3d(xh, xh, xh),
|
|
nearlines);
|
|
|
|
// only special points that are not in adfront,
|
|
// other points are from linesearchtree
|
|
cpointsearchtree.GetIntersecting(p0 - Vec3d(xh, xh, xh),
|
|
p0 + Vec3d(xh, xh, xh),
|
|
nearpoints);
|
|
|
|
for(auto i : nearlines)
|
|
{
|
|
if (lines[i].Valid() && i != baselineindex)
|
|
{
|
|
loclines.Append(lines[i].L());
|
|
lindex.Append(i);
|
|
}
|
|
}
|
|
|
|
// static NgArray<int> invpindex;
|
|
invpindex.SetSize (points.Size());
|
|
// invpindex = -1;
|
|
for(auto pi : nearpoints)
|
|
invpindex[pi] = -1;
|
|
|
|
for(const auto& li : loclines)
|
|
{
|
|
invpindex[li.I1()] = 0;
|
|
invpindex[li.I2()] = 0;
|
|
}
|
|
|
|
|
|
for(auto& line : loclines)
|
|
{
|
|
for(auto i : Range(2))
|
|
{
|
|
auto& pi = line[i];
|
|
if (invpindex[pi] == 0)
|
|
{
|
|
pindex.Append (pi);
|
|
invpindex[pi] = pindex.Size();
|
|
locpoints.Append (points[pi].P());
|
|
pi = locpoints.Size();
|
|
}
|
|
else
|
|
pi = invpindex[pi];
|
|
}
|
|
}
|
|
|
|
|
|
// double xh2 = xh*xh;
|
|
for(auto i : nearpoints)
|
|
{
|
|
if (points[i].Valid() &&
|
|
points[i].OnSurface() &&
|
|
// Dist2 (points.Get(i).P(), p0) <= xh2 &&
|
|
invpindex[i] <= 0)
|
|
{
|
|
locpoints.Append (points[i].P());
|
|
invpindex[i] = locpoints.Size();
|
|
pindex.Append(i);
|
|
}
|
|
}
|
|
/*
|
|
double xh2 = xh*xh;
|
|
for (i = 1; i <= points.Size(); i++)
|
|
{
|
|
if (points.Get(i).Valid() &&
|
|
points.Get(i).OnSurface() &&
|
|
Dist2 (points.Get(i).P(), p0) <= xh2 &&
|
|
invpindex.Get(i) <= 0)
|
|
{
|
|
invpindex.Elem(i) =
|
|
locpoints.Append (points.Get(i).P());
|
|
pindex.Append(i);
|
|
}
|
|
}
|
|
*/
|
|
|
|
pgeominfo.SetSize (locpoints.Size());
|
|
for (int i = 0; i < pgeominfo.Size(); i++)
|
|
pgeominfo[i].Init();
|
|
|
|
|
|
for (int i = 0; i < loclines.Size(); i++)
|
|
for (int j = 0; j < 2; j++)
|
|
{
|
|
int lpi = loclines[i][j];
|
|
|
|
const PointGeomInfo & gi =
|
|
lines[lindex[i]].GetGeomInfo (j+1);
|
|
pgeominfo.Elem(lpi).AddPointGeomInfo (gi);
|
|
|
|
/*
|
|
if (pgeominfo.Elem(lpi).cnt == MULTIPOINTGEOMINFO_MAX)
|
|
break;
|
|
|
|
const PointGeomInfo & gi =
|
|
lines.Get(lindex.Get(i)).GetGeomInfo (j);
|
|
|
|
PointGeomInfo * pgi = pgeominfo.Elem(lpi).mgi;
|
|
|
|
int found = 0;
|
|
for (k = 0; k < pgeominfo.Elem(lpi).cnt; k++)
|
|
if (pgi[k].trignum == gi.trignum)
|
|
found = 1;
|
|
|
|
if (!found)
|
|
{
|
|
pgi[pgeominfo.Elem(lpi).cnt] = gi;
|
|
pgeominfo.Elem(lpi).cnt++;
|
|
}
|
|
*/
|
|
}
|
|
|
|
for (int i = 0; i < locpoints.Size(); i++)
|
|
{
|
|
int pi = pindex[i];
|
|
|
|
if (points[pi].mgi)
|
|
for (int j = 1; j <= points[pi].mgi->GetNPGI(); j++)
|
|
pgeominfo[i].AddPointGeomInfo (points[pi].mgi->GetPGI(j));
|
|
}
|
|
|
|
if (loclines.Size() == 1)
|
|
{
|
|
cout << "loclines.Size = 1" << endl;
|
|
(*testout) << "loclines.size = 1" << endl
|
|
<< " h = " << xh << endl
|
|
<< " nearline.size = " << nearlines.Size() << endl
|
|
<< " p0 = " << p0 << endl;
|
|
}
|
|
|
|
return lines[baselineindex].LineClass();
|
|
}
|
|
|
|
|
|
|
|
void AdFront2 :: SetStartFront ()
|
|
{
|
|
// for (int i = lines.Begin(); i < lines.End(); i++)
|
|
for (int i : lines.Range())
|
|
if (lines[i].Valid())
|
|
for (int j = 1; j <= 2; j++)
|
|
points[lines[i].L().I(j)].DecFrontNr(0);
|
|
}
|
|
|
|
|
|
void AdFront2 :: Print (ostream & ost) const
|
|
{
|
|
ost << points.Size() << " Points: " << endl;
|
|
// for (int i = points.Begin(); i < points.End(); i++)
|
|
for (int i : points.Range())
|
|
if (points[i].Valid())
|
|
ost << i << " " << points[i].P() << endl;
|
|
|
|
ost << nfl << " Lines: " << endl;
|
|
// for (int i = lines.Begin(); i < lines.End(); i++)
|
|
for (int i : lines.Range())
|
|
if (lines[i].Valid())
|
|
ost << lines[i].L().I1() << " - " << lines[i].L().I2() << endl;
|
|
|
|
ost << flush;
|
|
}
|
|
|
|
|
|
bool AdFront2 :: Inside (const Point<2> & p) const
|
|
{
|
|
int cnt;
|
|
Vec<2> n;
|
|
Vec<3> v1;
|
|
DenseMatrix a(2), ainv(2);
|
|
Vector b(2), u(2);
|
|
|
|
// quasi-random numbers:
|
|
n(0) = 0.123871;
|
|
n(1) = 0.15432;
|
|
|
|
cnt = 0;
|
|
for (int i = 0; i < lines.Size(); i++)
|
|
if (lines[i].Valid())
|
|
{
|
|
const Point<3> & p1 = points[lines[i].L().I1()].P();
|
|
const Point<3> & p2 = points[lines[i].L().I2()].P();
|
|
|
|
v1 = p2 - p1;
|
|
|
|
a(0, 0) = v1(0);
|
|
a(1, 0) = v1(1);
|
|
|
|
a(0, 1) = -n(0);
|
|
a(1, 1) = -n(1);
|
|
|
|
b(0) = p(0) - p1(0);
|
|
b(1) = p(1) - p1(1);
|
|
|
|
CalcInverse (a, ainv);
|
|
ainv.Mult (b, u);
|
|
|
|
if (u(0) >= 0 && u(0) <= 1 && u(1) > 0)
|
|
cnt++;
|
|
}
|
|
|
|
return ((cnt % 2) != 0);
|
|
}
|
|
|
|
bool AdFront2 :: SameSide (const Point<2> & lp1, const Point<2> & lp2,
|
|
const FlatArray<int> * testfaces) const
|
|
{
|
|
int cnt = 0;
|
|
|
|
if (testfaces)
|
|
{
|
|
for (int ii = 0; ii < testfaces->Size(); ii++)
|
|
if (lines[(*testfaces)[ii]].Valid())
|
|
{
|
|
int i = (*testfaces)[ii];
|
|
const Point<3> & p13d = points[lines[i].L().I1()].P();
|
|
const Point<3> & p23d = points[lines[i].L().I2()].P();
|
|
|
|
Point<2> p1(p13d(0), p13d(1));
|
|
Point<2> p2(p23d(0), p23d(1));
|
|
|
|
// p1 + alpha v = lp1 + beta vl
|
|
Vec<2> v = p2-p1;
|
|
Vec<2> vl = lp2 - lp1;
|
|
Mat<2,2> mat, inv;
|
|
Vec<2> rhs, sol;
|
|
mat(0,0) = v(0);
|
|
mat(1,0) = v(1);
|
|
mat(0,1) = -vl(0);
|
|
mat(1,1) = -vl(1);
|
|
rhs = lp1-p1;
|
|
|
|
if (Det(mat) == 0) continue;
|
|
CalcInverse (mat, inv);
|
|
sol = inv * rhs;
|
|
if ( (sol(0) >= 0) && (sol(0) <= 1) && (sol(1) >= 0) && (sol(1) <= 1))
|
|
{ cnt++; }
|
|
}
|
|
|
|
}
|
|
else
|
|
{
|
|
for (int i = 0; i < lines.Size(); i++)
|
|
if (lines[i].Valid())
|
|
{
|
|
const Point<3> & p13d = points[lines[i].L().I1()].P();
|
|
const Point<3> & p23d = points[lines[i].L().I2()].P();
|
|
|
|
Point<2> p1(p13d(0), p13d(1));
|
|
Point<2> p2(p23d(0), p23d(1));
|
|
|
|
// p1 + alpha v = lp1 + beta vl
|
|
Vec<2> v = p2-p1;
|
|
Vec<2> vl = lp2 - lp1;
|
|
Mat<2,2> mat, inv;
|
|
Vec<2> rhs, sol;
|
|
mat(0,0) = v(0);
|
|
mat(1,0) = v(1);
|
|
mat(0,1) = -vl(0);
|
|
mat(1,1) = -vl(1);
|
|
rhs = lp1-p1;
|
|
|
|
if (Det(mat) == 0) continue;
|
|
CalcInverse (mat, inv);
|
|
sol = inv * rhs;
|
|
if ((sol(0) >= 0) && (sol(0) <= 1) && (sol(1) >= 0) && (sol(1) <= 1))
|
|
{ cnt++; }
|
|
}
|
|
}
|
|
return ((cnt % 2) == 0);
|
|
}
|
|
}
|