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lexicographic ordering for uni-form mesh refinement

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This commit is contained in:
Joachim Schöberl 2016-02-26 20:29:14 +01:00
parent 8859b8e28c
commit 1ac9c02f5b
2 changed files with 108 additions and 39 deletions
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8
libsrc/general/template.hpp
View File

@ -195,6 +195,14 @@ inline INDEX_2 Sort (const INDEX_2 & i2)
return tmp;
}
inline bool operator< (const INDEX_2 ia, const INDEX_2 ib)
{
if (ia[0] < ib[0]) return true;
if (ia[0] > ib[0]) return false;
if (ia[1] < ib[1]) return true;
return false;
}
///
class INDEX_3

135
libsrc/meshing/refine.cpp
View File

@ -20,28 +20,82 @@ namespace netgen
INDEX_2_HASHTABLE<PointIndex> between(mesh.GetNP() + 5);
int oldne, oldns, oldnf;
// new version with consistent ordering across sub-domains
Array<INDEX_2> parents;
cout << "find edges" << endl;
for (SegmentIndex si = 0; si < mesh.GetNSeg(); si++)
{
const Segment & el = mesh[si];
INDEX_2 i2 = INDEX_2::Sort(el[0], el[1]);
if (!between.Used(i2))
{
between.Set (i2, 0);
parents.Append(i2);
}
}
for (SurfaceElementIndex sei = 0; sei < mesh.GetNSE(); sei++)
{
const Element2d & el = mesh[sei];
switch (el.GetType())
{
case TRIG:
case TRIG6:
{
static int betw[3][3] =
{ { 2, 3, 4 },
{ 1, 3, 5 },
{ 1, 2, 6 } };
for (int j = 0; j < 3; j++)
{
INDEX_2 i2 = INDEX_2::Sort(el.PNum(betw[j][0]),el.PNum(betw[j][1]));
if (!between.Used(i2))
{
between.Set (i2, 0);
parents.Append(i2);
}
}
break;
}
default:
throw NgException ("currently refinement for quad-elements is not supported");
}
}
Array<int> par_nr(parents.Size());
for (int i = 0; i < par_nr.Size(); i++)
par_nr[i] = i;
QuickSort (parents, par_nr);
for (int i = 0; i < parents.Size(); i++)
between.Set (parents[i], mesh.GetNV()+i+PointIndex::BASE);
mesh.SetNP(mesh.GetNV() + parents.Size());
Array<bool, PointIndex::BASE> pointset(mesh.GetNP());
pointset = false;
// refine edges
Array<EdgePointGeomInfo,PointIndex::BASE> epgi;
oldns = mesh.GetNSeg();
int oldns = mesh.GetNSeg();
for (SegmentIndex si = 0; si < oldns; si++)
{
const Segment & el = mesh.LineSegment(si);
INDEX_2 i2 = INDEX_2::Sort(el[0], el[1]);
PointIndex pinew;
PointIndex pinew = between.Get(i2);
EdgePointGeomInfo ngi;
if (between.Used(i2))
if (pointset[pinew])
{
pinew = between.Get(i2);
// pinew = between.Get(i2);
ngi = epgi[pinew];
}
else
{
pointset[pinew] = true;
Point<3> pnew;
PointBetween (mesh.Point (el[0]),
mesh.Point (el[1]), 0.5,
@ -49,9 +103,9 @@ namespace netgen
el.epgeominfo[0], el.epgeominfo[1],
pnew, ngi);
pinew = mesh.AddPoint (pnew);
between.Set (i2, pinew);
// pinew = mesh.AddPoint (pnew);
mesh.Point(pinew) = pnew;
// between.Set (i2, pinew);
if (pinew >= epgi.Size()+PointIndex::BASE)
epgi.SetSize (pinew+1-PointIndex::BASE);
@ -68,6 +122,8 @@ namespace netgen
mesh.LineSegment(si) = ns1;
mesh.AddSegment (ns2);
}
cout << "have segments" << endl;
// refine surface elements
Array<PointGeomInfo,PointIndex::BASE> surfgi (8*mesh.GetNP());
@ -76,10 +132,9 @@ namespace netgen
surfgi[i].trignum = -1;
oldnf = mesh.GetNSE();
int oldnf = mesh.GetNSE();
for (SurfaceElementIndex sei = 0; sei < oldnf; sei++)
{
int j, k;
const Element2d & el = mesh.SurfaceElement(sei);
switch (el.GetType())
@ -95,13 +150,13 @@ namespace netgen
{ 1, 3, 5 },
{ 1, 2, 6 } };
for (j = 1; j <= 3; j++)
for (int j = 1; j <= 3; j++)
{
pnums.Elem(j) = el.PNum(j);
pgis.Elem(j) = el.GeomInfoPi(j);
}
for (j = 0; j < 3; j++)
for (int j = 0; j < 3; j++)
{
PointIndex pi1 = pnums.Elem(betw[j][0]);
PointIndex pi2 = pnums.Elem(betw[j][1]);
@ -120,6 +175,14 @@ namespace netgen
pgis.Elem(4+j) = pgi;
PointIndex pinew = between.Get(i2);
pnums.Elem(4+j) = pinew;
if (!pointset[pinew])
{
pointset[pinew] = true;
mesh.Point(pinew) = pb;
}
/*
if (between.Used(i2))
pnums.Elem(4+j) = between.Get(i2);
else
@ -127,7 +190,7 @@ namespace netgen
pnums.Elem(4+j) = mesh.AddPoint (pb);
between.Set (i2, pnums.Get(4+j));
}
*/
if (surfgi.Size() < pnums.Elem(4+j))
surfgi.SetSize (pnums.Elem(4+j));
surfgi.Elem(pnums.Elem(4+j)) = pgis.Elem(4+j);
@ -141,10 +204,10 @@ namespace netgen
{ 6, 4, 5 } };
int ind = el.GetIndex();
for (j = 0; j < 4; j++)
for (int j = 0; j < 4; j++)
{
Element2d nel(TRIG);
for (k = 1; k <= 3; k++)
for (int k = 1; k <= 3; k++)
{
nel.PNum(k) = pnums.Get(reftab[j][k-1]);
nel.GeomInfoPi(k) = pgis.Get(reftab[j][k-1]);
@ -172,13 +235,13 @@ namespace netgen
{ 1, 4, 8 },
{ 5, 7, 9 } };
for (j = 1; j <= 4; j++)
for (int j = 1; j <= 4; j++)
{
pnums.Elem(j) = el.PNum(j);
pgis.Elem(j) = el.GeomInfoPi(j);
}
for (j = 0; j < 5; j++)
for (int j = 0; j < 5; j++)
{
int pi1 = pnums.Elem(betw[j][0]);
int pi2 = pnums.Elem(betw[j][1]);
@ -219,10 +282,10 @@ namespace netgen
{ 9, 6, 3, 7 } };
int ind = el.GetIndex();
for (j = 0; j < 4; j++)
for (int j = 0; j < 4; j++)
{
Element2d nel(QUAD);
for (k = 1; k <= 4; k++)
for (int k = 1; k <= 4; k++)
{
nel.PNum(k) = pnums.Get(reftab[j][k-1]);
nel.GeomInfoPi(k) = pgis.Get(reftab[j][k-1]);
@ -242,11 +305,9 @@ namespace netgen
}
// refine volume elements
oldne = mesh.GetNE();
int oldne = mesh.GetNE();
for (ElementIndex ei = 0; ei < oldne; ei++)
{
int j, k;
const Element & el = mesh.VolumeElement(ei);
switch (el.GetType())
{
@ -264,12 +325,12 @@ namespace netgen
int elrev = el.flags.reverse;
for (j = 1; j <= 4; j++)
for (int j = 1; j <= 4; j++)
pnums.Elem(j) = el.PNum(j);
if (elrev)
swap (pnums.Elem(3), pnums.Elem(4));
for (j = 0; j < 6; j++)
for (int j = 0; j < 6; j++)
{
INDEX_2 i2;
i2.I1() = pnums.Get(betw[j][0]);
@ -312,10 +373,10 @@ namespace netgen
};
int ind = el.GetIndex();
for (j = 0; j < 8; j++)
for (int j = 0; j < 8; j++)
{
Element nel;
for (k = 1; k <= 4; k++)
for (int k = 1; k <= 4; k++)
nel.PNum(k) = pnums.Get(reftab[j][k-1]);
nel.SetIndex(ind);
nel.flags.reverse = reverse[j];
@ -386,11 +447,11 @@ namespace netgen
pnums = PointIndex(-1);
for (j = 1; j <= 8; j++)
for (int j = 1; j <= 8; j++)
pnums.Elem(j) = el.PNum(j);
for (j = 0; j < 13; j++)
for (int j = 0; j < 13; j++)
{
INDEX_2 i2;
i2.I1() = pnums.Get(betw[j][0]);
@ -408,7 +469,7 @@ namespace netgen
}
}
for (j = 0; j < 6; j++)
for (int j = 0; j < 6; j++)
{
INDEX_2 i2a, i2b;
i2a.I1() = pnums.Get(fbetw[2*j][0]);
@ -444,10 +505,10 @@ namespace netgen
int ind = el.GetIndex();
for (j = 0; j < 8; j++)
for (int j = 0; j < 8; j++)
{
Element nel(HEX);
for (k = 1; k <= 8; k++)
for (int k = 1; k <= 8; k++)
nel.PNum(k) = pnums.Get(reftab[j][k-1]);
nel.SetIndex(ind);
@ -496,12 +557,12 @@ namespace netgen
//int elrev = el.flags.reverse;
pnums = PointIndex(-1);
for (j = 1; j <= 6; j++)
for (int j = 1; j <= 6; j++)
pnums.Elem(j) = el.PNum(j);
// if (elrev)
// swap (pnums.Elem(3), pnums.Elem(4));
for (j = 0; j < 9; j++)
for (int j = 0; j < 9; j++)
{
INDEX_2 i2;
i2.I1() = pnums.Get(betw[j][0]);
@ -519,7 +580,7 @@ namespace netgen
}
}
for (j = 0; j < 3; j++)
for (int j = 0; j < 3; j++)
{
INDEX_2 i2a, i2b;
i2a.I1() = pnums.Get(fbetw[2*j][0]);
@ -556,10 +617,10 @@ namespace netgen
int ind = el.GetIndex();
for (j = 0; j < 8; j++)
for (int j = 0; j < 8; j++)
{
Element nel(PRISM);
for (k = 1; k <= 6; k++)
for (int k = 1; k <= 6; k++)
nel.PNum(k) = pnums.Get(reftab[j][k-1]);
nel.SetIndex(ind);