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periodic edges

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This commit is contained in:
Joachim Schoeberl 2021-08-15 13:29:28 +02:00
parent eba02368a6
commit b041a5fb38
1 changed files with 121 additions and 47 deletions
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158
libsrc/occ/occgenmesh.cpp
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@ -13,7 +13,7 @@ namespace netgen
#define TCL_OK 0
#define TCL_ERROR 1
#define DIVIDEEDGESECTIONS 1000
#define DIVIDEEDGESECTIONS 10000 // better solution to come soon
#define IGNORECURVELENGTH 1e-4
#define VSMALL 1e-10
@ -468,58 +468,127 @@ namespace netgen
cof = BRep_Tool::CurveOnSurface (edge, face, s0, s1);
int geomedgenr = geom.emap.FindIndex(edge);
NgArray <MeshPoint> mp;
NgArray<PointIndex> pnums;
NgArray <double> params;
DivideEdge (edge, mp, params, mesh, mparam);
NgArray<PointIndex> pnums(mp.Size()+2);
// check for identifications
bool copy_identified = false;
if (auto it = geom.identifications.find(edge.TShape()); it != geom.identifications.end())
for (auto & ids : it->second)
{
cout << "edge has identification with trafo " << ids.name << ", inv = " << ids.inverse << endl;
int otherind = geom.emap.FindIndex(ids.other);
Array<Segment> othersegs;
for (auto & seg : mesh.LineSegments())
if (seg.edgenr == otherind)
othersegs.Append (seg);
if (!merge_solids)
if (othersegs.Size())
{
cout << "other has already segs" << endl;
copy_identified = true;
Array<PointIndex> pnums_other;
pnums_other.Append (othersegs[0][0]);
for (auto & seg : othersegs)
pnums_other.Append (seg[1]);
auto inv = ids.trafo.CalcInverse();
// for (auto & pi : pnums)
for (auto oi : Range(pnums_other))
{
PointIndex piother = pnums_other[pnums_other.Size()-oi-1];
Point<3> pother = mesh[piother];
Point<3> p = inv(pother);
bool found = false;
PointIndex pi;
for (PointIndex piv : vertexrange)
if (Dist2 (mesh[piv], p) < eps*eps)
{
pi = piv;
found = true;
}
if (!found)
pi = mesh.AddPoint (p);
// params.Add ( find parameter p );
double s0, s1;
Handle(Geom_Curve) curve = BRep_Tool::Curve(edge, s0, s1);
GeomAPI_ProjectPointOnCurve proj(ng2occ(p), curve);
params.Append (proj.LowerDistanceParameter());
pnums.Append (pi);
mesh.GetIdentifications().Add (pi, piother, geomedgenr);
}
mesh.GetIdentifications().SetType(geomedgenr,Identifications::PERIODIC);
copy_identified = true;
break;
}
}
if (!copy_identified)
{
pnums[0] = geom.vmap.FindIndex (TopExp::FirstVertex (edge)) + PointIndex::BASE-1;
pnums.Last() = geom.vmap.FindIndex (TopExp::LastVertex (edge)) + PointIndex::BASE-1;
}
else
{
Point<3> fp = occ2ng (BRep_Tool::Pnt (TopExp::FirstVertex (edge)));
Point<3> lp = occ2ng (BRep_Tool::Pnt (TopExp::LastVertex (edge)));
NgArray <MeshPoint> mp;
pnums[0] = PointIndex::INVALID;
pnums.Last() = PointIndex::INVALID;
for (PointIndex pi : vertexrange)
DivideEdge (edge, mp, params, mesh, mparam);
pnums.SetSize(mp.Size()+2);
if (!merge_solids)
{
if (Dist2 (mesh[pi], fp) < eps*eps) pnums[0] = pi;
if (Dist2 (mesh[pi], lp) < eps*eps) pnums.Last() = pi;
pnums[0] = geom.vmap.FindIndex (TopExp::FirstVertex (edge)) + PointIndex::BASE-1;
pnums.Last() = geom.vmap.FindIndex (TopExp::LastVertex (edge)) + PointIndex::BASE-1;
}
else
{
Point<3> fp = occ2ng (BRep_Tool::Pnt (TopExp::FirstVertex (edge)));
Point<3> lp = occ2ng (BRep_Tool::Pnt (TopExp::LastVertex (edge)));
pnums[0] = PointIndex::INVALID;
pnums.Last() = PointIndex::INVALID;
for (PointIndex pi : vertexrange)
{
if (Dist2 (mesh[pi], fp) < eps*eps) pnums[0] = pi;
if (Dist2 (mesh[pi], lp) < eps*eps) pnums.Last() = pi;
}
}
for (size_t i = 1; i <= mp.Size(); i++)
{
bool exists = false;
tsearch.Start();
// for (PointIndex j = first_ep; j < mesh.Points().End(); j++)
for (PointIndex j = first_ep; j < *mesh.Points().Range().end(); j++)
if ((mesh.Point(j)-Point<3>(mp[i-1])).Length() < eps)
{
exists = true;
pnums[i] = j;
break;
}
tsearch.Stop();
if (!exists)
pnums[i] = mesh.AddPoint (mp[i-1]);
}
}
for (size_t i = 1; i <= mp.Size(); i++)
{
bool exists = false;
tsearch.Start();
// for (PointIndex j = first_ep; j < mesh.Points().End(); j++)
for (PointIndex j = first_ep; j < *mesh.Points().Range().end(); j++)
if ((mesh.Point(j)-Point<3>(mp[i-1])).Length() < eps)
{
exists = true;
pnums[i] = j;
break;
}
tsearch.Stop();
if (!exists)
pnums[i] = mesh.AddPoint (mp[i-1]);
}
if(geom.enames.Size() && geom.enames[curr-1] != "")
mesh.SetCD2Name(geomedgenr, geom.enames[curr-1]);
(*testout) << "NP = " << mesh.GetNP() << endl;
//(*testout) << pnums[pnums.Size()-1] << endl;
for (size_t i = 1; i <= mp.Size()+1; i++)
// for (size_t i = 1; i <= mp.Size()+1; i++)
for (size_t i = 1; i < pnums.Size(); i++)
{
// edgenr++;
Segment seg;
@ -534,15 +603,20 @@ namespace netgen
seg.epgeominfo[0].edgenr = geomedgenr;
seg.epgeominfo[1].edgenr = geomedgenr;
gp_Pnt2d p2d;
p2d = cof->Value(params[i-1]);
gp_Pnt2d p2d1, p2d2;
double s0 = params[i-1];
double s1 = params[i];
double delta = s1-s0;
s0 += 1e-10*delta; // fixes normal-vector roundoff problem when endpoint is cone-tip
s1 -= 1e-10*delta;
p2d1 = cof->Value(s0);
p2d2 = cof->Value(s1);
// if (i == 1) p2d = cof->Value(s0);
seg.epgeominfo[0].u = p2d.X();
seg.epgeominfo[0].v = p2d.Y();
p2d = cof->Value(params[i]);
seg.epgeominfo[0].u = p2d1.X(); // + 1e-10 * vec.X();
seg.epgeominfo[0].v = p2d1.Y(); // + 1e-10 * vec.Y();
// if (i == mp.Size()+1) p2d = cof -> Value(s1);
seg.epgeominfo[1].u = p2d.X();
seg.epgeominfo[1].v = p2d.Y();
seg.epgeominfo[1].u = p2d2.X(); // - 1e-10 * vec.X();
seg.epgeominfo[1].v = p2d2.Y(); // - 1e-10 * vec.Y();
/*
if (occface->IsUPeriodic())