mirror of
https://github.com/NGSolve/netgen.git
synced 2025-02-05 09:14:17 +05:00
Merge branch 'parallel_edgeswapping' into 'master'
Parallel edgeswapping See merge request jschoeberl/netgen!274
This commit is contained in:
Joachim Schöberl
commit
e9d545bcdc
@ -96,12 +96,6 @@ void ParallelFor( int first, int next, const TFunc & f )
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template<typename T>
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inline atomic<T> & AsAtomic (T & d)
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{
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return reinterpret_cast<atomic<T>&> (d);
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}
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typedef void (*TaskManager)(std::function<void(int,int)>);
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typedef void (*Tracer)(string, bool); // false .. start, true .. stop
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@ -7,24 +7,6 @@
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namespace netgen
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{
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class Neighbour
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{
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int nr[3];
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int orient[3];
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public:
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Neighbour () { ; }
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void SetNr (int side, int anr) { nr[side] = anr; }
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int GetNr (int side) { return nr[side]; }
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void SetOrientation (int side, int aorient) { orient[side] = aorient; }
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int GetOrientation (int side) { return orient[side]; }
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};
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class trionedge
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{
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public:
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@ -37,239 +19,25 @@ namespace netgen
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};
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void MeshOptimize2d :: EdgeSwapping (Mesh & mesh, int usemetric)
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{
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static Timer timer("EdgeSwapping (2D)"); RegionTimer reg(timer);
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if (!faceindex)
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{
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if (usemetric)
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PrintMessage (3, "Edgeswapping, metric");
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else
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PrintMessage (3, "Edgeswapping, topological");
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for (faceindex = 1; faceindex <= mesh.GetNFD(); faceindex++)
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{
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EdgeSwapping (mesh, usemetric);
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if (multithread.terminate)
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throw NgException ("Meshing stopped");
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}
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faceindex = 0;
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mesh.CalcSurfacesOfNode();
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return;
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}
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static int timerstart = NgProfiler::CreateTimer ("EdgeSwapping 2D start");
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NgProfiler::StartTimer (timerstart);
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Array<SurfaceElementIndex> seia;
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mesh.GetSurfaceElementsOfFace (faceindex, seia);
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/*
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for (int i = 0; i < seia.Size(); i++)
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if (mesh[seia[i]].GetNP() != 3)
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{
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GenericImprove (mesh);
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return;
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}
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*/
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for (SurfaceElementIndex sei : seia)
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if (mesh[sei].GetNP() != 3)
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{
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GenericImprove (mesh);
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return;
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}
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int surfnr = mesh.GetFaceDescriptor (faceindex).SurfNr();
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Array<Neighbour> neighbors(mesh.GetNSE());
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INDEX_2_HASHTABLE<trionedge> other(2*seia.Size() + 2);
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Array<bool> swapped(mesh.GetNSE());
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NgArray<int,PointIndex::BASE> pdef(mesh.GetNP());
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NgArray<double,PointIndex::BASE> pangle(mesh.GetNP());
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// int e;
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// double d;
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// Vec3d nv1, nv2;
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// double loch(-1);
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static const double minangle[] = { 0, 1.481, 2.565, 3.627, 4.683, 5.736, 7, 9 };
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for (int i = 0; i < seia.Size(); i++)
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{
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const Element2d & sel = mesh[seia[i]];
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for (int j = 0; j < 3; j++)
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pangle[sel[j]] = 0.0;
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}
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// pangle = 0;
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for (int i = 0; i < seia.Size(); i++)
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{
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const Element2d & sel = mesh[seia[i]];
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for (int j = 0; j < 3; j++)
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{
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POINTTYPE typ = mesh[sel[j]].Type();
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if (typ == FIXEDPOINT || typ == EDGEPOINT)
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{
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pangle[sel[j]] +=
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Angle (mesh[sel[(j+1)%3]] - mesh[sel[j]],
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mesh[sel[(j+2)%3]] - mesh[sel[j]]);
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}
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}
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}
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// for (PointIndex pi = PointIndex::BASE;
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// pi < mesh.GetNP()+PointIndex::BASE; pi++)
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// pdef = 0;
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for (int i = 0; i < seia.Size(); i++)
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{
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const Element2d & sel = mesh[seia[i]];
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for (int j = 0; j < 3; j++)
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{
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PointIndex pi = sel[j];
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if (mesh[pi].Type() == INNERPOINT || mesh[pi].Type() == SURFACEPOINT)
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pdef[pi] = -6;
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else
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for (int j = 0; j < 8; j++)
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if (pangle[pi] >= minangle[j])
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pdef[pi] = -1-j;
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}
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}
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/*
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for (int i = 0; i < seia.Size(); i++)
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{
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const Element2d & sel = mesh[seia[i]];
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for (int j = 0; j < 3; j++)
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pdef[sel[j]]++;
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}
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*/
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for (SurfaceElementIndex sei : seia)
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for (PointIndex pi : mesh[sei].PNums<3>())
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pdef[pi]++;
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// for (int i = 0; i < seia.Size(); i++)
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for (SurfaceElementIndex sei : seia)
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for (int j = 0; j < 3; j++)
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{
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neighbors[sei].SetNr (j, -1);
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neighbors[sei].SetOrientation (j, 0);
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}
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/*
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NgArray<Vec3d> normals(mesh.GetNP());
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for (i = 1; i <= mesh.GetNSE(); i++)
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{
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Element2d & hel = mesh.SurfaceElement(i);
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if (hel.GetIndex() == faceindex)
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for (k = 1; k <= 3; k++)
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{
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int pi = hel.PNum(k);
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SelectSurfaceOfPoint (mesh.Point(pi), hel.GeomInfoPi(k));
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int surfi = mesh.GetFaceDescriptor(faceindex).SurfNr();
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GetNormalVector (surfi, mesh.Point(pi), normals.Elem(pi));
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normals.Elem(pi) /= normals.Elem(pi).Length();
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}
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}
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*/
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/*
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for (int i = 0; i < seia.Size(); i++)
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{
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const Element2d & sel = mesh[seia[i]];
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*/
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for (SurfaceElementIndex sei : seia)
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{
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const Element2d & sel = mesh[sei];
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for (int j = 0; j < 3; j++)
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{
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PointIndex pi1 = sel.PNumMod(j+2);
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PointIndex pi2 = sel.PNumMod(j+3);
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// double loch = mesh.GetH(mesh[pi1]);
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// INDEX_2 edge(pi1, pi2);
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// edge.Sort();
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if (mesh.IsSegment (pi1, pi2))
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continue;
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/*
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if (segments.Used (edge))
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continue;
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*/
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INDEX_2 ii2 (pi1, pi2);
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if (other.Used (ii2))
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{
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// INDEX_2 i2s(ii2);
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// i2s.Sort();
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/*
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int i2 = other.Get(ii2).tnr;
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int j2 = other.Get(ii2).sidenr;
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*/
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auto othertrig = other.Get(ii2);
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SurfaceElementIndex i2 = othertrig.tnr;
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int j2 = othertrig.sidenr;
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neighbors[sei].SetNr (j, i2);
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neighbors[sei].SetOrientation (j, j2);
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neighbors[i2].SetNr (j2, sei);
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neighbors[i2].SetOrientation (j2, j);
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}
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else
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{
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other.Set (INDEX_2 (pi2, pi1), trionedge (sei, j));
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}
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}
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}
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for (SurfaceElementIndex sei : seia)
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swapped[sei] = false;
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NgProfiler::StopTimer (timerstart);
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int t = 4;
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bool done = false;
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while (!done && t >= 2)
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{
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for (int i = 0; i < seia.Size(); i++)
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{
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SurfaceElementIndex t1 = seia[i];
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if (mesh[t1].IsDeleted())
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continue;
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if (mesh[t1].GetIndex() != faceindex)
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continue;
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if (multithread.terminate)
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throw NgException ("Meshing stopped");
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for (int o1 = 0; o1 < 3; o1++)
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bool MeshOptimize2d :: EdgeSwapping (Mesh & mesh, const int usemetric,
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Array<Neighbour> &neighbors,
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Array<bool> &swapped,
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const SurfaceElementIndex t1, const int o1,
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const int t,
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Array<int,PointIndex> &pdef,
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const bool check_only)
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{
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bool should;
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bool do_swap = false;
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SurfaceElementIndex t2 = neighbors[t1].GetNr (o1);
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int o2 = neighbors[t1].GetOrientation (o1);
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if (t2 == -1) continue;
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if (swapped[t1] || swapped[t2]) continue;
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if (t2 == -1) return false;
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if (swapped[t1] || swapped[t2]) return false;
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const int faceindex = mesh[t1].GetIndex();
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const int surfnr = mesh.GetFaceDescriptor (faceindex).SurfNr();
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PointIndex pi1 = mesh[t1].PNumMod(o1+1+1);
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PointIndex pi2 = mesh[t1].PNumMod(o1+1+2);
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@ -289,7 +57,7 @@ namespace netgen
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allowswap = allowswap && fabs(1.-(auxvec1*auxvec2)/(auxvec1.Length()*auxvec2.Length())) > 1e-4;
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if(!allowswap)
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continue;
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return false;
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// normal of new
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Vec<3> nv1 = Cross (auxvec1, auxvec2);
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@ -300,7 +68,7 @@ namespace netgen
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if(!allowswap)
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continue;
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return false;
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Vec<3> nv2 = Cross (auxvec1, auxvec2);
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@ -379,24 +147,11 @@ namespace netgen
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if (legal2 < legal1) should = false;
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}
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if (should)
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do_swap = should;
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if (should && !check_only)
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{
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// do swapping !
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done = true;
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/*
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mesh[t1] = { pi1, pi4, pi3 };
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mesh[t2] = { pi2, pi3, pi4 };
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mesh[t1].GeomInfoPi(1) = gi1;
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mesh[t1].GeomInfoPi(2) = gi4;
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mesh[t1].GeomInfoPi(3) = gi3;
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mesh[t2].GeomInfoPi(1) = gi2;
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mesh[t2].GeomInfoPi(2) = gi3;
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mesh[t2].GeomInfoPi(3) = gi4;
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*/
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mesh[t1] = { { pi1, gi1 }, { pi4, gi4 }, { pi3, gi3 } };
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mesh[t2] = { { pi2, gi2 }, { pi3, gi3 }, { pi4, gi4 } };
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@ -409,8 +164,187 @@ namespace netgen
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swapped[t2] = true;
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}
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}
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return do_swap;
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}
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void MeshOptimize2d :: EdgeSwapping (Mesh & mesh, int usemetric)
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{
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static Timer timer("EdgeSwapping (2D)"); RegionTimer reg(timer);
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static Timer timer_nb("EdgeSwapping-Find neighbors");
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if (usemetric)
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PrintMessage (3, "Edgeswapping, metric");
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else
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PrintMessage (3, "Edgeswapping, topological");
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static int timerstart = NgProfiler::CreateTimer ("EdgeSwapping 2D start");
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NgProfiler::StartTimer (timerstart);
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Array<SurfaceElementIndex> seia;
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bool mixed = false;
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if(faceindex==0)
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{
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seia.SetSize(mesh.GetNSE());
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ParallelFor( Range(seia), [&] (auto i) NETGEN_LAMBDA_INLINE
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{
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SurfaceElementIndex sei(i);
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seia[i] = sei;
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if (mesh[sei].GetNP() != 3)
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mixed = true;
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});
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}
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else
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{
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mesh.GetSurfaceElementsOfFace (faceindex, seia);
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for (SurfaceElementIndex sei : seia)
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if (mesh[sei].GetNP() != 3)
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mixed = true;
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}
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if(mixed)
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return GenericImprove(mesh);
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Array<Neighbour> neighbors(mesh.GetNSE());
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auto elements_on_node = mesh.CreatePoint2SurfaceElementTable(faceindex);
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Array<bool> swapped(mesh.GetNSE());
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Array<int,PointIndex> pdef(mesh.GetNP());
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Array<double,PointIndex> pangle(mesh.GetNP());
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static const double minangle[] = { 0, 1.481, 2.565, 3.627, 4.683, 5.736, 7, 9 };
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if(faceindex == 0)
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{
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ParallelFor( Range(pangle), [&] (auto i) NETGEN_LAMBDA_INLINE
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{
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pangle[i] = 0.0;
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});
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}
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else
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{
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ParallelFor( Range(seia), [&] (auto i) NETGEN_LAMBDA_INLINE
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{
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const Element2d & sel = mesh[seia[i]];
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for (int j = 0; j < 3; j++)
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pangle[sel[j]] = 0.0;
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});
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}
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ParallelFor( Range(seia), [&] (auto i) NETGEN_LAMBDA_INLINE
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{
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const Element2d & sel = mesh[seia[i]];
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for (int j = 0; j < 3; j++)
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{
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POINTTYPE typ = mesh[sel[j]].Type();
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if (typ == FIXEDPOINT || typ == EDGEPOINT)
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{
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AtomicAdd(pangle[sel[j]],
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Angle (mesh[sel[(j+1)%3]] - mesh[sel[j]],
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mesh[sel[(j+2)%3]] - mesh[sel[j]]));
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}
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}
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});
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ParallelFor( Range(seia), [&] (auto i) NETGEN_LAMBDA_INLINE
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{
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const Element2d & sel = mesh[seia[i]];
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for (int j = 0; j < 3; j++)
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{
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PointIndex pi = sel[j];
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if (mesh[pi].Type() == INNERPOINT || mesh[pi].Type() == SURFACEPOINT)
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pdef[pi] = -6;
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else
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for (int j = 0; j < 8; j++)
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if (pangle[pi] >= minangle[j])
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pdef[pi] = -1-j;
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}
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});
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ParallelFor( Range(seia), [&pdef, &neighbors, &mesh, &seia, &elements_on_node] (auto i) NETGEN_LAMBDA_INLINE
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{
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auto sei = seia[i];
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for (PointIndex pi : mesh[sei].template PNums<3>())
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AsAtomic(pdef[pi])++;
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for (int j = 0; j < 3; j++)
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{
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neighbors[sei].SetNr (j, -1);
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neighbors[sei].SetOrientation (j, 0);
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}
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const auto sel = mesh[sei];
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for (int j = 0; j < 3; j++)
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{
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PointIndex pi1 = sel.PNumMod(j+2);
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PointIndex pi2 = sel.PNumMod(j+3);
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for (auto sei_other : elements_on_node[pi1])
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{
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if(sei_other==sei) continue;
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const auto & other = mesh[sei_other];
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int pi1_other = -1;
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int pi2_other = -1;
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bool common_edge = false;
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for (int k = 0; k < 3; k++)
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{
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if(other[k] == pi1)
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pi1_other = k;
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if(other[k] == pi2)
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{
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pi2_other = k;
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common_edge = true;
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}
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}
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if(common_edge)
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{
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neighbors[sei].SetNr (j, sei_other);
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neighbors[sei].SetOrientation (j, 3-pi1_other-pi2_other);
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}
|
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}
|
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}
|
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});
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for (SurfaceElementIndex sei : seia)
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swapped[sei] = false;
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NgProfiler::StopTimer (timerstart);
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||||
|
||||
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||||
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Array<std::pair<SurfaceElementIndex,int>> improvement_candidates(3*seia.Size());
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atomic<int> cnt(0);
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||||
|
||||
int t = 4;
|
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bool done = false;
|
||||
while (!done && t >= 2)
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||||
{
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cnt = 0;
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ParallelFor( Range(seia), [&] (auto i) NETGEN_LAMBDA_INLINE
|
||||
{
|
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SurfaceElementIndex t1 = seia[i];
|
||||
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if (mesh[t1].IsDeleted())
|
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return;
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|
||||
if (mesh[t1].GetIndex() != faceindex)
|
||||
return;
|
||||
|
||||
if (multithread.terminate)
|
||||
throw NgException ("Meshing stopped");
|
||||
|
||||
for (int o1 = 0; o1 < 3; o1++)
|
||||
if(EdgeSwapping(mesh, usemetric, neighbors, swapped, t1, o1, t, pdef, true))
|
||||
improvement_candidates[cnt++]= std::make_pair(t1,o1);
|
||||
});
|
||||
|
||||
auto elements_with_improvement = improvement_candidates.Range(cnt.load());
|
||||
QuickSort(elements_with_improvement);
|
||||
|
||||
for (auto [t1,o1] : elements_with_improvement)
|
||||
done |= EdgeSwapping(mesh, usemetric, neighbors, swapped, t1, o1, t, pdef, false);
|
||||
t--;
|
||||
}
|
||||
|
||||
|
||||
@ -2,6 +2,20 @@
|
||||
#define FILE_IMPROVE2
|
||||
|
||||
|
||||
class Neighbour
|
||||
{
|
||||
int nr[3];
|
||||
int orient[3];
|
||||
|
||||
public:
|
||||
Neighbour () { ; }
|
||||
|
||||
void SetNr (int side, int anr) { nr[side] = anr; }
|
||||
int GetNr (int side) { return nr[side]; }
|
||||
|
||||
void SetOrientation (int side, int aorient) { orient[side] = aorient; }
|
||||
int GetOrientation (int side) { return orient[side]; }
|
||||
};
|
||||
|
||||
///
|
||||
class MeshOptimize2d
|
||||
@ -22,6 +36,8 @@ public:
|
||||
void ProjectBoundaryPoints(NgArray<int> & surfaceindex,
|
||||
const NgArray<Point<3>* > & from, NgArray<Point<3>* > & dest);
|
||||
|
||||
bool EdgeSwapping (Mesh & mesh, const int usemetric, Array<Neighbour> &neighbors, Array<bool> &swapped,
|
||||
const SurfaceElementIndex t1, const int edge, const int t, Array<int,PointIndex> &pdef, const bool check_only=false);
|
||||
void EdgeSwapping (Mesh & mesh, int usemetric);
|
||||
void CombineImprove (Mesh & mesh);
|
||||
void SplitImprove (Mesh & mesh);
|
||||
|
||||
@ -21,6 +21,7 @@ namespace netgen
|
||||
|
||||
void MeshOptimize2d :: GenericImprove (Mesh & mesh)
|
||||
{
|
||||
static Timer timer("MeshOptimize2d::GenericImprove"); RegionTimer reg(timer);
|
||||
if (!faceindex)
|
||||
{
|
||||
if (writestatus)
|
||||
|
||||
@ -6205,14 +6205,19 @@ namespace netgen
|
||||
{
|
||||
for (PointIndex pi : myrange)
|
||||
QuickSort(elementsonnode[pi]);
|
||||
});
|
||||
}, ngcore::TasksPerThread(4));
|
||||
|
||||
return move(elementsonnode);
|
||||
}
|
||||
|
||||
Table<SurfaceElementIndex, PointIndex> Mesh :: CreatePoint2SurfaceElementTable() const
|
||||
Table<SurfaceElementIndex, PointIndex> Mesh :: CreatePoint2SurfaceElementTable( int faceindex ) const
|
||||
{
|
||||
static Timer timer("Mesh::CreatePoint2SurfaceElementTable"); RegionTimer rt(timer);
|
||||
|
||||
TableCreator<SurfaceElementIndex, PointIndex> creator(GetNP());
|
||||
|
||||
if(faceindex==0)
|
||||
{
|
||||
for ( ; !creator.Done(); creator++)
|
||||
ngcore::ParallelForRange
|
||||
(Range(surfelements), [&] (auto myrange)
|
||||
@ -6220,7 +6225,21 @@ namespace netgen
|
||||
for (SurfaceElementIndex ei : myrange)
|
||||
for (PointIndex pi : (*this)[ei].PNums())
|
||||
creator.Add (pi, ei);
|
||||
});
|
||||
}, ngcore::TasksPerThread(4));
|
||||
}
|
||||
else
|
||||
{
|
||||
Array<SurfaceElementIndex> face_els;
|
||||
GetSurfaceElementsOfFace(faceindex, face_els);
|
||||
for ( ; !creator.Done(); creator++)
|
||||
ngcore::ParallelForRange
|
||||
(Range(face_els), [&] (auto myrange)
|
||||
{
|
||||
for (auto i : myrange)
|
||||
for (PointIndex pi : (*this)[face_els[i]].PNums())
|
||||
creator.Add (pi, face_els[i]);
|
||||
}, ngcore::TasksPerThread(4));
|
||||
}
|
||||
|
||||
auto elementsonnode = creator.MoveTable();
|
||||
ngcore::ParallelForRange
|
||||
|
||||
@ -762,7 +762,7 @@ namespace netgen
|
||||
|
||||
|
||||
Table<ElementIndex, PointIndex> CreatePoint2ElementTable() const;
|
||||
Table<SurfaceElementIndex, PointIndex> CreatePoint2SurfaceElementTable() const;
|
||||
Table<SurfaceElementIndex, PointIndex> CreatePoint2SurfaceElementTable( int faceindex=0 ) const;
|
||||
|
||||
DLL_HEADER bool PureTrigMesh (int faceindex = 0) const;
|
||||
DLL_HEADER bool PureTetMesh () const;
|
||||
|
||||
@ -306,7 +306,6 @@ int STLSurfaceMeshing (STLGeometry & geom, class Mesh & mesh, const MeshingParam
|
||||
|
||||
mesh.CalcSurfacesOfNode();
|
||||
optmesh.EdgeSwapping (mesh, 0);
|
||||
mesh.CalcSurfacesOfNode();
|
||||
optmesh.ImproveMesh (mesh, mparam);
|
||||
}
|
||||
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
@ -58,6 +58,8 @@ def getMeshingparameters(filename):
|
||||
return standard[:3] # this gets too big for finer meshsizes
|
||||
if filename == "screw.step":
|
||||
return standard[3:] # coarser meshes don't work here
|
||||
if filename == "part1.stl":
|
||||
return standard[0:1] + standard[2:] # very coarse does not work
|
||||
return standard
|
||||
|
||||
_geofiles = [f for f in getFiles(".geo")] + [f for f in getFiles(".stl")]
|
||||
|
||||
Loading…
Reference in New Issue
Block a user