X-Git-Url: http://git.salome-platform.org/gitweb/?a=blobdiff_plain;f=src%2FMEDCoupling%2FMEDCouplingVoronoi.cxx;h=2393d5512a0a9fc3d7b25d6ab9ad7c8b26cd702c;hb=e7a9d4f59978fd384ee98db1dfdd5ec2118331ca;hp=7ec022a57539b9725ccbb90fbd0603fab3c92733;hpb=331685311f395c0b0654223c1cffddd254ed49cb;p=tools%2Fmedcoupling.git

diff --git a/src/MEDCoupling/MEDCouplingVoronoi.cxx b/src/MEDCoupling/MEDCouplingVoronoi.cxx
old mode 100644
new mode 100755
index 7ec022a57..2393d5512
--- a/src/MEDCoupling/MEDCouplingVoronoi.cxx
+++ b/src/MEDCoupling/MEDCouplingVoronoi.cxx
@@ -1,4 +1,4 @@
-// Copyright (C) 2007-2017  CEA/DEN, EDF R&D
+// Copyright (C) 2007-2020  CEA/DEN, EDF R&D
 //
 // This library is free software; you can redistribute it and/or
 // modify it under the terms of the GNU Lesser General Public
@@ -21,10 +21,34 @@
 #include "MEDCouplingVoronoi.hxx"
 #include "MEDCoupling1GTUMesh.hxx"
 #include "MEDCouplingCMesh.hxx"
+#include "MEDCouplingFieldDouble.hxx"
 #include "MCAuto.txx"
 
+#include "MEDCouplingNormalizedUnstructuredMesh.txx"
+#include "Interpolation2D.txx"
+#include "Interpolation3DSurf.hxx"
+
 using namespace MEDCoupling;
 
+Voronizer::~Voronizer()
+{
+}
+
+int Voronizer1D::getDimension() const
+{
+  return 1;
+}
+
+int Voronizer2D::getDimension() const
+{
+  return 2;
+}
+
+int Voronizer3D::getDimension() const
+{
+  return 3;
+}
+
 MCAuto<MEDCouplingUMesh> ComputeBigCellFrom(const double pt1[2], const double pt2[2], const std::vector<double>& bbox, double eps)
 {
   static const double FACT=1.2;
@@ -51,25 +75,67 @@ MCAuto<MEDCouplingUMesh> ComputeBigCellFrom(const double pt1[2], const double pt
     line->setCoords(coo);
   }
   line->allocateCells();
-  static const int CONN[2]={0,1};
+  static const mcIdType CONN[2]={0,1};
   line->insertNextCell(INTERP_KERNEL::NORM_SEG2,2,CONN);
   MCAuto<MEDCouplingUMesh> sp2,sp1;
   {
-    DataArrayInt *cellNb1(0),*cellNb2(0);
+    DataArrayIdType *cellNb1(0),*cellNb2(0);
     MEDCouplingUMesh *sp2Pt(0),*sp1Pt(0);
     MEDCouplingUMesh::Intersect2DMeshWith1DLine(mu,line,eps,sp2Pt,sp1Pt,cellNb1,cellNb2);
     sp1=sp1Pt; sp2=sp2Pt;
-    MCAuto<DataArrayInt> cellNb10(cellNb1),cellNb20(cellNb2);
+    MCAuto<DataArrayIdType> cellNb10(cellNb1),cellNb20(cellNb2);
   }
-  std::vector<int> ccp;
+  std::vector<mcIdType> ccp;
   sp2->getCellsContainingPoint(pt1,eps,ccp);
   if(ccp.size()!=1)
     throw INTERP_KERNEL::Exception("ComputeBigCellFrom : expected single element !");
   MCAuto<MEDCouplingUMesh> ret(sp2->buildPartOfMySelfSlice(ccp[0],ccp[0]+1,1,true));
   ret->zipCoords();
+  {
+    MCAuto<MEDCouplingFieldDouble> tmp(ret->getMeasureField(false));
+    if(tmp->getArray()->getIJ(0,0)<0)
+      ret->invertOrientationOfAllCells();
+  }
   return ret;
 }
 
+
+MCAuto<MEDCouplingUMesh> MergeVorCells2D(MEDCouplingUMesh *p, double eps, bool isZip)
+{
+  MCAuto<DataArrayIdType> edgeToKeep;
+  MCAuto<MEDCouplingUMesh> p0;
+  {
+    MCAuto<DataArrayIdType> d(DataArrayIdType::New()),di(DataArrayIdType::New()),rd(DataArrayIdType::New()),rdi(DataArrayIdType::New());
+    p0=p->buildDescendingConnectivity(d,di,rd,rdi);
+    MCAuto<DataArrayIdType> dsi(rdi->deltaShiftIndex());
+    edgeToKeep=dsi->findIdsEqual(1);
+  }
+  MCAuto<MEDCouplingUMesh> skinOfRes(p0->buildPartOfMySelf(edgeToKeep->begin(),edgeToKeep->end()));
+  if(isZip)
+    {
+      skinOfRes->zipCoords();
+      if(ToIdType(skinOfRes->getNumberOfCells())!=skinOfRes->getNumberOfNodes())
+        throw INTERP_KERNEL::Exception("MergeVorCells : result of merge looks bad !");
+    }
+  MCAuto<DataArrayIdType> d(skinOfRes->orderConsecutiveCells1D());
+  MCAuto<MEDCoupling1SGTUMesh> skinOfRes2;
+  {
+    MCAuto<MEDCouplingUMesh> part(skinOfRes->buildPartOfMySelf(d->begin(),d->end()));
+    skinOfRes2=MEDCoupling1SGTUMesh::New(part);
+  }
+  MCAuto<DataArrayIdType> c(skinOfRes2->getNodalConnectivity()->deepCopy());
+  c->circularPermutation(1);
+  c->rearrange(2);
+  std::vector< MCAuto<DataArrayIdType> > vdi(c->explodeComponents());
+  if(!vdi[0]->isEqual(*vdi[1]))
+    throw INTERP_KERNEL::Exception("MergeVorCells : internal error !");
+  MCAuto<MEDCouplingUMesh> m(MEDCouplingUMesh::New("",2));
+  m->setCoords(skinOfRes2->getCoords());
+  m->allocateCells();
+  m->insertNextCell(INTERP_KERNEL::NORM_POLYGON,vdi[0]->getNumberOfTuples(),vdi[0]->begin());
+  return m;
+}
+
 MCAuto<MEDCouplingUMesh> MergeVorCells(const std::vector< MCAuto<MEDCouplingUMesh> >& vcs, double eps)
 {
   std::size_t sz(vcs.size());
@@ -84,41 +150,226 @@ MCAuto<MEDCouplingUMesh> MergeVorCells(const std::vector< MCAuto<MEDCouplingUMes
   }
   p->zipCoords();
   {
-    bool dummy; int dummy2;
-    MCAuto<DataArrayInt> dummy3(p->mergeNodes(eps,dummy,dummy2));
+    bool dummy; mcIdType dummy2;
+    MCAuto<DataArrayIdType> dummy3(p->mergeNodes(eps,dummy,dummy2));
   }
-  MCAuto<DataArrayInt> edgeToKeep;
+  return MergeVorCells2D(p,eps,true);
+}
+
+/*!
+ * suppress additional sub points on edges
+ */
+MCAuto<MEDCouplingUMesh> SimplifyPolygon(const MEDCouplingUMesh *m, double eps)
+{
+  if(m->getNumberOfCells()!=1)
+    throw INTERP_KERNEL::Exception("SimplifyPolygon : internal error !");
+  const mcIdType *conn(m->getNodalConnectivity()->begin()),*conni(m->getNodalConnectivityIndex()->begin());
+  mcIdType nbPtsInPolygon(conni[1]-conni[0]-1);
+  const double *coo(m->getCoords()->begin());
+  std::vector<mcIdType> resConn;
+  for(mcIdType i=0;i<nbPtsInPolygon;i++)
+    {
+      mcIdType prev(conn[(i+nbPtsInPolygon-1)%nbPtsInPolygon+1]),current(conn[i%nbPtsInPolygon+1]),zeNext(conn[(i+1)%nbPtsInPolygon+1]);
+      double a[3]={
+        coo[3*prev+0]-coo[3*current+0],
+        coo[3*prev+1]-coo[3*current+1],
+        coo[3*prev+2]-coo[3*current+2],
+      },b[3]={
+        coo[3*current+0]-coo[3*zeNext+0],
+        coo[3*current+1]-coo[3*zeNext+1],
+        coo[3*current+2]-coo[3*zeNext+2],
+      };
+      double c[3]={a[1]*b[2]-a[2]*b[1], a[2]*b[0]-a[0]*b[2], a[0]*b[1]-a[1]*b[0]};
+      if(sqrt(c[0]*c[0]+c[1]*c[1]+c[2]*c[2])>eps)
+        resConn.push_back(current);
+    }
+  MCAuto<MEDCouplingUMesh> ret(MEDCouplingUMesh::New("",2));
+  ret->setCoords(m->getCoords());
+  ret->allocateCells();
+  ret->insertNextCell(INTERP_KERNEL::NORM_POLYGON,ToIdType(resConn.size()),&resConn[0]);
+  return ret;
+}
+
+MCAuto<MEDCouplingUMesh> MergeVorCells3D(const std::vector< MCAuto<MEDCouplingUMesh> >& vcs, double eps)
+{
+  std::size_t sz(vcs.size());
+  if(sz<1)
+    throw INTERP_KERNEL::Exception("MergeVorCells : len of input vec expected to be >= 1 !");
+  if(sz==1)
+    return vcs[0];
+  MCAuto<MEDCouplingUMesh> p;
+  {
+    std::vector< const MEDCouplingUMesh * > vcsBis(VecAutoToVecOfCstPt(vcs));
+    p=MEDCouplingUMesh::MergeUMeshes(vcsBis);
+  }
+  p->zipCoords();
+  {
+    bool dummy; mcIdType dummy2;
+    MCAuto<DataArrayIdType> dummy3(p->mergeNodes(eps,dummy,dummy2));
+  }
+  MCAuto<DataArrayIdType> edgeToKeep;
   MCAuto<MEDCouplingUMesh> p0;
   {
-    MCAuto<DataArrayInt> d(DataArrayInt::New()),di(DataArrayInt::New()),rd(DataArrayInt::New()),rdi(DataArrayInt::New());
+    MCAuto<DataArrayIdType> d(DataArrayIdType::New()),di(DataArrayIdType::New()),rd(DataArrayIdType::New()),rdi(DataArrayIdType::New());
     p0=p->buildDescendingConnectivity(d,di,rd,rdi);
-    MCAuto<DataArrayInt> dsi(rdi->deltaShiftIndex());
+    MCAuto<DataArrayIdType> dsi(rdi->deltaShiftIndex());
     edgeToKeep=dsi->findIdsEqual(1);
   }
   MCAuto<MEDCouplingUMesh> skinOfRes(p0->buildPartOfMySelf(edgeToKeep->begin(),edgeToKeep->end()));
-  skinOfRes->zipCoords();
-  if(skinOfRes->getNumberOfCells()!=skinOfRes->getNumberOfNodes())
-    throw INTERP_KERNEL::Exception("MergeVorCells : result of merge looks bad !");
-  MCAuto<DataArrayInt> d(skinOfRes->orderConsecutiveCells1D());
-  MCAuto<MEDCoupling1SGTUMesh> skinOfRes2;
+  MCAuto<DataArrayDouble> eqn(skinOfRes->computePlaneEquationOf3DFaces());
+  MCAuto<DataArrayIdType> comm,commI;
   {
-    MCAuto<MEDCouplingUMesh> part(skinOfRes->buildPartOfMySelf(d->begin(),d->end()));
-    skinOfRes2=MEDCoupling1SGTUMesh::New(part);
+    DataArrayIdType *a(0),*b(0);
+    eqn->findCommonTuples(eps,0,a,b);
+    comm=a; commI=b;
+    //comm=DataArrayIdType::New(); comm->alloc(0,1); commI=DataArrayIdType::New(); commI->alloc(1,1); commI->setIJ(0,0,0);
   }
-  MCAuto<DataArrayInt> c(skinOfRes2->getNodalConnectivity()->deepCopy());
-  c->circularPermutation(1);
-  c->rearrange(2);
-  std::vector< MCAuto<DataArrayInt> > vdi(c->explodeComponents());
-  if(!vdi[0]->isEqual(*vdi[1]))
-    throw INTERP_KERNEL::Exception("MergeVorCells : internal error !");
-  MCAuto<MEDCouplingUMesh> m(MEDCouplingUMesh::New("",2));
-  m->setCoords(skinOfRes2->getCoords());
-  m->allocateCells();
-  m->insertNextCell(INTERP_KERNEL::NORM_POLYGON,vdi[0]->getNumberOfTuples(),vdi[0]->begin());
-  return m;
+  MCAuto<MEDCouplingUMesh> ret(MEDCouplingUMesh::New("",3));
+  ret->setCoords(skinOfRes->getCoords());
+  ret->allocateCells();
+  std::vector<mcIdType> conn;
+  int jj(0);
+  for(mcIdType i=0;i<commI->getNumberOfTuples()-1;i++,jj++)
+    {
+      if(jj!=0)
+        conn.push_back(-1);
+      MCAuto<MEDCouplingUMesh> tmp(skinOfRes->buildPartOfMySelf(comm->begin()+commI->getIJ(i,0),comm->begin()+commI->getIJ(i+1,0),true));
+      MCAuto<MEDCouplingUMesh> tmp2;
+      if(commI->getIJ(i+1,0)-commI->getIJ(i,0)==1)
+        tmp2=tmp;
+      else
+        tmp2=MergeVorCells2D(tmp,eps,false);
+      tmp2=SimplifyPolygon(tmp2,eps);
+      const mcIdType *cPtr(tmp2->getNodalConnectivity()->begin()),*ciPtr(tmp2->getNodalConnectivityIndex()->begin());
+      conn.insert(conn.end(),cPtr+1,cPtr+ciPtr[1]);
+    }
+  MCAuto<DataArrayIdType> remain(comm->buildComplement(ToIdType(skinOfRes->getNumberOfCells())));
+  {
+    MCAuto<MEDCouplingUMesh> tmp(skinOfRes->buildPartOfMySelf(remain->begin(),remain->end(),true));
+    const mcIdType *cPtr(tmp->getNodalConnectivity()->begin()),*ciPtr(tmp->getNodalConnectivityIndex()->begin());
+    for(mcIdType i=0;i<remain->getNumberOfTuples();i++,jj++)
+      {
+        if(jj!=0)
+          conn.push_back(-1);
+        conn.insert(conn.end(),cPtr+ciPtr[i]+1,cPtr+ciPtr[i+1]);
+      }
+  }
+  ret->insertNextCell(INTERP_KERNEL::NORM_POLYHED,ToIdType(conn.size()),&conn[0]);
+  return ret;
+}
+
+MCAuto<MEDCouplingUMesh> MergeVorCells1D(const std::vector< MCAuto<MEDCouplingUMesh> >& vcs, double eps)
+{
+  static const mcIdType CONN_SEG2_DFT[2]={0,1};
+  if(vcs.empty())
+    throw INTERP_KERNEL::Exception("MergeVorCells1D : internal error 1 !");
+  if(vcs.size()==1)
+    return vcs[0];
+  if(vcs.size()>2)
+    throw INTERP_KERNEL::Exception("MergeVorCells1D : internal error 2 !");
+  double a0,b0,a1,b1;
+  {
+    const mcIdType *connPtr(vcs[0]->getNodalConnectivity()->begin());
+    const double *coordPtr(vcs[0]->getCoords()->begin());
+    a0=coordPtr[connPtr[1]]; b0=coordPtr[connPtr[2]];
+  }
+  {
+    const mcIdType *connPtr(vcs[1]->getNodalConnectivity()->begin());
+    const double *coordPtr(vcs[1]->getCoords()->begin());
+    a1=coordPtr[connPtr[1]]; b1=coordPtr[connPtr[2]];
+  }
+  MCAuto<MEDCouplingUMesh> ret(MEDCouplingUMesh::New("",1)); ret->allocateCells(); ret->insertNextCell(INTERP_KERNEL::NORM_SEG2,2,CONN_SEG2_DFT);
+  MCAuto<DataArrayDouble> coo(DataArrayDouble::New()); coo->alloc(2,1); ret->setCoords(coo);
+  if(fabs(b0-a1)<eps)
+    { coo->setIJ(0,0,a0); coo->setIJ(1,0,b1); }
+  else if(fabs(b1-a0)<eps)
+    { coo->setIJ(0,0,b0); coo->setIJ(1,0,a1); }
+  return ret;
+}
+
+MCAuto<MEDCouplingUMesh> MEDCoupling::Voronizer1D::doIt(const MEDCouplingUMesh *m, const DataArrayDouble *points, double eps) const
+{
+  static const mcIdType CONN_SEG2_DFT[2]={0,1};
+  if(!m || !points)
+    throw INTERP_KERNEL::Exception("Voronoize1D : null pointer !");
+  m->checkConsistencyLight();
+  points->checkAllocated();
+  if(m->getMeshDimension()!=1 || m->getSpaceDimension()!=1 || points->getNumberOfComponents()!=1)
+    throw INTERP_KERNEL::Exception("Voronoize1D : spacedim must be equal to 1 and meshdim also equal to 1 !");
+  if(m->getNumberOfCells()!=1)
+    throw INTERP_KERNEL::Exception("Voronoize1D : mesh is expected to have only one cell !");
+  mcIdType nbPts(points->getNumberOfTuples());
+  if(nbPts<1)
+    throw INTERP_KERNEL::Exception("Voronoize1D : at least one point expected !");
+  std::vector<double> bbox(4);
+  m->getBoundingBox(&bbox[0]);
+  std::vector< MCAuto<MEDCouplingUMesh> > l0(1,MCAuto<MEDCouplingUMesh>(m->deepCopy()));
+  const double *pts(points->begin());
+  for(mcIdType i=1;i<nbPts;i++)
+    {
+      MCAuto<MEDCouplingUMesh> vorTess;
+      {
+        std::vector< const MEDCouplingUMesh * > l0Bis(VecAutoToVecOfCstPt(l0));
+        vorTess=MEDCouplingUMesh::MergeUMeshes(l0Bis);
+      }
+      {
+        bool dummy;
+        mcIdType newNbNodes;
+        MCAuto<DataArrayIdType> dummy3(vorTess->mergeNodes(eps,dummy,newNbNodes));
+      }
+      std::vector<mcIdType> polygsToIterOn;
+      const double *pt(pts+i);
+      vorTess->getCellsContainingPoint(pt,eps,polygsToIterOn);
+      if(polygsToIterOn.empty())
+        throw INTERP_KERNEL::Exception("Voronoize1D : a point is outside domain !");
+      if(polygsToIterOn.size()>2)
+        throw INTERP_KERNEL::Exception("Voronoize1D : overlap of points !");
+      std::vector< MCAuto<MEDCouplingUMesh> > newVorCells;
+      for(std::vector<mcIdType>::const_iterator it=polygsToIterOn.begin();it!=polygsToIterOn.end();it++)
+        {
+          mcIdType poly(*it);
+          //
+          double seed(pts[poly]),zept(*pt);
+          double mid((seed+zept)/2.);
+          //
+          MCAuto<MEDCouplingUMesh> tile(l0[poly]);
+          tile->zipCoords();
+          double a,b;
+          {
+            const mcIdType *connPtr(tile->getNodalConnectivity()->begin());
+            const double *coordPtr(tile->getCoords()->begin());
+            a=coordPtr[connPtr[1]]; b=coordPtr[connPtr[2]];
+          }
+          double pol0[2],pol1[2];
+          MCAuto<DataArrayDouble> t0(DataArrayDouble::New()); t0->alloc(3,1); t0->setIJ(0,0,zept); t0->setIJ(1,0,mid); t0->setIJ(2,0,seed);
+          t0->applyLin(1.,-a);
+          if(t0->isMonotonic(true,eps))
+            { pol0[0]=a; pol0[1]=mid; pol1[0]=mid; pol1[1]=b; }
+          else
+            { pol1[0]=a; pol1[1]=mid; pol0[0]=mid; pol0[1]=b; }
+          MCAuto<MEDCouplingUMesh> modifiedCell(MEDCouplingUMesh::New("",1)); modifiedCell->allocateCells();
+          MCAuto<DataArrayDouble> coo1(DataArrayDouble::New()); coo1->alloc(2,1); coo1->setIJ(0,0,pol1[0]); coo1->setIJ(1,0,pol1[1]);
+          modifiedCell->setCoords(coo1); modifiedCell->insertNextCell(INTERP_KERNEL::NORM_SEG2,2,CONN_SEG2_DFT);
+          //
+          MCAuto<MEDCouplingUMesh> newVorCell(MEDCouplingUMesh::New("",1)); newVorCell->allocateCells();
+          MCAuto<DataArrayDouble> coo2(DataArrayDouble::New()); coo2->alloc(2,1); coo2->setIJ(0,0,pol0[0]); coo2->setIJ(1,0,pol0[1]);
+          newVorCell->setCoords(coo2); newVorCell->insertNextCell(INTERP_KERNEL::NORM_SEG2,2,CONN_SEG2_DFT);
+          //
+          l0[poly]=modifiedCell;
+          newVorCells.push_back(newVorCell);
+        }
+      l0.push_back(MergeVorCells1D(newVorCells,eps));
+    }
+  std::vector< const MEDCouplingUMesh * > l0Bis(VecAutoToVecOfCstPt(l0));
+  MCAuto<MEDCouplingUMesh> ret(MEDCouplingUMesh::MergeUMeshes(l0Bis));
+  {
+    bool dummy; mcIdType dummy2;
+    MCAuto<DataArrayIdType> dummy3(ret->mergeNodes(eps,dummy,dummy2));
+  }
+  return ret;
 }
 
-MCAuto<MEDCouplingUMesh> MEDCoupling::Voronoize2D(const MEDCouplingUMesh *m, const DataArrayDouble *points, double eps)
+MCAuto<MEDCouplingUMesh> MEDCoupling::Voronizer2D::doIt(const MEDCouplingUMesh *m, const DataArrayDouble *points, double eps) const
 {
   if(!m || !points)
     throw INTERP_KERNEL::Exception("Voronoize2D : null pointer !");
@@ -128,14 +379,14 @@ MCAuto<MEDCouplingUMesh> MEDCoupling::Voronoize2D(const MEDCouplingUMesh *m, con
     throw INTERP_KERNEL::Exception("Voronoize2D : spacedim must be equal to 2 and meshdim also equal to 2 !");
   if(m->getNumberOfCells()!=1)
     throw INTERP_KERNEL::Exception("Voronoize2D : mesh is expected to have only one cell !");
-  int nbPts(points->getNumberOfTuples());
+  mcIdType nbPts(points->getNumberOfTuples());
   if(nbPts<1)
     throw INTERP_KERNEL::Exception("Voronoize2D : at least one point expected !");
   std::vector<double> bbox(4);
   m->getBoundingBox(&bbox[0]);
   std::vector< MCAuto<MEDCouplingUMesh> > l0(1,MCAuto<MEDCouplingUMesh>(m->deepCopy()));
   const double *pts(points->begin());
-  for(int i=1;i<nbPts;i++)
+  for(mcIdType i=1;i<nbPts;i++)
     {
       MCAuto<MEDCouplingUMesh> vorTess;
       {
@@ -144,46 +395,51 @@ MCAuto<MEDCouplingUMesh> MEDCoupling::Voronoize2D(const MEDCouplingUMesh *m, con
       }
       {
         bool dummy;
-        int newNbNodes;
-        MCAuto<DataArrayInt> dummy3(vorTess->mergeNodes(eps,dummy,newNbNodes));
+        mcIdType newNbNodes;
+        MCAuto<DataArrayIdType> dummy3(vorTess->mergeNodes(eps,dummy,newNbNodes));
       }
-      std::vector<int> polygsToIterOn;
+      std::vector<mcIdType> polygsToIterOn;
       const double *pt(pts+i*2);
       vorTess->getCellsContainingPoint(pt,eps,polygsToIterOn);
       if(polygsToIterOn.size()<1)
         throw INTERP_KERNEL::Exception("Voronoize2D : presence of a point outside the given cell !");
-      std::set<int> elemsToDo,elemsDone; elemsToDo.insert(polygsToIterOn[0]);
+      std::set<mcIdType> elemsToDo,elemsDone; elemsToDo.insert(polygsToIterOn[0]);
       std::vector< MCAuto<MEDCouplingUMesh> > newVorCells;
       while(!elemsToDo.empty())
         {
-          int poly(*elemsToDo.begin()); elemsToDo.erase(elemsToDo.begin()); elemsDone.insert(poly);
+          mcIdType poly(*elemsToDo.begin()); elemsToDo.erase(elemsToDo.begin()); elemsDone.insert(poly);
           const double *seed(pts+2*poly);
           MCAuto<MEDCouplingUMesh> cell(ComputeBigCellFrom(pt,seed,bbox,eps));
           MCAuto<MEDCouplingUMesh> tile(l0[poly]);
           tile->zipCoords();
           MCAuto<MEDCouplingUMesh> a;
-          MCAuto<DataArrayInt> b,c;
+          MCAuto<DataArrayIdType> b,c;
           {
-            DataArrayInt *bPtr(0),*cPtr(0);
+            DataArrayIdType *bPtr(0),*cPtr(0);
             a=MEDCouplingUMesh::Intersect2DMeshes(tile,cell,eps,bPtr,cPtr);
             b=bPtr; c=cPtr;
           }
-          MCAuto<DataArrayInt> part(c->findIdsEqual(-1));
+          MCAuto<DataArrayIdType> part(c->findIdsEqual(-1));
           if(part->getNumberOfTuples()!=1)
             throw INTERP_KERNEL::Exception("Voronoize2D : internal error");
           MCAuto<MEDCouplingUMesh> newVorCell;
           {
-            MCAuto<DataArrayInt> tmp(part->buildComplement(a->getNumberOfCells()));
+            MCAuto<DataArrayIdType> tmp(part->buildComplement(ToIdType(a->getNumberOfCells())));
             newVorCell=a->buildPartOfMySelf(tmp->begin(),tmp->end());
           }
           newVorCell->zipCoords();
           MCAuto<MEDCouplingUMesh> modifiedCell(a->buildPartOfMySelf(part->begin(),part->end()));
           modifiedCell->zipCoords();
+          {
+            MCAuto<MEDCouplingFieldDouble> tmp(modifiedCell->getMeasureField(false));
+            if(tmp->getArray()->getIJ(0,0)<0)
+              modifiedCell->invertOrientationOfAllCells();
+          }
           l0[poly]=modifiedCell;
           //
-          MCAuto<DataArrayInt> ids;
+          MCAuto<DataArrayIdType> ids;
           {
-            DataArrayInt *tmp(0);
+            DataArrayIdType *tmp(0);
             bool sta(a->getCoords()->areIncludedInMe(cell->getCoords(),eps,tmp));
             ids=tmp;
             if(!sta)
@@ -191,28 +447,115 @@ MCAuto<MEDCouplingUMesh> MEDCoupling::Voronoize2D(const MEDCouplingUMesh *m, con
           }
           MCAuto<DataArrayDouble> newCoords;
           {
-            MCAuto<DataArrayInt> tmp(ids->buildComplement(a->getNumberOfNodes()));
+            MCAuto<DataArrayIdType> tmp(ids->buildComplement(a->getNumberOfNodes()));
             newCoords=a->getCoords()->selectByTupleId(tmp->begin(),tmp->end());
           }
           const double *cPtr(newCoords->begin());
-          for(int i=0;i<newCoords->getNumberOfTuples();i++,cPtr+=2)
+          for(mcIdType j=0;j<newCoords->getNumberOfTuples();j++,cPtr+=2)
             {
-              std::set<int> zeCandidates;
+              std::set<mcIdType> zeCandidates;
               {
-                std::vector<int> zeCandidatesTmp;
+                std::vector<mcIdType> zeCandidatesTmp;
                 vorTess->getCellsContainingPoint(cPtr,eps,zeCandidatesTmp);
                 zeCandidates.insert(zeCandidatesTmp.begin(),zeCandidatesTmp.end());
               }
-              std::set<int> tmp,newElementsToDo;
-              std::set_difference(zeCandidates.begin(),zeCandidates.end(),elemsDone.begin(),elemsDone.end(),std::inserter(tmp,tmp.begin()));
-              std::set_union(elemsToDo.begin(),elemsToDo.end(),tmp.begin(),tmp.end(),std::inserter(newElementsToDo,newElementsToDo.begin()));
+              std::set<mcIdType> tmp2,newElementsToDo;
+              std::set_difference(zeCandidates.begin(),zeCandidates.end(),elemsDone.begin(),elemsDone.end(),std::inserter(tmp2,tmp2.begin()));
+              std::set_union(elemsToDo.begin(),elemsToDo.end(),tmp2.begin(),tmp2.end(),std::inserter(newElementsToDo,newElementsToDo.begin()));
               elemsToDo=newElementsToDo;
             }
           newVorCells.push_back(newVorCell);
         }
-      l0.push_back(MergeVorCells(newVorCells,eps));
+      MCAuto<MEDCouplingUMesh> mergedVorCell(MergeVorCells(newVorCells,eps));
+      {
+        MCAuto<MEDCouplingFieldDouble> tmp(mergedVorCell->getMeasureField(false));
+        if(tmp->getArray()->getIJ(0,0)<0)
+          mergedVorCell->invertOrientationOfAllCells();
+      }
+      l0.push_back(mergedVorCell);
     }
   std::vector< const MEDCouplingUMesh * > l0Bis(VecAutoToVecOfCstPt(l0));
   MCAuto<MEDCouplingUMesh> ret(MEDCouplingUMesh::MergeUMeshes(l0Bis));
+  {
+    bool dummy; mcIdType dummy2;
+    MCAuto<DataArrayIdType> dummy3(ret->mergeNodes(eps,dummy,dummy2));
+  }
+  return ret;
+}
+
+MCAuto<MEDCouplingUMesh> Split3DCellInParts(const MEDCouplingUMesh *m, const double pt[3], const double seed[3], double eps, mcIdType tmp[2])
+{
+  if(m->getMeshDimension()!=3 || m->getSpaceDimension()!=3 || m->getNumberOfCells()!=1)
+    throw INTERP_KERNEL::Exception("Split3DCellInParts : expecting a 3D with exactly one cell !");
+  double middle[3]={(pt[0]+seed[0])/2.,(pt[1]+seed[1])/2.,(pt[2]+seed[2])/2.};
+  double vec[3]={pt[0]-seed[0],pt[1]-seed[1],pt[2]-seed[2]};
+  MCAuto<MEDCouplingUMesh> res(m->clipSingle3DCellByPlane(middle,vec,eps));
+  return res;
+}
+
+MCAuto<MEDCouplingUMesh> MEDCoupling::Voronizer3D::doIt(const MEDCouplingUMesh *m, const DataArrayDouble *points, double eps) const
+{
+  //double eps2(1.-sqrt(eps));// 2nd eps for interpolation. Here the eps is computed to feet cos(eps) ~ 1-eps^2
+  if(!m || !points)
+    throw INTERP_KERNEL::Exception("Voronoize3D : null pointer !");
+  m->checkConsistencyLight();
+  points->checkAllocated();
+  if(m->getMeshDimension()!=3 || m->getSpaceDimension()!=3 || points->getNumberOfComponents()!=3)
+    throw INTERP_KERNEL::Exception("Voronoize3D : spacedim must be equal to 3 and meshdim also equal to 3 !");
+  if(m->getNumberOfCells()!=1)
+    throw INTERP_KERNEL::Exception("Voronoize3D : mesh is expected to have only one cell !");
+  mcIdType nbPts(points->getNumberOfTuples());
+  if(nbPts<1)
+    throw INTERP_KERNEL::Exception("Voronoize3D : at least one point expected !");
+  std::vector< MCAuto<MEDCouplingUMesh> > l0(1,MCAuto<MEDCouplingUMesh>(m->deepCopy()));
+  const double *pts(points->begin());
+  for(mcIdType i=1;i<nbPts;i++)
+    {
+      MCAuto<MEDCouplingUMesh> vorTess;
+      {
+        std::vector< const MEDCouplingUMesh * > l0Bis(VecAutoToVecOfCstPt(l0));
+        vorTess=MEDCouplingUMesh::MergeUMeshes(l0Bis);
+      }
+      {
+        bool dummy;
+        mcIdType newNbNodes;
+        MCAuto<DataArrayIdType> dummy3(vorTess->mergeNodes(eps,dummy,newNbNodes));
+      }
+      std::vector<mcIdType> polygsToIterOn;
+      const double *pt(pts+i*3);
+      vorTess->getCellsContainingPoint(pt,eps,polygsToIterOn);
+      if(polygsToIterOn.size()<1)
+        throw INTERP_KERNEL::Exception("Voronoize3D : presence of a point outside the given cell !");
+      std::vector< MCAuto<MEDCouplingUMesh> > newVorCells;
+      for(mcIdType poly=0;poly<ToIdType(vorTess->getNumberOfCells());poly++)
+        {
+          const double *seed(pts+3*poly);
+          MCAuto<MEDCouplingUMesh> tile(l0[poly]);
+          tile->zipCoords();
+          mcIdType tmp[2];
+          MCAuto<MEDCouplingUMesh> cells;
+          try
+            {
+              cells=Split3DCellInParts(tile,pt,seed,eps,tmp);
+            }
+          catch(INTERP_KERNEL::Exception&)
+            {
+              continue;
+            }
+          MCAuto<MEDCouplingUMesh> newVorCell(cells->buildPartOfMySelfSlice(1,2,1,true));
+          newVorCell->zipCoords();
+          MCAuto<MEDCouplingUMesh> modifiedCell(cells->buildPartOfMySelfSlice(0,1,1,true));
+          modifiedCell->zipCoords();
+          newVorCells.push_back(newVorCell);
+          l0[poly]=modifiedCell;
+        }
+      l0.push_back(MergeVorCells3D(newVorCells,eps));
+    }
+  std::vector< const MEDCouplingUMesh * > l0Bis(VecAutoToVecOfCstPt(l0));
+  MCAuto<MEDCouplingUMesh> ret(MEDCouplingUMesh::MergeUMeshes(l0Bis));
+  {
+    bool dummy; mcIdType dummy2;
+    MCAuto<DataArrayIdType> dummy3(ret->mergeNodes(eps,dummy,dummy2));
+  }
   return ret;
 }