Copyrights update 2015.

[plugins/netgenplugin.git] / src / NETGENPlugin / NETGENPlugin_NETGEN_3D.cxx

diff --git a/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx b/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx
index 1a5ad5cf78be6d8eb1fef7b0bacd27ff89fd84f5..228e9bf6970ed85907b4ae89d51ed6120c5a9744 100644 (file)
--- a/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx
+++ b/src/NETGENPlugin/NETGENPlugin_NETGEN_3D.cxx
@@ -1,4 +1,4 @@
-// Copyright (C) 2007-2014  CEA/DEN, EDF R&D, OPEN CASCADE
+// Copyright (C) 2007-2015  CEA/DEN, EDF R&D, OPEN CASCADE
 //
 // Copyright (C) 2003-2007  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
 // CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
@@ -339,6 +339,78 @@ bool NETGENPlugin_NETGEN_3D::Compute(SMESH_Mesh&         aMesh,
   return ( ngLib._isComputeOk = compute( aMesh, helper, nodeVec, Netgen_mesh));
 }
 
+namespace
+{
+  void limitVolumeSize( netgen::Mesh* ngMesh,
+                        double        maxh )
+  {
+    // get average h of faces
+    double faceh = 0;
+    int nbh = 0;
+    for (int i = 1; i <= ngMesh->GetNSE(); i++)
+    {
+      const netgen::Element2d& face = ngMesh->SurfaceElement(i);
+      for (int j=1; j <= face.GetNP(); ++j)
+      {
+        const netgen::PointIndex & i1 = face.PNumMod(j);
+        const netgen::PointIndex & i2 = face.PNumMod(j+1);
+        if ( i1 < i2 )
+        {
+          const netgen::Point3d & p1 = ngMesh->Point( i1 );
+          const netgen::Point3d & p2 = ngMesh->Point( i2 );
+          faceh += netgen::Dist2( p1, p2 );
+          nbh++;
+        }
+      }
+    }
+    faceh = Sqrt( faceh / nbh );
+
+    double compareh;
+    if      ( faceh < 0.5 * maxh ) compareh = -1;
+    else if ( faceh > 1.5 * maxh ) compareh = 1;
+    else                           compareh = 0;
+    // cerr << "faceh " << faceh << endl;
+    // cerr << "init maxh " << maxh << endl;
+    // cerr << "compareh " << compareh << endl;
+
+    if ( compareh > 0 )
+      maxh *= 1.2;
+    else
+      maxh *= 0.8;
+    // cerr << "maxh " << maxh << endl;
+
+    // get bnd box
+    netgen::Point3d pmin, pmax;
+    ngMesh->GetBox( pmin, pmax, 0 );
+    const double dx = pmax.X() - pmin.X();
+    const double dy = pmax.Y() - pmin.Y();
+    const double dz = pmax.Z() - pmin.Z();
+
+    if ( ! & ngMesh->LocalHFunction() )
+      ngMesh->SetLocalH( pmin, pmax, compareh <= 0 ? 0.1 : 0.5 );
+
+    // adjusted by SALOME_TESTS/Grids/smesh/bugs_08/I8
+    const int nbX = Max( 2, int( dx / maxh * 2 ));
+    const int nbY = Max( 2, int( dy / maxh * 2 ));
+    const int nbZ = Max( 2, int( dz / maxh * 2 ));
+
+    netgen::Point3d p;
+    for ( int i = 0; i <= nbX; ++i )
+    {
+      p.X() = pmin.X() +  i * dx / nbX;
+      for ( int j = 0; j <= nbY; ++j )
+      {
+        p.Y() = pmin.Y() +  j * dy / nbY;
+        for ( int k = 0; k <= nbZ; ++k )
+        {
+          p.Z() = pmin.Z() +  k * dz / nbZ;
+          ngMesh->RestrictLocalH( p, maxh );
+        }
+      }
+    }
+  }
+}
+
 //================================================================================
 /*!
  * \brief set parameters and generate the volume mesh
@@ -374,6 +446,7 @@ bool NETGENPlugin_NETGEN_3D::compute(SMESH_Mesh&                     aMesh,
   else if ( _hypMaxElementVolume )
   {
     netgen::mparam.maxh = pow( 72, 1/6. ) * pow( _maxElementVolume, 1/3. );
+    // limitVolumeSize( ngMesh, netgen::mparam.maxh ); // result is unpredictable
   }
   else if ( aMesh.HasShapeToMesh() )
   {