-// Copyright (C) 2005 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
+// Copyright (C) 2007-2014 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
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
-// version 2.1 of the License.
+// version 2.1 of the License, or (at your option) any later version.
//
-// This library is distributed in the hope that it will be useful
+// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
//
+
// File: SMESH_MesherHelper.cxx
// Created: 15.02.06 15:22:41
// Author: Sergey KUUL
-// Copyright: Open CASCADE 2006
-
-
+//
#include "SMESH_MesherHelper.hxx"
-#include "SMDS_FacePosition.hxx"
#include "SMDS_EdgePosition.hxx"
-#include "SMESH_MeshEditor.hxx"
+#include "SMDS_FaceOfNodes.hxx"
+#include "SMDS_FacePosition.hxx"
+#include "SMDS_IteratorOnIterators.hxx"
+#include "SMDS_VolumeTool.hxx"
+#include "SMESH_Block.hxx"
+#include "SMESH_MeshAlgos.hxx"
+#include "SMESH_ProxyMesh.hxx"
+#include "SMESH_subMesh.hxx"
+#include <BRepAdaptor_Curve.hxx>
#include <BRepAdaptor_Surface.hxx>
#include <BRepTools.hxx>
#include <BRep_Tool.hxx>
#include <Geom2d_Curve.hxx>
+#include <GeomAPI_ProjectPointOnCurve.hxx>
+#include <GeomAPI_ProjectPointOnSurf.hxx>
#include <Geom_Curve.hxx>
+#include <Geom_RectangularTrimmedSurface.hxx>
#include <Geom_Surface.hxx>
+#include <ShapeAnalysis.hxx>
+#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
+#include <TopTools_ListIteratorOfListOfShape.hxx>
+#include <TopTools_MapIteratorOfMapOfShape.hxx>
#include <TopTools_MapOfShape.hxx>
+#include <TopoDS.hxx>
+#include <gp_Ax3.hxx>
#include <gp_Pnt2d.hxx>
-#include <ShapeAnalysis.hxx>
+#include <gp_Trsf.hxx>
+
+#include <Standard_Failure.hxx>
+#include <Standard_ErrorHandler.hxx>
+
+#include <utilities.h>
+
+#include <limits>
+
+using namespace std;
+
+#define RETURN_BAD_RESULT(msg) { MESSAGE(msg); return false; }
+
+namespace {
+
+ gp_XYZ XYZ(const SMDS_MeshNode* n) { return gp_XYZ(n->X(), n->Y(), n->Z()); }
+
+ enum { U_periodic = 1, V_periodic = 2 };
+}
+
+//================================================================================
+/*!
+ * \brief Constructor
+ */
+//================================================================================
+
+SMESH_MesherHelper::SMESH_MesherHelper(SMESH_Mesh& theMesh)
+ : myParIndex(0),
+ myMesh(&theMesh),
+ myShapeID(0),
+ myCreateQuadratic(false),
+ myCreateBiQuadratic(false),
+ myFixNodeParameters(false)
+{
+ myPar1[0] = myPar2[0] = myPar1[1] = myPar2[1] = 0;
+ mySetElemOnShape = ( ! myMesh->HasShapeToMesh() );
+}
//=======================================================================
-//function : CheckShape
+//function : ~SMESH_MesherHelper
//purpose :
//=======================================================================
+SMESH_MesherHelper::~SMESH_MesherHelper()
+{
+ {
+ TID2ProjectorOnSurf::iterator i_proj = myFace2Projector.begin();
+ for ( ; i_proj != myFace2Projector.end(); ++i_proj )
+ delete i_proj->second;
+ }
+ {
+ TID2ProjectorOnCurve::iterator i_proj = myEdge2Projector.begin();
+ for ( ; i_proj != myEdge2Projector.end(); ++i_proj )
+ delete i_proj->second;
+ }
+}
+
+//=======================================================================
+//function : IsQuadraticSubMesh
+//purpose : Check submesh for given shape: if all elements on this shape
+// are quadratic, quadratic elements will be created.
+// Also fill myTLinkNodeMap
+//=======================================================================
+
bool SMESH_MesherHelper::IsQuadraticSubMesh(const TopoDS_Shape& aSh)
{
- SMESHDS_Mesh* meshDS = GetMesh()->GetMeshDS();
+ SMESHDS_Mesh* meshDS = GetMeshDS();
// we can create quadratic elements only if all elements
- // created on subshapes of given shape are quadratic
- // also we have to fill myNLinkNodeMap
+ // created on sub-shapes of given shape are quadratic
+ // also we have to fill myTLinkNodeMap
myCreateQuadratic = true;
mySeamShapeIds.clear();
+ myDegenShapeIds.clear();
TopAbs_ShapeEnum subType( aSh.ShapeType()==TopAbs_FACE ? TopAbs_EDGE : TopAbs_FACE );
+ if ( aSh.ShapeType()==TopAbs_COMPOUND )
+ {
+ TopoDS_Iterator subIt( aSh );
+ if ( subIt.More() )
+ subType = ( subIt.Value().ShapeType()==TopAbs_FACE ) ? TopAbs_EDGE : TopAbs_FACE;
+ }
SMDSAbs_ElementType elemType( subType==TopAbs_FACE ? SMDSAbs_Face : SMDSAbs_Edge );
- TopExp_Explorer exp( aSh, subType );
- for (; exp.More() && myCreateQuadratic; exp.Next()) {
- if ( SMESHDS_SubMesh * subMesh = meshDS->MeshElements( exp.Current() )) {
- if ( SMDS_ElemIteratorPtr it = subMesh->GetElements() ) {
- while(it->more()) {
- const SMDS_MeshElement* e = it->next();
- if ( e->GetType() != elemType || !e->IsQuadratic() ) {
- myCreateQuadratic = false;
- break;
- }
- else {
- // fill NLinkNodeMap
- switch ( e->NbNodes() ) {
- case 3:
- AddNLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(2)); break;
- case 6:
- AddNLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(3));
- AddNLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(4));
- AddNLinkNode(e->GetNode(2),e->GetNode(0),e->GetNode(5)); break;
- case 8:
- AddNLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(4));
- AddNLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(5));
- AddNLinkNode(e->GetNode(2),e->GetNode(3),e->GetNode(6));
- AddNLinkNode(e->GetNode(3),e->GetNode(0),e->GetNode(7));
- break;
- default:
+
+ int nbOldLinks = myTLinkNodeMap.size();
+
+ if ( !myMesh->HasShapeToMesh() )
+ {
+ if (( myCreateQuadratic = myMesh->NbFaces( ORDER_QUADRATIC )))
+ {
+ SMDS_FaceIteratorPtr fIt = meshDS->facesIterator();
+ while ( fIt->more() )
+ AddTLinks( static_cast< const SMDS_MeshFace* >( fIt->next() ));
+ }
+ }
+ else
+ {
+ TopExp_Explorer exp( aSh, subType );
+ TopTools_MapOfShape checkedSubShapes;
+ for (; exp.More() && myCreateQuadratic; exp.Next()) {
+ if ( !checkedSubShapes.Add( exp.Current() ))
+ continue; // needed if aSh is compound of solids
+ if ( SMESHDS_SubMesh * subMesh = meshDS->MeshElements( exp.Current() )) {
+ if ( SMDS_ElemIteratorPtr it = subMesh->GetElements() ) {
+ while(it->more()) {
+ const SMDS_MeshElement* e = it->next();
+ if ( e->GetType() != elemType || !e->IsQuadratic() ) {
myCreateQuadratic = false;
break;
}
+ else {
+ // fill TLinkNodeMap
+ switch ( e->NbCornerNodes() ) {
+ case 2:
+ AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(2)); break;
+ case 3:
+ AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(3));
+ AddTLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(4));
+ AddTLinkNode(e->GetNode(2),e->GetNode(0),e->GetNode(5)); break;
+ case 4:
+ AddTLinkNode(e->GetNode(0),e->GetNode(1),e->GetNode(4));
+ AddTLinkNode(e->GetNode(1),e->GetNode(2),e->GetNode(5));
+ AddTLinkNode(e->GetNode(2),e->GetNode(3),e->GetNode(6));
+ AddTLinkNode(e->GetNode(3),e->GetNode(0),e->GetNode(7));
+ break;
+ default:
+ myCreateQuadratic = false;
+ break;
+ }
+ }
}
}
}
}
}
+ if ( nbOldLinks == myTLinkNodeMap.size() )
+ myCreateQuadratic = false;
+
if(!myCreateQuadratic) {
- myNLinkNodeMap.clear();
- }
- else {
- SetSubShape( aSh );
+ myTLinkNodeMap.clear();
}
+ SetSubShape( aSh );
+
return myCreateQuadratic;
}
-//================================================================================
-/*!
- * \brief Set geomerty to make elements on
- * \param aSh - geomertic shape
- */
-//================================================================================
+//=======================================================================
+//function : SetSubShape
+//purpose : Set geometry to make elements on
+//=======================================================================
void SMESH_MesherHelper::SetSubShape(const int aShID)
{
if ( aShID == myShapeID )
return;
- if ( aShID > 1 )
- SetSubShape( GetMesh()->GetMeshDS()->IndexToShape( aShID ));
+ if ( aShID > 0 )
+ SetSubShape( GetMeshDS()->IndexToShape( aShID ));
else
SetSubShape( TopoDS_Shape() );
}
-//================================================================================
-/*!
- * \brief Set geomerty to make elements on
- * \param aSh - geomertic shape
- */
-//================================================================================
+//=======================================================================
+//function : SetSubShape
+//purpose : Set geometry to create elements on
+//=======================================================================
void SMESH_MesherHelper::SetSubShape(const TopoDS_Shape& aSh)
{
- if ( !myShape.IsNull() && !aSh.IsNull() && myShape.IsSame( aSh ))
+ if ( myShape.IsSame( aSh ))
return;
myShape = aSh;
mySeamShapeIds.clear();
+ myDegenShapeIds.clear();
if ( myShape.IsNull() ) {
- myShapeID = -1;
+ myShapeID = 0;
return;
}
- SMESHDS_Mesh* meshDS = GetMesh()->GetMeshDS();
+ SMESHDS_Mesh* meshDS = GetMeshDS();
myShapeID = meshDS->ShapeToIndex(aSh);
+ myParIndex = 0;
// treatment of periodic faces
- if ( aSh.ShapeType() == TopAbs_FACE )
- {
- const TopoDS_Face& face = TopoDS::Face( aSh );
- BRepAdaptor_Surface surface( face );
- if ( surface.IsUPeriodic() || surface.IsVPeriodic() )
- {
- // look for a seam edge
- for ( TopExp_Explorer exp( face, TopAbs_EDGE ); exp.More(); exp.Next()) {
- const TopoDS_Edge& edge = TopoDS::Edge( exp.Current() );
- if ( BRep_Tool::IsClosed( edge, face )) {
- // initialize myPar1, myPar2 and myParIndex
- if ( mySeamShapeIds.empty() ) {
- gp_Pnt2d uv1, uv2;
+ for ( TopExp_Explorer eF( aSh, TopAbs_FACE ); eF.More(); eF.Next() )
+ {
+ const TopoDS_Face& face = TopoDS::Face( eF.Current() );
+ BRepAdaptor_Surface surf( face, false );
+ if ( surf.IsUPeriodic() || surf.IsUClosed() ) {
+ myParIndex |= U_periodic;
+ myPar1[0] = surf.FirstUParameter();
+ myPar2[0] = surf.LastUParameter();
+ }
+ if ( surf.IsVPeriodic() || surf.IsVClosed() ) {
+ myParIndex |= V_periodic;
+ myPar1[1] = surf.FirstVParameter();
+ myPar2[1] = surf.LastVParameter();
+ }
+
+ gp_Pnt2d uv1, uv2;
+ for (TopExp_Explorer exp( face, TopAbs_EDGE ); exp.More(); exp.Next())
+ {
+ // look for a "seam" edge, a real seam or an edge on period boundary
+ TopoDS_Edge edge = TopoDS::Edge( exp.Current() );
+ if ( myParIndex )
+ {
+ BRep_Tool::UVPoints( edge, face, uv1, uv2 );
+ const double du = Abs( uv1.Coord(1) - uv2.Coord(1) );
+ const double dv = Abs( uv1.Coord(2) - uv2.Coord(2) );
+
+ bool isSeam = BRep_Tool::IsClosed( edge, face );
+ if ( isSeam ) // real seam - having two pcurves on face
+ {
+ // pcurve can lie not on pediod boundary (22582, mesh_Quadratic_01/C9)
+ if ( du < dv )
+ {
+ double u1 = uv1.Coord(1);
+ edge.Reverse();
BRep_Tool::UVPoints( edge, face, uv1, uv2 );
- if ( Abs( uv1.Coord(1) - uv2.Coord(1) ) < Abs( uv1.Coord(2) - uv2.Coord(2) ))
- {
- myParIndex = 1; // U periodic
- myPar1 = surface.FirstUParameter();
- myPar2 = surface.LastUParameter();
- }
- else {
- myParIndex = 2; // V periodic
- myPar1 = surface.FirstVParameter();
- myPar2 = surface.LastVParameter();
- }
+ double u2 = uv1.Coord(1);
+ myPar1[0] = Min( u1, u2 );
+ myPar2[0] = Max( u1, u2 );
+ }
+ else
+ {
+ double v1 = uv1.Coord(2);
+ edge.Reverse();
+ BRep_Tool::UVPoints( edge, face, uv1, uv2 );
+ double v2 = uv1.Coord(2);
+ myPar1[1] = Min( v1, v2 );
+ myPar2[1] = Max( v1, v2 );
+ }
+ }
+ else //if ( !isSeam )
+ {
+ // one pcurve but on period boundary (22772, mesh_Quadratic_01/D1)
+ if (( myParIndex & U_periodic ) && du < Precision::PConfusion() )
+ {
+ isSeam = ( Abs( uv1.Coord(1) - myPar1[0] ) < Precision::PConfusion() ||
+ Abs( uv1.Coord(1) - myPar2[0] ) < Precision::PConfusion() );
+ }
+ else if (( myParIndex & V_periodic ) && dv < Precision::PConfusion() )
+ {
+ isSeam = ( Abs( uv1.Coord(2) - myPar1[1] ) < Precision::PConfusion() ||
+ Abs( uv1.Coord(2) - myPar2[1] ) < Precision::PConfusion() );
+ }
+ }
+ if ( isSeam )
+ {
+ // store seam shape indices, negative if shape encounters twice
+ int edgeID = meshDS->ShapeToIndex( edge );
+ mySeamShapeIds.insert( IsSeamShape( edgeID ) ? -edgeID : edgeID );
+ for ( TopExp_Explorer v( edge, TopAbs_VERTEX ); v.More(); v.Next() ) {
+ int vertexID = meshDS->ShapeToIndex( v.Current() );
+ mySeamShapeIds.insert( IsSeamShape( vertexID ) ? -vertexID : vertexID );
}
- // store shapes indices
- mySeamShapeIds.insert( meshDS->ShapeToIndex( exp.Current() ));
- for ( TopExp_Explorer v( exp.Current(), TopAbs_VERTEX ); v.More(); v.Next() )
- mySeamShapeIds.insert( meshDS->ShapeToIndex( v.Current() ));
}
}
+ // look for a degenerated edge
+ if ( SMESH_Algo::isDegenerated( edge )) {
+ myDegenShapeIds.insert( meshDS->ShapeToIndex( edge ));
+ for ( TopExp_Explorer v( edge, TopAbs_VERTEX ); v.More(); v.Next() )
+ myDegenShapeIds.insert( meshDS->ShapeToIndex( v.Current() ));
+ }
}
}
}
-//================================================================================
- /*!
- * \brief Check if inFaceNode argument is necessary for call GetNodeUV(F,..)
- * \param F - the face
- * \retval bool - return true if the face is periodic
- */
-//================================================================================
+//=======================================================================
+//function : GetNodeUVneedInFaceNode
+//purpose : Check if inFaceNode argument is necessary for call GetNodeUV(F,..)
+// Return true if the face is periodic.
+// If F is Null, answer about sub-shape set through IsQuadraticSubMesh() or
+// * SetSubShape()
+//=======================================================================
bool SMESH_MesherHelper::GetNodeUVneedInFaceNode(const TopoDS_Face& F) const
{
if ( !F.IsNull() && !myShape.IsNull() && myShape.IsSame( F ))
return !mySeamShapeIds.empty();
- Handle(Geom_Surface) aSurface = BRep_Tool::Surface( F );
+ TopLoc_Location loc;
+ Handle(Geom_Surface) aSurface = BRep_Tool::Surface( F,loc );
if ( !aSurface.IsNull() )
return ( aSurface->IsUPeriodic() || aSurface->IsVPeriodic() );
//=======================================================================
bool SMESH_MesherHelper::IsMedium(const SMDS_MeshNode* node,
- const SMDSAbs_ElementType typeToCheck)
+ const SMDSAbs_ElementType typeToCheck)
{
return SMESH_MeshEditor::IsMedium( node, typeToCheck );
}
//=======================================================================
-//function : AddNLinkNode
-//purpose :
+//function : GetSubShapeByNode
+//purpose : Return support shape of a node
+//=======================================================================
+
+TopoDS_Shape SMESH_MesherHelper::GetSubShapeByNode(const SMDS_MeshNode* node,
+ const SMESHDS_Mesh* meshDS)
+{
+ int shapeID = node ? node->getshapeId() : 0;
+ if ( 0 < shapeID && shapeID <= meshDS->MaxShapeIndex() )
+ return meshDS->IndexToShape( shapeID );
+ else
+ return TopoDS_Shape();
+}
+
+
+//=======================================================================
+//function : AddTLinkNode
+//purpose : add a link in my data structure
//=======================================================================
+
+void SMESH_MesherHelper::AddTLinkNode(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const SMDS_MeshNode* n12)
+{
+ // add new record to map
+ SMESH_TLink link( n1, n2 );
+ myTLinkNodeMap.insert( make_pair(link,n12));
+}
+
+//================================================================================
/*!
- * Auxilary function for filling myNLinkNodeMap
+ * \brief Add quadratic links of edge to own data structure
*/
-void SMESH_MesherHelper::AddNLinkNode(const SMDS_MeshNode* n1,
- const SMDS_MeshNode* n2,
- const SMDS_MeshNode* n12)
+//================================================================================
+
+bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshEdge* edge)
{
- NLink link( n1, n2 );
- if ( n1 > n2 ) link = NLink( n2, n1 );
- // add new record to map
- myNLinkNodeMap.insert( make_pair(link,n12));
+ if ( edge && edge->IsQuadratic() )
+ AddTLinkNode(edge->GetNode(0), edge->GetNode(1), edge->GetNode(2));
+ else
+ return false;
+ return true;
}
-//=======================================================================
+//================================================================================
+/*!
+ * \brief Add quadratic links of face to own data structure
+ */
+//================================================================================
+
+bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshFace* f)
+{
+ bool isQuad = true;
+ if ( !f->IsPoly() )
+ switch ( f->NbNodes() ) {
+ case 7:
+ // myMapWithCentralNode.insert
+ // ( make_pair( TBiQuad( f->GetNode(0),f->GetNode(1),f->GetNode(2) ),
+ // f->GetNode(6)));
+ // break; -- add medium nodes as well
+ case 6:
+ AddTLinkNode(f->GetNode(0),f->GetNode(1),f->GetNode(3));
+ AddTLinkNode(f->GetNode(1),f->GetNode(2),f->GetNode(4));
+ AddTLinkNode(f->GetNode(2),f->GetNode(0),f->GetNode(5)); break;
+
+ case 9:
+ // myMapWithCentralNode.insert
+ // ( make_pair( TBiQuad( f->GetNode(0),f->GetNode(1),f->GetNode(2),f->GetNode(3) ),
+ // f->GetNode(8)));
+ // break; -- add medium nodes as well
+ case 8:
+ AddTLinkNode(f->GetNode(0),f->GetNode(1),f->GetNode(4));
+ AddTLinkNode(f->GetNode(1),f->GetNode(2),f->GetNode(5));
+ AddTLinkNode(f->GetNode(2),f->GetNode(3),f->GetNode(6));
+ AddTLinkNode(f->GetNode(3),f->GetNode(0),f->GetNode(7)); break;
+ default:;
+ isQuad = false;
+ }
+ return isQuad;
+}
+
+//================================================================================
+/*!
+ * \brief Add quadratic links of volume to own data structure
+ */
+//================================================================================
+
+bool SMESH_MesherHelper::AddTLinks(const SMDS_MeshVolume* volume)
+{
+ if ( volume->IsQuadratic() )
+ {
+ SMDS_VolumeTool vTool( volume );
+ const SMDS_MeshNode** nodes = vTool.GetNodes();
+ set<int> addedLinks;
+ for ( int iF = 1; iF < vTool.NbFaces(); ++iF )
+ {
+ const int nbN = vTool.NbFaceNodes( iF );
+ const int* iNodes = vTool.GetFaceNodesIndices( iF );
+ for ( int i = 0; i < nbN; )
+ {
+ int iN1 = iNodes[i++];
+ int iN12 = iNodes[i++];
+ int iN2 = iNodes[i];
+ if ( iN1 > iN2 ) std::swap( iN1, iN2 );
+ int linkID = iN1 * vTool.NbNodes() + iN2;
+ pair< set<int>::iterator, bool > it_isNew = addedLinks.insert( linkID );
+ if ( it_isNew.second )
+ AddTLinkNode( nodes[iN1], nodes[iN2], nodes[iN12] );
+ else
+ addedLinks.erase( it_isNew.first ); // each link encounters only twice
+ }
+ if ( vTool.NbNodes() == 27 )
+ {
+ const SMDS_MeshNode* nFCenter = nodes[ vTool.GetCenterNodeIndex( iF )];
+ if ( nFCenter->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
+ myMapWithCentralNode.insert
+ ( make_pair( TBiQuad( nodes[ iNodes[0]], nodes[ iNodes[1]],
+ nodes[ iNodes[2]], nodes[ iNodes[3]] ),
+ nFCenter ));
+ }
+ }
+ return true;
+ }
+ return false;
+}
+
+//================================================================================
+/*!
+ * \brief Return true if position of nodes on the shape hasn't yet been checked or
+ * the positions proved to be invalid
+ */
+//================================================================================
+
+bool SMESH_MesherHelper::toCheckPosOnShape(int shapeID ) const
+{
+ map< int,bool >::const_iterator id_ok = myNodePosShapesValidity.find( shapeID );
+ return ( id_ok == myNodePosShapesValidity.end() || !id_ok->second );
+}
+
+//================================================================================
/*!
- * \brief Select UV on either of 2 pcurves of a seam edge, closest to the given UV
- * \param uv1 - UV on the seam
- * \param uv2 - UV within a face
- * \retval gp_Pnt2d - selected UV
+ * \brief Set validity of positions of nodes on the shape.
+ * Once set, validity is not changed
*/
+//================================================================================
+
+void SMESH_MesherHelper::setPosOnShapeValidity(int shapeID, bool ok ) const
+{
+ std::map< int,bool >::iterator sh_ok =
+ ((SMESH_MesherHelper*)this)->myNodePosShapesValidity.insert( make_pair( shapeID, ok)).first;
+ if ( !ok )
+ sh_ok->second = ok;
+}
+
+//=======================================================================
+//function : ToFixNodeParameters
+//purpose : Enables fixing node parameters on EDGEs and FACEs in
+// GetNodeU(...,check=true), GetNodeUV(...,check=true), CheckNodeUV() and
+// CheckNodeU() in case if a node lies on a shape set via SetSubShape().
+// Default is False
+//=======================================================================
+
+void SMESH_MesherHelper::ToFixNodeParameters(bool toFix)
+{
+ myFixNodeParameters = toFix;
+}
+
+
+//=======================================================================
+//function : GetUVOnSeam
+//purpose : Select UV on either of 2 pcurves of a seam edge, closest to the given UV
//=======================================================================
gp_Pnt2d SMESH_MesherHelper::GetUVOnSeam( const gp_Pnt2d& uv1, const gp_Pnt2d& uv2 ) const
{
- double p1 = uv1.Coord( myParIndex );
- double p2 = uv2.Coord( myParIndex );
- double p3 = ( Abs( p1 - myPar1 ) < Abs( p1 - myPar2 )) ? myPar2 : myPar1;
- if ( Abs( p2 - p1 ) > Abs( p2 - p3 ))
- p1 = p3;
gp_Pnt2d result = uv1;
- result.SetCoord( myParIndex, p1 );
+ for ( int i = U_periodic; i <= V_periodic ; ++i )
+ {
+ if ( myParIndex & i )
+ {
+ double p1 = uv1.Coord( i );
+ double dp1 = Abs( p1-myPar1[i-1]), dp2 = Abs( p1-myPar2[i-1]);
+ if ( myParIndex == i ||
+ dp1 < ( myPar2[i-1] - myPar1[i-1] ) / 100. ||
+ dp2 < ( myPar2[i-1] - myPar1[i-1] ) / 100. )
+ {
+ double p2 = uv2.Coord( i );
+ double p1Alt = ( dp1 < dp2 ) ? myPar2[i-1] : myPar1[i-1];
+ if ( Abs( p2 - p1 ) > Abs( p2 - p1Alt ))
+ result.SetCoord( i, p1Alt );
+ }
+ }
+ }
return result;
}
//=======================================================================
-/*!
- * \brief Return node UV on face
- * \param F - the face
- * \param n - the node
- * \param n2 - a node of element being created located inside a face
- * \retval gp_XY - resulting UV
- *
- * Auxilary function called form GetMediumNode()
- */
+//function : GetNodeUV
+//purpose : Return node UV on face
//=======================================================================
gp_XY SMESH_MesherHelper::GetNodeUV(const TopoDS_Face& F,
const SMDS_MeshNode* n,
- const SMDS_MeshNode* n2)
+ const SMDS_MeshNode* n2,
+ bool* check) const
{
- gp_Pnt2d uv;
+ gp_Pnt2d uv( Precision::Infinite(), Precision::Infinite() );
+
const SMDS_PositionPtr Pos = n->GetPosition();
- if(Pos->GetTypeOfPosition()==SMDS_TOP_FACE) {
+ bool uvOK = false;
+ if(Pos->GetTypeOfPosition()==SMDS_TOP_FACE)
+ {
// node has position on face
const SMDS_FacePosition* fpos =
- static_cast<const SMDS_FacePosition*>(n->GetPosition().get());
- uv = gp_Pnt2d(fpos->GetUParameter(),fpos->GetVParameter());
+ static_cast<const SMDS_FacePosition*>( Pos );
+ uv.SetCoord(fpos->GetUParameter(),fpos->GetVParameter());
+ if ( check )
+ uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 10*MaxTolerance( F ));
}
- else if(Pos->GetTypeOfPosition()==SMDS_TOP_EDGE) {
+ else if(Pos->GetTypeOfPosition()==SMDS_TOP_EDGE)
+ {
// node has position on edge => it is needed to find
// corresponding edge from face, get pcurve for this
- // edge and recieve value from this pcurve
+ // edge and retrieve value from this pcurve
const SMDS_EdgePosition* epos =
- static_cast<const SMDS_EdgePosition*>(n->GetPosition().get());
- SMESHDS_Mesh* meshDS = GetMesh()->GetMeshDS();
- int edgeID = Pos->GetShapeId();
- TopoDS_Edge E = TopoDS::Edge(meshDS->IndexToShape(edgeID));
- double f, l;
- TopLoc_Location loc;
+ static_cast<const SMDS_EdgePosition*>( Pos );
+ int edgeID = n->getshapeId();
+ TopoDS_Edge E = TopoDS::Edge(GetMeshDS()->IndexToShape(edgeID));
+ double f, l, u = epos->GetUParameter();
Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(E, F, f, l);
- uv = C2d->Value( epos->GetUParameter() );
+ bool validU = ( f < u && u < l );
+ if ( validU )
+ uv = C2d->Value( u );
+ else
+ uv.SetCoord( Precision::Infinite(),0.);
+ if ( check || !validU )
+ uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 10*MaxTolerance( F ),/*force=*/ !validU );
+
// for a node on a seam edge select one of UVs on 2 pcurves
- if ( n2 && mySeamShapeIds.find( edgeID ) != mySeamShapeIds.end() )
- uv = GetUVOnSeam( uv, GetNodeUV( F, n2, 0 ));
+ if ( n2 && IsSeamShape( edgeID ) )
+ {
+ uv = GetUVOnSeam( uv, GetNodeUV( F, n2, 0, check ));
+ }
+ else
+ { // adjust uv to period
+ TopLoc_Location loc;
+ Handle(Geom_Surface) S = BRep_Tool::Surface(F,loc);
+ Standard_Boolean isUPeriodic = S->IsUPeriodic();
+ Standard_Boolean isVPeriodic = S->IsVPeriodic();
+ gp_Pnt2d newUV = uv;
+ if ( isUPeriodic || isVPeriodic ) {
+ Standard_Real UF,UL,VF,VL;
+ S->Bounds(UF,UL,VF,VL);
+ if ( isUPeriodic )
+ newUV.SetX( uv.X() + ShapeAnalysis::AdjustToPeriod(uv.X(),UF,UL));
+ if ( isVPeriodic )
+ newUV.SetY( uv.Y() + ShapeAnalysis::AdjustToPeriod(uv.Y(),VF,VL));
+ }
+ if ( n2 )
+ {
+ gp_Pnt2d uv2 = GetNodeUV( F, n2, 0, check );
+ if ( isUPeriodic && Abs( uv.X()-uv2.X() ) < Abs( newUV.X()-uv2.X() ))
+ newUV.SetX( uv.X() );
+ if ( isVPeriodic && Abs( uv.Y()-uv2.Y() ) < Abs( newUV.Y()-uv2.Y() ))
+ newUV.SetY( uv.Y() );
+ }
+ uv = newUV;
+ }
+ }
+ else if(Pos->GetTypeOfPosition()==SMDS_TOP_VERTEX)
+ {
+ if ( int vertexID = n->getshapeId() ) {
+ const TopoDS_Vertex& V = TopoDS::Vertex(GetMeshDS()->IndexToShape(vertexID));
+ try {
+ uv = BRep_Tool::Parameters( V, F );
+ uvOK = true;
+ }
+ catch (Standard_Failure& exc) {
+ }
+ if ( !uvOK ) {
+ for ( TopExp_Explorer vert(F,TopAbs_VERTEX); !uvOK && vert.More(); vert.Next() )
+ uvOK = ( V == vert.Current() );
+ if ( !uvOK ) {
+ MESSAGE ( "SMESH_MesherHelper::GetNodeUV(); Vertex " << vertexID
+ << " not in face " << GetMeshDS()->ShapeToIndex( F ) );
+ // get UV of a vertex closest to the node
+ double dist = 1e100;
+ gp_Pnt pn = XYZ( n );
+ for ( TopExp_Explorer vert(F,TopAbs_VERTEX); !uvOK && vert.More(); vert.Next() ) {
+ TopoDS_Vertex curV = TopoDS::Vertex( vert.Current() );
+ gp_Pnt p = BRep_Tool::Pnt( curV );
+ double curDist = p.SquareDistance( pn );
+ if ( curDist < dist ) {
+ dist = curDist;
+ uv = BRep_Tool::Parameters( curV, F );
+ uvOK = ( dist < DBL_MIN );
+ }
+ }
+ }
+ else {
+ uvOK = false;
+ TopTools_ListIteratorOfListOfShape it( myMesh->GetAncestors( V ));
+ for ( ; it.More(); it.Next() ) {
+ if ( it.Value().ShapeType() == TopAbs_EDGE ) {
+ const TopoDS_Edge & edge = TopoDS::Edge( it.Value() );
+ double f,l;
+ Handle(Geom2d_Curve) C2d = BRep_Tool::CurveOnSurface(edge, F, f, l);
+ if ( !C2d.IsNull() ) {
+ double u = ( V == TopExp::FirstVertex( edge ) ) ? f : l;
+ uv = C2d->Value( u );
+ uvOK = true;
+ break;
+ }
+ }
+ }
+ }
+ }
+ if ( n2 && IsSeamShape( vertexID ) )
+ uv = GetUVOnSeam( uv, GetNodeUV( F, n2, 0 ));
+ }
}
- else if(Pos->GetTypeOfPosition()==SMDS_TOP_VERTEX) {
- SMESHDS_Mesh * meshDS = GetMesh()->GetMeshDS();
- int vertexID = n->GetPosition()->GetShapeId();
- const TopoDS_Vertex& V = TopoDS::Vertex(meshDS->IndexToShape(vertexID));
- uv = BRep_Tool::Parameters( V, F );
- if ( n2 && mySeamShapeIds.find( vertexID ) != mySeamShapeIds.end() )
- uv = GetUVOnSeam( uv, GetNodeUV( F, n2, 0 ));
+ else
+ {
+ uvOK = CheckNodeUV( F, n, uv.ChangeCoord(), 10*MaxTolerance( F ));
}
+
+ if ( check )
+ *check = uvOK;
+
return uv.XY();
}
//=======================================================================
-/*!
- * \brief Return node U on edge
- * \param E - the Edge
- * \param n - the node
- * \retval double - resulting U
- *
- * Auxilary function called form GetMediumNode()
- */
+//function : CheckNodeUV
+//purpose : Check and fix node UV on a face
//=======================================================================
-double SMESH_MesherHelper::GetNodeU(const TopoDS_Edge& E,
- const SMDS_MeshNode* n)
+bool SMESH_MesherHelper::CheckNodeUV(const TopoDS_Face& F,
+ const SMDS_MeshNode* n,
+ gp_XY& uv,
+ const double tol,
+ const bool force,
+ double distXYZ[4]) const
{
- double param = 0;
- const SMDS_PositionPtr Pos = n->GetPosition();
- if(Pos->GetTypeOfPosition()==SMDS_TOP_EDGE) {
- const SMDS_EdgePosition* epos =
- static_cast<const SMDS_EdgePosition*>(n->GetPosition().get());
- param = epos->GetUParameter();
+ int shapeID = n->getshapeId();
+ bool infinit = ( Precision::IsInfinite( uv.X() ) || Precision::IsInfinite( uv.Y() ));
+ bool zero = ( uv.X() == 0. && uv.Y() == 0. );
+ if ( force || toCheckPosOnShape( shapeID ) || infinit || zero )
+ {
+ // check that uv is correct
+ TopLoc_Location loc;
+ Handle(Geom_Surface) surface = BRep_Tool::Surface( F,loc );
+ gp_Pnt nodePnt = XYZ( n ), surfPnt(0,0,0);
+ double dist = 0;
+ if ( !loc.IsIdentity() ) nodePnt.Transform( loc.Transformation().Inverted() );
+ if ( infinit ||
+ (dist = nodePnt.Distance( surfPnt = surface->Value( uv.X(), uv.Y() ))) > tol )
+ {
+ setPosOnShapeValidity( shapeID, false );
+ if ( !infinit && distXYZ ) {
+ surfPnt.Transform( loc );
+ distXYZ[0] = dist;
+ distXYZ[1] = surfPnt.X(); distXYZ[2] = surfPnt.Y(); distXYZ[3]=surfPnt.Z();
+ }
+ // uv incorrect, project the node to surface
+ GeomAPI_ProjectPointOnSurf& projector = GetProjector( F, loc, tol );
+ projector.Perform( nodePnt );
+ if ( !projector.IsDone() || projector.NbPoints() < 1 )
+ {
+ MESSAGE( "SMESH_MesherHelper::CheckNodeUV() failed to project" );
+ return false;
+ }
+ Quantity_Parameter U,V;
+ projector.LowerDistanceParameters(U,V);
+ uv.SetCoord( U,V );
+ surfPnt = surface->Value( U, V );
+ dist = nodePnt.Distance( surfPnt );
+ if ( distXYZ ) {
+ surfPnt.Transform( loc );
+ distXYZ[0] = dist;
+ distXYZ[1] = surfPnt.X(); distXYZ[2] = surfPnt.Y(); distXYZ[3]=surfPnt.Z();
+ }
+ if ( dist > tol )
+ {
+ MESSAGE( "SMESH_MesherHelper::CheckNodeUV(), invalid projection" );
+ return false;
+ }
+ // store the fixed UV on the face
+ if ( myShape.IsSame(F) && shapeID == myShapeID && myFixNodeParameters )
+ const_cast<SMDS_MeshNode*>(n)->SetPosition
+ ( SMDS_PositionPtr( new SMDS_FacePosition( U, V )));
+ }
+ else if ( uv.Modulus() > numeric_limits<double>::min() )
+ {
+ setPosOnShapeValidity( shapeID, true );
+ }
}
- else if(Pos->GetTypeOfPosition()==SMDS_TOP_VERTEX) {
- SMESHDS_Mesh * meshDS = GetMesh()->GetMeshDS();
- int vertexID = n->GetPosition()->GetShapeId();
- const TopoDS_Vertex& V = TopoDS::Vertex(meshDS->IndexToShape(vertexID));
- param = BRep_Tool::Parameter( V, E );
+ return true;
+}
+
+//=======================================================================
+//function : GetProjector
+//purpose : Return projector intitialized by given face without location, which is returned
+//=======================================================================
+
+GeomAPI_ProjectPointOnSurf& SMESH_MesherHelper::GetProjector(const TopoDS_Face& F,
+ TopLoc_Location& loc,
+ double tol ) const
+{
+ Handle(Geom_Surface) surface = BRep_Tool::Surface( F,loc );
+ int faceID = GetMeshDS()->ShapeToIndex( F );
+ TID2ProjectorOnSurf& i2proj = const_cast< TID2ProjectorOnSurf&>( myFace2Projector );
+ TID2ProjectorOnSurf::iterator i_proj = i2proj.find( faceID );
+ if ( i_proj == i2proj.end() )
+ {
+ if ( tol == 0 ) tol = BRep_Tool::Tolerance( F );
+ double U1, U2, V1, V2;
+ surface->Bounds(U1, U2, V1, V2);
+ GeomAPI_ProjectPointOnSurf* proj = new GeomAPI_ProjectPointOnSurf();
+ proj->Init( surface, U1, U2, V1, V2, tol );
+ i_proj = i2proj.insert( make_pair( faceID, proj )).first;
}
- return param;
+ return *( i_proj->second );
+}
+
+namespace
+{
+ gp_XY AverageUV(const gp_XY& uv1, const gp_XY& uv2) { return ( uv1 + uv2 ) / 2.; }
+ gp_XY_FunPtr(Added); // define gp_XY_Added pointer to function calling gp_XY::Added(gp_XY)
+ gp_XY_FunPtr(Subtracted);
}
//=======================================================================
-//function : GetMediumNode
-//purpose :
+//function : applyIn2D
+//purpose : Perform given operation on two 2d points in parameric space of given surface.
+// It takes into account period of the surface. Use gp_XY_FunPtr macro
+// to easily define pointer to function of gp_XY class.
//=======================================================================
-/*!
- * Special function for search or creation medium node
- */
-const SMDS_MeshNode* SMESH_MesherHelper::GetMediumNode(const SMDS_MeshNode* n1,
- const SMDS_MeshNode* n2,
- bool force3d)
+
+gp_XY SMESH_MesherHelper::applyIn2D(const Handle(Geom_Surface)& surface,
+ const gp_XY& uv1,
+ const gp_XY& uv2,
+ xyFunPtr fun,
+ const bool resultInPeriod)
{
- TopAbs_ShapeEnum shapeType = myShape.IsNull() ? TopAbs_SHAPE : myShape.ShapeType();
+ Standard_Boolean isUPeriodic = surface.IsNull() ? false : surface->IsUPeriodic();
+ Standard_Boolean isVPeriodic = surface.IsNull() ? false : surface->IsVPeriodic();
+ if ( !isUPeriodic && !isVPeriodic )
+ return fun(uv1,uv2);
- NLink link(( n1 < n2 ? n1 : n2 ), ( n1 < n2 ? n2 : n1 ));
- ItNLinkNode itLN = myNLinkNodeMap.find( link );
- if ( itLN != myNLinkNodeMap.end() ) {
- return (*itLN).second;
- }
- else {
- // create medium node
- SMDS_MeshNode* n12;
- SMESHDS_Mesh* meshDS = GetMesh()->GetMeshDS();
- int faceID = -1, edgeID = -1;
- const SMDS_PositionPtr Pos1 = n1->GetPosition();
- const SMDS_PositionPtr Pos2 = n2->GetPosition();
-
- if( myShape.IsNull() )
- {
- if( Pos1->GetTypeOfPosition()==SMDS_TOP_FACE ) {
- faceID = Pos1->GetShapeId();
- }
- else if( Pos2->GetTypeOfPosition()==SMDS_TOP_FACE ) {
- faceID = Pos2->GetShapeId();
- }
-
- if( Pos1->GetTypeOfPosition()==SMDS_TOP_EDGE ) {
- edgeID = Pos1->GetShapeId();
- }
- if( Pos2->GetTypeOfPosition()==SMDS_TOP_EDGE ) {
- edgeID = Pos2->GetShapeId();
- }
- }
-
- if(!force3d) {
- // we try to create medium node using UV parameters of
- // nodes, else - medium between corresponding 3d points
- if(faceID>-1 || shapeType == TopAbs_FACE) {
- // obtaining a face and 2d points for nodes
- TopoDS_Face F;
- if( myShape.IsNull() )
- F = TopoDS::Face(meshDS->IndexToShape(faceID));
- else {
- F = TopoDS::Face(myShape);
- faceID = myShapeID;
- }
-
- gp_XY p1 = GetNodeUV(F,n1,n2);
- gp_XY p2 = GetNodeUV(F,n2,n1);
-
- //checking if surface is periodic
- Handle(Geom_Surface) S = BRep_Tool::Surface(F);
- Standard_Real UF,UL,VF,VL;
- S->Bounds(UF,UL,VF,VL);
-
- Standard_Real u,v;
- Standard_Boolean isUPeriodic = S->IsUPeriodic();
- if(isUPeriodic) {
- Standard_Real UPeriod = S->UPeriod();
- Standard_Real p2x = p2.X()+ShapeAnalysis::AdjustByPeriod(p2.X(),p1.X(),UPeriod);
- Standard_Real pmid = (p1.X()+p2x)/2.;
- u = pmid+ShapeAnalysis::AdjustToPeriod(pmid,UF,UL);
- }
- else
- u= (p1.X()+p2.X())/2.;
-
- Standard_Boolean isVPeriodic = S->IsVPeriodic();
- if(isVPeriodic) {
- Standard_Real VPeriod = S->VPeriod();
- Standard_Real p2y = p2.Y()+ShapeAnalysis::AdjustByPeriod(p2.Y(),p1.Y(),VPeriod);
- Standard_Real pmid = (p1.Y()+p2y)/2.;
- v = pmid+ShapeAnalysis::AdjustToPeriod(pmid,VF,VL);
- }
- else
- v = (p1.Y()+p2.Y())/2.;
-
- gp_Pnt P = S->Value(u, v);
- n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
- meshDS->SetNodeOnFace(n12, faceID, u, v);
- myNLinkNodeMap.insert(NLinkNodeMap::value_type(link,n12));
- return n12;
- }
- if (edgeID>-1 || shapeType == TopAbs_EDGE) {
-
- TopoDS_Edge E;
- if( myShape.IsNull() )
- E = TopoDS::Edge(meshDS->IndexToShape(edgeID));
- else {
- E = TopoDS::Edge(myShape);
- edgeID = myShapeID;
- }
-
- double p1 = GetNodeU(E,n1);
- double p2 = GetNodeU(E,n2);
-
- double f,l;
- Handle(Geom_Curve) C = BRep_Tool::Curve(E, f, l);
- if(!C.IsNull()) {
-
- Standard_Boolean isPeriodic = C->IsPeriodic();
- double u;
- if(isPeriodic) {
- Standard_Real Period = C->Period();
- Standard_Real p = p2+ShapeAnalysis::AdjustByPeriod(p2,p1,Period);
- Standard_Real pmid = (p1+p)/2.;
- u = pmid+ShapeAnalysis::AdjustToPeriod(pmid,C->FirstParameter(),C->LastParameter());
- }
- else
- u = (p1+p2)/2.;
-
- gp_Pnt P = C->Value( u );
- n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
- meshDS->SetNodeOnEdge(n12, edgeID, u);
- myNLinkNodeMap.insert(NLinkNodeMap::value_type(link,n12));
- return n12;
- }
- }
- }
- // 3d variant
- double x = ( n1->X() + n2->X() )/2.;
- double y = ( n1->Y() + n2->Y() )/2.;
- double z = ( n1->Z() + n2->Z() )/2.;
- n12 = meshDS->AddNode(x,y,z);
- if(edgeID>-1)
- meshDS->SetNodeOnEdge(n12, edgeID);
- else if(faceID>-1)
- meshDS->SetNodeOnFace(n12, faceID);
- else
- meshDS->SetNodeInVolume(n12, myShapeID);
- myNLinkNodeMap.insert(NLinkNodeMap::value_type(link,n12));
- return n12;
+ // move uv2 not far than half-period from uv1
+ double u2 =
+ uv2.X()+(isUPeriodic ? ShapeAnalysis::AdjustByPeriod(uv2.X(),uv1.X(),surface->UPeriod()) :0);
+ double v2 =
+ uv2.Y()+(isVPeriodic ? ShapeAnalysis::AdjustByPeriod(uv2.Y(),uv1.Y(),surface->VPeriod()) :0);
+
+ // execute operation
+ gp_XY res = fun( uv1, gp_XY(u2,v2) );
+
+ // move result within period
+ if ( resultInPeriod )
+ {
+ Standard_Real UF,UL,VF,VL;
+ surface->Bounds(UF,UL,VF,VL);
+ if ( isUPeriodic )
+ res.SetX( res.X() + ShapeAnalysis::AdjustToPeriod(res.X(),UF,UL));
+ if ( isVPeriodic )
+ res.SetY( res.Y() + ShapeAnalysis::AdjustToPeriod(res.Y(),VF,VL));
}
-}
+ return res;
+}
//=======================================================================
-//function : AddQuadraticEdge
-//purpose :
+//function : GetMiddleUV
+//purpose : Return middle UV taking in account surface period
//=======================================================================
-/**
- * Special function for creation quadratic edge
- */
-SMDS_QuadraticEdge* SMESH_MesherHelper::AddQuadraticEdge(const SMDS_MeshNode* n1,
- const SMDS_MeshNode* n2,
- const int id,
- const bool force3d)
+
+gp_XY SMESH_MesherHelper::GetMiddleUV(const Handle(Geom_Surface)& surface,
+ const gp_XY& p1,
+ const gp_XY& p2)
{
- SMESHDS_Mesh * meshDS = GetMesh()->GetMeshDS();
-
- const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
-
- myCreateQuadratic = true;
+ // NOTE:
+ // the proper place of getting basic surface seems to be in applyIn2D()
+ // but we put it here to decrease a risk of regressions just before releasing a version
+ Handle(Geom_Surface) surf = surface;
+ while ( !surf.IsNull() && surf->IsKind(STANDARD_TYPE(Geom_RectangularTrimmedSurface )))
+ surf = Handle(Geom_RectangularTrimmedSurface)::DownCast( surf )->BasisSurface();
- if(id)
- return (SMDS_QuadraticEdge*)(meshDS->AddEdgeWithID(n1, n2, n12, id));
- else
- return (SMDS_QuadraticEdge*)(meshDS->AddEdge(n1, n2, n12));
+ return applyIn2D( surf, p1, p2, & AverageUV );
}
//=======================================================================
-//function : AddFace
-//purpose :
+//function : GetCenterUV
+//purpose : Return UV for the central node of a biquadratic triangle
//=======================================================================
-/*!
- * Special function for creation quadratic triangle
- */
-SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
- const SMDS_MeshNode* n2,
- const SMDS_MeshNode* n3,
- const int id,
- const bool force3d)
+
+gp_XY SMESH_MesherHelper::GetCenterUV(const gp_XY& uv1,
+ const gp_XY& uv2,
+ const gp_XY& uv3,
+ const gp_XY& uv12,
+ const gp_XY& uv23,
+ const gp_XY& uv31,
+ bool * isBadTria/*=0*/)
{
- SMESHDS_Mesh * meshDS = GetMesh()->GetMeshDS();
- if(!myCreateQuadratic) {
- if(id)
- return meshDS->AddFaceWithID(n1, n2, n3, id);
- else
- return meshDS->AddFace(n1, n2, n3);
- }
+ bool badTria;
+ gp_XY uvAvg = ( uv12 + uv23 + uv31 ) / 3.;
- const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
- const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
- const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,force3d);
+ if (( badTria = (( uvAvg - uv1 ) * ( uvAvg - uv23 ) > 0 )))
+ uvAvg = ( uv1 + uv23 ) / 2.;
+ else if (( badTria = (( uvAvg - uv2 ) * ( uvAvg - uv31 ) > 0 )))
+ uvAvg = ( uv2 + uv31 ) / 2.;
+ else if (( badTria = (( uvAvg - uv3 ) * ( uvAvg - uv12 ) > 0 )))
+ uvAvg = ( uv3 + uv12 ) / 2.;
- if(id)
- return meshDS->AddFaceWithID(n1, n2, n3, n12, n23, n31, id);
- else
- return meshDS->AddFace(n1, n2, n3, n12, n23, n31);
+ if ( isBadTria )
+ *isBadTria = badTria;
+ return uvAvg;
}
-
//=======================================================================
-//function : AddFace
-//purpose :
+//function : GetNodeU
+//purpose : Return node U on edge
//=======================================================================
-/*!
- * Special function for creation quadratic quadrangle
- */
-SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
- const SMDS_MeshNode* n2,
- const SMDS_MeshNode* n3,
- const SMDS_MeshNode* n4,
- const int id,
- const bool force3d)
+
+double SMESH_MesherHelper::GetNodeU(const TopoDS_Edge& E,
+ const SMDS_MeshNode* n,
+ const SMDS_MeshNode* inEdgeNode,
+ bool* check) const
{
- SMESHDS_Mesh * meshDS = GetMesh()->GetMeshDS();
- if(!myCreateQuadratic) {
- if(id)
- return meshDS->AddFaceWithID(n1, n2, n3, n4, id);
+ double param = Precision::Infinite();
+
+ const SMDS_PositionPtr pos = n->GetPosition();
+ if ( pos->GetTypeOfPosition()==SMDS_TOP_EDGE )
+ {
+ const SMDS_EdgePosition* epos = static_cast<const SMDS_EdgePosition*>( pos );
+ param = epos->GetUParameter();
+ }
+ else if( pos->GetTypeOfPosition() == SMDS_TOP_VERTEX )
+ {
+ if ( inEdgeNode && TopExp::FirstVertex( E ).IsSame( TopExp::LastVertex( E ))) // issue 0020128
+ {
+ Standard_Real f,l;
+ BRep_Tool::Range( E, f,l );
+ double uInEdge = GetNodeU( E, inEdgeNode );
+ param = ( fabs( uInEdge - f ) < fabs( l - uInEdge )) ? f : l;
+ }
else
- return meshDS->AddFace(n1, n2, n3, n4);
+ {
+ SMESHDS_Mesh * meshDS = GetMeshDS();
+ int vertexID = n->getshapeId();
+ const TopoDS_Vertex& V = TopoDS::Vertex(meshDS->IndexToShape(vertexID));
+ param = BRep_Tool::Parameter( V, E );
+ }
}
+ if ( check )
+ {
+ double tol = BRep_Tool::Tolerance( E );
+ double f,l; BRep_Tool::Range( E, f,l );
+ bool force = ( param < f-tol || param > l+tol );
+ if ( !force && pos->GetTypeOfPosition()==SMDS_TOP_EDGE )
+ force = ( GetMeshDS()->ShapeToIndex( E ) != n->getshapeId() );
- const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
- const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
- const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
- const SMDS_MeshNode* n41 = GetMediumNode(n4,n1,force3d);
-
- if(id)
- return meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, id);
- else
- return meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41);
+ *check = CheckNodeU( E, n, param, 2*tol, force );
+ }
+ return param;
}
-
//=======================================================================
-//function : AddVolume
-//purpose :
+//function : CheckNodeU
+//purpose : Check and fix node U on an edge
+// Return false if U is bad and could not be fixed
//=======================================================================
-/*!
- * Special function for creation quadratic volume
- */
-SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
- const SMDS_MeshNode* n2,
- const SMDS_MeshNode* n3,
- const SMDS_MeshNode* n4,
- const SMDS_MeshNode* n5,
- const SMDS_MeshNode* n6,
- const int id,
- const bool force3d)
+
+bool SMESH_MesherHelper::CheckNodeU(const TopoDS_Edge& E,
+ const SMDS_MeshNode* n,
+ double& u,
+ const double tol,
+ const bool force,
+ double distXYZ[4]) const
{
- SMESHDS_Mesh * meshDS = GetMesh()->GetMeshDS();
- if(!myCreateQuadratic) {
- if(id)
- return meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, id);
+ int shapeID = n->getshapeId();
+ bool infinit = Precision::IsInfinite( u );
+ bool zero = ( u == 0. );
+ if ( force || infinit || zero || toCheckPosOnShape( shapeID ))
+ {
+ TopLoc_Location loc; double f,l;
+ Handle(Geom_Curve) curve = BRep_Tool::Curve( E,loc,f,l );
+ if ( curve.IsNull() ) // degenerated edge
+ {
+ if ( u+tol < f || u-tol > l )
+ {
+ double r = Max( 0.5, 1 - tol*n->GetID()); // to get a unique u on edge
+ u = f*r + l*(1-r);
+ }
+ }
else
- return meshDS->AddVolume(n1, n2, n3, n4, n5, n6);
+ {
+ gp_Pnt nodePnt = SMESH_TNodeXYZ( n );
+ if ( !loc.IsIdentity() ) nodePnt.Transform( loc.Transformation().Inverted() );
+ gp_Pnt curvPnt;
+ double dist = 2*tol;
+ if ( !infinit )
+ {
+ curvPnt = curve->Value( u );
+ dist = nodePnt.Distance( curvPnt );
+ if ( distXYZ ) {
+ curvPnt.Transform( loc );
+ distXYZ[0] = dist;
+ distXYZ[1] = curvPnt.X(); distXYZ[2] = curvPnt.Y(); distXYZ[3]=curvPnt.Z();
+ }
+ }
+ if ( dist > tol )
+ {
+ setPosOnShapeValidity( shapeID, false );
+ // u incorrect, project the node to the curve
+ int edgeID = GetMeshDS()->ShapeToIndex( E );
+ TID2ProjectorOnCurve& i2proj = const_cast< TID2ProjectorOnCurve&>( myEdge2Projector );
+ TID2ProjectorOnCurve::iterator i_proj =
+ i2proj.insert( make_pair( edgeID, (GeomAPI_ProjectPointOnCurve*) 0 )).first;
+ if ( !i_proj->second )
+ {
+ i_proj->second = new GeomAPI_ProjectPointOnCurve();
+ i_proj->second->Init( curve, f, l );
+ }
+ GeomAPI_ProjectPointOnCurve* projector = i_proj->second;
+ projector->Perform( nodePnt );
+ if ( projector->NbPoints() < 1 )
+ {
+ MESSAGE( "SMESH_MesherHelper::CheckNodeU() failed to project" );
+ return false;
+ }
+ Quantity_Parameter U = projector->LowerDistanceParameter();
+ u = double( U );
+ MESSAGE(" f " << f << " l " << l << " u " << u);
+ curvPnt = curve->Value( u );
+ dist = nodePnt.Distance( curvPnt );
+ if ( distXYZ ) {
+ curvPnt.Transform( loc );
+ distXYZ[0] = dist;
+ distXYZ[1] = curvPnt.X(); distXYZ[2] = curvPnt.Y(); distXYZ[3]=curvPnt.Z();
+ }
+ if ( dist > tol )
+ {
+ MESSAGE( "SMESH_MesherHelper::CheckNodeU(), invalid projection" );
+ MESSAGE("distance " << dist << " " << tol );
+ return false;
+ }
+ // store the fixed U on the edge
+ if ( myShape.IsSame(E) && shapeID == myShapeID && myFixNodeParameters )
+ const_cast<SMDS_MeshNode*>(n)->SetPosition
+ ( SMDS_PositionPtr( new SMDS_EdgePosition( U )));
+ }
+ else if ( fabs( u ) > numeric_limits<double>::min() )
+ {
+ setPosOnShapeValidity( shapeID, true );
+ }
+ if (( u < f-tol || u > l+tol ) && force )
+ {
+ MESSAGE("u < f-tol || u > l+tol ; u " << u << " f " << f << " l " << l);
+ // node is on vertex but is set on periodic but trimmed edge (issue 0020890)
+ try
+ {
+ // do not use IsPeriodic() as Geom_TrimmedCurve::IsPeriodic () returns false
+ double period = curve->Period();
+ u = ( u < f ) ? u + period : u - period;
+ }
+ catch (Standard_Failure& exc)
+ {
+ return false;
+ }
+ }
+ }
}
+ return true;
+}
- const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
- const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
- const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,force3d);
+//=======================================================================
+//function : GetMediumPos
+//purpose : Return index and type of the shape (EDGE or FACE only) to
+// set a medium node on
+//param : useCurSubShape - if true, returns the shape set via SetSubShape()
+// if any
+//=======================================================================
- const SMDS_MeshNode* n45 = GetMediumNode(n4,n5,force3d);
- const SMDS_MeshNode* n56 = GetMediumNode(n5,n6,force3d);
- const SMDS_MeshNode* n64 = GetMediumNode(n6,n4,force3d);
+std::pair<int, TopAbs_ShapeEnum>
+SMESH_MesherHelper::GetMediumPos(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const bool useCurSubShape)
+{
+ if ( useCurSubShape && !myShape.IsNull() )
+ return std::make_pair( myShapeID, myShape.ShapeType() );
- const SMDS_MeshNode* n14 = GetMediumNode(n1,n4,force3d);
- const SMDS_MeshNode* n25 = GetMediumNode(n2,n5,force3d);
- const SMDS_MeshNode* n36 = GetMediumNode(n3,n6,force3d);
+ TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
+ int shapeID = -1;
+ TopoDS_Shape shape;
- if(id)
- return meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6,
- n12, n23, n31, n45, n56, n64, n14, n25, n36, id);
+ if (( myShapeID == n1->getshapeId() || myShapeID == n2->getshapeId() ) && myShapeID > 0 )
+ {
+ shapeType = myShape.ShapeType();
+ shapeID = myShapeID;
+ }
+ else if ( n1->getshapeId() == n2->getshapeId() )
+ {
+ shapeID = n2->getshapeId();
+ shape = GetSubShapeByNode( n1, GetMeshDS() );
+ }
else
- return meshDS->AddVolume(n1, n2, n3, n4, n5, n6,
- n12, n23, n31, n45, n56, n64, n14, n25, n36);
-}
+ {
+ const SMDS_TypeOfPosition Pos1 = n1->GetPosition()->GetTypeOfPosition();
+ const SMDS_TypeOfPosition Pos2 = n2->GetPosition()->GetTypeOfPosition();
+
+ if ( Pos1 == SMDS_TOP_3DSPACE || Pos2 == SMDS_TOP_3DSPACE )
+ {
+ }
+ else if ( Pos1 == SMDS_TOP_FACE || Pos2 == SMDS_TOP_FACE )
+ {
+ if ( Pos1 != SMDS_TOP_FACE || Pos2 != SMDS_TOP_FACE )
+ {
+ if ( Pos1 != SMDS_TOP_FACE ) std::swap( n1,n2 );
+ TopoDS_Shape F = GetSubShapeByNode( n1, GetMeshDS() );
+ TopoDS_Shape S = GetSubShapeByNode( n2, GetMeshDS() );
+ if ( IsSubShape( S, F ))
+ {
+ shapeType = TopAbs_FACE;
+ shapeID = n1->getshapeId();
+ }
+ }
+ }
+ else if ( Pos1 == SMDS_TOP_EDGE && Pos2 == SMDS_TOP_EDGE )
+ {
+ TopoDS_Shape E1 = GetSubShapeByNode( n1, GetMeshDS() );
+ TopoDS_Shape E2 = GetSubShapeByNode( n2, GetMeshDS() );
+ shape = GetCommonAncestor( E1, E2, *myMesh, TopAbs_FACE );
+ }
+ else if ( Pos1 == SMDS_TOP_VERTEX && Pos2 == SMDS_TOP_VERTEX )
+ {
+ TopoDS_Shape V1 = GetSubShapeByNode( n1, GetMeshDS() );
+ TopoDS_Shape V2 = GetSubShapeByNode( n2, GetMeshDS() );
+ shape = GetCommonAncestor( V1, V2, *myMesh, TopAbs_EDGE );
+ if ( shape.IsNull() ) shape = GetCommonAncestor( V1, V2, *myMesh, TopAbs_FACE );
+ }
+ else // VERTEX and EDGE
+ {
+ if ( Pos1 != SMDS_TOP_VERTEX ) std::swap( n1,n2 );
+ TopoDS_Shape V = GetSubShapeByNode( n1, GetMeshDS() );
+ TopoDS_Shape E = GetSubShapeByNode( n2, GetMeshDS() );
+ if ( IsSubShape( V, E ))
+ shape = E;
+ else
+ shape = GetCommonAncestor( V, E, *myMesh, TopAbs_FACE );
+ }
+ }
+ if ( !shape.IsNull() )
+ {
+ if ( shapeID < 1 )
+ shapeID = GetMeshDS()->ShapeToIndex( shape );
+ shapeType = shape.ShapeType();
+ }
+ return make_pair( shapeID, shapeType );
+}
//=======================================================================
-//function : AddVolume
-//purpose :
+//function : GetCentralNode
+//purpose : Return existing or create a new central node for a quardilateral
+// quadratic face given its 8 nodes.
+//@param : force3d - true means node creation in between the given nodes,
+// else node position is found on a geometrical face if any.
//=======================================================================
-/*!
- * Special function for creation quadratic volume
- */
-SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
- const SMDS_MeshNode* n2,
- const SMDS_MeshNode* n3,
- const SMDS_MeshNode* n4,
- const int id,
- const bool force3d)
+
+const SMDS_MeshNode* SMESH_MesherHelper::GetCentralNode(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const SMDS_MeshNode* n3,
+ const SMDS_MeshNode* n4,
+ const SMDS_MeshNode* n12,
+ const SMDS_MeshNode* n23,
+ const SMDS_MeshNode* n34,
+ const SMDS_MeshNode* n41,
+ bool force3d)
{
- SMESHDS_Mesh * meshDS = GetMesh()->GetMeshDS();
- if(!myCreateQuadratic) {
- if(id)
- return meshDS->AddVolumeWithID(n1, n2, n3, n4, id);
- else
- return meshDS->AddVolume(n1, n2, n3, n4);
+ SMDS_MeshNode *centralNode = 0; // central node to return
+
+ // Find an existing central node
+
+ TBiQuad keyOfMap(n1,n2,n3,n4);
+ std::map<TBiQuad, const SMDS_MeshNode* >::iterator itMapCentralNode;
+ itMapCentralNode = myMapWithCentralNode.find( keyOfMap );
+ if ( itMapCentralNode != myMapWithCentralNode.end() )
+ {
+ return (*itMapCentralNode).second;
}
- const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
- const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
- const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,force3d);
+ // Get type of shape for the new central node
- const SMDS_MeshNode* n14 = GetMediumNode(n1,n4,force3d);
- const SMDS_MeshNode* n24 = GetMediumNode(n2,n4,force3d);
- const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
+ TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
+ int solidID = -1;
+ int faceID = -1;
+ TopoDS_Shape shape;
+ TopTools_ListIteratorOfListOfShape it;
- if(id)
- return meshDS->AddVolumeWithID(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34, id);
- else
- return meshDS->AddVolume(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34);
-}
+ std::map< int, int > faceId2nbNodes;
+ std::map< int, int > ::iterator itMapWithIdFace;
+
+ SMESHDS_Mesh* meshDS = GetMeshDS();
+
+ // check if a face lies on a FACE, i.e. its all corner nodes lie either on the FACE or
+ // on sub-shapes of the FACE
+ if ( GetMesh()->HasShapeToMesh() )
+ {
+ const SMDS_MeshNode* nodes[] = { n1, n2, n3, n4 };
+ for(int i = 0; i < 4; i++)
+ {
+ shape = GetSubShapeByNode( nodes[i], meshDS );
+ if ( shape.IsNull() ) break;
+ if ( shape.ShapeType() == TopAbs_SOLID )
+ {
+ solidID = nodes[i]->getshapeId();
+ shapeType = TopAbs_SOLID;
+ break;
+ }
+ if ( shape.ShapeType() == TopAbs_FACE )
+ {
+ faceID = nodes[i]->getshapeId();
+ itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
+ itMapWithIdFace->second++;
+ }
+ else
+ {
+ PShapeIteratorPtr it = GetAncestors(shape, *GetMesh(), TopAbs_FACE );
+ while ( const TopoDS_Shape* face = it->next() )
+ {
+ faceID = meshDS->ShapeToIndex( *face );
+ itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
+ itMapWithIdFace->second++;
+ }
+ }
+ }
+ }
+ if ( solidID < 1 && !faceId2nbNodes.empty() ) // SOLID not found
+ {
+ // find ID of the FACE the four corner nodes belong to
+ itMapWithIdFace = faceId2nbNodes.begin();
+ for ( ; itMapWithIdFace != faceId2nbNodes.end(); ++itMapWithIdFace)
+ {
+ if ( itMapWithIdFace->second == 4 )
+ {
+ shapeType = TopAbs_FACE;
+ faceID = (*itMapWithIdFace).first;
+ break;
+ }
+ }
+ }
+
+ TopoDS_Face F;
+ if ( shapeType == TopAbs_FACE )
+ {
+ F = TopoDS::Face( meshDS->IndexToShape( faceID ));
+ }
+
+ // Create a node
+
+ gp_XY uvAvg;
+ gp_Pnt P;
+ bool toCheck = true;
+ if ( !F.IsNull() && !force3d )
+ {
+ uvAvg = calcTFI (0.5, 0.5,
+ GetNodeUV(F,n1,n3,&toCheck), GetNodeUV(F,n2,n4,&toCheck),
+ GetNodeUV(F,n3,n1,&toCheck), GetNodeUV(F,n4,n2,&toCheck),
+ GetNodeUV(F,n12,n3), GetNodeUV(F,n23,n4),
+ GetNodeUV(F,n34,n2), GetNodeUV(F,n41,n2));
+ TopLoc_Location loc;
+ Handle( Geom_Surface ) S = BRep_Tool::Surface( F, loc );
+ P = S->Value( uvAvg.X(), uvAvg.Y() ).Transformed( loc );
+ centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
+ // if ( mySetElemOnShape ) node is not elem!
+ meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
+ }
+ else // ( force3d || F.IsNull() )
+ {
+ P = calcTFI (0.5, 0.5,
+ SMESH_TNodeXYZ(n1), SMESH_TNodeXYZ(n2),
+ SMESH_TNodeXYZ(n3), SMESH_TNodeXYZ(n4),
+ SMESH_TNodeXYZ(n12), SMESH_TNodeXYZ(n23),
+ SMESH_TNodeXYZ(n34), SMESH_TNodeXYZ(n41));
+ centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
+ if ( !F.IsNull() ) // force3d
+ {
+ uvAvg = (GetNodeUV(F,n1,n3,&toCheck) +
+ GetNodeUV(F,n2,n4,&toCheck) +
+ GetNodeUV(F,n3,n1,&toCheck) +
+ GetNodeUV(F,n4,n2,&toCheck)) / 4;
+ //CheckNodeUV( F, centralNode, uvAvg, 2*BRep_Tool::Tolerance( F ), /*force=*/true);
+ meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
+ }
+ else if ( solidID > 0 )
+ {
+ meshDS->SetNodeInVolume( centralNode, solidID );
+ }
+ else if ( myShapeID > 0 && mySetElemOnShape )
+ {
+ meshDS->SetMeshElementOnShape( centralNode, myShapeID );
+ }
+ }
+ myMapWithCentralNode.insert( std::make_pair( keyOfMap, centralNode ) );
+ return centralNode;
+}
//=======================================================================
-//function : AddVolume
-//purpose :
+//function : GetCentralNode
+//purpose : Return existing or create a new central node for a
+// quadratic triangle given its 6 nodes.
+//@param : force3d - true means node creation in between the given nodes,
+// else node position is found on a geometrical face if any.
//=======================================================================
-/*!
- * Special function for creation quadratic volume
- */
-SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
- const SMDS_MeshNode* n2,
- const SMDS_MeshNode* n3,
- const SMDS_MeshNode* n4,
- const SMDS_MeshNode* n5,
- const SMDS_MeshNode* n6,
- const SMDS_MeshNode* n7,
- const SMDS_MeshNode* n8,
- const int id,
- const bool force3d)
+
+const SMDS_MeshNode* SMESH_MesherHelper::GetCentralNode(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const SMDS_MeshNode* n3,
+ const SMDS_MeshNode* n12,
+ const SMDS_MeshNode* n23,
+ const SMDS_MeshNode* n31,
+ bool force3d)
{
- SMESHDS_Mesh * meshDS = GetMesh()->GetMeshDS();
- if(!myCreateQuadratic) {
- if(id)
- return meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8, id);
- else
- return meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8);
+ SMDS_MeshNode *centralNode = 0; // central node to return
+
+ // Find an existing central node
+
+ TBiQuad keyOfMap(n1,n2,n3);
+ std::map<TBiQuad, const SMDS_MeshNode* >::iterator itMapCentralNode;
+ itMapCentralNode = myMapWithCentralNode.find( keyOfMap );
+ if ( itMapCentralNode != myMapWithCentralNode.end() )
+ {
+ return (*itMapCentralNode).second;
}
- const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
- const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
- const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
- const SMDS_MeshNode* n41 = GetMediumNode(n4,n1,force3d);
+ // Get type of shape for the new central node
+
+ TopAbs_ShapeEnum shapeType = TopAbs_SHAPE;
+ int solidID = -1;
+ int faceID = -1;
+ TopoDS_Shape shape;
+ TopTools_ListIteratorOfListOfShape it;
- const SMDS_MeshNode* n56 = GetMediumNode(n5,n6,force3d);
- const SMDS_MeshNode* n67 = GetMediumNode(n6,n7,force3d);
- const SMDS_MeshNode* n78 = GetMediumNode(n7,n8,force3d);
- const SMDS_MeshNode* n85 = GetMediumNode(n8,n5,force3d);
+ std::map< int, int > faceId2nbNodes;
+ std::map< int, int > ::iterator itMapWithIdFace;
+
+ SMESHDS_Mesh* meshDS = GetMeshDS();
+
+ // check if a face lies on a FACE, i.e. its all corner nodes lie either on the FACE or
+ // on sub-shapes of the FACE
+ if ( GetMesh()->HasShapeToMesh() )
+ {
+ const SMDS_MeshNode* nodes[] = { n1, n2, n3 };
+ for(int i = 0; i < 3; i++)
+ {
+ shape = GetSubShapeByNode( nodes[i], meshDS );
+ if ( shape.IsNull() ) break;
+ if ( shape.ShapeType() == TopAbs_SOLID )
+ {
+ solidID = nodes[i]->getshapeId();
+ shapeType = TopAbs_SOLID;
+ break;
+ }
+ if ( shape.ShapeType() == TopAbs_FACE )
+ {
+ faceID = nodes[i]->getshapeId();
+ itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
+ itMapWithIdFace->second++;
+ }
+ else
+ {
+ PShapeIteratorPtr it = GetAncestors(shape, *GetMesh(), TopAbs_FACE );
+ while ( const TopoDS_Shape* face = it->next() )
+ {
+ faceID = meshDS->ShapeToIndex( *face );
+ itMapWithIdFace = faceId2nbNodes.insert( std::make_pair( faceID, 0 ) ).first;
+ itMapWithIdFace->second++;
+ }
+ }
+ }
+ }
+ if ( solidID < 1 && !faceId2nbNodes.empty() ) // SOLID not found
+ {
+ // find ID of the FACE the four corner nodes belong to
+ itMapWithIdFace = faceId2nbNodes.begin();
+ for ( ; itMapWithIdFace != faceId2nbNodes.end(); ++itMapWithIdFace)
+ {
+ if ( itMapWithIdFace->second == 3 )
+ {
+ shapeType = TopAbs_FACE;
+ faceID = (*itMapWithIdFace).first;
+ break;
+ }
+ }
+ }
- const SMDS_MeshNode* n15 = GetMediumNode(n1,n5,force3d);
- const SMDS_MeshNode* n26 = GetMediumNode(n2,n6,force3d);
- const SMDS_MeshNode* n37 = GetMediumNode(n3,n7,force3d);
- const SMDS_MeshNode* n48 = GetMediumNode(n4,n8,force3d);
+ TopoDS_Face F;
+ gp_XY uvAvg;
+ bool badTria=false;
- if(id)
- return meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
- n12, n23, n34, n41, n56, n67,
- n78, n85, n15, n26, n37, n48, id);
- else
- return meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
- n12, n23, n34, n41, n56, n67,
- n78, n85, n15, n26, n37, n48);
+ if ( shapeType == TopAbs_FACE )
+ {
+ F = TopoDS::Face( meshDS->IndexToShape( faceID ));
+ bool check;
+ gp_XY uv1 = GetNodeUV( F, n1, n23, &check );
+ gp_XY uv2 = GetNodeUV( F, n2, n31, &check );
+ gp_XY uv3 = GetNodeUV( F, n3, n12, &check );
+ gp_XY uv12 = GetNodeUV( F, n12, n3, &check );
+ gp_XY uv23 = GetNodeUV( F, n23, n1, &check );
+ gp_XY uv31 = GetNodeUV( F, n31, n2, &check );
+ uvAvg = GetCenterUV( uv1,uv2,uv3, uv12,uv23,uv31, &badTria );
+ if ( badTria )
+ force3d = false;
+ }
+
+ // Create a central node
+
+ gp_Pnt P;
+ if ( !F.IsNull() && !force3d )
+ {
+ TopLoc_Location loc;
+ Handle( Geom_Surface ) S = BRep_Tool::Surface( F, loc );
+ P = S->Value( uvAvg.X(), uvAvg.Y() ).Transformed( loc );
+ centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
+ // if ( mySetElemOnShape ) node is not elem!
+ meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
+ }
+ else // ( force3d || F.IsNull() )
+ {
+ P = ( SMESH_TNodeXYZ( n12 ) +
+ SMESH_TNodeXYZ( n23 ) +
+ SMESH_TNodeXYZ( n31 ) ) / 3;
+ centralNode = meshDS->AddNode( P.X(), P.Y(), P.Z() );
+
+ if ( !F.IsNull() ) // force3d
+ {
+ meshDS->SetNodeOnFace( centralNode, faceID, uvAvg.X(), uvAvg.Y() );
+ }
+ else if ( solidID > 0 )
+ {
+ meshDS->SetNodeInVolume( centralNode, solidID );
+ }
+ else if ( myShapeID > 0 && mySetElemOnShape )
+ {
+ meshDS->SetMeshElementOnShape( centralNode, myShapeID );
+ }
+ }
+ myMapWithCentralNode.insert( std::make_pair( keyOfMap, centralNode ) );
+ return centralNode;
}
+//=======================================================================
+//function : GetMediumNode
+//purpose : Return existing or create a new medium node between given ones
+//=======================================================================
+
+const SMDS_MeshNode* SMESH_MesherHelper::GetMediumNode(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ bool force3d)
+{
+ // Find existing node
+
+ SMESH_TLink link(n1,n2);
+ ItTLinkNode itLN = myTLinkNodeMap.find( link );
+ if ( itLN != myTLinkNodeMap.end() ) {
+ return (*itLN).second;
+ }
+
+ // Create medium node
+
+ SMDS_MeshNode* n12;
+ SMESHDS_Mesh* meshDS = GetMeshDS();
+
+ if ( IsSeamShape( n1->getshapeId() ))
+ // to get a correct UV of a node on seam, the second node must have checked UV
+ std::swap( n1, n2 );
+
+ // get type of shape for the new medium node
+ int faceID = -1, edgeID = -1;
+ TopoDS_Edge E; double u [2];
+ TopoDS_Face F; gp_XY uv[2];
+ bool uvOK[2] = { false, false };
+
+ pair<int, TopAbs_ShapeEnum> pos = GetMediumPos( n1, n2, mySetElemOnShape );
+ // calling GetMediumPos() with useCurSubShape=mySetElemOnShape is OK only for the
+ // case where the lower dim mesh is already constructed, else, nodes on EDGEs are
+ // assigned to FACE, for example.
+
+ // get positions of the given nodes on shapes
+ if ( pos.second == TopAbs_FACE )
+ {
+ F = TopoDS::Face(meshDS->IndexToShape( faceID = pos.first ));
+ uv[0] = GetNodeUV(F,n1,n2, force3d ? 0 : &uvOK[0]);
+ uv[1] = GetNodeUV(F,n2,n1, force3d ? 0 : &uvOK[1]);
+ }
+ else if ( pos.second == TopAbs_EDGE )
+ {
+ const SMDS_PositionPtr Pos1 = n1->GetPosition();
+ const SMDS_PositionPtr Pos2 = n2->GetPosition();
+ if ( Pos1->GetTypeOfPosition()==SMDS_TOP_EDGE &&
+ Pos2->GetTypeOfPosition()==SMDS_TOP_EDGE &&
+ n1->getshapeId() != n2->getshapeId() )
+ {
+ // issue 0021006
+ return getMediumNodeOnComposedWire(n1,n2,force3d);
+ }
+ E = TopoDS::Edge(meshDS->IndexToShape( edgeID = pos.first ));
+ try {
+ u[0] = GetNodeU(E,n1,n2, force3d ? 0 : &uvOK[0]);
+ u[1] = GetNodeU(E,n2,n1, force3d ? 0 : &uvOK[1]);
+ }
+ catch ( Standard_Failure& f )
+ {
+ // issue 22502 / a node is on VERTEX not belonging to E
+ // issue 22568 / both nodes are on non-connected VERTEXes
+ return getMediumNodeOnComposedWire(n1,n2,force3d);
+ }
+ }
+
+ if ( !force3d & uvOK[0] && uvOK[1] )
+ {
+ // we try to create medium node using UV parameters of
+ // nodes, else - medium between corresponding 3d points
+ if( ! F.IsNull() )
+ {
+ //if ( uvOK[0] && uvOK[1] )
+ {
+ if ( IsDegenShape( n1->getshapeId() )) {
+ if ( myParIndex & U_periodic ) uv[0].SetCoord( 1, uv[1].Coord( 1 ));
+ else uv[0].SetCoord( 2, uv[1].Coord( 2 ));
+ }
+ else if ( IsDegenShape( n2->getshapeId() )) {
+ if ( myParIndex & U_periodic ) uv[1].SetCoord( 1, uv[0].Coord( 1 ));
+ else uv[1].SetCoord( 2, uv[0].Coord( 2 ));
+ }
+ TopLoc_Location loc;
+ Handle(Geom_Surface) S = BRep_Tool::Surface(F,loc);
+ gp_XY UV = GetMiddleUV( S, uv[0], uv[1] );
+ gp_Pnt P = S->Value( UV.X(), UV.Y() ).Transformed(loc);
+ n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
+ // if ( mySetElemOnShape ) node is not elem!
+ meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y());
+ myTLinkNodeMap.insert(make_pair(link,n12));
+ return n12;
+ }
+ }
+ else if ( !E.IsNull() )
+ {
+ double f,l;
+ Handle(Geom_Curve) C = BRep_Tool::Curve(E, f, l);
+ if(!C.IsNull())
+ {
+ Standard_Boolean isPeriodic = C->IsPeriodic();
+ double U;
+ if(isPeriodic) {
+ Standard_Real Period = C->Period();
+ Standard_Real p = u[1]+ShapeAnalysis::AdjustByPeriod(u[1],u[0],Period);
+ Standard_Real pmid = (u[0]+p)/2.;
+ U = pmid+ShapeAnalysis::AdjustToPeriod(pmid,C->FirstParameter(),C->LastParameter());
+ }
+ else
+ U = (u[0]+u[1])/2.;
+
+ gp_Pnt P = C->Value( U );
+ n12 = meshDS->AddNode(P.X(), P.Y(), P.Z());
+ //if ( mySetElemOnShape ) node is not elem!
+ meshDS->SetNodeOnEdge(n12, edgeID, U);
+ myTLinkNodeMap.insert(make_pair(link,n12));
+ return n12;
+ }
+ }
+ }
+
+ // 3d variant
+ double x = ( n1->X() + n2->X() )/2.;
+ double y = ( n1->Y() + n2->Y() )/2.;
+ double z = ( n1->Z() + n2->Z() )/2.;
+ n12 = meshDS->AddNode(x,y,z);
+ //if ( mySetElemOnShape ) node is not elem!
+ {
+ if ( !F.IsNull() )
+ {
+ gp_XY UV = ( uv[0] + uv[1] ) / 2.;
+ CheckNodeUV( F, n12, UV, 2 * BRep_Tool::Tolerance( F ), /*force=*/true);
+ meshDS->SetNodeOnFace(n12, faceID, UV.X(), UV.Y() );
+ }
+ else if ( !E.IsNull() )
+ {
+ double U = ( u[0] + u[1] ) / 2.;
+ CheckNodeU( E, n12, U, 2 * BRep_Tool::Tolerance( E ), /*force=*/true);
+ meshDS->SetNodeOnEdge(n12, edgeID, U);
+ }
+ else if ( myShapeID > 0 && mySetElemOnShape )
+ {
+ meshDS->SetMeshElementOnShape(n12, myShapeID);
+ }
+ }
+
+ myTLinkNodeMap.insert( make_pair( link, n12 ));
+ return n12;
+}
+
+//================================================================================
+/*!
+ * \brief Makes a medium node if nodes reside different edges
+ */
+//================================================================================
+
+const SMDS_MeshNode* SMESH_MesherHelper::getMediumNodeOnComposedWire(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ bool force3d)
+{
+ SMESH_TNodeXYZ p1( n1 ), p2( n2 );
+ gp_Pnt middle = 0.5 * p1 + 0.5 * p2;
+ SMDS_MeshNode* n12 = AddNode( middle.X(), middle.Y(), middle.Z() );
+
+ // To find position on edge and 3D position for n12,
+ // project <middle> to 2 edges and select projection most close to <middle>
+
+ TopoDS_Edge bestEdge;
+ double u = 0, distMiddleProj = Precision::Infinite(), distXYZ[4], f,l;
+
+ // get shapes under the nodes
+ TopoDS_Shape shape[2];
+ int nbShapes = 0;
+ for ( int is2nd = 0; is2nd < 2; ++is2nd )
+ {
+ const SMDS_MeshNode* n = is2nd ? n2 : n1;
+ TopoDS_Shape S = GetSubShapeByNode( n, GetMeshDS() );
+ if ( !S.IsNull() )
+ shape[ nbShapes++ ] = S;
+ }
+ // get EDGEs
+ vector< TopoDS_Shape > edges;
+ for ( int iS = 0; iS < nbShapes; ++iS )
+ {
+ switch ( shape[iS].ShapeType() ) {
+ case TopAbs_EDGE:
+ {
+ edges.push_back( shape[iS] );
+ break;
+ }
+ case TopAbs_VERTEX:
+ {
+ TopoDS_Shape edge;
+ if ( nbShapes == 2 && iS==0 && shape[1-iS].ShapeType() == TopAbs_VERTEX )
+ edge = GetCommonAncestor( shape[iS], shape[1-iS], *myMesh, TopAbs_EDGE );
+
+ if ( edge.IsNull() )
+ {
+ PShapeIteratorPtr eIt = GetAncestors( shape[iS], *myMesh, TopAbs_EDGE );
+ while( const TopoDS_Shape* e = eIt->next() )
+ edges.push_back( *e );
+ }
+ break;
+ }
+ case TopAbs_FACE:
+ {
+ if ( nbShapes == 1 || shape[1-iS].ShapeType() < TopAbs_EDGE )
+ for ( TopExp_Explorer e( shape[iS], TopAbs_EDGE ); e.More(); e.Next() )
+ edges.push_back( e.Current() );
+ break;
+ }
+ default:
+ continue;
+ }
+ }
+ // project to get U of projection and distance from middle to projection
+ for ( size_t iE = 0; iE < edges.size(); ++iE )
+ {
+ const TopoDS_Edge& edge = TopoDS::Edge( edges[ iE ]);
+ distXYZ[0] = distMiddleProj;
+ double testU = 0;
+ CheckNodeU( edge, n12, testU, 2 * BRep_Tool::Tolerance(edge), /*force=*/true, distXYZ );
+ if ( distXYZ[0] < distMiddleProj )
+ {
+ distMiddleProj = distXYZ[0];
+ u = testU;
+ bestEdge = edge;
+ }
+ }
+ // {
+ // // both projections failed; set n12 on the edge of n1 with U of a common vertex
+ // TopoDS_Vertex vCommon;
+ // if ( TopExp::CommonVertex( edges[0], edges[1], vCommon ))
+ // u = BRep_Tool::Parameter( vCommon, edges[0] );
+ // else
+ // {
+ // double f,l, u0 = GetNodeU( edges[0], n1 );
+ // BRep_Tool::Range( edges[0],f,l );
+ // u = ( fabs(u0-f) < fabs(u0-l) ) ? f : l;
+ // }
+ // iOkEdge = 0;
+ // distMiddleProj = 0;
+ // }
+
+ if ( !bestEdge.IsNull() )
+ {
+ // move n12 to position of a successfull projection
+ //double tol = BRep_Tool::Tolerance(edges[ iOkEdge ]);
+ if ( !force3d /*&& distMiddleProj > 2*tol*/ )
+ {
+ TopLoc_Location loc;
+ Handle(Geom_Curve) curve = BRep_Tool::Curve( bestEdge,loc,f,l );
+ gp_Pnt p = curve->Value( u ).Transformed( loc );
+ GetMeshDS()->MoveNode( n12, p.X(), p.Y(), p.Z() );
+ }
+ //if ( mySetElemOnShape ) node is not elem!
+ {
+ int edgeID = GetMeshDS()->ShapeToIndex( bestEdge );
+ if ( edgeID != n12->getshapeId() )
+ GetMeshDS()->UnSetNodeOnShape( n12 );
+ GetMeshDS()->SetNodeOnEdge(n12, edgeID, u);
+ }
+ }
+ myTLinkNodeMap.insert( make_pair( SMESH_TLink(n1,n2), n12 ));
+
+ return n12;
+}
+
+//=======================================================================
+//function : AddNode
+//purpose : Creates a node
+//=======================================================================
+
+SMDS_MeshNode* SMESH_MesherHelper::AddNode(double x, double y, double z, int ID,
+ double u, double v)
+{
+ SMESHDS_Mesh * meshDS = GetMeshDS();
+ SMDS_MeshNode* node = 0;
+ if ( ID )
+ node = meshDS->AddNodeWithID( x, y, z, ID );
+ else
+ node = meshDS->AddNode( x, y, z );
+ if ( mySetElemOnShape && myShapeID > 0 ) { // node is not elem ?
+ switch ( myShape.ShapeType() ) {
+ case TopAbs_SOLID: meshDS->SetNodeInVolume( node, myShapeID); break;
+ case TopAbs_SHELL: meshDS->SetNodeInVolume( node, myShapeID); break;
+ case TopAbs_FACE: meshDS->SetNodeOnFace( node, myShapeID, u, v); break;
+ case TopAbs_EDGE: meshDS->SetNodeOnEdge( node, myShapeID, u); break;
+ case TopAbs_VERTEX: meshDS->SetNodeOnVertex( node, myShapeID); break;
+ default: ;
+ }
+ }
+ return node;
+}
+
+//=======================================================================
+//function : AddEdge
+//purpose : Creates quadratic or linear edge
+//=======================================================================
+
+SMDS_MeshEdge* SMESH_MesherHelper::AddEdge(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const int id,
+ const bool force3d)
+{
+ SMESHDS_Mesh * meshDS = GetMeshDS();
+
+ SMDS_MeshEdge* edge = 0;
+ if (myCreateQuadratic) {
+ const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
+ if(id)
+ edge = meshDS->AddEdgeWithID(n1, n2, n12, id);
+ else
+ edge = meshDS->AddEdge(n1, n2, n12);
+ }
+ else {
+ if(id)
+ edge = meshDS->AddEdgeWithID(n1, n2, id);
+ else
+ edge = meshDS->AddEdge(n1, n2);
+ }
+
+ if ( mySetElemOnShape && myShapeID > 0 )
+ meshDS->SetMeshElementOnShape( edge, myShapeID );
+
+ return edge;
+}
+
+//=======================================================================
+//function : AddFace
+//purpose : Creates quadratic or linear triangle
+//=======================================================================
+
+SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const SMDS_MeshNode* n3,
+ const int id,
+ const bool force3d)
+{
+ SMESHDS_Mesh * meshDS = GetMeshDS();
+ SMDS_MeshFace* elem = 0;
+
+ if( n1==n2 || n2==n3 || n3==n1 )
+ return elem;
+
+ if(!myCreateQuadratic) {
+ if(id)
+ elem = meshDS->AddFaceWithID(n1, n2, n3, id);
+ else
+ elem = meshDS->AddFace(n1, n2, n3);
+ }
+ else {
+ const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
+ const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
+ const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,force3d);
+ if(myCreateBiQuadratic)
+ {
+ const SMDS_MeshNode* nCenter = GetCentralNode(n1, n2, n3, n12, n23, n31, force3d);
+ if(id)
+ elem = meshDS->AddFaceWithID(n1, n2, n3, n12, n23, n31, nCenter, id);
+ else
+ elem = meshDS->AddFace(n1, n2, n3, n12, n23, n31, nCenter);
+ }
+ else
+ {
+ if(id)
+ elem = meshDS->AddFaceWithID(n1, n2, n3, n12, n23, n31, id);
+ else
+ elem = meshDS->AddFace(n1, n2, n3, n12, n23, n31);
+ }
+ }
+ if ( mySetElemOnShape && myShapeID > 0 )
+ meshDS->SetMeshElementOnShape( elem, myShapeID );
+
+ return elem;
+}
+
+//=======================================================================
+//function : AddFace
+//purpose : Creates bi-quadratic, quadratic or linear quadrangle
+//=======================================================================
+
+SMDS_MeshFace* SMESH_MesherHelper::AddFace(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const SMDS_MeshNode* n3,
+ const SMDS_MeshNode* n4,
+ const int id,
+ const bool force3d)
+{
+ SMESHDS_Mesh * meshDS = GetMeshDS();
+ SMDS_MeshFace* elem = 0;
+
+ if( n1==n2 ) {
+ return AddFace(n1,n3,n4,id,force3d);
+ }
+ if( n1==n3 ) {
+ return AddFace(n1,n2,n4,id,force3d);
+ }
+ if( n1==n4 ) {
+ return AddFace(n1,n2,n3,id,force3d);
+ }
+ if( n2==n3 ) {
+ return AddFace(n1,n2,n4,id,force3d);
+ }
+ if( n2==n4 ) {
+ return AddFace(n1,n2,n3,id,force3d);
+ }
+ if( n3==n4 ) {
+ return AddFace(n1,n2,n3,id,force3d);
+ }
+
+ if(!myCreateQuadratic) {
+ if(id)
+ elem = meshDS->AddFaceWithID(n1, n2, n3, n4, id);
+ else
+ elem = meshDS->AddFace(n1, n2, n3, n4);
+ }
+ else {
+ const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
+ const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
+ const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
+ const SMDS_MeshNode* n41 = GetMediumNode(n4,n1,force3d);
+ if(myCreateBiQuadratic)
+ {
+ const SMDS_MeshNode* nCenter = GetCentralNode(n1, n2, n3, n4, n12, n23, n34, n41, force3d);
+ if(id)
+ elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, nCenter, id);
+ else
+ elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41, nCenter);
+ }
+ else
+ {
+ if(id)
+ elem = meshDS->AddFaceWithID(n1, n2, n3, n4, n12, n23, n34, n41, id);
+ else
+ elem = meshDS->AddFace(n1, n2, n3, n4, n12, n23, n34, n41);
+ }
+ }
+ if ( mySetElemOnShape && myShapeID > 0 )
+ meshDS->SetMeshElementOnShape( elem, myShapeID );
+
+ return elem;
+}
+
+//=======================================================================
+//function : AddPolygonalFace
+//purpose : Creates polygon, with additional nodes in quadratic mesh
+//=======================================================================
+
+SMDS_MeshFace* SMESH_MesherHelper::AddPolygonalFace (const vector<const SMDS_MeshNode*>& nodes,
+ const int id,
+ const bool force3d)
+{
+ SMESHDS_Mesh * meshDS = GetMeshDS();
+ SMDS_MeshFace* elem = 0;
+
+ if(!myCreateQuadratic) {
+ if(id)
+ elem = meshDS->AddPolygonalFaceWithID(nodes, id);
+ else
+ elem = meshDS->AddPolygonalFace(nodes);
+ }
+ else {
+ vector<const SMDS_MeshNode*> newNodes;
+ for ( int i = 0; i < nodes.size(); ++i )
+ {
+ const SMDS_MeshNode* n1 = nodes[i];
+ const SMDS_MeshNode* n2 = nodes[(i+1)%nodes.size()];
+ const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
+ newNodes.push_back( n1 );
+ newNodes.push_back( n12 );
+ }
+ if(id)
+ elem = meshDS->AddPolygonalFaceWithID(newNodes, id);
+ else
+ elem = meshDS->AddPolygonalFace(newNodes);
+ }
+ if ( mySetElemOnShape && myShapeID > 0 )
+ meshDS->SetMeshElementOnShape( elem, myShapeID );
+
+ return elem;
+}
+
+//=======================================================================
+//function : AddVolume
+//purpose : Creates quadratic or linear prism
+//=======================================================================
+
+SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const SMDS_MeshNode* n3,
+ const SMDS_MeshNode* n4,
+ const SMDS_MeshNode* n5,
+ const SMDS_MeshNode* n6,
+ const int id,
+ const bool force3d)
+{
+ SMESHDS_Mesh * meshDS = GetMeshDS();
+ SMDS_MeshVolume* elem = 0;
+ if(!myCreateQuadratic) {
+ if(id)
+ elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, id);
+ else
+ elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6);
+ }
+ else {
+ const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
+ const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
+ const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,force3d);
+
+ const SMDS_MeshNode* n45 = GetMediumNode(n4,n5,force3d);
+ const SMDS_MeshNode* n56 = GetMediumNode(n5,n6,force3d);
+ const SMDS_MeshNode* n64 = GetMediumNode(n6,n4,force3d);
+
+ const SMDS_MeshNode* n14 = GetMediumNode(n1,n4,force3d);
+ const SMDS_MeshNode* n25 = GetMediumNode(n2,n5,force3d);
+ const SMDS_MeshNode* n36 = GetMediumNode(n3,n6,force3d);
+
+ if(id)
+ elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6,
+ n12, n23, n31, n45, n56, n64, n14, n25, n36, id);
+ else
+ elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6,
+ n12, n23, n31, n45, n56, n64, n14, n25, n36);
+ }
+ if ( mySetElemOnShape && myShapeID > 0 )
+ meshDS->SetMeshElementOnShape( elem, myShapeID );
+
+ return elem;
+}
+
+//=======================================================================
+//function : AddVolume
+//purpose : Creates quadratic or linear tetrahedron
+//=======================================================================
+
+SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const SMDS_MeshNode* n3,
+ const SMDS_MeshNode* n4,
+ const int id,
+ const bool force3d)
+{
+ SMESHDS_Mesh * meshDS = GetMeshDS();
+ SMDS_MeshVolume* elem = 0;
+ if(!myCreateQuadratic) {
+ if(id)
+ elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, id);
+ else
+ elem = meshDS->AddVolume(n1, n2, n3, n4);
+ }
+ else {
+ const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
+ const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
+ const SMDS_MeshNode* n31 = GetMediumNode(n3,n1,force3d);
+
+ const SMDS_MeshNode* n14 = GetMediumNode(n1,n4,force3d);
+ const SMDS_MeshNode* n24 = GetMediumNode(n2,n4,force3d);
+ const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
+
+ if(id)
+ elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34, id);
+ else
+ elem = meshDS->AddVolume(n1, n2, n3, n4, n12, n23, n31, n14, n24, n34);
+ }
+ if ( mySetElemOnShape && myShapeID > 0 )
+ meshDS->SetMeshElementOnShape( elem, myShapeID );
+
+ return elem;
+}
+
+//=======================================================================
+//function : AddVolume
+//purpose : Creates quadratic or linear pyramid
+//=======================================================================
+
+SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const SMDS_MeshNode* n3,
+ const SMDS_MeshNode* n4,
+ const SMDS_MeshNode* n5,
+ const int id,
+ const bool force3d)
+{
+ SMDS_MeshVolume* elem = 0;
+ if(!myCreateQuadratic) {
+ if(id)
+ elem = GetMeshDS()->AddVolumeWithID(n1, n2, n3, n4, n5, id);
+ else
+ elem = GetMeshDS()->AddVolume(n1, n2, n3, n4, n5);
+ }
+ else {
+ const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
+ const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
+ const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
+ const SMDS_MeshNode* n41 = GetMediumNode(n4,n1,force3d);
+
+ const SMDS_MeshNode* n15 = GetMediumNode(n1,n5,force3d);
+ const SMDS_MeshNode* n25 = GetMediumNode(n2,n5,force3d);
+ const SMDS_MeshNode* n35 = GetMediumNode(n3,n5,force3d);
+ const SMDS_MeshNode* n45 = GetMediumNode(n4,n5,force3d);
+
+ if(id)
+ elem = GetMeshDS()->AddVolumeWithID ( n1, n2, n3, n4, n5,
+ n12, n23, n34, n41,
+ n15, n25, n35, n45,
+ id);
+ else
+ elem = GetMeshDS()->AddVolume( n1, n2, n3, n4, n5,
+ n12, n23, n34, n41,
+ n15, n25, n35, n45);
+ }
+ if ( mySetElemOnShape && myShapeID > 0 )
+ GetMeshDS()->SetMeshElementOnShape( elem, myShapeID );
+
+ return elem;
+}
+
+//=======================================================================
+//function : AddVolume
+//purpose : Creates bi-quadratic, quadratic or linear hexahedron
+//=======================================================================
+
+SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const SMDS_MeshNode* n3,
+ const SMDS_MeshNode* n4,
+ const SMDS_MeshNode* n5,
+ const SMDS_MeshNode* n6,
+ const SMDS_MeshNode* n7,
+ const SMDS_MeshNode* n8,
+ const int id,
+ const bool force3d)
+{
+ SMESHDS_Mesh * meshDS = GetMeshDS();
+ SMDS_MeshVolume* elem = 0;
+ if(!myCreateQuadratic) {
+ if(id)
+ elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8, id);
+ else
+ elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8);
+ }
+ else {
+ const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
+ const SMDS_MeshNode* n23 = GetMediumNode(n2,n3,force3d);
+ const SMDS_MeshNode* n34 = GetMediumNode(n3,n4,force3d);
+ const SMDS_MeshNode* n41 = GetMediumNode(n4,n1,force3d);
+
+ const SMDS_MeshNode* n56 = GetMediumNode(n5,n6,force3d);
+ const SMDS_MeshNode* n67 = GetMediumNode(n6,n7,force3d);
+ const SMDS_MeshNode* n78 = GetMediumNode(n7,n8,force3d);
+ const SMDS_MeshNode* n85 = GetMediumNode(n8,n5,force3d);
+
+ const SMDS_MeshNode* n15 = GetMediumNode(n1,n5,force3d);
+ const SMDS_MeshNode* n26 = GetMediumNode(n2,n6,force3d);
+ const SMDS_MeshNode* n37 = GetMediumNode(n3,n7,force3d);
+ const SMDS_MeshNode* n48 = GetMediumNode(n4,n8,force3d);
+ if(myCreateBiQuadratic)
+ {
+ const SMDS_MeshNode* n1234 = GetCentralNode(n1,n2,n3,n4,n12,n23,n34,n41,force3d);
+ const SMDS_MeshNode* n1256 = GetCentralNode(n1,n2,n5,n6,n12,n26,n56,n15,force3d);
+ const SMDS_MeshNode* n2367 = GetCentralNode(n2,n3,n6,n7,n23,n37,n67,n26,force3d);
+ const SMDS_MeshNode* n3478 = GetCentralNode(n3,n4,n7,n8,n34,n48,n78,n37,force3d);
+ const SMDS_MeshNode* n1458 = GetCentralNode(n1,n4,n5,n8,n41,n48,n15,n85,force3d);
+ const SMDS_MeshNode* n5678 = GetCentralNode(n5,n6,n7,n8,n56,n67,n78,n85,force3d);
+
+ vector<gp_XYZ> pointsOnShapes( SMESH_Block::ID_Shell );
+
+ pointsOnShapes[ SMESH_Block::ID_V000 ] = SMESH_TNodeXYZ( n4 );
+ pointsOnShapes[ SMESH_Block::ID_V100 ] = SMESH_TNodeXYZ( n8 );
+ pointsOnShapes[ SMESH_Block::ID_V010 ] = SMESH_TNodeXYZ( n3 );
+ pointsOnShapes[ SMESH_Block::ID_V110 ] = SMESH_TNodeXYZ( n7 );
+ pointsOnShapes[ SMESH_Block::ID_V001 ] = SMESH_TNodeXYZ( n1 );
+ pointsOnShapes[ SMESH_Block::ID_V101 ] = SMESH_TNodeXYZ( n5 );
+ pointsOnShapes[ SMESH_Block::ID_V011 ] = SMESH_TNodeXYZ( n2 );
+ pointsOnShapes[ SMESH_Block::ID_V111 ] = SMESH_TNodeXYZ( n6 );
+
+ pointsOnShapes[ SMESH_Block::ID_Ex00 ] = SMESH_TNodeXYZ( n48 );
+ pointsOnShapes[ SMESH_Block::ID_Ex10 ] = SMESH_TNodeXYZ( n37 );
+ pointsOnShapes[ SMESH_Block::ID_E0y0 ] = SMESH_TNodeXYZ( n15 );
+ pointsOnShapes[ SMESH_Block::ID_E1y0 ] = SMESH_TNodeXYZ( n26 );
+ pointsOnShapes[ SMESH_Block::ID_Ex01 ] = SMESH_TNodeXYZ( n34 );
+ pointsOnShapes[ SMESH_Block::ID_Ex11 ] = SMESH_TNodeXYZ( n78 );
+ pointsOnShapes[ SMESH_Block::ID_E0y1 ] = SMESH_TNodeXYZ( n12 );
+ pointsOnShapes[ SMESH_Block::ID_E1y1 ] = SMESH_TNodeXYZ( n56 );
+ pointsOnShapes[ SMESH_Block::ID_E00z ] = SMESH_TNodeXYZ( n41 );
+ pointsOnShapes[ SMESH_Block::ID_E10z ] = SMESH_TNodeXYZ( n85 );
+ pointsOnShapes[ SMESH_Block::ID_E01z ] = SMESH_TNodeXYZ( n23 );
+ pointsOnShapes[ SMESH_Block::ID_E11z ] = SMESH_TNodeXYZ( n67 );
+
+ pointsOnShapes[ SMESH_Block::ID_Fxy0 ] = SMESH_TNodeXYZ( n3478 );
+ pointsOnShapes[ SMESH_Block::ID_Fxy1 ] = SMESH_TNodeXYZ( n1256 );
+ pointsOnShapes[ SMESH_Block::ID_Fx0z ] = SMESH_TNodeXYZ( n1458 );
+ pointsOnShapes[ SMESH_Block::ID_Fx1z ] = SMESH_TNodeXYZ( n2367 );
+ pointsOnShapes[ SMESH_Block::ID_F0yz ] = SMESH_TNodeXYZ( n1234 );
+ pointsOnShapes[ SMESH_Block::ID_F1yz ] = SMESH_TNodeXYZ( n5678 );
+
+ gp_XYZ centerCube(0.5, 0.5, 0.5);
+ gp_XYZ nCenterElem;
+ SMESH_Block::ShellPoint( centerCube, pointsOnShapes, nCenterElem );
+ const SMDS_MeshNode* nCenter =
+ meshDS->AddNode( nCenterElem.X(), nCenterElem.Y(), nCenterElem.Z() );
+ meshDS->SetNodeInVolume( nCenter, myShapeID );
+
+ if(id)
+ elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
+ n12, n23, n34, n41, n56, n67,
+ n78, n85, n15, n26, n37, n48,
+ n1234, n1256, n2367, n3478, n1458, n5678, nCenter, id);
+ else
+ elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
+ n12, n23, n34, n41, n56, n67,
+ n78, n85, n15, n26, n37, n48,
+ n1234, n1256, n2367, n3478, n1458, n5678, nCenter);
+ }
+ else
+ {
+ if(id)
+ elem = meshDS->AddVolumeWithID(n1, n2, n3, n4, n5, n6, n7, n8,
+ n12, n23, n34, n41, n56, n67,
+ n78, n85, n15, n26, n37, n48, id);
+ else
+ elem = meshDS->AddVolume(n1, n2, n3, n4, n5, n6, n7, n8,
+ n12, n23, n34, n41, n56, n67,
+ n78, n85, n15, n26, n37, n48);
+ }
+ }
+ if ( mySetElemOnShape && myShapeID > 0 )
+ meshDS->SetMeshElementOnShape( elem, myShapeID );
+
+ return elem;
+}
+
+//=======================================================================
+//function : AddVolume
+//purpose : Creates LINEAR!!!!!!!!! octahedron
+//=======================================================================
+
+SMDS_MeshVolume* SMESH_MesherHelper::AddVolume(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const SMDS_MeshNode* n3,
+ const SMDS_MeshNode* n4,
+ const SMDS_MeshNode* n5,
+ const SMDS_MeshNode* n6,
+ const SMDS_MeshNode* n7,
+ const SMDS_MeshNode* n8,
+ const SMDS_MeshNode* n9,
+ const SMDS_MeshNode* n10,
+ const SMDS_MeshNode* n11,
+ const SMDS_MeshNode* n12,
+ const int id,
+ bool force3d)
+{
+ SMESHDS_Mesh * meshDS = GetMeshDS();
+ SMDS_MeshVolume* elem = 0;
+ if(id)
+ elem = meshDS->AddVolumeWithID(n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12,id);
+ else
+ elem = meshDS->AddVolume(n1,n2,n3,n4,n5,n6,n7,n8,n9,n10,n11,n12);
+ if ( mySetElemOnShape && myShapeID > 0 )
+ meshDS->SetMeshElementOnShape( elem, myShapeID );
+ return elem;
+}
+
+//=======================================================================
+//function : AddPolyhedralVolume
+//purpose : Creates polyhedron. In quadratic mesh, adds medium nodes
+//=======================================================================
+
+SMDS_MeshVolume*
+SMESH_MesherHelper::AddPolyhedralVolume (const std::vector<const SMDS_MeshNode*>& nodes,
+ const std::vector<int>& quantities,
+ const int id,
+ const bool force3d)
+{
+ SMESHDS_Mesh * meshDS = GetMeshDS();
+ SMDS_MeshVolume* elem = 0;
+ if(!myCreateQuadratic)
+ {
+ if(id)
+ elem = meshDS->AddPolyhedralVolumeWithID(nodes, quantities, id);
+ else
+ elem = meshDS->AddPolyhedralVolume(nodes, quantities);
+ }
+ else
+ {
+ vector<const SMDS_MeshNode*> newNodes;
+ vector<int> newQuantities;
+ for ( int iFace=0, iN=0; iFace < quantities.size(); ++iFace)
+ {
+ int nbNodesInFace = quantities[iFace];
+ newQuantities.push_back(0);
+ for ( int i = 0; i < nbNodesInFace; ++i )
+ {
+ const SMDS_MeshNode* n1 = nodes[ iN + i ];
+ newNodes.push_back( n1 );
+ newQuantities.back()++;
+
+ const SMDS_MeshNode* n2 = nodes[ iN + ( i+1==nbNodesInFace ? 0 : i+1 )];
+// if ( n1->GetPosition()->GetTypeOfPosition() != SMDS_TOP_3DSPACE &&
+// n2->GetPosition()->GetTypeOfPosition() != SMDS_TOP_3DSPACE )
+ {
+ const SMDS_MeshNode* n12 = GetMediumNode(n1,n2,force3d);
+ newNodes.push_back( n12 );
+ newQuantities.back()++;
+ }
+ }
+ iN += nbNodesInFace;
+ }
+ if(id)
+ elem = meshDS->AddPolyhedralVolumeWithID( newNodes, newQuantities, id );
+ else
+ elem = meshDS->AddPolyhedralVolume( newNodes, newQuantities );
+ }
+ if ( mySetElemOnShape && myShapeID > 0 )
+ meshDS->SetMeshElementOnShape( elem, myShapeID );
+
+ return elem;
+}
+
+namespace
+{
+ //================================================================================
+ /*!
+ * \brief Check if a node belongs to any face of sub-mesh
+ */
+ //================================================================================
+
+ bool isNodeInSubMesh( const SMDS_MeshNode* n, const SMESHDS_SubMesh* sm )
+ {
+ SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator( SMDSAbs_Face );
+ while ( fIt->more() )
+ if ( sm->Contains( fIt->next() ))
+ return true;
+ return false;
+ }
+}
+
+//=======================================================================
+//function : IsSameElemGeometry
+//purpose : Returns true if all elements of a sub-mesh are of same shape
+//=======================================================================
+
+bool SMESH_MesherHelper::IsSameElemGeometry(const SMESHDS_SubMesh* smDS,
+ SMDSAbs_GeometryType shape,
+ const bool nullSubMeshRes)
+{
+ if ( !smDS ) return nullSubMeshRes;
+
+ SMDS_ElemIteratorPtr elemIt = smDS->GetElements();
+ while ( elemIt->more() ) {
+ const SMDS_MeshElement* e = elemIt->next();
+ if ( e->GetGeomType() != shape )
+ return false;
+ }
+ return true;
+}
+
+//=======================================================================
+//function : LoadNodeColumns
+//purpose : Load nodes bound to face into a map of node columns
+//=======================================================================
+
+bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap,
+ const TopoDS_Face& theFace,
+ const TopoDS_Edge& theBaseEdge,
+ SMESHDS_Mesh* theMesh,
+ SMESH_ProxyMesh* theProxyMesh)
+{
+ return LoadNodeColumns(theParam2ColumnMap,
+ theFace,
+ std::list<TopoDS_Edge>(1,theBaseEdge),
+ theMesh,
+ theProxyMesh);
+}
+
+//=======================================================================
+//function : LoadNodeColumns
+//purpose : Load nodes bound to face into a map of node columns
+//=======================================================================
+
+bool SMESH_MesherHelper::LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap,
+ const TopoDS_Face& theFace,
+ const std::list<TopoDS_Edge>& theBaseSide,
+ SMESHDS_Mesh* theMesh,
+ SMESH_ProxyMesh* theProxyMesh)
+{
+ // get a right sub-mesh of theFace
+
+ const SMESHDS_SubMesh* faceSubMesh = 0;
+ if ( theProxyMesh )
+ {
+ faceSubMesh = theProxyMesh->GetSubMesh( theFace );
+ if ( !faceSubMesh ||
+ faceSubMesh->NbElements() == 0 ||
+ theProxyMesh->IsTemporary( faceSubMesh->GetElements()->next() ))
+ {
+ // can use a proxy sub-mesh with not temporary elements only
+ faceSubMesh = 0;
+ theProxyMesh = 0;
+ }
+ }
+ if ( !faceSubMesh )
+ faceSubMesh = theMesh->MeshElements( theFace );
+ if ( !faceSubMesh || faceSubMesh->NbElements() == 0 )
+ return false;
+
+ if ( theParam2ColumnMap.empty() )
+ {
+ // get data of edges for normalization of params
+ vector< double > length;
+ double fullLen = 0;
+ list<TopoDS_Edge>::const_iterator edge;
+ {
+ for ( edge = theBaseSide.begin(); edge != theBaseSide.end(); ++edge )
+ {
+ double len = std::max( 1e-10, SMESH_Algo::EdgeLength( *edge ));
+ fullLen += len;
+ length.push_back( len );
+ }
+ }
+
+ // get nodes on theBaseEdge sorted by param on edge and initialize theParam2ColumnMap with them
+ edge = theBaseSide.begin();
+ for ( int iE = 0; edge != theBaseSide.end(); ++edge, ++iE )
+ {
+ map< double, const SMDS_MeshNode*> sortedBaseNN;
+ SMESH_Algo::GetSortedNodesOnEdge( theMesh, *edge,/*noMedium=*/true, sortedBaseNN);
+ if ( sortedBaseNN.empty() ) continue;
+
+ map< double, const SMDS_MeshNode*>::iterator u_n = sortedBaseNN.begin();
+ if ( theProxyMesh ) // from sortedBaseNN remove nodes not shared by faces of faceSubMesh
+ {
+ const SMDS_MeshNode* n1 = (++sortedBaseNN.begin())->second;
+ const SMDS_MeshNode* n2 = (++sortedBaseNN.rbegin())->second;
+ bool allNodesAreProxy = ( n1 != theProxyMesh->GetProxyNode( n1 ) &&
+ n2 != theProxyMesh->GetProxyNode( n2 ));
+ if ( allNodesAreProxy )
+ for ( u_n = sortedBaseNN.begin(); u_n != sortedBaseNN.end(); u_n++ )
+ u_n->second = theProxyMesh->GetProxyNode( u_n->second );
+
+ if ( u_n = sortedBaseNN.begin(), !isNodeInSubMesh( u_n->second, faceSubMesh ))
+ {
+ while ( ++u_n != sortedBaseNN.end() && !isNodeInSubMesh( u_n->second, faceSubMesh ));
+ sortedBaseNN.erase( sortedBaseNN.begin(), u_n );
+ }
+ if ( !sortedBaseNN.empty() )
+ if ( u_n = --sortedBaseNN.end(), !isNodeInSubMesh( u_n->second, faceSubMesh ))
+ {
+ while ( u_n != sortedBaseNN.begin() && !isNodeInSubMesh( (--u_n)->second, faceSubMesh ));
+ sortedBaseNN.erase( ++u_n, sortedBaseNN.end() );
+ }
+ if ( sortedBaseNN.empty() ) continue;
+ }
+
+ double f, l;
+ BRep_Tool::Range( *edge, f, l );
+ if ( edge->Orientation() == TopAbs_REVERSED ) std::swap( f, l );
+ const double coeff = 1. / ( l - f ) * length[iE] / fullLen;
+ const double prevPar = theParam2ColumnMap.empty() ? 0 : theParam2ColumnMap.rbegin()->first;
+ for ( u_n = sortedBaseNN.begin(); u_n != sortedBaseNN.end(); u_n++ )
+ {
+ double par = prevPar + coeff * ( u_n->first - f );
+ TParam2ColumnMap::iterator u2nn =
+ theParam2ColumnMap.insert( theParam2ColumnMap.end(), make_pair( par, TNodeColumn()));
+ u2nn->second.push_back( u_n->second );
+ }
+ }
+ if ( theParam2ColumnMap.size() < 2 )
+ return false;
+ }
+
+ // nb rows of nodes
+ int prevNbRows = theParam2ColumnMap.begin()->second.size(); // current, at least 1 here
+ int expectedNbRows = faceSubMesh->NbElements() / ( theParam2ColumnMap.size()-1 ); // to be added
+
+ // fill theParam2ColumnMap column by column by passing from nodes on
+ // theBaseEdge up via mesh faces on theFace
+
+ TParam2ColumnMap::iterator par_nVec_1, par_nVec_2;
+ par_nVec_2 = theParam2ColumnMap.begin();
+ par_nVec_1 = par_nVec_2++;
+ TIDSortedElemSet emptySet, avoidSet;
+ for ( ; par_nVec_2 != theParam2ColumnMap.end(); ++par_nVec_1, ++par_nVec_2 )
+ {
+ vector<const SMDS_MeshNode*>& nCol1 = par_nVec_1->second;
+ vector<const SMDS_MeshNode*>& nCol2 = par_nVec_2->second;
+ nCol1.resize( prevNbRows + expectedNbRows );
+ nCol2.resize( prevNbRows + expectedNbRows );
+
+ int i1, i2, foundNbRows = 0;
+ const SMDS_MeshNode *n1 = nCol1[ prevNbRows-1 ];
+ const SMDS_MeshNode *n2 = nCol2[ prevNbRows-1 ];
+ // find face sharing node n1 and n2 and belonging to faceSubMesh
+ while ( const SMDS_MeshElement* face =
+ SMESH_MeshAlgos::FindFaceInSet( n1, n2, emptySet, avoidSet, &i1, &i2))
+ {
+ if ( faceSubMesh->Contains( face ))
+ {
+ int nbNodes = face->NbCornerNodes();
+ if ( nbNodes != 4 )
+ return false;
+ if ( foundNbRows + 1 > expectedNbRows )
+ return false;
+ n1 = face->GetNode( (i2+2) % 4 ); // opposite corner of quadrangle face
+ n2 = face->GetNode( (i1+2) % 4 );
+ nCol1[ prevNbRows + foundNbRows] = n1;
+ nCol2[ prevNbRows + foundNbRows] = n2;
+ ++foundNbRows;
+ }
+ avoidSet.insert( face );
+ }
+ if ( foundNbRows != expectedNbRows )
+ return false;
+ avoidSet.clear();
+ }
+ return ( theParam2ColumnMap.size() > 1 &&
+ theParam2ColumnMap.begin()->second.size() == prevNbRows + expectedNbRows );
+}
+
+namespace
+{
+ //================================================================================
+ /*!
+ * \brief Return true if a node is at a corner of a 2D structured mesh of FACE
+ */
+ //================================================================================
+
+ bool isCornerOfStructure( const SMDS_MeshNode* n,
+ const SMESHDS_SubMesh* faceSM,
+ SMESH_MesherHelper& faceAnalyser )
+ {
+ int nbFacesInSM = 0;
+ if ( n ) {
+ SMDS_ElemIteratorPtr fIt = n->GetInverseElementIterator( SMDSAbs_Face );
+ while ( fIt->more() )
+ nbFacesInSM += faceSM->Contains( fIt->next() );
+ }
+ if ( nbFacesInSM == 1 )
+ return true;
+
+ if ( nbFacesInSM == 2 && n->GetPosition()->GetTypeOfPosition() == SMDS_TOP_VERTEX )
+ {
+ return faceAnalyser.IsRealSeam( n->getshapeId() );
+ }
+ return false;
+ }
+}
+
+//=======================================================================
+//function : IsStructured
+//purpose : Return true if 2D mesh on FACE is a structured rectangle
+//=======================================================================
+
+bool SMESH_MesherHelper::IsStructured( SMESH_subMesh* faceSM )
+{
+ SMESHDS_SubMesh* fSM = faceSM->GetSubMeshDS();
+ if ( !fSM || fSM->NbElements() == 0 )
+ return false;
+
+ list< TopoDS_Edge > edges;
+ list< int > nbEdgesInWires;
+ int nbWires = SMESH_Block::GetOrderedEdges( TopoDS::Face( faceSM->GetSubShape() ),
+ edges, nbEdgesInWires );
+ if ( nbWires != 1 /*|| nbEdgesInWires.front() != 4*/ ) // allow composite sides
+ return false;
+
+ // algo: find corners of a structure and then analyze nb of faces and
+ // length of structure sides
+
+ SMESHDS_Mesh* meshDS = faceSM->GetFather()->GetMeshDS();
+ SMESH_MesherHelper faceAnalyser( *faceSM->GetFather() );
+ faceAnalyser.SetSubShape( faceSM->GetSubShape() );
+
+ // rotate edges to get the first node being at corner
+ // (in principle it's not necessary but so far none SALOME algo can make
+ // such a structured mesh that all corner nodes are not on VERTEXes)
+ bool isCorner = false;
+ int nbRemainEdges = nbEdgesInWires.front();
+ do {
+ TopoDS_Vertex V = IthVertex( 0, edges.front() );
+ isCorner = isCornerOfStructure( SMESH_Algo::VertexNode( V, meshDS ),
+ fSM, faceAnalyser);
+ if ( !isCorner ) {
+ edges.splice( edges.end(), edges, edges.begin() );
+ --nbRemainEdges;
+ }
+ }
+ while ( !isCorner && nbRemainEdges > 0 );
+
+ if ( !isCorner )
+ return false;
+
+ // get all nodes from EDGEs
+ list< const SMDS_MeshNode* > nodes;
+ list< TopoDS_Edge >::iterator edge = edges.begin();
+ for ( ; edge != edges.end(); ++edge )
+ {
+ map< double, const SMDS_MeshNode* > u2Nodes;
+ if ( !SMESH_Algo::GetSortedNodesOnEdge( meshDS, *edge,
+ /*skipMedium=*/true, u2Nodes ))
+ return false;
+
+ list< const SMDS_MeshNode* > edgeNodes;
+ map< double, const SMDS_MeshNode* >::iterator u2n = u2Nodes.begin();
+ for ( ; u2n != u2Nodes.end(); ++u2n )
+ edgeNodes.push_back( u2n->second );
+ if ( edge->Orientation() == TopAbs_REVERSED )
+ edgeNodes.reverse();
+
+ if ( !nodes.empty() && nodes.back() == edgeNodes.front() )
+ edgeNodes.pop_front();
+ nodes.splice( nodes.end(), edgeNodes, edgeNodes.begin(), edgeNodes.end() );
+ }
+
+ // get length of structured sides
+ vector<int> nbEdgesInSide;
+ int nbEdges = 0;
+ list< const SMDS_MeshNode* >::iterator n = ++nodes.begin();
+ for ( ; n != nodes.end(); ++n )
+ {
+ ++nbEdges;
+ if ( isCornerOfStructure( *n, fSM, faceAnalyser )) {
+ nbEdgesInSide.push_back( nbEdges );
+ nbEdges = 0;
+ }
+ }
+
+ // checks
+ if ( nbEdgesInSide.size() != 4 )
+ return false;
+ if ( nbEdgesInSide[0] != nbEdgesInSide[2] )
+ return false;
+ if ( nbEdgesInSide[1] != nbEdgesInSide[3] )
+ return false;
+ if ( nbEdgesInSide[0] * nbEdgesInSide[1] != fSM->NbElements() )
+ return false;
+
+ return true;
+}
+
+//=======================================================================
+//function : IsDistorted2D
+//purpose : Return true if 2D mesh on FACE is ditorted
+//=======================================================================
+
+bool SMESH_MesherHelper::IsDistorted2D( SMESH_subMesh* faceSM,
+ bool checkUV)
+{
+ if ( !faceSM || faceSM->GetSubShape().ShapeType() != TopAbs_FACE )
+ return false;
+
+ bool haveBadFaces = false;
+
+ SMESH_MesherHelper helper( *faceSM->GetFather() );
+ helper.SetSubShape( faceSM->GetSubShape() );
+
+ const TopoDS_Face& F = TopoDS::Face( faceSM->GetSubShape() );
+ SMESHDS_SubMesh* smDS = helper.GetMeshDS()->MeshElements( F );
+ if ( !smDS || smDS->NbElements() == 0 ) return false;
+
+ SMDS_ElemIteratorPtr faceIt = smDS->GetElements();
+ double prevArea = 0;
+ vector< const SMDS_MeshNode* > nodes;
+ vector< gp_XY > uv;
+ bool* toCheckUV = checkUV ? & checkUV : 0;
+ while ( faceIt->more() && !haveBadFaces )
+ {
+ const SMDS_MeshElement* face = faceIt->next();
+
+ // get nodes
+ nodes.resize( face->NbCornerNodes() );
+ SMDS_MeshElement::iterator n = face->begin_nodes();
+ for ( size_t i = 0; i < nodes.size(); ++n, ++i )
+ nodes[ i ] = *n;
+
+ // avoid elems on degenarate shapes as UV on them can be wrong
+ if ( helper.HasDegeneratedEdges() )
+ {
+ bool isOnDegen = false;
+ for ( size_t i = 0; ( i < nodes.size() && !isOnDegen ); ++i )
+ isOnDegen = helper.IsDegenShape( nodes[ i ]->getshapeId() );
+ if ( isOnDegen )
+ continue;
+ }
+ // prepare to getting UVs
+ const SMDS_MeshNode* inFaceNode = 0;
+ if ( helper.HasSeam() ) {
+ for ( size_t i = 0; ( i < nodes.size() && !inFaceNode ); ++i )
+ if ( !helper.IsSeamShape( nodes[ i ]->getshapeId() ))
+ inFaceNode = nodes[ i ];
+ if ( !inFaceNode )
+ continue;
+ }
+ // get UVs
+ uv.resize( nodes.size() );
+ for ( size_t i = 0; i < nodes.size(); ++i )
+ uv[ i ] = helper.GetNodeUV( F, nodes[ i ], inFaceNode, toCheckUV );
+
+ // compare orientation of triangles
+ double faceArea = 0;
+ for ( int iT = 0, nbT = nodes.size()-2; iT < nbT; ++iT )
+ {
+ gp_XY v1 = uv[ iT+1 ] - uv[ 0 ];
+ gp_XY v2 = uv[ iT+2 ] - uv[ 0 ];
+ faceArea += v2 ^ v1;
+ }
+ haveBadFaces = ( faceArea * prevArea < 0 );
+ prevArea = faceArea;
+ }
+
+ return haveBadFaces;
+}
+
+//================================================================================
+/*!
+ * \brief Find out elements orientation on a geometrical face
+ * \param theFace - The face correctly oriented in the shape being meshed
+ * \retval bool - true if the face normal and the normal of first element
+ * in the correspoding submesh point in different directions
+ */
+//================================================================================
+
+bool SMESH_MesherHelper::IsReversedSubMesh (const TopoDS_Face& theFace)
+{
+ if ( theFace.IsNull() )
+ return false;
+
+ // find out orientation of a meshed face
+ int faceID = GetMeshDS()->ShapeToIndex( theFace );
+ TopoDS_Shape aMeshedFace = GetMeshDS()->IndexToShape( faceID );
+ bool isReversed = ( theFace.Orientation() != aMeshedFace.Orientation() );
+
+ const SMESHDS_SubMesh * aSubMeshDSFace = GetMeshDS()->MeshElements( faceID );
+ if ( !aSubMeshDSFace )
+ return isReversed;
+
+ // find an element with a good normal
+ gp_Vec Ne;
+ bool normalOK = false;
+ gp_XY uv;
+ SMDS_ElemIteratorPtr iteratorElem = aSubMeshDSFace->GetElements();
+ while ( !normalOK && iteratorElem->more() ) // loop on elements on theFace
+ {
+ const SMDS_MeshElement* elem = iteratorElem->next();
+ if ( elem && elem->NbCornerNodes() > 2 )
+ {
+ SMESH_TNodeXYZ nPnt[3];
+ SMDS_ElemIteratorPtr nodesIt = elem->nodesIterator();
+ int iNodeOnFace = 0, iPosDim = SMDS_TOP_VERTEX;
+ for ( int iN = 0; nodesIt->more() && iN < 3; ++iN) // loop on nodes
+ {
+ nPnt[ iN ] = nodesIt->next();
+ if ( nPnt[ iN ]._node->GetPosition()->GetTypeOfPosition() > iPosDim )
+ {
+ iNodeOnFace = iN;
+ iPosDim = nPnt[ iN ]._node->GetPosition()->GetTypeOfPosition();
+ }
+ }
+ // compute normal
+ gp_Vec v01( nPnt[0], nPnt[1] ), v02( nPnt[0], nPnt[2] );
+ if ( v01.SquareMagnitude() > RealSmall() &&
+ v02.SquareMagnitude() > RealSmall() )
+ {
+ Ne = v01 ^ v02;
+ if (( normalOK = ( Ne.SquareMagnitude() > RealSmall() )))
+ uv = GetNodeUV( theFace, nPnt[iNodeOnFace]._node, 0, &normalOK );
+ }
+ }
+ }
+ if ( !normalOK )
+ return isReversed;
+
+ // face normal at node position
+ TopLoc_Location loc;
+ Handle(Geom_Surface) surf = BRep_Tool::Surface( theFace, loc );
+ // if ( surf.IsNull() || surf->Continuity() < GeomAbs_C1 )
+ // some surfaces not detected as GeomAbs_C1 are nevertheless correct for meshing
+ if ( surf.IsNull() || surf->Continuity() < GeomAbs_C0 )
+ {
+ if (!surf.IsNull())
+ MESSAGE("surf->Continuity() < GeomAbs_C1 " << (surf->Continuity() < GeomAbs_C1));
+ return isReversed;
+ }
+ gp_Vec d1u, d1v; gp_Pnt p;
+ surf->D1( uv.X(), uv.Y(), p, d1u, d1v );
+ gp_Vec Nf = (d1u ^ d1v).Transformed( loc );
+
+ if ( theFace.Orientation() == TopAbs_REVERSED )
+ Nf.Reverse();
+
+ return Ne * Nf < 0.;
+}
+
+//=======================================================================
+//function : Count
+//purpose : Count nb of sub-shapes
+//=======================================================================
+
+int SMESH_MesherHelper::Count(const TopoDS_Shape& shape,
+ const TopAbs_ShapeEnum type,
+ const bool ignoreSame)
+{
+ if ( ignoreSame ) {
+ TopTools_IndexedMapOfShape map;
+ TopExp::MapShapes( shape, type, map );
+ return map.Extent();
+ }
+ else {
+ int nb = 0;
+ for ( TopExp_Explorer exp( shape, type ); exp.More(); exp.Next() )
+ ++nb;
+ return nb;
+ }
+}
+
+//=======================================================================
+//function : NbAncestors
+//purpose : Return number of unique ancestors of the shape
+//=======================================================================
+
+int SMESH_MesherHelper::NbAncestors(const TopoDS_Shape& shape,
+ const SMESH_Mesh& mesh,
+ TopAbs_ShapeEnum ancestorType/*=TopAbs_SHAPE*/)
+{
+ TopTools_MapOfShape ancestors;
+ TopTools_ListIteratorOfListOfShape ansIt( mesh.GetAncestors(shape) );
+ for ( ; ansIt.More(); ansIt.Next() ) {
+ if ( ancestorType == TopAbs_SHAPE || ansIt.Value().ShapeType() == ancestorType )
+ ancestors.Add( ansIt.Value() );
+ }
+ return ancestors.Extent();
+}
+
+//=======================================================================
+//function : GetSubShapeOri
+//purpose : Return orientation of sub-shape in the main shape
+//=======================================================================
+
+TopAbs_Orientation SMESH_MesherHelper::GetSubShapeOri(const TopoDS_Shape& shape,
+ const TopoDS_Shape& subShape)
+{
+ TopAbs_Orientation ori = TopAbs_Orientation(-1);
+ if ( !shape.IsNull() && !subShape.IsNull() )
+ {
+ TopExp_Explorer e( shape, subShape.ShapeType() );
+ if ( shape.Orientation() >= TopAbs_INTERNAL ) // TopAbs_INTERNAL or TopAbs_EXTERNAL
+ e.Init( shape.Oriented(TopAbs_FORWARD), subShape.ShapeType() );
+ for ( ; e.More(); e.Next())
+ if ( subShape.IsSame( e.Current() ))
+ break;
+ if ( e.More() )
+ ori = e.Current().Orientation();
+ }
+ return ori;
+}
+
+//=======================================================================
+//function : IsSubShape
+//purpose :
+//=======================================================================
+
+bool SMESH_MesherHelper::IsSubShape( const TopoDS_Shape& shape,
+ const TopoDS_Shape& mainShape )
+{
+ if ( !shape.IsNull() && !mainShape.IsNull() )
+ {
+ for ( TopExp_Explorer exp( mainShape, shape.ShapeType());
+ exp.More();
+ exp.Next() )
+ if ( shape.IsSame( exp.Current() ))
+ return true;
+ }
+ SCRUTE((shape.IsNull()));
+ SCRUTE((mainShape.IsNull()));
+ return false;
+}
+
+//=======================================================================
+//function : IsSubShape
+//purpose :
+//=======================================================================
+
+bool SMESH_MesherHelper::IsSubShape( const TopoDS_Shape& shape, SMESH_Mesh* aMesh )
+{
+ if ( shape.IsNull() || !aMesh )
+ return false;
+ return
+ aMesh->GetMeshDS()->ShapeToIndex( shape ) ||
+ // PAL16202
+ (shape.ShapeType() == TopAbs_COMPOUND && aMesh->GetMeshDS()->IsGroupOfSubShapes( shape ));
+}
+
+//=======================================================================
+//function : IsBlock
+//purpose :
+//=======================================================================
+
+bool SMESH_MesherHelper::IsBlock( const TopoDS_Shape& shape )
+{
+ if ( shape.IsNull() )
+ return false;
+
+ TopoDS_Shell shell;
+ TopExp_Explorer exp( shape, TopAbs_SHELL );
+ if ( !exp.More() ) return false;
+ shell = TopoDS::Shell( exp.Current() );
+ if ( exp.Next(), exp.More() ) return false;
+
+ TopoDS_Vertex v;
+ TopTools_IndexedMapOfOrientedShape map;
+ return SMESH_Block::FindBlockShapes( shell, v, v, map );
+}
+
+
+//================================================================================
+/*!
+ * \brief Return maximal tolerance of shape
+ */
+//================================================================================
+
+double SMESH_MesherHelper::MaxTolerance( const TopoDS_Shape& shape )
+{
+ double tol = Precision::Confusion();
+ TopExp_Explorer exp;
+ for ( exp.Init( shape, TopAbs_FACE ); exp.More(); exp.Next() )
+ tol = Max( tol, BRep_Tool::Tolerance( TopoDS::Face( exp.Current())));
+ for ( exp.Init( shape, TopAbs_EDGE ); exp.More(); exp.Next() )
+ tol = Max( tol, BRep_Tool::Tolerance( TopoDS::Edge( exp.Current())));
+ for ( exp.Init( shape, TopAbs_VERTEX ); exp.More(); exp.Next() )
+ tol = Max( tol, BRep_Tool::Tolerance( TopoDS::Vertex( exp.Current())));
+
+ return tol;
+}
+
+//================================================================================
+/*!
+ * \brief Return an angle between two EDGEs sharing a common VERTEX with reference
+ * of the FACE normal
+ * \return double - the angle (between -Pi and Pi), negative if the angle is concave,
+ * 1e100 in case of failure
+ * \waring Care about order of the EDGEs and their orientation to be as they are
+ * within the FACE! Don't pass degenerated EDGEs neither!
+ */
+//================================================================================
+
+double SMESH_MesherHelper::GetAngle( const TopoDS_Edge & theE1,
+ const TopoDS_Edge & theE2,
+ const TopoDS_Face & theFace,
+ const TopoDS_Vertex & theCommonV,
+ gp_Vec* theFaceNormal)
+{
+ double angle = 1e100;
+ try
+ {
+ double f,l;
+ Handle(Geom_Curve) c1 = BRep_Tool::Curve( theE1, f,l );
+ Handle(Geom_Curve) c2 = BRep_Tool::Curve( theE2, f,l );
+ Handle(Geom2d_Curve) c2d1 = BRep_Tool::CurveOnSurface( theE1, theFace, f,l );
+ Handle(Geom_Surface) surf = BRep_Tool::Surface( theFace );
+ double p1 = BRep_Tool::Parameter( theCommonV, theE1 );
+ double p2 = BRep_Tool::Parameter( theCommonV, theE2 );
+ if ( c1.IsNull() || c2.IsNull() )
+ return angle;
+ gp_XY uv = c2d1->Value( p1 ).XY();
+ gp_Vec du, dv; gp_Pnt p;
+ surf->D1( uv.X(), uv.Y(), p, du, dv );
+ gp_Vec vec1, vec2, vecRef = du ^ dv;
+ int nbLoops = 0;
+ double p1tmp = p1;
+ while ( vecRef.SquareMagnitude() < 1e-25 )
+ {
+ double dp = ( l - f ) / 1000.;
+ p1tmp += dp * (( Abs( p1 - f ) > Abs( p1 - l )) ? -1. : +1.);
+ uv = c2d1->Value( p1tmp ).XY();
+ surf->D1( uv.X(), uv.Y(), p, du, dv );
+ vecRef = du ^ dv;
+ if ( ++nbLoops > 10 )
+ {
+#ifdef _DEBUG_
+ cout << "SMESH_MesherHelper::GetAngle(): Captured in a sigularity" << endl;
+#endif
+ return angle;
+ }
+ }
+ if ( theFace.Orientation() == TopAbs_REVERSED )
+ vecRef.Reverse();
+ if ( theFaceNormal ) *theFaceNormal = vecRef;
+
+ c1->D1( p1, p, vec1 );
+ c2->D1( p2, p, vec2 );
+ // TopoDS_Face F = theFace;
+ // if ( F.Orientation() == TopAbs_INTERNAL )
+ // F.Orientation( TopAbs_FORWARD );
+ if ( theE1.Orientation() /*GetSubShapeOri( F, theE1 )*/ == TopAbs_REVERSED )
+ vec1.Reverse();
+ if ( theE2.Orientation() /*GetSubShapeOri( F, theE2 )*/ == TopAbs_REVERSED )
+ vec2.Reverse();
+ angle = vec1.AngleWithRef( vec2, vecRef );
+
+ if ( Abs ( angle ) >= 0.99 * M_PI )
+ {
+ BRep_Tool::Range( theE1, f, l );
+ p1 += 1e-7 * ( p1-f < l-p1 ? +1. : -1. );
+ c1->D1( p1, p, vec1 );
+ if ( theE1.Orientation() == TopAbs_REVERSED )
+ vec1.Reverse();
+ BRep_Tool::Range( theE2, f, l );
+ p2 += 1e-7 * ( p2-f < l-p2 ? +1. : -1. );
+ c2->D1( p2, p, vec2 );
+ if ( theE2.Orientation() == TopAbs_REVERSED )
+ vec2.Reverse();
+ angle = vec1.AngleWithRef( vec2, vecRef );
+ }
+ }
+ catch (...)
+ {
+ }
+ return angle;
+}
+
+//================================================================================
+/*!
+ * \brief Check if the first and last vertices of an edge are the same
+ * \param anEdge - the edge to check
+ * \retval bool - true if same
+ */
+//================================================================================
+
+bool SMESH_MesherHelper::IsClosedEdge( const TopoDS_Edge& anEdge )
+{
+ if ( anEdge.Orientation() >= TopAbs_INTERNAL )
+ return IsClosedEdge( TopoDS::Edge( anEdge.Oriented( TopAbs_FORWARD )));
+ return TopExp::FirstVertex( anEdge ).IsSame( TopExp::LastVertex( anEdge ));
+}
+
+//================================================================================
+/*!
+ * \brief Wrapper over TopExp::FirstVertex() and TopExp::LastVertex() fixing them
+ * in the case of INTERNAL edge
+ */
+//================================================================================
+
+TopoDS_Vertex SMESH_MesherHelper::IthVertex( const bool is2nd,
+ TopoDS_Edge anEdge,
+ const bool CumOri )
+{
+ if ( anEdge.Orientation() >= TopAbs_INTERNAL )
+ anEdge.Orientation( TopAbs_FORWARD );
+
+ const TopAbs_Orientation tgtOri = is2nd ? TopAbs_REVERSED : TopAbs_FORWARD;
+ TopoDS_Iterator vIt( anEdge, CumOri );
+ while ( vIt.More() && vIt.Value().Orientation() != tgtOri )
+ vIt.Next();
+
+ return ( vIt.More() ? TopoDS::Vertex(vIt.Value()) : TopoDS_Vertex() );
+}
+
+//================================================================================
+/*!
+ * \brief Return type of shape contained in a group
+ * \param group - a shape of type TopAbs_COMPOUND
+ * \param avoidCompound - not to return TopAbs_COMPOUND
+ */
+//================================================================================
+
+TopAbs_ShapeEnum SMESH_MesherHelper::GetGroupType(const TopoDS_Shape& group,
+ const bool avoidCompound)
+{
+ if ( !group.IsNull() )
+ {
+ if ( group.ShapeType() != TopAbs_COMPOUND )
+ return group.ShapeType();
+
+ // iterate on a compound
+ TopoDS_Iterator it( group );
+ if ( it.More() )
+ return avoidCompound ? GetGroupType( it.Value() ) : it.Value().ShapeType();
+ }
+ return TopAbs_SHAPE;
+}
+
+//=======================================================================
+//function : IsQuadraticMesh
+//purpose : Check mesh without geometry for: if all elements on this shape are quadratic,
+// quadratic elements will be created.
+// Used then generated 3D mesh without geometry.
+//=======================================================================
+
+SMESH_MesherHelper:: MType SMESH_MesherHelper::IsQuadraticMesh()
+{
+ int NbAllEdgsAndFaces=0;
+ int NbQuadFacesAndEdgs=0;
+ int NbFacesAndEdges=0;
+ //All faces and edges
+ NbAllEdgsAndFaces = myMesh->NbEdges() + myMesh->NbFaces();
+ if ( NbAllEdgsAndFaces == 0 )
+ return SMESH_MesherHelper::LINEAR;
+
+ //Quadratic faces and edges
+ NbQuadFacesAndEdgs = myMesh->NbEdges(ORDER_QUADRATIC) + myMesh->NbFaces(ORDER_QUADRATIC);
+
+ //Linear faces and edges
+ NbFacesAndEdges = myMesh->NbEdges(ORDER_LINEAR) + myMesh->NbFaces(ORDER_LINEAR);
+
+ if (NbAllEdgsAndFaces == NbQuadFacesAndEdgs) {
+ //Quadratic mesh
+ return SMESH_MesherHelper::QUADRATIC;
+ }
+ else if (NbAllEdgsAndFaces == NbFacesAndEdges) {
+ //Linear mesh
+ return SMESH_MesherHelper::LINEAR;
+ }
+ else
+ //Mesh with both type of elements
+ return SMESH_MesherHelper::COMP;
+}
+
+//=======================================================================
+//function : GetOtherParam
+//purpose : Return an alternative parameter for a node on seam
+//=======================================================================
+
+double SMESH_MesherHelper::GetOtherParam(const double param) const
+{
+ int i = myParIndex & U_periodic ? 0 : 1;
+ return fabs(param-myPar1[i]) < fabs(param-myPar2[i]) ? myPar2[i] : myPar1[i];
+}
+
+namespace {
+
+ //=======================================================================
+ /*!
+ * \brief Iterator on ancestors of the given type
+ */
+ //=======================================================================
+
+ struct TAncestorsIterator : public SMDS_Iterator<const TopoDS_Shape*>
+ {
+ TopTools_ListIteratorOfListOfShape _ancIter;
+ TopAbs_ShapeEnum _type;
+ TopTools_MapOfShape _encountered;
+ TAncestorsIterator( const TopTools_ListOfShape& ancestors, TopAbs_ShapeEnum type)
+ : _ancIter( ancestors ), _type( type )
+ {
+ if ( _ancIter.More() ) {
+ if ( _ancIter.Value().ShapeType() != _type ) next();
+ else _encountered.Add( _ancIter.Value() );
+ }
+ }
+ virtual bool more()
+ {
+ return _ancIter.More();
+ }
+ virtual const TopoDS_Shape* next()
+ {
+ const TopoDS_Shape* s = _ancIter.More() ? & _ancIter.Value() : 0;
+ if ( _ancIter.More() )
+ for ( _ancIter.Next(); _ancIter.More(); _ancIter.Next())
+ if ( _ancIter.Value().ShapeType() == _type && _encountered.Add( _ancIter.Value() ))
+ break;
+ return s;
+ }
+ };
+
+} // namespace
+
+//=======================================================================
+/*!
+ * \brief Return iterator on ancestors of the given type
+ */
+//=======================================================================
+
+PShapeIteratorPtr SMESH_MesherHelper::GetAncestors(const TopoDS_Shape& shape,
+ const SMESH_Mesh& mesh,
+ TopAbs_ShapeEnum ancestorType)
+{
+ return PShapeIteratorPtr( new TAncestorsIterator( mesh.GetAncestors(shape), ancestorType));
+}
+
+//=======================================================================
+//function : GetCommonAncestor
+//purpose : Find a common ancestors of two shapes of the given type
+//=======================================================================
+
+TopoDS_Shape SMESH_MesherHelper::GetCommonAncestor(const TopoDS_Shape& shape1,
+ const TopoDS_Shape& shape2,
+ const SMESH_Mesh& mesh,
+ TopAbs_ShapeEnum ancestorType)
+{
+ TopoDS_Shape commonAnc;
+ if ( !shape1.IsNull() && !shape2.IsNull() )
+ {
+ PShapeIteratorPtr ancIt = GetAncestors( shape1, mesh, ancestorType );
+ while ( const TopoDS_Shape* anc = ancIt->next() )
+ if ( IsSubShape( shape2, *anc ))
+ {
+ commonAnc = *anc;
+ break;
+ }
+ }
+ return commonAnc;
+}
+
+//#include <Perf_Meter.hxx>
+
+//=======================================================================
+namespace { // Structures used by FixQuadraticElements()
+//=======================================================================
+
+#define __DMP__(txt) \
+ // cout << txt
+#define MSG(txt) __DMP__(txt<<endl)
+#define MSGBEG(txt) __DMP__(txt)
+
+ //const double straightTol2 = 1e-33; // to detect straing links
+ bool isStraightLink(double linkLen2, double middleNodeMove2)
+ {
+ // straight if <node move> < 1/15 * <link length>
+ return middleNodeMove2 < 1/15./15. * linkLen2;
+ }
+
+ struct QFace;
+ // ---------------------------------------
+ /*!
+ * \brief Quadratic link knowing its faces
+ */
+ struct QLink: public SMESH_TLink
+ {
+ const SMDS_MeshNode* _mediumNode;
+ mutable vector<const QFace* > _faces;
+ mutable gp_Vec _nodeMove;
+ mutable int _nbMoves;
+
+ QLink(const SMDS_MeshNode* n1, const SMDS_MeshNode* n2, const SMDS_MeshNode* nm):
+ SMESH_TLink( n1,n2 ), _mediumNode(nm), _nodeMove(0,0,0), _nbMoves(0) {
+ _faces.reserve(4);
+ //if ( MediumPos() != SMDS_TOP_3DSPACE )
+ _nodeMove = MediumPnt() - MiddlePnt();
+ }
+ void SetContinuesFaces() const;
+ const QFace* GetContinuesFace( const QFace* face ) const;
+ bool OnBoundary() const;
+ gp_XYZ MiddlePnt() const { return ( XYZ( node1() ) + XYZ( node2() )) / 2.; }
+ gp_XYZ MediumPnt() const { return XYZ( _mediumNode ); }
+
+ SMDS_TypeOfPosition MediumPos() const
+ { return _mediumNode->GetPosition()->GetTypeOfPosition(); }
+ SMDS_TypeOfPosition EndPos(bool isSecond) const
+ { return (isSecond ? node2() : node1())->GetPosition()->GetTypeOfPosition(); }
+ const SMDS_MeshNode* EndPosNode(SMDS_TypeOfPosition pos) const
+ { return EndPos(0) == pos ? node1() : EndPos(1) == pos ? node2() : 0; }
+
+ void Move(const gp_Vec& move, bool sum=false) const
+ { _nodeMove += move; _nbMoves += sum ? (_nbMoves==0) : 1; }
+ gp_XYZ Move() const { return _nodeMove.XYZ() / _nbMoves; }
+ bool IsMoved() const { return (_nbMoves > 0 /*&& !IsStraight()*/); }
+ bool IsStraight() const
+ { return isStraightLink( (XYZ(node1())-XYZ(node2())).SquareModulus(),
+ _nodeMove.SquareMagnitude());
+ }
+ bool operator<(const QLink& other) const {
+ return (node1()->GetID() == other.node1()->GetID() ?
+ node2()->GetID() < other.node2()->GetID() :
+ node1()->GetID() < other.node1()->GetID());
+ }
+// struct PtrComparator {
+// bool operator() (const QLink* l1, const QLink* l2 ) const { return *l1 < *l2; }
+// };
+ };
+ // ---------------------------------------------------------
+ /*!
+ * \brief Link in the chain of links; it connects two faces
+ */
+ struct TChainLink
+ {
+ const QLink* _qlink;
+ mutable const QFace* _qfaces[2];
+
+ TChainLink(const QLink* qlink=0):_qlink(qlink) {
+ _qfaces[0] = _qfaces[1] = 0;
+ }
+ void SetFace(const QFace* face) const { int iF = _qfaces[0] ? 1 : 0; _qfaces[iF]=face; }
+
+ bool IsBoundary() const { return !_qfaces[1]; }
+
+ void RemoveFace( const QFace* face ) const
+ { _qfaces[(face == _qfaces[1])] = 0; if (!_qfaces[0]) std::swap(_qfaces[0],_qfaces[1]); }
+
+ const QFace* NextFace( const QFace* f ) const
+ { return _qfaces[0]==f ? _qfaces[1] : _qfaces[0]; }
+
+ const SMDS_MeshNode* NextNode( const SMDS_MeshNode* n ) const
+ { return n == _qlink->node1() ? _qlink->node2() : _qlink->node1(); }
+
+ bool operator<(const TChainLink& other) const { return *_qlink < *other._qlink; }
+
+ operator bool() const { return (_qlink); }
+
+ const QLink* operator->() const { return _qlink; }
+
+ gp_Vec Normal() const;
+
+ bool IsStraight() const;
+ };
+ // --------------------------------------------------------------------
+ typedef list< TChainLink > TChain;
+ typedef set < TChainLink > TLinkSet;
+ typedef TLinkSet::const_iterator TLinkInSet;
+
+ const int theFirstStep = 5;
+
+ enum { ERR_OK, ERR_TRI, ERR_PRISM, ERR_UNKNOWN }; // errors of QFace::GetLinkChain()
+ // --------------------------------------------------------------------
+ /*!
+ * \brief Quadratic face shared by two volumes and bound by QLinks
+ */
+ struct QFace: public TIDSortedNodeSet
+ {
+ mutable const SMDS_MeshElement* _volumes[2];
+ mutable vector< const QLink* > _sides;
+ mutable bool _sideIsAdded[4]; // added in chain of links
+ gp_Vec _normal;
+#ifdef _DEBUG_
+ mutable const SMDS_MeshElement* _face;
+#endif
+
+ QFace( const vector< const QLink*>& links, const SMDS_MeshElement* face=0 );
+
+ void SetVolume(const SMDS_MeshElement* v) const { _volumes[ _volumes[0] ? 1 : 0 ] = v; }
+
+ int NbVolumes() const { return !_volumes[0] ? 0 : !_volumes[1] ? 1 : 2; }
+
+ void AddSelfToLinks() const {
+ for ( int i = 0; i < _sides.size(); ++i )
+ _sides[i]->_faces.push_back( this );
+ }
+ int LinkIndex( const QLink* side ) const {
+ for (int i=0; i<_sides.size(); ++i ) if ( _sides[i] == side ) return i;
+ return -1;
+ }
+ bool GetLinkChain( int iSide, TChain& chain, SMDS_TypeOfPosition pos, int& err) const;
+
+ bool GetLinkChain( TChainLink& link, TChain& chain, SMDS_TypeOfPosition pos, int& err) const
+ {
+ int i = LinkIndex( link._qlink );
+ if ( i < 0 ) return true;
+ _sideIsAdded[i] = true;
+ link.SetFace( this );
+ // continue from opposite link
+ return GetLinkChain( (i+2)%_sides.size(), chain, pos, err );
+ }
+ bool IsBoundary() const { return !_volumes[1]; }
+
+ bool Contains( const SMDS_MeshNode* node ) const { return count(node); }
+
+ bool IsSpoiled(const QLink* bentLink ) const;
+
+ TLinkInSet GetBoundaryLink( const TLinkSet& links,
+ const TChainLink& avoidLink,
+ TLinkInSet * notBoundaryLink = 0,
+ const SMDS_MeshNode* nodeToContain = 0,
+ bool * isAdjacentUsed = 0,
+ int nbRecursionsLeft = -1) const;
+
+ TLinkInSet GetLinkByNode( const TLinkSet& links,
+ const TChainLink& avoidLink,
+ const SMDS_MeshNode* nodeToContain) const;
+
+ const SMDS_MeshNode* GetNodeInFace() const {
+ for ( int iL = 0; iL < _sides.size(); ++iL )
+ if ( _sides[iL]->MediumPos() == SMDS_TOP_FACE ) return _sides[iL]->_mediumNode;
+ return 0;
+ }
+
+ gp_Vec LinkNorm(const int i, SMESH_MesherHelper* theFaceHelper=0) const;
+
+ double MoveByBoundary( const TChainLink& theLink,
+ const gp_Vec& theRefVec,
+ const TLinkSet& theLinks,
+ SMESH_MesherHelper* theFaceHelper=0,
+ const double thePrevLen=0,
+ const int theStep=theFirstStep,
+ gp_Vec* theLinkNorm=0,
+ double theSign=1.0) const;
+ };
+
+ //================================================================================
+ /*!
+ * \brief Dump QLink and QFace
+ */
+ ostream& operator << (ostream& out, const QLink& l)
+ {
+ out <<"QLink nodes: "
+ << l.node1()->GetID() << " - "
+ << l._mediumNode->GetID() << " - "
+ << l.node2()->GetID() << endl;
+ return out;
+ }
+ ostream& operator << (ostream& out, const QFace& f)
+ {
+ out <<"QFace nodes: "/*<< &f << " "*/;
+ for ( TIDSortedNodeSet::const_iterator n = f.begin(); n != f.end(); ++n )
+ out << (*n)->GetID() << " ";
+ out << " \tvolumes: "
+ << (f._volumes[0] ? f._volumes[0]->GetID() : 0) << " "
+ << (f._volumes[1] ? f._volumes[1]->GetID() : 0);
+ out << " \tNormal: "<< f._normal.X() <<", "<<f._normal.Y() <<", "<<f._normal.Z() << endl;
+ return out;
+ }
+
+ //================================================================================
+ /*!
+ * \brief Construct QFace from QLinks
+ */
+ //================================================================================
+
+ QFace::QFace( const vector< const QLink*>& links, const SMDS_MeshElement* face )
+ {
+ _volumes[0] = _volumes[1] = 0;
+ _sides = links;
+ _sideIsAdded[0]=_sideIsAdded[1]=_sideIsAdded[2]=_sideIsAdded[3]=false;
+ _normal.SetCoord(0,0,0);
+ for ( int i = 1; i < _sides.size(); ++i ) {
+ const QLink *l1 = _sides[i-1], *l2 = _sides[i];
+ insert( l1->node1() ); insert( l1->node2() );
+ // compute normal
+ gp_Vec v1( XYZ( l1->node2()), XYZ( l1->node1()));
+ gp_Vec v2( XYZ( l2->node1()), XYZ( l2->node2()));
+ if ( l1->node1() != l2->node1() && l1->node2() != l2->node2() )
+ v1.Reverse();
+ _normal += v1 ^ v2;
+ }
+ double normSqSize = _normal.SquareMagnitude();
+ if ( normSqSize > numeric_limits<double>::min() )
+ _normal /= sqrt( normSqSize );
+ else
+ _normal.SetCoord(1e-33,0,0);
+
+#ifdef _DEBUG_
+ _face = face;
+#endif
+ }
+ //================================================================================
+ /*!
+ * \brief Make up a chain of links
+ * \param iSide - link to add first
+ * \param chain - chain to fill in
+ * \param pos - postion of medium nodes the links should have
+ * \param error - out, specifies what is wrong
+ * \retval bool - false if valid chain can't be built; "valid" means that links
+ * of the chain belongs to rectangles bounding hexahedrons
+ */
+ //================================================================================
+
+ bool QFace::GetLinkChain( int iSide, TChain& chain, SMDS_TypeOfPosition pos, int& error) const
+ {
+ if ( iSide >= _sides.size() ) // wrong argument iSide
+ return false;
+ if ( _sideIsAdded[ iSide ]) // already in chain
+ return true;
+
+ if ( _sides.size() != 4 ) { // triangle - visit all my continous faces
+ MSGBEG( *this );
+ TLinkSet links;
+ list< const QFace* > faces( 1, this );
+ while ( !faces.empty() ) {
+ const QFace* face = faces.front();
+ for ( int i = 0; i < face->_sides.size(); ++i ) {
+ if ( !face->_sideIsAdded[i] && face->_sides[i] ) {
+ face->_sideIsAdded[i] = true;
+ // find a face side in the chain
+ TLinkInSet chLink = links.insert( TChainLink(face->_sides[i])).first;
+// TChain::iterator chLink = chain.begin();
+// for ( ; chLink != chain.end(); ++chLink )
+// if ( chLink->_qlink == face->_sides[i] )
+// break;
+// if ( chLink == chain.end() )
+// chLink = chain.insert( chain.begin(), TChainLink(face->_sides[i]));
+ // add a face to a chained link and put a continues face in the queue
+ chLink->SetFace( face );
+ if ( face->_sides[i]->MediumPos() == pos )
+ if ( const QFace* contFace = face->_sides[i]->GetContinuesFace( face ))
+ if ( contFace->_sides.size() == 3 )
+ faces.push_back( contFace );
+ }
+ }
+ faces.pop_front();
+ }
+ if ( error < ERR_TRI )
+ error = ERR_TRI;
+ chain.insert( chain.end(), links.begin(),links.end() );
+ return false;
+ }
+ _sideIsAdded[iSide] = true; // not to add this link to chain again
+ const QLink* link = _sides[iSide];
+ if ( !link)
+ return true;
+
+ // add link into chain
+ TChain::iterator chLink = chain.insert( chain.begin(), TChainLink(link));
+ chLink->SetFace( this );
+ MSGBEG( *this );
+
+ // propagate from a quadrangle to neighbour faces
+ if ( link->MediumPos() >= pos ) {
+ int nbLinkFaces = link->_faces.size();
+ if ( nbLinkFaces == 4 || (/*nbLinkFaces < 4 && */link->OnBoundary())) {
+ // hexahedral mesh or boundary quadrangles - goto a continous face
+ if ( const QFace* f = link->GetContinuesFace( this ))
+ if ( f->_sides.size() == 4 )
+ return f->GetLinkChain( *chLink, chain, pos, error );
+ }
+ else {
+ TChainLink chLink(link); // side face of prismatic mesh - visit all faces of iSide
+ for ( int i = 0; i < nbLinkFaces; ++i )
+ if ( link->_faces[i] )
+ link->_faces[i]->GetLinkChain( chLink, chain, pos, error );
+ if ( error < ERR_PRISM )
+ error = ERR_PRISM;
+ return false;
+ }
+ }
+ return true;
+ }
+
+ //================================================================================
+ /*!
+ * \brief Return a boundary link of the triangle face
+ * \param links - set of all links
+ * \param avoidLink - link not to return
+ * \param notBoundaryLink - out, neither the returned link nor avoidLink
+ * \param nodeToContain - node the returned link must contain; if provided, search
+ * also performed on adjacent faces
+ * \param isAdjacentUsed - returns true if link is found in adjacent faces
+ * \param nbRecursionsLeft - to limit recursion
+ */
+ //================================================================================
+
+ TLinkInSet QFace::GetBoundaryLink( const TLinkSet& links,
+ const TChainLink& avoidLink,
+ TLinkInSet * notBoundaryLink,
+ const SMDS_MeshNode* nodeToContain,
+ bool * isAdjacentUsed,
+ int nbRecursionsLeft) const
+ {
+ TLinkInSet linksEnd = links.end(), boundaryLink = linksEnd;
+
+ typedef list< pair< const QFace*, TLinkInSet > > TFaceLinkList;
+ TFaceLinkList adjacentFaces;
+
+ for ( int iL = 0; iL < _sides.size(); ++iL )
+ {
+ if ( avoidLink._qlink == _sides[iL] )
+ continue;
+ TLinkInSet link = links.find( _sides[iL] );
+ if ( link == linksEnd ) continue;
+ if ( (*link)->MediumPos() > SMDS_TOP_FACE )
+ continue; // We work on faces here, don't go inside a solid
+
+ // check link
+ if ( link->IsBoundary() ) {
+ if ( !nodeToContain ||
+ (*link)->node1() == nodeToContain ||
+ (*link)->node2() == nodeToContain )
+ {
+ boundaryLink = link;
+ if ( !notBoundaryLink ) break;
+ }
+ }
+ else if ( notBoundaryLink ) {
+ *notBoundaryLink = link;
+ if ( boundaryLink != linksEnd ) break;
+ }
+
+ if ( boundaryLink == linksEnd && nodeToContain ) // collect adjacent faces
+ if ( const QFace* adj = link->NextFace( this ))
+ if ( adj->Contains( nodeToContain ))
+ adjacentFaces.push_back( make_pair( adj, link ));
+ }
+
+ if ( isAdjacentUsed ) *isAdjacentUsed = false;
+ if ( boundaryLink == linksEnd && nodeToContain && nbRecursionsLeft) // check adjacent faces
+ {
+ if ( nbRecursionsLeft < 0 )
+ nbRecursionsLeft = nodeToContain->NbInverseElements();
+ TFaceLinkList::iterator adj = adjacentFaces.begin();
+ for ( ; boundaryLink == linksEnd && adj != adjacentFaces.end(); ++adj )
+ boundaryLink = adj->first->GetBoundaryLink( links, *(adj->second), 0, nodeToContain,
+ isAdjacentUsed, nbRecursionsLeft-1);
+ if ( isAdjacentUsed ) *isAdjacentUsed = true;
+ }
+ return boundaryLink;
+ }
+ //================================================================================
+ /*!
+ * \brief Return a link ending at the given node but not avoidLink
+ */
+ //================================================================================
+
+ TLinkInSet QFace::GetLinkByNode( const TLinkSet& links,
+ const TChainLink& avoidLink,
+ const SMDS_MeshNode* nodeToContain) const
+ {
+ for ( int i = 0; i < _sides.size(); ++i )
+ if ( avoidLink._qlink != _sides[i] &&
+ (_sides[i]->node1() == nodeToContain || _sides[i]->node2() == nodeToContain ))
+ return links.find( _sides[ i ]);
+ return links.end();
+ }
+
+ //================================================================================
+ /*!
+ * \brief Return normal to the i-th side pointing outside the face
+ */
+ //================================================================================
+
+ gp_Vec QFace::LinkNorm(const int i, SMESH_MesherHelper* /*uvHelper*/) const
+ {
+ gp_Vec norm = _normal ^ gp_Vec( XYZ(_sides[i]->node1()), XYZ(_sides[i]->node2()));
+ gp_XYZ pIn = ( _sides[ (i+1)%3 ]->MiddlePnt() +
+ _sides[ (i+2)%3 ]->MiddlePnt() ) / 2.;
+ gp_Vec vecOut = ( _sides[i]->MiddlePnt() - pIn );
+
+ if ( norm * vecOut < 0 )
+ norm.Reverse();
+ double mag2 = norm.SquareMagnitude();
+ if ( mag2 > numeric_limits<double>::min() )
+ norm /= sqrt( mag2 );
+ return norm;
+ }
+ //================================================================================
+ /*!
+ * \brief Move medium node of theLink according to its distance from boundary
+ * \param theLink - link to fix
+ * \param theRefVec - movement of boundary
+ * \param theLinks - all adjacent links of continous triangles
+ * \param theFaceHelper - helper is not used so far
+ * \param thePrevLen - distance from the boundary
+ * \param theStep - number of steps till movement propagation limit
+ * \param theLinkNorm - out normal to theLink
+ * \param theSign - 1 or -1 depending on movement of boundary
+ * \retval double - distance from boundary to propagation limit or other boundary
+ */
+ //================================================================================
+
+ double QFace::MoveByBoundary( const TChainLink& theLink,
+ const gp_Vec& theRefVec,
+ const TLinkSet& theLinks,
+ SMESH_MesherHelper* theFaceHelper,
+ const double thePrevLen,
+ const int theStep,
+ gp_Vec* theLinkNorm,
+ double theSign) const
+ {
+ if ( !theStep )
+ return thePrevLen; // propagation limit reached
+
+ int iL; // index of theLink
+ for ( iL = 0; iL < _sides.size(); ++iL )
+ if ( theLink._qlink == _sides[ iL ])
+ break;
+
+ MSG(string(theStep,'.')<<" Ref( "<<theRefVec.X()<<","<<theRefVec.Y()<<","<<theRefVec.Z()<<" )"
+ <<" thePrevLen " << thePrevLen);
+ MSG(string(theStep,'.')<<" "<<*theLink._qlink);
+
+ gp_Vec linkNorm = -LinkNorm( iL/*, theFaceHelper*/ ); // normal to theLink
+ double refProj = theRefVec * linkNorm; // project movement vector to normal of theLink
+ if ( theStep == theFirstStep )
+ theSign = refProj < 0. ? -1. : 1.;
+ else if ( theSign * refProj < 0.4 * theRefVec.Magnitude())
+ return thePrevLen; // to propagate movement forward only, not in side dir or backward
+
+ int iL1 = (iL + 1) % 3, iL2 = (iL + 2) % 3; // indices of the two other links of triangle
+ TLinkInSet link1 = theLinks.find( _sides[iL1] );
+ TLinkInSet link2 = theLinks.find( _sides[iL2] );
+
+ const QFace *f1 = 0, *f2 = 0; // adjacent faces
+ bool isBndLink1 = true, isBndLink2 = true;
+ if ( link1 != theLinks.end() && link2 != theLinks.end() )
+ {
+ f1 = link1->NextFace( this );
+ f2 = link2->NextFace( this );
+
+ isBndLink1 = ( theLink->MediumPos() > (*link1)->MediumPos() );
+ isBndLink2 = ( theLink->MediumPos() > (*link2)->MediumPos() );
+ if ( theStep == theFirstStep ) // (issue 22541) quad-dominant mesh
+ {
+ if ( !isBndLink1 && !f1 )
+ f1 = (*link1)->GetContinuesFace( this ); // get a quadrangle face
+ if ( !isBndLink2 && !f2 )
+ f2 = (*link2)->GetContinuesFace( this );
+ }
+ }
+ else if ( _sides.size() < 4 )
+ return thePrevLen;
+
+ // propagate to adjacent faces till limit step or boundary
+ double len1 = thePrevLen + (theLink->MiddlePnt() - _sides[iL1]->MiddlePnt()).Modulus();
+ double len2 = thePrevLen + (theLink->MiddlePnt() - _sides[iL2]->MiddlePnt()).Modulus();
+ gp_Vec linkDir1(0,0,0); // initialize to avoid valgrind error ("Conditional jump...")
+ gp_Vec linkDir2(0,0,0);
+ try {
+ OCC_CATCH_SIGNALS;
+ if ( f1 && !isBndLink1 )
+ len1 = f1->MoveByBoundary
+ ( *link1, theRefVec, theLinks, theFaceHelper, len1, theStep-1, &linkDir1, theSign);
+ else
+ linkDir1 = LinkNorm( iL1/*, theFaceHelper*/ );
+ } catch (...) {
+ MSG( " --------------- EXCEPTION");
+ return thePrevLen;
+ }
+ try {
+ OCC_CATCH_SIGNALS;
+ if ( f2 && !isBndLink2 )
+ len2 = f2->MoveByBoundary
+ ( *link2, theRefVec, theLinks, theFaceHelper, len2, theStep-1, &linkDir2, theSign);
+ else
+ linkDir2 = LinkNorm( iL2/*, theFaceHelper*/ );
+ } catch (...) {
+ MSG( " --------------- EXCEPTION");
+ return thePrevLen;
+ }
+
+ double fullLen = 0;
+ if ( theStep != theFirstStep )
+ {
+ // choose chain length by direction of propagation most codirected with theRefVec
+ bool choose1 = ( theRefVec * linkDir1 * theSign > theRefVec * linkDir2 * theSign );
+ fullLen = choose1 ? len1 : len2;
+ double r = thePrevLen / fullLen;
+
+ gp_Vec move = linkNorm * refProj * ( 1 - r );
+ theLink->Move( move, true );
+
+ MSG(string(theStep,'.')<<" Move "<< theLink->_mediumNode->GetID()<<
+ " by " << refProj * ( 1 - r ) << " following " <<
+ (choose1 ? *link1->_qlink : *link2->_qlink)); // warning: link1 can be invalid
+
+ if ( theLinkNorm ) *theLinkNorm = linkNorm;
+ }
+ return fullLen;
+ }
+
+ //================================================================================
+ /*!
+ * \brief Checks if the face is distorted due to bentLink
+ */
+ //================================================================================
+
+ bool QFace::IsSpoiled(const QLink* bentLink ) const
+ {
+ // code is valid for convex faces only
+ gp_XYZ gc(0,0,0);
+ for ( TIDSortedNodeSet::const_iterator n = begin(); n!=end(); ++n)
+ gc += XYZ( *n ) / size();
+ for (unsigned i = 0; i < _sides.size(); ++i )
+ {
+ if ( _sides[i] == bentLink ) continue;
+ gp_Vec linkNorm = _normal ^ gp_Vec( XYZ(_sides[i]->node1()), XYZ(_sides[i]->node2()));
+ gp_Vec vecOut( gc, _sides[i]->MiddlePnt() );
+ if ( linkNorm * vecOut < 0 )
+ linkNorm.Reverse();
+ double mag2 = linkNorm.SquareMagnitude();
+ if ( mag2 > numeric_limits<double>::min() )
+ linkNorm /= sqrt( mag2 );
+ gp_Vec vecBent ( _sides[i]->MiddlePnt(), bentLink->MediumPnt());
+ gp_Vec vecStraight( _sides[i]->MiddlePnt(), bentLink->MiddlePnt());
+ if ( vecBent * linkNorm > -0.1*vecStraight.Magnitude() )
+ return true;
+ }
+ return false;
+
+ }
+
+ //================================================================================
+ /*!
+ * \brief Find pairs of continues faces
+ */
+ //================================================================================
+
+ void QLink::SetContinuesFaces() const
+ {
+ // x0 x - QLink, [-|] - QFace, v - volume
+ // v0 | v1
+ // | Between _faces of link x2 two vertical faces are continues
+ // x1----x2-----x3 and two horizontal faces are continues. We set vertical faces
+ // | to _faces[0] and _faces[1] and horizontal faces to
+ // v2 | v3 _faces[2] and _faces[3] (or vise versa).
+ // x4
+
+ if ( _faces.empty() )
+ return;
+ int iFaceCont = -1, nbBoundary = 0, iBoundary[2]={-1,-1};
+ if ( _faces[0]->IsBoundary() )
+ iBoundary[ nbBoundary++ ] = 0;
+ for ( int iF = 1; iFaceCont < 0 && iF < _faces.size(); ++iF )
+ {
+ // look for a face bounding none of volumes bound by _faces[0]
+ bool sameVol = false;
+ int nbVol = _faces[iF]->NbVolumes();
+ for ( int iV = 0; !sameVol && iV < nbVol; ++iV )
+ sameVol = ( _faces[iF]->_volumes[iV] == _faces[0]->_volumes[0] ||
+ _faces[iF]->_volumes[iV] == _faces[0]->_volumes[1]);
+ if ( !sameVol )
+ iFaceCont = iF;
+ if ( _faces[iF]->IsBoundary() )
+ iBoundary[ nbBoundary++ ] = iF;
+ }
+ // Set continues faces: arrange _faces to have
+ // _faces[0] continues to _faces[1]
+ // _faces[2] continues to _faces[3]
+ if ( nbBoundary == 2 ) // bnd faces are continues
+ {
+ if (( iBoundary[0] < 2 ) != ( iBoundary[1] < 2 ))
+ {
+ int iNear0 = iBoundary[0] < 2 ? 1-iBoundary[0] : 5-iBoundary[0];
+ std::swap( _faces[ iBoundary[1] ], _faces[iNear0] );
+ }
+ }
+ else if ( iFaceCont > 0 ) // continues faces found
+ {
+ if ( iFaceCont != 1 )
+ std::swap( _faces[1], _faces[iFaceCont] );
+ }
+ else if ( _faces.size() > 1 ) // not found, set NULL by the first face
+ {
+ _faces.insert( ++_faces.begin(), (QFace*) 0 );
+ }
+ }
+ //================================================================================
+ /*!
+ * \brief Return a face continues to the given one
+ */
+ //================================================================================
+
+ const QFace* QLink::GetContinuesFace( const QFace* face ) const
+ {
+ for ( int i = 0; i < _faces.size(); ++i ) {
+ if ( _faces[i] == face ) {
+ int iF = i < 2 ? 1-i : 5-i;
+ return iF < _faces.size() ? _faces[iF] : 0;
+ }
+ }
+ return 0;
+ }
+ //================================================================================
+ /*!
+ * \brief True if link is on mesh boundary
+ */
+ //================================================================================
+
+ bool QLink::OnBoundary() const
+ {
+ for ( int i = 0; i < _faces.size(); ++i )
+ if (_faces[i] && _faces[i]->IsBoundary()) return true;
+ return false;
+ }
+ //================================================================================
+ /*!
+ * \brief Return normal of link of the chain
+ */
+ //================================================================================
+
+ gp_Vec TChainLink::Normal() const {
+ gp_Vec norm;
+ if (_qfaces[0]) norm = _qfaces[0]->_normal;
+ if (_qfaces[1]) norm += _qfaces[1]->_normal;
+ return norm;
+ }
+ //================================================================================
+ /*!
+ * \brief Test link curvature taking into account size of faces
+ */
+ //================================================================================
+
+ bool TChainLink::IsStraight() const
+ {
+ bool isStraight = _qlink->IsStraight();
+ if ( isStraight && _qfaces[0] && !_qfaces[1] )
+ {
+ int i = _qfaces[0]->LinkIndex( _qlink );
+ int iOpp = ( i + 2 ) % _qfaces[0]->_sides.size();
+ gp_XYZ mid1 = _qlink->MiddlePnt();
+ gp_XYZ mid2 = _qfaces[0]->_sides[ iOpp ]->MiddlePnt();
+ double faceSize2 = (mid1-mid2).SquareModulus();
+ isStraight = _qlink->_nodeMove.SquareMagnitude() < 1/10./10. * faceSize2;
+ }
+ return isStraight;
+ }
+
+ //================================================================================
+ /*!
+ * \brief Move medium nodes of vertical links of pentahedrons adjacent by side faces
+ */
+ //================================================================================
+
+ void fixPrism( TChain& allLinks )
+ {
+ // separate boundary links from internal ones
+ typedef set<const QLink*/*, QLink::PtrComparator*/> QLinkSet;
+ QLinkSet interLinks, bndLinks1, bndLink2;
+
+ bool isCurved = false;
+ for ( TChain::iterator lnk = allLinks.begin(); lnk != allLinks.end(); ++lnk ) {
+ if ( (*lnk)->OnBoundary() )
+ bndLinks1.insert( lnk->_qlink );
+ else
+ interLinks.insert( lnk->_qlink );
+ isCurved = isCurved || !lnk->IsStraight();
+ }
+ if ( !isCurved )
+ return; // no need to move
+
+ QLinkSet *curBndLinks = &bndLinks1, *newBndLinks = &bndLink2;
+
+ while ( !interLinks.empty() && !curBndLinks->empty() )
+ {
+ // propagate movement from boundary links to connected internal links
+ QLinkSet::iterator bnd = curBndLinks->begin(), bndEnd = curBndLinks->end();
+ for ( ; bnd != bndEnd; ++bnd )
+ {
+ const QLink* bndLink = *bnd;
+ for ( int i = 0; i < bndLink->_faces.size(); ++i ) // loop on faces of bndLink
+ {
+ const QFace* face = bndLink->_faces[i]; // quadrange lateral face of a prism
+ if ( !face ) continue;
+ // find and move internal link opposite to bndLink within the face
+ int interInd = ( face->LinkIndex( bndLink ) + 2 ) % face->_sides.size();
+ const QLink* interLink = face->_sides[ interInd ];
+ QLinkSet::iterator pInterLink = interLinks.find( interLink );
+ if ( pInterLink == interLinks.end() ) continue; // not internal link
+ interLink->Move( bndLink->_nodeMove );
+ // treated internal links become new boundary ones
+ interLinks.erase( pInterLink );
+ newBndLinks->insert( interLink );
+ }
+ }
+ curBndLinks->clear();
+ std::swap( curBndLinks, newBndLinks );
+ }
+ }
+
+ //================================================================================
+ /*!
+ * \brief Fix links of continues triangles near curved boundary
+ */
+ //================================================================================
+
+ void fixTriaNearBoundary( TChain & allLinks, SMESH_MesherHelper& /*helper*/)
+ {
+ if ( allLinks.empty() ) return;
+
+ TLinkSet linkSet( allLinks.begin(), allLinks.end());
+ TLinkInSet linkIt = linkSet.begin(), linksEnd = linkSet.end();
+
+ for ( linkIt = linkSet.begin(); linkIt != linksEnd; ++linkIt)
+ {
+ if ( linkIt->IsBoundary() && !linkIt->IsStraight() && linkIt->_qfaces[0])
+ {
+ // move iff a boundary link is bent towards inside of a face (issue 0021084)
+ const QFace* face = linkIt->_qfaces[0];
+ gp_XYZ pIn = ( face->_sides[0]->MiddlePnt() +
+ face->_sides[1]->MiddlePnt() +
+ face->_sides[2]->MiddlePnt() ) / 3.;
+ gp_XYZ insideDir( pIn - (*linkIt)->MiddlePnt());
+ bool linkBentInside = ((*linkIt)->_nodeMove.Dot( insideDir ) > 0 );
+ //if ( face->IsSpoiled( linkIt->_qlink ))
+ if ( linkBentInside )
+ face->MoveByBoundary( *linkIt, (*linkIt)->_nodeMove, linkSet );
+ }
+ }
+ }
+
+ //================================================================================
+ /*!
+ * \brief Detect rectangular structure of links and build chains from them
+ */
+ //================================================================================
+
+ enum TSplitTriaResult {
+ _OK, _NO_CORNERS, _FEW_ROWS, _MANY_ROWS, _NO_SIDELINK, _BAD_MIDQUAD, _NOT_RECT,
+ _NO_MIDQUAD, _NO_UPTRIA, _BAD_SET_SIZE, _BAD_CORNER, _BAD_START, _NO_BOTLINK, _TWISTED_CHAIN };
+
+ TSplitTriaResult splitTrianglesIntoChains( TChain & allLinks,
+ vector< TChain> & resultChains,
+ SMDS_TypeOfPosition pos )
+ {
+ // put links in the set and evalute number of result chains by number of boundary links
+ TLinkSet linkSet;
+ int nbBndLinks = 0;
+ for ( TChain::iterator lnk = allLinks.begin(); lnk != allLinks.end(); ++lnk ) {
+ linkSet.insert( *lnk );
+ nbBndLinks += lnk->IsBoundary();
+ }
+ resultChains.clear();
+ resultChains.reserve( nbBndLinks / 2 );
+
+ TLinkInSet linkIt, linksEnd = linkSet.end();
+
+ // find a boundary link with corner node; corner node has position pos-2
+ // i.e. SMDS_TOP_VERTEX for links on faces and SMDS_TOP_EDGE for
+ // links in volume
+ SMDS_TypeOfPosition cornerPos = SMDS_TypeOfPosition(pos-2);
+ const SMDS_MeshNode* corner = 0;
+ for ( linkIt = linkSet.begin(); linkIt != linksEnd; ++linkIt )
+ if ( linkIt->IsBoundary() && (corner = (*linkIt)->EndPosNode(cornerPos)))
+ break;
+ if ( !corner)
+ return _NO_CORNERS;
+
+ TLinkInSet startLink = linkIt;
+ const SMDS_MeshNode* startCorner = corner;
+ vector< TChain* > rowChains;
+ int iCol = 0;
+
+ while ( startLink != linksEnd) // loop on columns
+ {
+ // We suppose we have a rectangular structure like shown here. We have found a
+ // corner of the rectangle (startCorner) and a boundary link sharing
+ // |/ |/ | the startCorner (startLink). We are going to loop on rows of the
+ // --o---o---o structure making several chains at once. One chain (columnChain)
+ // |\ | /| starts at startLink and continues upward (we look at the structure
+ // \ | \ | / | from such point that startLink is on the bottom of the structure).
+ // \| \|/ | While going upward we also fill horizontal chains (rowChains) we
+ // --o---o---o encounter.
+ // /|\ |\ |
+ // / | \ | \ | startCorner
+ // | \| \|,'
+ // --o---o---o
+ // `.startLink
+
+ if ( resultChains.size() == nbBndLinks / 2 )
+ return _NOT_RECT;
+ resultChains.push_back( TChain() );
+ TChain& columnChain = resultChains.back();
+
+ TLinkInSet botLink = startLink; // current horizontal link to go up from
+ corner = startCorner; // current corner the botLink ends at
+ int iRow = 0;
+ while ( botLink != linksEnd ) // loop on rows
+ {
+ // add botLink to the columnChain
+ columnChain.push_back( *botLink );
+
+ const QFace* botTria = botLink->_qfaces[0]; // bottom triangle bound by botLink
+ if ( !botTria )
+ { // the column ends
+ if ( botLink == startLink )
+ return _TWISTED_CHAIN; // issue 0020951
+ linkSet.erase( botLink );
+ if ( iRow != rowChains.size() )
+ return _FEW_ROWS; // different nb of rows in columns
+ break;
+ }
+ // find the link dividing the quadrangle (midQuadLink) and vertical boundary
+ // link ending at <corner> (sideLink); there are two cases:
+ // 1) midQuadLink does not end at <corner>, then we easily find it by botTria,
+ // since midQuadLink is not at boundary while sideLink is.
+ // 2) midQuadLink ends at <corner>
+ bool isCase2;
+ TLinkInSet midQuadLink = linksEnd;
+ TLinkInSet sideLink = botTria->GetBoundaryLink( linkSet, *botLink, &midQuadLink,
+ corner, &isCase2 );
+ if ( isCase2 ) { // find midQuadLink among links of botTria
+ midQuadLink = botTria->GetLinkByNode( linkSet, *botLink, corner );
+ if ( midQuadLink->IsBoundary() )
+ return _BAD_MIDQUAD;
+ }
+ if ( sideLink == linksEnd || midQuadLink == linksEnd || sideLink == midQuadLink )
+ return sideLink == linksEnd ? _NO_SIDELINK : _NO_MIDQUAD;
+
+ // fill chains
+ columnChain.push_back( *midQuadLink );
+ if ( iRow >= rowChains.size() ) {
+ if ( iCol > 0 )
+ return _MANY_ROWS; // different nb of rows in columns
+ if ( resultChains.size() == nbBndLinks / 2 )
+ return _NOT_RECT;
+ resultChains.push_back( TChain() );
+ rowChains.push_back( & resultChains.back() );
+ }
+ rowChains[iRow]->push_back( *sideLink );
+ rowChains[iRow]->push_back( *midQuadLink );
+
+ const QFace* upTria = midQuadLink->NextFace( botTria ); // upper tria of the rectangle
+ if ( !upTria)
+ return _NO_UPTRIA;
+ if ( iRow == 0 ) {
+ // prepare startCorner and startLink for the next column
+ startCorner = startLink->NextNode( startCorner );
+ if (isCase2)
+ startLink = botTria->GetBoundaryLink( linkSet, *botLink, 0, startCorner );
+ else
+ startLink = upTria->GetBoundaryLink( linkSet, *midQuadLink, 0, startCorner );
+ // check if no more columns remains
+ if ( startLink != linksEnd ) {
+ const SMDS_MeshNode* botNode = startLink->NextNode( startCorner );
+ if ( (isCase2 ? botTria : upTria)->Contains( botNode ))
+ startLink = linksEnd; // startLink bounds upTria or botTria
+ else if ( startLink == botLink || startLink == midQuadLink || startLink == sideLink )
+ return _BAD_START;
+ }
+ }
+ // find bottom link and corner for the next row
+ corner = sideLink->NextNode( corner );
+ // next bottom link ends at the new corner
+ linkSet.erase( botLink );
+ botLink = upTria->GetLinkByNode( linkSet, (isCase2 ? *sideLink : *midQuadLink), corner );
+ if ( botLink == linksEnd || botLink == midQuadLink || botLink == sideLink)
+ return _NO_BOTLINK;
+ if ( midQuadLink == startLink || sideLink == startLink )
+ return _TWISTED_CHAIN; // issue 0020951
+ linkSet.erase( midQuadLink );
+ linkSet.erase( sideLink );
+
+ // make faces neighboring the found ones be boundary
+ if ( startLink != linksEnd ) {
+ const QFace* tria = isCase2 ? botTria : upTria;
+ for ( int iL = 0; iL < 3; ++iL ) {
+ linkIt = linkSet.find( tria->_sides[iL] );
+ if ( linkIt != linksEnd )
+ linkIt->RemoveFace( tria );
+ }
+ }
+ if ( botLink->_qfaces[0] == upTria || botLink->_qfaces[1] == upTria )
+ botLink->RemoveFace( upTria ); // make next botTria first in vector
+
+ iRow++;
+ } // loop on rows
+
+ iCol++;
+ }
+ // In the linkSet, there must remain the last links of rowChains; add them
+ if ( linkSet.size() != rowChains.size() )
+ return _BAD_SET_SIZE;
+ for ( int iRow = 0; iRow < rowChains.size(); ++iRow ) {
+ // find the link (startLink) ending at startCorner
+ corner = 0;
+ for ( startLink = linkSet.begin(); startLink != linksEnd; ++startLink ) {
+ if ( (*startLink)->node1() == startCorner ) {
+ corner = (*startLink)->node2(); break;
+ }
+ else if ( (*startLink)->node2() == startCorner) {
+ corner = (*startLink)->node1(); break;
+ }
+ }
+ if ( startLink == linksEnd )
+ return _BAD_CORNER;
+ rowChains[ iRow ]->push_back( *startLink );
+ linkSet.erase( startLink );
+ startCorner = corner;
+ }
+
+ return _OK;
+ }
+
+ //================================================================================
+ /*!
+ * \brief Place medium nodes at the link middle for elements whose corner nodes
+ * are out of geometrical boundary to prevent distorting elements.
+ * Issue 0020982, note 0013990
+ */
+ //================================================================================
+
+ void force3DOutOfBoundary( SMESH_MesherHelper& theHelper,
+ SMESH_ComputeErrorPtr& theError)
+ {
+ SMESHDS_Mesh* meshDS = theHelper.GetMeshDS();
+ TopoDS_Shape shape = theHelper.GetSubShape().Oriented( TopAbs_FORWARD );
+ if ( shape.IsNull() ) return;
+
+ if ( !theError ) theError = SMESH_ComputeError::New();
+
+ gp_XYZ faceNorm;
+
+ if ( shape.ShapeType() == TopAbs_FACE ) // 2D
+ {
+ if ( theHelper.GetMesh()->NbTriangles( ORDER_QUADRATIC ) < 1 ) return;
+
+ SMESHDS_SubMesh* faceSM = meshDS->MeshElements( shape );
+ if ( !faceSM ) return;
+
+ const TopoDS_Face& face = TopoDS::Face( shape );
+ Handle(Geom_Surface) surface = BRep_Tool::Surface( face );
+
+ TopExp_Explorer edgeIt( face, TopAbs_EDGE );
+ for ( ; edgeIt.More(); edgeIt.Next() ) // loop on EDGEs of a FACE
+ {
+ // check if the EDGE needs checking
+ const TopoDS_Edge& edge = TopoDS::Edge( edgeIt.Current() );
+ if ( SMESH_Algo::isDegenerated( edge ) )
+ continue;
+ if ( theHelper.IsRealSeam( edge ) &&
+ edge.Orientation() == TopAbs_REVERSED )
+ continue;
+
+ SMESHDS_SubMesh* edgeSM = meshDS->MeshElements( edge );
+ if ( !edgeSM ) continue;
+
+ double f,l;
+ Handle(Geom2d_Curve) pcurve = BRep_Tool::CurveOnSurface( edge, face, f, l );
+ BRepAdaptor_Curve curve3D( edge );
+ switch ( curve3D.GetType() ) {
+ case GeomAbs_Line: continue;
+ case GeomAbs_Circle:
+ case GeomAbs_Ellipse:
+ case GeomAbs_Hyperbola:
+ case GeomAbs_Parabola:
+ try
+ {
+ gp_Vec D1, D2, Du1, Dv1; gp_Pnt p;
+ curve3D.D2( 0.5 * ( f + l ), p, D1, D2 );
+ gp_Pnt2d uv = pcurve->Value( 0.5 * ( f + l ) );
+ surface->D1( uv.X(), uv.Y(), p, Du1, Dv1 );
+ gp_Vec fNorm = Du1 ^ Dv1;
+ if ( fNorm.IsParallel( D2, M_PI * 25./180. ))
+ continue; // face is normal to the curve3D
+
+ gp_Vec curvNorm = fNorm ^ D1;
+ if ( edge.Orientation() == TopAbs_REVERSED ) curvNorm.Reverse();
+ if ( curvNorm * D2 > 0 )
+ continue; // convex edge
+ }
+ catch ( Standard_Failure )
+ {
+ continue;
+ }
+ }
+ // get nodes shared by faces that may be distorted
+ SMDS_NodeIteratorPtr nodeIt;
+ if ( edgeSM->NbNodes() > 0 ) {
+ nodeIt = edgeSM->GetNodes();
+ }
+ else {
+ SMESHDS_SubMesh* vertexSM = meshDS->MeshElements( theHelper.IthVertex( 0, edge ));
+ if ( !vertexSM )
+ vertexSM = meshDS->MeshElements( theHelper.IthVertex( 1, edge ));
+ if ( !vertexSM ) continue;
+ nodeIt = vertexSM->GetNodes();
+ }
+
+ // find suspicious faces
+ TIDSortedElemSet checkedFaces;
+ vector< const SMDS_MeshNode* > nOnEdge( 2 );
+ const SMDS_MeshNode* nOnFace;
+ while ( nodeIt->more() )
+ {
+ const SMDS_MeshNode* n = nodeIt->next();
+ SMDS_ElemIteratorPtr faceIt = n->GetInverseElementIterator( SMDSAbs_Face );
+ while ( faceIt->more() )
+ {
+ const SMDS_MeshElement* f = faceIt->next();
+ if ( !faceSM->Contains( f ) ||
+ f->NbNodes() < 6 || // check quadratic triangles only
+ !checkedFaces.insert( f ).second )
+ continue;
+
+ // get nodes on EDGE and on FACE of a suspicious face
+ nOnEdge.clear(); nOnFace = 0;
+ SMDS_MeshElement::iterator triNode = f->begin_nodes();
+ for ( int nbN = 0; nbN < 3; ++triNode, ++nbN )
+ {
+ n = *triNode;
+ if ( n->GetPosition()->GetDim() == 2 )
+ nOnFace = n;
+ else
+ nOnEdge.push_back( n );
+ }
+
+ // check if nOnFace is inside the FACE
+ if ( nOnFace && nOnEdge.size() == 2 )
+ {
+ theHelper.AddTLinks( static_cast< const SMDS_MeshFace* > ( f ));
+ if ( !SMESH_MeshAlgos::FaceNormal( f, faceNorm, /*normalized=*/false ))
+ continue;
+ gp_XYZ edgeDir = SMESH_TNodeXYZ( nOnEdge[0] ) - SMESH_TNodeXYZ( nOnEdge[1] );
+ gp_XYZ edgeNorm = faceNorm ^ edgeDir;
+ n = theHelper.GetMediumNode( nOnEdge[0], nOnEdge[1], true );
+ gp_XYZ pN0 = SMESH_TNodeXYZ( nOnEdge[0] );
+ gp_XYZ pMedium = SMESH_TNodeXYZ( n ); // on-edge node location
+ gp_XYZ pFaceN = SMESH_TNodeXYZ( nOnFace ); // on-face node location
+ double hMedium = edgeNorm * gp_Vec( pN0, pMedium ).XYZ();
+ double hFace = edgeNorm * gp_Vec( pN0, pFaceN ).XYZ();
+ if ( Abs( hMedium ) > Abs( hFace * 0.6 ))
+ {
+ // nOnFace is out of FACE, move a medium on-edge node to the middle
+ gp_XYZ pMid3D = 0.5 * ( pN0 + SMESH_TNodeXYZ( nOnEdge[1] ));
+ meshDS->MoveNode( n, pMid3D.X(), pMid3D.Y(), pMid3D.Z() );
+ MSG( "move OUT of face " << n );
+ theError->myBadElements.push_back( f );
+ }
+ }
+ }
+ }
+ }
+ if ( !theError->myBadElements.empty() )
+ theError->myName = EDITERR_NO_MEDIUM_ON_GEOM;
+ return;
+
+ } // 2D ==============================================================================
+
+ if ( shape.ShapeType() == TopAbs_SOLID ) // 3D
+ {
+ if ( theHelper.GetMesh()->NbTetras ( ORDER_QUADRATIC ) < 1 &&
+ theHelper.GetMesh()->NbPyramids( ORDER_QUADRATIC ) < 1 ) return;
+
+ SMESHDS_SubMesh* solidSM = meshDS->MeshElements( shape );
+ if ( !solidSM ) return;
+
+ // check if the SOLID is bound by concave FACEs
+ vector< TopoDS_Face > concaveFaces;
+ TopExp_Explorer faceIt( shape, TopAbs_FACE );
+ for ( ; faceIt.More(); faceIt.Next() ) // loop on FACEs of a SOLID
+ {
+ const TopoDS_Face& face = TopoDS::Face( faceIt.Current() );
+ if ( !meshDS->MeshElements( face )) continue;
+
+ BRepAdaptor_Surface surface( face );
+ switch ( surface.GetType() ) {
+ case GeomAbs_Plane: continue;
+ case GeomAbs_Cylinder:
+ case GeomAbs_Cone:
+ case GeomAbs_Sphere:
+ try
+ {
+ double u = 0.5 * ( surface.FirstUParameter() + surface.LastUParameter() );
+ double v = 0.5 * ( surface.FirstVParameter() + surface.LastVParameter() );
+ gp_Vec Du1, Dv1, Du2, Dv2, Duv2; gp_Pnt p;
+ surface.D2( u,v, p, Du1, Dv1, Du2, Dv2, Duv2 );
+ gp_Vec fNorm = Du1 ^ Dv1;
+ if ( face.Orientation() == TopAbs_REVERSED ) fNorm.Reverse();
+ bool concaveU = ( fNorm * Du2 > 1e-100 );
+ bool concaveV = ( fNorm * Dv2 > 1e-100 );
+ if ( concaveU || concaveV )
+ concaveFaces.push_back( face );
+ }
+ catch ( Standard_Failure )
+ {
+ concaveFaces.push_back( face );
+ }
+ }
+ }
+ if ( concaveFaces.empty() )
+ return;
+
+ // fix 2D mesh on the SOLID
+ for ( faceIt.ReInit(); faceIt.More(); faceIt.Next() ) // loop on FACEs of a SOLID
+ {
+ SMESH_MesherHelper faceHelper( *theHelper.GetMesh() );
+ faceHelper.SetSubShape( faceIt.Current() );
+ force3DOutOfBoundary( faceHelper, theError );
+ }
+
+ // get an iterator over faces on concaveFaces
+ vector< SMDS_ElemIteratorPtr > faceIterVec( concaveFaces.size() );
+ for ( size_t i = 0; i < concaveFaces.size(); ++i )
+ faceIterVec[i] = meshDS->MeshElements( concaveFaces[i] )->GetElements();
+ typedef SMDS_IteratorOnIterators
+ < const SMDS_MeshElement*, vector< SMDS_ElemIteratorPtr > > TIterOnIter;
+ SMDS_ElemIteratorPtr faceIter( new TIterOnIter( faceIterVec ));
+
+ // a seacher to check if a volume is close to a concave face
+ std::auto_ptr< SMESH_ElementSearcher > faceSearcher
+ ( SMESH_MeshAlgos::GetElementSearcher( *theHelper.GetMeshDS(), faceIter ));
+
+ // classifier
+ //BRepClass3d_SolidClassifier solidClassifier( shape );
+
+ TIDSortedElemSet checkedVols, movedNodes;
+ //for ( faceIt.ReInit(); faceIt.More(); faceIt.Next() ) // loop on FACEs of a SOLID
+ for ( size_t iF = 0; iF < concaveFaces.size(); ++iF ) // loop on concave FACEs
+ {
+ //const TopoDS_Shape& face = faceIt.Current();
+ const TopoDS_Shape& face = concaveFaces[ iF ];
+ SMESHDS_SubMesh* faceSM = meshDS->MeshElements( face );
+ if ( !faceSM ) continue;
+
+ // get nodes shared by volumes (tet and pyra) on the FACE that may be distorted
+ SMDS_NodeIteratorPtr nodeIt;
+ if ( faceSM->NbNodes() > 0 ) {
+ nodeIt = faceSM->GetNodes();
+ }
+ else {
+ TopExp_Explorer vertex( face, TopAbs_VERTEX );
+ SMESHDS_SubMesh* vertexSM = meshDS->MeshElements( vertex.Current() );
+ if ( !vertexSM ) continue;
+ nodeIt = vertexSM->GetNodes();
+ }
+ // get ids of sub-shapes of the FACE
+ set< int > subIDs;
+ SMESH_subMeshIteratorPtr smIt =
+ theHelper.GetMesh()->GetSubMesh( face )->getDependsOnIterator(/*includeSelf=*/true);
+ while ( smIt->more() )
+ subIDs.insert( smIt->next()->GetId() );
+
+ // find suspicious volumes adjacent to the FACE
+ vector< const SMDS_MeshNode* > nOnFace( 4 );
+ const SMDS_MeshNode* nInSolid;
+ while ( nodeIt->more() )
+ {
+ const SMDS_MeshNode* n = nodeIt->next();
+ SMDS_ElemIteratorPtr volIt = n->GetInverseElementIterator( SMDSAbs_Volume );
+ while ( volIt->more() )
+ {
+ const SMDS_MeshElement* vol = volIt->next();
+ int nbN = vol->NbCornerNodes();
+ if ( ( nbN != 4 && nbN != 5 ) ||
+ !solidSM->Contains( vol ) ||
+ !checkedVols.insert( vol ).second )
+ continue;
+
+ // get nodes on FACE and in SOLID of a suspicious volume
+ nOnFace.clear(); nInSolid = 0;
+ SMDS_MeshElement::iterator volNode = vol->begin_nodes();
+ for ( int nb = nbN; nb > 0; ++volNode, --nb )
+ {
+ n = *volNode;
+ if ( n->GetPosition()->GetDim() == 3 )
+ nInSolid = n;
+ else if ( subIDs.count( n->getshapeId() ))
+ nOnFace.push_back( n );
+ else
+ nInSolid = n;
+ }
+ if ( !nInSolid || nOnFace.size() != nbN - 1 )
+ continue;
+
+ // get size of the vol
+ SMESH_TNodeXYZ pInSolid( nInSolid ), pOnFace0( nOnFace[0] );
+ double volLength = pInSolid.SquareDistance( nOnFace[0] );
+ for ( size_t i = 1; i < nOnFace.size(); ++i )
+ {
+ volLength = Max( volLength, pOnFace0.SquareDistance( nOnFace[i] ));
+ }
+
+ // check if vol is close to concaveFaces
+ const SMDS_MeshElement* closeFace =
+ faceSearcher->FindClosestTo( pInSolid, SMDSAbs_Face );
+ if ( !closeFace ||
+ pInSolid.SquareDistance( closeFace->GetNode(0) ) > 4 * volLength )
+ continue;
+
+ // check if vol is distorted, i.e. a medium node is much closer
+ // to nInSolid than the link middle
+ bool isDistorted = false;
+ SMDS_FaceOfNodes onFaceTria( nOnFace[0], nOnFace[1], nOnFace[2] );
+ if ( !SMESH_MeshAlgos::FaceNormal( &onFaceTria, faceNorm, /*normalized=*/false ))
+ continue;
+ theHelper.AddTLinks( static_cast< const SMDS_MeshVolume* > ( vol ));
+ vector< pair< SMESH_TLink, const SMDS_MeshNode* > > links;
+ for ( size_t i = 0; i < nOnFace.size(); ++i ) // loop on links between nOnFace
+ for ( size_t j = i+1; j < nOnFace.size(); ++j )
+ {
+ SMESH_TLink link( nOnFace[i], nOnFace[j] );
+ TLinkNodeMap::const_iterator linkIt =
+ theHelper.GetTLinkNodeMap().find( link );
+ if ( linkIt != theHelper.GetTLinkNodeMap().end() )
+ {
+ links.push_back( make_pair( linkIt->first, linkIt->second ));
+ if ( !isDistorted ) {
+ // compare projections of nInSolid and nMedium to face normal
+ gp_Pnt pMedium = SMESH_TNodeXYZ( linkIt->second );
+ double hMedium = faceNorm * gp_Vec( pOnFace0, pMedium ).XYZ();
+ double hVol = faceNorm * gp_Vec( pOnFace0, pInSolid ).XYZ();
+ isDistorted = ( Abs( hMedium ) > Abs( hVol * 0.5 ));
+ }
+ }
+ }
+ // move medium nodes to link middle
+ if ( isDistorted )
+ {
+ for ( size_t i = 0; i < links.size(); ++i )
+ {
+ const SMDS_MeshNode* nMedium = links[i].second;
+ if ( movedNodes.insert( nMedium ).second )
+ {
+ gp_Pnt pMid3D = 0.5 * ( SMESH_TNodeXYZ( links[i].first.node1() ) +
+ SMESH_TNodeXYZ( links[i].first.node2() ));
+ meshDS->MoveNode( nMedium, pMid3D.X(), pMid3D.Y(), pMid3D.Z() );
+ MSG( "move OUT of solid " << nMedium );
+ }
+ }
+ theError->myBadElements.push_back( vol );
+ }
+ } // loop on volumes sharing a node on FACE
+ } // loop on nodes on FACE
+ } // loop on FACEs of a SOLID
+
+ if ( !theError->myBadElements.empty() )
+ theError->myName = EDITERR_NO_MEDIUM_ON_GEOM;
+ } // 3D case
+ }
+
+} //namespace
+
+//=======================================================================
+/*!
+ * \brief Move medium nodes of faces and volumes to fix distorted elements
+ * \param error - container of fixed distorted elements
+ * \param volumeOnly - to fix nodes on faces or not, if the shape is solid
+ *
+ * Issue 0020307: EDF 992 SMESH : Linea/Quadratic with Medium Node on Geometry
+ */
+//=======================================================================
+
+void SMESH_MesherHelper::FixQuadraticElements(SMESH_ComputeErrorPtr& compError,
+ bool volumeOnly)
+{
+ // setenv NO_FixQuadraticElements to know if FixQuadraticElements() is guilty of bad conversion
+ if ( getenv("NO_FixQuadraticElements") )
+ return;
+
+ // 0. Apply algorithm to SOLIDs or FACEs
+ // ----------------------------------------------
+ if ( myShape.IsNull() ) {
+ if ( !myMesh->HasShapeToMesh() ) return;
+ SetSubShape( myMesh->GetShapeToMesh() );
+
+#ifdef _DEBUG_
+ int nbSolids = 0;
+ TopTools_IndexedMapOfShape solids;
+ TopExp::MapShapes(myShape,TopAbs_SOLID,solids);
+ nbSolids = solids.Extent();
+#endif
+ TopTools_MapOfShape faces; // faces not in solid or in not meshed solid
+ for ( TopExp_Explorer f(myShape,TopAbs_FACE,TopAbs_SOLID); f.More(); f.Next() ) {
+ faces.Add( f.Current() ); // not in solid
+ }
+ for ( TopExp_Explorer s(myShape,TopAbs_SOLID); s.More(); s.Next() ) {
+ if ( myMesh->GetSubMesh( s.Current() )->IsEmpty() ) { // get faces of solid
+ for ( TopExp_Explorer f( s.Current(), TopAbs_FACE); f.More(); f.Next() )
+ faces.Add( f.Current() ); // in not meshed solid
+ }
+ else { // fix nodes in the solid and its faces
+#ifdef _DEBUG_
+ MSG("FIX SOLID " << nbSolids-- << " #" << GetMeshDS()->ShapeToIndex(s.Current()));
+#endif
+ SMESH_MesherHelper h(*myMesh);
+ h.SetSubShape( s.Current() );
+ h.ToFixNodeParameters(true);
+ h.FixQuadraticElements( compError, false );
+ }
+ }
+ // fix nodes on geom faces
+#ifdef _DEBUG_
+ int nbfaces = faces.Extent(); /*avoid "unused varianbles": */ nbfaces++, nbfaces--;
+#endif
+ for ( TopTools_MapIteratorOfMapOfShape fIt( faces ); fIt.More(); fIt.Next() ) {
+ MSG("FIX FACE " << nbfaces-- << " #" << GetMeshDS()->ShapeToIndex(fIt.Key()));
+ SMESH_MesherHelper h(*myMesh);
+ h.SetSubShape( fIt.Key() );
+ h.ToFixNodeParameters(true);
+ h.FixQuadraticElements( compError, true);
+ }
+ //perf_print_all_meters(1);
+ if ( compError && compError->myName == EDITERR_NO_MEDIUM_ON_GEOM )
+ compError->myComment = "during conversion to quadratic, "
+ "some medium nodes were not placed on geometry to avoid distorting elements";
+ return;
+ }
+
+ // 1. Find out type of elements and get iterator on them
+ // ---------------------------------------------------
+
+ SMDS_ElemIteratorPtr elemIt;
+ SMDSAbs_ElementType elemType = SMDSAbs_All;
+
+ SMESH_subMesh* submesh = myMesh->GetSubMeshContaining( myShapeID );
+ if ( !submesh )
+ return;
+ if ( SMESHDS_SubMesh* smDS = submesh->GetSubMeshDS() ) {
+ elemIt = smDS->GetElements();
+ if ( elemIt->more() ) {
+ elemType = elemIt->next()->GetType();
+ elemIt = smDS->GetElements();
+ }
+ }
+ if ( !elemIt || !elemIt->more() || elemType < SMDSAbs_Face )
+ return;
+
+ // 2. Fill in auxiliary data structures
+ // ----------------------------------
+
+ set< QLink > links;
+ set< QFace > faces;
+ set< QLink >::iterator pLink;
+ set< QFace >::iterator pFace;
+
+ bool isCurved = false;
+ //bool hasRectFaces = false;
+ //set<int> nbElemNodeSet;
+ SMDS_VolumeTool volTool;
+
+ TIDSortedNodeSet apexOfPyramid;
+ const int apexIndex = 4;
+
+ // Issue 0020982
+ // Move medium nodes to the link middle for elements whose corner nodes
+ // are out of geometrical boundary to fix distorted elements.
+ force3DOutOfBoundary( *this, compError );
+
+ if ( elemType == SMDSAbs_Volume )
+ {
+ while ( elemIt->more() ) // loop on volumes
+ {
+ const SMDS_MeshElement* vol = elemIt->next();
+ if ( !vol->IsQuadratic() || !volTool.Set( vol ))
+ return;
+ double volMinSize2 = -1.;
+ for ( int iF = 0; iF < volTool.NbFaces(); ++iF ) // loop on faces of volume
+ {
+ int nbN = volTool.NbFaceNodes( iF );
+ //nbElemNodeSet.insert( nbN );
+ const SMDS_MeshNode** faceNodes = volTool.GetFaceNodes( iF );
+ vector< const QLink* > faceLinks( nbN/2 );
+ for ( int iN = 0; iN < nbN; iN += 2 ) // loop on links of a face
+ {
+ // store QLink
+ QLink link( faceNodes[iN], faceNodes[iN+2], faceNodes[iN+1] );
+ pLink = links.insert( link ).first;
+ faceLinks[ iN/2 ] = & *pLink;
+
+ if ( link.MediumPos() == SMDS_TOP_3DSPACE )
+ {
+ if ( !link.IsStraight() )
+ return; // already fixed
+ }
+ else if ( !isCurved )
+ {
+ if ( volMinSize2 < 0 ) volMinSize2 = volTool.MinLinearSize2();
+ isCurved = !isStraightLink( volMinSize2, link._nodeMove.SquareMagnitude() );
+ }
+ }
+ // store QFace
+ pFace = faces.insert( QFace( faceLinks )).first;
+ if ( pFace->NbVolumes() == 0 )
+ pFace->AddSelfToLinks();
+ pFace->SetVolume( vol );
+// hasRectFaces = hasRectFaces ||
+// ( volTool.GetVolumeType() == SMDS_VolumeTool::QUAD_HEXA ||
+// volTool.GetVolumeType() == SMDS_VolumeTool::QUAD_PENTA );
+#ifdef _DEBUG_
+ if ( nbN == 6 )
+ pFace->_face = GetMeshDS()->FindFace(faceNodes[0],faceNodes[2],faceNodes[4]);
+ else
+ pFace->_face = GetMeshDS()->FindFace(faceNodes[0],faceNodes[2],
+ faceNodes[4],faceNodes[6] );
+#endif
+ }
+ // collect pyramid apexes for further correction
+ if ( vol->NbCornerNodes() == 5 )
+ apexOfPyramid.insert( vol->GetNode( apexIndex ));
+ }
+ set< QLink >::iterator pLink = links.begin();
+ for ( ; pLink != links.end(); ++pLink )
+ pLink->SetContinuesFaces();
+ }
+ else
+ {
+ while ( elemIt->more() ) // loop on faces
+ {
+ const SMDS_MeshElement* face = elemIt->next();
+ if ( !face->IsQuadratic() )
+ continue;
+ //nbElemNodeSet.insert( face->NbNodes() );
+ int nbN = face->NbNodes()/2;
+ vector< const QLink* > faceLinks( nbN );
+ for ( int iN = 0; iN < nbN; ++iN ) // loop on links of a face
+ {
+ // store QLink
+ QLink link( face->GetNode(iN), face->GetNode((iN+1)%nbN), face->GetNode(iN+nbN) );
+ pLink = links.insert( link ).first;
+ faceLinks[ iN ] = & *pLink;
+ if ( !isCurved &&
+ link.node1()->GetPosition()->GetTypeOfPosition() < 2 &&
+ link.node2()->GetPosition()->GetTypeOfPosition() < 2 )
+ isCurved = !link.IsStraight();
+ }
+ // store QFace
+ pFace = faces.insert( QFace( faceLinks )).first;
+ pFace->AddSelfToLinks();
+ //hasRectFaces = ( hasRectFaces || nbN == 4 );
+ }
+ }
+ if ( !isCurved )
+ return; // no curved edges of faces
+
+ // 3. Compute displacement of medium nodes
+ // ---------------------------------------
+
+ // two loops on QFaces: the first is to treat boundary links, the second is for internal ones.
+ TopLoc_Location loc;
+ bool checkUV;
+ // not to treat boundary of volumic sub-mesh.
+ int isInside = ( elemType == SMDSAbs_Volume && volumeOnly ) ? 1 : 0;
+ for ( ; isInside < 2; ++isInside )
+ {
+ MSG( "--------------- LOOP (inside=" << isInside << ") ------------------");
+ SMDS_TypeOfPosition pos = isInside ? SMDS_TOP_3DSPACE : SMDS_TOP_FACE;
+ SMDS_TypeOfPosition bndPos = isInside ? SMDS_TOP_FACE : SMDS_TOP_EDGE;
+
+ for ( pFace = faces.begin(); pFace != faces.end(); ++pFace ) {
+ if ( bool(isInside) == pFace->IsBoundary() )
+ continue;
+ for ( int dir = 0; dir < 2; ++dir ) // 2 directions of propagation from the quadrangle
+ {
+ MSG( "CHAIN");
+ // make chain of links connected via continues faces
+ int error = ERR_OK;
+ TChain rawChain;
+ if ( !pFace->GetLinkChain( dir, rawChain, pos, error) && error ==ERR_UNKNOWN ) continue;
+ rawChain.reverse();
+ if ( !pFace->GetLinkChain( dir+2, rawChain, pos, error ) && error ==ERR_UNKNOWN ) continue;
+
+ vector< TChain > chains;
+ if ( error == ERR_OK ) { // chain contains continues rectangles
+ chains.resize(1);
+ chains[0].splice( chains[0].begin(), rawChain );
+ }
+ else if ( error == ERR_TRI ) { // chain contains continues triangles
+ TSplitTriaResult res = splitTrianglesIntoChains( rawChain, chains, pos );
+ if ( res != _OK ) { // not quadrangles split into triangles
+ fixTriaNearBoundary( rawChain, *this );
+ break;
+ }
+ }
+ else if ( error == ERR_PRISM ) { // quadrangle side faces of prisms
+ fixPrism( rawChain );
+ break;
+ }
+ else {
+ continue;
+ }
+ for ( int iC = 0; iC < chains.size(); ++iC )
+ {
+ TChain& chain = chains[iC];
+ if ( chain.empty() ) continue;
+ if ( chain.front().IsStraight() && chain.back().IsStraight() ) {
+ MSG("3D straight - ignore");
+ continue;
+ }
+ if ( chain.front()->MediumPos() > bndPos ||
+ chain.back() ->MediumPos() > bndPos ) {
+ MSG("Internal chain - ignore");
+ continue;
+ }
+ // mesure chain length and compute link position along the chain
+ double chainLen = 0;
+ vector< double > linkPos;
+ MSGBEG( "Link medium nodes: ");
+ TChain::iterator link0 = chain.begin(), link1 = chain.begin(), link2;
+ for ( ++link1; link1 != chain.end(); ++link1, ++link0 ) {
+ MSGBEG( (*link0)->_mediumNode->GetID() << "-" <<(*link1)->_mediumNode->GetID()<<" ");
+ double len = ((*link0)->MiddlePnt() - (*link1)->MiddlePnt()).Modulus();
+ while ( len < numeric_limits<double>::min() ) { // remove degenerated link
+ link1 = chain.erase( link1 );
+ if ( link1 == chain.end() )
+ break;
+ len = ((*link0)->MiddlePnt() - (*link1)->MiddlePnt()).Modulus();
+ }
+ chainLen += len;
+ linkPos.push_back( chainLen );
+ }
+ MSG("");
+ if ( linkPos.size() < 2 )
+ continue;
+
+ gp_Vec move0 = chain.front()->_nodeMove;
+ gp_Vec move1 = chain.back ()->_nodeMove;
+
+ TopoDS_Face face;
+ if ( !isInside )
+ {
+ // compute node displacement of end links of chain in parametric space of face
+ TChainLink& linkOnFace = *(++chain.begin());
+ const SMDS_MeshNode* nodeOnFace = linkOnFace->_mediumNode;
+ TopoDS_Shape f = GetSubShapeByNode( nodeOnFace, GetMeshDS() );
+ if ( !f.IsNull() && f.ShapeType() == TopAbs_FACE )
+ {
+ face = TopoDS::Face( f );
+ Handle(Geom_Surface) surf = BRep_Tool::Surface(face,loc);
+ bool isStraight[2];
+ for ( int is1 = 0; is1 < 2; ++is1 ) // move0 or move1
+ {
+ TChainLink& link = is1 ? chain.back() : chain.front();
+ gp_XY uvm = GetNodeUV( face, link->_mediumNode, nodeOnFace, &checkUV);
+ gp_XY uv1 = GetNodeUV( face, link->node1(), nodeOnFace, &checkUV);
+ gp_XY uv2 = GetNodeUV( face, link->node2(), nodeOnFace, &checkUV);
+ gp_XY uv12 = GetMiddleUV( surf, uv1, uv2);
+ // uvMove = uvm - uv12
+ gp_XY uvMove = applyIn2D(surf, uvm, uv12, gp_XY_Subtracted, /*inPeriod=*/false);
+ ( is1 ? move1 : move0 ).SetCoord( uvMove.X(), uvMove.Y(), 0 );
+ if ( !is1 ) // correct nodeOnFace for move1 (issue 0020919)
+ nodeOnFace = (*(++chain.rbegin()))->_mediumNode;
+ isStraight[is1] = isStraightLink( (uv2-uv1).SquareModulus(),
+ 10 * uvMove.SquareModulus());
+ }
+ if ( isStraight[0] && isStraight[1] ) {
+ MSG("2D straight - ignore");
+ continue; // straight - no need to move nodes of internal links
+ }
+
+ // check if a chain is already fixed
+ gp_XY uvm = GetNodeUV( face, linkOnFace->_mediumNode, 0, &checkUV);
+ gp_XY uv1 = GetNodeUV( face, linkOnFace->node1(), nodeOnFace, &checkUV);
+ gp_XY uv2 = GetNodeUV( face, linkOnFace->node2(), nodeOnFace, &checkUV);
+ gp_XY uv12 = GetMiddleUV( surf, uv1, uv2);
+ if (( uvm - uv12 ).SquareModulus() > 1e-10 )
+ {
+ MSG("Already fixed - ignore");
+ continue;
+ }
+ }
+ }
+ gp_Trsf trsf;
+ if ( isInside || face.IsNull() )
+ {
+ // compute node displacement of end links in their local coord systems
+ {
+ TChainLink& ln0 = chain.front(), ln1 = *(++chain.begin());
+ trsf.SetTransformation( gp_Ax3( gp::Origin(), ln0.Normal(),
+ gp_Vec( ln0->MiddlePnt(), ln1->MiddlePnt() )));
+ move0.Transform(trsf);
+ }
+ {
+ TChainLink& ln0 = *(++chain.rbegin()), ln1 = chain.back();
+ trsf.SetTransformation( gp_Ax3( gp::Origin(), ln1.Normal(),
+ gp_Vec( ln0->MiddlePnt(), ln1->MiddlePnt() )));
+ move1.Transform(trsf);
+ }
+ }
+ // compute displacement of medium nodes
+ link2 = chain.begin();
+ link0 = link2++;
+ link1 = link2++;
+ for ( int i = 0; link2 != chain.end(); ++link0, ++link1, ++link2, ++i )
+ {
+ double r = linkPos[i] / chainLen;
+ // displacement in local coord system
+ gp_Vec move = (1. - r) * move0 + r * move1;
+ if ( isInside || face.IsNull()) {
+ // transform to global
+ gp_Vec x01( (*link0)->MiddlePnt(), (*link1)->MiddlePnt() );
+ gp_Vec x12( (*link1)->MiddlePnt(), (*link2)->MiddlePnt() );
+ gp_Vec x = x01.Normalized() + x12.Normalized();
+ trsf.SetTransformation( gp_Ax3( gp::Origin(), link1->Normal(), x), gp_Ax3() );
+ move.Transform(trsf);
+ }
+ else {
+ // compute 3D displacement by 2D one
+ Handle(Geom_Surface) s = BRep_Tool::Surface(face,loc);
+ gp_XY oldUV = GetNodeUV( face, (*link1)->_mediumNode, 0, &checkUV);
+ gp_XY newUV = applyIn2D( s, oldUV, gp_XY( move.X(),move.Y()), gp_XY_Added);
+ gp_Pnt newPnt = s->Value( newUV.X(), newUV.Y());
+ move = gp_Vec( XYZ((*link1)->_mediumNode), newPnt.Transformed(loc) );
+ if ( SMDS_FacePosition* nPos =
+ dynamic_cast< SMDS_FacePosition* >((*link1)->_mediumNode->GetPosition()))
+ nPos->SetParameters( newUV.X(), newUV.Y() );
+#ifdef _DEBUG_
+ if ( (XYZ((*link1)->node1()) - XYZ((*link1)->node2())).SquareModulus() <
+ move.SquareMagnitude())
+ {
+ gp_XY uv0 = GetNodeUV( face, (*link0)->_mediumNode, 0, &checkUV);
+ gp_XY uv2 = GetNodeUV( face, (*link2)->_mediumNode, 0, &checkUV);
+ MSG( "TOO LONG MOVE \t" <<
+ "uv0: "<<uv0.X()<<", "<<uv0.Y()<<" \t" <<
+ "uv2: "<<uv2.X()<<", "<<uv2.Y()<<" \t" <<
+ "uvOld: "<<oldUV.X()<<", "<<oldUV.Y()<<" \t" <<
+ "newUV: "<<newUV.X()<<", "<<newUV.Y()<<" \t");
+ }
+#endif
+ }
+ (*link1)->Move( move );
+ MSG( "Move " << (*link1)->_mediumNode->GetID() << " following "
+ << chain.front()->_mediumNode->GetID() <<"-"
+ << chain.back ()->_mediumNode->GetID() <<
+ " by " << move.Magnitude());
+ }
+ } // loop on chains of links
+ } // loop on 2 directions of propagation from quadrangle
+ } // loop on faces
+ } // fix faces and/or volumes
+
+ // 4. Move nodes
+ // -------------
+
+ TIDSortedElemSet biQuadQuas, biQuadTris, triQuadHexa;
+ const SMDS_MeshElement *biQuadQua, *triQuadHex;
+ const bool toFixCentralNodes = ( myMesh->NbBiQuadQuadrangles() +
+ myMesh->NbBiQuadTriangles() +
+ myMesh->NbTriQuadraticHexas() );
+
+ for ( pLink = links.begin(); pLink != links.end(); ++pLink ) {
+ if ( pLink->IsMoved() )
+ {
+ gp_Pnt p = pLink->MiddlePnt() + pLink->Move();
+ GetMeshDS()->MoveNode( pLink->_mediumNode, p.X(), p.Y(), p.Z());
+
+ // collect bi-quadratic elements
+ if ( toFixCentralNodes )
+ {
+ biQuadQua = triQuadHex = 0;
+ SMDS_ElemIteratorPtr eIt = pLink->_mediumNode->GetInverseElementIterator();
+ while ( eIt->more() )
+ {
+ const SMDS_MeshElement* e = eIt->next();
+ switch( e->GetEntityType() ) {
+ case SMDSEntity_BiQuad_Quadrangle: biQuadQuas.insert( e ); break;
+ case SMDSEntity_BiQuad_Triangle: biQuadTris.insert( e ); break;
+ case SMDSEntity_TriQuad_Hexa: triQuadHexa.insert( e ); break;
+ default:;
+ }
+ }
+ }
+ }
+ }
+ // Fix positions of central nodes of bi-tri-quadratic elements
+
+ // treat bi-quad quadrangles
+ {
+ vector< const SMDS_MeshNode* > nodes( 9 );
+ gp_XY uv[ 9 ];
+ TIDSortedElemSet::iterator quadIt = biQuadQuas.begin();
+ for ( ; quadIt != biQuadQuas.end(); ++quadIt )
+ {
+ const SMDS_MeshElement* quad = *quadIt;
+ // nodes
+ nodes.clear();
+ nodes.assign( quad->begin_nodes(), quad->end_nodes() );
+ // FACE
+ TopoDS_Shape S = GetSubShapeByNode( nodes.back(), GetMeshDS() );
+ if ( S.IsNull() || S.ShapeType() != TopAbs_FACE ) continue;
+ const TopoDS_Face& F = TopoDS::Face( S );
+ Handle( Geom_Surface ) surf = BRep_Tool::Surface( F, loc );
+ const double tol = BRep_Tool::Tolerance( F );
+ // UV
+ for ( int i = 0; i < 8; ++i )
+ {
+ uv[ i ] = GetNodeUV( F, nodes[i], nodes[8], &checkUV );
+ // as this method is used after mesh generation, UV of nodes is not
+ // updated according to bending links, so we update
+ if ( i > 3 && nodes[i]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
+ CheckNodeUV( F, nodes[i], uv[ i ], 2*tol, /*force=*/true );
+ }
+ // move the central node
+ gp_XY uvCent = calcTFI (0.5, 0.5, uv[0],uv[1],uv[2],uv[3],uv[4],uv[5],uv[6],uv[7] );
+ gp_Pnt p = surf->Value( uvCent.X(), uvCent.Y() ).Transformed( loc );
+ GetMeshDS()->MoveNode( nodes[8], p.X(), p.Y(), p.Z());
+ }
+ }
+
+ // treat bi-quad triangles
+ {
+ vector< const SMDS_MeshNode* > nodes;
+ gp_XY uv[ 6 ];
+ TIDSortedElemSet::iterator triIt = biQuadTris.begin();
+ for ( ; triIt != biQuadTris.end(); ++triIt )
+ {
+ const SMDS_MeshElement* tria = *triIt;
+ // FACE
+ const TopoDS_Shape& S = GetMeshDS()->IndexToShape( tria->getshapeId() );
+ if ( S.IsNull() || S.ShapeType() != TopAbs_FACE ) continue;
+ const TopoDS_Face& F = TopoDS::Face( S );
+ Handle( Geom_Surface ) surf = BRep_Tool::Surface( F, loc );
+ const double tol = BRep_Tool::Tolerance( F );
+
+ // nodes
+ nodes.assign( tria->begin_nodes(), tria->end_nodes() );
+ // UV
+ for ( int i = 0; i < 6; ++i )
+ {
+ uv[ i ] = GetNodeUV( F, nodes[i], nodes[(i+1)%3], &checkUV );
+ // as this method is used after mesh generation, UV of nodes is not
+ // updated according to bending links, so we update
+ if ( nodes[i]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_FACE )
+ CheckNodeUV( F, nodes[i], uv[ i ], 2*tol, /*force=*/true );
+ }
+ // move the central node
+ gp_XY uvCent = GetCenterUV( uv[0], uv[1], uv[2], uv[3], uv[4], uv[5] );
+ gp_Pnt p = surf->Value( uvCent.X(), uvCent.Y() ).Transformed( loc );
+ GetMeshDS()->MoveNode( tria->GetNode(6), p.X(), p.Y(), p.Z() );
+ }
+ }
+
+ // treat tri-quadratic hexahedra
+ {
+ SMDS_VolumeTool volExp;
+ TIDSortedElemSet::iterator hexIt = triQuadHexa.begin();
+ for ( ; hexIt != triQuadHexa.end(); ++hexIt )
+ {
+ volExp.Set( *hexIt, /*ignoreCentralNodes=*/false );
+
+ // fix nodes central in sides
+ for ( int iQuad = 0; iQuad < volExp.NbFaces(); ++iQuad )
+ {
+ const SMDS_MeshNode** quadNodes = volExp.GetFaceNodes( iQuad );
+ if ( quadNodes[8]->GetPosition()->GetTypeOfPosition() == SMDS_TOP_3DSPACE )
+ {
+ gp_XYZ p = calcTFI( 0.5, 0.5,
+ SMESH_TNodeXYZ( quadNodes[0] ), SMESH_TNodeXYZ( quadNodes[2] ),
+ SMESH_TNodeXYZ( quadNodes[4] ), SMESH_TNodeXYZ( quadNodes[6] ),
+ SMESH_TNodeXYZ( quadNodes[1] ), SMESH_TNodeXYZ( quadNodes[3] ),
+ SMESH_TNodeXYZ( quadNodes[5] ), SMESH_TNodeXYZ( quadNodes[7] ));
+ GetMeshDS()->MoveNode( quadNodes[8], p.X(), p.Y(), p.Z());
+ }
+ }
+
+ // fix the volume central node
+ vector<gp_XYZ> pointsOnShapes( SMESH_Block::ID_Shell );
+ const SMDS_MeshNode** hexNodes = volExp.GetNodes();
+
+ pointsOnShapes[ SMESH_Block::ID_V000 ] = SMESH_TNodeXYZ( hexNodes[ 0 ] );
+ pointsOnShapes[ SMESH_Block::ID_V100 ] = SMESH_TNodeXYZ( hexNodes[ 3 ] );
+ pointsOnShapes[ SMESH_Block::ID_V010 ] = SMESH_TNodeXYZ( hexNodes[ 1 ] );
+ pointsOnShapes[ SMESH_Block::ID_V110 ] = SMESH_TNodeXYZ( hexNodes[ 2 ] );
+ pointsOnShapes[ SMESH_Block::ID_V001 ] = SMESH_TNodeXYZ( hexNodes[ 4 ] );
+ pointsOnShapes[ SMESH_Block::ID_V101 ] = SMESH_TNodeXYZ( hexNodes[ 7 ] );
+ pointsOnShapes[ SMESH_Block::ID_V011 ] = SMESH_TNodeXYZ( hexNodes[ 5 ] );
+ pointsOnShapes[ SMESH_Block::ID_V111 ] = SMESH_TNodeXYZ( hexNodes[ 6 ] );
+
+ pointsOnShapes[ SMESH_Block::ID_Ex00 ] = SMESH_TNodeXYZ( hexNodes[ 11 ] );
+ pointsOnShapes[ SMESH_Block::ID_Ex10 ] = SMESH_TNodeXYZ( hexNodes[ 9 ] );
+ pointsOnShapes[ SMESH_Block::ID_E0y0 ] = SMESH_TNodeXYZ( hexNodes[ 8 ] );
+ pointsOnShapes[ SMESH_Block::ID_E1y0 ] = SMESH_TNodeXYZ( hexNodes[ 10 ] );
+ pointsOnShapes[ SMESH_Block::ID_Ex01 ] = SMESH_TNodeXYZ( hexNodes[ 15 ] );
+ pointsOnShapes[ SMESH_Block::ID_Ex11 ] = SMESH_TNodeXYZ( hexNodes[ 13 ] );
+ pointsOnShapes[ SMESH_Block::ID_E0y1 ] = SMESH_TNodeXYZ( hexNodes[ 12 ] );
+ pointsOnShapes[ SMESH_Block::ID_E1y1 ] = SMESH_TNodeXYZ( hexNodes[ 14 ] );
+ pointsOnShapes[ SMESH_Block::ID_E00z ] = SMESH_TNodeXYZ( hexNodes[ 16 ] );
+ pointsOnShapes[ SMESH_Block::ID_E10z ] = SMESH_TNodeXYZ( hexNodes[ 19 ] );
+ pointsOnShapes[ SMESH_Block::ID_E01z ] = SMESH_TNodeXYZ( hexNodes[ 17 ] );
+ pointsOnShapes[ SMESH_Block::ID_E11z ] = SMESH_TNodeXYZ( hexNodes[ 18 ] );
+
+ pointsOnShapes[ SMESH_Block::ID_Fxy0 ] = SMESH_TNodeXYZ( hexNodes[ 20 ] );
+ pointsOnShapes[ SMESH_Block::ID_Fxy1 ] = SMESH_TNodeXYZ( hexNodes[ 25 ] );
+ pointsOnShapes[ SMESH_Block::ID_Fx0z ] = SMESH_TNodeXYZ( hexNodes[ 21 ] );
+ pointsOnShapes[ SMESH_Block::ID_Fx1z ] = SMESH_TNodeXYZ( hexNodes[ 23 ] );
+ pointsOnShapes[ SMESH_Block::ID_F0yz ] = SMESH_TNodeXYZ( hexNodes[ 24 ] );
+ pointsOnShapes[ SMESH_Block::ID_F1yz ] = SMESH_TNodeXYZ( hexNodes[ 22 ] );
+
+ gp_XYZ nCenterParams(0.5, 0.5, 0.5), nCenterCoords;
+ SMESH_Block::ShellPoint( nCenterParams, pointsOnShapes, nCenterCoords );
+ GetMeshDS()->MoveNode( hexNodes[26],
+ nCenterCoords.X(), nCenterCoords.Y(), nCenterCoords.Z());
+ }
+ }
+}
