#include "utilities.h"
+#include <BRepAdaptor_Surface.hxx>
#include <BRep_Tool.hxx>
#include <Bnd_B2d.hxx>
+#include <GeomAPI_ProjectPointOnSurf.hxx>
#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
#include <TopTools_DataMapIteratorOfDataMapOfShapeShape.hxx>
!SMESH_MesherHelper::IsSubShape( edge, _sourceHypo->GetSourceFace() ))
{
theStatus = HYP_BAD_PARAMETER;
+ error("Invalid source vertices");
SCRUTE((edge.IsNull()));
SCRUTE((SMESH_MesherHelper::IsSubShape( edge, srcMesh )));
SCRUTE((SMESH_MesherHelper::IsSubShape( edge, _sourceHypo->GetSourceFace() )));
if ( edge.IsNull() || !SMESH_MesherHelper::IsSubShape( edge, tgtMesh ))
{
theStatus = HYP_BAD_PARAMETER;
+ error("Invalid target vertices");
SCRUTE((edge.IsNull()));
SCRUTE((SMESH_MesherHelper::IsSubShape( edge, tgtMesh )));
}
!SMESH_MesherHelper::IsSubShape( edge, theShape ))
{
theStatus = HYP_BAD_PARAMETER;
+ error("Invalid target vertices");
SCRUTE((SMESH_MesherHelper::IsSubShape( edge, theShape )));
}
}
( srcMesh == tgtMesh && theShape == _sourceHypo->GetSourceFace() ))
{
theStatus = HYP_BAD_PARAMETER;
+ error("Invalid source face");
SCRUTE((SMESH_MesherHelper::IsSubShape( _sourceHypo->GetSourceFace(), srcMesh )));
SCRUTE((srcMesh == tgtMesh));
SCRUTE(( theShape == _sourceHypo->GetSourceFace() ));
*/
//================================================================================
- bool isOldNode( const SMDS_MeshNode* node/*, const bool is1DComputed*/ )
+ bool isOldNode( const SMDS_MeshNode* node )
{
// old nodes are shared by edges and new ones are shared
// only by faces created by mapper
//================================================================================
/*!
- * \brief Preform projection in case if tgtFace.IsPartner( srcFace ) and in case
- * if projection by transformation is possible
+ * \brief Check if two consecutive EDGEs are connected in 2D
+ * \param [in] E1 - a well oriented non-seam EDGE
+ * \param [in] E2 - a possibly well oriented seam EDGE
+ * \param [in] F - a FACE
+ * \return bool - result
*/
//================================================================================
- bool projectPartner(const TopoDS_Face& tgtFace,
- const TopoDS_Face& srcFace,
- SMESH_Mesh * tgtMesh,
- SMESH_Mesh * srcMesh,
- const TAssocTool::TShapeShapeMap& shape2ShapeMap)
+ bool are2dConnected( const TopoDS_Edge & E1,
+ const TopoDS_Edge & E2,
+ const TopoDS_Face & F )
+ {
+ double f,l;
+ Handle(Geom2d_Curve) c1 = BRep_Tool::CurveOnSurface( E1, F, f, l );
+ gp_Pnt2d uvLast1 = c1->Value( E1.Orientation() == TopAbs_REVERSED ? f : l );
+
+ Handle(Geom2d_Curve) c2 = BRep_Tool::CurveOnSurface( E2, F, f, l );
+ gp_Pnt2d uvFirst2 = c2->Value( f );
+ gp_Pnt2d uvLast2 = c2->Value( l );
+ double tol2 = 1e-5 * uvLast2.SquareDistance( uvFirst2 );
+
+ return (( uvLast1.SquareDistance( uvFirst2 ) < tol2 ) ||
+ ( uvLast1.SquareDistance( uvLast2 ) < tol2 ));
+ }
+
+ //================================================================================
+ /*!
+ * \brief Compose TSideVector for both FACEs keeping matching order of EDGEs
+ * and fill src2tgtNodes map
+ */
+ //================================================================================
+
+ TError getWires(const TopoDS_Face& tgtFace,
+ const TopoDS_Face& srcFace,
+ SMESH_Mesh * tgtMesh,
+ SMESH_Mesh * srcMesh,
+ const TAssocTool::TShapeShapeMap& shape2ShapeMap,
+ TSideVector& srcWires,
+ TSideVector& tgtWires,
+ TAssocTool::TNodeNodeMap& src2tgtNodes,
+ bool& is1DComputed)
{
SMESHDS_Mesh* tgtMeshDS = tgtMesh->GetMeshDS();
SMESHDS_Mesh* srcMeshDS = srcMesh->GetMeshDS();
- const double tol = 1.e-7 * srcMeshDS->getMaxDim();
+ src2tgtNodes.clear();
- gp_Trsf trsf; // transformation to get location of target nodes from source ones
- if ( tgtFace.IsPartner( srcFace ))
- {
- gp_Trsf srcTrsf = srcFace.Location();
- gp_Trsf tgtTrsf = tgtFace.Location();
- trsf = srcTrsf.Inverted() * tgtTrsf;
- }
- else
+ // get ordered src EDGEs
+ TError err;
+ srcWires = StdMeshers_FaceSide::GetFaceWires( srcFace, *srcMesh,/*skipMediumNodes=*/0, err);
+ if ( err && !err->IsOK() )
+ return err;
+
+ // make corresponding sequence of tgt EDGEs
+ tgtWires.resize( srcWires.size() );
+ for ( size_t iW = 0; iW < srcWires.size(); ++iW )
{
- // Try to find the transformation
-
- // make any local coord systems of src and tgt faces
- vector<gp_Pnt> srcPP, tgtPP; // 3 points on face boundaries to make axes of CS
- int tgtNbVert = SMESH_MesherHelper::Count( tgtFace, TopAbs_VERTEX, /*ignoreSame=*/true );
- int srcNbVert = SMESH_MesherHelper::Count( srcFace, TopAbs_VERTEX, /*ignoreSame=*/true );
- SMESH_subMesh * srcSM = srcMesh->GetSubMesh( srcFace );
- SMESH_subMeshIteratorPtr smIt = srcSM->getDependsOnIterator(/*includeSelf=*/false,false);
- srcSM = smIt->next(); // sm of a vertex
- while ( smIt->more() && srcPP.size() < 3 )
+ list< TopoDS_Edge > tgtEdges;
+ StdMeshers_FaceSidePtr srcWire = srcWires[iW];
+ TopTools_IndexedMapOfShape edgeMap; // to detect seam edges
+ for ( int iE = 0; iE < srcWire->NbEdges(); ++iE )
{
- srcSM = smIt->next();
- SMESHDS_SubMesh* srcSmds = srcSM->GetSubMeshDS();
- if ( !srcSmds ) continue;
- SMDS_NodeIteratorPtr nIt = srcSmds->GetNodes();
- while ( nIt->more() )
+ TopoDS_Edge srcE = srcWire->Edge( iE );
+ TopoDS_Edge tgtE = TopoDS::Edge( shape2ShapeMap( srcE, /*isSrc=*/true));
+ // reverse a seam edge encountered for the second time
+ const int index = edgeMap.Add( tgtE );
+ if ( index < edgeMap.Extent() ) // E is a seam
{
- SMESH_TNodeXYZ p ( nIt->next());
- bool pOK = false;
- switch ( srcPP.size() )
+ // check which of edges to reverse, E or one already being in tgtEdges
+ if ( are2dConnected( tgtEdges.back(), tgtE, tgtFace ))
{
- case 0: pOK = true; break;
-
- case 1: pOK = ( srcPP[0].SquareDistance( p ) > 10*tol ); break;
-
- case 2:
- {
- gp_Vec p0p1( srcPP[0], srcPP[1] ), p0p( srcPP[0], p );
- // pOK = !p0p1.IsParallel( p0p, tol );
- pOK = !p0p1.IsParallel( p0p, 3.14/20 ); // angle min 18 degrees
- break;
- }
+ list< TopoDS_Edge >::iterator eIt = tgtEdges.begin();
+ std::advance( eIt, index-1 );
+ eIt->Reverse();
}
- if ( !pOK )
- continue;
-
- // find corresponding point on target shape
- pOK = false;
- gp_Pnt tgtP;
- const TopoDS_Shape& tgtShape = shape2ShapeMap( srcSM->GetSubShape(), /*isSrc=*/true );
- if ( tgtShape.ShapeType() == TopAbs_VERTEX )
+ else
{
- tgtP = BRep_Tool::Pnt( TopoDS::Vertex( tgtShape ));
- if ( srcNbVert == tgtNbVert || tgtPP.empty() )
- pOK = true;
- else
- pOK = (( tgtP.Distance( tgtPP[0] ) > tol*tol ) &&
- ( tgtPP.size() == 1 || tgtP.Distance( tgtPP[1] ) > tol*tol ));
- //cout << "V - nS " << p._node->GetID() << " - nT " << SMESH_Algo::VertexNode(TopoDS::Vertex( tgtShape),tgtMeshDS)->GetID() << endl;
+ tgtE.Reverse();
}
- else if ( tgtPP.size() > 0 )
+ }
+ if ( srcWire->NbEdges() == 1 && tgtMesh == srcMesh ) // circle
+ {
+ // try to verify ori by propagation
+ pair<int,TopoDS_Edge> nE =
+ StdMeshers_ProjectionUtils::GetPropagationEdge( srcMesh, tgtE, srcE );
+ if ( !nE.second.IsNull() )
+ tgtE = nE.second;
+ }
+ tgtEdges.push_back( tgtE );
+
+
+ // Fill map of src to tgt nodes with nodes on edges
+
+ if ( srcMesh->GetSubMesh( srcE )->IsEmpty() ||
+ tgtMesh->GetSubMesh( tgtE )->IsEmpty() )
+ {
+ // add nodes on VERTEXes for a case of not meshes EDGEs
+ const TopoDS_Shape& srcV = SMESH_MesherHelper::IthVertex( 0, srcE );
+ const TopoDS_Shape& tgtV = shape2ShapeMap( srcV, /*isSrc=*/true );
+ const SMDS_MeshNode* srcN = SMESH_Algo::VertexNode( TopoDS::Vertex( srcV ), srcMeshDS );
+ const SMDS_MeshNode* tgtN = SMESH_Algo::VertexNode( TopoDS::Vertex( tgtV ), tgtMeshDS );
+ if ( srcN && tgtN )
+ src2tgtNodes.insert( make_pair( srcN, tgtN ));
+ }
+ else
+ {
+ map< double, const SMDS_MeshNode* > srcNodes, tgtNodes;
+ if (( ! SMESH_Algo::GetSortedNodesOnEdge( srcMeshDS, TopoDS::Edge( srcE ),
+ /*ignoreMediumNodes = */true,
+ srcNodes ))
+ ||
+ ( ! SMESH_Algo::GetSortedNodesOnEdge( tgtMeshDS, TopoDS::Edge( tgtE ),
+ /*ignoreMediumNodes = */true,
+ tgtNodes ))
+ )
+ return SMESH_ComputeError::New( COMPERR_BAD_INPUT_MESH,
+ "Invalid node parameters on edges");
+
+ if (( srcNodes.size() != tgtNodes.size() ) && tgtNodes.size() > 0 )
+ return SMESH_ComputeError::New( COMPERR_BAD_INPUT_MESH,
+ "Different number of nodes on edges");
+ if ( !tgtNodes.empty() )
{
- if ( SMESHDS_SubMesh* tgtSmds = tgtMeshDS->MeshElements( tgtShape ))
- {
- double srcDist = srcPP[0].Distance( p );
- double eTol = BRep_Tool::Tolerance( TopoDS::Edge( tgtShape ));
- if (eTol < tol) eTol = tol;
- SMDS_NodeIteratorPtr nItT = tgtSmds->GetNodes();
- while ( nItT->more() && !pOK )
- {
- const SMDS_MeshNode* n = nItT->next();
- tgtP = SMESH_TNodeXYZ( n );
- pOK = ( fabs( srcDist - tgtPP[0].Distance( tgtP )) < 2*eTol );
- //cout << "E - nS " << p._node->GetID() << " - nT " << n->GetID()<< " OK - " << pOK<< " " << fabs( srcDist - tgtPP[0].Distance( tgtP ))<< " tol " << eTol<< endl;
- }
- }
- }
- if ( !pOK )
- continue;
+ map< double, const SMDS_MeshNode* >::iterator u_tn = tgtNodes.begin();
+ map< double, const SMDS_MeshNode* >::iterator u_sn = srcNodes.begin();
+ for ( ; u_tn != tgtNodes.end(); ++u_tn, ++u_sn)
+ src2tgtNodes.insert( make_pair( u_sn->second, u_tn->second ));
- srcPP.push_back( p );
- tgtPP.push_back( tgtP );
+ is1DComputed = true;
+ }
}
- }
- if ( srcPP.size() != 3 )
- return false;
+ } // loop on EDGEs of a WIRE
- // make transformation
- gp_Trsf fromTgtCS, toSrcCS; // from/to global CS
- gp_Ax2 srcCS( srcPP[0], gp_Vec( srcPP[0], srcPP[1] ), gp_Vec( srcPP[0], srcPP[2]));
- gp_Ax2 tgtCS( tgtPP[0], gp_Vec( tgtPP[0], tgtPP[1] ), gp_Vec( tgtPP[0], tgtPP[2]));
- toSrcCS .SetTransformation( gp_Ax3( srcCS ));
- fromTgtCS.SetTransformation( gp_Ax3( tgtCS ));
- fromTgtCS.Invert();
+ tgtWires[ iW ].reset( new StdMeshers_FaceSide( tgtFace, tgtEdges, tgtMesh,
+ /*theIsForward = */ true,
+ /*theIgnoreMediumNodes = */false));
+ } // loop on WIREs
- trsf = fromTgtCS * toSrcCS;
- }
+ return TError();
+ }
- // Fill map of src to tgt nodes with nodes on edges
+ //================================================================================
+ /*!
+ * \brief Preform projection in case if tgtFace.IsPartner( srcFace ) and in case
+ * if projection by 3D transformation is possible
+ */
+ //================================================================================
+
+ bool projectPartner(const TopoDS_Face& tgtFace,
+ const TopoDS_Face& srcFace,
+ const TSideVector& tgtWires,
+ const TSideVector& srcWires,
+ const TAssocTool::TShapeShapeMap& shape2ShapeMap,
+ TAssocTool::TNodeNodeMap& src2tgtNodes,
+ const bool is1DComputed)
+ {
+ SMESH_Mesh * tgtMesh = tgtWires[0]->GetMesh();
+ SMESH_Mesh * srcMesh = srcWires[0]->GetMesh();
+ SMESHDS_Mesh* tgtMeshDS = tgtMesh->GetMeshDS();
+ SMESHDS_Mesh* srcMeshDS = srcMesh->GetMeshDS();
+ SMESH_MesherHelper helper( *tgtMesh );
- map<const SMDS_MeshNode* , const SMDS_MeshNode*> src2tgtNodes;
- map<const SMDS_MeshNode* , const SMDS_MeshNode*>::iterator srcN_tgtN;
+ const double tol = 1.e-7 * srcMeshDS->getMaxDim();
- for ( TopExp_Explorer srcExp( srcFace, TopAbs_EDGE); srcExp.More(); srcExp.Next() )
+ // transformation to get location of target nodes from source ones
+ StdMeshers_ProjectionUtils::TrsfFinder3D trsf;
+ if ( tgtFace.IsPartner( srcFace ))
{
- const TopoDS_Shape& srcEdge = srcExp.Current();
- const TopoDS_Shape& tgtEdge = shape2ShapeMap( srcEdge, /*isSrc=*/true );
- if ( srcMesh->GetSubMesh( srcEdge )->IsEmpty() ||
- tgtMesh->GetSubMesh( tgtEdge )->IsEmpty() )
- continue;
-
- map< double, const SMDS_MeshNode* > srcNodes, tgtNodes;
- if (( ! SMESH_Algo::GetSortedNodesOnEdge( srcMeshDS,
- TopoDS::Edge( srcEdge ),
- /*ignoreMediumNodes = */true,
- srcNodes ))
- ||
- ( ! SMESH_Algo::GetSortedNodesOnEdge( tgtMeshDS,
- TopoDS::Edge( tgtEdge ),
- /*ignoreMediumNodes = */true,
- tgtNodes ))
- ||
- (( srcNodes.size() != tgtNodes.size() ) && tgtNodes.size() > 0 )
- )
- return false;
+ gp_Trsf srcTrsf = srcFace.Location();
+ gp_Trsf tgtTrsf = tgtFace.Location();
+ trsf.Set( srcTrsf.Inverted() * tgtTrsf );
+ }
+ else
+ {
+ // Try to find the 3D transformation
- if ( !tgtEdge.IsPartner( srcEdge ))
+ const int totNbSeg = 50;
+ vector< gp_XYZ > srcPnts, tgtPnts;
+ srcPnts.reserve( totNbSeg );
+ tgtPnts.reserve( totNbSeg );
+ for ( size_t iW = 0; iW < srcWires.size(); ++iW )
{
- if ( tgtNodes.empty() )
- return false;
- // check that transformation is OK by three nodes
- gp_Pnt p0S = SMESH_TNodeXYZ( (srcNodes.begin()) ->second);
- gp_Pnt p1S = SMESH_TNodeXYZ( (srcNodes.rbegin()) ->second);
- gp_Pnt p2S = SMESH_TNodeXYZ( (++srcNodes.begin())->second);
-
- gp_Pnt p0T = SMESH_TNodeXYZ( (tgtNodes.begin()) ->second);
- gp_Pnt p1T = SMESH_TNodeXYZ( (tgtNodes.rbegin()) ->second);
- gp_Pnt p2T = SMESH_TNodeXYZ( (++tgtNodes.begin())->second);
-
- // transform source points, they must coincide with target ones
- if ( p0T.SquareDistance( p0S.Transformed( trsf )) > tol ||
- p1T.SquareDistance( p1S.Transformed( trsf )) > tol ||
- p2T.SquareDistance( p2S.Transformed( trsf )) > tol )
+ const double minSegLen = srcWires[iW]->Length() / totNbSeg;
+ for ( int iE = 0; iE < srcWires[iW]->NbEdges(); ++iE )
{
- //cout << "KO trsf, 3 dist: "
- //<< p0T.SquareDistance( p0S.Transformed( trsf ))<< ", "
- //<< p1T.SquareDistance( p1S.Transformed( trsf ))<< ", "
- //<< p2T.SquareDistance( p2S.Transformed( trsf ))<< ", "<<endl;
- return false;
+ int nbSeg = Max( 1, int( srcWires[iW]->EdgeLength( iE ) / minSegLen ));
+ double srcU = srcWires[iW]->FirstParameter( iE );
+ double tgtU = tgtWires[iW]->FirstParameter( iE );
+ double srcDu = ( srcWires[iW]->LastParameter( iE )- srcU ) / nbSeg;
+ double tgtDu = ( tgtWires[iW]->LastParameter( iE )- tgtU ) / nbSeg;
+ for ( size_t i = 0; i < nbSeg; ++i )
+ {
+ srcPnts.push_back( srcWires[iW]->Value3d( srcU ).XYZ() );
+ tgtPnts.push_back( tgtWires[iW]->Value3d( tgtU ).XYZ() );
+ srcU += srcDu;
+ tgtU += tgtDu;
+ }
}
}
- if ( !tgtNodes.empty() )
+ if ( !trsf.Solve( srcPnts, tgtPnts ))
+ return false;
+
+ // check trsf
+
+ bool trsfIsOK = true;
+ const int nbTestPnt = 20;
+ const size_t iStep = Max( 1, int( srcPnts.size() / nbTestPnt ));
+ // check boundary
+ for ( size_t i = 0; ( i < srcPnts.size() && trsfIsOK ); i += iStep )
+ {
+ gp_Pnt trsfTgt = trsf.Transform( srcPnts[i] );
+ trsfIsOK = ( trsfTgt.SquareDistance( tgtPnts[i] ) < tol*tol );
+ }
+ // check an in-FACE point
+ if ( trsfIsOK )
{
- map< double, const SMDS_MeshNode* >::iterator u_tn = tgtNodes.begin();
- map< double, const SMDS_MeshNode* >::iterator u_sn = srcNodes.begin();
- for ( ; u_tn != tgtNodes.end(); ++u_tn, ++u_sn)
- src2tgtNodes.insert( make_pair( u_sn->second, u_tn->second ));
+ BRepAdaptor_Surface srcSurf( srcFace );
+ gp_Pnt srcP =
+ srcSurf.Value( 0.5 * ( srcSurf.FirstUParameter() + srcSurf.LastUParameter() ),
+ 0.5 * ( srcSurf.FirstVParameter() + srcSurf.LastVParameter() ));
+ gp_Pnt tgtTrsfP = trsf.Transform( srcP );
+ TopLoc_Location loc;
+ GeomAPI_ProjectPointOnSurf& proj = helper.GetProjector( tgtFace, loc, 0.1*tol );
+ if ( !loc.IsIdentity() )
+ tgtTrsfP.Transform( loc.Transformation().Inverted() );
+ proj.Perform( tgtTrsfP );
+ trsfIsOK = ( proj.IsDone() &&
+ proj.NbPoints() > 0 &&
+ proj.LowerDistance() < tol );
}
+ if ( !trsfIsOK )
+ return false;
}
// Make new faces
// prepare the helper to adding quadratic elements if necessary
- SMESH_MesherHelper helper( *tgtMesh );
helper.SetSubShape( tgtFace );
helper.IsQuadraticSubMesh( tgtFace );
+ SMESHDS_SubMesh* srcSubDS = srcMeshDS->MeshElements( srcFace );
+ if ( !is1DComputed && srcSubDS->NbElements() )
+ helper.SetIsQuadratic( srcSubDS->GetElements()->next()->IsQuadratic() );
+
SMESH_MesherHelper srcHelper( *srcMesh );
srcHelper.SetSubShape( srcFace );
const SMDS_MeshNode* nullNode = 0;
+ TAssocTool::TNodeNodeMap::iterator srcN_tgtN;
// indices of nodes to create properly oriented faces
- bool isReverse = ( trsf.Form() != gp_Identity );
+ bool isReverse = ( !trsf.IsIdentity() );
int tri1 = 1, tri2 = 2, quad1 = 1, quad3 = 3;
if ( isReverse )
std::swap( tri1, tri2 ), std::swap( quad1, quad3 );
- SMESHDS_SubMesh* srcSubDS = srcMeshDS->MeshElements( srcFace );
SMDS_ElemIteratorPtr elemIt = srcSubDS->GetElements();
vector< const SMDS_MeshNode* > tgtNodes;
while ( elemIt->more() ) // loop on all mesh faces on srcFace
if ( srcN_tgtN->second == nullNode )
{
// create a new node
- gp_Pnt tgtP = gp_Pnt( SMESH_TNodeXYZ( srcNode )).Transformed( trsf );
+ gp_Pnt tgtP = trsf.Transform( SMESH_TNodeXYZ( srcNode ));
SMDS_MeshNode* n = helper.AddNode( tgtP.X(), tgtP.Y(), tgtP.Z() );
srcN_tgtN->second = n;
switch ( srcNode->GetPosition()->GetTypeOfPosition() )
} // bool projectPartner()
- //================================================================================
- /*!
- * \brief Check if two consecutive EDGEs are connected in 2D
- * \param [in] E1 - a well oriented non-seam EDGE
- * \param [in] E2 - a possibly well oriented seam EDGE
- * \param [in] F - a FACE
- * \return bool - result
- */
- //================================================================================
-
- bool are2dConnected( const TopoDS_Edge & E1,
- const TopoDS_Edge & E2,
- const TopoDS_Face & F )
- {
- double f,l;
- Handle(Geom2d_Curve) c1 = BRep_Tool::CurveOnSurface( E1, F, f, l );
- gp_Pnt2d uvLast1 = c1->Value( E1.Orientation() == TopAbs_REVERSED ? f : l );
-
- Handle(Geom2d_Curve) c2 = BRep_Tool::CurveOnSurface( E2, F, f, l );
- gp_Pnt2d uvFirst2 = c2->Value( f );
- gp_Pnt2d uvLast2 = c2->Value( l );
- double tol2 = 1e-5 * uvLast2.SquareDistance( uvFirst2 );
-
- return (( uvLast1.SquareDistance( uvFirst2 ) < tol2 ) ||
- ( uvLast1.SquareDistance( uvLast2 ) < tol2 ));
- }
-
//================================================================================
/*!
* \brief Preform projection in case if the faces are similar in 2D space
*/
//================================================================================
- bool projectBy2DSimilarity(const TopoDS_Face& tgtFace,
- const TopoDS_Face& srcFace,
- SMESH_Mesh * tgtMesh,
- SMESH_Mesh * srcMesh,
- const TAssocTool::TShapeShapeMap& shape2ShapeMap,
- const bool is1DComputed)
+ bool projectBy2DSimilarity(const TopoDS_Face& tgtFace,
+ const TopoDS_Face& srcFace,
+ const TSideVector& tgtWires,
+ const TSideVector& srcWires,
+ const TAssocTool::TShapeShapeMap& shape2ShapeMap,
+ TAssocTool::TNodeNodeMap& src2tgtNodes,
+ const bool is1DComputed)
{
- // 1) Preparation
-
- // get ordered src EDGEs
- TError err;
- TSideVector srcWires =
- StdMeshers_FaceSide::GetFaceWires( srcFace, *srcMesh,/*ignoreMediumNodes = */false, err);
- if ( err && !err->IsOK() )
- return false;
+ SMESH_Mesh * tgtMesh = tgtWires[0]->GetMesh();
+ SMESH_Mesh * srcMesh = srcWires[0]->GetMesh();
- // make corresponding sequence of tgt EDGEs
- TSideVector tgtWires( srcWires.size() );
- for ( size_t iW = 0; iW < srcWires.size(); ++iW )
- {
- list< TopoDS_Edge > tgtEdges;
- StdMeshers_FaceSidePtr srcWire = srcWires[iW];
- TopTools_IndexedMapOfShape edgeMap; // to detect seam edges
- for ( int iE = 0; iE < srcWire->NbEdges(); ++iE )
- {
- TopoDS_Edge E = TopoDS::Edge( shape2ShapeMap( srcWire->Edge( iE ), /*isSrc=*/true));
- // reverse a seam edge encountered for the second time
- const int index = edgeMap.Add( E );
- if ( index < edgeMap.Extent() ) // E is a seam
- {
- // check which of edges to reverse, E or one already being in tgtEdges
- if ( are2dConnected( tgtEdges.back(), E, tgtFace ))
- {
- list< TopoDS_Edge >::iterator eIt = tgtEdges.begin();
- std::advance( eIt, index-1 );
- eIt->Reverse();
- }
- else
- {
- E.Reverse();
- }
- }
- tgtEdges.push_back( E );
- }
- tgtWires[ iW ].reset( new StdMeshers_FaceSide( tgtFace, tgtEdges, tgtMesh,
- /*theIsForward = */ true,
- /*theIgnoreMediumNodes = */false));
- if ( is1DComputed &&
- srcWires[iW]->GetUVPtStruct().size() !=
- tgtWires[iW]->GetUVPtStruct().size())
- return false;
- }
+ // WARNING: we can have problems if the FACE is symmetrical in 2D,
+ // then the projection can be mirrored relating to what is expected
- // 2) Find transformation
+ // 1) Find 2D transformation
- gp_Trsf2d trsf;
+ StdMeshers_ProjectionUtils::TrsfFinder2D trsf;
{
// get 2 pairs of corresponding UVs
gp_Pnt2d srcP0 = srcWires[0]->Value2d(0.0);
toSrcCS .SetTransformation( srcCS );
fromTgtCS.SetTransformation( tgtCS );
fromTgtCS.Invert();
-
- trsf = fromTgtCS * toSrcCS;
+ trsf.Set( fromTgtCS * toSrcCS );
// check transformation
+ bool trsfIsOK = true;
const double tol = 1e-5 * gp_Vec2d( srcP0, srcP1 ).Magnitude();
- for ( double u = 0.12; u < 1.; u += 0.1 )
+ for ( double u = 0.12; ( u < 1. && trsfIsOK ); u += 0.1 )
{
- gp_Pnt2d srcUV = srcWires[0]->Value2d( u );
- gp_Pnt2d tgtUV = tgtWires[0]->Value2d( u );
- gp_Pnt2d tgtUV2 = srcUV.Transformed( trsf );
- if ( tgtUV.Distance( tgtUV2 ) > tol )
- return false;
+ gp_Pnt2d srcUV = srcWires[0]->Value2d( u );
+ gp_Pnt2d tgtUV = tgtWires[0]->Value2d( u );
+ gp_Pnt2d tgtUV2 = trsf.Transform( srcUV );
+ trsfIsOK = ( tgtUV.Distance( tgtUV2 ) < tol );
}
- }
- // 3) Projection
+ // Find trsf using a least-square approximation
+ if ( !trsfIsOK )
+ {
+ // find trsf
+ const int totNbSeg = 50;
+ vector< gp_XY > srcPnts, tgtPnts;
+ srcPnts.resize( totNbSeg );
+ tgtPnts.resize( totNbSeg );
+ for ( size_t iW = 0; iW < srcWires.size(); ++iW )
+ {
+ const double minSegLen = srcWires[iW]->Length() / totNbSeg;
+ for ( int iE = 0; iE < srcWires[iW]->NbEdges(); ++iE )
+ {
+ int nbSeg = Max( 1, int( srcWires[iW]->EdgeLength( iE ) / minSegLen ));
+ double srcU = srcWires[iW]->FirstParameter( iE );
+ double tgtU = tgtWires[iW]->FirstParameter( iE );
+ double srcDu = ( srcWires[iW]->LastParameter( iE )- srcU ) / nbSeg;
+ double tgtDu = ( tgtWires[iW]->LastParameter( iE )- tgtU ) / nbSeg;
+ for ( size_t i = 0; i < nbSeg; ++i, srcU += srcDu, tgtU += tgtDu )
+ {
+ srcPnts.push_back( srcWires[iW]->Value2d( srcU ).XY() );
+ tgtPnts.push_back( tgtWires[iW]->Value2d( tgtU ).XY() );
+ }
+ }
+ }
+ if ( !trsf.Solve( srcPnts, tgtPnts ))
+ return false;
- typedef map<const SMDS_MeshNode* , const SMDS_MeshNode*, TIDCompare> TN2NMap;
- TN2NMap src2tgtNodes;
- TN2NMap::iterator srcN_tgtN;
+ // check trsf
- // fill src2tgtNodes in with nodes on EDGEs
- for ( unsigned iW = 0; iW < srcWires.size(); ++iW )
- if ( is1DComputed )
- {
- const vector<UVPtStruct>& srcUVs = srcWires[iW]->GetUVPtStruct();
- const vector<UVPtStruct>& tgtUVs = tgtWires[iW]->GetUVPtStruct();
- for ( unsigned i = 0; i < srcUVs.size(); ++i )
- src2tgtNodes.insert( make_pair( srcUVs[i].node, tgtUVs[i].node ));
- }
- else
- {
- for ( int iE = 0; iE < srcWires[iW]->NbEdges(); ++iE )
+ trsfIsOK = true;
+ const int nbTestPnt = 10;
+ const size_t iStep = Max( 1, int( srcPnts.size() / nbTestPnt ));
+ for ( size_t i = 0; ( i < srcPnts.size() && trsfIsOK ); i += iStep )
{
- TopoDS_Vertex srcV = srcWires[iW]->FirstVertex(iE);
- TopoDS_Vertex tgtV = tgtWires[iW]->FirstVertex(iE);
- const SMDS_MeshNode* srcNode = SMESH_Algo::VertexNode( srcV, srcMesh->GetMeshDS() );
- const SMDS_MeshNode* tgtNode = SMESH_Algo::VertexNode( tgtV, tgtMesh->GetMeshDS() );
- if ( tgtNode && srcNode )
- src2tgtNodes.insert( make_pair( srcNode, tgtNode ));
+ gp_Pnt2d trsfTgt = trsf.Transform( srcPnts[i] );
+ trsfIsOK = ( trsfTgt.Distance( tgtPnts[i] ) < tol );
}
+ if ( !trsfIsOK )
+ return false;
}
+ } // "Find transformation" block
- // make elements
+ // 2) Projection
SMESHDS_SubMesh* srcSubDS = srcMesh->GetMeshDS()->MeshElements( srcFace );
srcHelper.SetSubShape( srcFace );
const SMDS_MeshNode* nullNode = 0;
+ TAssocTool::TNodeNodeMap::iterator srcN_tgtN;
SMDS_ElemIteratorPtr elemIt = srcSubDS->GetElements();
vector< const SMDS_MeshNode* > tgtNodes;
// create a new node
gp_Pnt2d srcUV = srcHelper.GetNodeUV( srcFace, srcNode,
elem->GetNode( helper.WrapIndex(i+1,nbN)), &uvOK);
- gp_Pnt2d tgtUV = srcUV.Transformed( trsf );
- gp_Pnt tgtP = tgtSurface->Value( tgtUV.X(), tgtUV.Y() );
+ gp_Pnt2d tgtUV = trsf.Transform( srcUV );
+ gp_Pnt tgtP = tgtSurface->Value( tgtUV.X(), tgtUV.Y() );
SMDS_MeshNode* n = tgtMeshDS->AddNode( tgtP.X(), tgtP.Y(), tgtP.Z() );
switch ( srcNode->GetPosition()->GetTypeOfPosition() )
{
} // bool projectBy2DSimilarity(...)
+ //================================================================================
+ /*!
+ * \brief Fix bad faces by smoothing
+ */
+ //================================================================================
+
+ void fixDistortedFaces( SMESH_MesherHelper& helper,
+ TSideVector& )
+ {
+ // Detect bad faces
+
+ bool haveBadFaces = false;
+
+ const TopoDS_Face& F = TopoDS::Face( helper.GetSubShape() );
+ SMESHDS_SubMesh* smDS = helper.GetMeshDS()->MeshElements( F );
+ if ( !smDS || smDS->NbElements() == 0 ) return;
+
+ SMDS_ElemIteratorPtr faceIt = smDS->GetElements();
+ double prevArea2D = 0;
+ vector< const SMDS_MeshNode* > nodes;
+ vector< gp_XY > uv;
+ 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;
+
+ // get 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 ];
+
+ uv.resize( nodes.size() );
+ for ( size_t i = 0; i < nodes.size(); ++i )
+ uv[ i ] = helper.GetNodeUV( F, nodes[ i ], inFaceNode );
+
+ // compare orientation of triangles
+ 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 ];
+ double area2D = v2 ^ v1;
+ if (( haveBadFaces = ( area2D * prevArea2D < 0 )))
+ break;
+ prevArea2D = area2D;
+ }
+ }
+
+ // Fix faces
+
+ if ( haveBadFaces )
+ {
+ SMESH_MeshEditor editor( helper.GetMesh() );
+
+ TIDSortedElemSet faces;
+ for ( faceIt = smDS->GetElements(); faceIt->more(); )
+ faces.insert( faces.end(), faceIt->next() );
+
+ // choose smoothing algo
+ //SMESH_MeshEditor:: SmoothMethod algo = SMESH_MeshEditor::CENTROIDAL;
+ bool isConcaveBoundary = false;
+ TError err;
+ TSideVector tgtWires =
+ StdMeshers_FaceSide::GetFaceWires( F, *helper.GetMesh(),/*skipMediumNodes=*/0, err);
+ for ( size_t iW = 0; iW < tgtWires.size() && !isConcaveBoundary; ++iW )
+ {
+ TopoDS_Edge prevEdge = tgtWires[iW]->Edge( tgtWires[iW]->NbEdges() - 1 );
+ for ( int iE = 0; iE < tgtWires[iW]->NbEdges() && !isConcaveBoundary; ++iE )
+ {
+ double angle = helper.GetAngle( prevEdge, tgtWires[iW]->Edge( iE ),
+ F, tgtWires[iW]->FirstVertex( iE ));
+ isConcaveBoundary = ( angle < -5. * M_PI / 180. );
+
+ prevEdge = tgtWires[iW]->Edge( iE );
+ }
+ }
+ SMESH_MeshEditor:: SmoothMethod algo =
+ isConcaveBoundary ? SMESH_MeshEditor::CENTROIDAL : SMESH_MeshEditor::LAPLACIAN;
+
+ // smoothing
+ set<const SMDS_MeshNode*> fixedNodes;
+ editor.Smooth( faces, fixedNodes, algo, /*nbIterations=*/ 10,
+ /*theTgtAspectRatio=*/1.0, /*the2D=*/false);
+ }
+ }
+
} // namespace
//=======================================================================
//function : Compute
-//purpose :
+//purpose :
//=======================================================================
bool StdMeshers_Projection_2D::Compute(SMESH_Mesh& theMesh, const TopoDS_Shape& theShape)
{
+ _src2tgtNodes.clear();
+
MESSAGE("Projection_2D Compute");
if ( !_sourceHypo )
return false;
// Projection
// ===========
- // find out if EDGEs are meshed or not
- bool is1DComputed = false;
- SMESH_subMeshIteratorPtr smIt = tgtSubMesh->getDependsOnIterator(/*includeSelf=*/false,
- /*complexShapeFirst=*/true);
- while ( smIt->more() && !is1DComputed )
- {
- SMESH_subMesh* sm = smIt->next();
- if ( sm->GetSubShape().ShapeType() == TopAbs_EDGE )
- is1DComputed = sm->IsMeshComputed();
- }
+ // get ordered src and tgt EDGEs
+ TSideVector srcWires, tgtWires;
+ bool is1DComputed = false; // if any tgt EDGE is meshed
+ TError err = getWires( tgtFace, srcFace, tgtMesh, srcMesh,
+ shape2ShapeMap, srcWires, tgtWires, _src2tgtNodes, is1DComputed );
+ if ( err && !err->IsOK() )
+ return error( err );
bool done = false;
- if ( !done )
+ if ( !done )
{
// try to project from the same face with different location
- done = projectPartner( tgtFace, srcFace, tgtMesh, srcMesh, shape2ShapeMap );
+ done = projectPartner( tgtFace, srcFace, tgtWires, srcWires,
+ shape2ShapeMap, _src2tgtNodes, is1DComputed );
}
if ( !done )
{
// projection in case if the faces are similar in 2D space
- done = projectBy2DSimilarity( tgtFace, srcFace, tgtMesh, srcMesh, shape2ShapeMap, is1DComputed);
+ done = projectBy2DSimilarity( tgtFace, srcFace, tgtWires, srcWires,
+ shape2ShapeMap, _src2tgtNodes, is1DComputed);
}
SMESH_MesherHelper helper( theMesh );
if ( !done )
{
+ _src2tgtNodes.clear();
// --------------------
// Prepare to mapping
// --------------------
return error(COMPERR_BAD_INPUT_MESH,"Can't load mesh pattern from the source face");
// --------------------
- // Perform 2D mapping
+ // Perform 2D mapping
// --------------------
// Compute mesh on a target face
// -------------------------------------------------------------------------
// mapper doesn't take care of nodes already existing on edges and vertices,
- // so we must merge nodes created by it with existing ones
+ // so we must merge nodes created by it with existing ones
// -------------------------------------------------------------------------
SMESH_MeshEditor::TListOfListOfNodes groupsOfNodes;
// Make groups of nodes to merge
// loop on EDGE and VERTEX sub-meshes of a target FACE
- smIt = tgtSubMesh->getDependsOnIterator(/*includeSelf=*/false,/*complexShapeFirst=*/false);
+ SMESH_subMeshIteratorPtr smIt = tgtSubMesh->getDependsOnIterator(/*includeSelf=*/false,
+ /*complexShapeFirst=*/false);
while ( smIt->more() )
{
SMESH_subMesh* sm = smIt->next();
if ( !smDS || smDS->NbNodes() == 0 )
continue;
//if ( !is1DComputed && sm->GetSubShape().ShapeType() == TopAbs_EDGE )
- //break;
+ // break;
if ( helper.IsDegenShape( sm->GetId() ) ) // to merge all nodes on degenerated
{
if ( nbFaceBeforeMerge != nbFaceAtferMerge && !helper.HasDegeneratedEdges() )
return error(COMPERR_BAD_INPUT_MESH, "Probably invalid node parameters on geom faces");
+
+ // ----------------------------------------------------------------
+ // The mapper can create distorted faces by placing nodes out of the FACE
+ // boundary -- fix bad faces by smoothing
+ // ----------------------------------------------------------------
+
+ fixDistortedFaces( helper, tgtWires );
+
// ----------------------------------------------------------------
// The mapper can't create quadratic elements, so convert if needed
// ----------------------------------------------------------------
