X-Git-Url: http://git.salome-platform.org/gitweb/?p=modules%2Fsmesh.git;a=blobdiff_plain;f=src%2FSMESHUtils%2FSMESH_MeshAlgos.cxx;h=dbadd82505154cbcbbae5e0fca2c686f205a9697;hp=dc157e716fdc6fb6ae24352638dcb5e9fe29ed83;hb=20d9e162bd67182cbfa841bbfc9319919f4703e3;hpb=02ac54c6f33c5437c1d2204d704cf3da6fd31a8e diff --git a/src/SMESHUtils/SMESH_MeshAlgos.cxx b/src/SMESHUtils/SMESH_MeshAlgos.cxx index dc157e716..dbadd8250 100644 --- a/src/SMESHUtils/SMESH_MeshAlgos.cxx +++ b/src/SMESHUtils/SMESH_MeshAlgos.cxx @@ -1,4 +1,4 @@ -// Copyright (C) 2007-2015 CEA/DEN, EDF R&D, OPEN CASCADE +// Copyright (C) 2007-2016 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 @@ -60,7 +60,8 @@ struct SMESH_NodeSearcherImpl: public SMESH_NodeSearcher /*! * \brief Constructor */ - SMESH_NodeSearcherImpl( const SMDS_Mesh* theMesh ) + SMESH_NodeSearcherImpl( const SMDS_Mesh* theMesh = 0, + SMDS_ElemIteratorPtr theElemIt = SMDS_ElemIteratorPtr() ) { myMesh = ( SMDS_Mesh* ) theMesh; @@ -70,6 +71,14 @@ struct SMESH_NodeSearcherImpl: public SMESH_NodeSearcher while ( nIt->more() ) nodes.insert( nodes.end(), nIt->next() ); } + else if ( theElemIt ) + { + while ( theElemIt->more() ) + { + const SMDS_MeshElement* e = theElemIt->next(); + nodes.insert( e->begin_nodes(), e->end_nodes() ); + } + } myOctreeNode = new SMESH_OctreeNode(nodes) ; // get max size of a leaf box @@ -270,7 +279,7 @@ namespace // Utils used in SMESH_ElementSearcherImpl::FindElementsByPoint() ElementBndBoxTree::~ElementBndBoxTree() { - for ( int i = 0; i < _elements.size(); ++i ) + for ( size_t i = 0; i < _elements.size(); ++i ) if ( --_elements[i]->_refCount <= 0 ) delete _elements[i]; } @@ -284,7 +293,7 @@ namespace // Utils used in SMESH_ElementSearcherImpl::FindElementsByPoint() Bnd_B3d* ElementBndBoxTree::buildRootBox() { Bnd_B3d* box = new Bnd_B3d; - for ( int i = 0; i < _elements.size(); ++i ) + for ( size_t i = 0; i < _elements.size(); ++i ) box->Add( *_elements[i] ); return box; } @@ -297,7 +306,7 @@ namespace // Utils used in SMESH_ElementSearcherImpl::FindElementsByPoint() void ElementBndBoxTree::buildChildrenData() { - for ( int i = 0; i < _elements.size(); ++i ) + for ( size_t i = 0; i < _elements.size(); ++i ) { for (int j = 0; j < 8; j++) { @@ -315,7 +324,7 @@ namespace // Utils used in SMESH_ElementSearcherImpl::FindElementsByPoint() for (int j = 0; j < 8; j++) { ElementBndBoxTree* child = static_cast( myChildren[j]); - if ( child->_elements.size() <= MaxNbElemsInLeaf ) + if ((int) child->_elements.size() <= MaxNbElemsInLeaf ) child->myIsLeaf = true; if ( child->_elements.capacity() - child->_elements.size() > 1000 ) @@ -337,7 +346,7 @@ namespace // Utils used in SMESH_ElementSearcherImpl::FindElementsByPoint() if ( isLeaf() ) { - for ( int i = 0; i < _elements.size(); ++i ) + for ( size_t i = 0; i < _elements.size(); ++i ) if ( !_elements[i]->IsOut( point.XYZ() )) foundElems.insert( _elements[i]->_element ); } @@ -362,7 +371,7 @@ namespace // Utils used in SMESH_ElementSearcherImpl::FindElementsByPoint() if ( isLeaf() ) { - for ( int i = 0; i < _elements.size(); ++i ) + for ( size_t i = 0; i < _elements.size(); ++i ) if ( !_elements[i]->IsOut( line )) foundElems.insert( _elements[i]->_element ); } @@ -388,7 +397,7 @@ namespace // Utils used in SMESH_ElementSearcherImpl::FindElementsByPoint() if ( isLeaf() ) { - for ( int i = 0; i < _elements.size(); ++i ) + for ( size_t i = 0; i < _elements.size(); ++i ) if ( !_elements[i]->IsOut( center, radius )) foundElems.insert( _elements[i]->_element ); } @@ -458,6 +467,10 @@ struct SMESH_ElementSearcherImpl: public SMESH_ElementSearcher void GetElementsNearLine( const gp_Ax1& line, SMDSAbs_ElementType type, vector< const SMDS_MeshElement* >& foundElems); + void GetElementsInSphere( const gp_XYZ& center, + const double radius, + SMDSAbs_ElementType type, + vector< const SMDS_MeshElement* >& foundElems); double getTolerance(); bool getIntersParamOnLine(const gp_Lin& line, const SMDS_MeshElement* face, const double tolerance, double & param); @@ -466,6 +479,7 @@ struct SMESH_ElementSearcherImpl: public SMESH_ElementSearcher { return _outerFaces.empty() || _outerFaces.count(face); } + struct TInters //!< data of intersection of the line and the mesh face (used in GetPointState()) { const SMDS_MeshElement* _face; @@ -570,7 +584,7 @@ bool SMESH_ElementSearcherImpl::getIntersParamOnLine(const gp_Lin& lin { GC_MakeSegment edge( SMESH_TNodeXYZ( face->GetNode( i )), SMESH_TNodeXYZ( face->GetNode( (i+1)%nbNodes) )); - anExtCC.Init( lineCurve, edge); + anExtCC.Init( lineCurve, edge.Value() ); if ( anExtCC.NbExtrema() > 0 && anExtCC.LowerDistance() <= tol) { Quantity_Parameter pl, pe; @@ -646,6 +660,7 @@ void SMESH_ElementSearcherImpl::findOuterBoundary(const SMDS_MeshElement* outerF set< const SMDS_MeshElement*, TIDCompare >::const_iterator face = faces.begin(); for ( ; face != faces.end(); ++face ) { + if ( *face == outerFace ) continue; if ( !SMESH_MeshAlgos::FaceNormal( *face, fNorm, /*normalized=*/false )) continue; gp_Vec dirInF = gp_Vec( fNorm ) ^ n1n2; @@ -660,8 +675,8 @@ void SMESH_ElementSearcherImpl::findOuterBoundary(const SMDS_MeshElement* outerF // store the found outer face and add its links to continue seaching from if ( outerFace2 ) { - _outerFaces.insert( outerFace ); - int nbNodes = outerFace2->NbNodes()/( outerFace2->IsQuadratic() ? 2 : 1 ); + _outerFaces.insert( outerFace2 ); + int nbNodes = outerFace2->NbCornerNodes(); for ( int i = 0; i < nbNodes; ++i ) { SMESH_TLink link2( outerFace2->GetNode(i), outerFace2->GetNode((i+1)%nbNodes)); @@ -708,8 +723,12 @@ FindElementsByPoint(const gp_Pnt& point, if ( type == SMDSAbs_Node || type == SMDSAbs_0DElement || type == SMDSAbs_Ball) { if ( !_nodeSearcher ) - _nodeSearcher = new SMESH_NodeSearcherImpl( _mesh ); - + { + if ( _meshPartIt ) + _nodeSearcher = new SMESH_NodeSearcherImpl( 0, _meshPartIt ); + else + _nodeSearcher = new SMESH_NodeSearcherImpl( _mesh ); + } std::vector< const SMDS_MeshNode* > foundNodes; _nodeSearcher->FindNearPoint( point, tolerance, foundNodes ); @@ -887,8 +906,9 @@ TopAbs_State SMESH_ElementSearcherImpl::GetPointState(const gp_Pnt& point) } else if ( ! intersection.IsParallel() && intersection.NbPoints() > 0 ) { + double tol = 1e-4 * Sqrt( fNorm.Modulus() ); gp_Pnt intersectionPoint = intersection.Point(1); - if ( !SMESH_MeshAlgos::IsOut( *face, intersectionPoint, tolerance )) + if ( !SMESH_MeshAlgos::IsOut( *face, intersectionPoint, tol )) u2inters.insert(make_pair( intersection.ParamOnConic(1), TInters( *face, fNorm ))); } } @@ -967,16 +987,19 @@ TopAbs_State SMESH_ElementSearcherImpl::GetPointState(const gp_Pnt& point) // skip tangent intersections int nbTgt = 0; - const SMDS_MeshElement* prevFace = u_int1->second._face; - while ( ok && u_int2->second._coincides ) + if ( u_int2 != u2inters.end() ) { - if ( SMESH_MeshAlgos::GetCommonNodes(prevFace , u_int2->second._face).empty() ) - ok = false; - else + const SMDS_MeshElement* prevFace = u_int1->second._face; + while ( ok && u_int2->second._coincides ) { - nbTgt++; - u_int2++; - ok = ( u_int2 != u2inters.end() ); + if ( SMESH_MeshAlgos::GetCommonNodes(prevFace , u_int2->second._face).empty() ) + ok = false; + else + { + nbTgt++; + u_int2++; + ok = ( u_int2 != u2inters.end() ); + } } } if ( !ok ) break; @@ -1078,6 +1101,27 @@ void SMESH_ElementSearcherImpl::GetElementsNearLine( const gp_Ax1& foundElems.assign( suspectFaces.begin(), suspectFaces.end()); } +//======================================================================= +/* + * Return elements whose bounding box intersects a sphere + */ +//======================================================================= + +void SMESH_ElementSearcherImpl::GetElementsInSphere( const gp_XYZ& center, + const double radius, + SMDSAbs_ElementType type, + vector< const SMDS_MeshElement* >& foundElems) +{ + if ( !_ebbTree || _elementType != type ) + { + if ( _ebbTree ) delete _ebbTree; + _ebbTree = new ElementBndBoxTree( *_mesh, _elementType = type, _meshPartIt ); + } + TIDSortedElemSet suspectFaces; // elements possibly intersecting the line + _ebbTree->getElementsInSphere( center, radius, suspectFaces ); + foundElems.assign( suspectFaces.begin(), suspectFaces.end() ); +} + //======================================================================= /*! * \brief Return true if the point is IN or ON of the element @@ -1093,14 +1137,11 @@ bool SMESH_MeshAlgos::IsOut( const SMDS_MeshElement* element, const gp_Pnt& poin // get ordered nodes - vector< SMESH_TNodeXYZ > xyz; + vector< SMESH_TNodeXYZ > xyz; xyz.reserve( element->NbNodes()+1 ); SMDS_ElemIteratorPtr nodeIt = element->interlacedNodesElemIterator(); - while ( nodeIt->more() ) - { - SMESH_TNodeXYZ node = nodeIt->next(); - xyz.push_back( node ); - } + for ( int i = 0; nodeIt->more(); ++i ) + xyz.push_back( SMESH_TNodeXYZ( nodeIt->next() )); int i, nbNodes = (int) xyz.size(); // central node of biquadratic is missing @@ -1131,8 +1172,23 @@ bool SMESH_MeshAlgos::IsOut( const SMDS_MeshElement* element, const gp_Pnt& poin // check if the point lays on face plane gp_Vec n2p( xyz[0], point ); - if ( fabs( n2p * faceNorm ) > tol ) - return true; // not on face plane + double dot = n2p * faceNorm; + if ( Abs( dot ) > tol ) // not on face plane + { + bool isOut = true; + if ( nbNodes > 3 ) // maybe the face is not planar + { + double elemThick = 0; + for ( i = 1; i < nbNodes; ++i ) + { + gp_Vec n2n( xyz[0], xyz[i] ); + elemThick = Max( elemThick, Abs( n2n * faceNorm )); + } + isOut = Abs( dot ) > elemThick + tol; + } + if ( isOut ) + return isOut; + } // check if point is out of face boundary: // define it by closest transition of a ray point->infinity through face boundary @@ -1144,7 +1200,7 @@ bool SMESH_MeshAlgos::IsOut( const SMDS_MeshElement* element, const gp_Pnt& poin normSize = plnNorm.Magnitude(); if ( normSize <= tol ) return false; // point coincides with the first node plnNorm /= normSize; - // for each node of the face, compute its signed distance to the plane + // for each node of the face, compute its signed distance to the cutting plane vector dist( nbNodes + 1); for ( i = 0; i < nbNodes; ++i ) { @@ -1154,12 +1210,12 @@ bool SMESH_MeshAlgos::IsOut( const SMDS_MeshElement* element, const gp_Pnt& poin dist.back() = dist.front(); // find the closest intersection int iClosest = -1; - double rClosest, distClosest = 1e100;; + double rClosest = 0, distClosest = 1e100; gp_Pnt pClosest; for ( i = 0; i < nbNodes; ++i ) { double r; - if ( fabs( dist[i]) < tol ) + if ( fabs( dist[i] ) < tol ) r = 0.; else if ( fabs( dist[i+1]) < tol ) r = 1.; @@ -1168,17 +1224,14 @@ bool SMESH_MeshAlgos::IsOut( const SMDS_MeshElement* element, const gp_Pnt& poin else continue; // no intersection gp_Pnt pInt = xyz[i] * (1.-r) + xyz[i+1] * r; - gp_Vec p2int ( point, pInt); - if ( p2int * ray > -tol ) // right half-space + gp_Vec p2int( point, pInt); + double intDist = p2int.SquareMagnitude(); + if ( intDist < distClosest ) { - double intDist = p2int.SquareMagnitude(); - if ( intDist < distClosest ) - { - iClosest = i; - rClosest = r; - pClosest = pInt; - distClosest = intDist; - } + iClosest = i; + rClosest = r; + pClosest = pInt; + distClosest = intDist; } } if ( iClosest < 0 ) @@ -1202,6 +1255,7 @@ bool SMESH_MeshAlgos::IsOut( const SMDS_MeshElement* element, const gp_Pnt& poin bool covexCorner = ( edgeNorm * edgeAdjacent * (rClosest==1. ? 1. : -1.)) < 0; return covexCorner ? (out || out2) : (out && out2); } + if ( element->GetType() == SMDSAbs_Edge ) // -------------------------------------------------- { // point is out of edge if it is NOT ON any straight part of edge @@ -1210,19 +1264,13 @@ bool SMESH_MeshAlgos::IsOut( const SMDS_MeshElement* element, const gp_Pnt& poin { gp_Vec edge( xyz[i-1], xyz[i] ); gp_Vec n1p ( xyz[i-1], point ); - // double dist = ( edge ^ n1p ).Magnitude() / edge.Magnitude(); - // if ( dist > tol ) - // continue; - // gp_Vec n2p( xyz[i], point ); - // if ( fabs( edge.Magnitude() - n1p.Magnitude() - n2p.Magnitude()) > tol ) - // continue; double u = ( edge * n1p ) / edge.SquareMagnitude(); // param [0,1] on the edge - if ( u < 0. ) { + if ( u <= 0. ) { if ( n1p.SquareMagnitude() < tol * tol ) return false; continue; } - if ( u > 1. ) { + if ( u >= 1. ) { if ( point.SquareDistance( xyz[i] ) < tol * tol ) return false; continue; @@ -1235,10 +1283,11 @@ bool SMESH_MeshAlgos::IsOut( const SMDS_MeshElement* element, const gp_Pnt& poin } return true; } + // Node or 0D element ------------------------------------------------------------------------- { gp_Vec n2p ( xyz[0], point ); - return n2p.SquareMagnitude() <= tol * tol; + return n2p.SquareMagnitude() > tol * tol; } return true; } @@ -1331,6 +1380,7 @@ double SMESH_MeshAlgos::GetDistance( const SMDS_MeshElement* elem, return GetDistance( dynamic_cast( elem ), point); case SMDSAbs_Node: return point.Distance( SMESH_TNodeXYZ( elem )); + default:; } return -1; } @@ -1427,6 +1477,7 @@ double SMESH_MeshAlgos::GetDistance( const SMDS_MeshFace* face, // cout << distVec.Magnitude() << " VERTEX " << face->GetNode(pos._index)->GetID() << endl; return distVec.Magnitude(); } + default:; } return badDistance; } @@ -1437,9 +1488,35 @@ double SMESH_MeshAlgos::GetDistance( const SMDS_MeshFace* face, */ //======================================================================= -double SMESH_MeshAlgos::GetDistance( const SMDS_MeshEdge* edge, const gp_Pnt& point ) +double SMESH_MeshAlgos::GetDistance( const SMDS_MeshEdge* seg, const gp_Pnt& point ) { - throw SALOME_Exception(LOCALIZED("not implemented so far")); + double dist = Precision::Infinite(); + if ( !seg ) return dist; + + int i = 0, nbNodes = seg->NbNodes(); + + vector< SMESH_TNodeXYZ > xyz( nbNodes ); + SMDS_ElemIteratorPtr nodeIt = seg->interlacedNodesElemIterator(); + while ( nodeIt->more() ) + xyz[ i++ ].Set( nodeIt->next() ); + + for ( i = 1; i < nbNodes; ++i ) + { + gp_Vec edge( xyz[i-1], xyz[i] ); + gp_Vec n1p ( xyz[i-1], point ); + double u = ( edge * n1p ) / edge.SquareMagnitude(); // param [0,1] on the edge + if ( u <= 0. ) { + dist = Min( dist, n1p.SquareMagnitude() ); + } + else if ( u >= 1. ) { + dist = Min( dist, point.SquareDistance( xyz[i] )); + } + else { + gp_XYZ proj = ( 1. - u ) * xyz[i-1] + u * xyz[i]; // projection of the point on the edge + dist = Min( dist, point.SquareDistance( proj )); + } + } + return Sqrt( dist ); } //======================================================================= @@ -1543,14 +1620,12 @@ SMESH_MeshAlgos::FindFaceInSet(const SMDS_MeshNode* n1, int* n2ind) { - int i1, i2; + int i1 = 0, i2 = 0; const SMDS_MeshElement* face = 0; SMDS_ElemIteratorPtr invElemIt = n1->GetInverseElementIterator(SMDSAbs_Face); - //MESSAGE("n1->GetInverseElementIterator(SMDSAbs_Face) " << invElemIt); while ( invElemIt->more() && !face ) // loop on inverse faces of n1 { - //MESSAGE("in while ( invElemIt->more() && !face )"); const SMDS_MeshElement* elem = invElemIt->next(); if (avoidSet.count( elem )) continue; @@ -1569,9 +1644,6 @@ SMESH_MeshAlgos::FindFaceInSet(const SMDS_MeshNode* n1, if ( !face && elem->IsQuadratic()) { // analysis for quadratic elements using all nodes - // const SMDS_VtkFace* F = dynamic_cast(elem); - // if (!F) throw SALOME_Exception(LOCALIZED("not an SMDS_VtkFace")); - // use special nodes iterator SMDS_ElemIteratorPtr anIter = elem->interlacedNodesElemIterator(); const SMDS_MeshNode* prevN = static_cast( anIter->next() ); for ( i1 = -1, i2 = 0; anIter->more() && !face; i1++, i2++ ) @@ -1651,6 +1723,17 @@ SMESH_NodeSearcher* SMESH_MeshAlgos::GetNodeSearcher(SMDS_Mesh& mesh) return new SMESH_NodeSearcherImpl( &mesh ); } +//======================================================================= +/*! + * \brief Return SMESH_NodeSearcher + */ +//======================================================================= + +SMESH_NodeSearcher* SMESH_MeshAlgos::GetNodeSearcher(SMDS_ElemIteratorPtr elemIt) +{ + return new SMESH_NodeSearcherImpl( 0, elemIt ); +} + //======================================================================= /*! * \brief Return SMESH_ElementSearcher