-// Copyright (C) 2007-2013 CEA/DEN, EDF R&D, OPEN CASCADE
+// Copyright (C) 2007-2015 CEA/DEN, EDF R&D, OPEN CASCADE
//
// Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
// 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,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
#include "SMESH_MeshAlgos.hxx"
+#include "SMDS_FaceOfNodes.hxx"
#include "SMDS_LinearEdge.hxx"
-#include "SMDS_VolumeTool.hxx"
#include "SMDS_Mesh.hxx"
+#include "SMDS_PolygonalFaceOfNodes.hxx"
+#include "SMDS_VolumeTool.hxx"
#include "SMESH_OctreeNode.hxx"
#include <GC_MakeSegment.hxx>
/*!
* \brief Constructor
*/
- SMESH_NodeSearcherImpl( const SMDS_Mesh* theMesh )
+ SMESH_NodeSearcherImpl( const SMDS_Mesh* theMesh = 0,
+ SMDS_ElemIteratorPtr theElemIt = SMDS_ElemIteratorPtr() )
{
myMesh = ( SMDS_Mesh* ) theMesh;
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
return closestNode;
}
+ //---------------------------------------------------------------------
+ /*!
+ * \brief Finds nodes located within a tolerance near a point
+ */
+ int FindNearPoint(const gp_Pnt& point,
+ const double tolerance,
+ std::vector< const SMDS_MeshNode* >& foundNodes)
+ {
+ myOctreeNode->NodesAround( point.Coord(), foundNodes, tolerance );
+ return foundNodes.size();
+ }
+
//---------------------------------------------------------------------
/*!
* \brief Destructor
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];
}
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;
}
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++)
{
for (int j = 0; j < 8; j++)
{
ElementBndBoxTree* child = static_cast<ElementBndBoxTree*>( myChildren[j]);
- if ( child->_elements.size() <= MaxNbElemsInLeaf )
+ if ((int) child->_elements.size() <= MaxNbElemsInLeaf )
child->myIsLeaf = true;
if ( child->_elements.capacity() - child->_elements.size() > 1000 )
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 );
}
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 );
}
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 );
}
bool _outerFacesFound;
set<const SMDS_MeshElement*> _outerFaces; // empty means "no internal faces at all"
- SMESH_ElementSearcherImpl( SMDS_Mesh& mesh, SMDS_ElemIteratorPtr elemIt=SMDS_ElemIteratorPtr())
- : _mesh(&mesh),_meshPartIt(elemIt),_ebbTree(0),_nodeSearcher(0),_tolerance(-1),_outerFacesFound(false) {}
+ SMESH_ElementSearcherImpl( SMDS_Mesh& mesh,
+ double tol=-1,
+ SMDS_ElemIteratorPtr elemIt=SMDS_ElemIteratorPtr())
+ : _mesh(&mesh),_meshPartIt(elemIt),_ebbTree(0),_nodeSearcher(0),_tolerance(tol),_outerFacesFound(false) {}
virtual ~SMESH_ElementSearcherImpl()
{
if ( _ebbTree ) delete _ebbTree; _ebbTree = 0;
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);
{
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;
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;
// 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));
if ( type == SMDSAbs_Node || type == SMDSAbs_0DElement || type == SMDSAbs_Ball)
{
if ( !_nodeSearcher )
- _nodeSearcher = new SMESH_NodeSearcherImpl( _mesh );
-
- const SMDS_MeshNode* closeNode = _nodeSearcher->FindClosestTo( point );
- if ( !closeNode ) return foundElements.size();
-
- if ( point.Distance( SMESH_TNodeXYZ( closeNode )) > tolerance )
- return foundElements.size(); // to far from any node
+ {
+ 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 );
if ( type == SMDSAbs_Node )
{
- foundElements.push_back( closeNode );
+ foundElements.assign( foundNodes.begin(), foundNodes.end() );
}
else
{
- SMDS_ElemIteratorPtr elemIt = closeNode->GetInverseElementIterator( type );
- while ( elemIt->more() )
- foundElements.push_back( elemIt->next() );
+ for ( size_t i = 0; i < foundNodes.size(); ++i )
+ {
+ SMDS_ElemIteratorPtr elemIt = foundNodes[i]->GetInverseElementIterator( type );
+ while ( elemIt->more() )
+ foundElements.push_back( elemIt->next() );
+ }
}
}
// =================================================================================
{
const SMDS_MeshElement* closestElem = 0;
- if ( type == SMDSAbs_Face )
+ if ( type == SMDSAbs_Face || type == SMDSAbs_Volume )
{
if ( !_ebbTree || _elementType != type )
{
{
gp_Pnt boxCenter = 0.5 * ( _ebbTree->getBox()->CornerMin() +
_ebbTree->getBox()->CornerMax() );
- double radius;
+ double radius = -1;
if ( _ebbTree->getBox()->IsOut( point.XYZ() ))
radius = point.Distance( boxCenter ) - 0.5 * _ebbTree->maxSize();
- else
+ if ( radius < 0 )
radius = _ebbTree->maxSize() / pow( 2., _ebbTree->getHeight()) / 2;
while ( suspectElems.empty() )
{
TIDSortedElemSet::iterator elem = suspectElems.begin();
for ( ; elem != suspectElems.end(); ++elem )
{
- double dist = SMESH_MeshAlgos::GetDistance( dynamic_cast<const SMDS_MeshFace*>(*elem),
- point );
+ double dist = SMESH_MeshAlgos::GetDistance( *elem, point );
if ( dist < minDist + 1e-10)
{
minDist = dist;
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
// get ordered nodes
- vector< gp_XYZ > xyz;
- vector<const SMDS_MeshNode*> nodeList;
+ vector< SMESH_TNodeXYZ > xyz;
- SMDS_ElemIteratorPtr nodeIt = element->nodesIterator();
- if ( element->IsQuadratic() ) {
- nodeIt = element->interlacedNodesElemIterator();
- // if (const SMDS_VtkFace* f=dynamic_cast<const SMDS_VtkFace*>(element))
- // nodeIt = f->interlacedNodesElemIterator();
- // else if (const SMDS_VtkEdge* e =dynamic_cast<const SMDS_VtkEdge*>(element))
- // nodeIt = e->interlacedNodesElemIterator();
- }
+ SMDS_ElemIteratorPtr nodeIt = element->interlacedNodesElemIterator();
while ( nodeIt->more() )
{
SMESH_TNodeXYZ node = nodeIt->next();
xyz.push_back( node );
- nodeList.push_back(node._node);
}
- int i, nbNodes = (int) nodeList.size(); // central node of biquadratic is missing
+ int i, nbNodes = (int) xyz.size(); // central node of biquadratic is missing
if ( element->GetType() == SMDSAbs_Face ) // --------------------------------------------------
{
// compute face normal
gp_Vec faceNorm(0,0,0);
xyz.push_back( xyz.front() );
- nodeList.push_back( nodeList.front() );
for ( i = 0; i < nbNodes; ++i )
{
gp_Vec edge1( xyz[i+1], xyz[i]);
// degenerated face: point is out if it is out of all face edges
for ( i = 0; i < nbNodes; ++i )
{
- SMDS_LinearEdge edge( nodeList[i], nodeList[i+1] );
+ SMDS_LinearEdge edge( xyz[i]._node, xyz[i+1]._node );
if ( !IsOut( &edge, point, tol ))
return false;
}
// (we consider quadratic edge as being composed of two straight parts)
for ( i = 1; i < nbNodes; ++i )
{
- 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 )
+ 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. ) {
+ if ( n1p.SquareMagnitude() < tol * tol )
+ return false;
continue;
- gp_Vec n2p( xyz[i], point );
- if ( fabs( edge.Magnitude() - n1p.Magnitude() - n2p.Magnitude()) > tol )
+ }
+ if ( u >= 1. ) {
+ if ( point.SquareDistance( xyz[i] ) < tol * tol )
+ return false;
+ continue;
+ }
+ gp_XYZ proj = ( 1. - u ) * xyz[i-1] + u * xyz[i]; // projection of the point on the edge
+ double dist2 = point.SquareDistance( proj );
+ if ( dist2 > tol * tol )
continue;
return false; // point is ON this part
}
// Node or 0D element -------------------------------------------------------------------------
{
gp_Vec n2p ( xyz[0], point );
- return n2p.Magnitude() <= tol;
+ return n2p.SquareMagnitude() > tol * tol;
}
return true;
}
}
}
+//=======================================================================
+/*!
+ * \brief Return minimal distance from a point to an element
+ *
+ * Currently we ignore non-planarity and 2nd order of face
+ */
+//=======================================================================
+
+double SMESH_MeshAlgos::GetDistance( const SMDS_MeshElement* elem,
+ const gp_Pnt& point )
+{
+ switch ( elem->GetType() )
+ {
+ case SMDSAbs_Volume:
+ return GetDistance( dynamic_cast<const SMDS_MeshVolume*>( elem ), point);
+ case SMDSAbs_Face:
+ return GetDistance( dynamic_cast<const SMDS_MeshFace*>( elem ), point);
+ case SMDSAbs_Edge:
+ return GetDistance( dynamic_cast<const SMDS_MeshEdge*>( elem ), point);
+ case SMDSAbs_Node:
+ return point.Distance( SMESH_TNodeXYZ( elem ));
+ default:;
+ }
+ return -1;
+}
+
//=======================================================================
/*!
* \brief Return minimal distance from a point to a face
// cout << distVec.Magnitude() << " VERTEX " << face->GetNode(pos._index)->GetID() << endl;
return distVec.Magnitude();
}
+ default:;
}
return badDistance;
}
+//=======================================================================
+/*!
+ * \brief Return minimal distance from a point to an edge
+ */
+//=======================================================================
+
+double SMESH_MeshAlgos::GetDistance( const SMDS_MeshEdge* seg, const gp_Pnt& point )
+{
+ 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 );
+}
+
+//=======================================================================
+/*!
+ * \brief Return minimal distance from a point to a volume
+ *
+ * Currently we ignore non-planarity and 2nd order
+ */
+//=======================================================================
+
+double SMESH_MeshAlgos::GetDistance( const SMDS_MeshVolume* volume, const gp_Pnt& point )
+{
+ SMDS_VolumeTool vTool( volume );
+ vTool.SetExternalNormal();
+ const int iQ = volume->IsQuadratic() ? 2 : 1;
+
+ double n[3], bc[3];
+ double minDist = 1e100, dist;
+ for ( int iF = 0; iF < vTool.NbFaces(); ++iF )
+ {
+ // skip a facet with normal not "looking at" the point
+ if ( !vTool.GetFaceNormal( iF, n[0], n[1], n[2] ) ||
+ !vTool.GetFaceBaryCenter( iF, bc[0], bc[1], bc[2] ))
+ continue;
+ gp_XYZ bcp = point.XYZ() - gp_XYZ( bc[0], bc[1], bc[2] );
+ if ( gp_XYZ( n[0], n[1], n[2] ) * bcp < 1e-6 )
+ continue;
+
+ // find distance to a facet
+ const SMDS_MeshNode** nodes = vTool.GetFaceNodes( iF );
+ switch ( vTool.NbFaceNodes( iF ) / iQ ) {
+ case 3:
+ {
+ SMDS_FaceOfNodes tmpFace( nodes[0], nodes[ 1*iQ ], nodes[ 2*iQ ] );
+ dist = GetDistance( &tmpFace, point );
+ break;
+ }
+ case 4:
+ {
+ SMDS_FaceOfNodes tmpFace( nodes[0], nodes[ 1*iQ ], nodes[ 2*iQ ], nodes[ 3*iQ ]);
+ dist = GetDistance( &tmpFace, point );
+ break;
+ }
+ default:
+ vector<const SMDS_MeshNode *> nvec( nodes, nodes + vTool.NbFaceNodes( iF ));
+ SMDS_PolygonalFaceOfNodes tmpFace( nvec );
+ dist = GetDistance( &tmpFace, point );
+ }
+ minDist = Min( minDist, dist );
+ }
+ return minDist;
+}
+
//================================================================================
/*!
* \brief Returns barycentric coordinates of a point within a triangle.
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;
if ( !face && elem->IsQuadratic())
{
// analysis for quadratic elements using all nodes
- // const SMDS_VtkFace* F = dynamic_cast<const SMDS_VtkFace*>(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<const SMDS_MeshNode*>( anIter->next() );
for ( i1 = -1, i2 = 0; anIter->more() && !face; i1++, i2++ )
return false;
normal.SetCoord(0,0,0);
- int nbNodes = F->IsQuadratic() ? F->NbNodes()/2 : F->NbNodes();
+ int nbNodes = F->NbCornerNodes();
for ( int i = 0; i < nbNodes-2; ++i )
{
gp_XYZ p[3];
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
*/
//=======================================================================
-SMESH_ElementSearcher* SMESH_MeshAlgos::GetElementSearcher(SMDS_Mesh& mesh)
+SMESH_ElementSearcher* SMESH_MeshAlgos::GetElementSearcher(SMDS_Mesh& mesh,
+ double tolerance)
{
- return new SMESH_ElementSearcherImpl( mesh );
+ return new SMESH_ElementSearcherImpl( mesh, tolerance );
}
//=======================================================================
//=======================================================================
SMESH_ElementSearcher* SMESH_MeshAlgos::GetElementSearcher(SMDS_Mesh& mesh,
- SMDS_ElemIteratorPtr elemIt)
+ SMDS_ElemIteratorPtr elemIt,
+ double tolerance)
{
- return new SMESH_ElementSearcherImpl( mesh, elemIt );
+ return new SMESH_ElementSearcherImpl( mesh, tolerance, elemIt );
}
