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https://git.salome-platform.org/gitpub/modules/smesh.git
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0021543: EDF 1978 SMESH: Viscous layer for 2D meshes
debug on a complex sketch
This commit is contained in:
eap
parent
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@ -53,6 +53,8 @@
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#include <Bnd_B3d.hxx>
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#include <ElCLib.hxx>
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#include <GCPnts_AbscissaPoint.hxx>
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#include <Geom2dAdaptor_Curve.hxx>
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#include <Geom2dInt_GInter.hxx>
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#include <Geom2d_Circle.hxx>
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#include <Geom2d_Line.hxx>
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#include <Geom2d_TrimmedCurve.hxx>
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@ -61,6 +63,7 @@
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#include <Geom_Curve.hxx>
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#include <Geom_Line.hxx>
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#include <Geom_TrimmedCurve.hxx>
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#include <IntRes2d_IntersectionPoint.hxx>
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#include <Precision.hxx>
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#include <Standard_ErrorHandler.hxx>
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#include <TColStd_Array1OfReal.hxx>
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@ -258,9 +261,16 @@ namespace VISCOUS_2D
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typedef vector< _LayerEdge >::iterator TEdgeIterator;
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bool IsCommonEdgeShared( const _PolyLine& other );
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size_t FirstLEdge() const { return _leftLine->_advancable ? 1 : 0; }
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bool IsAdjacent( const _Segment& seg ) const
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size_t FirstLEdge() const
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{
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return ( _leftLine->_advancable && _lEdges.size() > 2 ) ? 1 : 0;
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}
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bool IsAdjacent( const _Segment& seg, const _LayerEdge* LE=0 ) const
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{
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if ( LE && seg._indexInLine < _lEdges.size() &&
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( seg._uv[0] == & LE->_uvIn ||
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seg._uv[1] == & LE->_uvIn ))
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return true;
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return ( & seg == &_leftLine->_segments.back() ||
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& seg == &_rightLine->_segments[0] );
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}
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@ -421,6 +431,7 @@ StdMeshers_ViscousLayers2D::Compute(SMESH_Mesh& theMesh,
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theMesh.GetSubMesh( theFace )->GetComputeError() = error;
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else if ( !pm )
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pm.reset( new SMESH_ProxyMesh( theMesh ));
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//pm.reset();
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}
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else
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{
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@ -710,8 +721,8 @@ bool _ViscousBuilder2D::makePolyLines()
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L._segTree.reset( new _SegmentTree( L._segments ));
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}
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// Evaluate possible _thickness if required layers thickness seems too high
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// -------------------------------------------------------------------------
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// Evaluate max possible _thickness if required layers thickness seems too high
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// ----------------------------------------------------------------------------
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_thickness = _hyp->GetTotalThickness();
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_SegmentTree::box_type faceBndBox2D;
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@ -726,9 +737,12 @@ bool _ViscousBuilder2D::makePolyLines()
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for ( size_t iL1 = 0; iL1 < _polyLineVec.size(); ++iL1 )
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{
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_PolyLine& L1 = _polyLineVec[ iL1 ];
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const _SegmentTree::box_type* boxL1 = L1._segTree->getBox();
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for ( size_t iL2 = iL1+1; iL2 < _polyLineVec.size(); ++iL2 )
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{
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_PolyLine& L2 = _polyLineVec[ iL2 ];
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if ( boxL1->IsOut( *L2._segTree->getBox() ))
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continue;
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for ( size_t iLE = 1; iLE < L1._lEdges.size(); ++iLE )
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{
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foundSegs.clear();
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@ -790,16 +804,16 @@ bool _ViscousBuilder2D::makePolyLines()
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{
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lineBoxes[ iPoLine ] = *_polyLineVec[ iPoLine ]._segTree->getBox();
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if ( _polyLineVec[ iPoLine ]._advancable )
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lineBoxes[ iPoLine ].Enlarge( maxLen2dTo3dRatio * _thickness );
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lineBoxes[ iPoLine ].Enlarge( maxLen2dTo3dRatio * _thickness * 2 );
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}
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// _reachableLines
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for ( iPoLine = 0; iPoLine < _polyLineVec.size(); ++iPoLine )
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{
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_PolyLine& L1 = _polyLineVec[ iPoLine ];
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for ( size_t i = 0; i < _polyLineVec.size(); ++i )
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for ( size_t iL2 = 0; iL2 < _polyLineVec.size(); ++iL2 )
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{
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_PolyLine& L2 = _polyLineVec[ i ];
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if ( iPoLine == i || lineBoxes[ iPoLine ].IsOut( lineBoxes[ i ]))
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_PolyLine& L2 = _polyLineVec[ iL2 ];
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if ( iPoLine == iL2 || lineBoxes[ iPoLine ].IsOut( lineBoxes[ iL2 ]))
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continue;
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if ( !L1._advancable && ( L1._leftLine == &L2 || L1._rightLine == &L2 ))
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continue;
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@ -808,10 +822,8 @@ bool _ViscousBuilder2D::makePolyLines()
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for ( size_t iLE = 1; iLE < L1._lEdges.size(); iLE += iDelta )
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{
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_LayerEdge& LE = L1._lEdges[iLE];
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if ( !lineBoxes[ i ].IsOut ( LE._uvOut,
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LE._uvOut + LE._normal2D * _thickness * LE._len2dTo3dRatio )
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&&
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!L1.IsAdjacent( L2._segments[0] ))
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if ( !lineBoxes[ iL2 ].IsOut ( LE._uvOut,
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LE._uvOut + LE._normal2D *_thickness * LE._len2dTo3dRatio ))
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{
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L1._reachableLines.push_back( & L2 );
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break;
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@ -849,14 +861,17 @@ void _ViscousBuilder2D::adjustCommonEdge( _PolyLine& LL, _PolyLine& LR )
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gp_XY normL = EL._normal2D;
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gp_XY normR = ER._normal2D;
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gp_XY tangL ( normL.Y(), -normL.X() );
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//gp_XY tangR ( normR.Y(), -normR.X() );
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gp_XY normCommon = ( normL + normR ).Normalized(); // average normal at VERTEX
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// set common direction to a VERTEX _LayerEdge shared by two _PolyLine's
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gp_XY normCommon = ( normL * int( LL._advancable ) +
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normR * int( LR._advancable )).Normalized();
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EL._normal2D = normCommon;
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EL._ray.SetLocation ( EL._uvOut );
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EL._ray.SetDirection( EL._normal2D );
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if ( nbAdvancableL == 1 ) {
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EL._isBlocked = true;
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EL._length2D = 0;
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}
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// update _LayerEdge::_len2dTo3dRatio according to a new direction
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const vector<UVPtStruct>& points = LL._wire->GetUVPtStruct();
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setLenRatio( EL, SMESH_TNodeXYZ( points[ LL._lastPntInd ].node ));
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@ -865,48 +880,85 @@ void _ViscousBuilder2D::adjustCommonEdge( _PolyLine& LL, _PolyLine& LR )
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const double dotNormTang = normR * tangL;
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const bool largeAngle = Abs( dotNormTang ) > 0.2;
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if ( largeAngle )
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if ( largeAngle ) // not 180 degrees
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{
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// recompute _len2dTo3dRatio to take into account angle between EDGEs
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gp_Vec2d oldNorm( LL._advancable ? normL : normR );
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double fact = 1. / Max( 0.3, Cos( oldNorm.Angle( normCommon )));
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EL._len2dTo3dRatio *= fact;
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double angleFactor = 1. / Max( 0.3, Cos( oldNorm.Angle( normCommon )));
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EL._len2dTo3dRatio *= angleFactor;
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ER._len2dTo3dRatio = EL._len2dTo3dRatio;
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gp_XY normAvg = ( normL + normR ).Normalized(); // average normal at VERTEX
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if ( dotNormTang < 0. ) // ---------------------------- CONVEX ANGLE
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{
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// Remove _LayerEdge's intersecting the normCommon
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// Remove _LayerEdge's intersecting the normAvg to avoid collisions
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// during inflate().
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//
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// find max length of the VERTEX based _LayerEdge whose direction is normAvg
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double maxLen2D = _thickness * EL._len2dTo3dRatio;
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const gp_XY& pCommOut = ER._uvOut;
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gp_XY pCommIn( pCommOut + normCommon * _thickness * EL._len2dTo3dRatio );
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gp_XY pCommIn = pCommOut + normAvg * maxLen2D;
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_Segment segCommon( pCommOut, pCommIn );
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_SegmentIntersection intersection;
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vector< const _Segment* > foundSegs;
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for ( size_t iL1 = 0; iL1 < _polyLineVec.size(); ++iL1 )
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{
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_PolyLine& L1 = _polyLineVec[ iL1 ];
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const _SegmentTree::box_type* boxL1 = L1._segTree->getBox();
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if ( boxL1->IsOut ( pCommOut, pCommIn ))
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continue;
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for ( size_t iLE = 1; iLE < L1._lEdges.size(); ++iLE )
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{
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foundSegs.clear();
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L1._segTree->GetSegmentsNear( segCommon, foundSegs );
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for ( size_t i = 0; i < foundSegs.size(); ++i )
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if ( intersection.Compute( *foundSegs[i], segCommon ) &&
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intersection._param2 > 1e-10 )
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{
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double len2D = intersection._param2 * maxLen2D / ( 2 + L1._advancable );
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if ( len2D < maxLen2D ) {
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maxLen2D = len2D;
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pCommIn = pCommOut + normAvg * maxLen2D; // here length of segCommon changes
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}
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}
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}
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}
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// remove _LayerEdge's intersecting segCommon
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for ( int isR = 0; isR < 2; ++isR ) // loop on [ LL, LR ]
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{
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_PolyLine& L = isR ? LR : LL;
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_PolyLine::TEdgeIterator eIt = isR ? L._lEdges.begin()+1 : L._lEdges.end()-2;
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int dIt = isR ? +1 : -1;
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// at least 2 _LayerEdge's should remain in a _PolyLine (if _advancable)
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if ( L._lEdges.size() < 3 ) continue;
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if ( nbAdvancableL == 1 && L._advancable && normL * normR > -0.01 )
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continue; // obtuse internal angle
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// at least 3 _LayerEdge's should remain in a _PolyLine
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if ( L._lEdges.size() < 4 ) continue;
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size_t iLE = 1;
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_SegmentIntersection lastIntersection;
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for ( ; iLE < L._lEdges.size(); ++iLE, eIt += dIt )
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{
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gp_XY uvIn = eIt->_uvOut + eIt->_normal2D * _thickness * eIt->_len2dTo3dRatio;
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_Segment segOfEdge( eIt->_uvOut, uvIn );
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if ( !intersection.Compute( segCommon, segOfEdge ))
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break;
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lastIntersection._param1 = intersection._param1;
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lastIntersection._param2 = intersection._param2;
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}
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if ( iLE >= L._lEdges.size () - 1 )
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{
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// all _LayerEdge's intersect the segCommon, limit inflation
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// of remaining 2 _LayerEdge's
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vector< _LayerEdge > newEdgeVec( 2 );
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vector< _LayerEdge > newEdgeVec( Min( 3, L._lEdges.size() ));
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newEdgeVec.front() = L._lEdges.front();
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newEdgeVec.back() = L._lEdges.back();
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if ( newEdgeVec.size() == 3 )
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newEdgeVec[1] = L._lEdges[ L._lEdges.size() / 2 ];
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L._lEdges.swap( newEdgeVec );
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if ( !isR ) std::swap( intersection._param1 , intersection._param2 );
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L._lEdges.front()._len2dTo3dRatio *= intersection._param1;
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L._lEdges.back ()._len2dTo3dRatio *= intersection._param2;
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if ( !isR ) std::swap( lastIntersection._param1 , lastIntersection._param2 );
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L._lEdges.front()._len2dTo3dRatio *= lastIntersection._param1; // ??
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L._lEdges.back ()._len2dTo3dRatio *= lastIntersection._param2;
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}
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else if ( iLE != 1 )
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{
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@ -924,7 +976,11 @@ void _ViscousBuilder2D::adjustCommonEdge( _PolyLine& LL, _PolyLine& LR )
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{
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// make that the _LayerEdge at VERTEX is not shared by LL and LR
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_LayerEdge& notSharedEdge = LL._advancable ? LR._lEdges[0] : LL._lEdges.back();
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_LayerEdge& sharedEdge = LR._advancable ? LR._lEdges[0] : LL._lEdges.back();
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notSharedEdge._normal2D.SetCoord( 0.,0. );
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sharedEdge._normal2D = normAvg;
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sharedEdge._isBlocked = false;
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}
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}
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}
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@ -973,7 +1029,7 @@ bool _ViscousBuilder2D::inflate()
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foundSegs.clear();
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L2._segTree->GetSegmentsNear( L1._lEdges[iLE]._ray, foundSegs );
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for ( size_t i = 0; i < foundSegs.size(); ++i )
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if ( ! L1.IsAdjacent( *foundSegs[i] ) &&
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if ( ! L1.IsAdjacent( *foundSegs[i], & L1._lEdges[iLE] ) &&
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intersection.Compute( *foundSegs[i], L1._lEdges[iLE]._ray ))
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{
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double distToL2 = intersection._param2 / L1._lEdges[iLE]._len2dTo3dRatio;
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@ -1049,6 +1105,7 @@ bool _ViscousBuilder2D::fixCollisions()
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_SegmentIntersection intersection;
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list< pair< _LayerEdge*, double > > edgeLenLimitList;
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list< _LayerEdge* > blockedEdgesList;
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for ( size_t iL1 = 0; iL1 < _polyLineVec.size(); ++iL1 )
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{
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@ -1057,16 +1114,15 @@ bool _ViscousBuilder2D::fixCollisions()
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for ( size_t iL2 = 0; iL2 < L1._reachableLines.size(); ++iL2 )
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{
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_PolyLine& L2 = * L1._reachableLines[ iL2 ];
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//for ( size_t iLE = L1.FirstLEdge(); iLE < L1._lEdges.size(); ++iLE )
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for ( size_t iLE = 1; iLE < L1._lEdges.size()-1; ++iLE )
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for ( size_t iLE = L1.FirstLEdge(); iLE < L1._lEdges.size(); ++iLE )
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{
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_LayerEdge& LE1 = L1._lEdges[iLE];
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if ( LE1._isBlocked ) continue;
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//if ( LE1._isBlocked ) continue;
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foundSegs.clear();
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L2._segTree->GetSegmentsNear( LE1._ray, foundSegs );
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for ( size_t i = 0; i < foundSegs.size(); ++i )
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{
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if ( ! L1.IsAdjacent( *foundSegs[i] ) &&
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if ( ! L1.IsAdjacent( *foundSegs[i], &LE1 ) &&
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intersection.Compute( *foundSegs[i], LE1._ray ))
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{
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const double dist2DToL2 = intersection._param2;
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@ -1075,11 +1131,12 @@ bool _ViscousBuilder2D::fixCollisions()
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{
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if ( newLen2D < LE1._length2D )
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{
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blockedEdgesList.push_back( &LE1 );
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if ( L1._advancable )
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{
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edgeLenLimitList.push_back( make_pair( &LE1, newLen2D ));
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L2._lEdges[ foundSegs[i]->_indexInLine ]._isBlocked = true;
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L2._lEdges[ foundSegs[i]->_indexInLine + 1 ]._isBlocked = true;
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blockedEdgesList.push_back( &L2._lEdges[ foundSegs[i]->_indexInLine ]);
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blockedEdgesList.push_back( &L2._lEdges[ foundSegs[i]->_indexInLine + 1 ]);
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}
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else // here dist2DToL2 < 0 and LE1._length2D == 0
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{
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@ -1091,21 +1148,9 @@ bool _ViscousBuilder2D::fixCollisions()
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edgeLenLimitList.push_back( make_pair( &LE2[0], newLen2D ));
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edgeLenLimitList.push_back( make_pair( &LE2[1], newLen2D ));
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LE2[0]._isBlocked = true;
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LE2[1]._isBlocked = true;
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}
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}
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LE1._isBlocked = true; // !! after SetNewLength()
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}
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// else
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// {
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// double step2D = newLen2D - LE1._length2D;
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// double step = step2D / LE1._len2dTo3dRatio;
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// if ( step > maxStep )
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// maxStep = step;
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// if ( step < minStep )
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// minStep = step;
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// }
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}
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}
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}
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@ -1118,8 +1163,15 @@ bool _ViscousBuilder2D::fixCollisions()
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{
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_LayerEdge* LE = edge2Len->first;
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LE->SetNewLength( edge2Len->second / LE->_len2dTo3dRatio );
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LE->_isBlocked = true;
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}
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// block inflation of _LayerEdge's
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list< _LayerEdge* >::iterator edge = blockedEdgesList.begin();
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for ( ; edge != blockedEdgesList.end(); ++edge )
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(*edge)->_isBlocked = true;
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// find a not blocked _LayerEdge
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for ( size_t iL = 0; iL < _polyLineVec.size(); ++iL )
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{
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_PolyLine& L = _polyLineVec[ iL ];
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@ -1150,7 +1202,8 @@ bool _ViscousBuilder2D::shrink()
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_PolyLine& L = _polyLineVec[ iL1 ]; // line with no layers
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if ( L._advancable )
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continue;
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if ( !L._rightLine->_advancable && !L._leftLine->_advancable )
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const int nbAdvancable = ( L._rightLine->_advancable + L._leftLine->_advancable );
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if ( nbAdvancable == 0 )
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continue;
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const TopoDS_Edge& E = L._wire->Edge ( L._edgeInd );
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@ -1275,47 +1328,62 @@ bool _ViscousBuilder2D::shrink()
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double u0 = isR ? ul : uf; // init value of the param to move
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int iPEnd = isR ? nodeDataVec.size() - 1 : 0;
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_LayerEdge& nearLE = isR ? L._lEdges.back() : L._lEdges.front();
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_LayerEdge& farLE = isR ? L._lEdges.front() : L._lEdges.back();
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// try to find length of advancement along L by intersecting L with
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// an adjacent _Segment of L2
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double & length2D = ( isR ? L._lEdges.back() : L._lEdges.front() )._length2D;
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double & length2D = nearLE._length2D;
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sign = ( isR ^ edgeReversed ) ? -1. : 1.;
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pcurve->D1( u, uv, tangent );
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if ( L2->_advancable )
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{
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gp_Ax2d edgeRay( uv, tangent * sign );
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const _Segment& seg2( isR ? L2->_segments.front() : L2->_segments.back() );
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// make an elongated seg2
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gp_XY seg2Vec( seg2.p2() - seg2.p1() );
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gp_XY longSeg2p1 = seg2.p1() - 1000 * seg2Vec;
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gp_XY longSeg2p2 = seg2.p2() + 1000 * seg2Vec;
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_Segment longSeg2( longSeg2p1, longSeg2p2 );
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if ( intersection.Compute( longSeg2, edgeRay )) { // convex VERTEX
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int iFSeg2 = isR ? 0 : L2->_segments.size() - 1;
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int iLSeg2 = isR ? 1 : L2->_segments.size() - 2;
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gp_XY uvLSeg2In = L2->_lEdges[ iLSeg2 ]._uvIn;
|
||||
gp_XY uvLSeg2Out = L2->_lEdges[ iLSeg2 ]._uvOut;
|
||||
gp_XY uvFSeg2Out = L2->_lEdges[ iFSeg2 ]._uvOut;
|
||||
Handle(Geom2d_Line) seg2Line = new Geom2d_Line( uvLSeg2In, uvFSeg2Out - uvLSeg2Out );
|
||||
|
||||
length2D = intersection._param2; /* |L seg2
|
||||
* | o---o---
|
||||
* | / |
|
||||
* |/ | L2
|
||||
* x------x--- */
|
||||
Geom2dAdaptor_Curve edgeCurve( pcurve, Min( uf, ul ), Max( uf, ul ));
|
||||
Geom2dAdaptor_Curve seg2Curve( seg2Line );
|
||||
Geom2dInt_GInter curveInt( edgeCurve, seg2Curve, 1e-7, 1e-7 );
|
||||
double maxDist2d = 2 * L2->_lEdges[ iLSeg2 ]._length2D;
|
||||
if ( curveInt.IsDone() &&
|
||||
!curveInt.IsEmpty() &&
|
||||
curveInt.Point( 1 ).Value().Distance( uvFSeg2Out ) <= maxDist2d )
|
||||
{ /* convex VERTEX */
|
||||
u = curveInt.Point( 1 ).ParamOnFirst(); /* |L seg2
|
||||
* | o---o---
|
||||
* | / |
|
||||
* |/ | L2
|
||||
* x------x--- */
|
||||
}
|
||||
else { /* concave VERTEX */ /* o-----o---
|
||||
* \ |
|
||||
* \ | L2
|
||||
* x--x---
|
||||
* /
|
||||
* L / */
|
||||
length2D = ( isR ? L2->_lEdges.front() : L2->_lEdges.back() )._length2D;
|
||||
else { /* concave VERTEX */ /* o-----o---
|
||||
* \ |
|
||||
* \ | L2
|
||||
* x--x---
|
||||
* /
|
||||
* L / */
|
||||
length2D = sign * L2->_lEdges[ iFSeg2 ]._length2D;
|
||||
}
|
||||
}
|
||||
else // L2 is advancable but in the face adjacent by L
|
||||
{
|
||||
length2D = ( isR ? L._lEdges.front() : L._lEdges.back() )._length2D;
|
||||
length2D = farLE._length2D;
|
||||
if ( length2D == 0 )
|
||||
length2D = ( isR ? L._leftLine->_lEdges.back() : L._rightLine->_lEdges.front() )._length2D;
|
||||
}
|
||||
// move u to the internal boundary of layers
|
||||
u += length2D * sign;
|
||||
if ( length2D > 0 ) {
|
||||
// move u to the internal boundary of layers
|
||||
double maxLen3D = Min( _thickness, edgeLen / ( 1 + nbAdvancable ));
|
||||
double maxLen2D = maxLen3D * nearLE._len2dTo3dRatio;
|
||||
if ( length2D > maxLen2D )
|
||||
length2D = maxLen2D;
|
||||
u += length2D * sign;
|
||||
}
|
||||
nodeDataVec[ iPEnd ].param = u;
|
||||
|
||||
gp_Pnt2d newUV = pcurve->Value( u );
|
||||
@ -1510,7 +1578,7 @@ bool _ViscousBuilder2D::refine()
|
||||
|
||||
//if ( L._leftLine->_advancable ) L._lEdges[0] = L._leftLine->_lEdges.back();
|
||||
|
||||
// calculate intermediate UV on _LayerEdge's ( _LayerEdge::_uvRefined )
|
||||
// replace an inactive _LayerEdge with an active one of a neighbour _PolyLine
|
||||
size_t iLE = 0, nbLE = L._lEdges.size();
|
||||
if ( /*!L._leftLine->_advancable &&*/ L.IsCommonEdgeShared( *L._leftLine ))
|
||||
{
|
||||
@ -1522,6 +1590,34 @@ bool _ViscousBuilder2D::refine()
|
||||
L._lEdges.back() = L._rightLine->_lEdges[0];
|
||||
--nbLE;
|
||||
}
|
||||
|
||||
// remove intersecting _LayerEdge's
|
||||
_SegmentIntersection intersection;
|
||||
for ( int isR = 0; ( isR < 2 && L._lEdges.size() > 2 ); ++isR )
|
||||
{
|
||||
int nbRemove = 0, deltaIt = isR ? -1 : +1;
|
||||
_PolyLine::TEdgeIterator eIt = isR ? L._lEdges.end()-1 : L._lEdges.begin();
|
||||
// HEURISTICS !!! elongate the first _LayerEdge
|
||||
gp_XY newIn = eIt->_uvOut + eIt->_normal2D * eIt->_length2D/* * 2*/;
|
||||
_Segment seg1( eIt->_uvOut, newIn );
|
||||
for ( eIt += deltaIt; nbRemove < L._lEdges.size()-2; eIt += deltaIt )
|
||||
{
|
||||
_Segment seg2( eIt->_uvOut, eIt->_uvIn );
|
||||
if ( !intersection.Compute( seg1, seg2 ))
|
||||
break;
|
||||
++nbRemove;
|
||||
}
|
||||
if ( nbRemove > 0 ) {
|
||||
if ( isR )
|
||||
L._lEdges.erase( L._lEdges.end()-nbRemove-1,
|
||||
L._lEdges.end()-nbRemove );
|
||||
else
|
||||
L._lEdges.erase( L._lEdges.begin()+2,
|
||||
L._lEdges.begin()+2+nbRemove );
|
||||
}
|
||||
}
|
||||
|
||||
// calculate intermediate UV on _LayerEdge's ( _LayerEdge::_uvRefined )
|
||||
for ( ; iLE < nbLE; ++iLE )
|
||||
{
|
||||
_LayerEdge& LE = L._lEdges[iLE];
|
||||
|
||||
Loading…
Reference in New Issue
Block a user