From 43cfddbeaa6cfcae89fb3e8a19dc1e94128e3665 Mon Sep 17 00:00:00 2001 From: eap Date: Fri, 19 Mar 2010 14:21:48 +0000 Subject: [PATCH] 0020771: EDF 1322 SMESH : Quadratic/Linear conversion with Medium Nodes on Geometry issue * Care of period when performing operations on points in parametric space --- src/SMESH/SMESH_MesherHelper.cxx | 116 ++++++++++++++++++++----------- 1 file changed, 75 insertions(+), 41 deletions(-) diff --git a/src/SMESH/SMESH_MesherHelper.cxx b/src/SMESH/SMESH_MesherHelper.cxx index 3fca0e451..3c92c01f1 100644 --- a/src/SMESH/SMESH_MesherHelper.cxx +++ b/src/SMESH/SMESH_MesherHelper.cxx @@ -490,6 +490,62 @@ bool SMESH_MesherHelper::CheckNodeUV(const TopoDS_Face& F, return true; } +namespace +{ + struct TMiddle + { + gp_XY operator()(const gp_XY& uv1, const gp_XY& uv2) const { return ( uv1 + uv2 ) / 2.; } + }; + struct TAdd + { + gp_XY operator()(const gp_XY& uv1, const gp_XY& uv2) const { return ( uv1 + uv2 ); } + }; + struct TSubtract + { + gp_XY operator()(const gp_XY& uv1, const gp_XY& uv2) const { return ( uv1 - uv2 ); } + }; + + //================================================================================ + /*! + * \brief Perform given operation on two points in parametric space of given surface + * Example: gp_XY uvSum = applyXYFUN( surf, uv1, uv2, gp_XYFun(Added)) + */ + //================================================================================ + + template + gp_XY applyFunc(const Handle(Geom_Surface)& surface, + const gp_XY& uv1, + gp_XY uv2, + const bool resultInPeriod=true) + { + Standard_Boolean isUPeriodic = surface.IsNull() ? false : surface->IsUPeriodic(); + Standard_Boolean isVPeriodic = surface.IsNull() ? false : surface->IsVPeriodic(); + if ( !isUPeriodic && !isVPeriodic ) + return FUNC()(uv1,uv2); + + // move uv2 not far than half-period from uv1 + if ( isUPeriodic ) + uv2.SetX( uv2.X()+ShapeAnalysis::AdjustByPeriod(uv2.X(),uv1.X(),surface->UPeriod()) ); + if ( isVPeriodic ) + uv2.SetY( uv2.Y()+ShapeAnalysis::AdjustByPeriod(uv2.Y(),uv1.Y(),surface->VPeriod()) ); + + // execute operation + gp_XY res = FUNC()(uv1,uv2); + + // move result within period + if ( resultInPeriod ) + { + Standard_Real UF,UL,VF,VL; + surface->Bounds(UF,UL,VF,VL); + if ( isUPeriodic ) + res.SetX( res.X() + ShapeAnalysis::AdjustToPeriod(res.X(),UF,UL)); + if ( isVPeriodic ) + res.SetY( res.Y() + ShapeAnalysis::AdjustToPeriod(res.Y(),VF,VL)); + } + + return res; + } +} //======================================================================= //function : GetMiddleUV //purpose : Return middle UV taking in account surface period @@ -499,34 +555,7 @@ gp_XY SMESH_MesherHelper::GetMiddleUV(const Handle(Geom_Surface)& surface, const gp_XY& p1, const gp_XY& p2) { - if ( surface.IsNull() ) - return 0.5 * ( p1 + p2 ); - //checking if surface is periodic - Standard_Real UF,UL,VF,VL; - surface->Bounds(UF,UL,VF,VL); - - Standard_Real u,v; - Standard_Boolean isUPeriodic = surface->IsUPeriodic(); - if(isUPeriodic) { - Standard_Real UPeriod = surface->UPeriod(); - Standard_Real p2x = p2.X()+ShapeAnalysis::AdjustByPeriod(p2.X(),p1.X(),UPeriod); - Standard_Real pmid = (p1.X()+p2x)/2.; - u = pmid+ShapeAnalysis::AdjustToPeriod(pmid,UF,UL); - } - else { - u= (p1.X()+p2.X())/2.; - } - Standard_Boolean isVPeriodic = surface->IsVPeriodic(); - if(isVPeriodic) { - Standard_Real VPeriod = surface->VPeriod(); - Standard_Real p2y = p2.Y()+ShapeAnalysis::AdjustByPeriod(p2.Y(),p1.Y(),VPeriod); - Standard_Real pmid = (p1.Y()+p2y)/2.; - v = pmid+ShapeAnalysis::AdjustToPeriod(pmid,VF,VL); - } - else { - v = (p1.Y()+p2.Y())/2.; - } - return gp_XY( u,v ); + return applyFunc( surface, p1, p2 ); } //======================================================================= @@ -2471,7 +2500,7 @@ void SMESH_MesherHelper::FixQuadraticElements(bool volumeOnly) // not treat boundary of volumic submesh int isInside = ( elemType == SMDSAbs_Volume && volumeOnly ) ? 1 : 0; for ( ; isInside < 2; ++isInside ) { - MSG( "--------------- LOOP " << isInside << " ------------------"); + MSG( "--------------- LOOP (inside=" << isInside << ") ------------------"); SMDS_TypeOfPosition pos = isInside ? SMDS_TOP_3DSPACE : SMDS_TOP_FACE; for ( pFace = faces.begin(); pFace != faces.end(); ++pFace ) { @@ -2488,18 +2517,18 @@ void SMESH_MesherHelper::FixQuadraticElements(bool volumeOnly) if ( !pFace->GetLinkChain( dir+2, rawChain, pos, error ) && error ==ERR_UNKNOWN ) continue; vector< TChain > chains; - if ( error == ERR_OK ) { // chains contains continues rectangles + if ( error == ERR_OK ) { // chain contains continues rectangles chains.resize(1); chains[0].splice( chains[0].begin(), rawChain ); } - else if ( error == ERR_TRI ) { // chains contains continues triangles + else if ( error == ERR_TRI ) { // chain contains continues triangles TSplitTriaResult res = splitTrianglesIntoChains( rawChain, chains, pos ); - if ( res != _OK ) { // not rectangles split into triangles + if ( res != _OK ) { // not quadrangles split into triangles fixTriaNearBoundary( rawChain, *this ); break; } } - else if ( error == ERR_PRISM ) { // side faces of prisms + else if ( error == ERR_PRISM ) { // quadrangle side faces of prisms fixPrism( rawChain ); break; } @@ -2544,16 +2573,20 @@ void SMESH_MesherHelper::FixQuadraticElements(bool volumeOnly) // compute node displacement of end links in parametric space of face const SMDS_MeshNode* nodeOnFace = (*(++chain.begin()))->_mediumNode; TopoDS_Shape f = GetSubShapeByNode( nodeOnFace, GetMeshDS() ); - if ( !f.IsNull() && f.ShapeType() == TopAbs_FACE ) { + if ( !f.IsNull() && f.ShapeType() == TopAbs_FACE ) + { face = TopoDS::Face( f ); - for ( int is1 = 0; is1 < 2; ++is1 ) { // move0 or move1 + Handle(Geom_Surface) surf = BRep_Tool::Surface(face,loc); + for ( int is1 = 0; is1 < 2; ++is1 ) // move0 or move1 + { TChainLink& link = is1 ? chain.back() : chain.front(); + gp_XY uvm = GetNodeUV( face, link->_mediumNode, nodeOnFace, &checkUV); gp_XY uv1 = GetNodeUV( face, link->node1(), nodeOnFace, &checkUV); gp_XY uv2 = GetNodeUV( face, link->node2(), nodeOnFace, &checkUV); - gp_XY uvm = GetNodeUV( face, link->_mediumNode, nodeOnFace, &checkUV); - gp_XY uvMove = uvm - GetMiddleUV( BRep_Tool::Surface(face,loc), uv1, uv2); - if ( is1 ) move1.SetCoord( uvMove.X(), uvMove.Y(), 0 ); - else move0.SetCoord( uvMove.X(), uvMove.Y(), 0 ); + gp_XY uv12 = GetMiddleUV( surf, uv1, uv2); + // uvMove = uvm - uv12 + gp_XY uvMove = applyFunc(surf, uvm, uv12,/*inPeriod=*/false); + ( is1 ? move1 : move0 ).SetCoord( uvMove.X(), uvMove.Y(), 0 ); } if ( move0.SquareMagnitude() < straightTol2 && move1.SquareMagnitude() < straightTol2 ) { @@ -2598,9 +2631,10 @@ void SMESH_MesherHelper::FixQuadraticElements(bool volumeOnly) } else { // compute 3D displacement by 2D one + Handle(Geom_Surface) s = BRep_Tool::Surface(face,loc); gp_XY oldUV = GetNodeUV( face, (*link1)->_mediumNode, 0, &checkUV); - gp_XY newUV = oldUV + gp_XY( move.X(), move.Y() ); - gp_Pnt newPnt = BRep_Tool::Surface(face,loc)->Value( newUV.X(), newUV.Y()); + gp_XY newUV = applyFunc( s, oldUV, gp_XY( move.X(),move.Y() )); + gp_Pnt newPnt = s->Value( newUV.X(), newUV.Y()); move = gp_Vec( XYZ((*link1)->_mediumNode), newPnt.Transformed(loc) ); #ifdef _DEBUG_ if ( (XYZ((*link1)->node1()) - XYZ((*link1)->node2())).SquareModulus() < -- 2.39.2