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0022620: [CEA 1061] Remove points on colinear edges of a face's wire.

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skv 2014-08-19 14:52:23 +04:00
parent ccf1c3dfbc
commit 5c9b06b29d
1 changed files with 306 additions and 229 deletions
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535
src/BlockFix/BlockFix_UnionEdges.cxx
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@ -30,7 +30,6 @@
#include <ShapeBuild_ReShape.hxx>
#include <ShapeFix_Edge.hxx>
#include <ShapeFix_Face.hxx>
#include <ShapeFix_Shell.hxx>
@ -39,16 +38,16 @@
#include <BRep_ListIteratorOfListOfCurveRepresentation.hxx>
#include <BRep_TEdge.hxx>
#include <BRep_Tool.hxx>
#include <BRepAdaptor_HCompCurve.hxx>
#include <BRepLib.hxx>
#include <BRepLib_MakeEdge.hxx>
#include <BRepTools_WireExplorer.hxx>
#include <TopExp.hxx>
#include <TopExp_Explorer.hxx>
#include <TopTools_IndexedDataMapOfShapeListOfShape.hxx>
#include <TopTools_IndexedMapOfShape.hxx>
#include <TopTools_ListOfShape.hxx>
#include <TopTools_MapIteratorOfMapOfShape.hxx>
#include <TopTools_MapOfShape.hxx>
#include <TopTools_ListIteratorOfListOfShape.hxx>
#include <TopTools_SequenceOfShape.hxx>
@ -57,15 +56,12 @@
#include <TopoDS_Edge.hxx>
#include <TopoDS_Face.hxx>
#include <TopoDS_Shell.hxx>
#include <TopoDS_Solid.hxx>
#include <TopoDS_Vertex.hxx>
#include <TopoDS_Iterator.hxx>
#include <TopoDS_Shape.hxx>
#include <Approx_Curve3d.hxx>
#include <GC_MakeCircle.hxx>
#include <Geom_BezierCurve.hxx>
#include <Geom_BSplineCurve.hxx>
#include <Geom_Circle.hxx>
#include <Geom_Curve.hxx>
@ -85,12 +81,144 @@
#include <TColGeom2d_Array1OfBSplineCurve.hxx>
#include <TColGeom2d_HArray1OfBSplineCurve.hxx>
#include <TColGeom2d_SequenceOfBoundedCurve.hxx>
#include <TColgp_SequenceOfPnt.hxx>
#include <TColStd_Array1OfReal.hxx>
#include <TColStd_ListIteratorOfListOfInteger.hxx>
#include <TColStd_ListOfInteger.hxx>
#include <TColStd_MapOfInteger.hxx>
#include "utilities.h"
//=======================================================================
//function : IsToMerge
//purpose : This method return Standard_True if two consequent edges can
// be merged. The edges can be merged if:
// 1. They belong to same faces.
// 2. They either both seam or both not seam on each face.
// 3. They are based on coincident lines, or:
// 4. They are based on coincident circles, or:
// 5. They are based on either Bezier of BSplines.
//=======================================================================
static Standard_Boolean IsToMerge
(const TopoDS_Edge &theEdge1,
const TopoDS_Edge &theEdge2,
const TopTools_IndexedDataMapOfShapeListOfShape &theMapEdgeFaces,
const Standard_Real theTolerance)
{
Standard_Boolean aResult = Standard_False;
Standard_Boolean isDegen1 = BRep_Tool::Degenerated(theEdge1);
Standard_Boolean isDegen2 = BRep_Tool::Degenerated(theEdge2);
Standard_Boolean isCompareGeom = Standard_False;
if (isDegen1 && isDegen2) {
// Both of edges are degenerated.
aResult = Standard_True;
} else if (!isDegen1 && !isDegen2) {
// Both of edges are not degenerated.
// Check if they belong to the same faces.
Standard_Boolean isSame = Standard_False;
Standard_Boolean has1 = theMapEdgeFaces.Contains(theEdge1);
Standard_Boolean has2 = theMapEdgeFaces.Contains(theEdge1);
if (has1 && has2) {
const TopTools_ListOfShape &aLst1 = theMapEdgeFaces.FindFromKey(theEdge1);
const TopTools_ListOfShape &aLst2 = theMapEdgeFaces.FindFromKey(theEdge2);
if (aLst1.Extent() == aLst2.Extent()) {
TopTools_ListIteratorOfListOfShape anIter1(aLst1);
isSame = Standard_True;
for (; anIter1.More(); anIter1.Next()) {
TopoDS_Face aFace1 = TopoDS::Face(anIter1.Value());
TopTools_ListIteratorOfListOfShape anIter2(aLst2);
for (; anIter2.More(); anIter2.Next()) {
if (aFace1.IsSame(anIter2.Value())) {
// Same face is detected. Break the loop.
// Check if edges either both seam or both not seam on this face.
Standard_Boolean isSeam1 = BRep_Tool::IsClosed(theEdge1, aFace1);
Standard_Boolean isSeam2 = BRep_Tool::IsClosed(theEdge2, aFace1);
isSame = (isSeam1 && isSeam2) || (isSeam1 == isSeam2);
break;
}
}
if (isSame && !anIter2.More()) {
// No same face is detected. Break the loop.
isSame = Standard_False;
break;
}
}
}
} else {
isSame = (has1 == has2); // True if the both of has are negative.
}
if (isSame) {
// Check edges geometry.
Standard_Real aFP1;
Standard_Real aFP2;
Standard_Real aLP1;
Standard_Real aLP2;
Handle(Geom_Curve) aC3d1 = BRep_Tool::Curve(theEdge1, aFP1, aLP1);
Handle(Geom_Curve) aC3d2 = BRep_Tool::Curve(theEdge2, aFP2, aLP2);
if (aC3d1.IsNull() == Standard_False &&
aC3d2.IsNull() == Standard_False) {
// Get the basis curves.
while(aC3d1->IsKind(STANDARD_TYPE(Geom_TrimmedCurve))) {
Handle(Geom_TrimmedCurve) aTc =
Handle(Geom_TrimmedCurve)::DownCast(aC3d1);
aC3d1 = aTc->BasisCurve();
}
while(aC3d2->IsKind(STANDARD_TYPE(Geom_TrimmedCurve))) {
Handle(Geom_TrimmedCurve) aTc =
Handle(Geom_TrimmedCurve)::DownCast(aC3d2);
aC3d2 = aTc->BasisCurve();
}
if(aC3d1->IsKind(STANDARD_TYPE(Geom_Line)) &&
aC3d2->IsKind(STANDARD_TYPE(Geom_Line))) {
// Two curves are lines.
Handle(Geom_Line) aL1 = Handle(Geom_Line)::DownCast(aC3d1);
Handle(Geom_Line) aL2 = Handle(Geom_Line)::DownCast(aC3d2);
gp_Dir aDir1 = aL1->Position().Direction();
gp_Dir aDir2 = aL2->Position().Direction();
if(aDir1.IsParallel(aDir2, theTolerance)) {
// Two coincident lines.
aResult = Standard_True;
}
} else if(aC3d1->IsKind(STANDARD_TYPE(Geom_Circle)) &&
aC3d2->IsKind(STANDARD_TYPE(Geom_Circle))) {
// Two curves are circles.
Handle(Geom_Circle) aC1 = Handle(Geom_Circle)::DownCast(aC3d1);
Handle(Geom_Circle) aC2 = Handle(Geom_Circle)::DownCast(aC3d2);
gp_Pnt aP01 = aC1->Location();
gp_Pnt aP02 = aC2->Location();
if (aP01.Distance(aP02) <= Precision::Confusion()) {
// Two coincident circles.
aResult = Standard_True;
}
} else if (aC3d1->IsKind(STANDARD_TYPE(Geom_BSplineCurve)) ||
aC3d1->IsKind(STANDARD_TYPE(Geom_BezierCurve))) {
if (aC3d2->IsKind(STANDARD_TYPE(Geom_BSplineCurve)) ||
aC3d2->IsKind(STANDARD_TYPE(Geom_BezierCurve))) {
// Both of the curves are either bezier or BSplines.
aResult = Standard_True;
}
}
}
}
}
return aResult;
}
//=======================================================================
//function : BlockFix_UnionEdges()
//purpose : Constructor
@ -263,55 +391,11 @@ static TopoDS_Edge GlueEdgesWithPCurves(const TopTools_SequenceOfShape& aChain,
return ResEdge;
}
//=======================================================================
//function : IsFixed
//purpose : Returns true if this vertex should be kept in the result.
//=======================================================================
static Standard_Boolean IsFixed
(const TopoDS_Vertex &theVtx,
const TopoDS_Face &theFace,
const TopTools_IndexedDataMapOfShapeListOfShape &theMapVtxEdgeOnFace)
{
Standard_Boolean aResult = Standard_False;
if (theMapVtxEdgeOnFace.Contains(theVtx)) {
const TopTools_ListOfShape& aList = theMapVtxEdgeOnFace.FindFromKey(theVtx);
TopTools_ListIteratorOfListOfShape anIter(aList);
Standard_Boolean isFirst = Standard_True;
Standard_Boolean isSeam = Standard_False;
for ( ; anIter.More(); anIter.Next()) {
TopoDS_Edge anEdge = TopoDS::Edge(anIter.Value());
if (isFirst) {
// This is the first treated edge.
isFirst = Standard_False;
isSeam = BRep_Tool::IsClosed(anEdge, theFace);
} else if (BRep_Tool::IsClosed(anEdge, theFace)) {
// Seam edge.
if (!isSeam) {
// The previous one was not seam.
aResult = Standard_True;
break;
}
} else if (isSeam) {
// This is not a seam edge however the previous one was seam.
aResult = Standard_True;
break;
}
}
}
return aResult;
}
//=======================================================================
//function : MergeEdges
//purpose : auxilary
//=======================================================================
static Standard_Boolean MergeEdges(const TopTools_SequenceOfShape& SeqEdges,
const TopoDS_Face& theFace1,
const TopoDS_Face& theFace2,
const Standard_Real Tol,
TopoDS_Edge& anEdge)
{
@ -352,61 +436,6 @@ static Standard_Boolean MergeEdges(const TopTools_SequenceOfShape& SeqEdges,
return Standard_False;
}
// Check if there are vertices that should be kept in the result.
const Standard_Boolean isClosed = VF.IsSame(VL);
TopTools_IndexedDataMapOfShapeListOfShape theMapVtxEdge1;
TopTools_IndexedDataMapOfShapeListOfShape theMapVtxEdge2;
Standard_Integer jSplit = -1;
TopExp::MapShapesAndAncestors(theFace1, TopAbs_VERTEX, TopAbs_EDGE, theMapVtxEdge1);
TopExp::MapShapesAndAncestors(theFace2, TopAbs_VERTEX, TopAbs_EDGE, theMapVtxEdge2);
// Check if intermediate vertices should be in the result.
for(j = 1; j < aChain.Length(); j++) {
TopoDS_Edge anEdge = TopoDS::Edge(aChain.Value(j));
TopoDS_Vertex aVtx = sae.LastVertex(anEdge);
if (IsFixed(aVtx, theFace1, theMapVtxEdge1) ||
IsFixed(aVtx, theFace2, theMapVtxEdge2)) {
// This vertex should be kept.
if (jSplit > 0) {
// There is already split vertex detected.
// It means that these edges can't be merged.
MESSAGE ("Two edges on closed contour can't be merged.");
return Standard_False;
} else if (isClosed) {
// This is a closed contour.
// It is possible to merge it starting from the next edge.
jSplit = j;
} else {
// The contour is not closed, this vertex sould be kept.
// It means that these edges can't be merged.
MESSAGE ("Two edges on not closed contour can't be merged.");
return Standard_False;
}
}
}
if (jSplit > 0) {
// This is closed contour. Check the last (it is first as well) vertex,
// as it becomes intermediate after reordering.
TopoDS_Edge anEdge = TopoDS::Edge(aChain.Last());
TopoDS_Vertex aVtx = sae.LastVertex(anEdge);
if (IsFixed(aVtx, theFace1, theMapVtxEdge1) ||
IsFixed(aVtx, theFace2, theMapVtxEdge2)) {
// This vertex should be kept. So we can't merge this contour.
MESSAGE ("Two edges on closed contour can't be merged.");
return Standard_False;
}
// Reorder edges in the sequence to have jSplit-th edge last.
for(j = 1; j <= jSplit; j++) {
aChain.Append(aChain.First());
aChain.Remove(1);
}
}
// union edges in chain
// first step: union lines and circles
TopLoc_Location Loc;
@ -453,9 +482,6 @@ static Standard_Boolean MergeEdges(const TopTools_SequenceOfShape& SeqEdges,
B.Add (E,V1); B.Add (E,V2);
B.UpdateVertex(V1, 0., E, 0.);
B.UpdateVertex(V2, dist, E, 0.);
//ShapeFix_Edge sfe;
//sfe.FixAddPCurve(E,aFace,Standard_False);
//sfe.FixSameParameter(E);
aChain.Remove(j);
aChain.SetValue(j,E);
j--;
@ -555,21 +581,6 @@ static Standard_Boolean MergeEdges(const TopTools_SequenceOfShape& SeqEdges,
if(NeedUnion) {
MESSAGE ("can not make analitical union => make approximation");
TopoDS_Edge E = GlueEdgesWithPCurves(aChain, VF, VL);
/*
TopoDS_Wire W;
B.MakeWire(W);
for(j=1; j<=aChain.Length(); j++) {
TopoDS_Edge edge = TopoDS::Edge(aChain.Value(j));
B.Add(W,edge);
}
Handle(BRepAdaptor_HCompCurve) Adapt = new BRepAdaptor_HCompCurve(W);
Approx_Curve3d Conv(Adapt,Tol,GeomAbs_C1,9,1000);
Handle(Geom_BSplineCurve) bc = Conv.Curve();
TopoDS_Edge E;
B.MakeEdge (E,bc,Precision::Confusion());
B.Add (E,VF);
B.Add (E,VL);
*/
aChain.SetValue(1,E);
}
else {
@ -586,120 +597,186 @@ static Standard_Boolean MergeEdges(const TopTools_SequenceOfShape& SeqEdges,
//function : Perform
//purpose :
//=======================================================================
TopoDS_Shape BlockFix_UnionEdges::Perform(const TopoDS_Shape& Shape,
const Standard_Real Tol)
TopoDS_Shape BlockFix_UnionEdges::Perform(const TopoDS_Shape& theShape,
const Standard_Real theTol)
{
myContext = new ShapeBuild_ReShape;
myTolerance = Tol;
TopoDS_Shape aResult = myContext->Apply(Shape);
// Fill Map of edges as keys and list of faces as items.
TopTools_IndexedDataMapOfShapeListOfShape aMapEdgeFaces;
Standard_Boolean isModified = Standard_False;
// processing each solid
TopAbs_ShapeEnum aType = TopAbs_SOLID;
TopExp_Explorer exps (Shape, aType);
if (!exps.More()) {
aType = TopAbs_SHELL;
exps.Init(Shape, aType);
TopExp::MapShapesAndAncestors
(theShape, TopAbs_EDGE, TopAbs_FACE, aMapEdgeFaces);
// processing each face
Handle(ShapeBuild_ReShape) aContext = new ShapeBuild_ReShape;
TopTools_MapOfShape aProcessed;
TopTools_MapOfShape aModifiedFaces;
TopExp_Explorer anExpF(theShape, TopAbs_FACE);
for (; anExpF.More(); anExpF.Next()) {
// Processing of each wire of the face
TopoDS_Face aFace = TopoDS::Face(anExpF.Current());
if (!aProcessed.Add(aFace)) {
continue;
}
TopExp_Explorer anExpW(aFace, TopAbs_WIRE);
for (; anExpW.More(); anExpW.Next()) {
// Get the ordered list of edges in the wire.
TopoDS_Wire aWire = TopoDS::Wire(anExpW.Current());
BRepTools_WireExplorer aWExp(aWire, aFace);
TopTools_ListOfShape aChainEdges;
Standard_Integer aNbEdges = 0;
for (; aWExp.More(); aWExp.Next(), aNbEdges++) {
aChainEdges.Append(aWExp.Current());
}
if (aNbEdges < 2) {
// Nothing to merge.
continue;
}
// Fill the list of flags that neighbour edges can be merged.
TColStd_ListOfInteger aChainCanMerged;
TopoDS_Edge anEdge1 = TopoDS::Edge(aChainEdges.Last());
TopoDS_Edge anEdge2;
Standard_Boolean isToMerge;
TopTools_ListIteratorOfListOfShape anIter(aChainEdges);
Standard_Boolean isFirstMerge = Standard_False;
Standard_Boolean isFirst = Standard_True;
Standard_Boolean isReorder = Standard_False;
// The first element is the flag between last and first edges.
for (; anIter.More(); anIter.Next()) {
anEdge2 = TopoDS::Edge(anIter.Value());
if (aProcessed.Contains(anEdge1) || aProcessed.Contains(anEdge2)) {
// No need to merge already processed edges.
isToMerge = Standard_False;
} else {
isToMerge = IsToMerge(anEdge1, anEdge2, aMapEdgeFaces, theTol);
}
aChainCanMerged.Append(isToMerge);
anEdge1 = anEdge2;
if (isFirst) {
isFirstMerge = isToMerge;
isFirst = Standard_False;
} else if (isFirstMerge && !isToMerge) {
isReorder = Standard_True;
}
}
// Fill the map of processed shape by the edges.
for (anIter.Initialize(aChainEdges); anIter.More(); anIter.Next()) {
aProcessed.Add(anIter.Value());
}
// Reorder edges in the chain.
if (isReorder) {
// Find the first edge that can't be merged.
while (aChainCanMerged.First()) {
TopoDS_Shape aTmpShape = aChainEdges.First();
isToMerge = aChainCanMerged.First();
aChainCanMerged.RemoveFirst();
aChainCanMerged.Append(isToMerge);
aChainEdges.RemoveFirst();
aChainEdges.Append(aTmpShape);
}
}
// Merge parts of chain to be merged.
TColStd_ListIteratorOfListOfInteger aFlagIter(aChainCanMerged);
anIter.Initialize(aChainEdges);
while (anIter.More()) {
TopTools_SequenceOfShape aSeqEdges;
aSeqEdges.Append(anIter.Value());
aFlagIter.Next();
anIter.Next();
for (; anIter.More(); anIter.Next(), aFlagIter.Next()) {
if (aFlagIter.Value()) {
// Continue the chain.
aSeqEdges.Append(anIter.Value());
} else {
// Stop the chain.
break;
}
}
const Standard_Integer aNbEdges = aSeqEdges.Length();
if (aNbEdges > 1) {
// There are several edges to be merged.
TopoDS_Edge aMergedEdge;
if (MergeEdges(aSeqEdges, theTol, aMergedEdge)) {
isModified = Standard_True;
// now we have only one edge - aMergedEdge.
// we have to replace old ListEdges with this new edge
const TopoDS_Shape &anEdge = aSeqEdges.Value(1);
aContext->Replace(anEdge, aMergedEdge);
for (Standard_Integer j = 2; j <= aNbEdges; j++) {
aContext->Remove(aSeqEdges(j));
}
// Fix affected faces.
if (aMapEdgeFaces.Contains(anEdge)) {
const TopTools_ListOfShape &aList =
aMapEdgeFaces.FindFromKey(anEdge);
TopTools_ListIteratorOfListOfShape anIter(aList);
for (; anIter.More(); anIter.Next()) {
aModifiedFaces.Add(anIter.Value());
}
}
}
}
}
}
}
for (; exps.More(); exps.Next()) {
//TopoDS_Solid aSolid = TopoDS::Solid(exps.Current());
TopoDS_Shape aSolid = exps.Current();
TopTools_IndexedMapOfShape ChangedFaces;
if (isModified) {
// Fix modified faces.
TopTools_MapIteratorOfMapOfShape aModifIt(aModifiedFaces);
// creating map of edge faces
TopTools_IndexedDataMapOfShapeListOfShape aMapEdgeFaces;
TopExp::MapShapesAndAncestors(aSolid, TopAbs_EDGE, TopAbs_FACE, aMapEdgeFaces);
for (; aModifIt.More(); aModifIt.Next()) {
TopoDS_Face aModifiedFace =
TopoDS::Face(aContext->Apply(aModifIt.Key()));
Handle(ShapeFix_Face) aSff = new ShapeFix_Face(aModifiedFace);
Handle(ShapeBuild_ReShape) aContext = new ShapeBuild_ReShape;
TopoDS_Shape aRes = aSolid;
aRes = aContext->Apply(aSolid);
// processing each face
TopExp_Explorer exp;
for (exp.Init(aRes, TopAbs_FACE); exp.More(); exp.Next()) {
TopoDS_Face aFace =
TopoDS::Face(aContext->Apply(exp.Current().Oriented(TopAbs_FORWARD)));
TopTools_IndexedDataMapOfShapeListOfShape aMapFacesEdges;
for (TopExp_Explorer expe(aFace,TopAbs_EDGE); expe.More(); expe.Next()) {
TopoDS_Edge edge = TopoDS::Edge(expe.Current());
if (!aMapEdgeFaces.Contains(edge)) continue;
const TopTools_ListOfShape& aList = aMapEdgeFaces.FindFromKey(edge);
TopTools_ListIteratorOfListOfShape anIter(aList);
for ( ; anIter.More(); anIter.Next()) {
TopoDS_Face face = TopoDS::Face(anIter.Value());
TopoDS_Face face1 = TopoDS::Face(aContext->Apply(anIter.Value()));
if (face1.IsSame(aFace)) continue;
if (aMapFacesEdges.Contains(face)) {
aMapFacesEdges.ChangeFromKey(face).Append(edge);
}
else {
TopTools_ListOfShape ListEdges;
ListEdges.Append(edge);
aMapFacesEdges.Add(face,ListEdges);
}
}
}
for (Standard_Integer i=1; i<=aMapFacesEdges.Extent(); i++) {
const TopTools_ListOfShape& ListEdges = aMapFacesEdges.FindFromIndex(i);
TopTools_SequenceOfShape SeqEdges;
TopTools_ListIteratorOfListOfShape anIter(ListEdges);
for ( ; anIter.More(); anIter.Next()) {
SeqEdges.Append(anIter.Value());
}
if (SeqEdges.Length()==1) continue;
TopoDS_Face aFace2 =
TopoDS::Face(aContext->Apply(aMapFacesEdges.FindKey(i)));
TopoDS_Edge E;
if ( MergeEdges(SeqEdges,aFace,aFace2,Tol,E) ) {
// now we have only one edge - aChain.Value(1)
// we have to replace old ListEdges with this new edge
aContext->Replace(SeqEdges(1),E);
for (Standard_Integer j=2; j<=SeqEdges.Length(); j++) {
aContext->Remove(SeqEdges(j));
}
TopoDS_Face tmpF = TopoDS::Face(exp.Current());
if ( !ChangedFaces.Contains(tmpF) )
ChangedFaces.Add(tmpF);
tmpF = TopoDS::Face(aMapFacesEdges.FindKey(i));
if ( !ChangedFaces.Contains(tmpF) )
ChangedFaces.Add(tmpF);
}
}
} // end processing each face
// fix changed faces and replace them in the local context
for (Standard_Integer i=1; i<=ChangedFaces.Extent(); i++) {
TopoDS_Face aFace = TopoDS::Face(aContext->Apply(ChangedFaces.FindKey(i)));
Handle(ShapeFix_Face) sff = new ShapeFix_Face(aFace);
sff->SetContext(myContext);
sff->SetPrecision(myTolerance);
sff->SetMinTolerance(myTolerance);
sff->SetMaxTolerance(Max(1.,myTolerance*1000.));
sff->Perform();
aContext->Replace(aFace,sff->Face());
aSff->SetContext(aContext);
aSff->SetPrecision(theTol);
aSff->SetMinTolerance(theTol);
aSff->SetMaxTolerance(Max(1., theTol*1000.));
aSff->Perform();
aContext->Replace(aModifiedFace, aSff->Face());
}
if (ChangedFaces.Extent() > 0) {
// fix changed shell and replace it in the local context
TopoDS_Shape aRes1 = aContext->Apply(aRes);
TopExp_Explorer expsh;
for (expsh.Init(aRes1, TopAbs_SHELL); expsh.More(); expsh.Next()) {
TopoDS_Shell aShell = TopoDS::Shell(expsh.Current());
Handle(ShapeFix_Shell) sfsh = new ShapeFix_Shell;
sfsh->FixFaceOrientation(aShell);
aContext->Replace(aShell,sfsh->Shell());
}
TopoDS_Shape aRes2 = aContext->Apply(aRes1);
// put new solid into global context
myContext->Replace(aSolid,aRes2);
// Check if the result shape contains shells.
// If yes, fix the faces orientation in the shell.
TopoDS_Shape aModifShape = aContext->Apply(theShape);
TopExp_Explorer anExpSh(aModifShape, TopAbs_SHELL);
for (; anExpSh.More(); anExpSh.Next()) {
TopoDS_Shell aShell = TopoDS::Shell(anExpSh.Current());
Handle(ShapeFix_Shell) aSfsh = new ShapeFix_Shell;
aSfsh->FixFaceOrientation(aShell);
aContext->Replace(aShell, aSfsh->Shell());
}
}
} // end processing each solid
const TopoDS_Shape aResult = aContext->Apply(theShape);
aResult = myContext->Apply(Shape);
return aResult;
}