#include <BOPTools.hxx>
#include <BRep_Builder.hxx>
#include <BRep_Curve3D.hxx>
-#include <BRep_TEdge.hxx>
-#include <BRep_TVertex.hxx>
+#include <BRep_Tool.hxx>
#include <BRepAlgoAPI_Cut.hxx>
#include <BRepBuilderAPI_MakeFace.hxx>
#include <BRepClass_FaceClassifier.hxx>
const double shift = acos(1.0 - 3.0 * tolerance);
/// \brief Search first vertex - the vertex with lowest x coordinate, which is used in 2 edges at least
-static const TopoDS_Shape& findStartVertex(const BOPCol_IndexedDataMapOfShapeListOfShape& theMapVE,
+static const TopoDS_Vertex& findStartVertex(const BOPCol_IndexedDataMapOfShapeListOfShape& theMapVE,
const gp_Dir& theDirX, const gp_Dir& theDirY);
/// \brief Search the vertex on the sketch candidate to be the next one in the loop
-static void findNextVertex(const TopoDS_Shape& theStartVertex,
+static void findNextVertex(const TopoDS_Vertex& theStartVertex,
const BOPCol_IndexedDataMapOfShapeListOfShape& theVertexEdgeMap,
const gp_Dir& theStartDir, const gp_Dir& theNormal,
- TopoDS_Shape& theNextVertex, TopoDS_Shape& theNextEdge,
+ TopoDS_Vertex& theNextVertex, TopoDS_Edge& theNextEdge,
gp_Dir& theNextDir);
/// \brief Create planar face using the edges surrounding it
-static void createFace(const TopoDS_Shape& theStartVertex,
- const std::list<TopoDS_Shape>::iterator& theStartEdge,
- const std::list<TopoDS_Shape>::iterator& theEndOfEdges,
+static void createFace(const TopoDS_Vertex& theStartVertex,
+ const std::list<TopoDS_Edge>::iterator& theStartEdge,
+ const std::list<TopoDS_Edge>::iterator& theEndOfEdges,
const gp_Pln& thePlane, TopoDS_Face& theResFace);
/// \bief Create planar wire
-static void createWireList(const TopoDS_Shape& theStartVertex,
- const std::list<TopoDS_Shape>::iterator& theStartEdge,
- const std::list<TopoDS_Shape>::iterator& theEndOfEdges,
- const std::set<Handle(TopoDS_TShape)>& theEdgesInLoops,
+static void createWireList(const TopoDS_Vertex& theStartVertex,
+ const std::list<TopoDS_Edge>::iterator& theStartEdge,
+ const std::list<TopoDS_Edge>::iterator& theEndOfEdges,
+ const std::set<TopoDS_Edge*>& theEdgesInLoops,
std::list<TopoDS_Wire>& theResWires);
/// \brief Calculate outer tengency on the edge in specified vertex
-static gp_Dir getOuterEdgeDirection(const TopoDS_Shape& theEdge, const TopoDS_Shape& theVertex);
+static gp_Dir getOuterEdgeDirection(const TopoDS_Edge& theEdge, const TopoDS_Vertex& theVertex);
/// \brief Unnecessary edges will be removed from the map.
/// Positions of iterator will be updated
-static void removeWasteEdges(std::list<TopoDS_Shape>::iterator& theStartVertex,
- std::list<TopoDS_Shape>::iterator& theStartEdge,
- const std::list<TopoDS_Shape>::iterator& theEndOfVertexes,
- const std::list<TopoDS_Shape>::iterator& theEndOfEdges,
+static void removeWasteEdges(std::list<TopoDS_Vertex>::iterator& theStartVertex,
+ std::list<TopoDS_Edge>::iterator& theStartEdge,
+ const std::list<TopoDS_Vertex>::iterator& theEndOfVertexes,
+ const std::list<TopoDS_Edge>::iterator& theEndOfEdges,
BOPCol_IndexedDataMapOfShapeListOfShape& theMapVE);
+
void GeomAlgoAPI_SketchBuilder::createFaces(
const boost::shared_ptr<GeomAPI_Pnt>& theOrigin, const boost::shared_ptr<GeomAPI_Dir>& theDirX,
const boost::shared_ptr<GeomAPI_Dir>& theDirY, const boost::shared_ptr<GeomAPI_Dir>& theNorm,
gp_Pln aPlane(theOrigin->impl<gp_Pnt>(), aNorm);
// Set of edges used in loops
- std::set<Handle(TopoDS_TShape)> anEdgesInLoops;
+ std::set<TopoDS_Edge*> anEdgesInLoops;
// Lists for processed vertexes and edges
- std::list<TopoDS_Shape> aProcVertexes;
- std::list<TopoDS_Shape> aProcEdges;
+ std::list<TopoDS_Vertex> aProcVertexes;
+ std::list<TopoDS_Edge> aProcEdges;
// Search the start vertex
- TopoDS_Shape aStartVertex = findStartVertex(aMapVE, aDirX, aDirY);
+ TopoDS_Vertex aStartVertex = findStartVertex(aMapVE, aDirX, aDirY);
aProcVertexes.push_back(aStartVertex);
- TopoDS_Shape aCurVertex = aStartVertex;
+ TopoDS_Vertex aCurVertex = aStartVertex;
gp_Dir aCurDir = aDirY.Reversed();
gp_Dir aCurNorm = aNorm.Reversed();
// Go through the edges and find loops
- TopoDS_Shape aNextVertex;
- TopoDS_Shape aBindingEdge;
+ TopoDS_Vertex aNextVertex;
+ TopoDS_Edge aBindingEdge;
gp_Dir aNextDir;
while (aMapVE.Extent() > 0) {
if (aCurVertex.IsNull())
aCurNorm = aNorm;
// Try to find next vertex in the list of already processed
- std::list<TopoDS_Shape>::iterator aVertIter = aProcVertexes.begin();
- std::list<TopoDS_Shape>::iterator anEdgeIter = aProcEdges.begin();
+ bool isLoopFound = false;
+ std::list<TopoDS_Vertex>::iterator aVertIter = aProcVertexes.begin();
+ std::list<TopoDS_Edge>::iterator anEdgeIter = aProcEdges.begin();
for (; aVertIter != aProcVertexes.end(); aVertIter++) {
- if (aVertIter->TShape() == aNextVertex.TShape())
+ if (aVertIter->IsSame(aNextVertex)) {
+ isLoopFound = true;
break;
+ }
if (anEdgeIter != aProcEdges.end())
anEdgeIter++;
}
+ bool isCircleFound = (isLoopFound && anEdgeIter == aProcEdges.end());
aProcVertexes.push_back(aNextVertex);
aProcEdges.push_back(aBindingEdge);
- // The loop was found
- if (aVertIter != aProcVertexes.end()) {
- // If the binding edge is a full circle, then the list may be empty before addition. Need to update edge iterator
- if (aProcEdges.size() == 1)
- anEdgeIter = aProcEdges.begin();
-
- if (aVertIter != aProcVertexes.begin()) {
+ if (isLoopFound) {
+ // If the binding edge is a full circle, then it may be added recently. Need to update edge iterator
+ if (isCircleFound) {
+ anEdgeIter = aProcEdges.end();
+ anEdgeIter--;
+ }
+ else if (aVertIter != aProcVertexes.begin()) {
// Check the orientation of the loop
gp_Dir aCN = getOuterEdgeDirection(*anEdgeIter, *aVertIter);
gp_Dir aCP = getOuterEdgeDirection(aProcEdges.back(), *aVertIter);
aCP.Reverse();
if (aCN.DotCross(aCP, aNorm) < -tolerance) {
// The found loop has wrong orientation and may contain sub-loops.
- // Need to check it onle again with another initial direction.
+ // Need to check it once again with another initial direction.
aCurVertex = *aVertIter;
do {
aProcVertexes.pop_back();
aProcEdges.pop_back();
} while (aCurVertex != aProcVertexes.back());
- aCurDir = getOuterEdgeDirection(aProcEdges.back(), aCurVertex);
+ aCurDir = aCN.Reversed();
aCurNorm = aNorm.Reversed();
continue;
}
}
+ if (!isCircleFound && anEdgeIter != aProcEdges.end() &&
+ anEdgeIter->IsSame(aProcEdges.back())) { // The loop on the same edge taken twice
+ aProcVertexes.pop_back();
+ aProcEdges.pop_back();
+ aCurVertex = aProcVertexes.back();
+ aCurDir = getOuterEdgeDirection(aProcEdges.back(), aCurVertex);
+ aCurNorm = aNorm.Reversed();
+ continue;
+ }
+
// When the orientation is correct or the edges looped through
// the first element, create new face and remove unnecessary edges.
TopoDS_Face aPatch;
theResultFaces.push_back(aFace);
}
// push the edges used in the loop to the map
- std::list<TopoDS_Shape>::iterator anIter;
+ std::list<TopoDS_Edge>::iterator anIter;
for (anIter = anEdgeIter; anIter != aProcEdges.end(); anIter++)
- anEdgesInLoops.insert(anIter->TShape());
+ anEdgesInLoops.insert(&(*anIter));
// remove unnecessary edges
- std::list<TopoDS_Shape>::iterator aCopyVLoop = aVertIter;
- std::list<TopoDS_Shape>::iterator aCopyELoop = anEdgeIter;
+ std::list<TopoDS_Vertex>::iterator aCopyVLoop = aVertIter;
+ std::list<TopoDS_Edge>::iterator aCopyELoop = anEdgeIter;
removeWasteEdges(aVertIter, anEdgeIter, aProcVertexes.end(), aProcEdges.end(), aMapVE);
// revert the list of remaining edges
- std::list<TopoDS_Shape> aRemainVertexes;
+ std::list<TopoDS_Vertex> aRemainVertexes;
for (; aVertIter != aProcVertexes.end(); aVertIter++)
aRemainVertexes.push_front(*aVertIter);
- std::list<TopoDS_Shape> aRemainEdges;
+ std::list<TopoDS_Edge> aRemainEdges;
for (; anEdgeIter != aProcEdges.end(); anEdgeIter++)
aRemainEdges.push_front(*anEdgeIter);
// remove edges and vertexes used in the loop and add remaining ones
// we need to go back through the list of already checked edges to find a branching vertex
if (!aMapVE.IsEmpty() && aMapVE.Contains(aNextVertex)
&& aMapVE.FindFromKey(aNextVertex).Size() == 1) {
- std::list<TopoDS_Shape>::reverse_iterator aVRIter = aProcVertexes.rbegin();
- std::list<TopoDS_Shape>::reverse_iterator aERIter = aProcEdges.rbegin();
+ std::list<TopoDS_Vertex>::reverse_iterator aVRIter = aProcVertexes.rbegin();
+ std::list<TopoDS_Edge>::reverse_iterator aERIter = aProcEdges.rbegin();
if (aVRIter != aProcVertexes.rend())
aVRIter++;
if (aERIter != aProcEdges.rend())
break;
if (aERIter != aProcEdges.rend()
|| (aVRIter != aProcVertexes.rend() && aMapVE.FindFromKey(*aVRIter).Size() == 1)) { // the branching vertex was found or current list of edges is a wire without branches
- std::list<TopoDS_Shape>::iterator aEIter;
- TopoDS_Shape aCurEdge;
+ std::list<TopoDS_Edge>::iterator aEIter;
+ TopoDS_Edge aCurEdge;
if (aERIter != aProcEdges.rend()) {
aEIter = aERIter.base();
aCurEdge = *aERIter;
aWire->setImpl(new TopoDS_Shape(*aTailIter));
theResultWires.push_back(aWire);
}
- std::list<TopoDS_Shape>::iterator aVIter = aVRIter.base();
- std::list<TopoDS_Shape>::iterator aEItCopy = aEIter;
+ std::list<TopoDS_Vertex>::iterator aVIter = aVRIter.base();
+ std::list<TopoDS_Edge>::iterator aEItCopy = aEIter;
removeWasteEdges(--aVIter, aEItCopy, aProcVertexes.end(), aProcEdges.end(), aMapVE);
aProcEdges.erase(aEIter, aProcEdges.end());
aProcVertexes.clear();
aProcEdges.clear();
- TopoDS_Shape aStartEdge;
aStartVertex = findStartVertex(aMapVE, aDirX, aDirY);
aProcVertexes.push_back(aStartVertex);
aNextVertex = aStartVertex;
assert(aF1.ShapeType() == TopAbs_FACE); // all items in result list should be faces
TopExp_Explorer aVert2((*anIter2)->impl<TopoDS_Shape>(), TopAbs_VERTEX);
for (; aVert2.More(); aVert2.Next()) {
- Handle(BRep_TVertex) aV = Handle(BRep_TVertex)::DownCast(aVert2.Current().TShape());
- aClassifier.Perform(aF1, aV->Pnt(), tolerance);
- if (aClassifier.State() != TopAbs_IN)
+ const TopoDS_Vertex& aV = (const TopoDS_Vertex&)aVert2.Current();
+ aClassifier.Perform(aF1, BRep_Tool::Pnt(aV), tolerance);
+ if (aClassifier.State() != TopAbs_IN && aClassifier.State() != TopAbs_ON)
break;
}
if (aVert2.More()) { // second shape is not inside first, change the shapes order and repeat comparision
assert(aF2.ShapeType() == TopAbs_FACE); // all items in result list should be faces
TopExp_Explorer aVert1((*anIter1)->impl<TopoDS_Shape>(), TopAbs_VERTEX);
for (; aVert1.More(); aVert1.Next()) {
- Handle(BRep_TVertex) aV = Handle(BRep_TVertex)::DownCast(aVert1.Current().TShape());
- aClassifier.Perform(aF2, aV->Pnt(), tolerance);
- if (aClassifier.State() != TopAbs_IN)
+ const TopoDS_Vertex& aV = (const TopoDS_Vertex&)aVert2.Current();
+ aClassifier.Perform(aF2, BRep_Tool::Pnt(aV), tolerance);
+ if (aClassifier.State() != TopAbs_IN && aClassifier.State() != TopAbs_ON)
break;
}
if (!aVert1.More()) { // first shape should be cut from the second
}
// =================== Auxiliary functions ====================================
-const TopoDS_Shape& findStartVertex(const BOPCol_IndexedDataMapOfShapeListOfShape& theMapVE,
+const TopoDS_Vertex& findStartVertex(const BOPCol_IndexedDataMapOfShapeListOfShape& theMapVE,
const gp_Dir& theDirX, const gp_Dir& theDirY)
{
int aStartVertexInd = 1;
int aNbVert = theMapVE.Extent();
for (int i = 1; i <= aNbVert; i++) {
const TopoDS_Vertex& aV = (const TopoDS_Vertex&) theMapVE.FindKey(i);
- const Handle(BRep_TVertex)& aVert = (const Handle(BRep_TVertex)&) aV.TShape();
- const gp_Pnt& aVertPnt = aVert->Pnt();
+ const gp_Pnt& aVertPnt = BRep_Tool::Pnt(aV);
double aX = aVertPnt.XYZ().Dot(theDirX.XYZ());
double aY = aVertPnt.XYZ().Dot(theDirY.XYZ());
aStartVertexInd = i;
}
}
- return theMapVE.FindKey(aStartVertexInd);
+ return static_cast<const TopoDS_Vertex&>(theMapVE.FindKey(aStartVertexInd));
}
-void findNextVertex(const TopoDS_Shape& theStartVertex,
+void findNextVertex(const TopoDS_Vertex& theStartVertex,
const BOPCol_IndexedDataMapOfShapeListOfShape& theVertexEdgeMap,
- const gp_Dir& theStartDir, const gp_Dir& theNormal, TopoDS_Shape& theNextVertex,
- TopoDS_Shape& theNextEdge, gp_Dir& theNextDir)
+ const gp_Dir& theStartDir, const gp_Dir& theNormal, TopoDS_Vertex& theNextVertex,
+ TopoDS_Edge& theNextEdge, gp_Dir& theNextDir)
{
const BOPCol_ListOfShape& anEdgesList = theVertexEdgeMap.FindFromKey(theStartVertex);
BOPCol_ListOfShape::Iterator aEdIter(anEdgesList);
double aBestEdgeProj = DBL_MAX;
for (; aEdIter.More(); aEdIter.Next()) {
- gp_Dir aTang = getOuterEdgeDirection(aEdIter.Value(), theStartVertex);
+ const TopoDS_Edge& anEdge = static_cast<const TopoDS_Edge&>(aEdIter.Value());
+ gp_Dir aTang = getOuterEdgeDirection(anEdge, theStartVertex);
aTang.Reverse();
// The projection is normalized in segment (-1, 1),
if (aProj < aBestEdgeProj) {
aBestEdgeProj = aProj;
- theNextEdge = aEdIter.Value();
+ theNextEdge = anEdge;
TopExp_Explorer aVertExp(theNextEdge, TopAbs_VERTEX);
for (; aVertExp.More(); aVertExp.Next())
- if (aVertExp.Current().TShape() != theStartVertex.TShape()) {
- theNextVertex = aVertExp.Current();
- theNextDir = getOuterEdgeDirection(aEdIter.Value(), theNextVertex);
+ if (!aVertExp.Current().IsSame(theStartVertex)) {
+ theNextVertex = static_cast<const TopoDS_Vertex&>(aVertExp.Current());
+ theNextDir = getOuterEdgeDirection(anEdge, theNextVertex);
break;
}
if (!aVertExp.More()) { // This edge is a full circle
TopoDS_Vertex aV1, aV2;
- TopExp::Vertices(*(const TopoDS_Edge*) (&theNextEdge), aV1, aV2);
+ TopExp::Vertices(theNextEdge, aV1, aV2);
if (aV1.Orientation() == theStartVertex.Orientation())
theNextVertex = aV2;
else
theNextVertex = aV1;
- theNextDir = getOuterEdgeDirection(aEdIter.Value(), theNextVertex);
+ theNextDir = getOuterEdgeDirection(anEdge, theNextVertex);
}
}
}
TopExp_Explorer aVertExp(theEdge, TopAbs_VERTEX);
for (; aVertExp.More(); aVertExp.Next()) {
const TopoDS_Shape& aVertex = aVertExp.Current();
- if (aVertex.TShape() == theSpliceVertex.TShape()
+ if (aVertex.IsSame(theSpliceVertex)
&& aVertex.Orientation() != theEdge.Orientation()) { // Current vertex is the last for the edge, so its orientation is wrong, need to revert the edge
anEdge.Reverse();
break;
}
- if (aVertex.TShape() != theSpliceVertex.TShape()) {
+ if (!aVertex.IsSame(theSpliceVertex)) {
aCurVertChanged = aVertex;
isCurVertChanged = true;
}
theBuilder.Add(theWire, anEdge);
}
-void createFace(const TopoDS_Shape& theStartVertex,
- const std::list<TopoDS_Shape>::iterator& theStartEdge,
- const std::list<TopoDS_Shape>::iterator& theEndOfEdges, const gp_Pln& thePlane,
+void createFace(const TopoDS_Vertex& theStartVertex,
+ const std::list<TopoDS_Edge>::iterator& theStartEdge,
+ const std::list<TopoDS_Edge>::iterator& theEndOfEdges,
+ const gp_Pln& thePlane,
TopoDS_Face& theResFace)
{
TopoDS_Wire aResWire;
BRep_Builder aBuilder;
aBuilder.MakeWire(aResWire);
- TopoDS_Shape aCurVertex = theStartVertex;
- std::list<TopoDS_Shape>::const_iterator anEdgeIter = theStartEdge;
+ TopoDS_Vertex aCurVertex = theStartVertex;
+ std::list<TopoDS_Edge>::const_iterator anEdgeIter = theStartEdge;
for (; anEdgeIter != theEndOfEdges; anEdgeIter++) {
- TopoDS_Edge anEdge = *((TopoDS_Edge*) (&(*anEdgeIter)));
- if (!anEdge.IsNull())
- addEdgeToWire(anEdge, aBuilder, aCurVertex, aResWire);
+ if (!anEdgeIter->IsNull())
+ addEdgeToWire(*anEdgeIter, aBuilder, aCurVertex, aResWire);
}
BRepBuilderAPI_MakeFace aFaceBuilder(thePlane, aResWire);
theResFace = aFaceBuilder.Face();
}
-void createWireList(const TopoDS_Shape& theStartVertex,
- const std::list<TopoDS_Shape>::iterator& theStartEdge,
- const std::list<TopoDS_Shape>::iterator& theEndOfEdges,
- const std::set<Handle(TopoDS_TShape)>& theEdgesInLoops,
+void createWireList(const TopoDS_Vertex& theStartVertex,
+ const std::list<TopoDS_Edge>::iterator& theStartEdge,
+ const std::list<TopoDS_Edge>::iterator& theEndOfEdges,
+ const std::set<TopoDS_Edge*>& theEdgesInLoops,
std::list<TopoDS_Wire>& theResWires)
{
BRep_Builder aBuilder;
bool needNewWire = true;
- TopoDS_Shape aCurVertex = theStartVertex;
+ TopoDS_Vertex aCurVertex = theStartVertex;
- std::list<TopoDS_Shape>::iterator anIter = theStartEdge;
+ std::list<TopoDS_Edge>::iterator anIter = theStartEdge;
while (anIter != theEndOfEdges) {
- while (anIter != theEndOfEdges && needNewWire && theEdgesInLoops.count(anIter->TShape()) != 0) {
+ while (anIter != theEndOfEdges && needNewWire && theEdgesInLoops.count(&(*anIter)) != 0) {
TopExp_Explorer aVertExp(*anIter, TopAbs_VERTEX);
for (; aVertExp.More(); aVertExp.Next())
- if (aVertExp.Current().TShape() != aCurVertex.TShape()) {
- aCurVertex = aVertExp.Current();
+ if (!aVertExp.Current().IsSame(aCurVertex)) {
+ aCurVertex = static_cast<const TopoDS_Vertex&>(aVertExp.Current());
break;
}
anIter++;
aBuilder.MakeWire(aWire);
theResWires.push_back(aWire);
needNewWire = false;
- } else if (theEdgesInLoops.count(anIter->TShape()) != 0) { // There was found the edge already used in loop.
- // Current wire should be released and new one should started
+ } else if (theEdgesInLoops.count(&(*anIter)) != 0) { // There was found the edge already used in loop.
+ // Current wire should be released and new one should started
needNewWire = true;
continue;
}
- TopoDS_Edge anEdge = *((TopoDS_Edge*) (&(*anIter)));
- addEdgeToWire(anEdge, aBuilder, aCurVertex, theResWires.back());
+ addEdgeToWire(*anIter, aBuilder, aCurVertex, theResWires.back());
anIter++;
}
}
-gp_Dir getOuterEdgeDirection(const TopoDS_Shape& theEdge, const TopoDS_Shape& theVertex)
+gp_Dir getOuterEdgeDirection(const TopoDS_Edge& theEdge, const TopoDS_Vertex& theVertex)
{
- const Handle(BRep_TVertex)& aVertex = (const Handle(BRep_TVertex)&) theVertex.TShape();
- gp_Pnt aVertexPnt = aVertex->Pnt();
-
- const Handle(BRep_TEdge)& anEdge = (const Handle(BRep_TEdge)&) theEdge.TShape();
+ gp_Pnt aVertexPnt = BRep_Tool::Pnt(theVertex);
// Convert the edge to the curve to calculate the tangency.
// There should be only one curve in the edge.
- Handle(BRep_Curve3D) aEdCurve =
- Handle(BRep_Curve3D)::DownCast(anEdge->Curves().First());
double aFirst, aLast;
- aEdCurve->Range(aFirst, aLast);
- Handle(Geom_Curve) aCurve = aEdCurve->Curve3D();
+ Handle(Geom_Curve) aCurve = BRep_Tool::Curve(theEdge, aFirst, aLast);
gp_Pnt aPnt;
gp_Vec aTang;
return gp_Dir(aTang);
}
-void removeWasteEdges(std::list<TopoDS_Shape>::iterator& theStartVertex,
- std::list<TopoDS_Shape>::iterator& theStartEdge,
- const std::list<TopoDS_Shape>::iterator& theEndOfVertexes,
- const std::list<TopoDS_Shape>::iterator& theEndOfEdges,
+void removeWasteEdges(std::list<TopoDS_Vertex>::iterator& theStartVertex,
+ std::list<TopoDS_Edge>::iterator& theStartEdge,
+ const std::list<TopoDS_Vertex>::iterator& theEndOfVertexes,
+ const std::list<TopoDS_Edge>::iterator& theEndOfEdges,
BOPCol_IndexedDataMapOfShapeListOfShape& theMapVE)
{
bool isVertStep = true;
BOPCol_ListOfShape& aBunch = theMapVE.ChangeFromKey(*theStartVertex);
BOPCol_ListOfShape::Iterator anApprEdge(aBunch);
for (; anApprEdge.More(); anApprEdge.Next())
- if (anApprEdge.Value() == *theStartEdge)
+ if (anApprEdge.Value().IsSame(*theStartEdge))
break;
if (anApprEdge.More())
aBunch.Remove(anApprEdge);
