Integration of OCCT 6.5.0 from SVN

src/BRepClass/BRepClass_FaceExplorer.cxx

@@ -0,0 +1,199 @@
+// File:	BRepClass_FaceExplorer.cxx
+// Created:	Thu Nov 19 15:54:56 1992
+// Author:	Remi LEQUETTE
+//		<rle@phylox>
+
+
+//  Modified by skv - Thu Jul 13 17:42:58 2006 OCC12627
+//  Total rewriting of the method Segment; add the method OtherSegment.
+
+#include <BRepClass_FaceExplorer.ixx>
+#include <Precision.hxx>
+#include <Geom2d_Curve.hxx>
+#include <TopoDS.hxx>
+#include <BRep_Tool.hxx>
+
+//=======================================================================
+//function : BRepClass_FaceExplorer
+//purpose  : 
+//=======================================================================
+
+BRepClass_FaceExplorer::BRepClass_FaceExplorer(const TopoDS_Face& F) :
+       myFace(F),
+       myCurEdgeInd(1),
+       myCurEdgePar(0.123)
+{
+  myFace.Orientation(TopAbs_FORWARD);
+}
+
+//=======================================================================
+//function : Reject
+//purpose  : 
+//=======================================================================
+
+Standard_Boolean  BRepClass_FaceExplorer::Reject(const gp_Pnt2d&)const 
+{
+  return Standard_False;
+}
+
+//=======================================================================
+//function : Segment
+//purpose  : 
+//=======================================================================
+
+Standard_Boolean BRepClass_FaceExplorer::Segment(const gp_Pnt2d& P, 
+						 gp_Lin2d& L,
+						 Standard_Real& Par)
+{
+  myCurEdgeInd = 1;
+  myCurEdgePar = 0.123;
+
+  return OtherSegment(P, L, Par);
+}
+
+//=======================================================================
+//function : OtherSegment
+//purpose  : 
+//=======================================================================
+
+Standard_Boolean BRepClass_FaceExplorer::OtherSegment(const gp_Pnt2d& P, 
+						      gp_Lin2d& L,
+						      Standard_Real& Par)
+{
+  TopExp_Explorer      anExpF(myFace,TopAbs_EDGE);
+  Standard_Integer     i;
+  Standard_Real        aFPar;
+  Standard_Real        aLPar;
+  Handle(Geom2d_Curve) aC2d;
+  Standard_Real        aTolParConf = Precision::PConfusion();
+  gp_Pnt2d             aPOnC;
+  Standard_Real        aParamIn;
+
+  for (i = 1; anExpF.More(); anExpF.Next(), i++) {
+    if (i != myCurEdgeInd)
+      continue;
+
+    const TopoDS_Shape       &aLocalShape   = anExpF.Current();
+    const TopAbs_Orientation  anOrientation = aLocalShape.Orientation();
+
+    if (anOrientation == TopAbs_FORWARD || anOrientation == TopAbs_REVERSED) {
+      const TopoDS_Edge &anEdge = TopoDS::Edge(aLocalShape);
+
+      aC2d = BRep_Tool::CurveOnSurface(anEdge, myFace, aFPar, aLPar);
+
+      if (!aC2d.IsNull()) {
+	// Treatment of infinite cases.
+	if (Precision::IsNegativeInfinite(aFPar)) {
+	  if (Precision::IsPositiveInfinite(aLPar)) {
+	    aFPar = -1.;
+	    aLPar =  1.;
+	  } else {
+	    aFPar = aLPar - 1.;
+	  }
+	} else if (Precision::IsPositiveInfinite(aLPar))
+	  aLPar = aFPar + 1.;
+
+	for (; myCurEdgePar < 0.7 ;myCurEdgePar += 0.2111) {
+	  aParamIn = myCurEdgePar*aFPar + (1. - myCurEdgePar)*aLPar;
+
+	  aC2d->D0(aParamIn, aPOnC);
+	  Par = aPOnC.Distance(P);
+
+	  if (Par > aTolParConf) {
+	    gp_Vec2d aLinVec(P, aPOnC);
+	    gp_Dir2d aLinDir(aLinVec);
+
+	    L = gp_Lin2d(P, aLinDir);
+
+	    // Check if ends of a curve lie on a line.
+	    aC2d->D0(aFPar, aPOnC);
+
+	    if (L.Distance(aPOnC) > aTolParConf) {
+	      aC2d->D0(aLPar, aPOnC);
+
+	      if (L.Distance(aPOnC) > aTolParConf) {
+		myCurEdgePar += 0.2111;
+
+		if (myCurEdgePar >= 0.7) {
+		  myCurEdgeInd++;
+		  myCurEdgePar = 0.123;
+		}
+
+		return Standard_True;
+	      }
+	    }
+	  }
+	}
+      } // if (!aC2d.IsNull()) {
+    } // if (anOrientation == TopAbs_FORWARD ...
+
+    // This curve is not valid for line construction. Go to another edge.
+    myCurEdgeInd++;
+    myCurEdgePar = 0.123;
+  }
+
+  // nothing found, return an horizontal line
+  Par = RealLast();
+  L   = gp_Lin2d(P,gp_Dir2d(1,0));
+
+  return Standard_False;
+}
+
+//=======================================================================
+//function : InitWires
+//purpose  : 
+//=======================================================================
+
+void  BRepClass_FaceExplorer::InitWires()
+{
+  myWExplorer.Init(myFace,TopAbs_WIRE);
+}
+
+//=======================================================================
+//function : RejectWire NYI
+//purpose  : 
+//=======================================================================
+
+Standard_Boolean  BRepClass_FaceExplorer::RejectWire
+  (const gp_Lin2d& , 
+   const Standard_Real)const 
+{
+  return Standard_False;
+}
+
+//=======================================================================
+//function : InitEdges
+//purpose  : 
+//=======================================================================
+
+void  BRepClass_FaceExplorer::InitEdges()
+{
+  myEExplorer.Init(myWExplorer.Current(),TopAbs_EDGE);
+}
+
+//=======================================================================
+//function : RejectEdge NYI
+//purpose  : 
+//=======================================================================
+
+Standard_Boolean  BRepClass_FaceExplorer::RejectEdge
+  (const gp_Lin2d& , 
+   const Standard_Real )const 
+{
+  return Standard_False;
+}
+
+
+//=======================================================================
+//function : CurrentEdge
+//purpose  : 
+//=======================================================================
+
+void  BRepClass_FaceExplorer::CurrentEdge(BRepClass_Edge& E, 
+					  TopAbs_Orientation& Or) const 
+{
+  E.Edge() = TopoDS::Edge(myEExplorer.Current());
+  E.Face() = myFace;
+  Or = E.Edge().Orientation();
+}
+