Integration of OCCT 6.5.0 from SVN

src/BRepClass3d/BRepClass3d_Intersector3d.cxx

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+// File:	BRepClass_Intersector3d.cdl
+// Created:	Fri Apr  1 09:14:28 1994
+// Author:	Laurent BUCHARD
+//		<lbr@fuegox>
+//-Copyright:	 Matra Datavision 1994
+
+
+//  Modified by skv - Fri Mar  4 12:07:34 2005 OCC7966
+
+#include <BRepClass3d_Intersector3d.ixx>
+
+#include <IntCurveSurface_IntersectionPoint.hxx>
+#include <gp_Lin.hxx>
+#include <TopoDS_Face.hxx>
+#include <TopAbs.hxx>
+
+
+#include <IntCurveSurface_HInter.hxx>
+#include <BRepAdaptor_HSurface.hxx>
+#include <Geom_Line.hxx>
+#include <gp_Pnt2d.hxx>
+#include <BRepClass_FaceClassifier.hxx>
+
+#include <GeomAdaptor_Curve.hxx>
+
+#include <GeomAdaptor_HCurve.hxx>
+#include <BRepAdaptor_HSurface.hxx>
+
+//============================================================================
+BRepClass3d_Intersector3d::BRepClass3d_Intersector3d() 
+     : done(Standard_False),hasapoint(Standard_False)
+{ 
+}
+//============================================================================
+void BRepClass3d_Intersector3d::Perform(const gp_Lin& L,
+					const Standard_Real /*Prm*/,
+					const Standard_Real Tol,
+					const TopoDS_Face& Face) { 
+
+  static IntCurveSurface_HInter            HICS; 
+  static BRepAdaptor_Surface               surface;
+  static BRepClass_FaceClassifier          classifier2d;
+
+  Handle(Geom_Line) geomline = new Geom_Line(L);
+  GeomAdaptor_Curve LL(geomline);
+
+  surface.Initialize(Face,Standard_True);
+
+  Standard_Boolean IsUPer, IsVPer;
+  Standard_Real uperiod=0, vperiod=0;
+  if ((IsUPer = surface.IsUPeriodic()))
+    uperiod = surface.UPeriod();
+  if ((IsVPer = surface.IsVPeriodic()))
+    vperiod = surface.VPeriod();
+
+  Standard_Real U1, U2, V1, V2;
+  U1 = surface.FirstUParameter();
+  U2 = surface.LastUParameter();
+  V1 = surface.FirstVParameter();
+  V2 = surface.LastVParameter();
+  
+  //--
+  Handle(GeomAdaptor_HCurve) HLL  = new GeomAdaptor_HCurve(LL);
+  Handle(BRepAdaptor_HSurface) Hsurface = new BRepAdaptor_HSurface(surface);
+  //-- 
+  HICS.Perform(HLL,Hsurface);
+  
+  W=RealLast();
+  if(HICS.IsDone()) {
+    for(Standard_Integer index=HICS.NbPoints(); index>=1; index--) {  
+      gp_Pnt2d Puv(HICS.Point(index).U(),HICS.Point(index).V());
+
+      Standard_Integer N1 = 0;
+      Standard_Integer N2 = 0;
+
+      Standard_Real X = Puv.X();
+      Standard_Real Y = Puv.Y();
+
+      if(IsUPer) {
+        if(X > U2) {
+          N1 = RealToInt( (X - U1) / uperiod );
+        }
+        if(X < U1) {
+          N1 = RealToInt( (X - U2) / uperiod );
+        }
+        Puv.SetX(X - uperiod * N1);
+      }
+
+      if(IsVPer) {
+        if(Y > V2) {
+          N2 = RealToInt ( (Y - V1) / vperiod );
+        }
+        if(Y < V1) {
+          N2 = RealToInt ( (Y - V2) / vperiod );
+        }
+        Puv.SetY(Y - vperiod * N2);
+      }
+
+      classifier2d.Perform(Face,Puv,Tol);
+      TopAbs_State currentstate = classifier2d.State();
+      if(currentstate==TopAbs_IN || currentstate==TopAbs_ON) { 
+	const IntCurveSurface_IntersectionPoint& HICSPoint = HICS.Point(index);
+	Standard_Real HICSW = HICSPoint.W();
+//  Modified by skv - Fri Mar  4 12:07:34 2005 OCC7966 Begin
+	if((W > HICSW) && (HICSW>-Tol)) { 
+// 	if(W > HICSW) { 
+//  Modified by skv - Fri Mar  4 12:07:34 2005 OCC7966 End
+	  hasapoint  = Standard_True;
+	  U          = HICSPoint.U();
+	  V          = HICSPoint.V();
+	  W          = HICSW; 
+	  transition = HICSPoint.Transition();
+	  pnt        = HICSPoint.Pnt();
+	  state      = currentstate;
+	  face       = Face;
+	  if(Face.Orientation()==TopAbs_REVERSED) { 
+	    if(transition == IntCurveSurface_In) 
+	      transition = IntCurveSurface_Out;
+	    else 
+	      transition = IntCurveSurface_In;
+	  }
+	} 
+      } //-- classifier state is IN or ON
+      done = Standard_True;
+    } //-- Loop on Intersection points.
+  } //-- HICS.IsDone()
+}
+
+
+