1 // Created on: 1994-04-01
2 // Created by: Laurent BUCHARD
3 // Copyright (c) 1994-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
18 #include <BRepAdaptor_Surface.hxx>
19 #include <BRepClass3d_Intersector3d.hxx>
20 #include <BRepClass_FaceClassifier.hxx>
21 #include <Geom_Line.hxx>
22 #include <GeomAdaptor_Curve.hxx>
23 #include <GeomAdaptor_Curve.hxx>
26 #include <gp_Pnt2d.hxx>
27 #include <IntCurveSurface_HInter.hxx>
28 #include <IntCurveSurface_IntersectionPoint.hxx>
30 #include <TopoDS_Face.hxx>
32 //============================================================================
33 BRepClass3d_Intersector3d::BRepClass3d_Intersector3d()
38 hasapoint(Standard_False),
42 //============================================================================
43 void BRepClass3d_Intersector3d::Perform(const gp_Lin& L,
44 const Standard_Real /*Prm*/,
45 const Standard_Real Tol,
46 const TopoDS_Face& Face) {
48 IntCurveSurface_HInter HICS;
49 BRepAdaptor_Surface surface;
50 BRepClass_FaceClassifier classifier2d;
52 Handle(Geom_Line) geomline = new Geom_Line(L);
53 GeomAdaptor_Curve LL(geomline);
55 surface.Initialize(Face,Standard_True);
57 const Standard_Boolean IsUPer = surface.IsUPeriodic();
58 const Standard_Boolean IsVPer = surface.IsVPeriodic();
59 const Standard_Real uperiod = IsUPer ? surface.UPeriod() : 0.0;
60 const Standard_Real vperiod = IsVPer ? surface.VPeriod() : 0.0;
62 Standard_Real U1 = surface.FirstUParameter();
63 Standard_Real U2 = surface.LastUParameter();
64 Standard_Real V1 = surface.FirstVParameter();
65 Standard_Real V2 = surface.LastVParameter();
68 Handle(GeomAdaptor_Curve) HLL = new GeomAdaptor_Curve(LL);
69 Handle(BRepAdaptor_Surface) Hsurface = new BRepAdaptor_Surface(surface);
71 HICS.Perform(HLL,Hsurface);
75 for(Standard_Integer index=HICS.NbPoints(); index>=1; index--) {
76 gp_Pnt2d Puv(HICS.Point(index).U(),HICS.Point(index).V());
78 Standard_Integer N1 = 0;
79 Standard_Integer N2 = 0;
81 Standard_Real X = Puv.X();
82 Standard_Real Y = Puv.Y();
86 N1 = RealToInt( (X - U1) / uperiod );
89 N1 = RealToInt( (X - U2) / uperiod );
91 Puv.SetX(X - uperiod * N1);
96 N2 = RealToInt ( (Y - V1) / vperiod );
99 N2 = RealToInt ( (Y - V2) / vperiod );
101 Puv.SetY(Y - vperiod * N2);
104 classifier2d.Perform(Face,Puv,Tol);
105 TopAbs_State currentstate = classifier2d.State();
106 if(currentstate==TopAbs_IN || currentstate==TopAbs_ON) {
107 const IntCurveSurface_IntersectionPoint& HICSPoint = HICS.Point(index);
108 Standard_Real HICSW = HICSPoint.W();
109 // Modified by skv - Fri Mar 4 12:07:34 2005 OCC7966 Begin
110 if((W > HICSW) && (HICSW>-Tol)) {
112 // Modified by skv - Fri Mar 4 12:07:34 2005 OCC7966 End
113 hasapoint = Standard_True;
117 transition = HICSPoint.Transition();
118 pnt = HICSPoint.Pnt();
119 state = currentstate;
121 if(Face.Orientation()==TopAbs_REVERSED) {
122 if(transition == IntCurveSurface_In)
123 transition = IntCurveSurface_Out;
125 transition = IntCurveSurface_In;
128 } //-- classifier state is IN or ON
129 done = Standard_True;
130 } //-- Loop on Intersection points.