1 // Created on: 1993-05-07
2 // Created by: Jean Yves LEBEY
3 // Copyright (c) 1993-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
5 //
6 // This file is part of Open CASCADE Technology software library.
7 //
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.
13 //
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
16 
17 #ifndef _TopOpeBRep_ShapeIntersector2d_HeaderFile
18 #define _TopOpeBRep_ShapeIntersector2d_HeaderFile
19 
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
23 
24 #include <TopoDS_Shape.hxx>
25 #include <TopOpeBRepTool_ShapeExplorer.hxx>
26 #include <TopOpeBRep_ShapeScanner.hxx>
27 #include <TopOpeBRep_EdgesIntersector.hxx>
28 #include <Standard_Boolean.hxx>
29 #include <Standard_Integer.hxx>
30 class TopOpeBRepTool_HBoxTool;
31 class TopoDS_Shape;
32 class TopOpeBRep_EdgesIntersector;
33 
34 
35 //! Intersect two shapes.
36 //!
37 //! A GeomShape is a  shape with a geometric domain, i.e.
38 //! a Face or an Edge.
39 //!
40 //! The purpose   of  the  ShapeIntersector2d is   to  find
41 //! couples  of  intersecting   GeomShape  in  two Shapes
42 //! (which can   be  any kind of  topologies  : Compound,
43 //! Solid, Shell, etc... )
44 //!
45 //! It  is in charge  of  exploration  of the shapes  and
46 //! rejection. For this it is provided with two tools :
47 //!
48 //! - ShapeExplorer from TopOpeBRepTool.
49 //! - ShapeScanner from TopOpeBRep which implements bounding boxes.
50 //!
51 //! Let S1,S2 the shapes sent to InitIntersection(S1,S2) method :
52 //! - S1 is always SCANNED by a ShapeScanner from TopOpeBRep.
53 //! - S2 is always EXPLORED by a ShapeExplorer from TopOpeBRepTool.
54 class TopOpeBRep_ShapeIntersector2d
55 {
56 public:
57 
58   DEFINE_STANDARD_ALLOC
59 
60 
61   Standard_EXPORT TopOpeBRep_ShapeIntersector2d();
62 
63   //! Initialize the intersection of shapes S1,S2.
64   Standard_EXPORT void InitIntersection (const TopoDS_Shape& S1, const TopoDS_Shape& S2);
65 
66   //! return  the shape  <Index> ( = 1 or 2) given to
67   //! InitIntersection().
68   //! Index = 1 will return S1, Index = 2 will return S2.
69   Standard_EXPORT const TopoDS_Shape& Shape (const Standard_Integer Index) const;
70 
71   //! returns True if there are more intersection
72   //! between two the shapes.
73   Standard_EXPORT Standard_Boolean MoreIntersection() const;
74 
75   //! search for the next intersection between the two shapes.
76   Standard_EXPORT void NextIntersection();
77 
78   //! return the current intersection of two Edges.
79   Standard_EXPORT TopOpeBRep_EdgesIntersector& ChangeEdgesIntersector();
80 
81   //! return  geometric  shape <Index> ( = 1 or 2 )  of
82   //! current intersection.
83   Standard_EXPORT const TopoDS_Shape& CurrentGeomShape (const Standard_Integer Index) const;
84 
85   Standard_EXPORT void DumpCurrent (const Standard_Integer K) const;
86 
87   Standard_EXPORT Standard_Integer Index (const Standard_Integer K) const;
88 
89 
90 
91 
92 protected:
93 
94 
95 
96 
97 
98 private:
99 
100 
101   Standard_EXPORT void Reset();
102 
103   Standard_EXPORT void Init (const TopoDS_Shape& S1, const TopoDS_Shape& S2);
104 
105   Standard_EXPORT void SetIntersectionDone();
106 
107   Standard_EXPORT void InitFFIntersection();
108 
109   Standard_EXPORT void FindFFIntersection();
110 
111   Standard_EXPORT Standard_Boolean MoreFFCouple() const;
112 
113   Standard_EXPORT void NextFFCouple();
114 
115   Standard_EXPORT void InitEEFFIntersection();
116 
117   Standard_EXPORT void FindEEFFIntersection();
118 
119   Standard_EXPORT Standard_Boolean MoreEEFFCouple() const;
120 
121   Standard_EXPORT void NextEEFFCouple();
122 
123 
124   TopoDS_Shape myShape1;
125   TopoDS_Shape myShape2;
126   Handle(TopOpeBRepTool_HBoxTool) myHBoxTool;
127   TopOpeBRepTool_ShapeExplorer myFaceExplorer;
128   TopOpeBRep_ShapeScanner myFaceScanner;
129   TopOpeBRepTool_ShapeExplorer myEdgeExplorer;
130   TopOpeBRep_ShapeScanner myEdgeScanner;
131   TopOpeBRep_EdgesIntersector myEEIntersector;
132   Standard_Boolean myIntersectionDone;
133   Standard_Boolean myFFDone;
134   Standard_Boolean myEEFFDone;
135   Standard_Boolean myFFInit;
136   Standard_Boolean myEEFFInit;
137 
138 
139 };
140 
141 
142 
143 
144 
145 
146 
147 #endif // _TopOpeBRep_ShapeIntersector2d_HeaderFile
148