1 // Created on: 1991-02-21
2 // Created by: Isabelle GRIGNON
3 // Copyright (c) 1991-1999 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.
17 #ifndef _Extrema_ExtElC_HeaderFile
18 #define _Extrema_ExtElC_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <Standard_Boolean.hxx>
25 #include <Standard_Integer.hxx>
26 #include <Standard_Real.hxx>
27 #include <Extrema_POnCurv.hxx>
34 class Extrema_POnCurv;
37 //! It calculates all the distance between two elementary
39 //! These distances can be maximum or minimum.
47 Standard_EXPORT Extrema_ExtElC();
49 //! Calculates the distance between two lines.
50 //! AngTol is used to test if the lines are parallel:
51 //! Angle(C1,C2) < AngTol.
52 Standard_EXPORT Extrema_ExtElC(const gp_Lin& C1, const gp_Lin& C2, const Standard_Real AngTol);
54 //! Calculates the distance between a line and a
56 Standard_EXPORT Extrema_ExtElC(const gp_Lin& C1, const gp_Circ& C2, const Standard_Real Tol);
58 //! Calculates the distance between a line and an
60 Standard_EXPORT Extrema_ExtElC(const gp_Lin& C1, const gp_Elips& C2);
62 //! Calculates the distance between a line and a
64 Standard_EXPORT Extrema_ExtElC(const gp_Lin& C1, const gp_Hypr& C2);
66 //! Calculates the distance between a line and a
68 Standard_EXPORT Extrema_ExtElC(const gp_Lin& C1, const gp_Parab& C2);
70 //! Calculates the distance between two circles.
71 //! The circles can be parallel or identical.
72 Standard_EXPORT Extrema_ExtElC(const gp_Circ& C1, const gp_Circ& C2);
74 //! Returns True if the distances are found.
75 Standard_EXPORT Standard_Boolean IsDone() const;
77 //! Returns True if the two curves are parallel.
78 Standard_EXPORT Standard_Boolean IsParallel() const;
80 //! Returns the number of extremum distances.
81 Standard_EXPORT Standard_Integer NbExt() const;
83 //! Returns the value of the Nth extremum square distance.
84 Standard_EXPORT Standard_Real SquareDistance (const Standard_Integer N = 1) const;
86 //! Returns the points of the Nth extremum distance.
87 //! P1 is on the first curve, P2 on the second one.
88 Standard_EXPORT void Points (const Standard_Integer N, Extrema_POnCurv& P1, Extrema_POnCurv& P2) const;
95 //! Computes extrema in case when considered line and circle are in one plane
96 Standard_EXPORT Standard_Boolean PlanarLineCircleExtrema(const gp_Lin& C1,
106 Standard_Boolean myDone;
107 Standard_Boolean myIsPar;
108 Standard_Integer myNbExt;
109 Standard_Real mySqDist[6];
110 Extrema_POnCurv myPoint[6][2];
121 #endif // _Extrema_ExtElC_HeaderFile