1 // Created on: 1994-07-06 2 // Created by: Laurent PAINNOT 3 // Copyright (c) 1994-1999 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 _Extrema_LocateExtCC2d_HeaderFile 18 #define _Extrema_LocateExtCC2d_HeaderFile 19 20 #include <Standard.hxx> 21 #include <Standard_DefineAlloc.hxx> 22 #include <Standard_Handle.hxx> 23 24 #include <Standard_Boolean.hxx> 25 #include <Standard_Real.hxx> 26 #include <Extrema_POnCurv2d.hxx> 27 class Adaptor2d_Curve2d; 28 29 30 //! It calculates the distance between two curves with 31 //! a close point; these distances can be maximum or 32 //! minimum. 33 class Extrema_LocateExtCC2d 34 { 35 public: 36 37 DEFINE_STANDARD_ALLOC 38 39 40 //! Calculates the distance with a close point. The 41 //! close point is defined by a parameter value on each 42 //! curve. 43 //! The function F(u,v)=distance(C1(u),C2(v)) has an 44 //! extremun when gradient(f)=0. The algorithm searches 45 //! the zero near the close point. 46 Standard_EXPORT Extrema_LocateExtCC2d(const Adaptor2d_Curve2d& C1, const Adaptor2d_Curve2d& C2, const Standard_Real U0, const Standard_Real V0); 47 48 //! Returns True if the distance is found. 49 Standard_EXPORT Standard_Boolean IsDone() const; 50 51 //! Returns the value of the extremum square distance. 52 Standard_EXPORT Standard_Real SquareDistance() const; 53 54 //! Returns the points of the extremum distance. 55 //! P1 is on the first curve, P2 on the second one. 56 Standard_EXPORT void Point (Extrema_POnCurv2d& P1, Extrema_POnCurv2d& P2) const; 57 58 59 60 61 protected: 62 63 64 65 66 67 private: 68 69 70 71 Standard_Boolean myDone; 72 Standard_Real mySqDist; 73 Extrema_POnCurv2d myPoint1; 74 Extrema_POnCurv2d myPoint2; 75 76 77 }; 78 79 80 81 82 83 84 85 #endif // _Extrema_LocateExtCC2d_HeaderFile 86