1 // Created on: 1991-02-26 2 // Created by: Isabelle GRIGNON 3 // Copyright (c) 1991-1999 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_LocECC_HeaderFile 18 #define _Extrema_LocECC_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_POnCurv.hxx> 27 #include <Extrema_SequenceOfPOnCurv.hxx> 28 29 class Standard_DomainError; 30 class StdFail_NotDone; 31 class Adaptor3d_Curve; 32 class Extrema_CurveTool; 33 class Extrema_POnCurv; 34 class gp_Pnt; 35 class gp_Vec; 36 class Extrema_CCLocFOfLocECC; 37 38 class Extrema_LocECC 39 { 40 public: 41 42 DEFINE_STANDARD_ALLOC 43 44 45 //! Calculates the distance with a close point. The 46 //! close point is defined by a parameter value on each 47 //! curve. 48 //! The function F(u,v)=distance(C1(u),C2(v)) has an 49 //! extremun when gradient(f)=0. The algorithm searches 50 //! the zero near the close point. 51 Standard_EXPORT Extrema_LocECC(const Adaptor3d_Curve& C1, const Adaptor3d_Curve& C2, const Standard_Real U0, const Standard_Real V0, const Standard_Real TolU, const Standard_Real TolV); 52 53 //! Returns True if the distance is found. 54 Standard_EXPORT Standard_Boolean IsDone() const; 55 56 //! Returns the value of the extremum square distance. 57 Standard_EXPORT Standard_Real SquareDistance() const; 58 59 //! Returns the points of the extremum distance. 60 //! P1 is on the first curve, P2 on the second one. 61 Standard_EXPORT void Point (Extrema_POnCurv& P1, Extrema_POnCurv& P2) const; 62 63 64 65 66 protected: 67 68 69 70 71 72 private: 73 74 75 76 Standard_Boolean myDone; 77 Standard_Real mySqDist; 78 Extrema_POnCurv myPoint1; 79 Extrema_POnCurv myPoint2; 80 81 82 }; 83 84 85 86 87 88 89 90 #endif // _Extrema_LocECC_HeaderFile 91