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
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_ExtCC_HeaderFile
18 #define _Extrema_ExtCC_HeaderFile
20 #include <Standard.hxx>
21 #include <Standard_DefineAlloc.hxx>
22 #include <Standard_Handle.hxx>
24 #include <Extrema_ECC.hxx>
25 #include <Standard_Boolean.hxx>
26 #include <Extrema_SequenceOfPOnCurv.hxx>
27 #include <TColStd_SequenceOfReal.hxx>
28 #include <Standard_Integer.hxx>
29 #include <Standard_Address.hxx>
30 #include <Standard_Real.hxx>
33 class Adaptor3d_Curve;
34 class Extrema_POnCurv;
40 //! It calculates all the distance between two curves.
41 //! These distances can be maximum or minimum.
49 Standard_EXPORT Extrema_ExtCC(const Standard_Real TolC1 = 1.0e-10, const Standard_Real TolC2 = 1.0e-10);
51 //! It calculates all the distances.
52 Standard_EXPORT Extrema_ExtCC(const Adaptor3d_Curve& C1, const Adaptor3d_Curve& C2, const Standard_Real TolC1 = 1.0e-10, const Standard_Real TolC2 = 1.0e-10);
54 //! It calculates all the distances.
55 Standard_EXPORT Extrema_ExtCC(const Adaptor3d_Curve& C1, const Adaptor3d_Curve& C2, const Standard_Real U1, const Standard_Real U2, const Standard_Real V1, const Standard_Real V2, const Standard_Real TolC1 = 1.0e-10, const Standard_Real TolC2 = 1.0e-10);
57 //! Initializes but does not perform algorithm.
58 Standard_EXPORT void Initialize (const Adaptor3d_Curve& C1,
59 const Adaptor3d_Curve& C2,
60 const Standard_Real TolC1 = 1.0e-10,
61 const Standard_Real TolC2 = 1.0e-10);
63 //! Initializes but does not perform algorithm.
64 Standard_EXPORT void Initialize (const Adaptor3d_Curve& C1,
65 const Adaptor3d_Curve& C2,
66 const Standard_Real U1,
67 const Standard_Real U2,
68 const Standard_Real V1,
69 const Standard_Real V2,
70 const Standard_Real TolC1 = 1.0e-10,
71 const Standard_Real TolC2 = 1.0e-10);
73 Standard_EXPORT void SetCurve (const Standard_Integer theRank, const Adaptor3d_Curve& C);
75 Standard_EXPORT void SetCurve (const Standard_Integer theRank, const Adaptor3d_Curve& C, const Standard_Real Uinf, const Standard_Real Usup);
77 Standard_EXPORT void SetRange (const Standard_Integer theRank, const Standard_Real Uinf, const Standard_Real Usup);
79 Standard_EXPORT void SetTolerance (const Standard_Integer theRank, const Standard_Real Tol);
81 Standard_EXPORT void Perform();
83 //! Returns True if the distances are found.
84 Standard_EXPORT Standard_Boolean IsDone() const;
86 //! Returns the number of extremum distances.
87 Standard_EXPORT Standard_Integer NbExt() const;
89 //! Returns True if the two curves are parallel.
90 Standard_EXPORT Standard_Boolean IsParallel() const;
92 //! Returns the value of the Nth extremum square distance.
93 Standard_EXPORT Standard_Real SquareDistance (const Standard_Integer N = 1) const;
95 //! Returns the points of the Nth extremum distance.
96 //! P1 is on the first curve, P2 on the second one.
97 Standard_EXPORT void Points (const Standard_Integer N, Extrema_POnCurv& P1, Extrema_POnCurv& P2) const;
99 //! if the curve is a trimmed curve,
100 //! dist11 is a square distance between the point on C1
101 //! of parameter FirstParameter and the point of
102 //! parameter FirstParameter on C2.
103 Standard_EXPORT void TrimmedSquareDistances (Standard_Real& dist11, Standard_Real& distP12, Standard_Real& distP21, Standard_Real& distP22, gp_Pnt& P11, gp_Pnt& P12, gp_Pnt& P21, gp_Pnt& P22) const;
105 //! Set flag for single extrema computation. Works on parametric solver only.
106 Standard_EXPORT void SetSingleSolutionFlag (const Standard_Boolean theSingleSolutionFlag);
108 //! Get flag for single extrema computation. Works on parametric solver only.
109 Standard_EXPORT Standard_Boolean GetSingleSolutionFlag () const;
113 //! Prepares the extrema result(s) for analytical cases (line, circle, ellipsis etc.)
114 Standard_EXPORT void PrepareResults (const Extrema_ExtElC& AlgExt,
115 const Standard_Boolean theIsInverse,
116 const Standard_Real Ut11,
117 const Standard_Real Ut12,
118 const Standard_Real Ut21,
119 const Standard_Real Ut22);
121 //! Prepares the extrema result(s) for general cases (e.g. with B-spline curves).
122 Standard_EXPORT void PrepareResults (const Extrema_ECC& AlgExt,
123 const Standard_Real Ut11,
124 const Standard_Real Ut12,
125 const Standard_Real Ut21,
126 const Standard_Real Ut22);
128 //! Prepares the extrema result(s) in case when the given curves are parallel.
129 Standard_EXPORT void PrepareParallelResult(const Standard_Real theUt11,
130 const Standard_Real theUt12,
131 const Standard_Real theUt21,
132 const Standard_Real theUt22,
133 const Standard_Real theSqDist);
135 // Clears all found extremas.
136 // This method does not change any flags (e.g. Done or IsParallel)
137 void ClearSolutions()
146 Extrema_ExtCC (Extrema_ExtCC& ) Standard_DELETE;
147 Extrema_ExtCC& operator= (Extrema_ExtCC& ) Standard_DELETE;
151 Standard_Boolean myIsFindSingleSolution; // Default value is false.
153 Standard_Boolean myDone;
154 Standard_Boolean myIsPar;
155 Extrema_SequenceOfPOnCurv mypoints;
156 TColStd_SequenceOfReal mySqDist;
157 const Adaptor3d_Curve* myC[2];
158 Standard_Real myInf[2];
159 Standard_Real mySup[2];
160 Standard_Real myTol[2];
165 Standard_Real mydist11;
166 Standard_Real mydist12;
167 Standard_Real mydist21;
168 Standard_Real mydist22;
172 #endif // _Extrema_ExtCC_HeaderFile