include/opencascade/IntPatch_Line.hxx

0001 // Created on: 1992-05-06
0002 // Created by: Jacques GOUSSARD
0003 // Copyright (c) 1992-1999 Matra Datavision
0004 // Copyright (c) 1999-2014 OPEN CASCADE SAS
0005 //
0006 // This file is part of Open CASCADE Technology software library.
0007 //
0008 // This library is free software; you can redistribute it and/or modify it under
0009 // the terms of the GNU Lesser General Public License version 2.1 as published
0010 // by the Free Software Foundation, with special exception defined in the file
0011 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0012 // distribution for complete text of the license and disclaimer of any warranty.
0013 //
0014 // Alternatively, this file may be used under the terms of Open CASCADE
0015 // commercial license or contractual agreement.
0016
0017 #ifndef _IntPatch_Line_HeaderFile
0018 #define _IntPatch_Line_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_Type.hxx>
0022
0023 #include <IntPatch_IType.hxx>
0024 #include <IntSurf_TypeTrans.hxx>
0025 #include <IntSurf_Situation.hxx>
0026 #include <Standard_Transient.hxx>
0027
0028 //! Definition of an intersection line between two
0029 //! surfaces.
0030 //! A line may be either geometric : line, circle, ellipse,
0031 //! parabola, hyperbola, as defined in the class GLine,
0032 //! or analytic, as defined in the class ALine, or defined
0033 //! by a set of points (coming from a walking algorithm) as
0034 //! defined in the class WLine.
0035 class IntPatch_Line : public Standard_Transient
0036 {
0037
0038 public:
0039   //! To set the values returned by IsUIsoS1,....
0040   //! The default values are False.
0041   void SetValue(const bool Uiso1, const bool Viso1, const bool Uiso2, const bool Viso2);
0042
0043   //! Returns the type of geometry 3d (Line, Circle, Parabola,
0044   //! Hyperbola, Ellipse, Analytic, Walking, Restriction)
0045   IntPatch_IType ArcType() const;
0046
0047   //! Returns TRUE if the intersection is a line of tangency
0048   //! between the 2 patches.
0049   bool IsTangent() const;
0050
0051   //! Returns the type of the transition of the line
0052   //! for the first surface. The transition is "constant"
0053   //! along the line.
0054   //! The transition is IN if the line is oriented in such
0055   //! a way that the system of vector (N1,N2,T) is right-handed,
0056   //! where N1 is the normal to the first surface at a point P,
0057   //! N2 is the normal to the second surface at a point P,
0058   //! T is the tangent to the intersection line at P.
0059   //! If the system of vector is left-handed, the transition
0060   //! is OUT.
0061   //! When N1 and N2 are colinear all along the intersection
0062   //! line, the transition will be
0063   //! - TOUCH, if it is possible to use the 2nd derivatives
0064   //! to determine the position of one surafce compared
0065   //! to the other (see Situation)
0066   //! - UNDECIDED otherwise.
0067   //!
0068   //! If one of the transition is TOUCH or UNDECIDED, the other
0069   //! one has got the same value.
0070   IntSurf_TypeTrans TransitionOnS1() const;
0071
0072   //! Returns the type of the transition of the line
0073   //! for the second surface. The transition is "constant"
0074   //! along the line.
0075   IntSurf_TypeTrans TransitionOnS2() const;
0076
0077   //! Returns the situation (INSIDE/OUTSIDE/UNKNOWN) of
0078   //! the first patch compared to the second one, when
0079   //! TransitionOnS1 or TransitionOnS2 returns TOUCH.
0080   //! Otherwise, an exception is raised.
0081   IntSurf_Situation SituationS1() const;
0082
0083   //! Returns the situation (INSIDE/OUTSIDE/UNKNOWN) of
0084   //! the second patch compared to the first one, when
0085   //! TransitionOnS1 or TransitionOnS2 returns TOUCH.
0086   //! Otherwise, an exception is raised.
0087   IntSurf_Situation SituationS2() const;
0088
0089   //! Returns TRUE if the intersection is a U isoparametric curve
0090   //! on the first patch.
0091   bool IsUIsoOnS1() const;
0092
0093   //! Returns TRUE if the intersection is a V isoparametric curve
0094   //! on the first patch.
0095   bool IsVIsoOnS1() const;
0096
0097   //! Returns TRUE if the intersection is a U isoparametric curve
0098   //! on the second patch.
0099   bool IsUIsoOnS2() const;
0100
0101   //! Returns TRUE if the intersection is a V isoparametric curve
0102   //! on the second patch.
0103   bool IsVIsoOnS2() const;
0104
0105   DEFINE_STANDARD_RTTIEXT(IntPatch_Line, Standard_Transient)
0106
0107 protected:
0108   //! To initialize the fields, when the transitions
0109   //! are In or Out.
0110   Standard_EXPORT IntPatch_Line(const bool              Tang,
0111                                 const IntSurf_TypeTrans Trans1,
0112                                 const IntSurf_TypeTrans Trans2);
0113
0114   //! To initialize the fields, when the transitions
0115   //! are Touch.
0116   Standard_EXPORT IntPatch_Line(const bool              Tang,
0117                                 const IntSurf_Situation Situ1,
0118                                 const IntSurf_Situation Situ2);
0119
0120   //! To initialize the fields, when the transitions
0121   //! are Undecided.
0122   Standard_EXPORT IntPatch_Line(const bool Tang);
0123
0124   IntPatch_IType typ;
0125
0126 private:
0127   bool              tg;
0128   IntSurf_TypeTrans tS1;
0129   IntSurf_TypeTrans tS2;
0130   IntSurf_Situation sit1;
0131   IntSurf_Situation sit2;
0132   bool              uS1;
0133   bool              vS1;
0134   bool              uS2;
0135   bool              vS2;
0136 };
0137
0138 #include <IntPatch_Line.lxx>
0139
0140 #endif // _IntPatch_Line_HeaderFile