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 // Created on: 2000-11-16
 // Created by: Peter KURNEV
 // Copyright (c) 2000-2014 OPEN CASCADE SAS
 //
 // This file is part of Open CASCADE Technology software library.
 //
 // This library is free software; you can redistribute it and/or modify it under
 // the terms of the GNU Lesser General Public License version 2.1 as published
 // by the Free Software Foundation, with special exception defined in the file
 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
 // distribution for complete text of the license and disclaimer of any warranty.
 //
 // Alternatively, this file may be used under the terms of Open CASCADE
 // commercial license or contractual agreement.
 
 #ifndef _IntTools_Tools_HeaderFile
 #define _IntTools_Tools_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 #include <Standard_Handle.hxx>
 
 #include <Standard_Integer.hxx>
 #include <TopAbs_State.hxx>
 #include <IntTools_SequenceOfCurves.hxx>
 #include <Precision.hxx>
 class TopoDS_Vertex;
 class TopoDS_Wire;
 class TopoDS_Face;
 class gp_Pnt2d;
 class TopoDS_Edge;
 class IntTools_CommonPrt;
 class gp_Pnt;
 class IntTools_Curve;
 class gp_Dir;
 class Geom_Curve;
 class Bnd_Box;
 class IntTools_Range;
 class gp_Lin;
 class gp_Pln;
 class Geom2d_Curve;
 class Geom_Surface;
 
 
 
 //! The class contains handy static functions
 //! dealing with the geometry and topology.
 class IntTools_Tools 
 {
 public:
 
   DEFINE_STANDARD_ALLOC
 
   
 
   //! Computes distance between vertex V1 and vertex V2,
   //! if the distance is less than sum of vertex tolerances
   //! returns zero,
   //! otherwise returns negative value
   Standard_EXPORT static Standard_Integer ComputeVV (const TopoDS_Vertex& V1, const TopoDS_Vertex& V2);
   
 
   //! Returns True if wire aW contains edges
   //! with INTERNAL orientation
   Standard_EXPORT static Standard_Boolean HasInternalEdge (const TopoDS_Wire& aW);
   
 
   //! Build a face based on surface of given face aF
   //! and bounded by wire aW
   Standard_EXPORT static void MakeFaceFromWireAndFace (const TopoDS_Wire& aW, const TopoDS_Face& aF, TopoDS_Face& aFNew);
   
   Standard_EXPORT static TopAbs_State ClassifyPointByFace (const TopoDS_Face& aF, const gp_Pnt2d& P);
   
 
   //! Computes square distance between a point on the edge E
   //! corresponded to parameter t and vertices of edge E.
   //! Returns True if this distance is less than square
   //! tolerance of vertex, otherwise returns false.
   Standard_EXPORT static Standard_Boolean IsVertex (const TopoDS_Edge& E, const Standard_Real t);
   
 
   //! Returns True if square distance between vertex V
   //! and a point on the edge E corresponded to parameter t
   //! is less than square tolerance of V
   Standard_EXPORT static Standard_Boolean IsVertex (const TopoDS_Edge& E, const TopoDS_Vertex& V, const Standard_Real t);
   
 
   //! Returns True if IsVertx for middle parameter of fist range
   //! and first edge returns True
   //! and if IsVertex for middle parameter of second range and
   //! second range returns True,
   //! otherwise returns False
   Standard_EXPORT static Standard_Boolean IsVertex (const IntTools_CommonPrt& aCmnPrt);
   
 
   //! Gets boundary of parameters of E1 and E2.
   //! Computes 3d points on each corresponded to average parameters.
   //! Returns True if distance between computed points is less than
   //! sum of edge tolerance, otherwise returns False.
   Standard_EXPORT static Standard_Boolean IsMiddlePointsEqual (const TopoDS_Edge& E1, const TopoDS_Edge& E2);
   
 
   //! Returns True if the distance between point aP and
   //! vertex aV is less or equal to sum of aTolPV and
   //! vertex tolerance, otherwise returns False
   Standard_EXPORT static Standard_Boolean IsVertex (const gp_Pnt& aP, const Standard_Real aTolPV, const TopoDS_Vertex& aV);
   
 
   //! Returns some value between aFirst and aLast
   Standard_EXPORT static Standard_Real IntermediatePoint (const Standard_Real aFirst, const Standard_Real aLast);
   
 
   //! Split aC by average parameter if aC is closed in 3D.
   //! Returns positive value if splitting has been done,
   //! otherwise returns zero.
   Standard_EXPORT static Standard_Integer SplitCurve (const IntTools_Curve& aC, IntTools_SequenceOfCurves& aS);
   
 
   //! Puts curves from aSIn to aSOut except those curves that
   //! are coincide with first curve from aSIn.
   Standard_EXPORT static void RejectLines (const IntTools_SequenceOfCurves& aSIn, IntTools_SequenceOfCurves& aSOut);
   
 
   //! Returns True if D1 and D2 coincide
   Standard_EXPORT static Standard_Boolean IsDirsCoinside (const gp_Dir& D1, const gp_Dir& D2);
   
 
   //! Returns True if D1 and D2 coincide with given tolerance
   Standard_EXPORT static Standard_Boolean IsDirsCoinside (const gp_Dir& D1, const gp_Dir& D2, const Standard_Real aTol);
   
 
   //! Returns True if aC is BoundedCurve from Geom and
   //! the distance between first point
   //! of the curve aC and last point
   //! is less than 1.e-12
   Standard_EXPORT static Standard_Boolean IsClosed (const Handle(Geom_Curve)& aC);
   
 
   //! Returns adaptive tolerance for given aTolBase
   //! if aC is trimmed curve and basis curve is parabola,
   //! otherwise returns value of aTolBase
   Standard_EXPORT static Standard_Real CurveTolerance (const Handle(Geom_Curve)& aC, const Standard_Real aTolBase);
 
   //! Checks if the curve is not covered by the default tolerance (confusion).<br>
   //! Builds bounding box for the curve and stores it into <theBox>.
   Standard_EXPORT static Standard_Boolean CheckCurve(const IntTools_Curve& theCurve,
                                                      Bnd_Box& theBox);
   
   Standard_EXPORT static Standard_Boolean IsOnPave (const Standard_Real theT, const IntTools_Range& theRange, const Standard_Real theTol);
   
   Standard_EXPORT static void VertexParameters (const IntTools_CommonPrt& theCP, Standard_Real& theT1, Standard_Real& theT2);
   
   Standard_EXPORT static void VertexParameter (const IntTools_CommonPrt& theCP, Standard_Real& theT);
   
   Standard_EXPORT static Standard_Boolean IsOnPave1 (const Standard_Real theT, const IntTools_Range& theRange, const Standard_Real theTol);
   
   //! Checks if the range <theR> interfere with the range <theRRef>
   Standard_EXPORT static Standard_Boolean IsInRange (const IntTools_Range& theRRef, const IntTools_Range& theR, const Standard_Real theTol);
   
   Standard_EXPORT static Standard_Integer SegPln (const gp_Lin& theLin, const Standard_Real theTLin1, const Standard_Real theTLin2, const Standard_Real theTolLin, const gp_Pln& thePln, const Standard_Real theTolPln, gp_Pnt& theP, Standard_Real& theT, Standard_Real& theTolP, Standard_Real& theTmin, Standard_Real& theTmax);
   
 
   //! Computes the max distance between points
   //! taken from 3D and 2D curves by the same parameter
   Standard_EXPORT static
     Standard_Boolean ComputeTolerance(const Handle(Geom_Curve)& theCurve3D,
                                       const Handle(Geom2d_Curve)& theCurve2D,
                                       const Handle(Geom_Surface)& theSurf,
                                       const Standard_Real theFirst,
                                       const Standard_Real theLast,
                                       Standard_Real& theMaxDist,
                                       Standard_Real& theMaxPar,
                                       const Standard_Real theTolRange = Precision::PConfusion(),
                                       const Standard_Boolean theToRunParallel = Standard_False);
 
 
   //! Computes the correct Intersection range for 
   //! Line/Line, Line/Plane and Plane/Plane intersections
   Standard_EXPORT static Standard_Real ComputeIntRange(const Standard_Real theTol1,
                                                        const Standard_Real theTol2,
                                                        const Standard_Real theAngle);
 
 
 protected:
 
 
 
 
 
 private:
 
 
 
 
 
 };
 
 
 
 
 
 
 
 #endif // _IntTools_Tools_HeaderFile

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