0024968: Impove BRepMesh_Classifier to cope with intersection of huge number of wires

BRepMesh_Classifier: Two-pass approach for intersection check with possibility to run it in parallel mode.
First pass - bounding boxes of segments are checked for overlapping;
Second pass - intersection point is calculated in case if overlapping is detected.

Make NCollection_UBTree::ChangeLastNode() exported due to compilation error on Linux platform.
Reason: method does not depend on template parameters, so it should be available.

Revert previous change and try to use another trick for Linux

Fix compilation warning on MacOS: remove redundant constant
Fix regressions: do not consider insignificant loops in case of self intersections on the same wire.
More sugar solution for compilation errors on NCollection_EBTree on Linux

Test cases for issue CR24968

src/BRepMesh/BRepMesh_Classifier.hxx

@@ -0,0 +1,79 @@
+// Created on: 2014-06-03
+// Created by: Oleg AGASHIN
+// Copyright (c) 1997-1999 Matra Datavision
+// Copyright (c) 1999-2014 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 _BRepMesh_Classifier_HeaderFile
+#define _BRepMesh_Classifier_HeaderFile
+
+#include <Standard.hxx>
+#include <Standard_DefineAlloc.hxx>
+#include <Standard_Macro.hxx>
+#include <BRepTopAdaptor_SeqOfPtr.hxx>
+#include <TColStd_SequenceOfBoolean.hxx>
+#include <TopAbs_State.hxx>
+#include <NCollection_Sequence.hxx>
+
+class gp_Pnt2d;
+class TColgp_SequenceOfPnt2d;
+
+//! Auxilary class contains information about correctness of discretized 
+//! face and used for classification of points regarding face internals.
+class BRepMesh_Classifier
+{
+public:
+
+  DEFINE_STANDARD_ALLOC
+
+  //! Constructor.
+  Standard_EXPORT BRepMesh_Classifier();
+
+  //! Destructor.
+  ~BRepMesh_Classifier()
+  {
+    Destroy();
+  }
+
+  //! Method is called on destruction.
+  //! Clears internal data structures.
+  Standard_EXPORT void Destroy();
+  
+  //! Performs classification of the given point regarding to face internals.
+  //! \param thePoint Point in parametric space to be classified.
+  //! \return 
+  Standard_EXPORT TopAbs_State Perform(const gp_Pnt2d& thePoint) const;
+
+  //! Registers wire specified by sequence of points for 
+  //! further classification of points.
+  //! \param theWire Wire to be registered. Specified by sequence of points.
+  //! \param theTolUV Tolerance to be used for calculations in parametric space.
+  //! \param theUmin Lower U boundary of the face in parametric space.
+  //! \param theUmax Upper U boundary of the face in parametric space.
+  //! \param theVmin Lower V boundary of the face in parametric space.
+  //! \param theVmax Upper V boundary of the face in parametric space.
+  void RegisterWire(
+    const NCollection_Sequence<gp_Pnt2d>& theWire,
+    const Standard_Real                   theTolUV,
+    const Standard_Real                   theUmin,
+    const Standard_Real                   theUmax,
+    const Standard_Real                   theVmin,
+    const Standard_Real                   theVmax);
+
+private:
+
+  BRepTopAdaptor_SeqOfPtr       myTabClass;
+  TColStd_SequenceOfBoolean     myTabOrient;
+};
+
+#endif