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 // Created on: 1994-03-10
 // Created by: Laurent BUCHARD
 // Copyright (c) 1994-1999 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 _TopClass_SolidExplorer_HeaderFile
 #define _TopClass_SolidExplorer_HeaderFile
 
 #include <Standard.hxx>
 #include <Standard_DefineAlloc.hxx>
 #include <Standard_Handle.hxx>
 
 #include <Standard_Boolean.hxx>
 #include <Standard_Real.hxx>
 class gp_Pnt;
 class gp_Lin;
 class TopoDS_Face;
 
 
 //! Provide an   exploration of a  BRep Shape   for the
 //! classification. Defines the description of a solid for the
 //! SolidClassifier.
 class TopClass_SolidExplorer 
 {
 public:
 
   DEFINE_STANDARD_ALLOC
 
   
   //! Should  return  True  if the  point  is  outside a
   //! bounding volume of the shape.
   Standard_EXPORT virtual Standard_Boolean Reject (const gp_Pnt& P) const = 0;
   
   //! Returns  in <L>, <Par>  a segment having at least
   //! one  intersection  with  the  shape  boundary  to
   //! compute  intersections.
   Standard_EXPORT virtual void Segment (const gp_Pnt& P, gp_Lin& L, Standard_Real& Par) = 0;
   
   //! Returns  in <L>, <Par>  a segment having at least
   //! one  intersection  with  the  shape  boundary  to
   //! compute  intersections.
   //!
   //! The First Call to this method returns a line which
   //! point to a point of the first face of the shape.
   //! The Second Call provide a line to the second face
   //! and so on.
   //!
   //! if the method is called N times on a shape with F
   //! faces (N>F) the line point to other points on the
   //! face 1,2,3 ... N
   Standard_EXPORT virtual void OtherSegment (const gp_Pnt& P, gp_Lin& L, Standard_Real& Par) = 0;
   
   //! Starts an exploration of the shells.
   Standard_EXPORT virtual void InitShell() = 0;
   
   //! Returns True if there is  a current shell.
   Standard_EXPORT virtual Standard_Boolean MoreShells() const = 0;
   
   //! Sets the explorer  to the  next  shell and  returns
   //! False if there are no more wires.
   Standard_EXPORT virtual void NextShell() = 0;
   
   //! Returns True  if the shell  bounding volume does not
   //! intersect the segment.
   Standard_EXPORT virtual Standard_Boolean RejectShell (const gp_Lin& L, const Standard_Real Par) const = 0;
   
   //! Starts an exploration of the faces.
   Standard_EXPORT virtual void InitFace() = 0;
   
   //! Returns True if there is  a current face.
   Standard_EXPORT virtual Standard_Boolean MoreFaces() const = 0;
   
   //! Sets the explorer  to the  next  face and  returns
   //! False if there are no more wires.
   Standard_EXPORT virtual void NextFace() = 0;
   
   //! Returns the current face.
   Standard_EXPORT virtual TopoDS_Face CurrentFace() const = 0;
   
   //! Returns True  if the face  bounding volume does not
   //! intersect the segment.
   Standard_EXPORT virtual Standard_Boolean RejectFace (const gp_Lin& L, const Standard_Real Par) const = 0;
 
 
 
 
 protected:
 
 
 
 
 
 private:
 
 
 
 
 
 };
 
 
 
 
 
 
 
 #endif // _TopClass_SolidExplorer_HeaderFile

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