OCCT

// Created on: 1993-07-06
// Created by: Yves FRICAUD
// Copyright (c) 1993-1999 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 _BRepMAT2d_BisectingLocus_HeaderFile
#define _BRepMAT2d_BisectingLocus_HeaderFile

#include <Standard.hxx>
#include <Standard_DefineAlloc.hxx>
#include <Standard_Handle.hxx>

#include <MAT2d_Tool2d.hxx>
#include <Standard_Integer.hxx>
#include <MAT2d_BiInt.hxx>
#include <NCollection_DataMap.hxx>
#include <MAT_Side.hxx>
#include <GeomAbs_JoinType.hxx>
#include <MAT_BasicElt.hxx>
class MAT_Graph;
class BRepMAT2d_Explorer;
class MAT_BasicElt;
class Geom2d_Geometry;
class gp_Pnt2d;
class MAT_Node;
class Bisector_Bisec;
class MAT_Arc;

//! BisectingLocus generates and contains the Bisecting_Locus
//! of a set of lines from Geom2d, defined by <ExploSet>.
//!
//! If the set of lines contains closed lines:
//! ------------------------------------------
//! These lines cut the plane in areas.
//! One map can be computed for each area.
//!
//! Bisecting locus computes a map in an area.
//! The area is defined by a side (MAT_Left,MAT_Right)
//! on one of the closed lines.
//!
//! If the set of lines contains only open lines:
//! --------------------------------------------
//! the map recovers all the plane.
//!
//! Warning: Assume the orientation of the closed lines are
//! compatible.
//!
//! Assume the explo contains only lines located in the
//! area where the bisecting locus will be computed.
//!
//! Assume a line don't cross itself or an other line.
//!
//! Remark:
//! the curves coming from the explorer can be
//! decomposed in different parts. It the case for the
//! curves other than circles or lines.
//!
//! The map of bisecting locus is described by a graph.
//! - The BasicsElements correspond to elements on
//! the figure described by the Explorer from BRepMAT2d.
//! - The Arcs correspond to the bisectors.
//! - The Nodes are the extremities of the arcs.
class BRepMAT2d_BisectingLocus
{
public:
  DEFINE_STANDARD_ALLOC

  Standard_EXPORT BRepMAT2d_BisectingLocus();

  //! Computation of the Bisector_Locus in a set of Lines
  //! defined in <anExplo>.
  //! The bisecting locus are computed on the side <aSide>
  //! from the line <LineIndex> in <anExplo>.
  Standard_EXPORT void Compute(BRepMAT2d_Explorer&    anExplo,
                               const int              LineIndex    = 1,
                               const MAT_Side         aSide        = MAT_Left,
                               const GeomAbs_JoinType aJoinType    = GeomAbs_Arc,
                               const bool             IsOpenResult = false);

  //! Returns True if Compute has succeeded.
  Standard_EXPORT bool IsDone() const;

  //! Returns <theGraph> of <me>.
  Standard_EXPORT occ::handle<MAT_Graph> Graph() const;

  //! Returns the number of contours.
  Standard_EXPORT int NumberOfContours() const;

  //! Returns the number of BasicElts on the line
  //! <IndLine>.
  Standard_EXPORT int NumberOfElts(const int IndLine) const;

  //! Returns the number of sections of a curve.
  //! this curve is the Indexth curve in the IndLineth contour
  //! given by anExplo.
  Standard_EXPORT int NumberOfSections(const int IndLine, const int Index) const;

  //! Returns the BasicElts located at the position
  //! <Index> on the contour designed by <IndLine>.
  //! Remark: the BasicElts on a contour are sorted.
  Standard_EXPORT occ::handle<MAT_BasicElt> BasicElt(const int IndLine, const int Index) const;

  //! Returns the geometry linked to the <BasicElt>.
  Standard_EXPORT occ::handle<Geom2d_Geometry> GeomElt(
    const occ::handle<MAT_BasicElt>& aBasicElt) const;

  //! Returns the geometry of type <gp> linked to
  //! the <Node>.
  Standard_EXPORT gp_Pnt2d GeomElt(const occ::handle<MAT_Node>& aNode) const;

  //! Returns the geometry of type <Bissec>
  //! linked to the arc <ARC>.
  //! <Reverse> is False when the FirstNode of <anArc>
  //! correspond to the first point of geometry.
  Standard_EXPORT Bisector_Bisec GeomBis(const occ::handle<MAT_Arc>& anArc, bool& Reverse) const;

private:
  Standard_EXPORT void Fusion();

  Standard_EXPORT void RenumerationAndFusion(
    const int                                            IndexLine,
    const int                                            LengthLine,
    int&                                                 IndexLast,
    NCollection_DataMap<int, occ::handle<MAT_BasicElt>>& NewMap);

  occ::handle<MAT_Graph>                theGraph;
  MAT2d_Tool2d                          theTool;
  bool                                  isDone;
  NCollection_DataMap<MAT2d_BiInt, int> nbSect;
  int                                   nbContours;
};

#endif // _BRepMAT2d_BisectingLocus_HeaderFile