OCCT

// Created on: 1990-12-20
// Created by: Remi Lequette
// Copyright (c) 1990-1999 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 _TopExp_HeaderFile
#define _TopExp_HeaderFile

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

#include <TopTools_ShapeMapHasher.hxx>
#include <NCollection_IndexedMap.hxx>
#include <TopoDS_Shape.hxx>
#include <NCollection_List.hxx>
#include <NCollection_IndexedDataMap.hxx>
#include <NCollection_Map.hxx>
#include <TopoDS_Vertex.hxx>
#include <Standard_Boolean.hxx>

class TopoDS_Shape;
class TopoDS_Edge;
class TopoDS_Wire;

//! This package provides basic tools to explore the
//! topological data structures.
//!
//! * Explorer: A tool to find all sub-shapes of a given
//! type. e.g. all faces of a solid.
//!
//! * Package methods to map sub-shapes of a shape.
//!
//! Level : Public
//! All methods of all classes will be public.
class TopExp
{
public:
  DEFINE_STANDARD_ALLOC

  //! Tool to explore a topological data structure.
  //! Stores in the map <M> all the sub-shapes of <S>
  //! of type <T>.
  //!
  //! Warning: The map is not cleared at first.
  Standard_EXPORT static void MapShapes(
    const TopoDS_Shape&                                            S,
    const TopAbs_ShapeEnum                                         T,
    NCollection_IndexedMap<TopoDS_Shape, TopTools_ShapeMapHasher>& M);

  //! Stores in the map <M> all the sub-shapes of <S>.
  //! - If cumOri is true, the function composes all
  //! sub-shapes with the orientation of S.
  //! - If cumLoc is true, the function multiplies all
  //! sub-shapes by the location of S, i.e. it applies to
  //! each sub-shape the transformation that is associated with S.
  Standard_EXPORT static void MapShapes(
    const TopoDS_Shape&                                            S,
    NCollection_IndexedMap<TopoDS_Shape, TopTools_ShapeMapHasher>& M,
    const bool                                                     cumOri = true,
    const bool                                                     cumLoc = true);

  //! Stores in the map <M> all the sub-shapes of <S>.
  //! - If cumOri is true, the function composes all
  //! sub-shapes with the orientation of S.
  //! - If cumLoc is true, the function multiplies all
  //! sub-shapes by the location of S, i.e. it applies to
  //! each sub-shape the transformation that is associated with S.
  Standard_EXPORT static void MapShapes(const TopoDS_Shape&                                     S,
                                        NCollection_Map<TopoDS_Shape, TopTools_ShapeMapHasher>& M,
                                        const bool cumOri = true,
                                        const bool cumLoc = true);

  //! Stores in the map <M> all the subshape of <S> of
  //! type <TS> for each one append to the list all
  //! the ancestors of type <TA>. For example map all
  //! the edges and bind the list of faces.
  //! Warning: The map is not cleared at first.
  Standard_EXPORT static void MapShapesAndAncestors(
    const TopoDS_Shape&                                  S,
    const TopAbs_ShapeEnum                               TS,
    const TopAbs_ShapeEnum                               TA,
    NCollection_IndexedDataMap<TopoDS_Shape,
                               NCollection_List<TopoDS_Shape>,
                               TopTools_ShapeMapHasher>& M);

  //! Stores in the map <M> all the subshape of <S> of
  //! type <TS> for each one append to the list all
  //! unique ancestors of type <TA>. For example map all
  //! the edges and bind the list of faces.
  //! useOrientation = True : taking account the ancestor orientation
  //! Warning: The map is not cleared at first.
  Standard_EXPORT static void MapShapesAndUniqueAncestors(
    const TopoDS_Shape&                                  S,
    const TopAbs_ShapeEnum                               TS,
    const TopAbs_ShapeEnum                               TA,
    NCollection_IndexedDataMap<TopoDS_Shape,
                               NCollection_List<TopoDS_Shape>,
                               TopTools_ShapeMapHasher>& M,
    const bool                                           useOrientation = false);

  //! Returns the Vertex of orientation FORWARD in E. If
  //! there is none returns a Null Shape.
  //! CumOri = True : taking account the edge orientation
  Standard_EXPORT static TopoDS_Vertex FirstVertex(const TopoDS_Edge& E, const bool CumOri = false);

  //! Returns the Vertex of orientation REVERSED in E. If
  //! there is none returns a Null Shape.
  //! CumOri = True : taking account the edge orientation
  Standard_EXPORT static TopoDS_Vertex LastVertex(const TopoDS_Edge& E, const bool CumOri = false);

  //! Returns in Vfirst, Vlast the FORWARD and REVERSED
  //! vertices of the edge <E>. May be null shapes.
  //! CumOri = True : taking account the edge orientation
  Standard_EXPORT static void Vertices(const TopoDS_Edge& E,
                                       TopoDS_Vertex&     Vfirst,
                                       TopoDS_Vertex&     Vlast,
                                       const bool         CumOri = false);

  //! Returns in Vfirst, Vlast the first and last
  //! vertices of the open wire <W>. May be null shapes.
  //! if <W> is closed Vfirst and Vlast are a same
  //! vertex on <W>.
  //! if <W> is no manifold. VFirst and VLast are null
  //! shapes.
  Standard_EXPORT static void Vertices(const TopoDS_Wire& W,
                                       TopoDS_Vertex&     Vfirst,
                                       TopoDS_Vertex&     Vlast);

  //! Finds the vertex <V> common to the two edges
  //! <E1,E2>, returns True if this vertex exists.
  //!
  //! Warning: <V> has sense only if the value <True> is returned
  Standard_EXPORT static bool CommonVertex(const TopoDS_Edge& E1,
                                           const TopoDS_Edge& E2,
                                           TopoDS_Vertex&     V);
};

#endif // _TopExp_HeaderFile