include/opencascade/BRepMesh_Triangulator.hxx

0001 // Created: 2017-12-28
0002 //
0003 // Copyright (c) 2017 OPEN CASCADE SAS
0004 //
0005 // This file is part of Open CASCADE Technology software library.
0006 //
0007 // This library is free software; you can redistribute it and/or modify it under
0008 // the terms of the GNU Lesser General Public License version 2.1 as published
0009 // by the Free Software Foundation, with special exception defined in the file
0010 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0011 // distribution for complete text of the license and disclaimer of any warranty.
0012 //
0013 // Alternatively, this file may be used under the terms of Open CASCADE
0014 // commercial license or contractual agreement.
0015
0016 #ifndef _BRepMesh_Triangulator_HeaderFile
0017 #define _BRepMesh_Triangulator_HeaderFile
0018
0019 #include <gp_Pln.hxx>
0020 #include <Poly_Triangulation.hxx>
0021 #include <IMeshData_Types.hxx>
0022 #include <NCollection_Vector.hxx>
0023 #include <NCollection_List.hxx>
0024 #include <NCollection_Shared.hxx>
0025 #include <TColStd_SequenceOfInteger.hxx>
0026 #include <TColStd_DataMapOfIntegerInteger.hxx>
0027 #include <BRepMesh_DataStructureOfDelaun.hxx>
0028
0029 class Message_Messenger;
0030
0031 //! Auxiliary tool to generate triangulation
0032 class BRepMesh_Triangulator
0033 {
0034 public:
0035   DEFINE_STANDARD_ALLOC
0036
0037   //! Performs conversion of the given list of triangles to Poly_Triangulation.
0038   Standard_EXPORT static Handle(Poly_Triangulation) ToPolyTriangulation(
0039     const TColgp_Array1OfPnt&              theNodes,
0040     const NCollection_List<Poly_Triangle>& thePolyTriangles);
0041
0042 public:
0043   //! Constructor. Initialized tool by the given parameters.
0044   Standard_EXPORT BRepMesh_Triangulator(const NCollection_Vector<gp_XYZ>&                  theXYZs,
0045                                         const NCollection_List<TColStd_SequenceOfInteger>& theWires,
0046                                         const gp_Dir&                                      theNorm);
0047
0048   //! Performs triangulation of source wires and stores triangles the output list.
0049   Standard_EXPORT Standard_Boolean Perform(NCollection_List<Poly_Triangle>& thePolyTriangles);
0050
0051   //! Set messenger for output information
0052   //! without this Message::DefaultMessenger() will be used
0053   void SetMessenger(const Handle(Message_Messenger)& theMess) { myMess = theMess; }
0054
0055   BRepMesh_Triangulator& operator=(const BRepMesh_Triangulator& theOther);
0056
0057 private:
0058   // auxiliary for makeTrianglesUsingBRepMesh
0059   void addTriange34(const TColStd_SequenceOfInteger& theW,
0060                     NCollection_List<Poly_Triangle>& thePolyTriangles);
0061
0062   // auxiliary for addTriange34
0063   Standard_Boolean checkCondition(const int (&theNodes)[4],
0064                                   const TColStd_SequenceOfInteger& theWire);
0065
0066   // performs initialization of mesh data structure.
0067   Standard_Boolean prepareMeshStructure();
0068
0069   // auxiliary for triangulation
0070   Standard_Boolean triangulate(NCollection_List<Poly_Triangle>& thePolyTriangles);
0071
0072 private:
0073   const NCollection_Vector<gp_XYZ>&                  myXYZs;
0074   const NCollection_List<TColStd_SequenceOfInteger>& myWires;
0075   gp_Pln                                             myPlane;
0076   Handle(Message_Messenger)                          myMess;
0077
0078   Handle(BRepMesh_DataStructureOfDelaun) myMeshStructure;
0079   TColStd_DataMapOfIntegerInteger        myTmpMap;
0080   Handle(IMeshData::VectorOfInteger)     myIndices;
0081 };
0082
0083 #endif // _BRepMesh_Triangulator_HeaderFile