// Created on: 2017-06-13
// Created by: Alexander MALYSHEV
// Copyright (c) 2017 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 _RWStl_HeaderFile
#define _RWStl_HeaderFile

#include <OSD_Path.hxx>
#include <Poly_Triangulation.hxx>
#include <Standard_Macro.hxx>
#include <Message_ProgressScope.hxx>
#include <NCollection_Sequence.hxx>

//! This class provides methods to read and write triangulation from / to the STL files.
class RWStl
{
public:

  //! Write triangulation to binary STL file.
  //! binary format of an STL file.
  //! Returns false if the cannot be opened;
  Standard_EXPORT static Standard_Boolean WriteBinary (const Handle(Poly_Triangulation)& theMesh,
                                                       const OSD_Path& thePath,
                                                       const Message_ProgressRange& theProgress = Message_ProgressRange());
  
  //! write the meshing in a file following the
  //! Ascii  format of an STL file.
  //! Returns false if the cannot be opened;
  Standard_EXPORT static Standard_Boolean WriteAscii (const Handle(Poly_Triangulation)& theMesh,
                                                      const OSD_Path& thePath,
                                                      const Message_ProgressRange& theProgress = Message_ProgressRange());
  
  //! Read specified STL file and returns its content as triangulation.
  //! In case of error, returns Null handle.
  Standard_EXPORT static Handle(Poly_Triangulation) ReadFile (const OSD_Path& theFile,
                                                              const Message_ProgressRange& theProgress = Message_ProgressRange());

  //! Read specified STL file and returns its content as triangulation.
  //! In case of error, returns Null handle.
  static Handle(Poly_Triangulation) ReadFile (const Standard_CString theFile,
                                              const Message_ProgressRange& theProgress = Message_ProgressRange())
  {
    return ReadFile (theFile, M_PI / 2.0, theProgress);
  }

  //! Read specified STL file and returns its content as triangulation.
  //! @param[in] theFile file path to read
  //! @param[in] theMergeAngle maximum angle in radians between triangles to merge equal nodes; M_PI/2 means ignore angle
  //! @param[in] theProgress progress indicator
  //! @return result triangulation or NULL in case of error
  Standard_EXPORT static Handle(Poly_Triangulation) ReadFile (const Standard_CString theFile,
                                                              const Standard_Real theMergeAngle,
                                                              const Message_ProgressRange& theProgress = Message_ProgressRange());
  
  //! Read specified STL file and fills triangulation list for multi-domain case.
  //! @param[in] theFile file path to read
  //! @param[in] theMergeAngle maximum angle in radians between triangles to merge equal nodes; M_PI/2 means ignore angle
  //! @param[out] theTriangList triangulation list for multi-domain case
  //! @param[in] theProgress progress indicator
  Standard_EXPORT static void ReadFile(const Standard_CString theFile,
                                       const Standard_Real theMergeAngle,
                                       NCollection_Sequence<Handle(Poly_Triangulation)>& theTriangList,
                                       const Message_ProgressRange& theProgress = Message_ProgressRange());
  
  //! Read triangulation from a binary STL file
  //! In case of error, returns Null handle.
  Standard_EXPORT static Handle(Poly_Triangulation) ReadBinary (const OSD_Path& thePath,
                                                                const Message_ProgressRange& theProgress = Message_ProgressRange());
  
  //! Read triangulation from an Ascii STL file
  //! In case of error, returns Null handle.
  Standard_EXPORT static Handle(Poly_Triangulation) ReadAscii (const OSD_Path& thePath,
                                                               const Message_ProgressRange& theProgress = Message_ProgressRange());

private:

  //! Write ASCII version.
  static Standard_Boolean writeASCII (const Handle(Poly_Triangulation)& theMesh,
                                      FILE *theFile,
                                      const Message_ProgressRange& theProgress);

  //! Write binary version.
  static Standard_Boolean writeBinary (const Handle(Poly_Triangulation)& theMesh,
                                       FILE *theFile,
                                       const Message_ProgressRange& theProgress);
};

#endif
