// Created: 1998-06-03 
// 
// Copyright (c) 1999-2013 OPEN CASCADE SAS 
// 
// This file is part of commercial software by OPEN CASCADE SAS, 
// furnished in accordance with the terms and conditions of the contract 
// and with the inclusion of this copyright notice. 
// This file or any part thereof may not be provided or otherwise 
// made available to any third party. 
// 
// No ownership title to the software is transferred hereby. 
// 
// OPEN CASCADE SAS makes no representation or warranties with respect to the 
// performance of this software, and specifically disclaims any responsibility 
// for any damages, special or consequential, connected with its use. 

#ifndef _GeomConvert_SurfToAnaSurf_HeaderFile
#define _GeomConvert_SurfToAnaSurf_HeaderFile

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

#include <Standard_Real.hxx>
#include <Standard_Boolean.hxx>
#include <GeomConvert_ConvType.hxx>
#include <GeomAbs_SurfaceType.hxx>
#include <TColgp_HArray1OfXYZ.hxx>
class Geom_Surface;
class Geom_SurfaceOfRevolution;
class Geom_Circle;

//! Converts a surface to the analitical form with given
//! precision. Conversion is done only the surface is bspline
//! of bezier and this can be approximed by some analytical
//! surface with that precision.
class GeomConvert_SurfToAnaSurf 
{
public:

  DEFINE_STANDARD_ALLOC
  
  Standard_EXPORT GeomConvert_SurfToAnaSurf();
  
  Standard_EXPORT GeomConvert_SurfToAnaSurf(const Handle(Geom_Surface)& S);
  
  Standard_EXPORT void Init (const Handle(Geom_Surface)& S);

  void SetConvType(const GeomConvert_ConvType theConvType = GeomConvert_Simplest)
  {
    myConvType = theConvType;
  }
  void SetTarget(const GeomAbs_SurfaceType theSurfType = GeomAbs_Plane)
  {
    myTarget = theSurfType;
  }

  //! Returns maximal deviation of converted surface from the original
  //! one computed by last call to ConvertToAnalytical
  Standard_Real Gap() const
  {
    return myGap;
  }
  
  //! Tries to convert the Surface to an Analytic form
  //! Returns the result
  //! In case of failure, returns a Null Handle
  //!
  Standard_EXPORT Handle(Geom_Surface) ConvertToAnalytical (const Standard_Real InitialToler);
  Standard_EXPORT Handle(Geom_Surface) ConvertToAnalytical (const Standard_Real InitialToler,
                                                            const Standard_Real Umin, const Standard_Real Umax,
                                                            const Standard_Real Vmin, const Standard_Real Vmax);
 
  //! Returns true if surfaces is same with the given tolerance
  Standard_EXPORT static Standard_Boolean IsSame (const Handle(Geom_Surface)& S1, const Handle(Geom_Surface)& S2, const Standard_Real tol);
  
  //! Returns true, if surface is canonical
  Standard_EXPORT static Standard_Boolean IsCanonical (const Handle(Geom_Surface)& S);

private:
  //!static method for checking surface of revolution
  //!To avoid two-parts cone-like surface
  static void CheckVTrimForRevSurf(const Handle(Geom_SurfaceOfRevolution)& aRevSurf,
    Standard_Real& V1, Standard_Real& V2);

  //!static method to try create cylindrical or conical surface
  static Handle(Geom_Surface) TryCylinerCone(const Handle(Geom_Surface)& theSurf, const Standard_Boolean theVCase,
    const Handle(Geom_Curve)& theUmidiso, const Handle(Geom_Curve)& theVmidiso,
    const Standard_Real theU1, const Standard_Real theU2, const Standard_Real theV1, const Standard_Real theV2,
    const Standard_Real theToler);

  //!static method to try create cylinrical surface using least square method
  static Standard_Boolean GetCylByLS(const Handle(TColgp_HArray1OfXYZ)& thePoints,
    const Standard_Real theTol,
    gp_Ax3& thePos, Standard_Real& theR,
    Standard_Real& theGap);

  //!static method to try create cylinrical surface based on its Gauss field
  static Handle(Geom_Surface) TryCylinderByGaussField(const Handle(Geom_Surface)& theSurf,
    const Standard_Real theU1, const Standard_Real theU2, const Standard_Real theV1, const Standard_Real theV2,
    const Standard_Real theToler, const Standard_Integer theNbU = 20, const Standard_Integer theNbV = 20,
    const Standard_Boolean theLeastSquare = Standard_False);

  //! static method to try create toroidal surface.
  //! In case <isTryUMajor> = Standard_True try to use V isoline radius as minor radaius.
  static Handle(Geom_Surface) TryTorusSphere(const Handle(Geom_Surface)& theSurf,
    const Handle(Geom_Circle)& circle,
    const Handle(Geom_Circle)& otherCircle,
    const Standard_Real Param1,
    const Standard_Real Param2,
    const Standard_Real aParam1ToCrv,
    const Standard_Real aParam2ToCrv,
    const Standard_Real toler,
    const Standard_Boolean isTryUMajor);

  static Standard_Real ComputeGap(const Handle(Geom_Surface)& theSurf,
    const Standard_Real theU1, const Standard_Real theU2, const Standard_Real theV1, const Standard_Real theV2,
    const Handle(Geom_Surface)& theNewSurf, const Standard_Real theTol = RealLast());




protected:

private:

  Handle(Geom_Surface) mySurf;
  Standard_Real myGap;
  GeomConvert_ConvType myConvType;
  GeomAbs_SurfaceType myTarget;

};


#endif // _GeomConvert_SurfToAnaSurf_HeaderFile