include/opencascade/Convert_SphereToBSplineSurface.hxx

0001 // Created on: 1991-10-10
0002 // Created by: Jean Claude VAUTHIER
0003 // Copyright (c) 1991-1999 Matra Datavision
0004 // Copyright (c) 1999-2014 OPEN CASCADE SAS
0005 //
0006 // This file is part of Open CASCADE Technology software library.
0007 //
0008 // This library is free software; you can redistribute it and/or modify it under
0009 // the terms of the GNU Lesser General Public License version 2.1 as published
0010 // by the Free Software Foundation, with special exception defined in the file
0011 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
0012 // distribution for complete text of the license and disclaimer of any warranty.
0013 //
0014 // Alternatively, this file may be used under the terms of Open CASCADE
0015 // commercial license or contractual agreement.
0016
0017 #ifndef _Convert_SphereToBSplineSurface_HeaderFile
0018 #define _Convert_SphereToBSplineSurface_HeaderFile
0019
0020 #include <Standard.hxx>
0021 #include <Standard_DefineAlloc.hxx>
0022 #include <Standard_Handle.hxx>
0023
0024 #include <Convert_ElementarySurfaceToBSplineSurface.hxx>
0025 #include <Standard_Boolean.hxx>
0026 class gp_Sphere;
0027
0028 //! This algorithm converts a bounded Sphere into a rational
0029 //! B-spline surface. The sphere is a Sphere from package gp.
0030 //! The parametrization of the sphere is
0031 //! P (U, V) = Loc  + Radius * Sin(V) * Zdir +
0032 //! Radius * Cos(V) * (Cos(U)*Xdir + Sin(U)*Ydir)
0033 //! where Loc is the center of the sphere Xdir, Ydir and Zdir are the
0034 //! normalized directions of the local cartesian coordinate system of
0035 //! the sphere. The parametrization range is U [0, 2PI] and
0036 //! V [-PI/2, PI/2].
0037 //! KeyWords :
0038 //! Convert, Sphere, BSplineSurface.
0039 class Convert_SphereToBSplineSurface : public Convert_ElementarySurfaceToBSplineSurface
0040 {
0041 public:
0042   DEFINE_STANDARD_ALLOC
0043
0044   //! The equivalent B-spline surface as the same orientation as the
0045   //! sphere in the U and V parametric directions.
0046   //!
0047   //! Raised if U1 = U2 or U1 = U2 + 2.0 * Pi
0048   //! Raised if V1 = V2.
0049   Standard_EXPORT Convert_SphereToBSplineSurface(const gp_Sphere&    Sph,
0050                                                  const Standard_Real U1,
0051                                                  const Standard_Real U2,
0052                                                  const Standard_Real V1,
0053                                                  const Standard_Real V2);
0054
0055   //! The equivalent B-spline surface as the same orientation
0056   //! as the sphere in the U and V parametric directions.
0057   //!
0058   //! Raised if UTrim = True and Param1 = Param2 or
0059   //! Param1 = Param2 + 2.0 * Pi
0060   //! Raised if UTrim = False and Param1 = Param2
0061   Standard_EXPORT Convert_SphereToBSplineSurface(const gp_Sphere&       Sph,
0062                                                  const Standard_Real    Param1,
0063                                                  const Standard_Real    Param2,
0064                                                  const Standard_Boolean UTrim = Standard_True);
0065
0066   //! The equivalent B-spline surface as the same orientation
0067   //! as the sphere in the U and V parametric directions.
0068   Standard_EXPORT Convert_SphereToBSplineSurface(const gp_Sphere& Sph);
0069
0070 protected:
0071 private:
0072 };
0073
0074 #endif // _Convert_SphereToBSplineSurface_HeaderFile