text: // Created on: 2002-08-02
  // Created by: Alexander KARTOMIN  (akm)
  // Copyright (c) 2002-2014 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 _LProp3d_SurfaceTool_HeaderFile
  #define _LProp3d_SurfaceTool_HeaderFile
  
  #include <Adaptor3d_Surface.hxx>
  
  class LProp3d_SurfaceTool 
  {
  public:
  
    DEFINE_STANDARD_ALLOC
  
    
    //! Computes the point <P> of parameter <U> and <V> on the
    //! HSurface <S>.
    Standard_EXPORT static void Value (const Handle(Adaptor3d_Surface)& S, const Standard_Real U, const Standard_Real V, gp_Pnt& P);
    
    //! Computes the point <P> and first derivative <D1*> of
    //! parameter <U> and <V> on the HSurface <S>.
    Standard_EXPORT static void D1 (const Handle(Adaptor3d_Surface)& S, const Standard_Real U, const Standard_Real V, gp_Pnt& P, gp_Vec& D1U, gp_Vec& D1V);
    
    //! Computes the point <P>, the first derivative <D1*> and second
    //! derivative <D2*> of parameter <U> and <V> on the HSurface <S>.
    Standard_EXPORT static void D2 (const Handle(Adaptor3d_Surface)& S, const Standard_Real U, const Standard_Real V, gp_Pnt& P, gp_Vec& D1U, gp_Vec& D1V, gp_Vec& D2U, gp_Vec& D2V, gp_Vec& DUV);
    
    Standard_EXPORT static gp_Vec DN (const Handle(Adaptor3d_Surface)& S, const Standard_Real U, const Standard_Real V, const Standard_Integer IU, const Standard_Integer IV);
    
    //! returns the order of continuity of the HSurface <S>.
    //! returns 1 : first derivative only is computable
    //! returns 2 : first and second derivative only are computable.
    Standard_EXPORT static Standard_Integer Continuity (const Handle(Adaptor3d_Surface)& S);
    
    //! returns the bounds of the HSurface.
    Standard_EXPORT static void Bounds (const Handle(Adaptor3d_Surface)& S, Standard_Real& U1, Standard_Real& V1, Standard_Real& U2, Standard_Real& V2);
  
  
  
  
  protected:
  
  
  
  
  
  private:
  
  
  
  
  
  };
  
  
  
  
  
  
  
  #endif // _LProp3d_SurfaceTool_HeaderFile
  