include/opencascade/BlendFunc_Corde.hxx

0001 // Created on: 1996-06-04
0002 // Created by: Stagiaire Xuan Trang PHAMPHU
0003 // Copyright (c) 1996-1999 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 _BlendFunc_Corde_HeaderFile
0018 #define _BlendFunc_Corde_HeaderFile
0019
0020 #include <Adaptor3d_Surface.hxx>
0021 #include <gp_Pnt.hxx>
0022 #include <gp_Pnt2d.hxx>
0023 #include <gp_Vec.hxx>
0024 #include <gp_Vec2d.hxx>
0025 #include <math_Vector.hxx>
0026
0027 class math_Matrix;
0028
0029 //! This function calculates point (pts) on the curve of
0030 //! intersection between the normal to a curve (guide)
0031 //! in a chosen parameter and a surface (surf), so
0032 //! that pts was at a given distance from the guide.
0033 //! X(1),X(2) are the parameters U,V of pts on surf.
0034 class BlendFunc_Corde
0035 {
0036 public:
0037   DEFINE_STANDARD_ALLOC
0038
0039   Standard_EXPORT BlendFunc_Corde(const occ::handle<Adaptor3d_Surface>& S,
0040                                   const occ::handle<Adaptor3d_Curve>&   CGuide);
0041
0042   Standard_EXPORT void SetParam(const double Param);
0043
0044   Standard_EXPORT void SetDist(const double Dist);
0045
0046   //! computes the values <F> of the Function for the
0047   //! variable <X>.
0048   //! Returns True if the computation was done successfully,
0049   //! False otherwise.
0050   Standard_EXPORT bool Value(const math_Vector& X, math_Vector& F);
0051
0052   //! returns the values <D> of the derivatives for the
0053   //! variable <X>.
0054   //! Returns True if the computation was done successfully,
0055   //! False otherwise.
0056   Standard_EXPORT bool Derivatives(const math_Vector& X, math_Matrix& D);
0057
0058   Standard_EXPORT const gp_Pnt& PointOnS() const;
0059
0060   //! returns the point of parameter <Param> on CGuide
0061   Standard_EXPORT const gp_Pnt& PointOnGuide() const;
0062
0063   //! returns the normal to CGuide at Ptgui.
0064   Standard_EXPORT const gp_Vec& NPlan() const;
0065
0066   //! Returns True when it is not possible to compute
0067   //! the tangent vectors at PointOnS.
0068   Standard_EXPORT bool IsTangencyPoint() const;
0069
0070   //! Returns the tangent vector at PointOnS, in 3d space.
0071   Standard_EXPORT const gp_Vec& TangentOnS() const;
0072
0073   //! Returns the tangent vector at PointOnS, in the
0074   //! parametric space of the first surface.
0075   Standard_EXPORT const gp_Vec2d& Tangent2dOnS() const;
0076
0077   //! Derived of the function compared to the parameter
0078   //! of the guideline
0079   Standard_EXPORT void DerFguide(const math_Vector& Sol, gp_Vec2d& DerF);
0080
0081   //! Returns False if Sol is not solution else returns
0082   //! True and updates the fields tgs and tg2d
0083   Standard_EXPORT bool IsSolution(const math_Vector& Sol, const double Tol);
0084
0085 private:
0086   occ::handle<Adaptor3d_Surface> surf;
0087   occ::handle<Adaptor3d_Curve>   guide;
0088   gp_Pnt                         pts;
0089   gp_Pnt2d                       pt2d;
0090   double                         dis;
0091   double                         normtg;
0092   double                         theD;
0093   gp_Pnt                         ptgui;
0094   gp_Vec                         nplan;
0095   gp_Vec                         d1gui;
0096   gp_Vec                         d2gui;
0097   gp_Vec                         tgs;
0098   gp_Vec2d                       tg2d;
0099   bool                           istangent;
0100 };
0101
0102 #endif // _BlendFunc_Corde_HeaderFile