1 #ifndef INKSCAPE_LPE_TANGENT_TO_CURVE_H
2 #define INKSCAPE_LPE_TANGENT_TO_CURVE_H
4 /** \file
5 * LPE <tangent_to_curve> implementation, see lpe-tangent_to_curve.cpp.
6 */
8 /*
9 * Authors:
10 * Johan Engelen
11 * Maximilian Albert
12 *
13 * Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
14 * Copyright (C) Maximilian Albert 2008 <maximilian.albert@gmail.com>
15 *
16 * Released under GNU GPL, read the file 'COPYING' for more information
17 */
19 #include "live_effects/effect.h"
20 #include "live_effects/parameter/parameter.h"
21 #include "live_effects/parameter/point.h"
23 namespace Inkscape {
24 namespace LivePathEffect {
26 class LPETangentToCurve : public Effect {
27 public:
28 LPETangentToCurve(LivePathEffectObject *lpeobject);
29 virtual ~LPETangentToCurve();
31 virtual Geom::Piecewise<Geom::D2<Geom::SBasis> >
32 doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in);
34 /* the knotholder functions must be declared friends */
35 friend NR::Point attach_pt_get(SPItem *item);
36 friend void attach_pt_set(SPItem *item, NR::Point const &p, NR::Point const &origin, guint state);
38 private:
39 ScalarParam t_attach;
41 Geom::Point ptA;
42 Geom::Point derivA;
44 LPETangentToCurve(const LPETangentToCurve&);
45 LPETangentToCurve& operator=(const LPETangentToCurve&);
46 };
48 } //namespace LivePathEffect
49 } //namespace Inkscape
51 #endif