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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef INKSCAPE_LPE_PERP_BISECTOR_H
#define INKSCAPE_LPE_PERP_BISECTOR_H
/** \file
* LPE <perp_bisector> implementation, see lpe-perp_bisector.cpp.
*/
/*
* Authors:
* Maximilian Albert
* Johan Engelen
*
* Copyright (C) Johan Engelen 2007 <j.b.c.engelen@utwente.nl>
* Copyright (C) Maximilin Albert 2008 <maximilian.albert@gmail.com>
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include "live_effects/effect.h"
#include "live_effects/parameter/parameter.h"
#include "live_effects/parameter/point.h"
namespace Inkscape {
namespace LivePathEffect {
namespace PB {
// we need a separate namespace to avoid clashes with LPETangentToCurve
class KnotHolderEntityEnd;
class KnotHolderEntityLeftEnd;
class KnotHolderEntityRightEnd;
void bisector_end_set(SPItem *item, Geom::Point const &p, guint state, bool left = true);
}
class LPEPerpBisector : public Effect {
public:
LPEPerpBisector(LivePathEffectObject *lpeobject);
~LPEPerpBisector() override;
virtual EffectType effectType () { return PERP_BISECTOR; }
void doOnApply (SPLPEItem const* lpeitem) override;
Geom::Piecewise<Geom::D2<Geom::SBasis> >
doEffect_pwd2 (Geom::Piecewise<Geom::D2<Geom::SBasis> > const & pwd2_in) override;
/* the knotholder entity functions must be declared friends */
friend class PB::KnotHolderEntityEnd;
friend class PB::KnotHolderEntityLeftEnd;
friend class PB::KnotHolderEntityRightEnd;
friend void PB::bisector_end_set(SPItem *item, Geom::Point const &p, guint state, bool left);
void addKnotHolderEntities(KnotHolder *knotholder, SPDesktop *desktop, SPItem *item);
private:
ScalarParam length_left;
ScalarParam length_right;
Geom::Point A; // start of path
Geom::Point B; // end of path
Geom::Point M; // midpoint
Geom::Point C; // left end of bisector
Geom::Point D; // right end of bisector
Geom::Point perp_dir;
LPEPerpBisector(const LPEPerpBisector&) = delete;
LPEPerpBisector& operator=(const LPEPerpBisector&) = delete;
};
} //namespace LivePathEffect
} //namespace Inkscape
#endif
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