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// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SEEN_SNAPPEDLINE_H
#define SEEN_SNAPPEDLINE_H
/**
* \file src/snapped-line.h
* \brief SnappedLine class.
*
* Authors:
* Diederik van Lierop <mail@diedenrezi.nl>
*
* Released under GNU GPL v2+, read the file 'COPYING' for more information.
*/
#include <vector>
#include <list>
#include "snapped-point.h"
namespace Inkscape
{
/// Class describing the result of an attempt to snap to a line segment.
class SnappedLineSegment : public SnappedPoint
{
public:
SnappedLineSegment();
SnappedLineSegment(Geom::Point const &snapped_point, Geom::Coord const &snapped_distance, SnapSourceType const &source, long source_num, SnapTargetType const &target, Geom::Coord const &snapped_tolerance,bool const &always_snap, Geom::Point const &start_point_of_line, Geom::Point const &end_point_of_line);
~SnappedLineSegment();
Inkscape::SnappedPoint intersect(SnappedLineSegment const &line) const; //intersect with another SnappedLineSegment
Geom::LineSegment getLineSegment() const {return Geom::LineSegment(_start_point_of_line, _end_point_of_line);}
private:
Geom::Point _start_point_of_line;
Geom::Point _end_point_of_line;
};
/// Class describing the result of an attempt to snap to a line.
class SnappedLine : public SnappedPoint
{
public:
SnappedLine();
SnappedLine(Geom::Point const &snapped_point, Geom::Coord const &snapped_distance, SnapSourceType const &source, long source_num, SnapTargetType const &target, Geom::Coord const &snapped_tolerance, bool const &always_snap, Geom::Point const &normal_to_line, Geom::Point const &point_on_line);
~SnappedLine();
Inkscape::SnappedPoint intersect(SnappedLine const &line) const; //intersect with another SnappedLine
// This line is described by this equation:
// a*x + b*y = c <-> nx*px + ny+py = c <-> n.p = c
Geom::Point getNormal() const {return _normal_to_line;} // n = (nx, ny)
Geom::Point getPointOnLine() const {return _point_on_line;} // p = (px, py)
Geom::Coord getConstTerm() const {return dot(_normal_to_line, _point_on_line);} // c = n.p = nx*px + ny*py;
Geom::Line getLine() const {return Geom::Line(_point_on_line, _point_on_line + Geom::rot90(_normal_to_line));}
private:
Geom::Point _normal_to_line;
Geom::Point _point_on_line;
};
}
bool getClosestSLS(std::list<Inkscape::SnappedLineSegment> const &list, Inkscape::SnappedLineSegment &result);
bool getClosestIntersectionSLS(std::list<Inkscape::SnappedLineSegment> const &list, Inkscape::SnappedPoint &result);
bool getClosestSL(std::list<Inkscape::SnappedLine> const &list, Inkscape::SnappedLine &result);
bool getClosestIntersectionSL(std::list<Inkscape::SnappedLine> const &list, Inkscape::SnappedPoint &result);
bool getClosestIntersectionSL(std::list<Inkscape::SnappedLine> const &list1, std::list<Inkscape::SnappedLine> const &list2, Inkscape::SnappedPoint &result);
#endif /* !SEEN_SNAPPEDLINE_H */
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
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