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60 lines
1.7 KiB
C++
60 lines
1.7 KiB
C++
/*
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* Polygon.h
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*
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* (c) 2016 Sofian Audry -- info(@)sofianaudry(.)com
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef POLYGON_H_
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#define POLYGON_H_
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#include "Shape.h"
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MM_BEGIN_NAMESPACE
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/**
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* This class represents a simple polygon (ie. the control points are vertices).
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*/
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class Polygon : public MShape
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{
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Q_OBJECT
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public:
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Polygon() {}
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Polygon(QVector<QPointF> vertices_) : MShape(vertices_) {}
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virtual ~Polygon() {}
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virtual QPolygonF toPolygon() const;
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virtual bool includesPoint(const QPointF& p) {
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return toPolygon().containsPoint(p, Qt::OddEvenFill);
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}
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// Override the parent, checking to make sure the vertices are displaced correctly.
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virtual void setVertex(int i, const QPointF& v);
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protected:
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/// Returns all line segments of the polygon.
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QVector<QLineF> _getSegments() const;
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/// Returns all line segments of a polygon.
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static QVector<QLineF> _getSegments(const QPolygonF& polygon);
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/// Makes sure vertex v as the i-th point of polygon stays inside the polygon.
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static void _constrainVertex(const QPolygonF& polygon, int i, QPointF& v);
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};
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MM_END_NAMESPACE
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#endif /* POLYGON_H_ */
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