71 lines
2.0 KiB
C++
71 lines
2.0 KiB
C++
/****************************************************************************
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**
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** This file is part of the LibreCAD project, a 2D CAD program
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**
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** Copyright (C) 2010 R. van Twisk (librecad@rvt.dds.nl)
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** Copyright (C) 2001-2003 RibbonSoft. All rights reserved.
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**
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**
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** This file may be distributed and/or modified under the terms of the
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** GNU General Public License version 2 as published by the Free Software
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** Foundation and appearing in the file gpl-2.0.txt included in the
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** packaging of this file.
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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, write to the Free Software
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** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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**
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** This copyright notice MUST APPEAR in all copies of the script!
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**
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**********************************************************************/
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#ifndef RS_INFOAREA_H
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#define RS_INFOAREA_H
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#include <vector>
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#include "rs_vector.h"
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class QPolygon;
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/**
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* Class for getting information about an area.
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*
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* @author Andrew Mustun
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*/
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class RS_InfoArea {
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public:
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RS_InfoArea();
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void reset();
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void push_back(const RS_Vector& p);
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//whether the point p is already in contour
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bool duplicated(const RS_Vector& p);
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void pop_back();
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double getArea() const;
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double getCircumference();
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int size();
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const RS_Vector& at(int i) const;
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/**
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* @brief getArea of polygon
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* @param polygon
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* @return area
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*/
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static double getArea(const QPolygon& polygon);
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private:
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void calculate();
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double calcSubArea(const RS_Vector& p1, const RS_Vector& p2);
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std::vector<RS_Vector> thePoints;
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double baseY;
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double area;
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double circumference;
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bool calculationNeeded;
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};
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#endif
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