89 lines
2.2 KiB
C++
89 lines
2.2 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2014 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_PIXEL_POSITION_HPP
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#define MAPNIK_PIXEL_POSITION_HPP
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// stl
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#include <cmath>
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namespace mapnik
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{
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struct rotation;
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struct pixel_position
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{
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double x;
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double y;
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pixel_position(double x_, double y_)
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: x(x_),
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y(y_) {}
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pixel_position()
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: x(0),
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y(0) {}
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pixel_position operator+ (pixel_position const& other) const
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{
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return pixel_position(x + other.x, y + other.y);
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}
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pixel_position operator- (pixel_position const& other) const
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{
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return pixel_position(x - other.x, y - other.y);
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}
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pixel_position operator* (double other) const
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{
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return pixel_position(x * other, y * other);
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}
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void set(double x_, double y_)
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{
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x = x_;
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y = y_;
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}
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void clear()
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{
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x = 0;
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y = 0;
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}
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pixel_position rotate(rotation const& rot) const;
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pixel_position operator~() const
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{
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return pixel_position(x, -y);
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}
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double length()
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{
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return std::sqrt(x * x + y * y);
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}
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};
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inline pixel_position operator* (double factor, pixel_position const& pos)
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{
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return pixel_position(factor * pos.x, factor * pos.y);
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}
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}
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#endif // MAPNIK_PIXEL_POSITION_HPP
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