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/*
Copyright (C) 2015 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/** @file src/chromaticity.h
* @brief Chromaticity class.
*/
#ifndef DCP_CHROMATICITY_H
#define DCP_CHROMATICITY_H
#include <cmath>
namespace dcp {
/** @class Chromaticity
* @brief A representation of a x,y,z chromaticity, where z = 1 - x - y
*/
class Chromaticity
{
public:
Chromaticity ()
: x (0)
, y (0)
{}
Chromaticity (double x_, double y_)
: x (x_)
, y (y_)
{}
double x;
double y;
double z () const {
return 1 - x - y;
}
/** @return true if this Chromaticity's x and y are within epsilon of other */
bool about_equal (Chromaticity const & other, float epsilon) const {
return std::fabs (x - other.x) < epsilon && std::fabs (y - other.y) < epsilon;
}
};
}
#endif
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