💿🐜 Antkeeper source code
https://antkeeper.com
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
56 lines
1.6 KiB
56 lines
1.6 KiB
/*
|
|
* Copyright (C) 2021 Christopher J. Howard
|
|
*
|
|
* This file is part of Antkeeper source code.
|
|
*
|
|
* Antkeeper source code 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 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Antkeeper source code 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 Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef ANTKEEPER_COLOR_UCS_HPP
|
|
#define ANTKEEPER_COLOR_UCS_HPP
|
|
|
|
#include "math/math.hpp"
|
|
|
|
namespace color {
|
|
|
|
/// Functions which operate in the CIE 1960 UCS colorspace.
|
|
namespace ucs {
|
|
|
|
/**
|
|
* Transforms CIE 1960 UCS chromaticity coordinates into the CIE xyY colorspace.
|
|
*
|
|
* @param uv CIE 1960 UCS chromaticity coordinates.
|
|
* @param luminance Luminance or `Y` value of the resulting xyY color.
|
|
* @return CIE xyY color.
|
|
*/
|
|
template <class T>
|
|
math::vector3<T> to_xyy(const math::vector2<T>& uv, T luminance = T(1.0));
|
|
|
|
template <class T>
|
|
math::vector3<T> to_xyy(const math::vector2<T>& uv, T luminance)
|
|
{
|
|
const T inverse_denom = T(1.0) / (T(2.0) * uv[0] - T(8.0) * uv[1] + T(4.0));
|
|
|
|
return math::vector3<T>
|
|
{
|
|
(T(3.0) * uv[0]) * inverse_denom,
|
|
(T(2.0) * uv[1]) * inverse_denom,
|
|
luminance
|
|
};
|
|
}
|
|
|
|
} // namespace ucs
|
|
} // namespace color
|
|
|
|
#endif // ANTKEEPER_COLOR_UCS_HPP
|