/**
* Copyright © 2016 Mattias Andrée <maandree@member.fsf.org>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
/**
* The times of the day, by degree of darkness.
*/
enum darkness {
/**
* Not calculated yet.
*/
UNKNOWN = -1,
/**
* Hopefully, it is bright outside.
*/
DAYTIME = 0,
/**
* The sky is golden. The golden "hour".
* Also known as BMCT (dawn) or EECT (dusk).
*/
CIVIL_TWILIGHT = 1,
/**
* The sky is pink and blue.
*/
NAUTICAL_TWILIGHT = 2,
/**
* The sky is medium dark blue.
*/
ASTRONOMICAL_TWILIGHT = 3,
/**
* The sky is reallu dark blue.
*/
NIGHT = 4
};
/**
* Is it daytime, night, perhaps some kind of twilight?
*
* @param elevation The Sun's apparent elevation.
* @return The time of the day.
*/
enum darkness get_darkness(double elevation);
