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wlsunset/color_math.h

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Move math out of main
2020-09-13 01:22:18 +00:00
#ifndef _COLOR_MATH_H
#define _COLOR_MATH_H
Gracefully handle midnight sun/polar night The sun trajectory calculation previously emitted garbage if midnight sun or polar night phenomena was in effect. To fix this, the calculation is overhauled to report if the computation failed, and if so, which specific phenomena was the cause. Timing recalulation uses this information to change out of the normal state that uses the four sun position timings, into a static state where wlsunset simply waits a day at a time for a normal sun trajectory pattern to be restored. In this state, a fixedc high/low temperature is set as appropriate for the phenomena. A transition phase replicating the previous day's sunrise is used to smooth out entry into a midnight sun, which would otherwise cause a jarring instant-daylight setting.
2020-10-17 11:23:48 +00:00
#include "math.h"
Split state from config, cleanup
2020-10-14 15:57:34 +00:00
#include "time.h"
Gracefully handle midnight sun/polar night The sun trajectory calculation previously emitted garbage if midnight sun or polar night phenomena was in effect. To fix this, the calculation is overhauled to report if the computation failed, and if so, which specific phenomena was the cause. Timing recalulation uses this information to change out of the normal state that uses the four sun position timings, into a static state where wlsunset simply waits a day at a time for a normal sun trajectory pattern to be restored. In this state, a fixedc high/low temperature is set as appropriate for the phenomena. A transition phase replicating the previous day's sunrise is used to smooth out entry into a midnight sun, which would otherwise cause a jarring instant-daylight setting.
2020-10-17 11:23:48 +00:00
// These are macros so they can be applied to constants
#define DEGREES(rad) ((rad) * 180.0 / M_PI)
#define RADIANS(deg) ((deg) * M_PI / 180.0)
enum sun_condition {
NORMAL,
MIDNIGHT_SUN,
POLAR_NIGHT,
SUN_CONDITION_LAST
};
Split state from config, cleanup
2020-10-14 15:57:34 +00:00
struct sun {
time_t dawn;
time_t sunrise;
time_t sunset;
time_t dusk;
};
Gracefully handle midnight sun/polar night The sun trajectory calculation previously emitted garbage if midnight sun or polar night phenomena was in effect. To fix this, the calculation is overhauled to report if the computation failed, and if so, which specific phenomena was the cause. Timing recalulation uses this information to change out of the normal state that uses the four sun position timings, into a static state where wlsunset simply waits a day at a time for a normal sun trajectory pattern to be restored. In this state, a fixedc high/low temperature is set as appropriate for the phenomena. A transition phase replicating the previous day's sunrise is used to smooth out entry into a midnight sun, which would otherwise cause a jarring instant-daylight setting.
2020-10-17 11:23:48 +00:00
enum sun_condition calc_sun(struct tm *tm, double longitude, double latitude, struct sun *sun);
Move math out of main
2020-09-13 01:22:18 +00:00
void calc_whitepoint(int temp, double *rw, double *gw, double *bw);
Gracefully handle midnight sun/polar night The sun trajectory calculation previously emitted garbage if midnight sun or polar night phenomena was in effect. To fix this, the calculation is overhauled to report if the computation failed, and if so, which specific phenomena was the cause. Timing recalulation uses this information to change out of the normal state that uses the four sun position timings, into a static state where wlsunset simply waits a day at a time for a normal sun trajectory pattern to be restored. In this state, a fixedc high/low temperature is set as appropriate for the phenomena. A transition phase replicating the previous day's sunrise is used to smooth out entry into a midnight sun, which would otherwise cause a jarring instant-daylight setting.
2020-10-17 11:23:48 +00:00
double clamp(double value);
Move math out of main
2020-09-13 01:22:18 +00:00
#endif