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28		28
29	#define TWILIGHT_NAUT -12.0	29	#define TWILIGHT_NAUT -12.0
30	#define TWILIGHT_CIVIL -6.0	30	#define TWILIGHT_CIVIL -6.0
31	#define SUN_RISE_SET -0.833	31	#define SUN_RISE_SET -0.833
32	#define SUN_HIGH 2.0	32	#define SUN_HIGH 2.0
33		33
34	QPair<QTime, QTime> calculateSunTimings(QDate prompt, double latitude, double longitude, bool morning)	34	QPair<QTime, QTime> calculateSunTimings(QDate prompt, double latitude, double longitude, bool morning)
35	{	35	{
36	// calculations based on http://aa.quae.nl/en/reken/zonpositie.html	36	// calculations based on https://aa.quae.nl/en/reken/zonpositie.html
37	// accuracy: +/- 5min	37	// accuracy: +/- 5min
38		38
39	// positioning	39	// positioning
40	const double rad = M_PI / 180.;	40	const double rad = M_PI / 180.;
41	const double earthObliquity = 23.4397; // epsilon	41	const double earthObliquity = 23.4397; // epsilon
42		42
43	const double lat = latitude; // phi	43	const double lat = latitude; // phi
44	const double lng = -longitude; // lw	44	const double lng = -longitude; // lw
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