0.1

dayz_code/compile/fn_sunRise.sqf

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+/*
+	Author: CarlGustaffa (modified by gammadust)
+
+	Description:
+	Returns the sun's rise in hours for the current day of the year on any island (whos latitude may differ).
+
+	Parameters:
+	None needed.
+
+	Returns:
+	Sun's rise in hours, in the same format as engine's [daytime] command (16.5 == 16:30)
+	To obtain sun's set, just subtract the result from 24.
+	
+	Reference:
+	http://forums.bistudio.com/showthread.php?107476-How-do-I-detect-sundown-sunrise
+*/
+private ["_lat", "_day", "_hour"];
+_lat = -1 * getNumber(configFile >> "CfgWorlds" >> worldName >> "latitude");
+_day = 360 * (dateToNumber date);
+_hour = acos ((24 * sin(_lat) * cos(_day)) / ((12 * cos(_day) - 78) * cos(_lat)));
+_daytime = _hour / 360 * 24;
+_daytime