Merge pull request #11357 from Markolie/lighting

Lighting system update

code/controllers/subsystem/lighting.dm

@@ -0,0 +1,87 @@
+GLOBAL_LIST_EMPTY(lighting_update_lights) // List of lighting sources  queued for update.
+GLOBAL_LIST_EMPTY(lighting_update_corners) // List of lighting corners  queued for update.
+GLOBAL_LIST_EMPTY(lighting_update_objects) // List of lighting objects queued for update.
+
+SUBSYSTEM_DEF(lighting)
+	name = "Lighting"
+	wait = 2
+	init_order = INIT_ORDER_LIGHTING
+	flags = SS_TICKER
+
+/datum/controller/subsystem/lighting/stat_entry()
+	..("L:[GLOB.lighting_update_lights.len]|C:[GLOB.lighting_update_corners.len]|O:[GLOB.lighting_update_objects.len]")
+
+/datum/controller/subsystem/lighting/Initialize(timeofday)
+	if(!initialized)
+		if(config.starlight)
+			for(var/I in GLOB.all_areas)
+				var/area/A = I
+				if(A.dynamic_lighting == DYNAMIC_LIGHTING_IFSTARLIGHT)
+					A.luminosity = 0
+
+		create_all_lighting_objects()
+		initialized = TRUE
+
+	fire(FALSE, TRUE)
+
+	return ..()
+
+/datum/controller/subsystem/lighting/fire(resumed, init_tick_checks)
+	MC_SPLIT_TICK_INIT(3)
+	if(!init_tick_checks)
+		MC_SPLIT_TICK
+	var/i = 0
+	for(i in 1 to GLOB.lighting_update_lights.len)
+		var/datum/light_source/L = GLOB.lighting_update_lights[i]
+
+		L.update_corners()
+
+		L.needs_update = LIGHTING_NO_UPDATE
+
+		if(init_tick_checks)
+			CHECK_TICK
+		else if(MC_TICK_CHECK)
+			break
+	if(i)
+		GLOB.lighting_update_lights.Cut(1, i+1)
+		i = 0
+
+	if(!init_tick_checks)
+		MC_SPLIT_TICK
+
+	for (i in 1 to GLOB.lighting_update_corners.len)
+		var/datum/lighting_corner/C = GLOB.lighting_update_corners[i]
+
+		C.update_objects()
+		C.needs_update = FALSE
+		if(init_tick_checks)
+			CHECK_TICK
+		else if(MC_TICK_CHECK)
+			break
+	if(i)
+		GLOB.lighting_update_corners.Cut(1, i+1)
+		i = 0
+
+
+	if(!init_tick_checks)
+		MC_SPLIT_TICK
+
+	for (i in 1 to GLOB.lighting_update_objects.len)
+		var/atom/movable/lighting_object/O = GLOB.lighting_update_objects[i]
+
+		if(QDELETED(O))
+			continue
+
+		O.update()
+		O.needs_update = FALSE
+		if(init_tick_checks)
+			CHECK_TICK
+		else if(MC_TICK_CHECK)
+			break
+	if(i)
+		GLOB.lighting_update_objects.Cut(1, i+1)
+
+
+/datum/controller/subsystem/lighting/Recover()
+	initialized = SSlighting.initialized
+	..()