First commit of liquid simulation stuff

code/controllers/master_controller.dm

@@ -26,6 +26,7 @@ datum/controller/game_controller
 	var/powernets_cost	= 0
 	var/nano_cost		= 0
 	var/events_cost		= 0
+	var/puddles_cost
 	var/ticker_cost		= 0
 	var/gc_cost         = 0
 	var/total_cost		= 0
@@ -214,6 +215,11 @@ datum/controller/game_controller/proc/process()
 				processEvents()
 				events_cost = (world.timeofday - timer) / 10
 
+				//PUDDLES
+				timer = world.timeofday
+				processPuddles()
+				puddles_cost = (world.timeofday - timer) / 10
+
 				//TICKER
 				timer = world.timeofday
 				last_thing_processed = ticker.type
@@ -227,7 +233,7 @@ datum/controller/game_controller/proc/process()
 				gc_cost = (world.timeofday - timer) / 10
 
 				//TIMING
-				total_cost = air_cost + sun_cost + mobs_cost + diseases_cost + machines_cost + objects_cost + networks_cost + powernets_cost + nano_cost + events_cost + ticker_cost + gc_cost
+				total_cost = air_cost + sun_cost + mobs_cost + diseases_cost + machines_cost + objects_cost + networks_cost + powernets_cost + nano_cost + events_cost + puddles_cost + ticker_cost + gc_cost
 
 				var/end_time = world.timeofday
 				if(end_time < start_time)
@@ -318,6 +324,14 @@ datum/controller/game_controller/proc/process()
 
 	checkEvent()
 
+/datum/controller/game_controller/proc/processPuddles()
+	last_thing_processed = /datum/puddle
+
+	for (var/datum/puddle/Puddle in puddles)
+		if (Puddle)
+			Puddle.process()
+			continue
+
 datum/controller/game_controller/proc/Recover()		//Mostly a placeholder for now.
 	var/msg = "## DEBUG: [time2text(world.timeofday)] MC restarted. Reports:\n"
 	for(var/varname in master_controller.vars)

code/modules/liquid/splash_simulation.dm

@@ -74,7 +74,7 @@ obj/effect/liquid/proc/spread()
 	//world << "DEBUG: liquid spread!"
 	var/surrounding_volume = 0
 	var/list/spread_directions = list(1,2,4,8)
-	var/turf/loc_turf = loc
+	var/turf/loc_turf = get_turf(src)
 	for(var/direction in spread_directions)
 		var/turf/T = get_step(src,direction)
 		if(!T)
@@ -137,24 +137,31 @@ obj/effect/liquid/Destroy()
 
 obj/effect/liquid/proc/update_icon2()
 	//icon_state = num2text( max(1,min(7,(floor(volume),10)/10)) )
-
+	overlays = null
 	switch(volume)
-		if(0 to 0.1)
+		if(0 to 0.2)
 			del(src)
-		if(0.1 to 5)
+		if(0.2 to 5)
 			icon_state = "1"
+			overlays += image('icons/effects/liquid.dmi', src , "1-1", 5)
 		if(5 to 10)
 			icon_state = "2"
+			overlays += image('icons/effects/liquid.dmi', src , "2-1", 5)
 		if(10 to 20)
 			icon_state = "3"
+			overlays += image('icons/effects/liquid.dmi', src , "3-1", 5)
 		if(20 to 30)
 			icon_state = "4"
+			overlays += image('icons/effects/liquid.dmi', src , "4-1", 5)
 		if(30 to 40)
 			icon_state = "5"
+			overlays += image('icons/effects/liquid.dmi', src , "5-1", 5)
 		if(40 to 50)
 			icon_state = "6"
+			overlays += image('icons/effects/liquid.dmi', src , "6-1", 5)
 		if(50 to INFINITY)
 			icon_state = "7"
+			layer = 5
 
 turf/proc/can_accept_liquid(from_direction)
 	return 0