Body temperature fixes and updates

Body temperature regulation is now based on species, and environmental
temperature now respects the air density when affecting living/humans.
This also fixes some bugs with heat/cold protection handling and
improves the way synthetic species body temperatures are handled to be
much more logical.

IPCs always gain temperature but cool down because of their environment.
When the heat transfer to the environment is reduced because of the lack
of air, this will cause IPCs to heat up.

As well, having an infection will increase your body temperature, and
body scanners now detect infections.

code/modules/organs/organ.dm

@@ -5,6 +5,9 @@
 	var/list/datum/autopsy_data/autopsy_data = list()
 	var/list/trace_chemicals = list() // traces of chemicals in the organ,
 									  // links chemical IDs to number of ticks for which they'll stay in the blood
+									  
+	var/germ_level = 0		// INTERNAL germs inside the organ, this is BAD if it's greater than INFECTION_LEVEL_ONE
+	
 	proc/process()
 		return 0
 
@@ -82,7 +85,7 @@
 				//Moving makes open wounds get infected much faster
 				if (E.wounds.len)
 					for(var/datum/wound/W in E.wounds)
-						if (W.can_infect())
+						if (W.infection_check())
 							W.germ_level += 1
 
 			//Special effects for limbs.

code/modules/organs/organ_external.dm

@@ -40,8 +40,6 @@
 
 	var/obj/item/hidden = null
 	var/list/implants = list()
-	// INTERNAL germs inside the organ, this is BAD if it's greater 0
-	var/germ_level = 0
 
 	// how often wounds should be updated, a higher number means less often
 	var/wound_update_accuracy = 1
@@ -345,7 +343,7 @@ This function completely restores a damaged organ to perfect condition.
 		//Syncing germ levels with external wounds
 		for(var/datum/wound/W in wounds)
 			//Open wounds can become infected
-			if (owner.germ_level > W.germ_level && W.can_infect())
+			if (owner.germ_level > W.germ_level && W.infection_check())
 				W.germ_level++
 			
 			//Infected wounds raise the organ's germ level
@@ -356,12 +354,17 @@ This function completely restores a damaged organ to perfect condition.
 		var/antibiotics = owner.reagents.get_reagent_amount("spaceacillin")
 		if (antibiotics > 5)
 			if (prob(4*antibiotics)) germ_level--
+		
+		if(germ_level > INFECTION_LEVEL_ONE)
+			//having an infection raises your body temperature
+			var/temperature_increase = (owner.species.heat_level_1 - owner.species.body_temperature - 1)* min(germ_level/INFECTION_LEVEL_TWO, 1)
+			owner.bodytemperature += temperature_increase
 			
-		if(germ_level > GANGREN_LEVEL_ONE && prob(round(germ_level/10)))	//aiming for a light infection to become serious after 40 minutes, standing still
-			germ_level += 1
-			owner.adjustToxLoss(1)
+			if(prob(round(germ_level/10)))	//aiming for a light infection to become serious after 40 minutes, standing still
+				germ_level += 1
+				owner.adjustToxLoss(1)
 			
-		if(germ_level > GANGREN_LEVEL_TWO && antibiotics < 30)	//overdosing is necessary to stop severe infections
+		if(germ_level > INFECTION_LEVEL_TWO && antibiotics < 30)	//overdosing is necessary to stop severe infections
 			germ_level++
 			owner.adjustToxLoss(1)
 
@@ -691,9 +694,9 @@ This function completely restores a damaged organ to perfect condition.
 /datum/organ/external/proc/get_damage()	//returns total damage
 	return max(brute_dam + burn_dam - perma_injury, perma_injury)	//could use health?
 
-/datum/organ/external/proc/is_infected()
+/datum/organ/external/proc/has_infected_wound()
 	for(var/datum/wound/W in wounds)
-		if(W.germ_level > 100)
+		if(W.germ_level > 150)
 			return 1
 	return 0
 

code/modules/organs/wound.dm

@@ -119,7 +119,7 @@
 
 	// checks if wound is considered open for external infections
 	// untreated cuts (and bleeding bruises) and burns are possibly infectable, chance higher if wound is bigger
-	proc/can_infect()
+	proc/infection_check()
 		if (is_treated() && damage < 10)
 			return 0
 		if (disinfected)