Permanent Fat changes

Permanent fat variable removed. Instead, the permanent WG pref, if enabled, now will save your character's real fatness at roundend or cryo as your new starting weight. Starting weight can still be tweaked from 0 to 8000 should you want to lose some of it.
Tweaked galbanic compound to behave better while addicted.
Macerinic solution can now be overdosed (50u). Overdosing causes your character to get hungry but also increases your weight loss rate up to 5

GainStation13/code/mechanics/fatness.dm

@@ -11,8 +11,6 @@ GLOBAL_LIST_INIT(uncapped_resize_areas, list(/area/bridge, /area/crew_quarters,
 	var/fat_hiders = list()
 	//The actual value a mob is at. Is equal to fatness if fat_hider is FALSE.
 	var/fatness_real = 0
-	//Permanent fatness, which sticks around between rounds
-	var/fatness_perma = 0
 	///At what rate does the parent mob gain weight? 1 = 100%
 	var/weight_gain_rate = 1
 	//At what rate does the parent mob lose weight? 1 = 100%
@@ -51,12 +49,10 @@ GLOBAL_LIST_INIT(uncapped_resize_areas, list(/area/bridge, /area/crew_quarters,
 	fatness = fatness_real //Make their current fatness their real fatness
 
 	hiders_apply()	//Check and apply hiders
-	perma_apply()	//Check and apply for permanent fat
 	xwg_resize()	//Apply XWG
 
 	return TRUE
 
-
 /mob/living/carbon/fully_heal(admin_revive)
 	fatness = 0
 	fatness_real = 0
@@ -142,42 +138,10 @@ GLOBAL_LIST_INIT(uncapped_resize_areas, list(/area/bridge, /area/crew_quarters,
 		if(client?.prefs?.max_weight) //Check their prefs
 			fatness = min(fatness, (client?.prefs?.max_weight - 1)) //And make sure it's not above their preferred max
 
-/mob/living/carbon/proc/perma_apply()
-	if(fatness_perma > 0)	//Check if we need to make calcs at all
-		fatness = fatness + fatness_perma	//Add permanent fat to fatness
-		if(client?.prefs?.max_weight)	//Check for max weight prefs
-			fatness = min(fatness, (client?.prefs?.max_weight - 1))	//Apply max weight prefs
-
-/mob/living/carbon/proc/adjust_perma(adjustment_amount, type_of_fattening = FATTENING_TYPE_ITEM)
-	if(!client)
-		return FALSE
-	if(!client.prefs.weight_gain_permanent)
-		return FALSE
-	
-	if(!adjustment_amount || !type_of_fattening)
-		return FALSE
-
-	if(!HAS_TRAIT(src, TRAIT_UNIVERSAL_GAINER) && client?.prefs)
-		if(!check_weight_prefs(type_of_fattening))
-			return FALSE
-	var/amount_to_change = adjustment_amount
-
-	if(adjustment_amount > 0)
-		amount_to_change = amount_to_change * weight_gain_rate	
-	else
-		amount_to_change = amount_to_change * weight_loss_rate
-
-	fatness_perma += amount_to_change
-	fatness_perma = max(fatness_perma, MINIMUM_FATNESS_LEVEL)
-		
-	if(client?.prefs?.max_weight) // GS13
-		fatness_perma = min(fatness_perma, (client?.prefs?.max_weight - 1))
-
 /mob/living/carbon/human/handle_breathing(times_fired)
 	. = ..()
 	fatness = fatness_real
 	hiders_apply()
-	perma_apply()
 	xwg_resize()
 
 /mob/living/carbon/proc/xwg_resize()

GainStation13/code/mechanics/permanent_fat.dm

@@ -1,6 +1,8 @@
 /datum/preferences/proc/perma_fat_save(character)
 	if(iscarbon(character))
 		var/mob/living/carbon/C = character
+		if(!C.client.prefs.weight_gain_permanent)
+			return FALSE
 		if(!path)
 			return 0
 			if(world.time < savecharcooldown)
@@ -15,4 +17,4 @@
 			return 0
 		S.cd = "/character[default_slot]"
 		
-		WRITE_FILE(S["permanent_fat"]			, C.fatness_perma)
+		WRITE_FILE(S["starting_weight"]			, C.fatness_real)

GainStation13/code/modules/reagents/chemistry/reagents/fermi_fat.dm

@@ -1,5 +1,3 @@
-///datum/reagent/sizechem
-
 //Reagent
 /datum/reagent/fermi_fat
 	name = "Galbanic Compound"
@@ -55,7 +53,6 @@
 	if(!iscarbon(M))
 		return..()
 	M.adjust_fatness(30, FATTENING_TYPE_CHEM)
-	M.adjust_perma(1, FATTENING_TYPE_CHEM)
 	..()
 	. = 1
 
@@ -65,7 +62,6 @@
 		return..()
 	var/mob/living/carbon/C = M
 	C.adjust_fatness(20, FATTENING_TYPE_CHEM)
-	C.adjust_perma(1, FATTENING_TYPE_CHEM)
 	..()
 
 /datum/reagent/fermi_fat/overdose_start(mob/living/M)
@@ -83,7 +79,7 @@
 		C.adjust_fatness(1, FATTENING_TYPE_CHEM)
 		C.fullness = max(0, C.fullness-1)
 		C.nutrition = max(0, C.nutrition-1)
-		if(addiction_mults == 0)
+		if(addiction_mults < 1)
 			C.nutri_mult += 0.5
 			C.weight_gain_rate += 0.25
 			addiction_mults = 1
@@ -99,7 +95,7 @@
 		C.adjust_fatness(2, FATTENING_TYPE_CHEM)
 		C.fullness = max(0, C.fullness-2)
 		C.nutrition = max(0, C.nutrition-2)
-		if(addiction_mults <= 1)
+		if(addiction_mults < 2)
 			C.nutri_mult += 0.5
 			C.weight_gain_rate += 0.25
 			addiction_mults = 2
@@ -115,7 +111,7 @@
 		C.adjust_fatness(3, FATTENING_TYPE_CHEM)
 		C.fullness = max(0, C.fullness-3)
 		C.nutrition = max(0, C.nutrition-3)
-		if(addiction_mults <= 2)
+		if(addiction_mults < 3)
 			C.nutri_mult += 0.5
 			C.weight_gain_rate += 0.25
 			addiction_mults = 3
@@ -131,7 +127,7 @@
 		C.adjust_fatness(4, FATTENING_TYPE_CHEM)
 		C.fullness = max(0, C.fullness-4)
 		C.nutrition = max(0, C.nutrition-4)
-		if(addiction_mults <= 3)
+		if(addiction_mults < 4)
 			C.nutri_mult += 0.5
 			C.weight_gain_rate += 0.25
 			addiction_mults = 4
@@ -143,6 +139,7 @@
 		C.weight_gain_rate = max(0,11, 0.25 * addiction_mults)
 	return
 
+//Reagent
 /datum/reagent/fermi_slim
 	name = "Macerinic Solution"
 	description = "A solution with unparalleled obesity-solving properties. One of the few things known to be capable of removing galbanic fat."
@@ -152,6 +149,8 @@
 	metabolization_rate = REAGENTS_METABOLISM / 4
 	can_synth = FALSE
 
+	overdose_threshold = 50
+
 //Reaction
 /datum/chemical_reaction/fermi_slim
 	name = "FermiSlim"
@@ -181,6 +180,14 @@
 	if(!iscarbon(M))
 		return..()
 	M.adjust_fatness(-50, FATTENING_TYPE_CHEM)
-	M.adjust_perma(-5, FATTENING_TYPE_CHEM)
 	..()
 	. = 1
+
+/datum/reagent/fermi_slim/overdose_process(mob/living/M)
+	if(!iscarbon(M))
+		return..()
+	var/mob/living/carbon/C = M
+	C.fullness = max(0, C.fullness-5)
+	C.nutrition = max(0, C.nutrition-5)
+	C.weight_loss_rate = min(5, C.weight_loss_rate+0.01)
+	..()

code/modules/client/preferences.dm

@@ -105,7 +105,6 @@ GLOBAL_LIST_EMPTY(preferences_datums)
 
 	//GS13
 	var/starting_weight = 0				//how thicc you wanna be at start
-	var/permanent_fat = 0				//If it isn't the consequences of your own actions
 	var/wg_rate = 0.5
 	var/wl_rate = 0.5
 	var/voice = "human"
@@ -1077,7 +1076,7 @@ GLOBAL_LIST_EMPTY(preferences_datums)
 			dat += "This preference functions similar to the one before but allows for items with more drastic effects. <b>Do not enable this if you aren't okay with more drastic things happening to your character.</b><BR>"
 			dat += "<b>Extreme Fatness Vulnerability:</b><a href='?_src_=prefs;preference=extreme_fatness_vulnerable'>[extreme_fatness_vulnerable == TRUE ? "Enabled" : "Disabled"]</a><BR>"
 			dat += "<b>Extreme Weight Gain (Sprite Size scales with weight):</b><a href='?_src_=prefs;preference=weight_gain_extreme'>[weight_gain_extreme == TRUE ? "Enabled" : "Disabled"]</a><BR>"
-			dat += "<b>Weight Gain Permanent (special weight persists between rounds):</b><a href='?_src_=prefs;preference=weight_gain_permanent'>[weight_gain_permanent == TRUE ? "Enabled" : "Disabled"]</a><BR>"
+			dat += "<b>Weight Gain Permanent (endround/cryo weight becomes your new start weight):</b><a href='?_src_=prefs;preference=weight_gain_permanent'>[weight_gain_permanent == TRUE ? "Enabled" : "Disabled"]</a><BR>"
 
 			dat += "<h2>GS13 Helplessness Preferences</h2>"
 			dat += "<b>Please be careful when using these mechanics as not to use them in a way that negatively impacts those around you. If you are seriously needed for something, especially something station critical, do not use these as an excuse to ignore your duty.</b><BR><BR>"
@@ -3001,7 +3000,6 @@ GLOBAL_LIST_EMPTY(preferences_datums)
 	//GS13
 	character.fatness = starting_weight
 	character.fatness_real = starting_weight
-	character.fatness_perma = permanent_fat
 	character.weight_gain_rate = wg_rate
 	character.weight_loss_rate = wl_rate
 

code/modules/client/preferences_savefile.dm

@@ -333,7 +333,6 @@ SAVEFILE UPDATING/VERSIONING - 'Simplified', or rather, more coder-friendly ~Car
 	S["age"]				>> age
 	S["body_size"]			>> body_size
 	S["starting_weight"]	>> starting_weight
-	S["permanent_fat"]		>> permanent_fat
 	S["wg_rate"]			>> wg_rate
 	S["wl_rate"]			>> wl_rate
 	S["hair_color"]			>> hair_color