Added organ mutations.

Only have sprites for humans yet.
Added is_usable() proc that checks for both limb missing or being a tentacle

code/modules/mob/living/carbon/carbon.dm

@@ -54,8 +54,8 @@
 		var/datum/organ/external/temp = M:organs_by_name["r_hand"]
 		if (M.hand)
 			temp = M:organs_by_name["l_hand"]
-		if(temp && temp.status & ORGAN_DESTROYED)
-			M << "\red Yo- wait a minute."
+		if(temp && !temp.is_usable())
+			M << "\red You can't use your [temp.display_name]"
 			return
 
 	for(var/datum/disease/D in viruses)
@@ -80,8 +80,8 @@
 		var/datum/organ/external/temp = M:organs_by_name["r_hand"]
 		if (M.hand)
 			temp = M:organs_by_name["l_hand"]
-		if(temp && temp.status & ORGAN_DESTROYED)
-			M << "\red Yo- wait a minute."
+		if(temp && !temp.is_usable())
+			M << "\red You can't use your [temp.display_name]"
 			return
 
 	for(var/datum/disease/D in viruses)
@@ -187,6 +187,8 @@
 					status += "numb"
 				if(org.status & ORGAN_DESTROYED)
 					status = "MISSING!"
+				if(org.status & ORGAN_MUTATED)
+					status = "weirdly shapen."
 				if(status == "")
 					status = "OK"
 				src.show_message(text("\t []My [] is [].",status=="OK"?"\blue ":"\red ",org.display_name,status),1)

code/modules/mob/living/carbon/human/update_icons.dm

@@ -126,7 +126,8 @@ Please contact me on #coderbus IRC. ~Carn x
 	var/list/overlays_lying[TOTAL_LAYERS]
 	var/list/overlays_standing[TOTAL_LAYERS]
 	var/previous_damage_appearance // store what the body last looked like, so we only have to update it if something changed
-	var/race_icon
+	var/icon/race_icon
+	var/icon/deform_icon
 
 //UPDATES OVERLAYS FROM OVERLAYS_LYING/OVERLAYS_STANDING
 //this proc is messy as I was forced to include some old laggy cloaking code to it so that I don't break cloakers
@@ -239,7 +240,6 @@ proc/get_damage_icon_part(damage_state, body_part)
 		if(husk)
 			stand_icon.ColorTone(husk_color_mod)
 		else if(hulk)
-//			stand_icon.ColorTone(hulk_color_mod)
 			var/list/TONE = ReadRGB(hulk_color_mod)
 			stand_icon.MapColors(rgb(TONE[1],0,0),rgb(0,TONE[2],0),rgb(0,0,TONE[3]))
 		else if(plant)
@@ -254,29 +254,19 @@ proc/get_damage_icon_part(damage_state, body_part)
 
 	for(var/datum/organ/external/part in organs)
 		if(!istype(part, /datum/organ/external/chest) && !(part.status & ORGAN_DESTROYED))
-			var/icon/temp
-			if(istype(part, /datum/organ/external/groin))
-				if(skeleton)
-					temp = new /icon(race_icon, "groin")
-				else
-					temp = new /icon(race_icon, "groin_[g]")
-			else if(istype(part, /datum/organ/external/head))
-				if(skeleton)
-					temp = new /icon(race_icon, "head")
-				else
-					temp = new /icon(race_icon, "head_[g]")
-			else
-				temp = new /icon(race_icon, "[part.icon_name]")
+			var/icon/temp = part.get_icon()
+
 			if(part.status & ORGAN_ROBOT)
 				temp.GrayScale()
+
 			if(part.status & ORGAN_DEAD)
 				temp.ColorTone(necrosis_color_mod)
 				temp.SetIntensity(0.7)
+
 			else if(!skeleton)
 				if(husk)
 					temp.ColorTone(husk_color_mod)
 				else if(hulk)
-//					temp.ColorTone(hulk_color_mod)
 					var/list/TONE = ReadRGB(hulk_color_mod)
 					temp.MapColors(rgb(TONE[1],0,0),rgb(0,TONE[2],0),rgb(0,0,TONE[3]))
 				else if(plant)
@@ -442,12 +432,16 @@ proc/get_damage_icon_part(damage_state, body_part)
 		switch(dna.mutantrace)
 			if("tajaran")
 				race_icon = 'icons/mob/human_races/r_tajaran.dmi'
+				deform_icon = 'icons/mob/human_races/r_def_tajaran.dmi'
 			if("lizard")
 				race_icon = 'icons/mob/human_races/r_lizard.dmi'
+				deform_icon = 'icons/mob/human_races/r_def_lizard.dmi'
 			if("skrell")
 				race_icon = 'icons/mob/human_races/r_skrell.dmi'
+				deform_icon = 'icons/mob/human_races/r_def_skrell.dmi'
 			else
 				race_icon = 'icons/mob/human_races/r_human.dmi'
+				deform_icon = 'icons/mob/human_races/r_def_human.dmi'
 	else
 		icon = 'icons/mob/human_races/r_human.dmi'
 

code/modules/organs/organ.dm

@@ -11,6 +11,9 @@
 	proc/receive_chem(chemical as obj)
 		return 0
 
+/datum/organ/proc/get_icon()
+	return icon('icons/mob/human.dmi',"blank")
+
 //Handles chem traces
 /mob/living/carbon/human/proc/handle_trace_chems()
 	//New are added for reagents to random organs.

code/modules/organs/organ_external.dm

@@ -547,6 +547,11 @@
 		if(T)
 			T.robotize()
 
+/datum/organ/external/proc/mutate()
+	src.status |= ORGAN_MUTATED
+	owner << "<span class = 'notice'>Something is not right with your [display_name]...</span>"
+	owner.update_body()
+
 /datum/organ/external/proc/get_damage()	//returns total damage
 	return max(brute_dam + burn_dam - perma_injury, perma_injury)	//could use health?
 
@@ -556,6 +561,15 @@
 			return 1
 	return 0
 
+/datum/organ/external/get_icon()
+	if (status & ORGAN_MUTATED)
+		. = new /icon(owner.deform_icon, "[icon_name]")
+	else
+		. = new /icon(owner.race_icon, "[icon_name]")
+
+/datum/organ/external/proc/is_usable()
+	return !(status & (ORGAN_DESTROYED|ORGAN_MUTATED|ORGAN_DEAD))
+
 /****************************************************
 			   ORGAN DEFINES
 ****************************************************/
@@ -576,6 +590,14 @@
 	min_broken_damage = 70
 	body_part = LOWER_TORSO
 
+/datum/organ/external/groin/get_icon()
+	var/g = "m"
+	if(owner.gender == FEMALE)	g = "f"
+	if (status & ORGAN_MUTATED)
+		. = new /icon(owner.deform_icon, "[icon_name]_[g]")
+	else
+		. = new /icon(owner.race_icon, "[icon_name]_[g]")
+
 /datum/organ/external/l_arm
 	name = "l_arm"
 	display_name = "left arm"
@@ -653,27 +675,37 @@
 	body_part = HEAD
 	var/disfigured = 0
 
-	take_damage(brute, burn, sharp, used_weapon = null, list/forbidden_limbs = list())
-		..(brute, burn, sharp, used_weapon, forbidden_limbs)
-		if (!disfigured)
-			if (brute_dam > 40)
-				if (prob(50))
-					disfigure("brute")
-			if (burn_dam > 40)
-				disfigure("burn")
+/datum/organ/external/head/get_icon()
+	if (!owner)
+	 return ..()
+	var/g = "m"
+	if(owner.gender == FEMALE)	g = "f"
+	if (status & ORGAN_MUTATED)
+		. = new /icon(owner.deform_icon, "[icon_name]_[g]")
+	else
+		. = new /icon(owner.race_icon, "[icon_name]_[g]")
 
-	proc/disfigure(var/type = "brute")
-		if (disfigured)
-			return
-		if(type == "brute")
-			owner.visible_message("\red You hear a sickening cracking sound coming from \the [owner]'s face.",	\
-			"\red <b>Your face becomes unrecognizible mangled mess!</b>",	\
-			"\red You hear a sickening crack.")
-		else
-			owner.visible_message("\red [owner]'s face melts away, turning into mangled mess!",	\
-			"\red <b>Your face melts off!</b>",	\
-			"\red You hear a sickening sizzle.")
-		disfigured = 1
+/datum/organ/external/head/take_damage(brute, burn, sharp, used_weapon = null, list/forbidden_limbs = list())
+	..(brute, burn, sharp, used_weapon, forbidden_limbs)
+	if (!disfigured)
+		if (brute_dam > 40)
+			if (prob(50))
+				disfigure("brute")
+		if (burn_dam > 40)
+			disfigure("burn")
+
+/datum/organ/external/head/proc/disfigure(var/type = "brute")
+	if (disfigured)
+		return
+	if(type == "brute")
+		owner.visible_message("\red You hear a sickening cracking sound coming from \the [owner]'s face.",	\
+		"\red <b>Your face becomes unrecognizible mangled mess!</b>",	\
+		"\red You hear a sickening crack.")
+	else
+		owner.visible_message("\red [owner]'s face melts away, turning into mangled mess!",	\
+		"\red <b>Your face melts off!</b>",	\
+		"\red You hear a sickening sizzle.")
+	disfigured = 1
 
 /****************************************************
 			   EXTERNAL ORGAN ITEMS

code/setup.dm

@@ -582,6 +582,7 @@ var/list/TAGGERLOCATIONS = list("Disposals",
 #define ORGAN_SPLINTED 256
 #define SALVED 512
 #define ORGAN_DEAD 1024
+#define ORGAN_MUTATED 2048
 
 #define ROUNDSTART_LOGOUT_REPORT_TIME 6000 //Amount of time (in deciseconds) after the rounds starts, that the player disconnect report is issued.