progress, just need to fiddle with footprints again

code/modules/mob/living/blood.dm

@@ -138,7 +138,7 @@
 
 	if(iscarbon(AM))
 		var/mob/living/carbon/C = AM
-		for(var/bluhduh in GLOB.blood_types[blood_id])
+		for(var/datum/reagent/blood/bluhduh in GLOB.blood_types[blood_id])
 			if(blood_id == C.get_blood_id())//both mobs have the same blood substance
 				if(bluhduh) //actual blood reagent
 					if(blood_data["viruses"])
@@ -171,7 +171,7 @@
 	return
 
 /mob/living/carbon/get_blood_data(blood_id)
-	for(var/bluhduh in GLOB.blood_types[blood_id])
+	for(var/datum/reagent/blood/bluhduh in GLOB.blood_types[blood_id])
 		if(bluhduh) //actual blood reagent
 			var/blood_data = list()
 			//set the blood data
@@ -183,6 +183,7 @@
 				blood_data["viruses"] += D.Copy()
 
 			blood_data["blood_DNA"] = copytext(dna.unique_enzymes,1,0)
+			blood_data["bloodcolor"] = bloodtype_to_color(dna.blood_type)
 			if(disease_resistances && disease_resistances.len)
 				blood_data["resistances"] = disease_resistances.Copy()
 			var/list/temp_chem = list()
@@ -201,7 +202,6 @@
 			if(!suiciding)
 				blood_data["cloneable"] = 1
 			blood_data["blood_type"] = copytext(dna.blood_type,1,0)
-			blood_data["bloodcolor"] = bloodtype_to_color(dna.blood_type)
 			blood_data["gender"] = gender
 			blood_data["real_name"] = real_name
 			blood_data["features"] = dna.features
@@ -234,7 +234,8 @@
 		return dna.species.exotic_blood
 	else if((NOBLOOD in dna.species.species_traits) || (has_trait(TRAIT_NOCLONE)))
 		return null
-	return "blood"
+	else
+		return "blood"
 
 // This is has more potential uses, and is probably faster than the old proc.
 /proc/get_safe_blood(bloodtype)

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

@@ -45,6 +45,8 @@
 
 	var/blood_state = BLOOD_STATE_NOT_BLOODY
 	var/list/blood_smear = list(BLOOD_STATE_BLOOD = 0, BLOOD_STATE_OIL = 0, BLOOD_STATE_NOT_BLOODY = 0)
+	var/last_bloodtype = ""//used to track the last bloodtype to have graced this smelly person. for smears on the floor
+	var/last_blood_DNA = ""//same as last one
 
 	var/name_override //For temporary visible name changes
 

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

@@ -66,10 +66,7 @@
 					FP.blood_state = S.blood_state
 					FP.entered_dirs |= dir
 					FP.bloodiness = S.bloody_shoes[S.blood_state]
-					FP.color = blood_DNA_to_color() //Color the blood with our dna stuff
-					if(S.last_blood_DNA && S.last_bloodtype)
-						FP.blood_DNA += list(S.last_blood_DNA = S.last_bloodtype)
-						//hacky as heck; we need to move the LAST entry to there, otherwise we mix all the blood
+					FP.color = bloodtype_to_color(S.last_bloodtype)
 					FP.update_icon()
 					update_inv_shoes()
 				//End bloody footprints
@@ -112,8 +109,7 @@
 							FP.blood_state = blood_state
 							FP.entered_dirs |= dir
 							FP.bloodiness = blood_smear - BLOOD_LOSS_IN_SPREAD
-							FP.transfer_blood_dna(blood_DNA)
-							FP.color = blood_DNA_to_color() //Color the blood with our dna stuff
+							FP.color = bloodtype_to_color(last_bloodtype)
 							FP.update_icon()
 
 			else //we're on the floor, smear some stuff around
@@ -133,8 +129,7 @@
 							FP.blood_state = blood_state
 							FP.entered_dirs |= dir
 							FP.bloodiness = blood_smear - BLOOD_LOSS_IN_SPREAD
-							FP.transfer_blood_dna(blood_DNA)
-							FP.color = blood_DNA_to_color() //Color the blood with our dna stuff
+							FP.color = bloodtype_to_color(last_bloodtype)
 							FP.update_icon()