blood drip randomization + ammo casings (#3731)

mapping tools as title

:cl:
code: more spent casings + blood drips moving themselves on mapload
/:cl:

code/game/objects/effects/decals/cleanable/humans.dm

@@ -178,6 +178,16 @@
 	var/drips = 1
 	dryname = "drips of blood"
 	drydesc = "It's red."
+	var/move_on_init = TRUE
+
+/obj/effect/decal/cleanable/blood/drip/Initialize(mapload, list/datum/disease/diseases)
+	. = ..()
+	dry()
+	add_blood_DNA(list("Non-human DNA" = random_blood_type()))
+	if(move_on_init)
+		pixel_x = rand(-16,16)
+		pixel_y = rand(-16, 16)
+
 
 /obj/effect/decal/cleanable/blood/drip/can_bloodcrawl_in()
 	return TRUE

code/modules/projectiles/ammunition/_ammo_casing.dm

@@ -153,10 +153,6 @@
 	ammo_stack.update_ammo_count()
 	return ammo_stack
 
-/obj/item/ammo_casing/spent
-	name = "spent bullet casing"
-	BB = null
-
 /obj/item/ammo_casing/Initialize()
 	. = ..()
 	if(projectile_type)
@@ -216,3 +212,44 @@
 
 	else if(location.bullet_bounce_sound)
 		addtimer(CALLBACK(GLOBAL_PROC, GLOBAL_PROC_REF(playsound), src, pick(location.bullet_bounce_sound), 20, 1), bounce_delay) //Soft / non-solid turfs that shouldn't make a sound when a shell casing is ejected over them.
+
+/obj/item/ammo_casing/spent
+	name = "spent bullet casing"
+	projectile_type = null
+	BB = null
+
+/obj/item/ammo_casing/spent/pistol_brass
+	icon_state = "pistol-brass"
+
+/obj/item/ammo_casing/spent/pistol_steel
+	icon_state = "pistol-steel"
+
+/obj/item/ammo_casing/spent/magnum_brass
+	icon_state = "magnum-brass"
+
+/obj/item/ammo_casing/spent/magnum_steel
+	icon_state = "magnum-steel"
+
+/obj/item/ammo_casing/spent/rifle_brass
+	icon_state = "rifle-brass"
+
+/obj/item/ammo_casing/spent/rifle_steel
+	icon_state = "rifle-steel"
+
+/obj/item/ammo_casing/spent/big_brass
+	icon_state = "big-brass"
+
+/obj/item/ammo_casing/spent/big_steel
+	icon_state = "big-steel" //balls
+
+/obj/item/ammo_casing/spent/slug
+	icon_state = "slug"
+
+/obj/item/ammo_casing/spent/slug/buck
+	icon_state = "buckshot"
+
+/obj/item/ammo_casing/spent/slug/beanbag
+	icon_state = "beanbag"
+
+/obj/item/ammo_casing/spent/slug/rubber
+	icon_state = "rubber"