Tracking Slugs (#10287)

code/modules/projectiles/ammunition/bullets.dm

@@ -101,7 +101,7 @@
 
 /obj/item/ammo_casing/shotgun
 	name = "shotgun slug"
-	desc = "A 12 gauge slug."
+	desc = "A 12-gauge slug."
 	icon_state = "slshell"
 	spent_icon = "slshell-spent"
 	caliber = "shotgun"
@@ -111,7 +111,7 @@
 
 /obj/item/ammo_casing/shotgun/pellet
 	name = "shotgun shell"
-	desc = "A 12 gauge shell."
+	desc = "A 12-gauge shell."
 	icon_state = "gshell"
 	spent_icon = "gshell-spent"
 	projectile_type = /obj/item/projectile/bullet/pellet/shotgun
@@ -119,7 +119,7 @@
 
 /obj/item/ammo_casing/shotgun/blank
 	name = "shotgun shell"
-	desc = "A blank shell."
+	desc = "A 12-gauge blank shell."
 	icon_state = "blshell"
 	spent_icon = "blshell-spent"
 	projectile_type = /obj/item/projectile/bullet/blank
@@ -127,7 +127,7 @@
 
 /obj/item/ammo_casing/shotgun/practice
 	name = "shotgun shell"
-	desc = "A practice shell."
+	desc = "A 12-gauge practice shell."
 	icon_state = "pshell"
 	spent_icon = "pshell-spent"
 	projectile_type = /obj/item/projectile/bullet/shotgun/practice
@@ -135,7 +135,7 @@
 
 /obj/item/ammo_casing/shotgun/beanbag
 	name = "beanbag shell"
-	desc = "A beanbag shell."
+	desc = "A 12-gauge beanbag shell."
 	icon_state = "bshell"
 	spent_icon = "bshell-spent"
 	projectile_type = /obj/item/projectile/bullet/shotgun/beanbag
@@ -145,7 +145,7 @@
 //is blocked by clothing that stops tasers and is vulnerable to EMP
 /obj/item/ammo_casing/shotgun/stunshell
 	name = "stun shell"
-	desc = "A 12 gauge taser cartridge."
+	desc = "A 12-gauge taser cartridge."
 	icon_state = "stunshell"
 	spent_icon = "stunshell-spent"
 	projectile_type = /obj/item/projectile/energy/electrode/stunshot
@@ -159,7 +159,7 @@
 //Does not stun, only blinds, but has area of effect.
 /obj/item/ammo_casing/shotgun/flash
 	name = "flash shell"
-	desc = "A chemical shell used to signal distress or provide illumination."
+	desc = "A 12-gauge chemical shell used to signal distress or provide illumination."
 	icon_state = "fshell"
 	spent_icon = "fshell-spent"
 	projectile_type = /obj/item/projectile/energy/flash/flare
@@ -168,7 +168,7 @@
 
 /obj/item/ammo_casing/shotgun/incendiary
 	name = "incendiary shell"
-	desc = "A 12 gauge incendiary shell."
+	desc = "A 12-gauge incendiary shell."
 	icon_state = "ishell"
 	spent_icon = "ishell-spent"
 	projectile_type = /obj/item/projectile/bullet/shotgun/incendiary
@@ -179,10 +179,17 @@
 	desc = "A 12-gauge shotgun slug fitted with a single-use ion pulse generator."
 	icon_state = "empshell"
 	spent_icon = "empshell-spent"
-	projectile_type  = /obj/item/projectile/ion
+	projectile_type = /obj/item/projectile/ion
 	matter = list(DEFAULT_WALL_MATERIAL = 260, MATERIAL_URANIUM = 200)
 	reload_sound = 'sound/weapons/reload_shell_emp.ogg'
 
+/obj/item/ammo_casing/shotgun/tracking
+	name = "tracking slug"
+	desc = "A 12-gauge shotgun slug fitted with a tracking implant, set to activate upon embedding flesh."
+	icon_state = "trackingshell"
+	spent_icon = "trackingshell-spent"
+	projectile_type = /obj/item/projectile/bullet/tracking
+
 /obj/item/ammo_casing/tranq
 	name = "PPS shell"
 	desc = "A .50 cal PPS bullet casing."

code/modules/projectiles/projectile.dm

@@ -46,6 +46,7 @@
 
 	var/incinerate = 0
 	var/embed = 0 // whether or not the projectile can embed itself in the mob
+	var/embed_chance = 0 // a flat bonus to the % chance to embed
 	var/shrapnel_type //type of shrapnel the projectile leaves in its target.
 
 	var/p_x = 16
@@ -135,6 +136,16 @@
 		return FALSE
 	return TRUE
 
+/obj/item/projectile/proc/do_embed(var/obj/item/organ/external/organ)
+	var/obj/item/SP = new shrapnel_type(organ)
+	SP.edge = TRUE
+	SP.sharp = TRUE
+	SP.name = (name != "shrapnel") ? "[initial(name)] shrapnel" : "shrapnel"
+	SP.desc += " It looks like it was fired from [shot_from]."
+	SP.forceMove(organ)
+	organ.embed(SP)
+	return SP
+
 /obj/item/projectile/proc/get_structure_damage()
 	if(damage_type == BRUTE || damage_type == BURN)
 		return damage

code/modules/projectiles/projectile/bullets.dm

@@ -67,7 +67,6 @@
 	name = "shrapnel" //'shrapnel' sounds more dangerous (i.e. cooler) than 'pellet'
 	icon_state = "pellets"
 	damage = 20
-	//icon_state = "bullet" //TODO: would be nice to have it's own icon state
 	var/pellets = 4			//number of pellets
 	var/range_step = 2		//projectile will lose a fragment each time it travels this distance. Can be a non-integer.
 	var/base_spread = 90	//lower means the pellets spread more across body parts. If zero then this is considered a shrapnel explosion instead of a shrapnel cone
@@ -164,6 +163,22 @@
 	sharp = 0
 	incinerate = 10
 
+/obj/item/projectile/bullet/tracking
+	name = "tracking shot"
+	damage = 20
+	embed_chance = 60 // this thing was designed to embed, so it has a 80% base chance to embed (damage + this flat increase)
+	agony = 20
+	shrapnel_type = /obj/item/implant/tracking
+
+/obj/item/projectile/bullet/tracking/do_embed(obj/item/organ/external/organ)
+	. = ..()
+	if(.)
+		var/obj/item/implant/tracking/T = .
+		T.implanted = TRUE
+		T.imp_in = organ.owner
+		T.part = organ
+		LAZYADD(organ.implants, T)
+
 //Should do about 80 damage at 1 tile distance (adjacent), and 50 damage at 3 tiles distance.
 //Overall less damage than slugs in exchange for more damage at very close range and more embedding
 /obj/item/projectile/bullet/pellet/shotgun