Merge pull request #9189 from Sishen1542/gatling

[READY] craftable laser minigun, because why not

code/modules/crafting/recipes.dm

@@ -133,6 +133,18 @@
 	category = CAT_WEAPONRY
 	subcategory = CAT_WEAPON
 
+/datum/crafting_recipe/minigun
+	name = "Laser Minigun"
+	result = /obj/item/minigunpack2
+	reqs = list(/obj/item/gun/energy/laser/carbine = 3,
+				/obj/item/stack/sheet/plasteel = 5,
+				/obj/item/stack/cable_coil = 30,
+				/obj/item/stock_parts/cell/bluespace = 2)
+	tools = list(TOOL_WIRECUTTER, TOOL_SCREWDRIVER, TOOL_WELDER)
+	time = 150
+	category = CAT_WEAPONRY
+	subcategory = CAT_WEAPON
+
 /datum/crafting_recipe/ed209
 	name = "ED209"
 	result = /mob/living/simple_animal/bot/ed209

code/modules/projectiles/ammunition/energy/laser.dm

@@ -71,3 +71,9 @@
 	projectile_type = /obj/item/projectile/beam/mindflayer
 	select_name = "MINDFUCK"
 	fire_sound = 'sound/weapons/laser.ogg'
+
+/obj/item/ammo_casing/energy/laser/weak
+	projectile_type = /obj/item/projectile/beam/weak/minigun
+	e_cost = 10
+	fire_sound = 'sound/weapons/gatling.ogg'
+	click_cooldown_override = 1

code/modules/projectiles/guns/energy/minigun.dm

@@ -0,0 +1,149 @@
+//The ammo/gun is stored in a back slot item
+/obj/item/minigunpack2
+	name = " Laser Gatling Pack"
+	desc = "A massive battery pack with an attached laser gatling gun!"
+	icon = 'icons/obj/guns/minigun.dmi'
+	icon_state = "holstered"
+	item_state = "backpack"
+	lefthand_file = 'icons/mob/inhands/equipment/backpack_lefthand.dmi'
+	righthand_file = 'icons/mob/inhands/equipment/backpack_righthand.dmi'
+	slot_flags = ITEM_SLOT_BACK
+	w_class = WEIGHT_CLASS_HUGE
+	var/obj/item/gun/energy/minigun/gun
+	var/armed = 0 //whether the gun is attached, 0 is attached, 1 is the gun is wielded.
+	var/overheat = 0
+	var/overheat_max = 60
+	var/heat_diffusion = 5
+
+/obj/item/minigunpack2/Initialize()
+	. = ..()
+	gun = new(src)
+	START_PROCESSING(SSobj, src)
+
+/obj/item/minigunpack2/Destroy()
+	STOP_PROCESSING(SSobj, src)
+	return ..()
+
+/obj/item/minigunpack2/process()
+	overheat = max(0, overheat - heat_diffusion)
+
+//ATTACK HAND IGNORING PARENT RETURN VALUE
+/obj/item/minigunpack2/attack_hand(var/mob/living/carbon/user)
+	if(src.loc == user)
+		if(!armed)
+			if(user.get_item_by_slot(SLOT_BACK) == src)
+				armed = 1
+				if(!user.put_in_hands(gun))
+					armed = 0
+					to_chat(user, "<span class='warning'>You need a free hand to hold the gun!</span>")
+					return
+				update_icon()
+				user.update_inv_back()
+		else
+			to_chat(user, "<span class='warning'>You are already holding the gun!</span>")
+	else
+		..()
+
+/obj/item/minigunpack2/attackby(obj/item/W, mob/user, params)
+	if(W == gun) //Don't need armed check, because if you have the gun assume its armed.
+		user.dropItemToGround(gun, TRUE)
+	else
+		..()
+
+/obj/item/minigunpack2/dropped(mob/user)
+	if(armed)
+		user.dropItemToGround(gun, TRUE)
+
+/obj/item/minigunpack2/MouseDrop(atom/over_object)
+	. = ..()
+	if(armed)
+		return
+	if(iscarbon(usr))
+		var/mob/M = usr
+
+		if(!over_object)
+			return
+
+		if(!M.incapacitated())
+
+			if(istype(over_object, /obj/screen/inventory/hand))
+				var/obj/screen/inventory/hand/H = over_object
+				M.putItemFromInventoryInHandIfPossible(src, H.held_index)
+
+
+/obj/item/minigunpack2/update_icon()
+	if(armed)
+		icon_state = "notholstered"
+	else
+		icon_state = "holstered"
+
+/obj/item/minigunpack2/proc/attach_gun(var/mob/user)
+	if(!gun)
+		gun = new(src)
+	gun.forceMove(src)
+	armed = 0
+	if(user)
+		to_chat(user, "<span class='notice'>You attach the [gun.name] to the [name].</span>")
+	else
+		src.visible_message("<span class='warning'>The [gun.name] snaps back onto the [name]!</span>")
+	update_icon()
+	user.update_inv_back()
+
+
+/obj/item/gun/energy/minigun
+	name = "laser gatling gun"
+	desc = "An advanced laser cannon with an incredible rate of fire. Requires a bulky backpack power source to use."
+	icon = 'icons/obj/guns/minigun.dmi'
+	icon_state = "minigun_spin"
+	item_state = "minigun"
+	flags_1 = CONDUCT_1
+	force = 15
+	recoil = 2
+	slowdown = 1
+	slot_flags = null
+	w_class = WEIGHT_CLASS_HUGE
+	materials = list()
+	ammo_type = list(/obj/item/ammo_casing/energy/laser/weak)
+	burst_size = 2
+	automatic = 1
+	can_charge = 0
+	selfcharge = EGUN_SELFCHARGE
+	charge_tick = 2
+	charge_delay = 5
+	weapon_weight = WEAPON_HEAVY
+	item_flags = NEEDS_PERMIT | SLOWS_WHILE_IN_HAND
+	var/obj/item/minigunpack2/ammo_pack
+
+/obj/item/gun/energy/minigun/Initialize()
+	if(istype(loc, /obj/item/minigunpack2)) //We should spawn inside an ammo pack so let's use that one.
+		ammo_pack = loc
+	else
+		return INITIALIZE_HINT_QDEL //No pack, no gun
+
+	return ..()
+
+/obj/item/gun/energy/minigun/attack_self(mob/living/user)
+	return
+
+/obj/item/gun/energy/minigun/dropped(mob/user)
+	if(ammo_pack)
+		ammo_pack.attach_gun(user)
+	else
+		qdel(src)
+
+/obj/item/gun/energy/minigun/process_fire(atom/target, mob/living/user, message = TRUE, params = null, zone_override = "", bonus_spread = 0)
+	if(ammo_pack)
+		if(ammo_pack.overheat < ammo_pack.overheat_max)
+			ammo_pack.overheat += burst_size
+			..()
+		else
+			to_chat(user, "The gun's heat sensor locked the trigger to prevent lens damage.")
+
+/obj/item/gun/energy/minigun/afterattack(atom/target, mob/living/user, flag, params)
+	if(!ammo_pack || ammo_pack.loc != user)
+		to_chat(user, "You need the backpack power source to fire the gun!")
+	. = ..()
+
+/obj/item/gun/energy/minigun/dropped(mob/living/user)
+	ammo_pack.attach_gun(user)
+

code/modules/projectiles/projectile/beams.dm

@@ -39,6 +39,14 @@
 /obj/item/projectile/beam/weak
 	damage = 15
 
+/obj/item/projectile/beam/weak/minigun
+	damage = 12.5
+	armour_penetration = 40
+
+/obj/item/projectile/beam/weak/minigun/Initialize()
+	.=..()
+	speed = pick(0.7,0.75,0.8,0.85,0.9,0.95,1,1.05,1.1,1.15)
+
 /obj/item/projectile/beam/weak/penetrator
 	armour_penetration = 50