Separate weapons and API

Use less generic mod names to avoid conflicts

shooter_hook/depends.txt

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+shooter
+shooter_guns

shooter_hook/init.lua

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+local function throw_hook(itemstack, user, vel)
+	local inv = user:get_inventory()
+	local pos = user:getpos()
+	local dir = user:get_look_dir()
+	local yaw = user:get_look_yaw()
+	if pos and dir and yaw then
+		if not minetest.setting_getbool("creative_mode") then
+			itemstack:add_wear(65535/100)
+		end
+		pos.y = pos.y + 1.5
+		local obj = minetest.add_entity(pos, "shooter_hook:hook")
+		if obj then
+			minetest.sound_play("shooter_throw", {object=obj})
+			obj:setvelocity({x=dir.x * vel, y=dir.y * vel, z=dir.z * vel})
+			obj:setacceleration({x=dir.x * -3, y=-10, z=dir.z * -3})
+			obj:setyaw(yaw + math.pi)
+			local ent = obj:get_luaentity()
+			if ent then
+				ent.player = ent.player or user
+				ent.itemstack = itemstack
+			end
+		end
+	end
+end
+
+minetest.register_entity("shooter_hook:hook", {
+	physical = true,
+	timer = 0,
+	visual = "wielditem",
+	visual_size = {x=1/2, y=1/2},
+	textures = {"shooter_hook:grapple_hook"},
+	player = nil,
+	itemstack = "",
+	collisionbox = {-1/4,-1/4,-1/4, 1/4,1/4,1/4},
+	on_activate = function(self, staticdata)
+		self.object:set_armor_groups({fleshy=0})
+		if staticdata == "expired" then
+			self.object:remove()
+		end
+	end,
+	on_step = function(self, dtime)
+		if not self.player then
+			return
+		end
+		self.timer = self.timer + dtime
+		if self.timer > 0.25 then
+			local pos = self.object:getpos()
+			local below = {x=pos.x, y=pos.y - 1, z=pos.z}
+			local node = minetest.get_node(below)
+			if node.name ~= "air" then
+				self.object:setvelocity({x=0, y=-10, z=0})
+				self.object:setacceleration({x=0, y=0, z=0})
+				if minetest.get_item_group(node.name, "liquid") == 0 and
+						minetest.get_node(pos).name == "air" then
+					self.player:moveto(pos)
+				end
+				if minetest.get_item_group(node.name, "lava") == 0 then
+					minetest.add_item(pos, self.itemstack)
+				end
+				self.object:remove()
+			end
+			self.timer = 0
+		end
+	end,
+	get_staticdata = function(self)
+		return "expired"
+	end,
+})
+
+minetest.register_tool("shooter_hook:grapple_hook", {
+	description = "Grappling Hook",
+	inventory_image = "shooter_hook.png",
+	on_use = function(itemstack, user, pointed_thing)
+		if pointed_thing.type ~= "nothing" then
+			return itemstack
+		end
+		throw_hook(itemstack, user, 14)
+		return ""
+	end,
+})
+
+minetest.register_tool("shooter_hook:grapple_gun", {
+	description = "Grappling Gun",
+	inventory_image = "shooter_hook_gun.png",
+	on_use = function(itemstack, user, pointed_thing)
+		local inv = user:get_inventory()
+		if inv:contains_item("main", "shooter_hook:grapple_hook") and 
+				inv:contains_item("main", "tnt:gunpowder") then
+			inv:remove_item("main", "tnt:gunpowder")
+			minetest.sound_play("shooter_reload", {object=user})
+			local stack = inv:remove_item("main", "shooter_hook:grapple_hook")
+			itemstack = "shooter_hook:grapple_gun_loaded 1 "..stack:get_wear()
+		else
+			minetest.sound_play("shooter_click", {object=user})
+		end
+		return itemstack
+	end,
+})
+
+minetest.register_tool("shooter_hook:grapple_gun_loaded", {
+	description = "Grappling Gun",
+	inventory_image = "shooter_hook_gun_loaded.png",
+	groups = {not_in_creative_inventory=1},
+	on_use = function(itemstack, user, pointed_thing)
+		if pointed_thing.type ~= "nothing" then
+			return itemstack
+		end
+		minetest.sound_play("shooter_pistol", {object=user})
+		itemstack = ItemStack("shooter_hook:grapple_hook 1 "..itemstack:get_wear())
+		throw_hook(itemstack, user, 20)
+		return "shooter_hook:grapple_gun"
+	end,
+})
+
+if SHOOTER_ENABLE_CRAFTING == true then
+	minetest.register_craft({
+		output = "shooter_hook:grapple_hook",
+		recipe = {
+			{"default:steel_ingot", "default:steel_ingot", "default:diamond"},
+			{"default:steel_ingot", "default:steel_ingot", ""},
+			{"default:diamond", "", "default:steel_ingot"},
+		},
+	})
+	minetest.register_craft({
+		output = "shooter_hook:grapple_gun",
+		recipe = {
+			{"", "default:steel_ingot", "default:steel_ingot"},
+			{"", "", "default:diamond"},
+		},
+	})
+end
+
+--Backwards compatibility
+minetest.register_alias("shooter:grapple_hook", "shooter_hook:grapple_hook")
+minetest.register_alias("shooter:grapple_gun", "shooter_hook:grapple_gun")
+minetest.register_alias("shooter:grapple_gun_loaded", "shooter_hook:grapple_gun_loaded")