shooter/shooter_rocket/init.lua

--[[
Shooter Rocket Gun [shooter_rocket]
Copyright (C) 2013-2019 stujones11, Stuart Jones

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
]]--

local ROCKET_COOLDOWN = 6
local RELOAD_TIME = 2

minetest.register_craftitem("shooter_rocket:rocket", {
	description = "Single-use Rocket",
    stack_max = 1,
	inventory_image = "shooter_rocket_inv.png",
})

minetest.register_entity("shooter_rocket:rocket_entity", {
	physical = false,
	timer = 0,
	visual = "cube",
	visual_size = {x=1/8, y=1/8},
	textures = {
		"shooter_bullet.png",
		"shooter_bullet.png",
		"shooter_bullet.png",
		"shooter_bullet.png",
		"shooter_bullet.png",
		"shooter_bullet.png",
	},
	user = nil,
	collisionbox = {0,0,0, 0,0,0},
	on_activate = function(self, staticdata)
		if staticdata == "expired" then
			self.object:remove()
		end
	end,
	on_step = function(self, dtime)
		self.timer = self.timer + dtime
		if self.timer > 0.2 then
			local pos = self.object:get_pos()
			local above = {x=pos.x, y=pos.y + 1, z=pos.z}
			if minetest.get_node(pos).name ~= "air" then
				if self.user then
					local player = minetest.get_player_by_name(self.user)
					if player then
						shooter.blast(above, 4, 50, 8, player)
					end
				end
				self.object:remove()
			end
			self.timer = 0
		end
	end,
	get_staticdata = function()
		return "expired"
	end,
})

minetest.register_tool("shooter_rocket:rocket_gun_loaded", {
	description = "Rocket Gun",
	inventory_image = "shooter_rocket_gun_loaded.png",
	groups = {not_in_creative_inventory=1},
	on_use = function(itemstack, user, pointed_thing)
		if pointed_thing.type == "nothing" then
			itemstack = "shooter_rocket:rocket_gun 1 "..(65535 - 6000)
			ctf_classes.update_wear.start_update(
				user:get_player_name(),
				"shooter_rocket:rocket_gun",
				65535/RELOAD_TIME,
				true
			)

			local pos = user:get_pos()
			local dir = user:get_look_dir()
			local yaw = user:get_look_horizontal()
			local username = user:get_player_name()
			if pos and dir and yaw then
				pos.y = pos.y + user:get_properties().eye_height
				local obj = minetest.add_entity(pos, "shooter_rocket:rocket_entity")
				if obj then
					minetest.sound_play("shooter_rocket_fire", {object=obj})
					obj:set_velocity(vector.multiply(dir, 20))
					obj:set_acceleration({x=dir.x * -3, y=-10, z=dir.z * -3})
					obj:set_yaw(yaw + math.pi / 2)
					local ent = obj:get_luaentity()
					if ent then
						ent.user = username
					end
				end
			end
		end
		return itemstack
	end,
})

minetest.register_tool("shooter_rocket:rocket_gun", {
	description = "Rocket Gun",
	inventory_image = "shooter_rocket_gun.png",
	on_use = function(itemstack, user)
		local inv = user:get_inventory()
		local pos, stack = ctf_classes.update_wear.find_item(inv, "ctf_classes:rocket")

		if itemstack:get_wear() ~= 0 then
			return
		elseif pos and stack:get_wear() == 0 then
			minetest.sound_play("shooter_reload", {object=user})

			stack:set_wear(65535 - 6000)
			inv:set_stack("main", pos, stack)
			ctf_classes.update_wear.start_update(
				user:get_player_name(),
				"ctf_classes:rocket",
				65535/ROCKET_COOLDOWN,
				true
			)

			itemstack = "shooter_rocket:rocket_gun_loaded 1 "
		elseif inv:contains_item("main", "shooter_rocket:rocket") then
			minetest.sound_play("shooter_reload", {object=user})
			if not minetest.settings:get_bool("creative_mode") then
				inv:remove_item("main", "shooter_rocket:rocket 1")
			end
			itemstack = "shooter_rocket:rocket_gun_loaded 1 "
		else
			minetest.sound_play("shooter_click", {object=user})
		end
		return itemstack
	end,
})

if shooter.config.enable_crafting == true then
	minetest.register_craft({
		output = "shooter_rocket:rocket_gun",
		recipe = {
			{"default:bronze_ingot", "default:steel_ingot", "default:steel_ingot"},
			{"", "", "default:diamond"},
		},
	})
	minetest.register_craft({
		output = "shooter_rocket:rocket",
		type = "shapeless",
		recipe = {"default:bronze_ingot", "shooter:gunpowder", "default:bronze_ingot"},
	})
end

local timer = 0
minetest.register_globalstep(function(dtime)
	timer = timer + dtime
	if timer >= 1 then
		timer = 0
		for _, player in ipairs(minetest.get_connected_players()) do
			local name = player and player:get_player_name()
			local wielditem = player:get_wielded_item()
			if wielditem:get_name() == "shooter_rocket:rocket_gun_loaded" then
				local wielditem = player:get_wielded_item()
				physics.set(name, "shooter_rocket:physics", {
					speed = 0.7
				})
			else
				physics.remove(name, "shooter_rocket:physics")
			end
		end
	end
end)

--Backwards compatibility
minetest.register_alias("shooter:rocket", "shooter_rocket:rocket")
minetest.register_alias("shooter:rocket_gun", "shooter_rocket:rocket_gun")
minetest.register_alias("shooter:rocket_gun_loaded", "shooter_rocket:rocket_gun_loaded")