nssm/rainbow_staff.lua

-- rainbow!

minetest.register_entity("nssm:rainbow", {
	textures = {"transparent.png"},
	velocity = 10,
	hp_max = 50,

	on_step = function (self, pos, node, dtime)

		self.timer = self.timer or os.time()

		local pos = self.object:get_pos()

		if minetest.is_protected(pos, "") then
			return
		end

		if os.time() - self.timer > 10 then
			minetest.set_node(pos, {name = "nyancat:nyancat"})
			self.object:remove()
		end

		if minetest.get_node(pos) then

			local n = minetest.get_node(pos).name

			if n ~= "nyancat:nyancat_rainbow" then

				if n == "air" then
					minetest.set_node(pos, {name = "nyancat:nyancat_rainbow"})
				else
					minetest.chat_send_all("Nome:" .. n)
					minetest.set_node(pos, {name = "nyancat:nyancat"})

					self.object:remove()
				end
			end
		end
	end
})

minetest.register_tool("nssm:rainbow_staff", {
	description = "Rainbow Staff",
	inventory_image = "rainbow_staff.png",
	groups = {not_in_creative_inventory = 1},

	on_use = function(itemstack, placer, pointed_thing)

		local dir = placer:get_look_dir()
		local playerpos = placer:get_pos()
		local obj = minetest.add_entity({
			x = playerpos.x + dir.x,
			y = playerpos.y + 2 + dir.y,
			z = playerpos.z + dir.z
		}, "nssm:rainbow")

		local vec = {x = dir.x * 6, y = dir.y * 6, z = dir.z * 6}

		obj:set_velocity(vec)

		return itemstack
	end
})