VoxeLibre/mods/ITEMS/mcl_throwing/init.lua

mcl_throwing = {}

dofile(minetest.get_modpath("mcl_throwing").."/arrow.lua")
dofile(minetest.get_modpath("mcl_throwing").."/throwable.lua")

local arrows = {
	["mcl_throwing:arrow"] = "mcl_throwing:arrow_entity",
}

local GRAVITY = 9.81

local bow_durability = 385

mcl_throwing.shoot_arrow = function(arrow_item, pos, dir, yaw, shooter, power, damage)
	local obj = minetest.add_entity({x=pos.x,y=pos.y,z=pos.z}, arrows[arrow_item])
	if power == nil then
		power = 19
	end
	if damage == nil then
		damage = 3
	end
	obj:setvelocity({x=dir.x*power, y=dir.y*power, z=dir.z*power})
	obj:setacceleration({x=dir.x*-3, y=-GRAVITY, z=dir.z*-3})
	obj:setyaw(yaw-math.pi/2)
	local le = obj:get_luaentity()
	le._shooter = shooter
	le._damage = damage
	le._startpos = pos
	minetest.sound_play("mcl_throwing_bow_shoot", {pos=pos})
	if shooter ~= nil then
		if obj:get_luaentity().player == "" then
			obj:get_luaentity().player = shooter
		end
		obj:get_luaentity().node = shooter:get_inventory():get_stack("main", 1):get_name()
	end
	return obj
end

local get_arrow = function(player)
	local inv = player:get_inventory()
	local arrow_stack, arrow_stack_id
	for i=1, inv:get_size("main") do
		local it = inv:get_stack("main", i)
		if not it:is_empty() and minetest.get_item_group(it:get_name(), "ammo_bow") ~= 0 then
			arrow_stack = it
			arrow_stack_id = i
			break
		end
	end
	return arrow_stack, arrow_stack_id
end

local player_shoot_arrow = function(itemstack, player, power, damage)
	local arrow_stack, arrow_stack_id = get_arrow(player)
	local arrow_itemstring
	if not minetest.setting_getbool("creative_mode") then
		if not arrow_stack then
			return false
		end
		arrow_itemstring = arrow_stack:get_name()
		arrow_stack:take_item()
		local inv = player:get_inventory()
		inv:set_stack("main", arrow_stack_id, arrow_stack)
	end
	local playerpos = player:getpos()
	local dir = player:get_look_dir()
	local yaw = player:get_look_horizontal()

	if not arrow_itemstring then
		arrow_itemstring = "mcl_throwing:arrow"
	end
	mcl_throwing.shoot_arrow(arrow_itemstring, {x=playerpos.x,y=playerpos.y+1.5,z=playerpos.z}, dir, yaw, player, power, damage)
	return true
end

local powerup_function = function(nextbow)
	return function(itemstack, placer, pointed_thing)
		-- Use pointed node's on_rightclick function first, if present
		if pointed_thing.type == "node" then
			local node = minetest.get_node(pointed_thing.under)
			if placer and not placer:get_player_control().sneak then
				if minetest.registered_nodes[node.name] and minetest.registered_nodes[node.name].on_rightclick then
					return minetest.registered_nodes[node.name].on_rightclick(pointed_thing.under, node, placer, itemstack) or itemstack
				end
			end
		end

		-- Check for arrow or Creative Mode
		if minetest.setting_getbool("creative_mode") or get_arrow(placer) ~= nil then
			local wear = itemstack:get_wear()
			itemstack:replace(nextbow)
			itemstack:set_wear(wear)
		end
		return itemstack
	end
end

minetest.register_tool("mcl_throwing:bow", {
	description = "Bow",
	_doc_items_longdesc = "Bows are ranged weapons to shoot arrows at your foes.",
	_doc_items_usagehelp = [[To use the bow, you first need to have at least one arrow anywhere in your inventory (unless in Creative Mode). Rightclick one to three times to charge the bow. Leftclick to shoot.

The arrow speed and damage increase with the charge level:
• Low charge: 1 damage
• Medium charge: 2 damage
• High charge: 4-5 damage (20% chance for 5 damage)]],
	_doc_items_durability = bow_durability,
	inventory_image = "mcl_throwing_bow.png",
	stack_max = 1,
	-- Trick to disable melee damage to entities.
	-- Range not set to 0 (unlike the others) so it can be placed into item frames
	range = 1,
	-- Trick to disable digging as well
	on_use = function() end,
	on_place = powerup_function("mcl_throwing:bow_0"),
	on_secondary_use = powerup_function("mcl_throwing:bow_0"),
	groups = {weapon=1,weapon_ranged=1},
})

minetest.register_tool("mcl_throwing:bow_0", {
	description = "Bow",
	_doc_items_create_entry = false,
	inventory_image = "mcl_throwing_bow_0.png",
	stack_max = 1,
	range = 0, -- Pointing range to 0 to prevent punching with bow :D
	groups = {not_in_creative_inventory=1, not_in_craft_guide=1},
	on_place = powerup_function("mcl_throwing:bow_1"),
	on_secondary_use = powerup_function("mcl_throwing:bow_1"),
	on_use = function(itemstack, user, pointed_thing)
		local wear = itemstack:get_wear()
		itemstack:replace("mcl_throwing:bow")
		itemstack:set_wear(wear)
		if player_shoot_arrow(itemstack, user, 4, 1) then
			if not minetest.setting_getbool("creative_mode") then
				itemstack:add_wear(65535/bow_durability)
			end
		end
		return itemstack
	end,
})

minetest.register_tool("mcl_throwing:bow_1", {
	description = "Bow",
	_doc_items_create_entry = false,
	inventory_image = "mcl_throwing_bow_1.png",
	stack_max = 1,
	range = 0,
	groups = {not_in_creative_inventory=1, not_in_craft_guide=1},
	on_place = powerup_function("mcl_throwing:bow_2"),
	on_secondary_use = powerup_function("mcl_throwing:bow_2"),
	on_use = function(itemstack, user, pointed_thing)
		local wear = itemstack:get_wear()
		itemstack:replace("mcl_throwing:bow")
		itemstack:set_wear(wear)
		if player_shoot_arrow(itemstack, user, 16, 2) then
			if not minetest.setting_getbool("creative_mode") then
				itemstack:add_wear(65535/bow_durability)
			end
		end
		return itemstack
	end,
})

minetest.register_tool("mcl_throwing:bow_2", {
	description = "Bow",
	_doc_items_create_entry = false,
	inventory_image = "mcl_throwing_bow_2.png",
	stack_max = 1,
	range = 0,
	groups = {not_in_creative_inventory=1, not_in_craft_guide=1},
	on_use = function(itemstack, user, pointed_thing)
		local wear = itemstack:get_wear()
		itemstack:replace("mcl_throwing:bow")
		itemstack:set_wear(wear)
		local r = math.random(1,5)
		local damage
		-- Damage and range have been nerfed because the arrow charges very quickly
		-- TODO: Use Minecraft damage and range (9-10 @ ca. 53 m/s)
		if r == 1 then
			-- 20% chance to do more damage
			damage = 5
		else
			damage = 4
		end
		if player_shoot_arrow(itemstack, user, 26, damage) then
			if not minetest.setting_getbool("creative_mode") then
				itemstack:add_wear(65535/bow_durability)
			end
		end
		return itemstack
	end,
})

minetest.register_craft({
	output = 'mcl_throwing:bow',
	recipe = {
		{'', 'mcl_core:stick', 'mcl_mobitems:string'},
		{'mcl_core:stick', '', 'mcl_mobitems:string'},
		{'', 'mcl_core:stick', 'mcl_mobitems:string'},
	}
})
minetest.register_craft({
	output = 'mcl_throwing:bow',
	recipe = {
		{'mcl_mobitems:string', 'mcl_core:stick', ''},
		{'mcl_mobitems:string', '', 'mcl_core:stick'},
		{'mcl_mobitems:string', 'mcl_core:stick', ''},
	}
})

minetest.register_craft({
	type = "fuel",
	recipe = "mcl_throwing:bow",
	burntime = 15,
})

-- Add entry aliases for the Help
if minetest.get_modpath("doc") then
	doc.add_entry_alias("tools", "mcl_throwing:bow", "tools", "mcl_throwing:bow_0")
	doc.add_entry_alias("tools", "mcl_throwing:bow", "tools", "mcl_throwing:bow_1")
	doc.add_entry_alias("tools", "mcl_throwing:bow", "tools", "mcl_throwing:bow_2")
end