item_drop/init.lua

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local load_time_start = minetest.get_us_time()
-- Functions which can be overridden by mods
item_drop = {
-- This function is executed before picking up an item or making it fly to
-- the player. If it does not return true, the item is ignored.
-- It is also executed before collecting the item after it flew to
-- the player and did not reach him/her for magnet_time seconds.
can_pickup = function(entity, player)
if entity.item_drop_picked then
-- Ignore items where picking has already failed
return false
end
return true
end,
-- before_collect and after_collect are executed before and after an item
-- is collected by a player
before_collect = function(entity, pos, player)
end,
after_collect = function(entity, pos, player)
entity.item_drop_picked = true
end,
}
local function legacy_setting_getbool(name_new, name_old, default)
local v = minetest.settings:get_bool(name_new)
if v == nil then
v = minetest.settings:get_bool(name_new)
end
if default then
return v ~= false
end
return v
end
local function legacy_setting_getnumber(name_new, name_old, default)
return tonumber(minetest.settings:get(name_new))
or tonumber(minetest.settings:get(name_old))
or default
end
if legacy_setting_getbool("item_drop.enable_item_pickup",
"enable_item_pickup", true) then
local pickup_gain = legacy_setting_getnumber("item_drop.pickup_sound_gain",
"item_pickup_gain", 0.2)
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local pickup_particle =
minetest.settings:get_bool("item_drop.pickup_particle", true)
local pickup_radius = legacy_setting_getnumber("item_drop.pickup_radius",
"item_pickup_radius", 0.75)
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local magnet_radius = tonumber(
minetest.settings:get("item_drop.magnet_radius")) or -1
local magnet_time = tonumber(
minetest.settings:get("item_drop.magnet_time")) or 5.0
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local pickup_age = tonumber(
minetest.settings:get("item_drop.pickup_age")) or 0.5
local key_triggered = legacy_setting_getbool("item_drop.enable_pickup_key",
"enable_item_pickup_key", true)
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local key_invert = minetest.settings:get_bool(
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"item_drop.pickup_keyinvert") ~= false
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local keytype
if key_triggered then
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keytype = minetest.settings:get("item_drop.pickup_keytype") or
minetest.settings:get("item_pickup_keytype") or "Use"
-- disable pickup age if picking is explicitly enabled by the player
if not key_invert then
pickup_age = math.min(pickup_age, 0)
end
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end
local mouse_pickup = minetest.settings:get_bool(
"item_drop.mouse_pickup") ~= false
if not mouse_pickup then
minetest.registered_entities["__builtin:item"].pointable = false
end
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local magnet_mode = magnet_radius > pickup_radius
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local zero_velocity_mode = pickup_age == -1
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if magnet_mode
and zero_velocity_mode then
error"zero velocity mode can't be used together with magnet mode"
end
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-- tells whether an inventorycube should be shown as pickup_particle or not
-- for known drawtypes
local inventorycube_drawtypes = {
normal = true,
allfaces = true,
allfaces_optional = true,
glasslike = true,
glasslike_framed = true,
glasslike_framed_optional = true,
liquid = true,
flowingliquid = true,
}
-- adds the item to the inventory and removes the object
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local function collect_item(ent, pos, player)
item_drop.before_collect(ent, pos, player)
minetest.sound_play("item_drop_pickup", {
pos = pos,
gain = pickup_gain,
})
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if pickup_particle then
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local item = minetest.registered_nodes[
ent.itemstring:gsub("(.*)%s.*$", "%1")]
local image
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if item and item.tiles and item.tiles[1] then
if inventorycube_drawtypes[item.drawtype] then
local tiles = item.tiles
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local top = tiles[1]
if type(top) == "table" then
top = top.name
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end
local left = tiles[3] or top
if type(left) == "table" then
left = left.name
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end
local right = tiles[5] or left
if type(right) == "table" then
right = right.name
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end
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image = minetest.inventorycube(top, left, right)
else
image = item.inventory_image or item.tiles[1]
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end
minetest.add_particle({
pos = {x = pos.x, y = pos.y + 1.5, z = pos.z},
velocity = {x = 0, y = 1, z = 0},
acceleration = {x = 0, y = -4, z = 0},
expirationtime = 0.2,
size = 3,--math.random() + 0.5,
vertical = false,
texture = image,
})
end
end
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ent:on_punch(player)
item_drop.after_collect(ent, pos, player)
end
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-- opt_get_ent gets the object's luaentity if it can be collected
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local opt_get_ent
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if zero_velocity_mode then
function opt_get_ent(object)
if object:is_player()
or not vector.equals(object:get_velocity(), {x=0, y=0, z=0}) then
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return
end
local ent = object:get_luaentity()
if not ent
or ent.name ~= "__builtin:item"
or ent.itemstring == "" then
return
end
return ent
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end
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else
function opt_get_ent(object)
if object:is_player() then
return
end
local ent = object:get_luaentity()
if not ent
or ent.name ~= "__builtin:item"
or (ent.dropped_by and ent.age < pickup_age)
or ent.itemstring == "" then
return
end
return ent
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end
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end
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local afterflight
if magnet_mode then
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-- take item or reset velocity after flying a second
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function afterflight(object, inv, player)
-- TODO: test what happens if player left the game
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local ent = opt_get_ent(object)
if not ent then
return
end
local item = ItemStack(ent.itemstring)
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if inv
and inv:room_for_item("main", item)
and item_drop.can_pickup(ent, player) then
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collect_item(ent, object:get_pos(), player)
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else
-- the acceleration will be reset by the object's on_step
object:set_velocity({x=0,y=0,z=0})
ent.is_magnet_item = false
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end
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end
-- disable velocity and acceleration changes of items flying to players
minetest.after(0, function()
local ObjectRef
local blocked_methods = {"set_acceleration", "set_velocity",
"setacceleration", "setvelocity"}
local itemdef = minetest.registered_entities["__builtin:item"]
local old_on_step = itemdef.on_step
local function do_nothing() end
function itemdef.on_step(self, ...)
if not self.is_magnet_item then
return old_on_step(self, ...)
end
ObjectRef = ObjectRef or getmetatable(self.object)
local old_funcs = {}
for i = 1, #blocked_methods do
local method = blocked_methods[i]
old_funcs[method] = ObjectRef[method]
ObjectRef[method] = do_nothing
end
old_on_step(self, ...)
for i = 1, #blocked_methods do
local method = blocked_methods[i]
ObjectRef[method] = old_funcs[method]
end
end
end)
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end
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-- set keytype to the key name if possible
if keytype == "Use" then
keytype = "aux1"
elseif keytype == "Sneak" then
keytype = "sneak"
elseif keytype == "LeftAndRight" then -- LeftAndRight combination
keytype = 0
elseif keytype == "SneakAndRMB" then -- SneakAndRMB combination
keytype = 1
end
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-- tests if the player has the keys pressed to enable item picking
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local function has_keys_pressed(player)
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if not key_triggered then
return true
end
local control = player:get_player_control()
local keys_pressed
if keytype == 0 then -- LeftAndRight combination
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keys_pressed = control.left and control.right
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elseif keytype == 1 then -- SneakAndRMB combination
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keys_pressed = control.sneak and control.RMB
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else
keys_pressed = control[keytype]
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end
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return keys_pressed ~= key_invert
end
local function is_inside_map(pos)
local bound = 31000
return -bound < pos.x and pos.x < bound
and -bound < pos.y and pos.y < bound
and -bound < pos.z and pos.z < bound
end
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-- called for each player to possibly collect an item, returns true if so
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local function pickupfunc(player)
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if not has_keys_pressed(player)
or not minetest.get_player_privs(player:get_player_name()).interact
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or player:get_hp() <= 0 then
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return
end
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local pos = player:get_pos()
if not is_inside_map(pos) then
-- get_objects_inside_radius crashes for too far positions
return
end
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pos.y = pos.y+0.5
local inv = player:get_inventory()
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local objectlist = minetest.get_objects_inside_radius(pos,
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magnet_mode and magnet_radius or pickup_radius)
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for i = 1,#objectlist do
local object = objectlist[i]
local ent = opt_get_ent(object)
if ent
and item_drop.can_pickup(ent, player) then
local item = ItemStack(ent.itemstring)
if inv:room_for_item("main", item) then
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local flying_item
local pos2
if magnet_mode then
pos2 = object:get_pos()
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flying_item = vector.distance(pos, pos2) > pickup_radius
end
if not flying_item then
-- The item is near enough to pick it
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collect_item(ent, pos, player)
-- Collect one item at a time to avoid the loud pop
return true
end
-- The item is not too far a way but near enough to be
-- magnetised, make it fly to the player
local vel = vector.multiply(vector.subtract(pos, pos2), 3)
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vel.y = vel.y + 0.6
object:set_velocity(vel)
if not ent.is_magnet_item then
ent.object:set_acceleration({x=0, y=0, z=0})
ent.is_magnet_item = true
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minetest.after(magnet_time, afterflight,
object, inv, player)
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end
end
end
end
end
local function pickup_step()
local got_item
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local players = minetest.get_connected_players()
for i = 1,#players do
got_item = got_item or pickupfunc(players[i])
end
-- lower step if takeable item(s) were found
local time
if got_item then
time = 0.02
else
time = 0.2
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end
minetest.after(time, pickup_step)
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end
minetest.after(3.0, pickup_step)
end
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if legacy_setting_getbool("item_drop.enable_item_drop", "enable_item_drop", true)
and not minetest.settings:get_bool("creative_mode") then
-- Workaround to test if an item metadata (ItemStackMetaRef) is empty
local function itemmeta_is_empty(meta)
local t = meta:to_table()
for k, v in pairs(t) do
if k ~= "fields" then
return false
end
assert(type(v) == "table")
if next(v) ~= nil then
return false
end
end
return true
end
-- Tests if the item has special information such as metadata
local function can_split_item(item)
return item:get_wear() == 0 and itemmeta_is_empty(item:get_meta())
end
local function spawn_items(pos, items_to_spawn)
for i = 1,#items_to_spawn do
local obj = minetest.add_item(pos, items_to_spawn[i])
if not obj then
error("Couldn't spawn item " .. name .. ", drops: "
.. dump(drops))
end
local vel = obj:get_velocity()
local x = math.random(-5, 4)
if x >= 0 then
x = x+1
end
vel.x = 1 / x
local z = math.random(-5, 4)
if z >= 0 then
z = z+1
end
vel.z = 1 / z
obj:set_velocity(vel)
end
end
local old_handle_node_drops = minetest.handle_node_drops
function minetest.handle_node_drops(pos, drops, player)
if player.is_fake_player then
-- Node Breaker or similar machines should receive items in the
-- inventory
return old_handle_node_drops(pos, drops, player)
end
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for i = 1,#drops do
local item = drops[i]
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if type(item) == "string" then
-- The string is not necessarily only the item name,
-- so always convert it to ItemStack
item = ItemStack(item)
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end
local count = item:get_count()
local name = item:get_name()
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-- Sometimes nothing should be dropped
if name == ""
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or not minetest.registered_items[name] then
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count = 0
end
if count > 0 then
-- Split items if possible
local items_to_spawn = {item}
if can_split_item(item) then
for i = 1,count do
items_to_spawn[i] = name
end
end
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spawn_items(pos, items_to_spawn)
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end
end
end
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end
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local time = (minetest.get_us_time() - load_time_start) / 1000000
local msg = "[item_drop] loaded after ca. " .. time .. " seconds."
if time > 0.01 then
print(msg)
else
minetest.log("info", msg)
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end