write something there
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N-Nachtigal
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437
mods/item_drop/init.lua
Normal file
437
mods/item_drop/init.lua
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@ -0,0 +1,437 @@
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local load_time_start = minetest.get_us_time()
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-- Functions which can be overridden by mods
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item_drop = {
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-- This function is executed before picking up an item or making it fly to
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-- the player. If it does not return true, the item is ignored.
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-- It is also executed before collecting the item after it flew to
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-- the player and did not reach him/her for magnet_time seconds.
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can_pickup = function(entity, player)
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if entity.item_drop_picked then
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-- Ignore items where picking has already failed
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return false
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end
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return true
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end,
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-- before_collect and after_collect are executed before and after an item
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-- is collected by a player
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before_collect = function(entity, pos, player)
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end,
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after_collect = function(entity, pos, player)
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entity.item_drop_picked = true
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end,
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}
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local function legacy_setting_getbool(name_new, name_old, default)
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local v = minetest.settings:get_bool(name_new)
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if v == nil then
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v = minetest.settings:get_bool(name_new)
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end
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if default then
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return v ~= false
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end
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return v
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end
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local function legacy_setting_getnumber(name_new, name_old, default)
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return tonumber(minetest.settings:get(name_new))
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or tonumber(minetest.settings:get(name_old))
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or default
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end
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if legacy_setting_getbool("item_drop.enable_item_pickup",
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"enable_item_pickup", true) then
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local pickup_gain = legacy_setting_getnumber("item_drop.pickup_sound_gain",
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"item_pickup_gain", 0.0375)
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local pickup_particle =
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minetest.settings:get_bool("item_drop.pickup_particle", false)
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local pickup_radius = legacy_setting_getnumber("item_drop.pickup_radius",
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"item_pickup_radius", 1.5)
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local magnet_radius = tonumber(
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minetest.settings:get("item_drop.magnet_radius")) or -1
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local magnet_time = tonumber(
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minetest.settings:get("item_drop.magnet_time")) or 5.0
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local pickup_age = tonumber(
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minetest.settings:get("item_drop.pickup_age")) or 1
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local key_triggered = legacy_setting_getbool("item_drop.enable_pickup_key",
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"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
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if key_triggered then
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keytype = minetest.settings:get("item_drop.pickup_keytype") or
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minetest.settings:get("item_pickup_keytype") or "Use"
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-- disable pickup age if picking is explicitly enabled by the player
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if not key_invert then
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pickup_age = math.min(pickup_age, 0)
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end
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end
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local mouse_pickup = minetest.settings:get_bool(
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"item_drop.mouse_pickup") ~= false
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if not mouse_pickup then
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minetest.registered_entities["__builtin:item"].pointable = false
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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
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and zero_velocity_mode then
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error"zero velocity mode can't be used together with magnet mode"
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end
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-- tells whether an inventorycube should be shown as pickup_particle or not
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-- for known drawtypes
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local inventorycube_drawtypes = {
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normal = true,
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allfaces = true,
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allfaces_optional = true,
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glasslike = true,
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glasslike_framed = true,
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glasslike_framed_optional = true,
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liquid = true,
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flowingliquid = true,
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}
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-- Get an image string from a tile definition
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local function tile_to_image(tile, fallback_image)
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if not tile then
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return fallback_image
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end
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local tile_type = type(tile)
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if tile_type == "string" then
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return tile
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end
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assert(tile_type == "table", "Tile definition is not a string or table")
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local image = tile.name or tile.image
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assert(image, "Tile definition has no image file specified")
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if tile.color then
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local colorstr = minetest.colorspec_to_colorstring(tile.color)
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if colorstr then
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return image .. "^[multiply:" .. colorstr
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end
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end
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return image
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end
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-- adds the item to the inventory and removes the object
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local function collect_item(ent, pos, player)
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item_drop.before_collect(ent, pos, player)
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minetest.sound_play("item_drop_pickup", {
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pos = pos,
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gain = pickup_gain,
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pitch = 2.1 + math.random(-2250,2250) / 10000,
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}, true)
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if pickup_particle then
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local item = minetest.registered_nodes[
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ent.itemstring:gsub("(.*)%s.*$", "%1")]
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local image
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if item and item.tiles and item.tiles[1] then
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if inventorycube_drawtypes[item.drawtype] then
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local tiles = item.tiles
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-- color in the tile definition is handled by tile_to_image.
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-- color in the node definition is not yet supported here.
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local top = tile_to_image(tiles[1])
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local left = tile_to_image(tiles[3], top)
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local right = tile_to_image(tiles[5], left)
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image = minetest.inventorycube(top, left, right)
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else
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image = item.inventory_image or item.tiles[1]
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end
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minetest.add_particle({
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pos = {x = pos.x, y = pos.y + 1.5, z = pos.z},
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velocity = {x = 0, y = 1, z = 0},
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acceleration = {x = 0, y = -4, z = 0},
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expirationtime = 0.2,
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size = 3,--math.random() + 0.5,
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vertical = false,
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texture = image,
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})
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end
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end
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ent:on_punch(player)
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item_drop.after_collect(ent, pos, player)
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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
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function opt_get_ent(object)
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if object:is_player()
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or not vector.equals(object:get_velocity(), {x=0, y=0, z=0}) then
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return
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end
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local ent = object:get_luaentity()
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if not ent
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or ent.name ~= "__builtin:item"
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or ent.itemstring == "" then
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return
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end
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return ent
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end
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else
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function opt_get_ent(object)
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if object:is_player() then
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return
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end
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local ent = object:get_luaentity()
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if not ent
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or ent.name ~= "__builtin:item"
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or (ent.dropped_by and ent.age < pickup_age)
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or ent.itemstring == "" then
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return
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end
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return ent
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end
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end
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local afterflight
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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)
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-- TODO: test what happens if player left the game
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local ent = opt_get_ent(object)
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if not ent then
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return
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end
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local item = ItemStack(ent.itemstring)
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if inv
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and inv:room_for_item("main", item)
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and item_drop.can_pickup(ent, player) then
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collect_item(ent, object:get_pos(), player)
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else
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-- the acceleration will be reset by the object's on_step
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object:set_velocity({x=0,y=0,z=0})
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ent.is_magnet_item = false
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end
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end
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-- disable velocity and acceleration changes of items flying to players
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minetest.after(0, function()
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local ObjectRef
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local blocked_methods = {"set_acceleration", "set_velocity",
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"setacceleration", "setvelocity"}
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local itemdef = minetest.registered_entities["__builtin:item"]
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local old_on_step = itemdef.on_step
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local function do_nothing() end
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function itemdef.on_step(self, ...)
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if not self.is_magnet_item then
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return old_on_step(self, ...)
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end
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ObjectRef = ObjectRef or getmetatable(self.object)
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local old_funcs = {}
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for i = 1, #blocked_methods do
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local method = blocked_methods[i]
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old_funcs[method] = ObjectRef[method]
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ObjectRef[method] = do_nothing
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end
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old_on_step(self, ...)
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for i = 1, #blocked_methods do
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local method = blocked_methods[i]
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ObjectRef[method] = old_funcs[method]
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end
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end
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end)
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end
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-- set keytype to the key name if possible
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if keytype == "Use" then
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keytype = "aux1"
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elseif keytype == "Sneak" then
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keytype = "sneak"
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elseif keytype == "LeftAndRight" then -- LeftAndRight combination
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keytype = 0
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elseif keytype == "SneakAndRMB" then -- SneakAndRMB combination
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keytype = 1
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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
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return true
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end
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local control = player:get_player_control()
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local keys_pressed
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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
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keys_pressed = control[keytype]
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end
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return keys_pressed ~= key_invert
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end
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local function is_inside_map(pos)
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local bound = 31000
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return -bound < pos.x and pos.x < bound
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and -bound < pos.y and pos.y < bound
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and -bound < pos.z and pos.z < bound
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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)
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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
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end
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local pos = player:get_pos()
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if not is_inside_map(pos) then
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-- get_objects_inside_radius crashes for too far positions
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return
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end
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pos.y = pos.y+0.5
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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
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local object = objectlist[i]
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local ent = opt_get_ent(object)
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if ent
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and item_drop.can_pickup(ent, player) then
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local item = ItemStack(ent.itemstring)
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if inv:room_for_item("main", item) then
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local flying_item
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local pos2
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if magnet_mode then
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pos2 = object:get_pos()
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flying_item = vector.distance(pos, pos2) > pickup_radius
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end
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if not flying_item then
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-- The item is near enough to pick it
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collect_item(ent, pos, player)
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-- Collect one item at a time to avoid the loud pop
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return true
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end
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-- The item is not too far a way but near enough to be
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-- magnetised, make it fly to the player
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local vel = vector.multiply(vector.subtract(pos, pos2), 3)
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vel.y = vel.y + 0.6
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object:set_velocity(vel)
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if not ent.is_magnet_item then
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ent.object:set_acceleration({x=0, y=0, z=0})
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ent.is_magnet_item = true
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minetest.after(magnet_time, afterflight,
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object, inv, player)
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end
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end
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end
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end
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end
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local function pickup_step()
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local got_item
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local players = minetest.get_connected_players()
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for i = 1,#players do
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got_item = got_item or pickupfunc(players[i])
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end
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-- lower step if takeable item(s) were found
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local time
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if got_item then
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time = 0.02
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else
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time = 0.2
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end
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minetest.after(time, pickup_step)
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end
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minetest.after(3.0, pickup_step)
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end
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if legacy_setting_getbool("item_drop.enable_item_drop", "enable_item_drop", true)
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and not minetest.settings:get_bool("creative_mode") then
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-- Workaround to test if an item metadata (ItemStackMetaRef) is empty
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local function itemmeta_is_empty(meta)
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local t = meta:to_table()
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for k, v in pairs(t) do
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if k ~= "fields" then
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return false
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end
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assert(type(v) == "table")
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if next(v) ~= nil then
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return false
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end
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end
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return true
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end
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-- Tests if the item has special information such as metadata
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local function can_split_item(item)
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return item:get_wear() == 0 and itemmeta_is_empty(item:get_meta())
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end
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local function spawn_items(pos, items_to_spawn)
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for i = 1,#items_to_spawn do
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local obj = minetest.add_item(pos, items_to_spawn[i])
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if not obj then
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error("Couldn't spawn item " .. name .. ", drops: "
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.. dump(drops))
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end
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local vel = obj:get_velocity()
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local x = math.random(-5, 4)
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if x >= 0 then
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x = x+1
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end
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vel.x = 1 / x
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local z = math.random(-5, 4)
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if z >= 0 then
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z = z+1
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end
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vel.z = 1 / z
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obj:set_velocity(vel)
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end
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end
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local old_handle_node_drops = minetest.handle_node_drops
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function minetest.handle_node_drops(pos, drops, player)
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if not player or player.is_fake_player then
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-- Node Breaker or similar machines should receive items in the
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-- inventory
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return old_handle_node_drops(pos, drops, player)
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end
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for i = 1,#drops do
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local item = drops[i]
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if type(item) == "string" then
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-- The string is not necessarily only the item name,
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-- so always convert it to ItemStack
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item = ItemStack(item)
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end
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local count = item:get_count()
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local name = item:get_name()
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-- Sometimes nothing should be dropped
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if name == ""
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or not minetest.registered_items[name] then
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count = 0
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end
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if count > 0 then
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-- Split items if possible
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local items_to_spawn = {item}
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if can_split_item(item) then
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for i = 1,count do
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items_to_spawn[i] = name
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end
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end
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spawn_items(pos, items_to_spawn)
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end
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end
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end
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end
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local time = (minetest.get_us_time() - load_time_start) / 1000000
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local msg = "[item_drop] loaded after ca. " .. time .. " seconds."
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if time > 0.01 then
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print(msg)
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else
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minetest.log("info", msg)
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end
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