MineClone2/mods/ENTITIES/mcl_item_entity/init.lua

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--basic settings
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local item_drop_settings = {} --settings table
item_drop_settings.age = 1.0 --how old a dropped item (_insta_collect==false) has to be before collecting
item_drop_settings.radius_magnet = 2.0 --radius of item magnet. MUST BE LARGER THAN radius_collect!
item_drop_settings.radius_collect = 0.2 --radius of collection
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item_drop_settings.player_collect_height = 1.0 --added to their pos y value
item_drop_settings.collection_safety = false --do this to prevent items from flying away on laggy servers
item_drop_settings.random_item_velocity = true --this sets random item velocity if velocity is 0
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item_drop_settings.drop_single_item = false --if true, the drop control drops 1 item instead of the entire stack, and sneak+drop drops the stack
-- drop_single_item is disabled by default because it is annoying to throw away items from the intentory screen
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item_drop_settings.magnet_time = 0.75 -- how many seconds an item follows the player before giving up
local get_gravity = function()
return tonumber(minetest.settings:get("movement_gravity")) or 9.81
end
local check_pickup_achievements = function(object, player)
local itemname = ItemStack(object:get_luaentity().itemstring):get_name()
if minetest.get_item_group(itemname, "tree") ~= 0 then
awards.unlock(player:get_player_name(), "mcl:mineWood")
elseif itemname == "mcl_mobitems:blaze_rod" then
awards.unlock(player:get_player_name(), "mcl:blazeRod")
elseif itemname == "mcl_mobitems:leather" then
awards.unlock(player:get_player_name(), "mcl:killCow")
elseif itemname == "mcl_core:diamond" then
awards.unlock(player:get_player_name(), "mcl:diamonds")
end
end
local enable_physics = function(object, luaentity, ignore_check)
if luaentity.physical_state == false or ignore_check == true then
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luaentity.physical_state = true
object:set_properties({
physical = true
})
object:set_velocity({x=0,y=0,z=0})
object:set_acceleration({x=0,y=-get_gravity(),z=0})
end
end
local disable_physics = function(object, luaentity, ignore_check, reset_movement)
if luaentity.physical_state == true or ignore_check == true then
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luaentity.physical_state = false
object:set_properties({
physical = false
})
if reset_movement ~= false then
object:set_velocity({x=0,y=0,z=0})
object:set_acceleration({x=0,y=0,z=0})
end
end
end
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minetest.register_globalstep(function(dtime)
for _,player in ipairs(minetest.get_connected_players()) do
if player:get_hp() > 0 or not minetest.settings:get_bool("enable_damage") then
local pos = player:getpos()
local inv = player:get_inventory()
local checkpos = {x=pos.x,y=pos.y + item_drop_settings.player_collect_height,z=pos.z}
--magnet and collection
for _,object in ipairs(minetest.get_objects_inside_radius(checkpos, item_drop_settings.radius_magnet)) do
if not object:is_player() and object:get_luaentity() and object:get_luaentity().name == "__builtin:item" and object:get_luaentity()._magnet_timer and (object:get_luaentity()._insta_collect or (object:get_luaentity().age > item_drop_settings.age)) then
object:get_luaentity()._magnet_timer = object:get_luaentity()._magnet_timer + dtime
local collected = false
if object:get_luaentity()._magnet_timer >= 0 and object:get_luaentity()._magnet_timer < item_drop_settings.magnet_time and inv and inv:room_for_item("main", ItemStack(object:get_luaentity().itemstring)) then
-- Collection
if vector.distance(checkpos, object:getpos()) <= item_drop_settings.radius_collect and not object:get_luaentity()._removed then
-- Ignore if itemstring is not set yet
if object:get_luaentity().itemstring ~= "" then
inv:add_item("main", ItemStack(object:get_luaentity().itemstring))
minetest.sound_play("item_drop_pickup", {
pos = pos,
max_hear_distance = 16,
gain = 1.0,
})
check_pickup_achievements(object, player)
-- Destroy entity
-- This just prevents this section to be run again because object:remove() doesn't remove the item immediately.
object:get_luaentity()._removed = true
object:remove()
collected = true
end
-- Magnet
else
object:get_luaentity()._magnet_active = true
object:get_luaentity()._collector_timer = 0
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-- Move object to player
disable_physics(object, object:get_luaentity())
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local opos = object:getpos()
local vec = vector.subtract(checkpos, opos)
vec = vector.add(opos, vector.divide(vec, 2))
object:moveto(vec)
--fix eternally falling items
minetest.after(0, function(object)
local lua = object:get_luaentity()
if lua then
object:setacceleration({x=0, y=0, z=0})
end
end, object)
--this is a safety to prevent items flying away on laggy servers
if item_drop_settings.collection_safety == true then
if object:get_luaentity().init ~= true then
object:get_luaentity().init = true
minetest.after(1, function(args)
local playername = args[1]
local player = minetest.get_player_by_name(playername)
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local object = args[2]
local lua = object:get_luaentity()
if player == nil or not player:is_player() or object == nil or lua == nil or lua.itemstring == nil then
return
end
if inv:room_for_item("main", ItemStack(object:get_luaentity().itemstring)) then
inv:add_item("main", ItemStack(object:get_luaentity().itemstring))
if not object:get_luaentity()._removed then
minetest.sound_play("item_drop_pickup", {
pos = pos,
max_hear_distance = 16,
gain = 1.0,
})
end
check_pickup_achievements(object, player)
object:get_luaentity()._removed = true
object:remove()
else
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enable_physics(object, object:get_luaentity())
end
end, {player:get_player_name(), object})
end
end
end
end
if not collected then
if object:get_luaentity()._magnet_timer > 1 then
object:get_luaentity()._magnet_timer = -item_drop_settings.magnet_time
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object:get_luaentity()._magnet_active = false
elseif object:get_luaentity()._magnet_timer < 0 then
object:get_luaentity()._magnet_timer = object:get_luaentity()._magnet_timer + dtime
end
end
end
end
end
end
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end)
local minigroups = { "shearsy", "swordy", "shearsy_wool", "swordy_cobweb" }
local basegroups = { "pickaxey", "axey", "shovely" }
local materials = { "wood", "gold", "stone", "iron", "diamond" }
-- Checks if the given node would drop its useful drop if dug by a tool
-- with the given tool capabilities. Returns true if it will yield its useful
-- drop, false otherwise.
local check_can_drop = function(node_name, tool_capabilities)
local handy = minetest.get_item_group(node_name, "handy")
local dig_immediate = minetest.get_item_group(node_name, "dig_immediate")
if handy == 1 or dig_immediate == 2 or dig_immediate == 3 then
return true
else
local toolgroupcaps
if tool_capabilities then
toolgroupcaps = tool_capabilities.groupcaps
else
return false
end
-- Compare node groups with tool capabilities
for m=1, #minigroups do
local minigroup = minigroups[m]
local g = minetest.get_item_group(node_name, minigroup)
if g ~= 0 then
local plus = minigroup .. "_dig"
if toolgroupcaps[plus] then
return true
end
end
end
for b=1, #basegroups do
local basegroup = basegroups[b]
local g = minetest.get_item_group(node_name, basegroup)
if g ~= 0 then
for m=g, #materials do
local plus = basegroup .. "_dig_"..materials[m]
if toolgroupcaps[plus] then
return true
end
end
end
end
return false
end
end
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function minetest.handle_node_drops(pos, drops, digger)
-- NOTE: This function override allows digger to be nil.
-- This means there is no digger. This is a special case which allows this function to be called
-- by hand. Creative Mode is intentionally ignored in this case.
local doTileDrops = minetest.settings:get_bool("mcl_doTileDrops") or true
if (digger ~= nil and minetest.settings:get_bool("creative_mode")) or doTileDrops == false then
return
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end
-- Check if node will yield its useful drop by the digger's tool
local dug_node = minetest.get_node(pos)
local toolcaps
if digger ~= nil then
local tool = digger:get_wielded_item()
toolcaps = tool:get_tool_capabilities()
if not check_can_drop(dug_node.name, toolcaps) then
return
end
end
--[[ Special node drops when dug by shears by reading _mcl_shears_drop
from the node definition.
Definition of _mcl_shears_drop:
* true: Drop itself when dug by shears
* table: Drop every itemstring in this table when dub by shears
]]
local nodedef = minetest.registered_nodes[dug_node.name]
if toolcaps ~= nil and toolcaps.groupcaps and toolcaps.groupcaps.shearsy_dig and nodedef._mcl_shears_drop then
if nodedef._mcl_shears_drop == true then
drops = { dug_node.name }
else
drops = nodedef._mcl_shears_drop
end
end
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for _,item in ipairs(drops) do
local count, name
if type(item) == "string" then
count = 1
name = item
else
count = item:get_count()
name = item:get_name()
end
for i=1,count do
local obj = core.add_item(pos, name)
if obj ~= nil then
local x = math.random(1, 5)
if math.random(1,2) == 1 then
x = -x
end
local z = math.random(1, 5)
if math.random(1,2) == 1 then
z = -z
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end
obj:setvelocity({x=1/x, y=obj:getvelocity().y, z=1/z})
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end
end
end
end
-- Drop single items by default
function minetest.item_drop(itemstack, dropper, pos)
if dropper and dropper:is_player() then
local v = dropper:get_look_dir()
local p = {x=pos.x, y=pos.y+1.2, z=pos.z}
local cs = itemstack:get_count()
if dropper:get_player_control().sneak then
cs = 1
end
local item = itemstack:take_item(cs)
local obj = core.add_item(p, item)
if obj then
v.x = v.x*4
v.y = v.y*4 + 2
v.z = v.z*4
obj:setvelocity(v)
-- Force collection delay
obj:get_luaentity()._insta_collect = false
return itemstack
end
end
end
--modify builtin:item
local time_to_live = tonumber(core.setting_get("item_entity_ttl"))
if not time_to_live then
time_to_live = 300
end
core.register_entity(":__builtin:item", {
initial_properties = {
hp_max = 1,
physical = true,
collide_with_objects = false,
collisionbox = {-0.3, -0.3, -0.3, 0.3, 0.3, 0.3},
visual = "wielditem",
visual_size = {x = 0.4, y = 0.4},
textures = {""},
spritediv = {x = 1, y = 1},
initial_sprite_basepos = {x = 0, y = 0},
is_visible = false,
infotext = "",
},
-- Itemstring of dropped item. The empty string is used when the item is not yet initialized yet.
-- The itemstring MUST be set immediately to a non-empty string after creating the entity.
-- The hand is NOT permitted as dropped item. ;-)
-- Item entities will be deleted if they still have an empty itemstring on their first on_step tick.
itemstring = '',
-- If true, item will fall
physical_state = true,
-- If item entity is currently flowing in water
_flowing = false,
-- Number of seconds this item entity has existed so far
age = 0,
set_item = function(self, itemstring)
self.itemstring = itemstring
if self.itemstring == "" then
-- item not yet known
return
end
local stack = ItemStack(itemstring)
local count = stack:get_count()
local max_count = stack:get_stack_max()
if count > max_count then
count = max_count
self.itemstring = stack:get_name().." "..max_count
end
local s = 0.2 + 0.1 * (count / max_count)
local c = s
local itemtable = stack:to_table()
local itemname = nil
local description = ""
if itemtable then
itemname = stack:to_table().name
end
local item_texture = nil
local item_type = ""
if core.registered_items[itemname] then
item_texture = core.registered_items[itemname].inventory_image
item_type = core.registered_items[itemname].type
description = core.registered_items[itemname].description
end
local prop = {
is_visible = true,
visual = "wielditem",
textures = {itemname},
visual_size = {x = s, y = s},
collisionbox = {-c, -c, -c, c, c, c},
automatic_rotate = math.pi * 0.5,
infotext = description,
}
self.object:set_properties(prop)
if item_drop_settings.random_item_velocity == true then
minetest.after(0, function(self)
if not self or not self.object or not self.object:get_luaentity() then
return
end
local vel = self.object:getvelocity()
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if vel and vel.x == 0 and vel.z == 0 then
local x = math.random(1, 5)
if math.random(1,2) == 1 then
x = -x
end
local z = math.random(1, 5)
if math.random(1,2) == 1 then
z = -z
end
local y = math.random(2,4)
self.object:setvelocity({x=1/x, y=y, z=1/z})
end
end, self)
end
end,
get_staticdata = function(self)
return core.serialize({
itemstring = self.itemstring,
always_collect = self.always_collect,
age = self.age,
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_insta_collect = self._insta_collect,
_flowing = self._flowing,
_removed = self._removed,
})
end,
on_activate = function(self, staticdata, dtime_s)
if string.sub(staticdata, 1, string.len("return")) == "return" then
local data = core.deserialize(staticdata)
if data and type(data) == "table" then
self.itemstring = data.itemstring
self.always_collect = data.always_collect
if data.age then
self.age = data.age + dtime_s
else
self.age = dtime_s
end
--remember collection data
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-- If true, can collect item without delay
self._insta_collect = data._insta_collect
self._flowing = data._flowing
self._removed = data._removed
end
else
self.itemstring = staticdata
end
if self._removed then
self._removed = true
self.object:remove()
return
end
if self._insta_collect == nil then
-- Intentionally default, since delayed collection is rare
self._insta_collect = true
end
if self._flowing == nil then
self._flowing = false
end
self._magnet_timer = 0
self._magnet_active = false
-- How long ago the last possible collector was detected. nil = none in this session
self._collector_timer = nil
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-- Used to apply additional force
self._force = nil
self._forcestart = nil
self._forcetimer = 0
self.object:set_armor_groups({immortal = 1})
self.object:setvelocity({x = 0, y = 2, z = 0})
self.object:setacceleration({x = 0, y = -get_gravity(), z = 0})
self:set_item(self.itemstring)
end,
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try_merge_with = function(self, own_stack, object, entity)
if self.age == entity.age or entity._removed then
-- Can not merge with itself and remove entity
return false
end
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local stack = ItemStack(entity.itemstring)
local name = stack:get_name()
if own_stack:get_name() ~= name or
own_stack:get_meta() ~= stack:get_meta() or
own_stack:get_wear() ~= stack:get_wear() or
own_stack:get_free_space() == 0 then
-- Can not merge different or full stack
return false
end
local count = own_stack:get_count()
local total_count = stack:get_count() + count
local max_count = stack:get_stack_max()
if total_count > max_count then
return false
end
-- Merge the remote stack into this one
local pos = object:get_pos()
pos.y = pos.y + ((total_count - count) / max_count) * 0.15
self.object:move_to(pos)
self.age = 0 -- Handle as new entity
own_stack:set_count(total_count)
self:set_item(own_stack:to_string())
entity._removed = true
object:remove()
return true
end,
on_step = function(self, dtime)
if self._removed then
return
end
self.age = self.age + dtime
if self._collector_timer ~= nil then
self._collector_timer = self._collector_timer + dtime
end
if time_to_live > 0 and self.age > time_to_live then
self._removed = true
self.object:remove()
return
end
-- Delete corrupted item entities. The itemstring MUST be non-empty on its first step,
-- otherwise there might have some data corruption.
if self.itemstring == "" then
minetest.log("warning", "Item entity with empty itemstring found at "..minetest.pos_to_string(self.object:getpos()).. "! Deleting it now.")
self._removed = true
self.object:remove()
end
local p = self.object:getpos()
local node = core.get_node_or_nil(p)
local in_unloaded = (node == nil)
-- If no collector was found for a long enough time, declare the magnet as disabled
if self._magnet_active and (self._collector_timer == nil or (self._collector_timer > item_drop_settings.magnet_time)) then
self._magnet_active = false
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enable_physics(self.object, self)
return
end
if in_unloaded then
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-- Don't infinetly fall into unloaded map
disable_physics(self.object, self)
return
end
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-- Destroy item in lava or special nodes
local nn = node.name
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local def = minetest.registered_nodes[nn]
if (def and def.groups and (def.groups.lava or def.groups.destroys_items == 1)) then
-- Special effect for lava
if def.groups.lava then
minetest.sound_play("builtin_item_lava", {pos = self.object:getpos(), gain = 0.5})
end
self._removed = true
self.object:remove()
return
end
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-- Push item out when stuck inside solid opaque node
if def and def.walkable and def.groups and def.groups.opaque == 1 then
local shootdir
local cx = p.x % 1
local cz = p.z % 1
local order = {}
-- First prepare the order in which the 4 sides are to be checked.
-- 1st: closest
-- 2nd: other direction
-- 3rd and 4th: other axis
local cxcz = function(o, cw, one, zero)
if cw > 0 then
table.insert(o, { [one]=1, y=0, [zero]=0 })
table.insert(o, { [one]=-1, y=0, [zero]=0 })
else
table.insert(o, { [one]=-1, y=0, [zero]=0 })
table.insert(o, { [one]=1, y=0, [zero]=0 })
end
return o
end
if math.abs(cx) > math.abs(cz) then
order = cxcz(order, cx, "x", "z")
order = cxcz(order, cz, "z", "x")
else
order = cxcz(order, cz, "z", "x")
order = cxcz(order, cx, "x", "z")
end
-- Check which one of the 4 sides is free
for o=1, #order do
local nn = minetest.get_node(vector.add(p, order[o])).name
local def = minetest.registered_nodes[nn]
if def and def.walkable == false and nn ~= "ignore" then
shootdir = order[o]
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break
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end
end
-- If none of the 4 sides is free, shoot upwards
if shootdir == nil then
shootdir = { x=0, y=1, z=0 }
local nn = minetest.get_node(vector.add(p, shootdir)).name
if nn == "ignore" then
-- Do not push into ignore
return
end
end
-- Set new item moving speed accordingly
local newv = vector.multiply(shootdir, 3)
self.object:setacceleration({x = 0, y = 0, z = 0})
self.object:setvelocity(newv)
disable_physics(self.object, self, false, false)
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if shootdir.y == 0 then
self._force = newv
p.x = math.floor(p.x)
p.y = math.floor(p.y)
p.z = math.floor(p.z)
self._forcestart = p
self._forcetimer = 1
end
return
end
-- This code is run after the entity got a push from above “push away” code.
-- It is responsible for making sure the entity is entirely outside the solid node
-- (with its full collision box), not just its center.
if self._forcetimer > 0 then
local cbox = self.object:get_properties().collisionbox
local ok = false
if self._force.x > 0 and (p.x > (self._forcestart.x + 0.5 + (cbox[4] - cbox[1])/2)) then ok = true
elseif self._force.x < 0 and (p.x < (self._forcestart.x + 0.5 - (cbox[4] - cbox[1])/2)) then ok = true
elseif self._force.z > 0 and (p.z > (self._forcestart.z + 0.5 + (cbox[6] - cbox[3])/2)) then ok = true
elseif self._force.z < 0 and (p.z < (self._forcestart.z + 0.5 - (cbox[6] - cbox[3])/2)) then ok = true end
-- Item was successfully forced out. No more pushing
if ok then
self._forcetimer = -1
self._force = nil
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enable_physics(self.object, self)
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else
self._forcetimer = self._forcetimer - dtime
end
return
elseif self._force then
self._force = nil
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enable_physics(self.object, self)
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return
end
-- Move item around on flowing liquids
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if def and def.liquidtype == "flowing" then
--[[ Get flowing direction (function call from flowlib), if there's a liquid.
NOTE: According to Qwertymine, flowlib.quickflow is only reliable for liquids with a flowing distance of 7.
Luckily, this is exactly what we need if we only care about water, which has this flowing distance. ]]
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local vec = flowlib.quick_flow(p, node)
-- Just to make sure we don't manipulate the speed for no reason
if vec.x ~= 0 or vec.y ~= 0 or vec.z ~= 0 then
-- Minecraft Wiki: Flowing speed is "about 1.39 meters per second"
local f = 1.39
-- Set new item moving speed into the direciton of the liquid
local newv = vector.multiply(vec, f)
self.object:setacceleration({x = 0, y = 0, z = 0})
self.object:setvelocity({x = newv.x, y = -0.22, z = newv.z})
self.physical_state = true
self._flowing = true
self.object:set_properties({
physical = true
})
return
end
elseif self._flowing == true then
-- Disable flowing physics if not on/in flowing liquid
self._flowing = false
enable_physics(self.object, self, true)
return
end
-- If node is not registered or node is walkably solid and resting on nodebox
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local nn = minetest.get_node({x=p.x, y=p.y-0.5, z=p.z}).name
local v = self.object:getvelocity()
if not core.registered_nodes[nn] or core.registered_nodes[nn].walkable and v.y == 0 then
if self.physical_state then
local own_stack = ItemStack(self.object:get_luaentity().itemstring)
-- Merge with close entities of the same item
for _, object in ipairs(core.get_objects_inside_radius(p, 0.8)) do
local obj = object:get_luaentity()
if obj and obj.name == "__builtin:item"
and obj.physical_state == false then
if self:try_merge_with(own_stack, object, obj) then
return
end
end
end
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disable_physics(self.object, self)
end
else
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if self._magnet_active == false then
enable_physics(self.object, self)
end
end
end,
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-- Note: on_punch intentionally left out. The player should *not* be able to collect items by punching
})
if minetest.settings:get_bool("log_mods") then
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minetest.log("action", "mcl_item_entity loaded")
end