minetest/builtin/game/item.lua
Dániel Juhász 00123ee04d Fixes for colorwallmounted and colorfacedir nodes
Correct node placement prediction for attached colorwallmounted nodes.
Correct placement direction for colorfacedir and colorwallmounted nodes.
Correct detatch mechanism for attached colorwallmounted nodes.
2017-02-18 22:47:24 +00:00

666 lines
18 KiB
Lua

-- Minetest: builtin/item.lua
local builtin_shared = ...
local function copy_pointed_thing(pointed_thing)
return {
type = pointed_thing.type,
above = vector.new(pointed_thing.above),
under = vector.new(pointed_thing.under),
ref = pointed_thing.ref,
}
end
--
-- Item definition helpers
--
function core.inventorycube(img1, img2, img3)
img2 = img2 or img1
img3 = img3 or img1
return "[inventorycube"
.. "{" .. img1:gsub("%^", "&")
.. "{" .. img2:gsub("%^", "&")
.. "{" .. img3:gsub("%^", "&")
end
function core.get_pointed_thing_position(pointed_thing, above)
if pointed_thing.type == "node" then
if above then
-- The position where a node would be placed
return pointed_thing.above
end
-- The position where a node would be dug
return pointed_thing.under
elseif pointed_thing.type == "object" then
return pointed_thing.ref and pointed_thing.ref:getpos()
end
end
function core.dir_to_facedir(dir, is6d)
--account for y if requested
if is6d and math.abs(dir.y) > math.abs(dir.x) and math.abs(dir.y) > math.abs(dir.z) then
--from above
if dir.y < 0 then
if math.abs(dir.x) > math.abs(dir.z) then
if dir.x < 0 then
return 19
else
return 13
end
else
if dir.z < 0 then
return 10
else
return 4
end
end
--from below
else
if math.abs(dir.x) > math.abs(dir.z) then
if dir.x < 0 then
return 15
else
return 17
end
else
if dir.z < 0 then
return 6
else
return 8
end
end
end
--otherwise, place horizontally
elseif math.abs(dir.x) > math.abs(dir.z) then
if dir.x < 0 then
return 3
else
return 1
end
else
if dir.z < 0 then
return 2
else
return 0
end
end
end
-- Table of possible dirs
local facedir_to_dir = {
{x= 0, y=0, z= 1},
{x= 1, y=0, z= 0},
{x= 0, y=0, z=-1},
{x=-1, y=0, z= 0},
{x= 0, y=-1, z= 0},
{x= 0, y=1, z= 0},
}
-- Mapping from facedir value to index in facedir_to_dir.
local facedir_to_dir_map = {
[0]=1, 2, 3, 4,
5, 2, 6, 4,
6, 2, 5, 4,
1, 5, 3, 6,
1, 6, 3, 5,
1, 4, 3, 2,
}
function core.facedir_to_dir(facedir)
return facedir_to_dir[facedir_to_dir_map[facedir % 32]]
end
function core.dir_to_wallmounted(dir)
if math.abs(dir.y) > math.max(math.abs(dir.x), math.abs(dir.z)) then
if dir.y < 0 then
return 1
else
return 0
end
elseif math.abs(dir.x) > math.abs(dir.z) then
if dir.x < 0 then
return 3
else
return 2
end
else
if dir.z < 0 then
return 5
else
return 4
end
end
end
-- table of dirs in wallmounted order
local wallmounted_to_dir = {
[0] = {x = 0, y = 1, z = 0},
{x = 0, y = -1, z = 0},
{x = 1, y = 0, z = 0},
{x = -1, y = 0, z = 0},
{x = 0, y = 0, z = 1},
{x = 0, y = 0, z = -1},
}
function core.wallmounted_to_dir(wallmounted)
return wallmounted_to_dir[wallmounted % 8]
end
function core.dir_to_yaw(dir)
return -math.atan2(dir.x, dir.z)
end
function core.yaw_to_dir(yaw)
return {x = -math.sin(yaw), y = 0, z = math.cos(yaw)}
end
function core.get_node_drops(nodename, toolname)
local drop = ItemStack({name=nodename}):get_definition().drop
if drop == nil then
-- default drop
return {nodename}
elseif type(drop) == "string" then
-- itemstring drop
return {drop}
elseif drop.items == nil then
-- drop = {} to disable default drop
return {}
end
-- Extended drop table
local got_items = {}
local got_count = 0
local _, item, tool
for _, item in ipairs(drop.items) do
local good_rarity = true
local good_tool = true
if item.rarity ~= nil then
good_rarity = item.rarity < 1 or math.random(item.rarity) == 1
end
if item.tools ~= nil then
good_tool = false
for _, tool in ipairs(item.tools) do
if tool:sub(1, 1) == '~' then
good_tool = toolname:find(tool:sub(2)) ~= nil
else
good_tool = toolname == tool
end
if good_tool then
break
end
end
end
if good_rarity and good_tool then
got_count = got_count + 1
for _, add_item in ipairs(item.items) do
got_items[#got_items+1] = add_item
end
if drop.max_items ~= nil and got_count == drop.max_items then
break
end
end
end
return got_items
end
function core.item_place_node(itemstack, placer, pointed_thing, param2)
local item = itemstack:peek_item()
local def = itemstack:get_definition()
if def.type ~= "node" or pointed_thing.type ~= "node" then
return itemstack, false
end
local under = pointed_thing.under
local oldnode_under = core.get_node_or_nil(under)
local above = pointed_thing.above
local oldnode_above = core.get_node_or_nil(above)
if not oldnode_under or not oldnode_above then
core.log("info", placer:get_player_name() .. " tried to place"
.. " node in unloaded position " .. core.pos_to_string(above))
return itemstack, false
end
local olddef_under = ItemStack({name=oldnode_under.name}):get_definition()
olddef_under = olddef_under or core.nodedef_default
local olddef_above = ItemStack({name=oldnode_above.name}):get_definition()
olddef_above = olddef_above or core.nodedef_default
if not olddef_above.buildable_to and not olddef_under.buildable_to then
core.log("info", placer:get_player_name() .. " tried to place"
.. " node in invalid position " .. core.pos_to_string(above)
.. ", replacing " .. oldnode_above.name)
return itemstack, false
end
-- Place above pointed node
local place_to = {x = above.x, y = above.y, z = above.z}
-- If node under is buildable_to, place into it instead (eg. snow)
if olddef_under.buildable_to then
core.log("info", "node under is buildable to")
place_to = {x = under.x, y = under.y, z = under.z}
end
if core.is_protected(place_to, placer:get_player_name()) and
not minetest.check_player_privs(placer, "protection_bypass") then
core.log("action", placer:get_player_name()
.. " tried to place " .. def.name
.. " at protected position "
.. core.pos_to_string(place_to))
core.record_protection_violation(place_to, placer:get_player_name())
return itemstack
end
core.log("action", placer:get_player_name() .. " places node "
.. def.name .. " at " .. core.pos_to_string(place_to))
local oldnode = core.get_node(place_to)
local newnode = {name = def.name, param1 = 0, param2 = param2}
-- Calculate direction for wall mounted stuff like torches and signs
if def.place_param2 ~= nil then
newnode.param2 = def.place_param2
elseif (def.paramtype2 == 'wallmounted' or
def.paramtype2 == 'colorwallmounted') and not param2 then
local dir = {
x = under.x - above.x,
y = under.y - above.y,
z = under.z - above.z
}
newnode.param2 = core.dir_to_wallmounted(dir)
-- Calculate the direction for furnaces and chests and stuff
elseif (def.paramtype2 == 'facedir' or
def.paramtype2 == 'colorfacedir') and not param2 then
local placer_pos = placer:getpos()
if placer_pos then
local dir = {
x = above.x - placer_pos.x,
y = above.y - placer_pos.y,
z = above.z - placer_pos.z
}
newnode.param2 = core.dir_to_facedir(dir)
core.log("action", "facedir: " .. newnode.param2)
end
end
-- Check if the node is attached and if it can be placed there
if core.get_item_group(def.name, "attached_node") ~= 0 and
not builtin_shared.check_attached_node(place_to, newnode) then
core.log("action", "attached node " .. def.name ..
" can not be placed at " .. core.pos_to_string(place_to))
return itemstack, false
end
-- Add node and update
core.add_node(place_to, newnode)
local take_item = true
-- Run callback
if def.after_place_node then
-- Deepcopy place_to and pointed_thing because callback can modify it
local place_to_copy = {x=place_to.x, y=place_to.y, z=place_to.z}
local pointed_thing_copy = copy_pointed_thing(pointed_thing)
if def.after_place_node(place_to_copy, placer, itemstack,
pointed_thing_copy) then
take_item = false
end
end
-- Run script hook
local _, callback
for _, callback in ipairs(core.registered_on_placenodes) do
-- Deepcopy pos, node and pointed_thing because callback can modify them
local place_to_copy = {x=place_to.x, y=place_to.y, z=place_to.z}
local newnode_copy = {name=newnode.name, param1=newnode.param1, param2=newnode.param2}
local oldnode_copy = {name=oldnode.name, param1=oldnode.param1, param2=oldnode.param2}
local pointed_thing_copy = copy_pointed_thing(pointed_thing)
if callback(place_to_copy, newnode_copy, placer, oldnode_copy, itemstack, pointed_thing_copy) then
take_item = false
end
end
if take_item then
itemstack:take_item()
end
return itemstack, true
end
function core.item_place_object(itemstack, placer, pointed_thing)
local pos = core.get_pointed_thing_position(pointed_thing, true)
if pos ~= nil then
local item = itemstack:take_item()
core.add_item(pos, item)
end
return itemstack
end
function core.item_place(itemstack, placer, pointed_thing, param2)
-- Call on_rightclick if the pointed node defines it
if pointed_thing.type == "node" and placer and
not placer:get_player_control().sneak then
local n = core.get_node(pointed_thing.under)
local nn = n.name
if core.registered_nodes[nn] and core.registered_nodes[nn].on_rightclick then
return core.registered_nodes[nn].on_rightclick(pointed_thing.under, n,
placer, itemstack, pointed_thing) or itemstack, false
end
end
if itemstack:get_definition().type == "node" then
return core.item_place_node(itemstack, placer, pointed_thing, param2)
end
return itemstack
end
function core.item_secondary_use(itemstack, placer)
return itemstack
end
function core.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*2
v.y = v.y*2 + 2
v.z = v.z*2
obj:setvelocity(v)
obj:get_luaentity().dropped_by = dropper:get_player_name()
return itemstack
end
else
if core.add_item(pos, itemstack) then
return itemstack
end
end
-- If we reach this, adding the object to the
-- environment failed
end
function core.do_item_eat(hp_change, replace_with_item, itemstack, user, pointed_thing)
for _, callback in pairs(core.registered_on_item_eats) do
local result = callback(hp_change, replace_with_item, itemstack, user, pointed_thing)
if result then
return result
end
end
if itemstack:take_item() ~= nil then
user:set_hp(user:get_hp() + hp_change)
if replace_with_item then
if itemstack:is_empty() then
itemstack:add_item(replace_with_item)
else
local inv = user:get_inventory()
if inv:room_for_item("main", {name=replace_with_item}) then
inv:add_item("main", replace_with_item)
else
local pos = user:getpos()
pos.y = math.floor(pos.y + 0.5)
core.add_item(pos, replace_with_item)
end
end
end
end
return itemstack
end
function core.item_eat(hp_change, replace_with_item)
return function(itemstack, user, pointed_thing) -- closure
return core.do_item_eat(hp_change, replace_with_item, itemstack, user, pointed_thing)
end
end
function core.node_punch(pos, node, puncher, pointed_thing)
-- Run script hook
for _, callback in ipairs(core.registered_on_punchnodes) do
-- Copy pos and node because callback can modify them
local pos_copy = vector.new(pos)
local node_copy = {name=node.name, param1=node.param1, param2=node.param2}
local pointed_thing_copy = pointed_thing and copy_pointed_thing(pointed_thing) or nil
callback(pos_copy, node_copy, puncher, pointed_thing_copy)
end
end
function core.handle_node_drops(pos, drops, digger)
-- Add dropped items to object's inventory
if digger:get_inventory() then
local _, dropped_item
for _, dropped_item in ipairs(drops) do
local left = digger:get_inventory():add_item("main", dropped_item)
if not left:is_empty() then
local p = {
x = pos.x + math.random()/2-0.25,
y = pos.y + math.random()/2-0.25,
z = pos.z + math.random()/2-0.25,
}
core.add_item(p, left)
end
end
end
end
function core.node_dig(pos, node, digger)
local def = ItemStack({name=node.name}):get_definition()
if not def.diggable or (def.can_dig and not def.can_dig(pos,digger)) then
core.log("info", digger:get_player_name() .. " tried to dig "
.. node.name .. " which is not diggable "
.. core.pos_to_string(pos))
return
end
if core.is_protected(pos, digger:get_player_name()) and
not minetest.check_player_privs(digger, "protection_bypass") then
core.log("action", digger:get_player_name()
.. " tried to dig " .. node.name
.. " at protected position "
.. core.pos_to_string(pos))
core.record_protection_violation(pos, digger:get_player_name())
return
end
core.log('action', digger:get_player_name() .. " digs "
.. node.name .. " at " .. core.pos_to_string(pos))
local wielded = digger:get_wielded_item()
local drops = core.get_node_drops(node.name, wielded:get_name())
local wdef = wielded:get_definition()
local tp = wielded:get_tool_capabilities()
local dp = core.get_dig_params(def.groups, tp)
if wdef and wdef.after_use then
wielded = wdef.after_use(wielded, digger, node, dp) or wielded
else
-- Wear out tool
if not core.setting_getbool("creative_mode") then
wielded:add_wear(dp.wear)
if wielded:get_count() == 0 and wdef.sound and wdef.sound.breaks then
core.sound_play(wdef.sound.breaks, {pos = pos, gain = 0.5})
end
end
end
digger:set_wielded_item(wielded)
-- Handle drops
core.handle_node_drops(pos, drops, digger)
local oldmetadata = nil
if def.after_dig_node then
oldmetadata = core.get_meta(pos):to_table()
end
-- Remove node and update
core.remove_node(pos)
-- Run callback
if def.after_dig_node then
-- Copy pos and node because callback can modify them
local pos_copy = {x=pos.x, y=pos.y, z=pos.z}
local node_copy = {name=node.name, param1=node.param1, param2=node.param2}
def.after_dig_node(pos_copy, node_copy, oldmetadata, digger)
end
-- Run script hook
local _, callback
for _, callback in ipairs(core.registered_on_dignodes) do
local origin = core.callback_origins[callback]
if origin then
core.set_last_run_mod(origin.mod)
--print("Running " .. tostring(callback) ..
-- " (a " .. origin.name .. " callback in " .. origin.mod .. ")")
else
--print("No data associated with callback")
end
-- Copy pos and node because callback can modify them
local pos_copy = {x=pos.x, y=pos.y, z=pos.z}
local node_copy = {name=node.name, param1=node.param1, param2=node.param2}
callback(pos_copy, node_copy, digger)
end
end
-- This is used to allow mods to redefine core.item_place and so on
-- NOTE: This is not the preferred way. Preferred way is to provide enough
-- callbacks to not require redefining global functions. -celeron55
local function redef_wrapper(table, name)
return function(...)
return table[name](...)
end
end
--
-- Item definition defaults
--
core.nodedef_default = {
-- Item properties
type="node",
-- name intentionally not defined here
description = "",
groups = {},
inventory_image = "",
wield_image = "",
wield_scale = {x=1,y=1,z=1},
stack_max = 99,
usable = false,
liquids_pointable = false,
tool_capabilities = nil,
node_placement_prediction = nil,
-- Interaction callbacks
on_place = redef_wrapper(core, 'item_place'), -- core.item_place
on_drop = redef_wrapper(core, 'item_drop'), -- core.item_drop
on_use = nil,
can_dig = nil,
on_punch = redef_wrapper(core, 'node_punch'), -- core.node_punch
on_rightclick = nil,
on_dig = redef_wrapper(core, 'node_dig'), -- core.node_dig
on_receive_fields = nil,
on_metadata_inventory_move = core.node_metadata_inventory_move_allow_all,
on_metadata_inventory_offer = core.node_metadata_inventory_offer_allow_all,
on_metadata_inventory_take = core.node_metadata_inventory_take_allow_all,
-- Node properties
drawtype = "normal",
visual_scale = 1.0,
-- Don't define these because otherwise the old tile_images and
-- special_materials wouldn't be read
--tiles ={""},
--special_tiles = {
-- {name="", backface_culling=true},
-- {name="", backface_culling=true},
--},
alpha = 255,
post_effect_color = {a=0, r=0, g=0, b=0},
paramtype = "none",
paramtype2 = "none",
is_ground_content = true,
sunlight_propagates = false,
walkable = true,
pointable = true,
diggable = true,
climbable = false,
buildable_to = false,
floodable = false,
liquidtype = "none",
liquid_alternative_flowing = "",
liquid_alternative_source = "",
liquid_viscosity = 0,
drowning = 0,
light_source = 0,
damage_per_second = 0,
selection_box = {type="regular"},
legacy_facedir_simple = false,
legacy_wallmounted = false,
}
core.craftitemdef_default = {
type="craft",
-- name intentionally not defined here
description = "",
groups = {},
inventory_image = "",
wield_image = "",
wield_scale = {x=1,y=1,z=1},
stack_max = 99,
liquids_pointable = false,
tool_capabilities = nil,
-- Interaction callbacks
on_place = redef_wrapper(core, 'item_place'), -- core.item_place
on_drop = redef_wrapper(core, 'item_drop'), -- core.item_drop
on_secondary_use = redef_wrapper(core, 'item_secondary_use'),
on_use = nil,
}
core.tooldef_default = {
type="tool",
-- name intentionally not defined here
description = "",
groups = {},
inventory_image = "",
wield_image = "",
wield_scale = {x=1,y=1,z=1},
stack_max = 1,
liquids_pointable = false,
tool_capabilities = nil,
-- Interaction callbacks
on_place = redef_wrapper(core, 'item_place'), -- core.item_place
on_secondary_use = redef_wrapper(core, 'item_secondary_use'),
on_drop = redef_wrapper(core, 'item_drop'), -- core.item_drop
on_use = nil,
}
core.noneitemdef_default = { -- This is used for the hand and unknown items
type="none",
-- name intentionally not defined here
description = "",
groups = {},
inventory_image = "",
wield_image = "",
wield_scale = {x=1,y=1,z=1},
stack_max = 99,
liquids_pointable = false,
tool_capabilities = nil,
-- Interaction callbacks
on_place = redef_wrapper(core, 'item_place'),
on_secondary_use = redef_wrapper(core, 'item_secondary_use'),
on_drop = nil,
on_use = nil,
}