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VoxeLibre/mods/CORE/mcl_util/init.lua

281 lines
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Lua

mcl_util = {}
-- Based on minetest.rotate_and_place
--[[
Attempt to predict the desired orientation of the pillar-like node
defined by `itemstack`, and place it accordingly in one of 3 possible
orientations (X, Y or Z).
Stacks are handled normally if the `infinitestacks`
field is false or omitted (else, the itemstack is not changed).
* `invert_wall`: if `true`, place wall-orientation on the ground and ground-
orientation on wall
This function is a simplified version of minetest.rotate_and_place.
The Minetest function is seen as inappropriate because this includes mirror
images of possible orientations, causing problems with pillar shadings.
]]
function mcl_util.rotate_axis_and_place(itemstack, placer, pointed_thing, infinitestacks, invert_wall)
local unode = minetest.get_node_or_nil(pointed_thing.under)
if not unode then
return
end
local undef = minetest.registered_nodes[unode.name]
if undef and undef.on_rightclick then
undef.on_rightclick(pointed_thing.under, unode, placer,
itemstack, pointed_thing)
return
end
local fdir = minetest.dir_to_facedir(placer:get_look_dir())
local wield_name = itemstack:get_name()
local above = pointed_thing.above
local under = pointed_thing.under
local is_x = (above.x ~= under.x)
local is_y = (above.y ~= under.y)
local is_z = (above.z ~= under.z)
local anode = minetest.get_node_or_nil(above)
if not anode then
return
end
local pos = pointed_thing.above
local node = anode
if undef and undef.buildable_to then
pos = pointed_thing.under
node = unode
end
if minetest.is_protected(pos, placer:get_player_name()) then
minetest.record_protection_violation(pos, placer:get_player_name())
return
end
local ndef = minetest.registered_nodes[node.name]
if not ndef or not ndef.buildable_to then
return
end
local p2
if is_y then
if invert_wall then
if fdir == 3 or fdir == 1 then
p2 = 12
else
p2 = 6
end
end
elseif is_x then
if invert_wall then
p2 = 0
else
p2 = 12
end
elseif is_z then
if invert_wall then
p2 = 0
else
p2 = 6
end
end
minetest.set_node(pos, {name = wield_name, param2 = p2})
if not infinitestacks then
itemstack:take_item()
return itemstack
end
end
-- Wrapper of above function for use as `on_place` callback (Recommended).
-- Similar to minetest.rotate_node.
function mcl_util.rotate_axis(itemstack, placer, pointed_thing)
mcl_util.rotate_axis_and_place(itemstack, placer, pointed_thing,
core.setting_getbool("creative_mode"),
placer:get_player_control().sneak)
return itemstack
end
-- Moves a single item from one inventory to another
--- source_inventory: Inventory to take the item from
--- source_list: List name of the source inventory from which to take the item
--- source_stack_id: The inventory position ID of the source inventory to take the item from (-1 for first occupied slot)
--- destination_inventory: Put item into this inventory
--- destination_list: List name of the destination inventory to which to put the item into
-- Returns true on success and false on failure
-- Possible failures: No item in source slot, destination inventory full
function mcl_util.move_item(source_inventory, source_list, source_stack_id, destination_inventory, destination_list)
if source_stack_id == -1 then
source_stack_id = mcl_util.get_first_occupied_inventory_slot(source_inventory, source_list)
if source_stack_id == nil then
return false
end
end
if not source_inventory:is_empty(source_list) then
local stack = source_inventory:get_stack(source_list, source_stack_id)
local item = stack:get_name()
if not stack:is_empty() then
if not destination_inventory:room_for_item(destination_list, item) then
return false
end
stack:take_item()
source_inventory:set_stack(source_list, source_stack_id, stack)
destination_inventory:add_item(destination_list, item)
return true
end
end
return false
end
-- Moves a single item from one container node into another.
--- source_pos: Position ({x,y,z}) of the node to take the item from
--- source_list: List name of the source inventory from which to take the item
--- source_stack_id: The inventory position ID of the source inventory to take the item from (-1 for first occupied slot)
--- destination_pos: Position ({x,y,z}) of the node to put the item into
--- destination_list: (optional) list name of the destination inventory. If not set, the main or source list will be used
-- Returns true on success and false on failure
function mcl_util.move_item_container(source_pos, source_list, source_stack_id, destination_pos, destination_list)
local smeta = minetest.get_meta(source_pos)
local dmeta = minetest.get_meta(destination_pos)
local sinv = smeta:get_inventory()
local dinv = dmeta:get_inventory()
local snodedef = minetest.registered_nodes[minetest.get_node(source_pos).name]
local dnodedef = minetest.registered_nodes[minetest.get_node(destination_pos).name]
if source_stack_id == -1 then
source_stack_id = mcl_util.get_first_occupied_inventory_slot(sinv, source_list)
if source_stack_id == nil then
return false
end
end
-- If it's a container, put it into the container
if dnodedef.groups.container then
-- Automatically select a destination list if omitted
if not destination_list then
if dnodedef.groups.container == 2 or snodedef.groups.continer == 3 then
destination_list = "main"
elseif dnodedef.groups.container == 3 then
local stack = sinv:get_stack(source_list, source_stack_id)
local def = minetest.registered_nodes[stack:get_name()]
if stack and (not stack:is_empty()) and (not (def and def.groups and def.groups.shulker_box)) then
destination_list = "main"
end
elseif dnodedef.groups.container == 4 then
destination_list = "src"
end
end
if destination_list then
return mcl_util.move_item(sinv, source_list, source_stack_id, dinv, destination_list)
end
end
return false
end
-- Returns the ID of the first non-empty slot in the given inventory list
-- or nil, if inventory is empty.
function mcl_util.get_first_occupied_inventory_slot(inventory, listname)
for i=1, inventory:get_size(listname) do
local stack = inventory:get_stack(listname, i)
if not stack:is_empty() then
return i
end
end
return nil
end
-- Returns true if item (itemstring or ItemStack) can be used as a furnace fuel.
-- Returns false otherwise
function mcl_util.is_fuel(item)
return minetest.get_craft_result({method="fuel", width=1, items={item}}).time ~= 0
end
-- For a given position, returns a 2-tuple:
-- 1st return value: true if pos is in void
-- 2nd return value: true if it is in the deadly part of the void
function mcl_util.is_in_void(pos)
local void, void_deadly
void = pos.y < mcl_vars.mg_overworld_min
void_deadly = pos.y < mcl_vars.mg_overworld_min - 64
return void, void_deadly
end
-- Here come 2 simple converter functions which are important for map generators and mob spawning
-- Takes an Y coordinate as input and returns:
-- 1) The corresponding Minecraft layer (can be nil if void)
-- 2) The corresponding Minecraft dimension ("overworld", "nether" or "end") or "void" if it is in the void
-- If the Y coordinate is not located in any dimension, it will return:
-- nil, "void"
function mcl_util.y_to_layer(y)
if y >= mcl_vars.mg_overworld_min then
return y - mcl_vars.mg_overworld_min, "overworld"
else
return nil, "void"
end
end
-- Takes a Minecraft layer and a “dimension” name
-- and returns the corresponding Y coordinate for
-- MineClone 2.
-- minecraft_dimension parameter is ignored at the moment
-- TODO: Implement dimensions
function mcl_util.layer_to_y(layer, minecraft_dimension)
return layer + mcl_vars.mg_overworld_min
end
-- Returns a on_place function for plants
-- * condition: function(pos, node)
-- * A function which is called by the on_place function to check if the node can be placed
-- * Must return true, if placement is allowed, false otherwise
-- * pos, node: Position and node table of plant node
function mcl_util.generate_on_place_plant_function(condition)
return function(itemstack, placer, pointed_thing)
if pointed_thing.type ~= "node" then
-- no interaction possible with entities
return itemstack
end
-- Call on_rightclick if the pointed node defines it
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
local place_pos
local def_under = minetest.registered_nodes[minetest.get_node(pointed_thing.under).name]
local def_above = minetest.registered_nodes[minetest.get_node(pointed_thing.above).name]
if def_under.buildable_to then
place_pos = pointed_thing.under
elseif def_above.buildable_to then
place_pos = pointed_thing.above
else
return itemstack
end
-- Check placement rules
if (condition(place_pos, node) == true) then
local idef = itemstack:get_definition()
local new_itemstack, success = minetest.item_place_node(itemstack, placer, pointed_thing)
if success then
if idef.sounds and idef.sounds.place then
minetest.sound_play(idef.sounds.place, {pos=above, gain=1})
end
end
itemstack = new_itemstack
end
return itemstack
end
end