mirror of
https://git.minetest.land/VoxeLibre/VoxeLibre.git
synced 2024-12-27 10:29:34 +01:00
461 lines
12 KiB
Lua
461 lines
12 KiB
Lua
function mesecon.move_node(pos, newpos)
|
||
local node = minetest.get_node(pos)
|
||
local meta = minetest.get_meta(pos):to_table()
|
||
minetest.remove_node(pos)
|
||
minetest.set_node(newpos, node)
|
||
minetest.get_meta(pos):from_table(meta)
|
||
end
|
||
|
||
--Rules rotation Functions:
|
||
function mesecon.rotate_rules_right(rules)
|
||
local nr = {}
|
||
for i, rule in ipairs(rules) do
|
||
table.insert(nr, {
|
||
x = -rule.z,
|
||
y = rule.y,
|
||
z = rule.x,
|
||
name = rule.name,
|
||
spread = rule.spread,})
|
||
end
|
||
return nr
|
||
end
|
||
|
||
function mesecon.rotate_rules_left(rules)
|
||
local nr = {}
|
||
for i, rule in ipairs(rules) do
|
||
table.insert(nr, {
|
||
x = rule.z,
|
||
y = rule.y,
|
||
z = -rule.x,
|
||
name = rule.name,
|
||
spread = rule.spread,})
|
||
end
|
||
return nr
|
||
end
|
||
|
||
function mesecon.rotate_rules_down(rules)
|
||
local nr = {}
|
||
for i, rule in ipairs(rules) do
|
||
table.insert(nr, {
|
||
x = -rule.y,
|
||
y = rule.x,
|
||
z = rule.z,
|
||
name = rule.name,
|
||
spread = rule.spread,})
|
||
end
|
||
return nr
|
||
end
|
||
|
||
function mesecon.rotate_rules_up(rules)
|
||
local nr = {}
|
||
for i, rule in ipairs(rules) do
|
||
table.insert(nr, {
|
||
x = rule.y,
|
||
y = -rule.x,
|
||
z = rule.z,
|
||
name = rule.name,
|
||
spread = rule.spread,})
|
||
end
|
||
return nr
|
||
end
|
||
|
||
function mesecon.flattenrules(allrules)
|
||
--[[
|
||
{
|
||
{
|
||
{xyz},
|
||
{xyz},
|
||
},
|
||
{
|
||
{xyz},
|
||
{xyz},
|
||
},
|
||
}
|
||
--]]
|
||
if allrules[1] and
|
||
allrules[1].x then
|
||
return allrules
|
||
end
|
||
|
||
local shallowrules = {}
|
||
for _, metarule in ipairs( allrules) do
|
||
for _, rule in ipairs(metarule ) do
|
||
table.insert(shallowrules, rule)
|
||
end
|
||
end
|
||
return shallowrules
|
||
--[[
|
||
{
|
||
{xyz},
|
||
{xyz},
|
||
{xyz},
|
||
{xyz},
|
||
}
|
||
--]]
|
||
end
|
||
|
||
function mesecon.rule2bit(findrule, allrules)
|
||
--get the bit of the metarule the rule is in, or bit 1
|
||
if (allrules[1] and
|
||
allrules[1].x) or
|
||
not findrule then
|
||
return 1
|
||
end
|
||
for m,metarule in ipairs( allrules) do
|
||
for _, rule in ipairs(metarule ) do
|
||
if vector.equals(findrule, rule) then
|
||
return m
|
||
end
|
||
end
|
||
end
|
||
end
|
||
|
||
function mesecon.rule2metaindex(findrule, allrules)
|
||
--get the metarule the rule is in, or allrules
|
||
if allrules[1].x then
|
||
return nil
|
||
end
|
||
|
||
if not(findrule) then
|
||
return mesecon.flattenrules(allrules)
|
||
end
|
||
|
||
for m, metarule in ipairs( allrules) do
|
||
for _, rule in ipairs(metarule ) do
|
||
if vector.equals(findrule, rule) then
|
||
return m
|
||
end
|
||
end
|
||
end
|
||
end
|
||
|
||
function mesecon.rule2meta(findrule, allrules)
|
||
if #allrules == 0 then return {} end
|
||
|
||
local index = mesecon.rule2metaindex(findrule, allrules)
|
||
if index == nil then
|
||
if allrules[1].x then
|
||
return allrules
|
||
else
|
||
return {}
|
||
end
|
||
end
|
||
return allrules[index]
|
||
end
|
||
|
||
-- Returns the 6 immediate neighbors of pos
|
||
-- (nodes which touch the sides of pos).
|
||
-- NOT PART OF ORIGINAL MESECONS!
|
||
function mesecon.mcl_get_neighbors(pos)
|
||
local r = mesecon.rules.alldirs
|
||
local e = {}
|
||
for i=1, #r do
|
||
table.insert(e, { pos = vector.add(pos, r[i]), link = r[i] })
|
||
end
|
||
return e
|
||
end
|
||
|
||
function mesecon.dec2bin(n)
|
||
local x, y = math.floor(n / 2), n % 2
|
||
if (n > 1) then
|
||
return mesecon.dec2bin(x)..y
|
||
else
|
||
return ""..y
|
||
end
|
||
end
|
||
|
||
function mesecon.getstate(nodename, states)
|
||
for state, name in ipairs(states) do
|
||
if name == nodename then
|
||
return state
|
||
end
|
||
end
|
||
error(nodename.." doesn't mention itself in "..dump(states))
|
||
end
|
||
|
||
function mesecon.getbinstate(nodename, states)
|
||
return mesecon.dec2bin(mesecon.getstate(nodename, states)-1)
|
||
end
|
||
|
||
function mesecon.get_bit(binary,bit)
|
||
bit = bit or 1
|
||
local c = binary:len()-(bit-1)
|
||
return binary:sub(c,c) == "1"
|
||
end
|
||
|
||
function mesecon.set_bit(binary,bit,value)
|
||
if value == "1" then
|
||
if not mesecon.get_bit(binary,bit) then
|
||
return mesecon.dec2bin(tonumber(binary,2)+math.pow(2,bit-1))
|
||
end
|
||
elseif value == "0" then
|
||
if mesecon.get_bit(binary,bit) then
|
||
return mesecon.dec2bin(tonumber(binary,2)-math.pow(2,bit-1))
|
||
end
|
||
end
|
||
return binary
|
||
|
||
end
|
||
|
||
function mesecon.invertRule(r)
|
||
local spread = r.spread
|
||
r = vector.multiply(r, -1)
|
||
if spread then
|
||
r.spread = true
|
||
end
|
||
return r
|
||
end
|
||
|
||
function mesecon.tablecopy(table) -- deep table copy
|
||
if type(table) ~= "table" then return table end -- no need to copy
|
||
local newtable = {}
|
||
|
||
for idx, item in pairs(table) do
|
||
if type(item) == "table" then
|
||
newtable[idx] = mesecon.tablecopy(item)
|
||
else
|
||
newtable[idx] = item
|
||
end
|
||
end
|
||
|
||
return newtable
|
||
end
|
||
|
||
function mesecon.cmpAny(t1, t2)
|
||
if type(t1) ~= type(t2) then return false end
|
||
if type(t1) ~= "table" and type(t2) ~= "table" then return t1 == t2 end
|
||
|
||
for i, e in pairs(t1) do
|
||
if not mesecon.cmpAny(e, t2[i]) then return false end
|
||
end
|
||
|
||
return true
|
||
end
|
||
|
||
-- does not overwrite values; number keys (ipairs) are appended, not overwritten
|
||
function mesecon.mergetable(source, dest)
|
||
local rval = mesecon.tablecopy(dest)
|
||
|
||
for k, v in pairs(source) do
|
||
rval[k] = dest[k] or mesecon.tablecopy(v)
|
||
end
|
||
for i, v in ipairs(source) do
|
||
table.insert(rval, mesecon.tablecopy(v))
|
||
end
|
||
|
||
return rval
|
||
end
|
||
|
||
function mesecon.register_node(name, spec_common, spec_off, spec_on)
|
||
spec_common.drop = spec_common.drop or name .. "_off"
|
||
spec_common.on_blast = spec_common.on_blast or mesecon.on_blastnode
|
||
spec_common.__mesecon_basename = name
|
||
spec_on.__mesecon_state = "on"
|
||
spec_off.__mesecon_state = "off"
|
||
|
||
spec_on = mesecon.mergetable(spec_common, spec_on);
|
||
spec_off = mesecon.mergetable(spec_common, spec_off);
|
||
|
||
minetest.register_node(name .. "_on", spec_on)
|
||
minetest.register_node(name .. "_off", spec_off)
|
||
end
|
||
|
||
-- swap onstate and offstate nodes, returns new state
|
||
function mesecon.flipstate(pos, node)
|
||
local nodedef = minetest.registered_nodes[node.name]
|
||
local newstate
|
||
if (nodedef.__mesecon_state == "on") then newstate = "off" end
|
||
if (nodedef.__mesecon_state == "off") then newstate = "on" end
|
||
|
||
minetest.swap_node(pos, {name = nodedef.__mesecon_basename .. "_" .. newstate,
|
||
param2 = node.param2})
|
||
|
||
return newstate
|
||
end
|
||
|
||
-- File writing / reading utilities
|
||
local wpath = minetest.get_worldpath()
|
||
function mesecon.file2table(filename)
|
||
local f = io.open(wpath..DIR_DELIM..filename, "r")
|
||
if f == nil then return {} end
|
||
local t = f:read("*all")
|
||
f:close()
|
||
if t == "" or t == nil then return {} end
|
||
return minetest.deserialize(t)
|
||
end
|
||
|
||
function mesecon.table2file(filename, table)
|
||
local f = io.open(wpath..DIR_DELIM..filename, "w")
|
||
f:write(minetest.serialize(table))
|
||
f:close()
|
||
end
|
||
|
||
-- Block position "hashing" (convert to integer) functions for voxelmanip cache
|
||
local BLOCKSIZE = 16
|
||
|
||
-- convert node position --> block hash
|
||
local function hash_blockpos(pos)
|
||
return minetest.hash_node_position({
|
||
x = math.floor(pos.x/BLOCKSIZE),
|
||
y = math.floor(pos.y/BLOCKSIZE),
|
||
z = math.floor(pos.z/BLOCKSIZE)
|
||
})
|
||
end
|
||
|
||
-- Maps from a hashed mapblock position (as returned by hash_blockpos) to a
|
||
-- table.
|
||
--
|
||
-- Contents of the table are:
|
||
-- “vm” → the VoxelManipulator
|
||
-- “va” → the VoxelArea
|
||
-- “data” → the data array
|
||
-- “param1” → the param1 array
|
||
-- “param2” → the param2 array
|
||
-- “dirty” → true if data has been modified
|
||
--
|
||
-- Nil if no VM-based transaction is in progress.
|
||
local vm_cache = nil
|
||
|
||
-- Starts a VoxelManipulator-based transaction.
|
||
--
|
||
-- During a VM transaction, calls to vm_get_node and vm_swap_node operate on a
|
||
-- cached copy of the world loaded via VoxelManipulators. That cache can later
|
||
-- be committed to the real map by means of vm_commit or discarded by means of
|
||
-- vm_abort.
|
||
function mesecon.vm_begin()
|
||
vm_cache = {}
|
||
end
|
||
|
||
-- Finishes a VoxelManipulator-based transaction, freeing the VMs and map data
|
||
-- and writing back any modified areas.
|
||
function mesecon.vm_commit()
|
||
for hash, tbl in pairs(vm_cache) do
|
||
if tbl.dirty then
|
||
local vm = tbl.vm
|
||
vm:set_data(tbl.data)
|
||
vm:write_to_map()
|
||
vm:update_map()
|
||
end
|
||
end
|
||
vm_cache = nil
|
||
end
|
||
|
||
-- Finishes a VoxelManipulator-based transaction, freeing the VMs and throwing
|
||
-- away any modified areas.
|
||
function mesecon.vm_abort()
|
||
vm_cache = nil
|
||
end
|
||
|
||
-- Gets the cache entry covering a position, populating it if necessary.
|
||
local function vm_get_or_create_entry(pos)
|
||
local hash = hash_blockpos(pos)
|
||
local tbl = vm_cache[hash]
|
||
if not tbl then
|
||
local vm = minetest.get_voxel_manip(pos, pos)
|
||
local min_pos, max_pos = vm:get_emerged_area()
|
||
local va = VoxelArea:new{MinEdge = min_pos, MaxEdge = max_pos}
|
||
tbl = {vm = vm, va = va, data = vm:get_data(), param1 = vm:get_light_data(), param2 = vm:get_param2_data(), dirty = false}
|
||
vm_cache[hash] = tbl
|
||
end
|
||
return tbl
|
||
end
|
||
|
||
-- Gets the node at a given position during a VoxelManipulator-based
|
||
-- transaction.
|
||
function mesecon.vm_get_node(pos)
|
||
local tbl = vm_get_or_create_entry(pos)
|
||
local index = tbl.va:indexp(pos)
|
||
local node_value = tbl.data[index]
|
||
if node_value == minetest.CONTENT_IGNORE then
|
||
return nil
|
||
else
|
||
local node_param1 = tbl.param1[index]
|
||
local node_param2 = tbl.param2[index]
|
||
return {name = minetest.get_name_from_content_id(node_value), param1 = node_param1, param2 = node_param2}
|
||
end
|
||
end
|
||
|
||
-- Sets a node’s name during a VoxelManipulator-based transaction.
|
||
--
|
||
-- Existing param1, param2, and metadata are left alone.
|
||
function mesecon.vm_swap_node(pos, name)
|
||
local tbl = vm_get_or_create_entry(pos)
|
||
local index = tbl.va:indexp(pos)
|
||
tbl.data[index] = minetest.get_content_id(name)
|
||
tbl.dirty = true
|
||
end
|
||
|
||
-- Gets the node at a given position, regardless of whether it is loaded or
|
||
-- not, respecting a transaction if one is in progress.
|
||
--
|
||
-- Outside a VM transaction, if the mapblock is not loaded, it is pulled into
|
||
-- the server’s main map data cache and then accessed from there.
|
||
--
|
||
-- Inside a VM transaction, the transaction’s VM cache is used.
|
||
function mesecon.get_node_force(pos)
|
||
if vm_cache then
|
||
return mesecon.vm_get_node(pos)
|
||
else
|
||
local node = minetest.get_node_or_nil(pos)
|
||
if node == nil then
|
||
-- Node is not currently loaded; use a VoxelManipulator to prime
|
||
-- the mapblock cache and try again.
|
||
minetest.get_voxel_manip(pos, pos)
|
||
node = minetest.get_node_or_nil(pos)
|
||
end
|
||
return node
|
||
end
|
||
end
|
||
|
||
-- Swaps the node at a given position, regardless of whether it is loaded or
|
||
-- not, respecting a transaction if one is in progress.
|
||
--
|
||
-- Outside a VM transaction, if the mapblock is not loaded, it is pulled into
|
||
-- the server’s main map data cache and then accessed from there.
|
||
--
|
||
-- Inside a VM transaction, the transaction’s VM cache is used.
|
||
--
|
||
-- This function can only be used to change the node’s name, not its parameters
|
||
-- or metadata.
|
||
function mesecon.swap_node_force(pos, name)
|
||
if vm_cache then
|
||
return mesecon.vm_swap_node(pos, name)
|
||
else
|
||
-- This serves to both ensure the mapblock is loaded and also hand us
|
||
-- the old node table so we can preserve param2.
|
||
local node = mesecon.get_node_force(pos)
|
||
node.name = name
|
||
minetest.swap_node(pos, node)
|
||
end
|
||
end
|
||
|
||
-- Autoconnect Hooks
|
||
-- Nodes like conductors may change their appearance and their connection rules
|
||
-- right after being placed or after being dug, e.g. the default wires use this
|
||
-- to automatically connect to linking nodes after placement.
|
||
-- After placement, the update function will be executed immediately so that the
|
||
-- possibly changed rules can be taken into account when recalculating the circuit.
|
||
-- After digging, the update function will be queued and executed after
|
||
-- recalculating the circuit. The update function must take care of updating the
|
||
-- node at the given position itself, but also all of the other nodes the given
|
||
-- position may have (had) a linking connection to.
|
||
mesecon.autoconnect_hooks = {}
|
||
|
||
-- name: A unique name for the hook, e.g. "foowire". Used to name the actionqueue function.
|
||
-- fct: The update function with parameters function(pos, node)
|
||
function mesecon.register_autoconnect_hook(name, fct)
|
||
mesecon.autoconnect_hooks[name] = fct
|
||
mesecon.queue:add_function("autoconnect_hook_"..name, fct)
|
||
end
|
||
|
||
function mesecon.execute_autoconnect_hooks_now(pos, node)
|
||
for _, fct in pairs(mesecon.autoconnect_hooks) do
|
||
fct(pos, node)
|
||
end
|
||
end
|
||
|
||
function mesecon.execute_autoconnect_hooks_queue(pos, node)
|
||
for name in pairs(mesecon.autoconnect_hooks) do
|
||
mesecon.queue:add_action(pos, "autoconnect_hook_"..name, {node})
|
||
end
|
||
end
|