267 lines
9 KiB
Lua
267 lines
9 KiB
Lua
--- Schematic serialization and deserialiation.
|
|
-- @module worldedit.serialization
|
|
|
|
worldedit.LATEST_SERIALIZATION_VERSION = 5
|
|
local LATEST_SERIALIZATION_HEADER = worldedit.LATEST_SERIALIZATION_VERSION .. ":"
|
|
|
|
|
|
--[[
|
|
Serialization version history:
|
|
1: Original format. Serialized Lua table with a weird linked format...
|
|
2: Position and node seperated into sub-tables in fields `1` and `2`.
|
|
3: List of nodes, one per line, with fields seperated by spaces.
|
|
Format: <X> <Y> <Z> <Name> <Param1> <Param2>
|
|
4: Serialized Lua table containing a list of nodes with `x`, `y`, `z`,
|
|
`name`, `param1`, `param2`, and `meta` fields.
|
|
5: Added header and made `param1`, `param2`, and `meta` fields optional.
|
|
Header format: <Version>,<ExtraHeaderField1>,...:<Content>
|
|
--]]
|
|
|
|
|
|
--- Reads the header of serialized data.
|
|
-- @param value Serialized WorldEdit data.
|
|
-- @return The version as a positive natural number, or 0 for unknown versions.
|
|
-- @return Extra header fields as a list of strings, or nil if not supported.
|
|
-- @return Content (data after header).
|
|
function worldedit.read_header(value)
|
|
if value:find("^[0-9]+[,:]") then
|
|
local header_end = value:find(":", 1, true)
|
|
local header = value:sub(1, header_end - 1):split(",")
|
|
local version = tonumber(header[1])
|
|
table.remove(header, 1)
|
|
local content = value:sub(header_end + 1)
|
|
return version, header, content
|
|
end
|
|
-- Old versions that didn't include a header with a version number
|
|
if value:find("([+-]?%d+)%s+([+-]?%d+)%s+([+-]?%d+)") and not value:find("%{") then -- List format
|
|
return 3, nil, value
|
|
elseif value:find("^[^\"']+%{%d+%}") then
|
|
if value:find("%[\"meta\"%]") then -- Meta flat table format
|
|
return 2, nil, value
|
|
end
|
|
return 1, nil, value -- Flat table format
|
|
elseif value:find("%{") then -- Raw nested table format
|
|
return 4, nil, value
|
|
end
|
|
return nil
|
|
end
|
|
|
|
|
|
--- Converts the region defined by positions `pos1` and `pos2`
|
|
-- into a single string.
|
|
-- @return The serialized data.
|
|
-- @return The number of nodes serialized.
|
|
function worldedit.serialize(pos1, pos2)
|
|
pos1, pos2 = worldedit.sort_pos(pos1, pos2)
|
|
|
|
worldedit.keep_loaded(pos1, pos2)
|
|
|
|
local get_node, get_meta, hash_node_position =
|
|
minetest.get_node, minetest.get_meta, minetest.hash_node_position
|
|
|
|
-- Find the positions which have metadata
|
|
local has_meta = {}
|
|
local meta_positions = minetest.find_nodes_with_meta(pos1, pos2)
|
|
for i = 1, #meta_positions do
|
|
has_meta[hash_node_position(meta_positions[i])] = true
|
|
end
|
|
|
|
local pos = vector.new(pos1.x, 0, 0)
|
|
local count = 0
|
|
local result = {}
|
|
while pos.x <= pos2.x do
|
|
pos.y = pos1.y
|
|
while pos.y <= pos2.y do
|
|
pos.z = pos1.z
|
|
while pos.z <= pos2.z do
|
|
local node = get_node(pos)
|
|
if node.name ~= "air" and node.name ~= "ignore" then
|
|
count = count + 1
|
|
|
|
local meta
|
|
if has_meta[hash_node_position(pos)] then
|
|
meta = get_meta(pos):to_table()
|
|
|
|
-- Convert metadata item stacks to item strings
|
|
for _, invlist in pairs(meta.inventory) do
|
|
for index = 1, #invlist do
|
|
local itemstack = invlist[index]
|
|
if itemstack.to_string then
|
|
invlist[index] = itemstack:to_string()
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
result[count] = {
|
|
x = pos.x - pos1.x,
|
|
y = pos.y - pos1.y,
|
|
z = pos.z - pos1.z,
|
|
name = node.name,
|
|
param1 = node.param1 ~= 0 and node.param1 or nil,
|
|
param2 = node.param2 ~= 0 and node.param2 or nil,
|
|
meta = meta,
|
|
}
|
|
end
|
|
pos.z = pos.z + 1
|
|
end
|
|
pos.y = pos.y + 1
|
|
end
|
|
pos.x = pos.x + 1
|
|
end
|
|
-- Serialize entries
|
|
result = minetest.serialize(result)
|
|
return LATEST_SERIALIZATION_HEADER .. result, count
|
|
end
|
|
|
|
local function deserialize_workaround(content)
|
|
local nodes, err
|
|
if not minetest.global_exists("jit") then
|
|
nodes, err = minetest.deserialize(content, true)
|
|
elseif not content:match("^%s*return%s*{") then
|
|
-- The data doesn't look like we expect it to so we can't apply the workaround.
|
|
-- hope for the best
|
|
minetest.log("warning", "WorldEdit: deserializing data but can't apply LuaJIT workaround")
|
|
nodes, err = minetest.deserialize(content, true)
|
|
else
|
|
-- XXX: This is a filthy hack that works surprisingly well
|
|
-- in LuaJIT, `minetest.deserialize` will fail due to the register limit
|
|
nodes = {}
|
|
content = content:gsub("^%s*return%s*{", "", 1):gsub("}%s*$", "", 1) -- remove the starting and ending values to leave only the node data
|
|
-- remove string contents strings while preserving their length
|
|
local escaped = content:gsub("\\\\", "@@"):gsub("\\\"", "@@"):gsub("(\"[^\"]*\")", function(s) return string.rep("@", #s) end)
|
|
local startpos, startpos1 = 1, 1
|
|
local endpos
|
|
local entry
|
|
while true do -- go through each individual node entry (except the last)
|
|
startpos, endpos = escaped:find("}%s*,%s*{", startpos)
|
|
if not startpos then
|
|
break
|
|
end
|
|
local current = content:sub(startpos1, startpos)
|
|
entry, err = minetest.deserialize("return " .. current, true)
|
|
if not entry then
|
|
break
|
|
end
|
|
table.insert(nodes, entry)
|
|
startpos, startpos1 = endpos, endpos
|
|
end
|
|
if not err then
|
|
entry = minetest.deserialize("return " .. content:sub(startpos1), true) -- process the last entry
|
|
table.insert(nodes, entry)
|
|
end
|
|
end
|
|
if err then
|
|
minetest.log("warning", "WorldEdit: deserialize: " .. err)
|
|
end
|
|
return nodes
|
|
end
|
|
|
|
--- Loads the schematic in `value` into a node list in the latest format.
|
|
-- @return A node list in the latest format, or nil on failure.
|
|
local function load_schematic(value)
|
|
local version, _, content = worldedit.read_header(value)
|
|
local nodes = {}
|
|
if version == 1 or version == 2 then -- Original flat table format
|
|
local tables = minetest.deserialize(content, true)
|
|
if not tables then return nil end
|
|
|
|
-- Transform the node table into an array of nodes
|
|
for i = 1, #tables do
|
|
for j, v in pairs(tables[i]) do
|
|
if type(v) == "table" then
|
|
tables[i][j] = tables[v[1]]
|
|
end
|
|
end
|
|
end
|
|
nodes = tables[1]
|
|
|
|
if version == 1 then --original flat table format
|
|
for i, entry in ipairs(nodes) do
|
|
local pos = entry[1]
|
|
entry.x, entry.y, entry.z = pos.x, pos.y, pos.z
|
|
entry[1] = nil
|
|
local node = entry[2]
|
|
entry.name, entry.param1, entry.param2 = node.name, node.param1, node.param2
|
|
entry[2] = nil
|
|
end
|
|
end
|
|
elseif version == 3 then -- List format
|
|
for x, y, z, name, param1, param2 in content:gmatch(
|
|
"([+-]?%d+)%s+([+-]?%d+)%s+([+-]?%d+)%s+" ..
|
|
"([^%s]+)%s+(%d+)%s+(%d+)[^\r\n]*[\r\n]*") do
|
|
param1, param2 = tonumber(param1), tonumber(param2)
|
|
table.insert(nodes, {
|
|
x = tonumber(x),
|
|
y = tonumber(y),
|
|
z = tonumber(z),
|
|
name = name,
|
|
param1 = param1 ~= 0 and param1 or nil,
|
|
param2 = param2 ~= 0 and param2 or nil,
|
|
})
|
|
end
|
|
elseif version == 4 or version == 5 then -- Nested table format
|
|
nodes = deserialize_workaround(content)
|
|
else
|
|
return nil
|
|
end
|
|
return nodes
|
|
end
|
|
|
|
--- Determines the volume the nodes represented by string `value` would occupy
|
|
-- if deserialized at `origin_pos`.
|
|
-- @return Low corner position.
|
|
-- @return High corner position.
|
|
-- @return The number of nodes.
|
|
function worldedit.allocate(origin_pos, value)
|
|
local nodes = load_schematic(value)
|
|
if not nodes or #nodes == 0 then return nil end
|
|
return worldedit.allocate_with_nodes(origin_pos, nodes)
|
|
end
|
|
|
|
|
|
-- Internal
|
|
function worldedit.allocate_with_nodes(origin_pos, nodes)
|
|
local huge = math.huge
|
|
local pos1x, pos1y, pos1z = huge, huge, huge
|
|
local pos2x, pos2y, pos2z = -huge, -huge, -huge
|
|
local origin_x, origin_y, origin_z = origin_pos.x, origin_pos.y, origin_pos.z
|
|
for i, entry in ipairs(nodes) do
|
|
local x, y, z = origin_x + entry.x, origin_y + entry.y, origin_z + entry.z
|
|
if x < pos1x then pos1x = x end
|
|
if y < pos1y then pos1y = y end
|
|
if z < pos1z then pos1z = z end
|
|
if x > pos2x then pos2x = x end
|
|
if y > pos2y then pos2y = y end
|
|
if z > pos2z then pos2z = z end
|
|
end
|
|
return vector.new(pos1x, pos1y, pos1z), vector.new(pos2x, pos2y, pos2z), #nodes
|
|
end
|
|
|
|
|
|
--- Loads the nodes represented by string `value` at position `origin_pos`.
|
|
-- @return The number of nodes deserialized.
|
|
function worldedit.deserialize(origin_pos, value)
|
|
local nodes = load_schematic(value)
|
|
if not nodes then return nil end
|
|
if #nodes == 0 then return #nodes end
|
|
|
|
local pos1, pos2 = worldedit.allocate_with_nodes(origin_pos, nodes)
|
|
worldedit.keep_loaded(pos1, pos2)
|
|
|
|
local origin_x, origin_y, origin_z = origin_pos.x, origin_pos.y, origin_pos.z
|
|
local add_node, get_meta = minetest.add_node, minetest.get_meta
|
|
local registered_nodes = minetest.registered_nodes
|
|
for i, entry in ipairs(nodes) do
|
|
if registered_nodes[entry.name] then
|
|
entry.x, entry.y, entry.z = origin_x + entry.x, origin_y + entry.y, origin_z + entry.z
|
|
-- Entry acts as both position and node
|
|
add_node(entry, entry)
|
|
if entry.meta then
|
|
get_meta(entry):from_table(entry.meta)
|
|
end
|
|
end
|
|
end
|
|
return #nodes
|
|
end
|
|
|