worldedit = worldedit or {} --modifies positions `pos1` and `pos2` so that each component of `pos1` is less than or equal to its corresponding conent of `pos2`, returning two new positions worldedit.sort_pos = function(pos1, pos2) pos1 = {x=pos1.x, y=pos1.y, z=pos1.z} pos2 = {x=pos2.x, y=pos2.y, z=pos2.z} if pos1.x > pos2.x then pos2.x, pos1.x = pos1.x, pos2.x end if pos1.y > pos2.y then pos2.y, pos1.y = pos1.y, pos2.y end if pos1.z > pos2.z then pos2.z, pos1.z = pos1.z, pos2.z end return pos1, pos2 end --determines the version of serialized data `value`, returning the version as a positive integer or 0 for unknown versions worldedit.valueversion = function(value) if value:find("([+-]?%d+)%s+([+-]?%d+)%s+([+-]?%d+)") and not value:find("%{") then --previous list format return 3 elseif value:find("^[^\"']+%{%d+%}") then if value:find("%[\"meta\"%]") then --previous meta flat table format return 2 end return 1 --original flat table format elseif value:find("%{") then --current nested table format return 4 end return 0 --unknown format end --converts the region defined by positions `pos1` and `pos2` into a single string, returning the serialized data and the number of nodes serialized worldedit.serialize = function(pos1, pos2) --wip: check for ItemStacks and whether they can be serialized local pos1, pos2 = worldedit.sort_pos(pos1, pos2) local pos = {x=pos1.x, y=0, z=0} local count = 0 local result = {} local env = minetest.env 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 = env:get_node(pos) if node.name ~= "air" and node.name ~= "ignore" then count = count + 1 local meta = env:get_meta(pos):to_table() result[count] = { x = pos.x - pos1.x, y = pos.y - pos1.y, z = pos.z - pos1.z, name = node.name, param1 = node.param1, param2 = node.param2, meta = meta, } end pos.z = pos.z + 1 end pos.y = pos.y + 1 end pos.x = pos.x + 1 end result = minetest.serialize(result) --convert entries to a string return result, count end --determines the volume the nodes represented by string `value` would occupy if deserialized at `originpos`, returning the two corner positions and the number of nodes --contains code based on [table.save/table.load](http://lua-users.org/wiki/SaveTableToFile) by ChillCode, available under the MIT license (GPL compatible) worldedit.allocate = function(originpos, value) local huge = math.huge local pos1x, pos1y, pos1z = huge, huge, huge local pos2x, pos2y, pos2z = -huge, -huge, -huge local originx, originy, originz = originpos.x, originpos.y, originpos.z local count = 0 local version = worldedit.valueversion(value) if version == 1 or version == 2 then --flat table format --obtain the node table local get_tables = loadstring(value) if get_tables then --error loading value return originpos, originpos, count end local tables = get_tables() --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 local nodes = tables[1] --check the node array count = #nodes if version == 1 then --original flat table format for index = 1, count do local entry = nodes[index] local pos = entry[1] local x, y, z = originx - pos.x, originy - pos.y, originz - pos.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 else --previous meta flat table format for index = 1, count do local entry = nodes[index] local x, y, z = originx - entry.x, originy - entry.y, originz - 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 end elseif version == 3 then --previous list format for x, y, z, name, param1, param2 in value:gmatch("([+-]?%d+)%s+([+-]?%d+)%s+([+-]?%d+)%s+([^%s]+)%s+(%d+)%s+(%d+)[^\r\n]*[\r\n]*") do --match node entries x, y, z = originx + tonumber(x), originy + tonumber(y), originz + tonumber(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 count = count + 1 end elseif version == 4 then --current nested table format local nodes = minetest.deserialize(value) count = #nodes for index = 1, count do local entry = nodes[index] x, y, z = originx + entry.x, originy + entry.y, originz + 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 end local pos1 = {x=pos1x, y=pos1y, z=pos1z} local pos2 = {x=pos2x, y=pos2y, z=pos2z} return pos1, pos2, count end --loads the nodes represented by string `value` at position `originpos`, returning the number of nodes deserialized --contains code based on [table.save/table.load](http://lua-users.org/wiki/SaveTableToFile) by ChillCode, available under the MIT license (GPL compatible) worldedit.deserialize = function(originpos, value) local originx, originy, originz = originpos.x, originpos.y, originpos.z local count = 0 local env = minetest.env local version = worldedit.valueversion(value) if version == 1 or version == 2 then --original flat table format --obtain the node table local get_tables = loadstring(value) if not get_tables then --error loading value return count end local tables = get_tables() --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 local nodes = tables[1] --load the node array count = #nodes if version == 1 then --original flat table format for index = 1, count do local entry = nodes[index] local pos = entry[1] pos.x, pos.y, pos.z = originx - pos.x, originy - pos.y, originz - pos.z env:add_node(pos, entry[2]) end else --previous meta flat table format for index = 1, #nodes do local entry = nodes[index] entry.x, entry.y, entry.z = originx + entry.x, originy + entry.y, originz + entry.z env:add_node(entry, entry) --entry acts both as position and as node env:get_meta(entry):from_table(entry.meta) end end elseif version == 3 then --previous list format local pos = {x=0, y=0, z=0} local node = {name="", param1=0, param2=0} for x, y, z, name, param1, param2 in value:gmatch("([+-]?%d+)%s+([+-]?%d+)%s+([+-]?%d+)%s+([^%s]+)%s+(%d+)%s+(%d+)[^\r\n]*[\r\n]*") do --match node entries pos.x = originx + tonumber(x) pos.y = originy + tonumber(y) pos.z = originz + tonumber(z) node.name = name node.param1 = param1 node.param2 = param2 env:add_node(pos, node) count = count + 1 end elseif version == 4 then --current nested table format local nodes = minetest.deserialize(value) count = #nodes for index = 1, count do local entry = nodes[index] entry.x, entry.y, entry.z = originx + entry.x, originy + entry.y, originz + entry.z env:add_node(entry, entry) --entry acts both as position and as node env:get_meta(entry):from_table(entry.meta) end end return count end