added metasave/metaload to api

1 files changed, 64 insertions, 0 deletions

diff --git a/functions.lua b/functions.lua
index fbdfb54..2d16daf 100644
--- a/functions.lua
+++ b/functions.lua
@@ -566,3 +566,67 @@ worldedit.deserialize_old = function(originpos, value)
 	end

 	return count

 end

+

+--saves the nodes and meta defined by positions `pos1` and `pos2` into a file, returning the number of nodes saved

+worldedit.metasave = function(pos1, pos2, file)

+	local path = minetest.get_worldpath() .. "/schems"

+	local filename = path .. "/" .. file .. ".wem"

+	os.execute("mkdir \"" .. path .. "\"") --create directory if it does not already exist

+	local rows = {}

+	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 row = {

+						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 = env:get_meta(pos):to_table(),

+					}

+					table.insert(rows, row)

+				end

+				pos.z = pos.z + 1

+			end

+			pos.y = pos.y + 1

+		end

+		pos.x = pos.x + 1

+	end

+	local err = table.save(rows,filename)

+	if err then return _,err end

+	return count

+end

+

+--loads the nodes and meta from `file` to position `pos1`, returning the number of nodes loaded

+worldedit.metaload = function(pos1, file)

+	local filename = minetest.get_worldpath() .. "/schems/" .. file .. ".wem"

+	local rows, err = table.load(filename)

+	if err then return _,err end

+	local pos = {x=0, y=0, z=0}

+	local node = {name="", param1=0, param2=0}

+	local count = 0

+	local env = minetest.env

+	for i,row in pairs(rows) do

+		pos.x = pos1.x + tonumber(row.x)

+		pos.y = pos1.y + tonumber(row.y)

+		pos.z = pos1.z + tonumber(row.z)

+		node.name = row.name

+		node.param1 = row.param1

+		node.param2 = row.param2

+		env:add_node(pos, node)

+		env:get_meta(pos):from_table(row.meta)

+		count = count + 1

+	end

+	return count

+end
\ No newline at end of file