diff options
Diffstat (limited to 'worldedit/serialization.lua')
| -rw-r--r-- | worldedit/serialization.lua | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/worldedit/serialization.lua b/worldedit/serialization.lua new file mode 100644 index 0000000..ae095eb --- /dev/null +++ b/worldedit/serialization.lua @@ -0,0 +1,160 @@ +worldedit = worldedit or {}
+
+dofile(minetest.get_modpath("worldedit") .. "/table_save.lua") --wip: remove dependency
+
+--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
+
+--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)
+ 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
+ result[count] = pos.x - pos1.x .. " " .. pos.y - pos1.y .. " " .. pos.z - pos1.z .. " " .. node.name .. " " .. node.param1 .. " " .. node.param2
+ end
+ pos.z = pos.z + 1
+ end
+ pos.y = pos.y + 1
+ end
+ pos.x = pos.x + 1
+ end
+ result = table.concat(result, "\n") --join all node entries into single string
+ return result, count
+end
+
+--loads the nodes represented by string `value` at position `originpos`, returning the number of nodes deserialized
+worldedit.deserialize = function(originpos, value)
+ local pos = {x=0, y=0, z=0}
+ local node = {name="", param1=0, param2=0}
+ local count = 0
+ local env = minetest.env
+ 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 = originpos.x + tonumber(x)
+ pos.y = originpos.y + tonumber(y)
+ pos.z = originpos.z + tonumber(z)
+ node.name = name
+ node.param1 = param1
+ node.param2 = param2
+ env:add_node(pos, node)
+ count = count + 1
+ end
+ return count
+end
+
+--loads the nodes represented by string `value` at position `originpos`, returning the number of nodes deserialized
+--based on [table.save/table.load](http://lua-users.org/wiki/SaveTableToFile) by ChillCode, available under the MIT license (GPL compatible)
+worldedit.deserialize_old = function(originpos, value)
+ --obtain the node table
+ local count = 0
+ local get_tables = loadstring(value)
+ if get_tables == nil 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
+
+ --load the node array
+ local env = minetest.env
+ for i, v in ipairs(tables[1]) do
+ local pos = v[1]
+ pos.x, pos.y, pos.z = originpos.x + pos.x, originpos.y + pos.y, originpos.z + pos.z
+ env:add_node(pos, v[2])
+ count = count + 1
+ 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) --wip: simply work with strings instead of doing IO
+ 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) --wip: simply work with strings instead of doing IO
+ 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 |