mirror of
https://github.com/sbrl/Minetest-WorldEditAdditions.git
synced 2024-12-23 20:15:02 +00:00
63 lines
2.5 KiB
Lua
63 lines
2.5 KiB
Lua
|
|
--- Parses a list of strings as a list of weighted nodes - e.g. like in
|
|
-- the //mix command. Example: "dirt 5 stone sand 2".
|
|
-- @param parts string[] The list of strings to parse (try worldeditadditions.split)
|
|
-- @param as_list bool If true, then table.insert() successive { node = string, weight = number } subtables when parsing instead of populating as an associative array.
|
|
-- @param func_normalise callable If specified, the given function will be used to normalise node names instead of worldedit.normalize_nodename. A single argument is passed containing the un-normalised node name, and the return value is assumed to be the normalised node name.
|
|
-- @returns table A table in the form node_name => weight.
|
|
function worldeditadditions.parse.weighted_nodes(parts, as_list, func_normalise)
|
|
if as_list == nil then as_list = false end
|
|
local MODE_EITHER = 1
|
|
local MODE_NODE = 2
|
|
|
|
local result = {}
|
|
local mode = MODE_NODE
|
|
local last_node_name = nil
|
|
for i, part in ipairs(parts) do
|
|
-- print("i: "..i..", part: "..part)
|
|
if mode == MODE_NODE then
|
|
-- print("mode: node");
|
|
local next
|
|
if not func_normalise then next = worldedit.normalize_nodename(part)
|
|
else next = func_normalise(part) end
|
|
if not next then
|
|
return false, "Error: Invalid node name '"..part.."'"
|
|
end
|
|
last_node_name = next
|
|
mode = MODE_EITHER
|
|
elseif mode == MODE_EITHER then
|
|
-- print("mode: either");
|
|
local chance = worldeditadditions.parse.chance(part, "weight")
|
|
if not chance then
|
|
-- print("not a chance, trying a node name")
|
|
local node_name
|
|
if not func_normalise then node_name = worldedit.normalize_nodename(part)
|
|
else node_name = func_normalise(part) end
|
|
|
|
if not node_name then
|
|
return false, "Error: Invalid number '"..tostring(part).."'"
|
|
end
|
|
if last_node_name then
|
|
if as_list then table.insert(result, { node = last_node_name, weight = 1 })
|
|
else result[last_node_name] = 1 end
|
|
end
|
|
last_node_name = node_name
|
|
mode = MODE_EITHER
|
|
else
|
|
-- print("it's a chance: ", chance, "for", last_node_name)
|
|
chance = math.floor(chance)
|
|
if as_list then table.insert(result, { node = last_node_name, weight = chance })
|
|
else result[last_node_name] = chance end
|
|
last_node_name = nil
|
|
mode = MODE_NODE
|
|
end
|
|
end
|
|
end
|
|
if last_node_name then
|
|
-- print("caught trailing node name: ", last_node_name)
|
|
if as_list then table.insert(result, { node = last_node_name, weight = 1 })
|
|
else result[last_node_name] = 1 end
|
|
end
|
|
|
|
return true, result
|
|
end
|