//maze, //maze3d: Allow non-number seeds

This uses a simple (non-crypto!) hash function to hash non-number 
strings to a number. Existing seeds are *not* affected - they will still 
work as before.
This commit is contained in:
Starbeamrainbowlabs 2020-09-28 01:31:15 +01:00
parent 39103a046f
commit fea89f2e3c
Signed by: sbrl
GPG key ID: 1BE5172E637709C2
2 changed files with 20 additions and 4 deletions

View file

@ -268,3 +268,22 @@ function worldeditadditions.human_time(ms)
end
end
end
--- Makes a seed from a string.
-- If the input is a number, it is returned as-is.
-- If the input is a string and can be converted to a number with tonumber(),
-- the output of tonumber() is returned.
-- Otherwise, the string is converted to a number via a simple hashing algorithm
-- (caution: certainlly NOT crypto-secure!).
-- @param {string} str The string to convert.
-- @source https://stackoverflow.com/a/2624210/1460422 The idea came from here
function worldeditadditions.makeseed(str)
if type(str) == "number" then return str end
if tonumber(str) ~= nil then return tonumber(str) end
local result = 0
for i = 1, #str do
result = (result*91) + (string.byte(str:sub(i, i)) * 31)
end
return result
end

View file

@ -27,10 +27,7 @@ local function parse_params_maze(params_text, is_3d)
path_depth = tonumber(parts[4])
end
if #parts >= param_index_seed then
seed = tonumber(parts[param_index_seed])
if not seed then
return false, "Error: Invalid seed value (seeds may only be integers)."
end
seed = worldeditadditions.makeseed(parts[param_index_seed])
end
replace_node = worldedit.normalize_nodename(replace_node)