Unique chunk ID
Posted: Wed Dec 11, 2024 8:29 pm
I hope this is the right place...
This is a helper method for all modders who store positional data. Instead of having a storage table, which is bad programming and nil-checking, there is something better.
2D positions are a countable set which means you can assign each {x, y} element a natural number. I wrote a spiral function for that in LUA, based on https://web.archive.org/web/20141202041 ... miserably/:
Just give a position (tile or chunk) and a unique ID you get!
This is a helper method for all modders who store positional data. Instead of having a storage table
Code: Select all
{ [x] = { [y] = {..., ...} }2D positions are a countable set which means you can assign each {x, y} element a natural number. I wrote a spiral function for that in LUA, based on https://web.archive.org/web/20141202041 ... miserably/:
Code: Select all
function spiral(pos)
local x = math.abs( {table.unpack(pos)}[1])
local y = math.abs( {table.unpack(pos)}[2])
local a = math.max(x, y)
local dist = 0
local i = 0
while y > x or y >= -x do -- rotate by 90° (multiply by -j) until values are in the top triangle
p = {-y, x}
dist = dist + 2*a
i = i + 1
if i == 5 then break end
end
dist = dist + a - x
return dist + ((a*2)-1)^2
end