FOSS gamedev and creative worlds

Posted: **Tue Oct 28, 2014 14:38**

Hi guys,

I can't figure out how to use the datastorage mod based on the README:

https://github.com/minetest-technic/datastorage

All I need to know for now is how to save a value so that I can access it after quitting and restarting the game.

Thanks :)

Posted: **Wed Oct 29, 2014 02:05**

i would recomend you using my datastorage mod instead, its more easier
viewtopic.php?f=9&t=9276

Posted: **Wed Oct 29, 2014 11:31**

Thanks Addi, I actually found your mod yesterday but I'll try it out later today :)

Posted: **Wed Oct 29, 2014 11:47**

You don't have to use a mod, you can do it yourself like this:

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all: local data = {} local data_filename = minetest.get_worldpath().."/filename.txt" local function load_data() local file = io.open(data_filename, "r") if file then local table = minetest.deserialize(file:read("*all")) file:close() if type(table) == "table" then data = table return end end end local function save_data() local file = io.open(data_filename, "w") if file then file:write(minetest.serialize(data)) file:close() end end load_data()

Posted: **Wed Oct 29, 2014 16:50**

Thanks Ruben, that would be ideal if I could do it without using a mod. Could you give me a few pointers for how to get this to work? I have an integer variable called "gold" that stores how many points the character has. I've pasted in your code and made it so when the amount of gold changes it runs save_data(). Nothing seems to be being saved though and in the text file (I've called it datastorage.txt) all I can see is:

return { }

Posted: **Wed Oct 29, 2014 17:39**

Try this:

Your phone or window isn't wide enough to display the code box. If it's a phone, try rotating it to landscape mode.

Code: Select all: local function load_data(filename) local file = io.open(filename, "r") if file then local table = minetest.deserialize(file:read("*all")) file:close() if type(table) == "table" then return table end end end local function save_data(filename, data) local file = io.open(filename, "w") if file then file:write(minetest.serialize(data)) file:close() end end local mydata = load_data(minetest.get_worldpath().."/filename.txt") or {} -- loads file if it exists, or makes empty table mydata.foo = "bar" save_data(minetest.get_worldpath().."/filename.txt", mydata)

Posted: **Wed Oct 29, 2014 22:03**

That's working, thanks a lot! I'm making a mod for my students to learn about adding fractions so they'll be very happy :)

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