Cheat Engine

vng21092 · Posted: Thu Oct 08, 2015 7:10 pm Post subject: Just LUA Questions

Hey guys, just a quick question. Does LUA have an equivalent of aobScanModule? If so, whats the syntax? Thanks.

Zanzer · Posted: Thu Oct 08, 2015 8:07 pm Post subject:

vng21092 · Posted: Thu Oct 08, 2015 8:30 pm Post subject:

...wow that's a lot to take in, thanks. Just out of curiosity I was just reading up one of DBs older posts about aobscan where an array was returned. Near the end of the code he wrote

atom0s · Posted: Thu Oct 08, 2015 11:20 pm Post subject:

Destroy cleans up the object on the Delphi side. Given that everything Cheat Engine exposes to Lua is just wrapped objects from Delphi, they need to be cleaned up in certain cases.

Setting to nil is more or less just cleanup code to ensure the object is not attempted to be used again. More or less garbage collection in a sense. It isn't needed once destroy is used, the object is already cleaned up at that point on the Delphi side.

panraven · Posted: Fri Oct 09, 2015 3:47 am Post subject:

The 'nil' is necessary in some case I guess. It may cause 'access violation' in some case if not.

vng21092 · Posted: Fri Oct 09, 2015 7:39 am Post subject:

ahh gotcha, thanks guys. Another question (sorry, trying to learn LUA), it seems that every time I edit a asm script with a luaCall in it, whenever I press "OK" the LUA part gets executed, is there anyway to stop that from happening? If I hit assign to cheat table the script doesn't get executed but when I edit it, it does.

Dark Byte · Posted: Fri Oct 09, 2015 7:53 am Post subject:

Hmm, that's weird as luacall should also execute on assign to cheat table

Anyhow, I recommend you use this kind of code instead:

vng21092 · Posted: Fri Oct 09, 2015 9:12 am Post subject:

hmm thanks DB that worked, but then I tried implementing this WITHIN the lua script itself but I guess it doesn't work that way?

Zanzer · Posted: Fri Oct 09, 2015 11:12 am Post subject:

That code is only preventing the function's code from running during script creation/update.
The rest of your Lua is still running. Maybe try something like:

vng21092 · Posted: Sat Oct 10, 2015 8:41 pm Post subject:

does ASM have any methods that can read the data off a LUA variable?

Zanzer · Posted: Sat Oct 10, 2015 9:01 pm Post subject:

Dark Byte · Posted: Sun Oct 11, 2015 1:14 am Post subject:

registersymbol, and i think $globalluavar, but that one is ambiguous to use (difficult to predict if it's going to get handled as an hex, int or string)

also, the return value of lua sections will be interpreted as an autoassembler command (or multiple if you return a string with muktiple lines)
you can do something like: