Cheat Engine Forum Index Cheat Engine
The Official Site of Cheat Engine
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 


aobscan Nth result

 
Post new topic   Reply to topic    Cheat Engine Forum Index -> Cheat Engine Extensions
View previous topic :: View next topic  
Author Message
mgr.inz.Player
I post too much
Reputation: 164

Joined: 07 Nov 2008
Posts: 4421
Location: W kraju nad Wisla. UTC+01:00

PostPosted: Mon Oct 21, 2019 7:30 am    Post subject: aobscan Nth result Reply with quote

Installation:
Add below function to autorun folder to existing or new .lua file
You can also copy it to main memory record (AA script with {$Lua} section).

Code:
function find_Nth_Result_AOB(symbol,N,start,pattern)
  if start==' 00000000' then return end
  if N<=1 then registerSymbol(symbol,start) return end
  local script='aobscanregion('..symbol..','..start..'+1,7fffffffffffffff,'..pattern..')\r\nregistersymbol('..symbol..')'
  local success=autoAssemble(script)
  if success and (N>2) then find_Nth_Result_AOB(symbol,N-1,string.format('%08X',getAddress(symbol)),pattern) end
  if not success then unregisterSymbol(symbol); error() end
end


Usage:

Example, if you need second result just use this AA script:
Code:
[ENABLE]
aobscan(myPtr,48 8b 05 * * * * 48 85 c0 0f 85)
LuaCall(find_Nth_Result_AOB('myPtr',2,[=[myPtr]=],"48 8b 05 * * * * 48 85 c0 0f 85"))
...
...
...

[DISABLE]
unregistersymbol(myPtr)
...
...
...



if you need third result from module:
Code:
[ENABLE]
aobscanmodule(myPtr,modulename,48 8b 05 * * * * 48 85 c0 0f 85)
LuaCall(find_Nth_Result_AOB('myPtr',3,[=[myPtr]=],"48 8b 05 * * * * 48 85 c0 0f 85"))
...
...
...

[DISABLE]
unregistersymbol(myPtr)
...
...
...



Tip:
Be sure to check "execute asynchronous"







Notes:
You probably notice this [=[myPtr]=] thing in my code. Everything inside parenthesis of LuaCall is executed by Lua. And Lua treats [=[ and ]=] more or less the same way as quotation marks "

_________________
Back to top
View user's profile Send private message MSN Messenger
Csimbi
I post too much
Reputation: 72

Joined: 14 Jul 2007
Posts: 2372

PostPosted: Wed Nov 20, 2019 8:37 am    Post subject: Reply with quote

This would have been useful in the past, now I can't recall which game it was anymore.
I'll take a mental note that this problem has also been solved and come back for it later.
Back to top
View user's profile Send private message
Csimbi
I post too much
Reputation: 72

Joined: 14 Jul 2007
Posts: 2372

PostPosted: Sat Dec 14, 2019 6:42 pm    Post subject: Reply with quote

As it happens, there is a game where I could use this.
Any chance to add a second variant that supports aobscanmodule?
Code:
aobscanmodule(myPtr,process.exe,48 8b 05 * * * * 48 85 c0 0f 85)


I tried stealing your code to do this myself, but I keep getting an error when I try to enable the script (unknown LUA error).

Also, I guess the start address is no longer needed, but I get an error when I replace start with moduleAddress.

Thank you!



FindNthAOBResult.lua
 Description:

Download
 Filename:  FindNthAOBResult.lua
 Filesize:  2.05 KB
 Downloaded:  496 Time(s)

Back to top
View user's profile Send private message
mgr.inz.Player
I post too much
Reputation: 164

Joined: 07 Nov 2008
Posts: 4421
Location: W kraju nad Wisla. UTC+01:00

PostPosted: Sun Dec 15, 2019 6:56 am    Post subject: Reply with quote

It already works with aobscanmodule and aobscanregion.


Code:
[ENABLE]
whatever_build-in_aob_scan_method(symbolName, [[modulename,] | [startaddress, endaddress,]] ThePattern)
LuaCall(find_Nth_Result_AOB('symbolName',ResultsIndex,[=[symbolName]=],"ThePattern"))
...
...
...

[DISABLE]
unregistersymbol(symbolName)
...
...
...


You do not like the 7fffffffffffffff part of my script?
You probably want the most efficient value right? OK. Here's how:

Do array of byte scan:
1. in main CE window
2. inside "memory scan options" choose the module from combobox
3. right click on any "memory scan options" checkbox and choose: "preset: scan all memory" (autoassemble aobscan also do this)
4. run this code
Code:
iwantthisresultindex = 3 -- third result
redundancy = 0.05 -- increase max distance by 5% to get optimal

memscan = getCurrentMemscan()
maxdistance = 0
for i=2, iwantthisresultindex do
  address1 = tonumber(memscan.FoundList[i-2],16)
  address2 = tonumber(memscan.FoundList[i-1],16)
  distance = address2-address1
  print(string.format("distance: %X",distance))
  if maxdistance<distance then maxdistance=distance end
end
print(string.format("max distance is: %X", maxdistance))
print(string.format("optimal distance is: %X", (maxdistance*(redundancy+1))//1 ))


And you got, for example, optimal distance: 1234

then change line:
Code:
  local script='aobscanregion('..symbol..','..start..'+1,7fffffffffffffff,'..pattern..')\r\nregistersymbol('..symbol..')'

to
Code:
  local script='aobscanregion('..symbol..','..start..'+1,'..start..'+1234,'..pattern..')\r\nregistersymbol('..symbol..')'


edit: a typo.

_________________


Last edited by mgr.inz.Player on Sun Dec 15, 2019 10:41 am; edited 1 time in total
Back to top
View user's profile Send private message MSN Messenger
Csimbi
I post too much
Reputation: 72

Joined: 14 Jul 2007
Posts: 2372

PostPosted: Sun Dec 15, 2019 9:18 am    Post subject: Reply with quote

mgr.inz.Player wrote:
It already works with aobscanmodule and aobscanregion.

Oh. Ignore my nonsense then, thanks!
Good tips right there thought, thanks!

The end address does not matter - I just want the second and I know there'll be one "fairly soon".

But the thing is, I want use both the first and the second Wink

Edit.
No error, but both symbols point to the same address (the first: Weapon):
Code:
aobscanmodule(aobWeaponCountReader,MechWarrior-Win64-Shipping.exe,8B ...)
aobscanmodule(aobEquipmentCountReader,MechWarrior-Win64-Shipping.exe,8B ...)
LuaCall(find_Nth_Result_AOB('aobEquipmentCountReader',2,[=[aobEquipmentCountReader]=],"8B ..."))


I would expect this to happen:
1. CE searches for aobWeaponCountReader and it takes address.
2. CE searches for aobEquipmentCountReader and it takes address (same AOB as Weapon, so same address).
3. find_Nth_Result_AOB bumps aobEquipmentCountReader to the address where the signature is found the second time.

But, instead I got:
- aobEquipmentCountReader has address of the 2nd AOB signature (correct).
- aobWeaponCountReader_r and aobEquipmentCountReader_r are equal, they both have address of the 1st AOB signature.

Here are the hooks, based on these the _r symbols should be different:
Code:

...
aobWeaponCountReader:
aobWeaponCountReader_r:
jmp lblWeaponCountReader
nop 2
lblWeaponCountReaderRet:

aobEquipmentCountReader:
aobEquipmentCountReader_r:
...


Edit2
Ok, figured it out.
The first symbol I pass in LUACall must be different from the one in the AA template. I.e.

Code:
aobscanmodule(aobWeaponCountReader,MechWarrior-Win64-Shipping.exe,8B ...)
aobscanmodule(aobEquipmentCountReader,MechWarrior-Win64-Shipping.exe,8B ...)
LuaCall(find_Nth_Result_AOB('aobEquipmentCountReader1',2,[=[aobEquipmentCountReader]=],"8B ..."))

and
Code:
aobWeaponCountReader:
aobWeaponCountReader_r:
jmp lblWeaponCountReader
nop 2
lblWeaponCountReaderRet:

aobEquipmentCountReader1:
aobEquipmentCountReader_r:


Even better:
Code:
aobscanmodule(aobWeaponCountReader,MechWarrior-Win64-Shipping.exe,8B ...)
LuaCall(find_Nth_Result_AOB('aobEquipmentCountReader',2,[=[aobWeaponCountReader]=],"8B ..."))
Back to top
View user's profile Send private message
mgr.inz.Player
I post too much
Reputation: 164

Joined: 07 Nov 2008
Posts: 4421
Location: W kraju nad Wisla. UTC+01:00

PostPosted: Sun Dec 15, 2019 10:01 am    Post subject: Reply with quote

Yes, aobscans are replaced with defines.

So this
Code:
aobscanmodule(aobWeaponCountReader,MechWarrior-Win64-Shipping.exe,8B ...)
aobscanmodule(aobEquipmentCountReader,MechWarrior-Win64-Shipping.exe,8B ...)
LuaCall(find_Nth_Result_AOB('aobEquipmentCountReader1',2,[=[aobEquipmentCountReader]=],"8B ..."))


Will become:
Code:
define(aobWeaponCountReader, address1)
define(aobEquipmentCountReader, address2)


aobEquipmentCountReader1 will be added to symbolhandler.


I thought you will have only aobscans in main script. Yes, if you want "all-in-one" main script, you have to use different name for registered symbol if you do not want it to be concealed by defined word.

By the way, if you have the same pattern. You can use only one aobscan:
Code:
aobscanmodule(aobWeaponCountReader,MechWarrior-Win64-Shipping.exe,8B ...)

LuaCall(find_Nth_Result_AOB('aobEquipmentCountReader',2,[=[aobWeaponCountReader]=],"8B ..."))
LuaCall(find_Nth_Result_AOB('aobWhateverCountReader',3,[=[aobWeaponCountReader]=],"8B ..."))






By the way. You can use different pattern for find_Nth_Result_AOB, if you know it is after the first pattern. Keep in mind to use correct N value.

e.g. first occurrence of pattern2 after pattern1, (N = first + 1 = 2)
Code:
aobscan(name1, pattern1)
LuaCall(find_Nth_Result_AOB('name2',2,[=[name1]=],"pattern2"))


e.g. third occurrence of pattern2 after pattern1, (N = third + 1 = 4)
Code:
aobscan(name1, pattern1)
LuaCall(find_Nth_Result_AOB('name2',4,[=[name1]=],"pattern2"))

_________________


Last edited by mgr.inz.Player on Sun Feb 09, 2020 1:15 pm; edited 1 time in total
Back to top
View user's profile Send private message MSN Messenger
jgoemat
Expert Cheater
Reputation: 21

Joined: 25 Sep 2011
Posts: 238

PostPosted: Fri Jan 31, 2020 3:08 am    Post subject: Reply with quote

I think it would be handy to have something that could take a series of AOBs and find the address of the first where the next several were close by...
Back to top
View user's profile Send private message
Csimbi
I post too much
Reputation: 72

Joined: 14 Jul 2007
Posts: 2372

PostPosted: Fri Jan 31, 2020 6:09 am    Post subject: Reply with quote

jgoemat wrote:
I think it would be handy to have something that could take a series of AOBs and find the address of the first where the next several were close by...

Well, that's sort of what this does: you scan once and continue scanning from there (or any other AOB scan you did before).
You just need to chain them up.
Back to top
View user's profile Send private message
maskelihileci
Newbie cheater
Reputation: 0

Joined: 08 Oct 2016
Posts: 22

PostPosted: Sun Feb 09, 2020 12:43 pm    Post subject: There is a problem Reply with quote

Code:


aobscan(myPtr,8b 10 8b 48)
LuaCall(find_Nth_Result_AOB('myPtr',3,[=[myPtr]=],"8b 10 8b 48"))


myPtr:
db C3




I do it this way, organizes the first one
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Cheat Engine Forum Index -> Cheat Engine Extensions All times are GMT - 6 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group

CE Wiki   IRC (#CEF)   Twitter
Third party websites