Cheat Engine

[PimpinRice]

I know, it's simple, it's HP in a singleplayer game. Basics of basics lol. But apparently I'm trying to up this and go the scripting route that I've learned from Step 9 from the Cheat Engine tutorials.

OK the problem/story

I found my HP, my allies and even enemies. Essentially all entities use the same write function to decrease their HP. So I've compared all of them in Data Structure form and try to look for Group Differences, sadly there were no group differences out of the base pointer list that I have. So I decided to go back bytes by bytes and eventually I landed on -5 on all addresses and found a group difference between mines and my allies and the enemies group. The only thing that puzzles me is.... How do I write a script that goes back -5 bytes in this situation and then proceeds to follow through with the compare and then the decrease?

My code (which sadly don't work)

[++METHOS]

You are wanting to compare edi-5, right? If so:

[PimpinRice]

Hmmm, actually the function that pops up when HP takes a hit from either sides is

[++METHOS]

1. If the original instruction is:

[PimpinRice]

The problem isn't going to the original base of -C0, I've already indicated I've done that, the problem is how do I make a script that implements the start at base pointer with a -5 into a compare at offset A0.

[++METHOS]

You haven't indicated anything clearly. Your base address is:

address-0C

If your address for health is:
11110000

and the instruction is:
fstp dword ptr [edi+000000C0]

Then your base address for your health structure is:
1110FF40

In dissection window, you can use:
11110000-0C
or
1110FF40

...they are the same thing.

If what you need to compare is actually at
1110FF40-05

Then all you need to do is write it out like so:
[edi-05]

Because [edi] contains the value at your base address.

[PimpinRice]

Oh my gawd... Sigh you still don't get it.

[++METHOS]

I am trying to help you. This will go nowhere unless you provide more details.

[PimpinRice]

I'm not convinced how?

[Rydian]

Just because you don't understand his advice doesn't mean it's not valid.

edi+000000C0 is the health for all entities, correct? So EDI is the base address of the entity structure, and +C0 (plus C0) bytes from the start of the base is where the health is. (Extra 0's at the beginning don't matter, 0000000010 is the same as 10 for logical purposes.)

The question is what the -5 is from. That's (minus 5). Well... what minus 5? Is the -5 from EDI, or is the -5 from the health address (which is EDI plus C0)?

If you don't know, then give us an example of the addresses. Show us the health address of one entity at a given time, then show us the address of the "-5" thing of that same entity at the same time so we can see what's up.

[ParkourPenguin]

I'm not sure you understand what a base pointer is. Do you mean the base of the structure? If so, then I don't know why in the hell you're trying to jump to memory that's not meant to be executed (regardless if it's executable or not). Just compare it with whatever like Methos said.

You really aren't indicating anything clearly. More information will be helpful (i.e. an image of whatever you mean by that minus 5). Here's some definitions that might be of use to you, in case you're confused:
Instruction - an operation the computer performs (i.e. mov, cmp, jmp).
Pointer - An address that stores the value of another address.
Multilevel Pointer - A pointer that points to another pointer that points to another...
Base Pointer - The address of the first pointer in a multilevel pointer.
Structure - a section of memory that stores values related to each other.
Base of the Structure - the address where the structure begins.

[PimpinRice]

OK let me try this, again, in steps formation so you guys can probably envision what happened.

1. I scan for my health address
2. I have my health address
3. I click what writes to my health address
4. fstp dword ptr [edi+000000C0] pops up as the instruction
5. I browse that inside the memory viewer
6. I click "find out what addresses this instruction accesses"
7. I went back inside the game to take some hits back and forth
8. I have all my allies and enemies dynamic HP addresses
9. I select all of the addresses inside that window
10. I press CTRL+D to put them into the Data Tree
11. I Notice Cheat Engine already puts them at base level by getting rid of C0
12. I organized them into 2 groups
13. I try to find a consistent value that differentiates me and allies against enemies
14. I can't find shit
15. I put -1 next the all the base addresses that is on the Data Tree inputs. No results
16. I put -2 next the all the base addresses that is on the Data Tree inputs. No results
17. I put -3 next the all the base addresses that is on the Data Tree inputs. No results
18. I put -4 next the all the base addresses that is on the Data Tree inputs. No results
19. I put -5 next the all the base addresses that is on the Data Tree inputs. Results!
20. I turn off my computer
21. I got off my chair
22. I went and cook some ramen in the kitchen
23. I walk through my hallway to turn on the heater
24. I walk all the way back inside my cave
25. I booted up my computer
26. I sat there and waited
27. I booted up the game after waiting
28. I boot up Cheat Engine
29. I rinse and repeat 1 - 19 again
30. I realize the offset of A0 from the base pointer holds the consistent result that I want from the -5 address instead
31. I have everything down
32. I realize the original base pointer, without the -5, at offset A0 isn't showing the consistent value that I want
32. I think the only way for me to compare at A0 inside the script is to take the base pointer and -5 from it
33. I looked almost everywhere, I cannot find any tutorials on tackling this specific situation on creating a script in Cheat Engine
34. I attempted to do some scripting
35. I put jmp [edi-5] first before the cmp function in hopes of it going back -5 from the original base level and in hopes of it using the base pointer of the -5 address instead of the original that doesn't show the consistent value
36. I've written the script I've posted above
37. ....My game crashes when an entity within the game loses HP or spawns
38. I lost hope
39. I thought for a second, I realize there was the forum for Cheat Engine
40. I browsed to this section
41. I created a topic for my situation
42. I got a quick response, thinking it would be an easy solution from some experienced users
43. I thought wrong
44. I got a guy who's telling me that I'm still stuck at steps 10 - 11 and that, that is the problem that I'm having
44. Perhaps he didn't fully understand it, I repeated my problem.
45. Escalates by blaming me for not understanding my situation, the nerves
46. Can't tell if trolling or not
47. Fin!

Time to address some remarks

[ParkourPenguin]

19: Then just do what Methos said in the first reply to this thread.

[PimpinRice]

I'm actually very close to knowing what I'm talking about, that's why I was able to repeat the process 4 times without struggling. But on the other hand, you guys..... It's another story. But yeap still blaming me though, I don't mind.


I'mma try that code, even though I know it won't work because I'm not asking to compare edi-5 at all but rather the compare of A0 from edi-5, explained the 5th time and I'mma come back over here screeching like you've never heard before for wasting my time.

[++METHOS]