Cheat Engine

DrGamut · Newbie cheater Reputation: 0 Joined: 14 Feb 2006 Posts: 10

So this might be the place to ask. As part of a school project I wanted to write a program to demonstrate exploitation of video games to gain advantage. I thought I would write a DirectX hook aimbot for a sample game.

I loaded the game in Microsoft PIX from the DX SDK and captured the render of a particular frame. I isolated the call that draws the mesh I would like to target, it looks like this in PIX: <0x078A0268> IDirect3DDevice9::DrawIndexedPrimitive(D3DPT_TRIANGLELIST, 0, 712, 2306, 3774, 3974)

I can check the vertex buffer that was last set with SetStreamSource and find the xyz coordinates of the vertices in the mesh, but they all seem relative to each other. What I want to know is the coordinates of the vertices or center of the mesh within the viewport. How can I find or calculate these?

I have little (read, none) experience with computer graphics. So I apologize if my question is dumb.

vnlagrla · Cheater Reputation: 0 Joined: 10 Apr 2011 Posts: 33

you don't really need to know much about graphics
http://www.oldschoolhack.de/tutorials/World%20of%20Game%20Hacking%20-%20The%20Home%20of%20CES%20-%20aimbot%20Tutorial!.html
^Add !.html

You get enemy xyz, your xyz, your h and v looks, and you use trigonometry to find out where your h and v look needs to be to aim at the enemy from your position. I have a few questions. what language are you writing it in?
when is this project due.

Dark Byte · Posted: Sat Jun 02, 2012 7:41 pm Post subject:

That method makes use of knowledge about the internal game mechanics like player position, speed, etc...
The topic starter wants to specifically show the flaw in dx9 and earlier (dx10+ won't work this way)

Anyhow check http://code.google.com/p/cheat-engine/source/browse/branches/Cheat%20Engine%20Old/DirectXHook/directx9hook.pas

It watches all render commands and when a specific texture is being rendered (e.g the head texture) it uses the world, view and projection matrixes to get the point on the screen (you can't get those in dx10+ without experimenting with buffers)
D3DXVec3Project
Example: http://code.google.com/p/cheat-engine/source/browse/branches/Cheat%20Engine%20Old/DirectXHook/directx9hook.pas#1802

Then it watches 3 or more frames to see distance in pixels change. Then it extrapolates that to predict where the next point on the screen will be.
It then calculates how much the mouse has to move to bring that point to the center of the screen and then issues the mouse move command to do that, followed by an optional left mouse click

DrGamut · Newbie cheater Reputation: 0 Joined: 14 Feb 2006 Posts: 10