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Trouble finding functions

 
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aeree
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Joined: 23 Jan 2010
Posts: 42
Location: Germany

PostPosted: Sat Sep 07, 2013 10:19 am    Post subject: Trouble finding functions Reply with quote

I wanted to make an autojump hack for Counter Strike Source in auto assembler. What I planned was when i press and hold a key the jump function would be constantly called. But I have no clue how to find that function.

What I tried was to find values which indicate if the player is midair. Then I tried to find what accesses/writes to this address but I didn't really know what to look for when stepping through the code.

Is there a general method to find functions like that?

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daspamer
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Posts: 1588

PostPosted: Sat Sep 07, 2013 11:40 am    Post subject: Reply with quote

You can use cheat engine LUA, and use one of these two scripts, they're very simple, you can improve them to fit your needs.

Or try Ultimap and ignore the scripts below.
(Video http://www.youtube.com/watch?v=T5sXoEEPFBQ)

Jumps nonstop when two keys are pressed (Shift and space)
Code:
-- Jump while these two keys are pressed, so you don't need to double tap on space again..
-- you can also remove the isKeyPressed(VK_SHIFT) and to achieve it.
t = createTimer(nil,false);
t.OnTimer = function ()
            if (isKeyPressed(VK_SHIFT) and isKeyPressed(VK_SPACE)) then
               doKeyPress(VK_SPACE);
            end
         end
t.Interval = 100;
t.Enabled = true;


Jumps nonstop when activated or deactivated (Shift and space to enable, Ctrl and space to disable)

Code:
-- Keep jumping nonestop without pressing.
-- Shift + Space = Activate the constant jump
-- Ctrl + Space = Deactivate the constant jump
t = createTimer(nil,false);
t.OnTimer = function ()
            if (isKeyPressed(VK_SHIFT) and isKeyPressed(VK_SPACE)) and not Auto then
               Auto = true
            elseif (isKeyPressed(VK_CONTROL) and isKeyPressed(VK_SPACE))  and Auto then
               Auto = false
               -- t.destroy(); -- Destroys the timer.
            elseif not (isKeyPressed(VK_SHIFT) and isKeyPressed(VK_SPACE)) and Auto then
               doKeyPress(VK_SPACE);
            end
            -- print(tostring(Auto)); -- Print to string the current value of Auto (true , false).
         end
t.Interval = 100;
t.Enabled = true;

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aeree
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Joined: 23 Jan 2010
Posts: 42
Location: Germany

PostPosted: Sat Sep 07, 2013 12:15 pm    Post subject: Reply with quote

DaSpamer wrote:
You can use cheat engine LUA, and use one of these two scripts, they're very simple, you can improve them to fit your needs.

Or try Ultimap and ignore the scripts below.
(Video ###############################)

Jumps nonstop when two keys are pressed (Shift and space)
Code:
-- Jump while these two keys are pressed, so you don't need to double tap on space again..
-- you can also remove the isKeyPressed(VK_SHIFT) and to achieve it.
t = createTimer(nil,false);
t.OnTimer = function ()
            if (isKeyPressed(VK_SHIFT) and isKeyPressed(VK_SPACE)) then
               doKeyPress(VK_SPACE);
            end
         end
t.Interval = 100;
t.Enabled = true;


Jumps nonstop when activated or deactivated (Shift and space to enable, Ctrl and space to disable)

Code:
-- Keep jumping nonestop without pressing.
-- Shift + Space = Activate the constant jump
-- Ctrl + Space = Deactivate the constant jump
t = createTimer(nil,false);
t.OnTimer = function ()
            if (isKeyPressed(VK_SHIFT) and isKeyPressed(VK_SPACE)) and not Auto then
               Auto = true
            elseif (isKeyPressed(VK_CONTROL) and isKeyPressed(VK_SPACE))  and Auto then
               Auto = false
               -- t.destroy(); -- Destroys the timer.
            elseif not (isKeyPressed(VK_SHIFT) and isKeyPressed(VK_SPACE)) and Auto then
               doKeyPress(VK_SPACE);
            end
            -- print(tostring(Auto)); -- Print to string the current value of Auto (true , false).
         end
t.Interval = 100;
t.Enabled = true;




Thanks for the reply but the point wasn't the autojump itself. It was more about methods to find functions in games. Also I think Ultimap requires an Intel Processor which i don't own.

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daspamer
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Reputation: 54

Joined: 13 Sep 2011
Posts: 1588

PostPosted: Sat Sep 07, 2013 12:24 pm    Post subject: Reply with quote

fishbone105 wrote:
DaSpamer wrote:
You can use cheat engine LUA, and use one of these two scripts, they're very simple, you can improve them to fit your needs.

Or try Ultimap and ignore the scripts below.
(Video ###############################)

Jumps nonstop when two keys are pressed (Shift and space)
Code:
-- Jump while these two keys are pressed, so you don't need to double tap on space again..
-- you can also remove the isKeyPressed(VK_SHIFT) and to achieve it.
t = createTimer(nil,false);
t.OnTimer = function ()
            if (isKeyPressed(VK_SHIFT) and isKeyPressed(VK_SPACE)) then
               doKeyPress(VK_SPACE);
            end
         end
t.Interval = 100;
t.Enabled = true;


Jumps nonstop when activated or deactivated (Shift and space to enable, Ctrl and space to disable)

Code:
-- Keep jumping nonestop without pressing.
-- Shift + Space = Activate the constant jump
-- Ctrl + Space = Deactivate the constant jump
t = createTimer(nil,false);
t.OnTimer = function ()
            if (isKeyPressed(VK_SHIFT) and isKeyPressed(VK_SPACE)) and not Auto then
               Auto = true
            elseif (isKeyPressed(VK_CONTROL) and isKeyPressed(VK_SPACE))  and Auto then
               Auto = false
               -- t.destroy(); -- Destroys the timer.
            elseif not (isKeyPressed(VK_SHIFT) and isKeyPressed(VK_SPACE)) and Auto then
               doKeyPress(VK_SPACE);
            end
            -- print(tostring(Auto)); -- Print to string the current value of Auto (true , false).
         end
t.Interval = 100;
t.Enabled = true;




Thanks for the reply but the point wasn't the autojump itself. It was more about methods to find functions in games. Also I think Ultimap requires an Intel Processor which i don't own.


Yes ultimap requires Intel Process and VT (I had to enable it via BIOS).

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aeree
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Joined: 23 Jan 2010
Posts: 42
Location: Germany

PostPosted: Sat Sep 07, 2013 12:46 pm    Post subject: Reply with quote

DaSpamer wrote:

Yes ultimap requires Intel Process and VT (I had to enable it via BIOS).



Can you tell me how to properly use Break and Trace? I guess that would be the only alternative to Ultimap, right?

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++METHOS
I post too much
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Joined: 29 Oct 2010
Posts: 4197

PostPosted: Sat Sep 07, 2013 2:12 pm    Post subject: Reply with quote

My approach would involve finding the addresses that handle the buttons (or keys, if you are using a keyboard). By doing so, you can easily write a script that will execute when you want, automatically. You can set the script to have your character keep jumping automatically, forever, on a timer, or during key-press etc. By doing so, you can also dig deeper to find the instructions that actually handle the jumping animation and more - should you choose to do so...although, I do not typically dig that deep, as it is not necessary.

This sounds like a lazy man's taunt cheat. Very Happy
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Dark Byte
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Joined: 09 May 2003
Posts: 25819
Location: The netherlands

PostPosted: Sat Sep 07, 2013 2:15 pm    Post subject: Reply with quote

Perhaps you can find the height or height acceleration variable, and then find out what writes it
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