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Fresco
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 Posted: Fri May 01, 2015 10:07 am Post subject: FPS - Fly Cheat Code (lua) |
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X can go from 0 to 0.5
Y can go from 0 to 90
when X is 0 Y must be 90
when X is 0.5 Y must be 0
How much is X when Y is Y_val ?
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... Fresco
Last edited by Fresco on Sun May 03, 2015 10:11 am; edited 1 time in total |
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Redouane
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| Posted: Fri May 01, 2015 10:38 am Post subject: Re: X inversely proportional to Y |
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| Fresco wrote: | X can go from 0 to 0.5
Y can go from 0 to 90
when X is 0 Y must be 90
when X is 0.5 Y must be 0
How much is X when Y is Y_val ? |
Lua code:
| Code: |
--y = Y_val
x = (90 - y )/180
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Last edited by Redouane on Fri May 01, 2015 11:24 am; edited 1 time in total |
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Fresco
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| Posted: Fri May 01, 2015 11:06 am Post subject: |
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I never used Lua.
How exactly do you embed it in your AA code ?
Thanks.
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Redouane
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| Posted: Fri May 01, 2015 11:21 am Post subject: |
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| Fresco wrote: | I never used Lua.
How exactly do you embed it in your AA code ?
Thanks. |
That depends on what you're trying to do,to keep writing to x the result of that operation?Or to keep calculating x to update the GUI of a trainer?
You can do it in assembly,the formula is:
x = (90 - y )/180 |
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mgr.inz.Player
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Location: W kraju nad Wisla. UTC+01:00
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| Posted: Fri May 01, 2015 1:15 pm Post subject: |
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| Code: | push eax
mov eax,#90
cvtsi2ss xmm1,eax
movss xmm0,xmm1 // xmm0=90, xmm1=90
subss xmm0,[y] // xmm0=90-y
addss xmm1,xmm1 // xmm1=180
divss xmm0,xmm1 // xmm0=(90-y)/180
movss [x],xmm0
pop eax |
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Fresco
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| Posted: Fri May 01, 2015 1:52 pm Post subject: |
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I have solved it like this:
| Code: | fld dword ptr [y]
fld dword ptr [float90]
fsub st(0), st(1)
fdiv dword ptr [float180] |
However, about Lua, where does one ever use it ?
Can it be used to simplify AA Coding ? Or is it just used to create macros ?
And how to use it? What is it's purpose in CE?
I have read a couple of posts in the Lua section but they only show Lua code which I'm learning from their website lua.org
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Zanzer
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| Posted: Fri May 01, 2015 3:25 pm Post subject: |
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Lua is usually good for things that require user interaction.
For example, adding numbers to a game value with each press or teleporting the player someplace.
Those actions are also possible through assembly using switches and hooking routines that execute frequently.
Could also be used to parse through a dynamic list in game memory and provide your users with different options.
To my knowledge, you can't declare a Lua function and then call it through assembly. You can, however, do the opposite. |
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Fresco
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| Posted: Fri May 01, 2015 3:48 pm Post subject: |
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Well if that's the case Lua might actually help me achieve my goal.
I'm trying to create a cheat code that allows the player to fly/noclip.
I have already implemented the code in assembly by injecting it somewhere in the game that gets executed every some milliseconds.
I've used the GetAsyncKeyState to detect whenever the user wants to fly.
I have found the crosshairs x and y, as well as the players x, y and z addesses.
So if the crosshairs is at 45 degrees, I know that I must move the player NorthEast, being 0.5 the maximum speed, I would have to add 0.25 to the player's x position and 0.25 to y position.
To get all the addresses I have to execute an assembly script, otherwise it's not possible, not with pointer not with anything else.
So the big question is: Can Lua help me achieve the same cheat code ?
Meaning:
1) Lua must get all the addresses from a memory location (that an assembly script declared/generated in newmem or whatever label)
2) The Lua code must run in parallel with the game, preferably without creating a new thread because that would totally slow down the game.
3) The Lua code must be able to increase/decrease the x, y, z player positon values based upon the crosshairs x and y.
4) The Lua code must only run when a certain key is pressed.
I don't need you to do my homework.
Just tell me if it's possible and if it is, where do I start (i.e. in cheat engine, because the Lua language I can learn from lua.org) ?
[EDIT]
Fount this:
http://tylerneylon.com/a/learn-lua/
Looks promising.
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Redouane
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| Posted: Fri May 01, 2015 4:49 pm Post subject: |
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Lua can do this I think
1-Just register newmem or any other label as a symbol,and you'll be able to get its address from Lua.
2-Lua scripts run on the Cheat Engine process,Lua is known for being fast and lightweight ,so you don't have to worry about performance.
3-You can use readFloat,writeFloat,readBytes...
4-Easy,register a function to be called when the key is pressed,and do whatever you want there.
I'd advice you to learn the language first,it's worth it I think. |
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Fresco
Grandmaster Cheater
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| Posted: Fri May 01, 2015 4:59 pm Post subject: |
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| Code: | while true do
--stuff
end |
| Code: | pseudocode:
while true do
if checkIfKeyIsPressed() then
doFlyCode();
end
end |
Both of the codes crash Cheat Engine.
What exactly is the code for calling the function only when the key is pressed?
Or how do I do it ?
Another thing is, how do I add a Lua script/code to the CE Table ?
Due to my knowledge of JavaScript, Java, C and C++ I can already say that I have Lua handled.
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Redouane
Master Cheater
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| Posted: Fri May 01, 2015 5:19 pm Post subject: |
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| Code: |
createHotkey(function()
showMessage'Hi,run your code here'
end, VK_H,VK_L)
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now,press H and L at once,you can specify as many keys as you want.
Check defines.lua for a full list of key codes.
You can add a script as table entry,or as a script that gets executed when the table gets opened,for the 2nd option,click 'Show cheat table Lua script' (at the top) |
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Fresco
Grandmaster Cheater
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| Posted: Fri May 01, 2015 5:25 pm Post subject: |
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Thanks, works like a charm.
One more question: How do I stop the script ?
Say execute this:
| Code: | createHotkey(function()
showMessage'Hi,run your code here'
end, VK_H,VK_L) |
But I also execute this:
| Code: | createHotkey(function()
showMessage'Hi, secon message here'
end, VK_H,VK_L) |
How do I stop them ?
Also how do I add the Lua code to the table ? Is it even possible ?
[EDIT]
resetLuaState(): This will create a new lua state that will be used. (Does not destroy the old one, so memory leak)
However it still executes the old one:
Error:attempt to call a nil value
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Redouane
Master Cheater
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Location: Algeria
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| Posted: Fri May 01, 2015 5:35 pm Post subject: |
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| Code: |
a = createHotkey(function() end,VK_A)
--to stop
a.destroy();
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everything is in main.lua
Also,read my previous post,Edited. |
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Fresco
Grandmaster Cheater
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| Posted: Sun May 03, 2015 10:10 am Post subject: |
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| Code: | function fly()
--ADDY GETTERS
xCoordAddy = readPointer( getAddress( "xcoord" ));
yCoordAddy = xCoordAddy+4;
zCoordAddy = xCoordAddy+8;
xCrossAddy = readPointer( getAddress( "crosshairbaseaddy" ));
yCrossAddy = xCrossAddy+4;
xCoord = readFloat( xCoordAddy );
yCoord = readFloat( yCoordAddy );
zCoord = readFloat( zCoordAddy );
xCross = readFloat( xCrossAddy );
yCross = readFloat( yCrossAddy );
speed = readFloat( "speed" );
writeFloat( yCoordAddy, yCoord+(( yCross*speed )/( -80.00 )));
--bla bla the rest
end--function fly() end
flyCode = createHotkey( fly, VK_Z ); |
The above code works but it's not smooth.
It moves the player in the crosshair direction with the correct speed but it feels like it's teleporting instead of gradually flying.
The assembly version works well, very smooth, but is there a way to make the movements smooth in the Lua version ?
If you have any ideas please post.
Thank you.
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daspamer
Grandmaster Cheater Supreme
 Reputation: 54
Joined: 13 Sep 2011
Posts: 1588
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| Posted: Sun May 03, 2015 3:33 pm Post subject: |
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| Fresco wrote: | | Code: | function fly()
--ADDY GETTERS
xCoordAddy = readPointer( getAddress( "xcoord" ));
yCoordAddy = xCoordAddy+4;
zCoordAddy = xCoordAddy+8;
xCrossAddy = readPointer( getAddress( "crosshairbaseaddy" ));
yCrossAddy = xCrossAddy+4;
xCoord = readFloat( xCoordAddy );
yCoord = readFloat( yCoordAddy );
zCoord = readFloat( zCoordAddy );
xCross = readFloat( xCrossAddy );
yCross = readFloat( yCrossAddy );
speed = readFloat( "speed" );
writeFloat( yCoordAddy, yCoord+(( yCross*speed )/( -80.00 )));
--bla bla the rest
end--function fly() end
flyCode = createHotkey( fly, VK_Z ); |
The above code works but it's not smooth.
It moves the player in the crosshair direction with the correct speed but it feels like it's teleporting instead of gradually flying.
The assembly version works well, very smooth, but is there a way to make the movements smooth in the Lua version ?
If you have any ideas please post.
Thank you. |
Cheat Engine hotkeys has 100ms interval, create your own timer and checked if they key is pressed.
| Code: | timer = createTimer(getMainForm());
timer.Interval = 1;
timer.onTimer = function () if (isKeyPressed(VK_Z)) then fly(); end |
A faster alternative would be running a loop in a new thread.
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I'm rusty and getting older, help me re-learn lua. |
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