General Ai.ini Configuration

dbsmda · Apr 17, 2018

Does anyone know of or have a link to a guide that explains the parameters found in "ai.ini"?

Im trying to fix the ai for the reliant robin so I can actually race with them.

Particularly these values:

[PEDALS]
GASGAIN=3.5
BRAKE_HINT=1.00
TRAIL_HINT=0.30

[LOOKAHEAD]
BASE=26.6
SPEED_GAIN=0.8
GAS_BRAKE_LOOKAHEAD=5

[STEER]
STEER_GAIN=1.5

LilSki · Apr 17, 2018

I don't remember what they all do exactly but just load up a race with like one other car and hit ctrl+c to let AI take control of your car and start tweaking the numbers. Once you start playing around it becomes pretty self explanatory.

dbsmda · Apr 18, 2018

Oh i never thought of ctrl+c, Thanks!

ltcars · Apr 18, 2018

dbsmda said:
Oh i never thought of ctrl+c, Thanks!

For tweaking the numbers you have to open the ai app

Jayenn · Apr 18, 2018

I can't remember where i found it - here or on the official forums or wherever - but i saved a forum post about this exact thing in my AC folder. Here you go:

[GEARS]
UP -> rpm the AI shifts up at
DOWN -> rpm the AI shifts down at
SLIP_THRESHOLD -> how well AI rev matches
GAS_CUTOFF_TIME -> how long ai lifts throttle on upshifts

[PEDALS]
GASGAIN -> how the AI pushes the throttle pedal vs. in other cars (since they have different engine maps, torque curves, etc)
BRAKE_HINT -> how the AI pushes the brake pedal in this car (0.9 = 90% of the recorded line's suggested braking)
TRAIL_HINT -> trail braking, same thing

[LOOKAHEAD]
BASE -> how far in front of the car the AI looks at the recorded line to know what to do
SPEED_GAIN -> how much it increases the distance according to speed (needs to look farther ahead to be ready for corners at higher speeds)
GAS_BRAKE_LOOKAHEAD -> not sure if this is added to the base. Tells the AI ~how far it needs to be ready to brake/throttle.

[STEER]
STEER_GAIN -> how hard the AI needs to turn the wheel to make corners (depends on ideal slip ratios, the way the car handles oversteer/understeer, etc.)

[DRAG]
SLIP_RATIO_LIMIT -> the AI won't brake or throttle to a higher slip ratio than this
[ULTRA_GRIP]
VALUE -> how much lateral grip the AI is simulated with in braking zones. This helps AIs brake closer to the limit
[PHYSICS_HINTS]
AERO_HINT -> how much aero grip the car gains with speed, so the AI can calculate high speed cornering speeds more accurately without having to know everything about its aero loads.

AccAkut · Apr 18, 2018

not all of these values are being used anymore, famously ULTRA_GRIP is now an internal value, and the one in the ini will be ignored

Guess its best to use the AI app while in the car in Ctrl-C mode

dbsmda · Apr 18, 2018

Thank you guys for the help. The ini and the ingame AI app are both helping me alot.

frank_will · May 28, 2018

I was looking into this as well, which one is the AI app you are referring to?

EDIT: Figured it out, should have searched a bit more first.

Sergio Loro · May 29, 2018

frank_will said:
I was looking into this as well, which one is the AI app you are referring to?

EDIT: Figured it out, should have searched a bit more first.

dont worry, happen to me all the time

Taufik P · Feb 4, 2019

Sorry to bump this old thread, but I can't find ai.ini file anywhere in my AC installation (version 1.16). Does AC still using ai.ini or not?

@Sergio Loro hi buddy! Long time no see! Remember me from rFactor's CSGT group with NormHart? (here's a video of our work waaay back then:

Glad to see you here buddy!

ltcars · Feb 4, 2019

Taufik P said:
Sorry to bump this old thread, but I can't find ai.ini file anywhere in my AC installation (version 1.16). Does AC still using ai.ini or not?

@Sergio Loro hi buddy! Long time no see! Remember me from rFactor's CSGT group with NormHart? (here's a video of our work waaay back then:

Glad to see you here bud!

Edit
Nvm

LilSki · Feb 4, 2019

Tracks don't use ai.ini. Only the cars do. And yes it's still used. You can't find one as they are locked in the data.acd for each car.

Taufik P · Feb 4, 2019

@LilSki I see. Thank you for clarifying that to me! So, whenever I press the Save AI button in the AI App window, and the message "ai.ini saved" appears, does it mean the packed ai.ini file got updated as well? Or... not?

LilSki · Feb 4, 2019

Taufik P said:
@LilSki I see. Thank you for clarifying that to me! So, whenever I press the Save AI button in the AI App window, and the message "ai.ini saved" appears, does it mean the packed ai.ini file got updated as well? Or... not?

Correct it isn't actually saving anything. The data.acd needs to be unpacked and be a data folder for that save function to work.

seamount0 · Jun 6, 2019

AccAkut said:
not all of these values are being used anymore, famously ULTRA_GRIP is now an internal value, and the one in the ini will be ignored

Guess its best to use the AI app while in the car in Ctrl-C mode

seamount0 · Jun 6, 2019

May you please tell me where i fund the ai app while in the car in ctrl-c mode?

ltcars · Jun 6, 2019

seamount0 said:
May you please tell me where i fund the ai app while in the car in ctrl-c mode?

Enable developer apps

AndreKR7 · Mar 1, 2020

Where can I find the AI Ini file?

einbecker1 · Apr 2, 2020

AndreKR7 said:
Where can I find the AI Ini file?

1. Use Content Manager to unpack data.acd of specific car.
2. look into data folder and You will find ai.ini
3. Open it with notepad++

sab00000001 · Apr 6, 2020

LilSki said:
Correct it isn't actually saving anything. The data.acd needs to be unpacked and be a data folder for that save function to work.

I notice that if there is a Data directory (you can make one) it will save the ai.ini into there (I don't know if that saved out version will be used in the presence of a Data.acd file). LilSki, can you tell me if and where the value "AI Push" (in the AI app) gets saved if you change it? Changing that doesn't change any values in the ai.ini that I save. That AI Push value (with "Magic" ON) seems to reign-in a car that's too fast (like the VMW 917-10 at Okutama) when set to 95 or less, but it seems that value can't be saved anywhere. Any tips?