Found AI Problem With The Nextgen 7 Cars Now I Need Help.

[SteveMack]

Hi,
Been having a lot of trouble trying to fix the AI on the Nascar Nextgen 7 cars per
my other posts, been having a real bad problem with the Chevy cars.
I have found the problem and the ride height on just the Chevy AI cars is sitting
high, too high, they are sometimes bouncing in the corners. I am putting up screen
shots of the 3 makes so you can see the difference in the AI cars. Just for clarity an ai_default setup does not help in any way. Screens below.
Thanks if you can help!
Steve

 

[SteveMack]

Ok found the problem with the chevy.
Big Edit On This Post:
You do not have to clone your setup as I state below, I would suggest that you do because it makes for better racing, you don't have to though.
What you can do is go to your suspensions.ini folder for the Chevy.
Look in and find :
[FRONT]
ROD_LENGTH=0.050
Change that value to 0.045

[REAR]
ROD_LENGTH=0.100
Change that value to 0.045

I have also found a major mistake in the setup.ini file ALL of
the rod lengths min and max values are set to the same value
you have to change them:
[ROD_LENGTH_LR]
SHOW_CLICKS=2
TAB=SUSPENSION
NAME=Height LR
MIN=-500
MAX=500 these are both set at 500 in the original file!!!
STEP=20
POS_X=0
POS_Y=7
HELP=HELP_LR_RODLENGTH
Credit for my edit goes to member IMEAN for his help.
Problem is that the rear suspension was on a 4 link axle instead of a double wish bone.
I could not drive the player car, massive understeer and the AI were just driving awful.
The solution is to do this to the suspensions.ini for the chevy car.
This did not help the ride height look for the AI, the solution for that is to
clone your player car setup in CM for the track your on after you fixed the suspensions.ini file.
Name your cloned setup ai_default and that was what worked for me, I will add a screenshot.
Now for the suspensions.ini file change it to this(you can probably take out the AXLE section, I just commented it out with the semi colons:
You will see where AXLE is changed to DWB:

[REAR]

TYPE=DWB ;AXLE

BASEY=-0.20 ; Distance of CG from the center of the wheel in meters. Rear Wheel Radius+BASEY=Rear CoG Actual CG height =(FWR+FBasey)+(RWR+Rbasey))/CG_LOCATION%

TRACK=1.65
ROD_LENGTH=0.100

HUB_MASS=120

WBCAR_TOP_FRONT=1.20842, -0.0557, 0.2214

WBCAR_TOP_REAR=1.2680, -0.0594, 0.0308

WBCAR_BOTTOM_FRONT=1.37702, -0.15686, 0.3042

WBCAR_BOTTOM_REAR=1.47702, -0.11686, -0.1154

WBTYRE_TOP=0.06622, 0.1207, -0.0065

WBTYRE_BOTTOM=0.04602, -0.15706, 0.0187

WBCAR_STEER=1.47702, -0.11686, -0.1154

WBTYRE_STEER=0.04602, -0.15706, -0.1154

TOE_OUT=0.00030

STATIC_CAMBER=-0
SPRING_RATE=65000

PROGRESSIVE_SPRING_RATE=0

BUMP_STOP_RATE=34500

BUMPSTOP_UP=0.110

BUMPSTOP_DN=0.050

PACKER_RANGE=0.100

DAMP_BUMP=7400

DAMP_FAST_BUMP=5900

DAMP_FAST_BUMPTHRESHOLD=0.080

DAMP_REBOUND=8700

DAMP_FAST_REBOUND=7300

DAMP_FAST_REBOUNDTHRESHOLD=0.100



;[AXLE]

;LINK_COUNT=4
;J0_CAR=0.02,-0.0987,0.481 ; car bottom left arm. reference point center of live axle

;J0_AXLE=0.433,-0.0987,-0.050 ; tyre bottom left arm. reference point center of live axle

;J1_CAR=-0.02,-0.0987,0.481 ; car bottom right arm. reference point center of live axle

;J1_AXLE=-0.433,-0.0987,-0.050 ; tyre bottom right arm. reference point center of live axle


;J2_CAR=0.045,0.040,0.260 ; car top right arm. reference point center of live axle

;J2_AXLE=0.045,0.050,-0.050 ; tyre top right arm. reference point center of live axle


;J3_CAR=-0.635,-0.0687,-0.060 ; car top right arm. reference point center of live axle

;J3_AXLE=0.635,-0.0987,-0.100 ; tyre top right arm. reference point center of live axle

;TORQUE_REACTION=0.5

Here is the screenshot of an AI chevy:

 

[IMEAN]

Interesting. Thanks for sharing your solution.

If you share the link for the cars, I might be able to fix the ride height issue without the need of a ai_default file.

 

[SteveMack]

Interesting. Thanks for sharing your solution.

If you share the link for the cars, I might be able to fix the ride height issue without the

Interesting. Thanks for sharing your solution.

If you share the link for the cars, I might be able to fix the ride height issue without the need of a ai_default file.

Interesting. Thanks for sharing your solution.

If you share the link for the cars, I might be able to fix the ride height issue without the need of a ai_default file.

OK I am putting up the link, it might be possible that I don't need to make a ai_default file, It is possible that it will work without doing that, It works fantastic with it but I didn't have time really make sure of it, but if you find something in the meantime then that's cool also.
Here's the download

 

[IMEAN]

Just by looking at your posts:

Why don't you just change the "ROD_LENGTH" in the suspensions.ini to a higher lower value?
The values in suspension.ini determine the default for a car.

I do not know if the ai can change right height, but if so go to the setup.ini and change
the min values of these parts:
(you have to change that anyways if the default setup allows values that are too low)

[ROD_LENGTH_LF]
SHOW_CLICKS=2
TAB=SUSPENSIONS
NAME=Height LF
MIN=100
MAX=350

 

[SteveMack]

Just by looking at your posts:

Why don't you just change the "ROD_LENGTH" in the suspensions.ini to a higher value?
The values in suspension.ini determine the default for a car.

I do not know if the ai can change right height, but if so go to the setup.ini and change
the min values of these parts:
(you have to change that anyways if the default setup allows values that are too low)

[ROD_LENGTH_LF]
SHOW_CLICKS=2
TAB=SUSPENSIONS
NAME=Height LF
MIN=100
MAX=350

Ok, I feel like ALMOST like an idiot but maybe not, I will tell you why.
I have been a mechanic for many years, what I am going to associate ROD LENGTH in a situation like this is SHOCK ROD LENGTH.
This is why I didn't change that value in the suspensions.ini thought that value had nothing to do with RIDE HEIGHT.
I had to lower both front and rear values when I did a double take and had seen that the front was half the height as the rear
So:
Front was: ROD_LENGTH=0.050
Rear was: ROD_LENGTH=0.100

Changed to:
Front: ROD_LENGTH=0.045
Rear: ROD_LENGTH=0.045

That worked, I deleted the ai_default file before testing.

Using the ai_default setup route does work, it did fix the ride height issue and
apparently will use your setup that you renamed.

I will edit my original post to reflect this.

I Thank You for pointing this out, I probably wasn't going to go back to thinking about
rod length changing ride height, unless stumbling upon it somehow.

Thanks Again
Steve

 

[IMEAN]

I just started with modding setups.ini and suspension.ini and I was also confused with ride heights on the project I did.

So no worries don't feel dumb^^

For anyone who is still confused: Change the ride heights in suspension.ini, then you do not need an ai_default setup.

 

[SteveMack]

I have also found a major mistake in the setup.ini file ALL of
the rod lengths min and max values are set to the same value
you have to change them:
[ROD_LENGTH_LR]
SHOW_CLICKS=2
TAB=SUSPENSION
NAME=Height LR
MIN=-500
MAX=500 these are both set at 500 in the original file!!!
STEP=20
POS_X=0
POS_Y=7
HELP=HELP_LR_RODLENGTH