rec.autos.simulators

GPL AI racers

MK

GPL AI racers

by MK » Sat, 17 Feb 2001 10:19:40

Two questions:

Are the AI racers in GPL worth emulating? I just ran a novice race at Monza,
and afterward I reviewed the in***pit of the other drivers. Either I was
shifting at all the wrong places, or the AI is faking it, or maybe all the
drivers really did drive so totally differently. Even different drivers in
the same cars would sometimes wind it way out (Chris Amon almost never hit
5th)  or shift quick (Bandini and Parkes both using lots of upper gear). It
also seemed as though the AI drivers were braking impossibly deep in the
turns.

Also, does GPL model tire wear at all? I thought I read that it didn't, but
I swear that after one off road excursion (and not using shift-R) that the
car is a lot more susceptible to slipping. As if I've flat-spotted a tire or
something.<g>

Power Post 20

GPL AI racers

by Power Post 20 » Sat, 17 Feb 2001 11:14:49



I've noticed that after a spin or two, it gets a lot easier to spin
again.  Seems like the tires get hot and lose their grip.

- Show quoted text -

Sjoerd de Roes

GPL AI racers

by Sjoerd de Roes » Sat, 17 Feb 2001 20:30:11


>Two questions:

>Are the AI racers in GPL worth emulating? I just ran a novice race at
Monza,
>and afterward I reviewed the in***pit of the other drivers. Either I was
>shifting at all the wrong places, or the AI is faking it, or maybe all the
>drivers really did drive so totally differently. Even different drivers in
>the same cars would sometimes wind it way out (Chris Amon almost never hit
>5th)  or shift quick (Bandini and Parkes both using lots of upper gear). It
>also seemed as though the AI drivers were braking impossibly deep in the
>turns.

They don't use the same physics model as you do. So it isn't really a good
thing to try and emulate their driving style.

It doesn't model tire wear, but it does model tire heat.

Sjoerd

Herbert Pohl

GPL AI racers

by Herbert Pohl » Sat, 17 Feb 2001 23:40:06





>>Also, does GPL model tire wear at all? I thought I read that it didn't, but
>>I swear that after one off road excursion (and not using shift-R) that the
>>car is a lot more susceptible to slipping. As if I've flat-spotted a tire or
>>something.<g>

>I've noticed that after a spin or two, it gets a lot easier to spin
>again.  Seems like the tires get hot and lose their grip.

Maybe you just damaged the car (suspension,...)?

Once I had a minor accident during a monza-11-lapper,
and afterwards I noticed that my lap times went up by
1 sec. from this point on (didnt feel anything unsusual during driving).
GPL Replay Analyser showed a suspension problem in the tech review
of the replay..

   Calis

Power Post 20

GPL AI racers

by Power Post 20 » Sun, 18 Feb 2001 00:09:23

That's possible, but it's happened a few times when I didn't hit
anything.  Sliding off the track then back on it might hurt the
suspension, though.







>>>Also, does GPL model tire wear at all? I thought I read that it didn't, but
>>>I swear that after one off road excursion (and not using shift-R) that the
>>>car is a lot more susceptible to slipping. As if I've flat-spotted a tire or
>>>something.<g>

>>I've noticed that after a spin or two, it gets a lot easier to spin
>>again.  Seems like the tires get hot and lose their grip.

>Maybe you just damaged the car (suspension,...)?

>Once I had a minor accident during a monza-11-lapper,
>and afterwards I noticed that my lap times went up by
>1 sec. from this point on (didnt feel anything unsusual during driving).
>GPL Replay Analyser showed a suspension problem in the tech review
>of the replay..

>   Calis

Ruud van Ga

GPL AI racers

by Ruud van Ga » Sun, 18 Feb 2001 00:51:34





>>Two questions:

>>Are the AI racers in GPL worth emulating?

They use a simplified version of the physics, so I'd say, no.

Tire wear is not modeled, since it was nearly not present with the
tires those days (too hard). However, tire *temperature* IS modeled,
and makes up for a great deal of slippery. Usually, best times will
only be possible after a lap or 3 on an averaged-sized track (say,
Monza).

Ruud van Gaal, GPL Rank +53.25
Pencil art    : http://www.marketgraph.nl/gallery/
Car simulation: http://www.marketgraph.nl/gallery/racer/

Power Post 20

GPL AI racers

by Power Post 20 » Sun, 18 Feb 2001 01:34:18

Straight out of the pits with cold tires will give you fits, too,
until they get a little warm.







>>>Two questions:

>>>Are the AI racers in GPL worth emulating?

>They use a simplified version of the physics, so I'd say, no.

>>>Also, does GPL model tire wear at all? I thought I read that it didn't, but
>>>I swear that after one off road excursion (and not using shift-R) that the
>>>car is a lot more susceptible to slipping. As if I've flat-spotted a tire or
>>>something.<g>

>>I've noticed that after a spin or two, it gets a lot easier to spin
>>again.  Seems like the tires get hot and lose their grip.

>Tire wear is not modeled, since it was nearly not present with the
>tires those days (too hard). However, tire *temperature* IS modeled,
>and makes up for a great deal of slippery. Usually, best times will
>only be possible after a lap or 3 on an averaged-sized track (say,
>Monza).

>Ruud van Gaal, GPL Rank +53.25
>Pencil art    : http://www.marketgraph.nl/gallery/
>Car simulation: http://www.marketgraph.nl/gallery/racer/

Stephen Smit

GPL AI racers

by Stephen Smit » Sun, 18 Feb 2001 08:05:19

Herbert,

In any of the damage modes (except none) you can damage the
suspension...often more easily by sticking the car in the bushes than by
slamming into the wall!  This usually manifests itself by a pull to one side
or the the other, as if you'd bent a tie-rod.

--Steve






> >>Also, does GPL model tire wear at all? I thought I read that it didn't,
but
> >>I swear that after one off road excursion (and not using shift-R) that
the
> >>car is a lot more susceptible to slipping. As if I've flat-spotted a
tire or
> >>something.<g>

> >I've noticed that after a spin or two, it gets a lot easier to spin
> >again.  Seems like the tires get hot and lose their grip.

> Maybe you just damaged the car (suspension,...)?

> Once I had a minor accident during a monza-11-lapper,
> and afterwards I noticed that my lap times went up by
> 1 sec. from this point on (didnt feel anything unsusual during driving).
> GPL Replay Analyser showed a suspension problem in the tech review
> of the replay..

>    Calis

MK

GPL AI racers

by MK » Sun, 18 Feb 2001 08:30:56

Yeah, but I was using no damage. (ok, i'm  a dweeb)



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