For those that remember, a while back I posted some renderes of car models 
taken from Live for Speed (www.liveforspeed.net).  Well they just recently 
released a new version with an F1 car, as within a day or two the community 
had created skins for all the teams.  So I just made a render with the skin 
from the Renault team.

I deleted the original wheels and tyres because you could see the polygons 
when rendered with POV.  I've done the tyres, but am thinking how to do the 
wheels.  I think it will be pretty hard to do them in POV as there are too 
many rounds and curved surfaces, maybe I will give it a go in Wings. 
Anyway, here it is without wheels:

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Looks good so far.  Would like to see it on a race track with other POV
roadsters...
--
Dan
GoofyGraffix.com

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At the speedway where I grew up (Oswego Speedway 
http://www.oswegospeedway.com/), the raced what they would call "super 
modified" cars. One of the drivers showed me his car once and it looked 
to me like they pretty much would build the cars from the ground up.
Anyway, the tires on these cars had no tread on them whatsoever. It made 
me wonder why that didn't cause a problem getting a good grip on the 
pavement. I still don't know, but the racing tires looked completely smooth.
Like this:

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Halbert wrote:
> At the speedway where I grew up (Oswego Speedway 
> http://www.oswegospeedway.com/), the raced what they would call "super 
> modified" cars. One of the drivers showed me his car once and it looked 
> to me like they pretty much would build the cars from the ground up.
> Anyway, the tires on these cars had no tread on them whatsoever. It made 
> me wonder why that didn't cause a problem getting a good grip on the 
> pavement. I still don't know, but the racing tires looked completely 
> smooth.
> Like this:
> 
> ------------------------------------------------------------------------
> 

No tread actually grips a smooth track better.  The problem is that once 
you overcome the friction and lose traction, you lose complete control 
of the car.  The tread is like a claw that grabs the ground, giving back 
control.

You'll see them switch between the no-tread and treaded tires in 
situation when they think they could lose traction, ie when it looks 
like it'll rain they put on treaded tires.  The all-weather tires most 
people use on their cars have tread for this same reason, and snow tires 
have an unusually pronounced tread on them.

...Chambers

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news:4452b1e2@news.povray.org...
the car Scott rendered is a Formula1 and Formula 1 current rules try to
favor driving skills versus car performance
Tyres you shown are "slicks" ...maximum grip when rubber is soft but
increasing speed ...and maximum risk if a car gets off track
have a look at his
http://www.chm.bris.ac.uk/webprojects2003/hancock/tread.html

Marc

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"scott" <spa### [at] spamcom> wrote in message news:444fdea1@news.povray.org...
> For those that remember, a while back I posted some renderes of car models 
> taken from Live for Speed (www.liveforspeed.net).  Well they just recently 
> released a new version with an F1 car, as within a day or two the 
> community had created skins for all the teams.  So I just made a render 
> with the skin from the Renault team.
>
Nice :)

> I deleted the original wheels and tyres because you could see the polygons 
> when rendered with POV.  I've done the tyres, but am thinking how to do 
> the wheels.  I think it will be pretty hard to do them in POV as there are 
> too many rounds and curved surfaces, maybe I will give it a go in Wings. 
> Anyway, here it is without wheels:
>
Your tyres are right. IIRC FIA rules prevent slicks in F1. I can't remember 
offhand what the wheels look like but you could try a combination of blobs, 
lathe and besier-patches.


-- 
-Nekar Xenos-
----------------------------------------
"The truth is out there..."

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Nekar Xenos nous apporta ses lumieres en ce 30/04/2006 16:09:
> "scott" <spa### [at] spamcom> wrote in message news:444fdea1@news.povray.org...
> 
>>For those that remember, a while back I posted some renderes of car models 
>>taken from Live for Speed (www.liveforspeed.net).  Well they just recently 
>>released a new version with an F1 car, as within a day or two the 
>>community had created skins for all the teams.  So I just made a render 
>>with the skin from the Renault team.
>>
> 
> Nice :)
> 
> 
>>I deleted the original wheels and tyres because you could see the polygons 
>>when rendered with POV.  I've done the tyres, but am thinking how to do 
>>the wheels.  I think it will be pretty hard to do them in POV as there are 
>>too many rounds and curved surfaces, maybe I will give it a go in Wings. 
>>Anyway, here it is without wheels:
>>
> 
> Your tyres are right. IIRC FIA rules prevent slicks in F1. I can't remember 
> offhand what the wheels look like but you could try a combination of blobs, 
> lathe and besier-patches.
> 
> 
F1 tires have parallel, square profiled, grooves. They look the same stationary and
running. There 
are 4 grooves on the front tires and 5 on the rear ones.
A good aproximation can be done with flaten torii for the flanks, a whide cylinder for
the bottom of 
the grooves and some narrower cylinders for the sole itself.

-- 
Alain
-------------------------------------------------
Adult, n.: One old enough to know better.

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>> At the speedway where I grew up (Oswego Speedway
>> http://www.oswegospeedway.com/), the raced what they would call
>> "super modified" cars. One of the drivers showed me his car once
>> and it looked to me like they pretty much would build the cars
>> from the ground up. Anyway, the tires on these cars had no tread
>> on them whatsoever. It made me wonder why that didn't cause a
>> problem getting a good grip on the pavement. I still don't know,
>> but the racing tires looked completely smooth.
>> Like this:
>>
>> ------------------------------------------------------------------------
>>
>
> No tread actually grips a smooth track better.  The problem is that
> once you overcome the friction and lose traction, you lose complete
> control of the car.  The tread is like a claw that grabs the
> ground, giving back control.
>
> You'll see them switch between the no-tread and treaded tires in
> situation when they think they could lose traction, ie when it looks
> like it'll rain they put on treaded tires.  The all-weather tires
> most people use on their cars have tread for this same reason, and
> snow tires have an unusually pronounced tread on them.

Actually the tread is used on road cars (and racing cars in the wet) to 
ensure the car doesn't aquaplane (ie float on the water with no contact to 
the road).  The water goes into the tread gaps and allows the rest of the 
rubber to actually hit the road surface.  If you used slicks they would just 
skim across the surface with no contact at all to the road.

If you've driven too fast across a deep puddle in your road car you will be 
familiar with the loss of grip.

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