I like it, but where is the sound? :-)

How about a curved track BTW?

Christoph

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"Greg M. Johnson" wrote:
> They accelerate or brake in response to what they see in
> front of them, and always steer to the clearest path in
> front of them.  Pretty cool

Yes, I agree! Exactly how does a car "see" the other cars? Is it given
information about it's location or what? And how does it decide which cars
to worry about? Does it consider the closest car only, or cars inside a
certain radius from it or...?

Oh wait, you said you posted the code - so I can just look for myself...

> (Whew! I was afraid Rune was going to beat me to this.
> Not that we are in a race, but sometimes he implements
> better solutions to my ideas before i can!)

Hehe, don't worry, I'll concentrate on my particle system for a while! :)

Rune
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"Greg M. Johnson" wrote:
> 
> Please find enclosed a first release of a system for modelling a race
> track with 17 cars.
> Self-intelligent actors of course favored over photorealism here.

I wish this could have been said about that Tom Cruise movie!

> 
> They accelerate or brake in response to what they see in front of them,
> and always steer to the clearest path in front of them.  Pretty cool,
> although with the parameters set the way they are right now, it seems
> that they are a bit too eager to come to a complete stop.  But hey
> that's probably how traffic jams happen--some bloke following too close
> behind, who then has to slam on his brakes!

It seems you should program you cars to try to overtake a slower car in
front if possible.  As it stands, the anim looks kinda stupid as 4 cars
come to a complete stop while there's plenty of room besides them.

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Spock wrote:

> More interesting stuff to complement your flocking algorithms...
>
> If I were to change anything it would be the camera angle.

Yes, ideally one might start out from the cockpit of one car, switch to
stationary view as cars zoom by, then this blimp's-eye view.

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Rune wrote:

> Yes, I agree! Exactly how does a car "see" the other cars? Is it given
> information about it's location or what? And how does it decide which cars
> to worry about? Does it consider the closest car only, or cars inside a
> certain radius from it or...?

The braking/acceleration decision is based on a calculation of "number of

decision is based on a bunch of complicated goobledeegook with trace calls to
immediate left & right at rear and what's generally ahead.

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Christoph Hormann wrote:

> How about a curved track BTW?

BTW, it's a circle--the union of a small cylinder and a difference of a
medium cylinder from a large one.


life, the cars might be going a lot faster--I'm only getting 1/4 lap in

the brake/accel/steer parameters in order to get the cars around faster.
I think if I just recorded say every 1/4 frames it might look too jumpy.

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Francois Labreque wrote:

> "Greg M. Johnson" wrote:
>
> > They accelerate or brake in response to what they see in front of them,

> > although with the parameters set the way they are right now, it seems

> > that's probably how traffic jams happen--some bloke following too close
> > behind, who then has to slam on his brakes!
>
> It seems you should program you cars to try to overtake a slower car in

> come to a complete stop while there's plenty of room besides them.

Yeah, right now it considers a stopped car accelerating away from it but


way to code your suggestion, but am trying to decide if this kind of
complexity is what I want...

BTW: thanks very much to all for your comments! 4 the same day is a
compliment, no?

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"Greg M. Johnson" should have said:

> Yeah, right now it considers a **MOVING** car accelerating away from it but

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More like end of the work day and everyone trying to leave at once without
finding the road out of the parking lot.
Looks like it does well at what it does.

Bob H.

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It looks really good. The movement seems slow, and some of the cars that don't
get very far remind me of really timid bumper cars instead of race cars. I
can't wait to see this theme explored more. A few seconds of animation from
the pit crew area just watching the cars zoom by would enhance the speed image
of the cars. I also like the idea of a drivers view. Keep up the great work

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