Re: [Top10-devel] Have had too much work to contribute ..

[Johann Deneux]

Lars Segerlund wrote:
>  But I am interested in the format for the tracks, and for the other 
> models.
>
>  / lars segerlund.
>
>
>
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For the models, they come from lightwave. It's planned to add more 
formats, to allow the use of other (free) modelers.

Tracks are described by giving a list of straight lines. Curves are then 
inserted to joine them. They also contain information about the starting 
position.
For example, see data/ring:

> orientation { direct }

This describes the orientation of the track. I believe only direct is 
supported right now. Funny bugs may show up in the indirect case.

> start { <-1.0, 0.0, 0.0> <1.0, 0.0, 0.0> <0.0, 0.0, 1.0> }

This describes the starting grid. The line is givent by the two first 
vectors, while the third tells the direction (this is a redudant with 
the orientation section, but well ...)

>sections {
>        straights
>        { <0.0, 0.0, 0.0> <0.0, 0.0, 100.0> }

First straight line

>        { <40.0, 0.0, 140.0> <60.0, 0.0, 140.0> 10.0 10.0 }

Second short straight line. The two floats at the end are twist angle, 
ie the two side of the straight line are not at the same altitude. The 
value is in degrees.

>        { <100.0, 0.0, 100.0> <100.0, 0.0, 0.0> }
>        { <60.0, 0.0, -40.0> <40.0, 0.0, -40.0> 10.0 10.0 }
>        end
>}

Notes: no straight line should cross. That means it's not possible to 
model bridges or tunnels :/

I also haven't done much on top10, but I think I'll start again working 
on it soon. Knowing at least one guy is toying with it is motivating :)

--
Johann Deneux