Thanks a lot, I'll load it up n dirty it if I can, please stand to the
right - I knew there'd be a message.

Thanks

Pete

Mike Williams <mik### [at] nospamplease> wrote in message
news:xCs### [at] econymdemoncouk...
> Wasn't it Peter Cracknell who wrote:
> >I've been looking around and going through my mini-library of annoyingly
> >lo-res pictures I found on the web (all 10 of them or so) I found a
triangle
> >down the centre - included though as I said its lo-res, if you or anyone
> >could find something slightly more detailed or just tell me what 3d shape
it
> >is along with whats on it, I'd be especially grateful.
> >Thanks again
>
> I recognise that picture as being of part of the London Underground (the
> big clue is the underground symbol on the rightmost poster (a ring with
> a bar through it).
>
> If I remember correctly, the objects on the surfaces between the stairs
> have a triangular cross section, and the ends slope inwards at about the
> same angle as the faces. Something like:-
>
> #include "metals"
> intersection {
>   plane {y, -0.5 inverse}
>   plane {y, -0.5 rotate x*120 inverse}
>   plane {y, -0.5 rotate x*240 inverse}
>   plane {x, 4 rotate z*30}
>   plane {x, -4 rotate -z*30 inverse}
>   texture{T_Chrome_3B}
>   // rotated so that the bottom face matches the slope
>   rotate x*Escalator_Slope
> }
>
> but with rounded edges.
>
> They bear the inscription "Please stand on the right".
>
> Not all London Underground escalators have exactly the same objects, but
> they all have something in the same approximate locations to dissuade
> kids from sliding down the spaces between the escalators.
>
> --
> Mike Williams
> Gentleman of Leisure

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