Thanks Chris, seems I was confusing direction with ray's end point or
destination. Back on track again now but I must cut out this snue
gliffing.

Alf


"Chris Huff" <chr### [at] maccom> wrote in message
news:chrishuff-0F4349.09300307042001@news.povray.org...
> In article <3acf16d3@news.povray.org>, "Alf Peake"
> <alf### [at] peake42freeservecouk> wrote:
>
> > I'm playing with MPov 0.6a trace() for the first time. Do all
tests
> > have to pass thru' origin? I have to move my object if I want
> > different?
>
> No, what gave you that idea? You just have to specify a start point
and
> a direction, the ray doesn't have to pass through the origin.

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