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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?
--
Alf
http://www.peake42.freeserve.co.uk/
http://ourworld.compuserve.com/homepages/Alf_Peake/
gw3### [at] thersgb net
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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.
--
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/
<><
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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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"Alf Peake" <alf### [at] peake42freeservecouk> wrote in message
news:3acfa72e@news.povray.org...
> 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.
Hah! I ran into this misunderstanding. Drove me mad.
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On Mon, 9 Apr 2001 09:51:28 +0100, Tom Melly wrote:
>"Alf Peake" <alf### [at] peake42freeservecouk> wrote in message
>news:3acfa72e@news.povray.org...
>> 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.
>
>Hah! I ran into this misunderstanding. Drove me mad.
When I came up with the syntax, I considered the possibility that it would
drive people mad, but I thought that the alternative - that y'all would
think the ray actually has an endpoint - was no better. So I kept it the
way it is.
--
Ron Parker http://www2.fwi.com/~parkerr/traces.html
My opinions. Mine. Not anyone else's.
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"Ron Parker" <ron### [at] povrayorg> wrote in message
news:slr### [at] fwicom...
>
> When I came up with the syntax, I considered the possibility that it would
> drive people mad, but I thought that the alternative - that y'all would
> think the ray actually has an endpoint - was no better. So I kept it the
> way it is.
>
Hmm, my confusion was/is whether the direction is relative to the start
point or relative to <0,0,0> (rather than whether the trace has an
endpoint).
A quick look at the relevant example in the help serves to remind me if I
think REALLY hard.
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