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From: Doctor John
Subject: Sphere_sweeps: determining axial vector at any arbitrary point
Date: 11 Feb 2003 13:32:41
Message: <3e4941c9$1@news.povray.org>
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I suspect the answer to this may be "No", but just in case...
Is there any way of determining the axial vector of a sphere_sweep at any
arbitrary point on that sweep.
The determination of this is obviously trivial using a linear_spline, but is
there a solution for b_spline and cubic_spline.
(Reason for question: I'm trying to determine the placing of joints and
flanges on some pieces of complicated pipe-work and atm I'm limited to trial
and error.
John
--
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Run Free
Run Linux
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From: Gilles Tran
Subject: Re: Sphere_sweeps: determining axial vector at any arbitrary point
Date: 11 Feb 2003 13:43:30
Message: <3e494452$1@news.povray.org>
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3e4941c9$1@news.povray.org...
> Is there any way of determining the axial vector of a sphere_sweep at any
> arbitrary point on that sweep.
Have a look at the Spline_Trans macro in transforms.inc, I suppose it could
be modified to do what you want.
BTW, there are lots of goodies in the new inc files, they're worth checking
out if you haven't done so.
G.
--
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- POV-Ray and Poser computer images
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From: Doctor John
Subject: Re: Sphere_sweeps: determining axial vector at any arbitrary point
Date: 11 Feb 2003 13:56:46
Message: <3e49476e$1@news.povray.org>
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>
> Have a look at the Spline_Trans macro in transforms.inc, I suppose it
could
> be modified to do what you want.
OK, I'll have look there tonight, but don't blame me if I come back looking
baffled and begging for clarification :-)
> BTW, there are lots of goodies in the new inc files, they're worth
checking
> out if you haven't done so.
>
I do occasionally dip in to get ideas; that's where I got the idea of the
refinement to Fabien Mosen's shear.pov ; however, I must admit that I
haven't spent as much time on them (.inc file goodies) as I should have done
John
--
Run Fast
Run Free
Run Linux
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From: Doctor John
Subject: Re: Sphere_sweeps: determining axial vector at any arbitrary point
Date: 12 Feb 2003 08:33:01
Message: <3e4a4d0d@news.povray.org>
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"Gilles Tran" <tra### [at] inapg inrafr> wrote
>
> Have a look at the Spline_Trans macro in transforms.inc, I suppose it
could
> be modified to do what you want.
Checked it out last night. As usual you're absolutely right. A little bit of
hacking and it'll do what I want.
Thanx
John
--
Run Fast
Run Free
Run Linux
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