I was checking out the spline-tutorial on the povray help file and I read
the following quote:

It is quite difficult to come up with a set of points that describe a given
curve without the help of a modeling program supporting POV-Ray's surface of
revolution object. If such a program is available we should take advantage of
it.


Which freely available program allows you to do this?

Thanks

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"quoderatd" <quo### [at] gmailcom> wrote:
> I was checking out the spline-tutorial on the povray help file and I read
> the following quote:
>
> It is quite difficult to come up with a set of points that describe a given
> curve without the help of a modeling program supporting POV-Ray's surface of
> revolution object. If such a program is available we should take advantage of
> it.
>
>
> Which freely available program allows you to do this?
>
> Thanks

Both Moray http://www.stmuc.com/moray/ and Bishop3D http://www.bishop3d.com/
will allow you to do this. Besides giving you an OpenGL preview they will
output SDL to PovRay for your render.
Moray is free but its development has stalled. Bishop3D is still under
development but is at RC2. Bishop3D has a SDL parser so there is a good chance
that you can import your existing code into it.

Stephen

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"Stephen" <mcavoys_AT_aolDOT.com> wrote in message 
news:web.4a54b6a46f5f79235fd99d9e0@news.povray.org...
> "quoderatd" <quo### [at] gmailcom> wrote:
>> I was checking out the spline-tutorial on the povray help file and I read
>> the following quote:
>>
>> It is quite difficult to come up with a set of points that describe a 
>> given
>> curve without the help of a modeling program supporting POV-Ray's surface 
>> of
>> revolution object. If such a program is available we should take 
>> advantage of
>> it.
>>
>>
>> Which freely available program allows you to do this?
>>
>> Thanks
>
> Both Moray http://www.stmuc.com/moray/ and Bishop3D 
> http://www.bishop3d.com/
> will allow you to do this. Besides giving you an OpenGL preview they will
> output SDL to PovRay for your render.
> Moray is free but its development has stalled. Bishop3D is still under
> development but is at RC2. Bishop3D has a SDL parser so there is a good 
> chance
> that you can import your existing code into it.
>

There are also some little dedicated tools that can do this. For example, 
I've used the Spilin editor (see 
http://news.povray.org/povray.binaries.utilities/thread/%3C48cf4dea@news.povray.org%3E/)

which is for just this sort of thing and can export POV-Ray prisms, lathes 
or SoRs.

You can also convert 2D SVG splines into POV-Ray prism objects using the 
free InkScape graphics editor. It won't directly generate SoR or lathe 
objects, but it's not too difficult to extract the spline data from the 
prism and use it in the other object types.

Regards,
Chris B.

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I made one for Lathe and SOR for win 98 its at

http://leroywhetstone.s5.com/

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