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What exactly are NURBS? A question I always wanted to ask!
Warp wrote:
> Saadat Saeed <saa### [at] batelco combh> wrote:
> : Povray can render anything...
>
> Not anything. For some things it has to use only approximations (eg. NURBS).
>
> --
> main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
> ):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
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In article <3923d5a4@news.povray.org>, Warp <war### [at] tagpovrayorg>
wrote:
> Saadat Saeed <saa### [at] batelcocombh> wrote:
> : Povray can render anything...
>
> Not anything. For some things it has to use only approximations (eg.
> NURBS).
NURBS would be a primitive, not a physical object...I doubt there are
many objects POV could not render models of, as long as those models are
in a format it can use(triangles, isosurfaces, etc).
--
Christopher James Huff - Personal e-mail: chr### [at] yahoocom
TAG(Technical Assistance Group) e-mail: chr### [at] tagpovrayorg
Personal Web page: http://chrishuff.dhs.org/
TAG Web page: http://tag.povray.org/
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> Try Spatch.. it think there is a tutorial somewhere on modelling human
> heads using Spatch... after that use povray to render them!
http://www.geocities.com/SoHo/Studios/7415/
...and you can pick up sPatch here:
http://www.tiac.net/users/pclute/spatch.htm
--
Phil
...coffee?...yes please! extra sugar,extra cream...Thank you.
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Wasn't it Saadat Saeed who wrote:
>What exactly are NURBS? A question I always wanted to ask!
Non-Uniform Rational B-Splines.
They sort of do for 3d surfaces what Bezier Curves do for 2d lines. The
NURBS surface has a number of control points to which it is attracted,
and the control points can have different strengths (hence the "non-
uniform"). The higher the strength, the more the surface is attracted to
the control point and the more sharply it bends.
In a graphical modelling program, manipulating the control points can be
a bit like moulding modelling clay.
--
Mike Williams
Gentleman of Leisure
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So what would be an example of a NURBS modeller (freeware so that I can
download it and try it now!)?
Mike Williams wrote:
> Wasn't it Saadat Saeed who wrote:
>
> >What exactly are NURBS? A question I always wanted to ask!
>
> Non-Uniform Rational B-Splines.
>
> They sort of do for 3d surfaces what Bezier Curves do for 2d lines. The
> NURBS surface has a number of control points to which it is attracted,
> and the control points can have different strengths (hence the "non-
> uniform"). The higher the strength, the more the surface is attracted to
> the control point and the more sharply it bends.
>
> In a graphical modelling program, manipulating the control points can be
> a bit like moulding modelling clay.
>
> --
> Mike Williams
> Gentleman of Leisure
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Saadat Saeed wrote:
>
> So what would be an example of a NURBS modeller (freeware so that I can
> download it and try it now!)?
With NURBS modelling programs you get what you pay for but if my
info is correct MOPS might be good for getting a feeling for
NURBS modelling and it's free.
http://www.informatik.uni-rostock.de/~rschultz/mops/
--
Ken Tyler - 1400+ POV-Ray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/
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I heard that rhino is a good modeeler for NURBs is that correct. Is that
worth the pricetag though??
Ken wrote:
> Saadat Saeed wrote:
> >
> > So what would be an example of a NURBS modeller (freeware so that I can
> > download it and try it now!)?
>
> With NURBS modelling programs you get what you pay for but if my
> info is correct MOPS might be good for getting a feeling for
> NURBS modelling and it's free.
>
> http://www.informatik.uni-rostock.de/~rschultz/mops/
>
> --
> Ken Tyler - 1400+ POV-Ray, Graphics, 3D Rendering, and Raytracing Links:
> http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/
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Saadat Saeed wrote:
>
> I heard that rhino is a good modeeler for NURBs is that correct. Is that
> worth the pricetag though??
Many seem to think so. If I could afford it I would be tempted...
--
Ken Tyler - 1400+ POV-Ray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/
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Saadat Saeed wrote:
>
> I heard that rhino is a good modeeler for NURBs is that correct. Is that
> worth the pricetag though??
>
You can decide by yourself, as there is FREE trial version downloadable
(you can run it 20 times, after that it doesn't save, IIRC). Go to
http://www.rhino3d.com
But I would say, that it is well worth of price (especially if you are a
student).
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Your are right in saying that POV can render anything.
It has more power then even ElectricImage, it's just that it can be REALLY
*REALLY* hard!
David McCabe
dav### [at] maccom
> From: Phil Clute <pcl### [at] tiacnet>
> Newsgroups: povray.newusers
> Date: Fri, 19 May 2000 02:09:58 -0400
> Subject: Re: How do i render human models??
>
>> Try Spatch.. it think there is a tutorial somewhere on modelling human
>> heads using Spatch... after that use povray to render them!
>
> http://www.geocities.com/SoHo/Studios/7415/
>
> ...and you can pick up sPatch here:
> http://www.tiac.net/users/pclute/spatch.htm
>
> --
> Phil
> ...coffee?...yes please! extra sugar,extra cream...Thank you.
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