POV-Ray : Newsgroups : povray.binaries.images : KnotPlot Splines and Ropes Server Time
9 Aug 2024 01:28:43 EDT (-0400)
  KnotPlot Splines and Ropes (Message 1 to 6 of 6)  
From: Dave Matthews
Subject: KnotPlot Splines and Ropes
Date: 14 Mar 2005 12:45:52
Message: <4235cdd0@news.povray.org>
The first image was made by lifting a spline from KnotPlot and running 
it through Mike Williams' Ropes2.inc file: 
http://www.econym.demon.co.uk/pov/rope.htm

I'm still puzzling over getting the twistiness right so that it lines up 
at the bottom.  Trial and error got me close.

The second is a blob thing made from the 4 edge splines from KnotPlot. 
(See the other knotplot spline post above).

Dave Matthews


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Attachments:
Download 'celticrope06.jpg' (33 KB) Download 'sp_b_04_02bs.jpg' (82 KB)

Preview of image 'celticrope06.jpg'
celticrope06.jpg

Preview of image 'sp_b_04_02bs.jpg'
sp_b_04_02bs.jpg


 

From: Dave Matthews
Subject: Re: KnotPlot Splines and Ropes
Date: 14 Mar 2005 18:36:41
Message: <42362009@news.povray.org>
Dave Matthews wrote:


> The second is a blob thing made from the 4 edge splines from KnotPlot. 

 From a different knot (obviously.)  A sample is now available in PBSF

Dave Matthews


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From: Thomas de Groot
Subject: Re: KnotPlot Splines and Ropes
Date: 15 Mar 2005 03:12:11
Message: <423698db@news.povray.org>
"Dave Matthews" <ns### [at] nospamedu> schreef in bericht
news:4235cdd0@news.povray.org...
> The first image was made by lifting a spline from KnotPlot and running
> it through Mike Williams' Ropes2.inc file:
> http://www.econym.demon.co.uk/pov/rope.htm
>
> I'm still puzzling over getting the twistiness right so that it lines up
> at the bottom.  Trial and error got me close.
>
> The second is a blob thing made from the 4 edge splines from KnotPlot.
> (See the other knotplot spline post above).
>
> Dave Matthews
>
I have not have had time yet to try out KnotPlot, but your results are
impressive. Very good work!

Thomas


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From: Florian Brucker
Subject: Re: KnotPlot Splines and Ropes
Date: 15 Mar 2005 08:42:47
Message: <4236e657$1@news.povray.org>
Very cool stuff! I especially like that twisted thing in the second image.

Keep up the good work!

Florian


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From: Dave Matthews
Subject: Re: KnotPlot Splines and Ropes
Date: 15 Mar 2005 10:45:00
Message: <web.4237023a7c8b21dd8c7259570@news.povray.org>
"Thomas de Groot" <t.d### [at] internlnet> wrote:
> I have not have had time yet to try out KnotPlot, but your results are
> impressive. Very good work!
>
> Thomas

Thanks! And as Maurice pointed out (in pov.general) and I had forgotten,
KnotPlot uses right-hand coordinates, so you have to scale by <-1,1,1> (or
<1, -1, 1> or <1, 1, -1>), then rotate by 90 degrees to fix it in POVRay.
My 10 year old just loves KnotPlot -- it's that easy to use.

Dave Matthews


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From: Dave Matthews
Subject: Re: KnotPlot Splines and Ropes
Date: 15 Mar 2005 10:45:00
Message: <web.423702557c8b21dd8c7259570@news.povray.org>
Florian Brucker <tor### [at] torfboldcom> wrote:
> Very cool stuff! I especially like that twisted thing in the second image.
>
> Keep up the good work!
>
> Florian

Thanks!


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