POV-Ray : Newsgroups : povray.advanced-users : Smooth, continuous Bezier splines (again) : Re: Smooth, continuous Bezier splines (again) Server Time
14 Mar 2025 08:05:43 EDT (-0400)
  Re: Smooth, continuous Bezier splines (again)  
From: Tor Olav Kristensen
Date: 1 Mar 2025 11:40:00
Message: <web.67c337f896675d9f43a63f5189db30a9@news.povray.org>
"Bald Eagle" <cre### [at] netscapenet> wrote:
> That approach was also close to what I was doing, however it doesn't match the
> curvature of the spline segments at the endpoints.
>
> Visually, it still looked too flat-then rounded-then flat-then rounded....
>
> Although I didn't pore over your code yet, I quickly skimmed it to see where the
> control points were calculated, and then bolted on my curvature comb code to
> visualize the curvature over all of the spline segments.
>
> You can see where the mismatches are.
>
> So I still think I have to degree elevate and then I can mirror the additional
> control points to get the curvature to match.
>
> (Also, FYI: the point/tip is actually a hard point.  So 2 separate composite
> splines - 1 on the left and 1 on the right)
>
> I'll see if I have enough time to patch in my degree elevation code and extend
> the control-point mirroring that one extra "level" into the splines.

It is interesting to see the discontinuities visualized like this.

Have you also made similar tools for working with curved surfaces?

--
Tor Olav
http://subcube.com
https://github.com/t-o-k


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