POV-Ray : Newsgroups : povray.binaries.images : Celtic knots : Re: Celtic knots Server Time22 May 2024 02:11:49 EDT (-0400)
 Re: Celtic knots
 From: Paolo Gibellini Date: 27 Dec 2021 06:28:07 Message: <61c9a347@news.povray.org>
```
{
"@context": "https://schema.org",
"@type": "DiscussionForumPosting",
"@id": "#61c9a347%40news.povray.org",
"dateCreated": "2021-12-27T11:28:07+00:00",
"datePublished": "2021-12-27T11:28:07+00:00",
"author": {
"@type": "Person",
"name": "Paolo Gibellini"
}
}
Il 22/12/2021 14:54, Mediat ha scritto:
> Hi every one
>
> To learn about Celtic knot : https://en.wikipedia.org/wiki/Celtic_knot
>
> Basically, to draw a celtic knot you need to handle 4 different
shapes (the
> building blocks) that we call "brick":
>
> 1) the "corner" (from the center of a side to the center of an
> which exists in two different directions.
> 2) the "straight" (from the center of a side to the center of the
opposite side)
> which exists in two different directions.
> 3) the "diagonal" (from a vertex to the opposite vertex) which exists
in two
> different directions.
> 4) the "bend" (from a vertex to the center of a non adjacent side)
which exists
> in eight different directions/symmetries.
>
> In my generator I designed 8 different types of straights and
diagonals, 4
> different types of corners and 4 different types of bends.
>
> I added to the previous bricks,
> 1) 5 different types of "crossings" (the way the cords crosses), one
of them is
> the historical crossing: one cord goes over the other one.
> 2) 5 different types of "muffs"  (the way a bend connects to another
brick on
> its ends tha lies on a side)
>
> Before I publish the program I'm eager to answer questions and more
than that,
> to read remarks and requests.
>
> For the time being the program deals only with rectangular shapes, it
should be
> feasible to enhance it to handle rectangular shapes with rectangular
holes, but
> not to handle circles or triangles.

A very nice work!
The flat crossings seem more realistic, are you also able to rise up the
crossings of the cylindrical ropes?

Paolo
```