topic Re: Circle2 resolution via gdl in GDL

Circle2 resolution via gdl

jc4d — Tue, 04 Jul 2023 12:17:07 GMT

Hello, is there a way to reduce the circle2's resolution in 2D using gdl?

Cheers,
Juan

Re: Circle2 resolution via gdl

Barry Kelly — Mon, 08 Aug 2022 10:00:04 GMT

Have you tried the RESOL command?

Barry.

Re: Circle2 resolution via gdl

jc4d — Mon, 08 Aug 2022 10:11:54 GMT

Yes, but no change.. not sure if today is one of those days 😏

BTW, I'm on AC24

Juan

Re: Circle2 resolution via gdl

Barry Kelly — Mon, 08 Aug 2022 10:22:18 GMT

I could have sworn that works.

Mentions arcs and circles in the GDL reference guide.

Seems to only work with polygons.

RESOL 6 poly2_ 2,3, 0,0,903, 1,360,4007

Barry.

Re: Circle2 resolution via gdl

jc4d — Mon, 08 Aug 2022 10:25:07 GMT

That's exactly my confussion here since the reference guide states arcs and circles can use that function.
Would it be possible to reach the team to either fix the reference guide and/or report a bug?

Juan

Re: Circle2 resolution via gdl

Barry Kelly — Mon, 08 Aug 2022 13:35:39 GMT

@jc4d wrote:

That's exactly my confussion here since the reference guide states arcs and circles can use that function.
Would it be possible to reach the team to either fix the reference guide and/or report a bug?

After reading the manual again, it says circles are converted to regular polygons.

It does not specifically mention CIRCLE2 & ARC2.

At the beginning of that section on Attributes, it says ...

ATTRIBUTES
In the first part of this chapter, directives influencing the interpretation of GDL statements are presented. Directives may define the smoothness
used for cylindrical elements, representation mode in the 3D view or the assignment of an attribute (color, material, text style, etc.) for the
subsequent shapes.

So I think this is only for 3D elements.

However I also think that because it says ...

And it clearly works for POLY2_ commands - which is a 2D command - not a 3D POLY_ command.

I think it is a fair assumption that as it mentions circles and arcs are converted to polylines that it would convert CIRCLE2 and ARC2 to POLY2.

Maybe @Peter Baksa could please clarify?

Barry.

Re: Circle2 resolution via gdl

Peter Baksa — Fri, 26 Aug 2022 09:35:30 GMT

Hi,

The main statement here is "for cylindrical elements and arcs in polylines".

Mentioning circles after that intended to refer to 360° arcs in polylines.

It seems the 3d circle counts as a cylindrical element.

Re: Circle2 resolution via gdl

lszatmary — Sat, 24 Sep 2022 17:38:18 GMT

Hi,

a workaround can be if you use stack for the circle's segment points, something like this:

rad = 0.1 nSegments = 16 angleSegment= 360 / nSegments for i = 1 to nSegments put rad * cos(i * angleSegment), rad * sin(i * angleSegment), 1 next i poly2_b nsp/3, 7, 1, 1, get(nsp)

Re: Circle2 resolution via gdl

jc4d — Wed, 21 Sep 2022 05:01:34 GMT

Interesting approach, thank you 👍