kicad-developers team mailing list archive

[Tomasz Wlostowski <tomasz.wlostowski@xxxxxxx>]

On 14.09.2016 00:00, Cirilo Bernardo wrote:
> I think it would be nice to support Bezier curves but aside from adding
> support for editing those curves, I think we need a good enough 2D
> geometry kernel so that we can improve zone outlines and perhaps
> even allow tracks to be straight, arc, or Bezier curve. In general though
> I think good support for "PolyLine" would be of more general use; after
> all any 2D Bezier curve can be easily approximated with a series of
> circular arcs (which a Polyline can do).

Cirilo, JP,

I agree we need copper layer arc support. I'm reluctant to add Bezier
curves unless they are approximated as polylines because of the
complexity of necessary DRC functions. Writing an accurate arc-to-arc or
arc-to-segment collision/distance check is already quite difficult.

Besides, what would be the use of such curves for PCB design other than
fancy graphics (silkscreen, etc)?

Tom


> 
> - Cirilo
> 
> 
> On Wed, Sep 14, 2016 at 4:03 AM, jp charras <jp.charras@xxxxxxxxxx
> <mailto:jp.charras@xxxxxxxxxx>> wrote:
> 
>     Le 13/09/2016 à 11:36, Tomasz Wlostowski a écrit :
>     > Hi all,
>     >
>     > Looking at the sources of the DRAWSEGMENT class (with the hopes of
>     > refactoring it a bit to enable arbitrary copper shapes), I noticed that
>     > it supports Bezier curves. They are also supported by the file format
>     > parser/writer. There's however no drawing tool for these. Is this some
>     > outdated code that can be removed or do we plan to support Bezier curves
>     > in PCBnew?
>     >
>     > Cheers,
>     > Tom
> 
>     In fact, this is not an outdated code, but a not-yet-used code.
>     A long time ago, we planned to support Bezier curves in Kicad, but
>     this is still on a todo list.
> 
>     --
>     Jean-Pierre CHARRAS
> 
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