Re: gEDA-user: more on clipping

[Harry Eaton <bumpelo@xxxxxxxxxxx>]

David Carr wrote:

> Just curious,
>
> How are you handling arcs in the polygons?  Are you using line 
> segments as an approximation or are you actually using an arc 
> primitive?  If you are using line segments, does the number of 
> segments vary on the diameter or is it fixed?
>
> Your 100K vertex comment made me curious.

Arcs are approximated by line segments; there is a fixed number - each 
segment spans 10 degrees. Thus there are 36 segments in a circle (such 
as a via clearance). Lines have rounded ends so clearance around lines 
also have 36 segments.

h.




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