In my recent commit, I removed Kbool from Kicad, and replaced it by Clipper.
See http://www.angusj.com/delphi/clipper.php
Currently, to handle polygons (mainly for zones), I am using boost::polygon and
Clipper.
Clipper is, by far, more easier to use than Kbool, needs very few code to be used, has a better license ( BOOST libraries
license), and is currently actively maintained.
It is currently used only to normalize polygons, i.e. to convert self
intersecting polygons to simple polygons,
which is not possible with boost::polygon.
The best is to use only one library for polygons, but it is currently not
possible.
Each library (boost::polygon and clipper) has advantages and drawbacks.
I also made a very serious code cleanup in polygon functions (obscure and dead
code removed).
I hope it do not break Pcbnew.
I am thinking a good support of polygons is very important for Kicad.
--
Jean-Pierre CHARRAS
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