[Jprogramming] Polygon containment

[Boyko Bantchev]

On 26 April 2010 17:58, R.E. Boss <r.e.boss at planet.nl> wrote:
> ...
> 1. if 0 0 is not in the polygon, subtract (+/ % #)PLG from PLG and PTS

It seems like we'll have to solve for 0 0 the problem that we are
trying to solve in the first place.

> Some investigation has to be done whether W2 also works for more uncommon
> polygons, like with intersections.

It does not work even for lots of simple polygons:
   (4 2$_10 0 9 _5 _8 0 9 5) W2 0 0
1