>
> Is the area for non convex polygon implemented ?
>
>
> Yes. Polgons have a signed area, ccw is positive:
>>> Polygon(*[Point(w) for w in [(0,0),(2,0),(2,1),(1,0),(0,1)]]).area
1
>>> Polygon(*[Point(w) for w in
[(0,0),(1,0),(1,1),(0,1),(S.Half/2,S.Half),(S.Ha
lf,S.Half),(S.Half,S.Half/2),(S.Half/2,S.Half/2),(S.Half/2,S.Half),(0,1)]]).area
15/16
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