> hi, did you find this?
> http://matplotlib.sourceforge.net/faq/howto_faq.html?highlight=codex%20nxutils#test-whether-a-point-is-inside-a-polygon
I used the search function but no, i didn't find that link :) Shame on me and
thank you Brent.
Looking at the implementation, it's really simple and i will do without
matplotlib altogether and roll my own. In case anyone else needs this, the code
is:
def insidePoly(x, y, xs, ys):
"""Decide whether point (x, y) lies inside the 2d polygon defined by its
vertices zip(xs, ys).
"""
result = False
for now in xrange(len(xs)):
if (ys[now] < y and ys[now - 1] >= y) or (ys[now - 1] < y and ys[now]
>= y):
if xs[now] + 1.0 * (y - ys[now]) * (xs[now - 1] - xs[now]) /
(ys[now - 1] - ys[now]) < x:
result = not result
return result
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