Deciding if a Point is Inside a Polygon - Pure Python
This is not a particularly tricky problem, but there wasn't a Python solution on the net when I went looking. I've simply adapted some C code I found at this excellent page. # determine if a point is inside a given polygon or not # Polygon is a list of (x,y) pairs. def point_inside_polygon(x,y,poly): n = len(poly) inside =False p1x,p1y = poly[0] for i in range(n+1): p2x,p2y = poly[i % n] if y > mi
Determining Whether A Point Is Inside A Complex Polygon
Point-In-Polygon Algorithm — Determining Whether A Point Is Inside A Complex Polygon © 1998,2006,2007 Darel Rex Finley. This complete article, unmodified, may be freely distributed for educational purposes. Visit the new page which adds spline curves to this technique! Also visit the shortest-path-through-polygon page! Figure 1 Figure 1 demonstrates a typical case of a severely concave polygon wit
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