Shi, I've just seen 3 queries from you all along the lines of -
why the following code does not work? <code> If English is not your first language, I can understand you're not going to write us a novel. However, you'll get a better response if you copy and paste the error message (the traceback) that you're getting in the console. Do you know how to copy and paste from the console? A lot of us aren't anywhere we can run your code; if we did, it may work, the error may not be an unhandled exception, just unexpected behaviour, and we have no idea what behaviour you're expecting. So please, in future give us this basic information - If there's an error message - copy and paste the error message If there is no error message - tell us what you expected to happen, and what happened instead. Regards, Liam Clarke On 11/7/05, Shi Mu <[EMAIL PROTECTED]> wrote: > why the following code does not work? > > # 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 > min(p1y,p2y): > if y <= max(p1y,p2y): > if x <= max(p1x,p2x): > if p1y != p2y: > xinters = (y-p1y)*(p2x-p1x)/(p2y-p1y)+p1x > if p1x == p2x or x <= xinters: > inside = not inside > p1x,p1y = p2x,p2y > > return inside > > if __name__ == '__main__': > print 'Simple pointInPoly() test...' > > poly = [(-1,-1), (6,-1), (5,6), (0,5)] > point_inside_polygon(3,10,poly) > _______________________________________________ > Tutor maillist - [email protected] > http://mail.python.org/mailman/listinfo/tutor > _______________________________________________ Tutor maillist - [email protected] http://mail.python.org/mailman/listinfo/tutor
