November 24th, 2016, 05:05 AM  #1 
Newbie Joined: Nov 2016 From: Germany Posts: 1 Thanks: 0  Minkowski Sum Algorithm
I am trying to program the following algorithm to calculate the Minkowski sum of two convex polygons: (Taken from Computational Geometry Algorithms and Applications (ISBN 9783540779742) (Year 2008, Page 295)) It already works for simple polygons, but when I have something like this the condition to end the loop is never reached. The thing is, beta (2*PI) is always bigger than every angle of the wPolygon. So according to the algorithm, only j gets increased in every iteration (i can never reach n+1). I could assume that beta is 0, but then alpha will always be the biggest angle and the loop's end condition will never be reached too. What I am I missing? Last edited by skipjack; December 30th, 2016 at 10:29 AM. 
December 30th, 2016, 10:29 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 16,949 Thanks: 1255 
Do you still need help on this?


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algorithm, minkowski, sum 
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