GOPack computes circle packings, which are configurations of circles with prescribed patterns of tangency (not to be confused with 2D sphere packing). It is a linearized algorithm capable of quickly computing maximal circle packings and certain polygonal circle packings involving many hundreds of thousands of circles. It was developed by C. Collins, G. Orick, and K. Stephenson. Output is suitable for further manipulation in the Java package "CirclePack" available from Stephenson's web site.
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