Instructions: click anywhere on the screen. Click at least three times for "interesting behavior".
More instructions and explanations coming soon!
source:
Web viewable
Java files

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license: http://www.gnu.org/copyleft/gpl.html
however, the library used for Convex Hull generation is part of a larger Java GIS package from
Vivid Solutions
and is licensed under LGPL, see http://www.gnu.org/copyleft/lesser.html