2014-03-12 Two interactive explanations of a 2d visibility algorithm via jj@all2one COLLISION Two interactive explanations of a 2d visibility algorithm via jj@all2one http://www.redblobgames.com/articles/visibility/ http://ncase.github.io/sight-and-light/ Memo in Japanese 2D の可視性のアルゴリズムのデモです.