quadtree - Recursively using 2 cutting planes to subdivide space.
Used for image/model storage and visibility determination (i.e. terrain rendering.)
See also: Spatial-partioning, Binary Space-Partitioning Trees (BSP), and Octrees
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дс тдрлими цюлютдажкию дроемжки аиакиохдйис лидр
http://www.gamedev.net/dict/reference/3d/article316.asp;
