"For a long time, roboticists have used DC [direct current] motors to make robots move," says Mike Tolley at the University of California San Diego.
A quadtree reduces this: rebuild the tree each frame, and for each object, query only the nearby region. Objects in distant quadrants are never compared.，更多细节参见同城约会
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Kali HaysTechnology reporter
Трамп высказался о непростом решении по Ирану09:14，详情可参考heLLoword翻译官方下载