detección de colisiones
Abril 16, 2008
http://chrishecker.com/images/e/e7/Gdmphys3.pdf
ftp://ftp.cs.unc.edu/pub/users/manocha/PAPERS/COLLISION/sig96.pdf
jmonkey
http://www.jmonkeyengine.com/wiki/doku.php?id=collision_calculations
http://www.jmonkeyengine.com/wiki/doku.php?id=boundingvolume
http://www.jmonkeyengine.com/wiki/doku.php?id=obbtree
