libhacd2.81 2.81-rev2613+dfsg-3 (amd64 binary) in ubuntu saucy

 Bullet professional 3D Game Multiphysics Library provides state of the art
 collision detection, soft body and rigid body dynamics.
 .
 This package contains the HACD shared library. HACD stands for Hierarchical
 Approximate Convex Decomposition and provides a sophisticated algorithm who
 can, in a CPU efficient way, compute a faithful approximation of the original
 mesh.
 .
 For more information about Bullet, please refer to the libbullet-dev package.