Physics Initialization - Learning Game Physics with Bullet Physics and OpenGL - page 42

much less expensive than performing AABB overlap checks on every pair, every it-
eration. You may recognize this tree structure as a simple binary tree:
This is no coincidence. The intent is to use the simplicity and speed of searching a
binary tree in order to quickly asses which objects are closest to others.
A btBroadPhaseInterface object is needed to tell our world object what tech-
nique to use for its broad phase collision detection and the built-in type we will be
using is btDbvtBroadphase .
The collision configuration
This is a relatively simple component on the surface, but under the hood it provides
the physics simulation with components that handle essential tasks such as determ-