btBroadphaseInterface::rayTest specification

[Motherbrain]

I'm new to Bullet Physics and I'm trying to understand the following function:

Code: Select all

virtual void btBroadphaseInterface::rayTest(
	const btVector3 & rayFrom,
	const btVector3 & rayTo,
	btBroadphaseRayCallback & rayCallback,
	const btVector3 & aabbMin = btVector3(0, 0, 0),
	const btVector3 & aabbMax = btVector3(0, 0, 0)
)

How are the last two parameters, aabbMin and aabbMax, used?

[Erwin Coumans]

The rayTest can optionally perform a swept AABB test (rather than just sweeping a point).
This can be useful to accelerate linearly swept volume queries, for example the btCollisionWorld::convexSweepTest uses this interface.

Note that most users don't need to worry about this internal interface, unless you (re) implement your own broadphase and you want to support swept queries.