Aabb3.centerAndHalfExtents constructor

Aabb3.centerAndHalfExtents(Vector3 center, Vector3 halfExtents)

Create a new AABB with a center and halfExtents.

Implementation 

factory Aabb3.centerAndHalfExtents(Vector3 center, Vector3 halfExtents) =>
    new Aabb3()..setCenterAndHalfExtents(center, halfExtents);