fromBox3( box3 ) {

		box3.getCenter( this.center );

		box3.getSize( this.halfSize ).multiplyScalar( 0.5 );

		this.rotation.identity();

		return this;

	}
Defines an OBB based on the given AABB.

@param {Box3} box3 - The AABB to setup the OBB from.
@return {OBB} A reference of this OBB.