// move box2 by 1.0 + twice the envelope + epsilon
// this will make bounding boxes only just separated
b2.setPosition(0,0,1.0+2*env+epsilon);
// expect no overlap
sweep.run();
assertTrue( !sweep.getOverlappingPairs().contains(new Pair<Geometry>(box1,box2)) );
// move box2 by 1 + 2 env - epsilon
// such that boxes will only just overlap by epsilon
b2.setPosition(new Vector3(0,0,1.0+2*env-epsilon));