question: @ MediumTest public void testStabilityInSpace ( ) { long t = System . currentTimeMillis ( ) ; VelocityTracker vt = VelocityTracker . obtain ( ) ; drag ( vt , 100 , 200 , 100 , 200 , 10 , t , 400 ) ; vt . computeCurrentVelocity ( 1 ) ; float firstX = vt . getXVelocity ( ) ; float firstY = vt . getYVelocity ( ) ; vt . clear ( ) ; drag ( vt , 200 , 300 , 200 , 300 , 10 , t , 400 ) ; vt . computeCurrentVelocity ( 1 ) ; float secondX = vt . getXVelocity ( ) ; float secondY = vt . getYVelocity ( ) ; assertEqualFuzzy ( firstX , secondX , 0.1f ) ; assertEqualFuzzy ( firstY , secondY , 0.1f ) ; vt . recycle ( ) ; }
target:  Velocity is independent of the position of the events, it only depends on their relative distance.