public void testDistanceBetweenTwoPoints() {
		double distance = MathUtils.distanceBetweenTwoPoints(0, 0, 3, 3);
		assertEquals(Math.sqrt(18), distance, 0);
		
		distance = MathUtils.distanceBetweenTwoPoints(0, 0, 0, 0);
		assertEquals(0, distance, 0);
		
		distance = MathUtils.distanceBetweenTwoPoints(1, 1, 3, 3);
		assertEquals(Math.sqrt(8), distance, 0);
		
		distance = MathUtils.distanceBetweenTwoPoints(-1, -1, 3, 3);
		assertEquals(Math.sqrt(32), distance, 0);
	}