def testIsBehind(self):
'''
is_behind - a plane has passed a given point
'''
TO_TEST = [((1,0,0), (0,0,0), (2, 0, 0), False),
((1,0,0), (2,0,0), (1, 0, 0), True),
((1,1,0), (2,0,0), (4, 6, 0), False),
((-1,-1,0), (0,0,0), (1, 1, 0), True),
]
for vel, pos, tar, res in TO_TEST:
vel, pos, tar = [Vector3(*el) for el in (vel, pos, tar)]
self.assertEqual(U.is_behind(vel, pos, tar), res)
def check_overshot(self, point):
'''
Return True if the plane has overshot (i.e. flown past) the ``point``.
'''
return U.is_behind(self.plane.velocity, self.plane.position, point)