def get_bbox(self):
start=vector.add(self.pos, vector.multipy(self.size, -0.5))
end=vector.add(self.pos, vector.multipy(self.size, +0.5))
return start+end
def test_multiply_vector(self):
result=vector.multipy((10,20), 4)
self.assertEqual(result, (40, 80))
def __init__(self, pos, velocity, radius):
self.pos=pos
self.velocity=velocity
self.size=vector.multipy((radius, radius), 2)
