def center(self):
"""Returns the center of this rectangle, calculated to be the point of intersection of its diagonals."""
v = self.vertices
x, y = 0, 0
for pt in v:
x += pt.x
y += pt.y
if TwoDPoint.midpoint(v[0], v[2]) == TwoDPoint.midpoint(v[1], v[3]):
return TwoDPoint.midpoint(v[0], v[2])
else:
return TwoDPoint(x/4, y/4)
def test_midpoint(self):
self.assertEqual(TwoDPoint.midpoint(self.point1, self.point3),
TwoDPoint(2.5, 0))
self.assertEqual(TwoDPoint.midpoint(self.point1, self.point2),
TwoDPoint(.5, 1))
