def test_distance_a_b(self):
assert math.isclose(Point.distance(Point(1, 0), Point(0, 1)),
math.sqrt(2))
def _get_length(self):
return Point.distance(self.start, self.end)
def rotate_from_center(c, p, phi):
radius = Point.distance(c, p)
x = radius * math.cos(phi)
y = radius * math.sin(phi)
rotated = Point(x, y) + c
return rotated