Angle

def betweenTwoAngles(A,B,x):
    #The semicircle moves from A to B
    #The range for A, B and x are -math.pi to math.pi
    tau = math.pi*2
    if A < 0:
        A += tau
    if B < 0:
        B += tau
    if x < 0:
        x += tau
    B -= A
    x -= A
    A = 0
    if x <= B and x > 0:
        return True
    return False