def draw(self, canvas):
pygame.draw.circle(canvas, (0, 0, 255), self.pos, 15)
# traza
draw_vector(canvas, GREEN, Vector2(0, 0), self.pos)
draw_vector(canvas, RED, self.pos,
self.pos + self.vel * self.speed * 10)
def test_theta_zero_degrees():
v = Vector2(1, 0)
assert v.theta == 0
def __init__(self, size):
self.box = Rect((0, 0), size)
self.pos = Vector2(*self.box.center)
self.vel = Vector2.random_unit()
self.speed = random.randrange(3, 10)