def construct(self):
number_line = NumberLine(x_min=-2, x_max=2)
triangle = RegularPolygon(3, start_angle=-PI / 2) \
.scale(0.2) \
.next_to(number_line.get_left(), UP, buff=SMALL_BUFF)
numbers = VGroup(
*[TextMobject("%s" % i) \
.next_to(number_line.get_tick(i - 2), DOWN) for i in range(1, 5)]
)
self.add(number_line)
self.play(ShowCreation(triangle))
self.wait(0.3)
self.play(
ApplyMethod(triangle.shift,
RIGHT * 4,
rate_func=linear,
run_time=4),
*[
AnimationGroup(Animation(Mobject(), run_time=i + 1),
Write(numbers[i]),
lag_ratio=1) for i in range(4)
],
)
self.wait()
def construct(self):
number_line = NumberLine(x_min=-2, x_max=2)
triangle = RegularPolygon(3, start_angle=-PI / 2) \
.scale(0.2) \
.next_to(number_line.get_left(), UP, buff=SMALL_BUFF)
text_1 = TextMobject("1") \
.next_to(number_line.get_tick(-1), DOWN)
text_2 = TextMobject("2") \
.next_to(number_line.get_tick(0), DOWN)
text_3 = TextMobject("3") \
.next_to(number_line.get_tick(1), DOWN)
text_4 = TextMobject("4") \
.next_to(number_line.get_tick(2), DOWN)
self.add(number_line)
self.play(ShowCreation(triangle))
self.wait(0.3)
self.play(
ApplyMethod(triangle.shift,
RIGHT * 4,
rate_func=linear,
run_time=4),
AnimationGroup(Animation(Mobject(), run_time=1),
Write(text_1),
lag_ratio=1),
AnimationGroup(Animation(Mobject(), run_time=2),
Write(text_2),
lag_ratio=1),
AnimationGroup(Animation(Mobject(), run_time=3),
Write(text_3),
lag_ratio=1),
AnimationGroup(Animation(Mobject(), run_time=4),
Write(text_4),
lag_ratio=1))
self.wait()
