def construct(self, with_words):
CycloidScene.construct(self)
randy = Randolph()
randy.scale(RANDY_SCALE_VAL)
randy.shift(-randy.get_bottom())
central_randy = randy.copy()
start_randy = self.adjust_mobject_to_index(
randy.copy(), 1, self.cycloid.points
)
if with_words:
words1 = TextMobject("Trajectory due to gravity")
arrow = TexMobject("\\leftrightarrow")
words2 = TextMobject("Trajectory due \\emph{constantly} rotating wheel")
words1.next_to(arrow, LEFT)
words2.next_to(arrow, RIGHT)
words = Mobject(words1, arrow, words2)
words.scale_to_fit_width(2*SPACE_WIDTH-1)
words.to_edge(UP, buff = 0.2)
words.to_edge(LEFT)
self.play(ShowCreation(self.cycloid.copy()))
self.slide(randy, self.cycloid)
self.add(self.slider)
self.dither()
self.grow_parts()
self.draw_cycloid()
self.dither()
self.play(Transform(self.slider, start_randy))
self.dither()
self.roll_back()
self.dither()
if with_words:
self.play(*map(ShimmerIn, [words1, arrow, words2]))
self.dither()
self.remove(self.circle)
start_time = len(self.frames)*self.frame_duration
self.remove(self.slider)
self.slide(central_randy, self.cycloid)
end_time = len(self.frames)*self.frame_duration
self.play_over_time_range(
start_time,
end_time,
RollAlongVector(
self.circle,
self.cycloid.points[-1]-self.cycloid.points[0],
run_time = end_time-start_time,
rate_func = None
)
)
self.add(self.circle, self.slider)
self.dither()
def construct(self, with_words):
CycloidScene.construct(self)
randy = Randolph()
randy.scale(RANDY_SCALE_FACTOR)
randy.shift(-randy.get_bottom())
central_randy = randy.copy()
start_randy = self.adjust_mobject_to_index(
randy.copy(), 1, self.cycloid.points
)
if with_words:
words1 = TextMobject("Trajectory due to gravity")
arrow = TexMobject("\\leftrightarrow")
words2 = TextMobject("Trajectory due \\emph{constantly} rotating wheel")
words1.next_to(arrow, LEFT)
words2.next_to(arrow, RIGHT)
words = Mobject(words1, arrow, words2)
words.scale_to_fit_width(2*SPACE_WIDTH-1)
words.to_edge(UP, buff = 0.2)
words.to_edge(LEFT)
self.play(ShowCreation(self.cycloid.copy()))
self.slide(randy, self.cycloid)
self.add(self.slider)
self.wait()
self.grow_parts()
self.draw_cycloid()
self.wait()
self.play(Transform(self.slider, start_randy))
self.wait()
self.roll_back()
self.wait()
if with_words:
self.play(*map(ShimmerIn, [words1, arrow, words2]))
self.wait()
self.remove(self.circle)
start_time = len(self.frames)*self.frame_duration
self.remove(self.slider)
self.slide(central_randy, self.cycloid)
end_time = len(self.frames)*self.frame_duration
self.play_over_time_range(
start_time,
end_time,
RollAlongVector(
self.circle,
self.cycloid.points[-1]-self.cycloid.points[0],
run_time = end_time-start_time,
rate_func = None
)
)
self.add(self.circle, self.slider)
self.wait()
