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slide2.py
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slide2.py
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from gruvbox_manim import gruvbox
from manim import *
from manim_revealjs import PresentationScene
class Slide2(PresentationScene):
def construct(self):
title = Tex(r"What is $\pi$?", color = gruvbox.SECONDARY).scale(2)
self.add(title)
self.play(title.animate.to_edge(UP, buff=0.5))
circle = Circle(color=gruvbox.FG, stroke_width=3, radius=1).scale(2).to_edge(RIGHT, buff=1)
diameter = Line(circle.get_left(), circle.get_right(), color=gruvbox.PRIMARY, stroke_width=3)
d = Tex(r"$d$", color = gruvbox.PRIMARY).next_to(diameter, DOWN, buff=0.1)
dg = VGroup(diameter, d)
text = Tex(r"$\pi$ is the ratio of a circle's \\ circumference to its diameter.", color = gruvbox.FG).scale(1).to_edge(LEFT, buff=0.5)
self.play(
LaggedStart(
Create(circle),
AnimationGroup(
Create(diameter),
Write(d)
),
lag_ratio=0.3
),
Write(text)
)
self.end_fragment()
dg2 = dg.copy().move_to(ORIGIN).to_edge(DOWN, buff=1)
self.play(TransformFromCopy(dg, dg2))
self.end_fragment()
dgc = dg2.copy().set_z_index(1)
dgc[0].scale(PI).to_edge(LEFT).set_color(gruvbox.SECONDARY)
dgc[1].become(Tex(r"$\pi d$", color = gruvbox.SECONDARY).next_to(dgc[0], DOWN, buff=0.1))
self.play(Transform(dg2, dgc), run_time=1)
self.end_fragment()
self.play(Transform(dg2[0], circle.copy().set_color(gruvbox.SECONDARY)), dg2[1].animate.next_to(circle, DOWN, buff=0.1), run_time=2)
self.end_fragment()
formula = MathTex(r"C = \pi d", color = gruvbox.CYAN).scale(1.5).next_to(text, DOWN, buff=0.5)
self.play(Write(formula[0][:2]), Transform(dg2[1][0].copy(), formula[0][2:]), run_time=1)
self.end_fragment()