3b1b-manim/docs/example.py
2021-01-25 19:53:44 +08:00

37 lines
1.2 KiB
Python

from manimlib.imports import *
class SquareToCircle(Scene):
def construct(self):
circle = Circle()
circle.set_fill(BLUE, opacity=0.5)
circle.set_stroke(BLUE_E, width=4)
square = Square()
self.play(ShowCreation(square))
self.wait()
self.play(ReplacementTransform(square, circle))
self.wait()
# Try typing the following lines
# self.play(circle.stretch, 4, {"dim": 0})
# self.play(Rotate(circle, TAU / 4))
# self.play(circle.shift, 2 * RIGHT, circle.scale, 0.25)
# circle.insert_n_curves(10)
# self.play(circle.apply_complex_function, lambda z: z**2)
class SquareToCircleEmbed(Scene):
def construct(self):
circle = Circle()
circle.set_fill(BLUE, opacity=0.5)
circle.set_stroke(BLUE_E, width=4)
self.add(circle)
self.wait()
self.play(circle.stretch, 4, {"dim": 0})
self.wait(1.5)
self.play(Rotate(circle, TAU / 4))
self.wait(1.5)
self.play(circle.shift, 2 * RIGHT, circle.scale, 0.25)
self.wait(1.5)
circle.insert_n_curves(10)
self.play(circle.apply_complex_function, lambda z: z**2)
self.wait(2)