scene.py

from manim import *

# To run the scenes below, use command `uv run manim -pql scene.py SquareToCircle`
# `ql` for low quality for prototyping, `qh` for 60 fps 1080p render

class SquareToCircle(Scene):
    def construct(self):
        circle = Circle()  # create a circle
        circle.set_fill(PINK, opacity=0.5)  # set color and transparency

        square = Square()  # create a square
        square.rotate(PI / 4)  # rotate a certain amount

        self.play(Create(square))  # animate the creation of the square
        self.play(Transform(square, circle))  # interpolate the square into the circle
        self.play(FadeOut(square))  # fade out animation

class SquareAndCircle(Scene):
    def construct(self):
        circle = Circle()  # create a circle
        circle.set_fill(PINK, opacity=0.5)  # set the color and transparency

        square = Square()  # create a square
        square.set_fill(BLUE, opacity=0.5)  # set the color and transparency

        square.next_to(circle, RIGHT, buff=0.5)  # set the position
        self.play(Create(circle), Create(square))  # show the shapes on screen

class AnimatedSquareToCircle(Scene):
    def construct(self):
        circle = Circle()  # create a circle
        square = Square()  # create a square

        self.play(Create(square))  # show the square on screen
        self.play(square.animate.rotate(PI / 4))  # rotate the square
        self.play(Transform(square, circle))  # transform the square into a circle
        self.play(
            square.animate.set_fill(PINK, opacity=0.5)
        )  # color the circle on screen

class DifferentRotations(Scene):
    def construct(self):
        left_square = Square(color=BLUE, fill_opacity=0.7).shift(2 * LEFT)
        right_square = Square(color=GREEN, fill_opacity=0.7).shift(2 * RIGHT)
        self.play(
            left_square.animate.rotate(PI), Rotate(right_square, angle=PI), run_time=2
        )
        self.wait()


# `Transform` vs `ReplacementTransform`

class TwoTransforms(Scene):
    def transform(self):
        a = Circle()
        b = Square()
        c = Triangle()
        self.play(Transform(a, b))
        self.play(Transform(a, c))
        self.play(FadeOut(a))

    def replacement_transform(self):
        a = Circle()
        b = Square()
        c = Triangle()
        self.play(ReplacementTransform(a, b))
        self.play(ReplacementTransform(b, c))
        self.play(FadeOut(c))

    def construct(self):
        self.transform()
        self.wait(0.5)  # wait for 0.5 seconds
        self.replacement_transform()

class TransformCycle(Scene):
    def construct(self):
        a = Circle()
        t1 = Square()
        t2 = Triangle()
        self.add(a)
        self.wait()
        for t in [t1,t2]:
            self.play(Transform(a,t))