Manim 渐变

%%manim -qm CircleToSquare

class CircleToSquare(Scene):
    def construct(self):
 
        p1 = RegularPolygram(9, density=1, color=BLUE)
        txt1 = Text("density=1", font_size=20, color=BLUE)
        vg1 = VGroup(p1, txt1).arrange(DOWN, buff=0.2)

        p2 = RegularPolygram(9, density=2, color=GREEN)
        txt2 = Text("density=2", font_size=20, color=GREEN)
        vg2 = VGroup(p2, txt2).arrange(DOWN, buff=0.2)

        p3 = RegularPolygram(9, density=3, color=RED)
        p3.set_color(color_gradient([BLUE, RED], 10))
        txt3 = Text("density=3", font_size=20, color=YELLOW)
        vg3 = VGroup(p3, txt3).arrange(DOWN, buff=1.2)

        vg = VGroup(vg1, vg2, vg3).arrange(RIGHT)
        self.play(Create(vg))
        left_square = Square(color=YELLOW).shift(2*LEFT)
        left_square.set_color(color_gradient([BLUE, RED], 10))
        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()