Is there a way that I can use rotating while fading?

[Stanford997]

Here is my code:

        text = Text("rotate while fading", height=1)
        self.add(text)
        self.play(
            Rotating(
                text,
                PI / 2,
                run_time=3,
                about_edge=(np.array([0, 1, 0])),
                axis=LEFT),
            FadeOut(text)
        )

But it doesn't work. It just fades out without rotating.

[uwezi]

Ok, let's first get your rotation to work at all, currently this part alone would cause a couple of error messages:

class rotfade(Scene):
    def construct(self):
        text = Text("rotate while fading", height=1)
        self.add(text)
        self.play(
            Rotating(
                text,
                angle=PI / 2,
                run_time=3,
                about_edge=np.array([0, 1, 0]),
                axis=LEFT,
                ),
        )  

rotfade.mp4

You cannot have two independent animations on the same object in a single self.play() because of the way the rendering engine in Manin works, but you can do it like this, using basic object modifier together with .animate:

class rotfade2(Scene):
    def construct(self):
        text = Text("rotate while fading", height=1)
        self.add(text)
        self.play(
            text.animate.rotate(angle=PI/2,about_point=text.get_top(), axis=LEFT).set_opacity(0)
        )  

rotfade2.mp4

Come over to Discord to learn more about Manim and get better help:
https://docs.manim.community/en/stable/faq/general.html

[Stanford997]

Thanks to your help I managed to achieve this:

class rotfade3(Scene):
    def construct(self):
        text1 = Text("rotate while fading", height=1)
        self.add(text1)

        text2 = Text("fade while rotating", height=1)
        self.add(text2)

        text2.rotate(angle=3 * PI / 2, about_point=[0, 0, -0.5], axis=LEFT).set_opacity(0)
        self.play(
            text1.animate.rotate(angle=PI / 2, about_point=[0, 0, -0.5], axis=LEFT).set_opacity(0),
            text2.animate.rotate(angle=PI / 2, about_point=[0, 0, -0.5], axis=LEFT).set_opacity(1)
        )

rotfade3.mp4

[uwezi]

nice!