3b1b-manim/manimlib/animation/rotation.py

from manimlib.animation.animation import Animation
from manimlib.constants import OUT
from manimlib.constants import PI
from manimlib.constants import TAU
from manimlib.utils.rate_functions import linear
from manimlib.utils.rate_functions import smooth


class Rotating(Animation):
    CONFIG = {
        # "axis": OUT,
        # "radians": TAU,
        "run_time": 5,
        "rate_func": linear,
        "about_point": None,
        "about_edge": None,
        "suspend_mobject_updating": False,
    }

    def __init__(self, mobject, angle=TAU, axis=OUT, **kwargs):
        self.angle = angle
        self.axis = axis
        super().__init__(mobject, **kwargs)

    def interpolate_mobject(self, alpha):
        for sm1, sm2 in self.get_all_families_zipped():
            sm1.points[:] = sm2.points
        self.mobject.rotate(
            alpha * self.angle,
            axis=self.axis,
            about_point=self.about_point,
            about_edge=self.about_edge,
        )


class Rotate(Rotating):
    CONFIG = {
        "run_time": 1,
        "rate_func": smooth,
    }

    def __init__(self, mobject, angle=PI, axis=OUT, **kwargs):
        super().__init__(mobject, angle, axis, **kwargs)