3b1b-manim/manimlib/continual_animation/from_animation.py

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from manimlib.continual_animation.continual_animation import ContinualAnimation
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class CycleAnimation(ContinualAnimation):
def __init__(self, animation, **kwargs):
self.animation = animation
ContinualAnimation.__init__(self, animation.mobject, **kwargs)
def update_mobject(self, dt):
mod_value = self.internal_time % self.animation.run_time
alpha = mod_value / float(self.animation.run_time)
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self.animation.update(alpha)