如何使用 manim 从非场景 class 播放动画?

How can I play an animation from a non-Scene class using manim?

我想做一个神经网络动画,我在网上找到了一个 class,我根据自己的需要对其进行了修改。基本上,class 看起来像:

class NeuralNetworkMobject(VGroup):
    ...
    ...
    def change_edge_color(...):
        edge = random.choice(n1.edges_out) # n1.edges_out is a VGroup, and edge is Line 
        # I want to play the edge fade in animation from this method.
        # I've tried to do:
        NeuralNetworkScene.play(FadeIn(edge)) # NeuralNetworkScene is the actual scene

但是,程序报错,说:

  File "neural.py", line 171, in set_neuron_edge_color
    NeuralScene.play(FadeIn(n_edge))
  File "/usr/local/lib/python3.9/site-packages/manimlib/scene/scene.py", line 845, in wrapper
    self.update_skipping_status()
  AttributeError: 'FadeIn' object has no attribute 'update_skipping_status'

如何从非场景播放动画class?

谢谢,

所以我尽我所能,包括实例化主场景然后尝试播放动画(你显然不应该这样做)直接访问 Scene.play() 方法(这没有用任何一个)。因此,作为解决方案,我想出了:

class MainScene(Scene):
    def construct(self):
        ...
        neurons = NeuralNetworkMobject()
        your_animation_function(neurons)

    def your_animation_function(self, neurons):
        self.play(FadeIn(neurons))
        ...

虽然这种方法确实解决了问题,但出于好奇,我想问是否可以从非场景播放动画class?

谢谢,