FadeOut on DiGraph does not work smoothly

[uwezi]

Description of bug / unexpected behavior

ManimCE v0.18.1

Using self.play(Fadeout()) on a DiGraph() object does not correctly fade out the edges, only the nodes and arrow tips. Removing the individual subobjects works.

Link to the Discord discussion

Expected behavior

All elements of a DiGraph() should fade smoothly out.

How to reproduce the issue

Code for reproducing the problem

class IntroductionToGraphs(Scene):
    def construct(self):
        vertexs = [num for num in range(1,7)]
        arestes = [(1,2), (3,1), (1,5), (1,6), (5,1), (5,6), (3,4)]
        layout = "circular"

        graf_arestes1 = Graph(vertexs, arestes, labels = True, layout = layout)
        graf_arestes2 = DiGraph(vertexs, arestes, labels = True, layout = layout)
        graf_arestes3 = graf_arestes2.copy()

        graf_arestes1.scale_to_fit_width(14/3).to_edge(LEFT, buff=0)
        graf_arestes2.scale_to_fit_width(14/3)
        graf_arestes3.scale_to_fit_width(14/3).to_edge(RIGHT, buff=0)

        self.play(
            Create(graf_arestes1),
            Create(graf_arestes2),
            Create(graf_arestes3),
        )
        self.wait()
        self.play(
            FadeOut(graf_arestes1),
            FadeOut(graf_arestes2),
            FadeOut(*[obj for obj in graf_arestes3])
        )

Additional media files

Images/GIFs

IntroductionToGraphs.mp4

System specifications

System Details

irrelevant - the problem occurs on both Windows 10 and Manimator

[Nikhil-42]

This is an issue with the edge updater in the DiGraph. I'll take a look at it.