How to achieve a line with different styles of starting/ending tip?

Hello, I’m new here

I’m trying to create a scene that has a line with a dot in ending/starting. It would look like this…

I’m following this doc, I tried to run the following code:

class Viterbi(Scene):
    def construct(self):
        arrow = Arrow(np.array([0, 0, 0]), np.array([1, 1, 0]), tip_shape=ArrowCircleTip)
        self.add(arrow)
        self.wait()

I received this warning:

NameError: name 'ArrowCircleTip' is not defined

I am not a specialist in reading documents, but based in this doc, manim.mobject.geometry.ArrowCircleFilledTip means that the class ArrowCircleFilledTip should be located in manim/mobject/geometry.py, doesn’t?

Anyway, this path doesn’t exist. But I found the path manim/manimlib/mobject/geometry.py, and there isn’t the statement of the ArrowCircleTip class. If I’m not wrong, I should find this class there. That’s the problem? how can I solve it?

I have an interesting case:

1. When I change ArrowCircleTip to RegularPolygon (which exists inmanim/manimlib/mobject/geometry.py), this code still gives me an arrow-styled line, that is

PS: Sorry if this question is stupid, I didn’t find it anywhere…

[NeoPlato]

I don’t really know if I can give fully accurate advice.

Best plan: go for the community version. It’s in the name, help and documentation will be closer to you than in the main version.

[NeoPlato]

You mean this?

class ArrowCircleTip(Line):
    def __init__(self, *args, **kwargs):
        Line.__init__(self, *args, **kwargs)
        self.add_dot_tip()

    def add_dot_tip(self, tip_length=None, at_start=True):
        """
        Returns a tip that has been stylistically configured,
        but has not yet been given a position in space.
        """
        if tip_length is None:
            tip_length = DEFAULT_DOT_RADIUS
        color = self.get_color()
        style = {
            "fill_color": color,
            "stroke_color": color
        }
        style.update(self.tip_style)
        tip = Dot(radius=tip_length, **style)
        tip.move_to(self.get_end())
        self.add(tip)
        if at_start:
            end_tip = tip.copy()
            end_tip.move_to(self.get_start())
            self.add(end_tip)