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我正在尝试在东北框架中绘制几艘不同船只的运动动画。每艘船都由圆形标记、颜色和 ID 标识。血管信息存储在对象列表中，Vessel每个对象具有positions存储north和east坐标的属性。

我只想保留最新船的位置，所以应该清除所有早期的点。

到目前为止，我所写的内容绘制了点，但我找不到指定其他参数（例如名称和颜色参数）的方法。我宁愿不必line为每个容器创建单独的对象，因为 ID 不一定是排序的，并且将来可能需要存储在单独列表中的静态对象。

我到目前为止的代码是

def plot_animation(vessels, objects, ts=10, n_min=3, **kwargs):
    import matplotlib.animation as animation

    """Plots the results of a simulation
    input:
        vessels: List of `Vessel()` type
        n_min: The number of minutes between each position scatter point
        **kwargs: Keyword arguments for the plotting commands

    output:
        None
    """
    pos_marker = kwargs.get("pos_marker", "o") # options
    pos_marker_size = kwargs.get("pos_marker_size", 50)

    frames = len(vessels[0].get_positions()) # number of simulation time-points
    axis_min = 0
    axis_max = 0
    for v in vessels: # for determining axis bounds
        positions = v.get_positions()
        axis_min = min(min([min(pos) for pos in positions]), axis_min)
        axis_max = max(max([max(pos) for pos in positions]), axis_max)

    fig = plt.figure()
    ax = fig.add_subplot(
        111, autoscale_on=False, xlim=(axis_min, axis_max), ylim=(axis_min, axis_max)
    )
    ax.set_aspect("equal")
    ax.grid()
    ax.set_xlabel("East [km]")
    ax.set_ylabel("North [km]")

    (line,) = ax.plot([], [], "o")

    def init():
        line.set_data([], [])
        return (line,)

    def animate(i):
        x = []
        y = []

        for v in vessels:
            positions = v.get_positions()
            north = positions[i].north
            east = positions[i].east
            x.append(east)
            y.append(north)
        line.set_data(x, y)
        return (line,)

    ani = animation.FuncAnimation(
        fig, animate, frames=frames, init_func=init, blit=True
    )
    plt.show()
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