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I'm working on a script that animates the process of drawing a shape and saves the animation to a GIF. However, when I call plt.show() after saving the animation, the popup window only displays the last frame of the animation. Here's the current code (hex_draw is just the module providing the drawing functions I use):

import matplotlib.pyplot as plt
from matplotlib.animation import FuncAnimation,PillowWriter
import hex_draw as hdraw
import json

def animate(frame,x_vals,y_vals,scale):
    plt.plot(x_vals[frame],y_vals[frame],'go',ms=1.5*scale)

def main():
    ax = plt.figure(figsize=(4,4)).add_axes([0,0,1,1])
    plt.gca().axis("off")
    ax.set_aspect("equal")
    plot_data = hdraw.convert_to_points("qaq","east",settings)
    hdraw.plot_monochrome(plot_data,settings)

    ani = FuncAnimation(plt.gcf(),
                        func=animate,
                        fargs=[*plot_data[:3]],
                        frames=len(plot_data[0]),
                        interval=800,
                        repeat=False)

    ani.save("test_anim.gif",dpi=100,writer=PillowWriter(fps=1))
    plt.show()


with open("settings.json",mode="r") as file:
    settings = json.load(file)
main()

Removing the line that saves the animation to a GIF causes the popup to animate properly, so that's definitely the cause of the problem. I've tried setting repeat to True in the FuncAnimation call, and that doesn't fix anything.

Enderhippo
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  • Maybe try inserting the line `ani.frame_seq = ani.new_frame_seq()` between the `ani.save` call and the `plt.show` line? [How to reset matplotlib animation without re-running script?](https://stackoverflow.com/questions/38601413/how-to-reset-matplotlib-animation-without-re-running-script) – Nathan Mills Nov 05 '22 at 21:09

0 Answers0