我试图弄清楚是否有任何方法可以更改现有 matplotlib FuncAnimation 的间隔。我希望能够根据用户输入调整动画的速度。
我发现了类似的问题如何更改帧之间的间隔(python)?,但既然没有得到答案,我想我还是会问它。
我需要和拥有的一个最小的例子是:
"""
Based on Matplotlib Animation Example
author: Jake Vanderplas
https://stackoverflow.com/questions/35658472/animating-a-moving-dot
"""
from matplotlib import pyplot as plt
from matplotlib import animation
import Tkinter as tk
import numpy as np
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg, NavigationToolbar2TkAgg
class AnimationWindow(tk.Frame):
def __init__(self, parent):
tk.Frame.__init__(self, parent)
self.fig = plt.figure(0, figsize=(10, 10))
self.anim = None
self.speed = 2
self.canvas = FigureCanvasTkAgg(self.fig, self)
self.canvas.show()
self.canvas.get_tk_widget().pack(side=tk.TOP, fill=tk.BOTH, expand=True)
self.canvas.mpl_connect('resize_event', self.on_resize)
self.bar = tk.Scale(self, from_=0.25, to=10, resolution=0.25, command=self.change_play_speed, orient=tk.HORIZONTAL)
self.bar.pack(fill=tk.X)
def start_animation(self):
ax = plt.axes()
self.x = np.arange(0, 2 * np.pi, 0.01)
self.line, = ax.plot(self.x, np.sin(self.x))
# The return needs to be assigned to a variable in order to prevent the cleaning by the GC
self.anim = animation.FuncAnimation(self.fig, self.animation_update, frames=100,
interval=100/self.speed, blit=True, repeat=False)
def animation_update(self, i):
self.line.set_ydata(np.sin(self.x + i / 10.0)) # update the data
return self.line,
return tuple(self.annotation)
def change_play_speed(self, speed):
self.speed = float(speed)
# This works but I think somehow the previous animation remains
#self.anim = animation.FuncAnimation(self.fig, self.animation_update, frames=100, interval=100/self.speed, blit=True, repeat=False)
def on_resize(self, event):
"""This function runs when the window is resized.
It's used to clear the previous points from the animation which remain after resizing the windows."""
plt.cla()
def main():
root = tk.Tk()
rw = AnimationWindow(root)
rw.pack()
rw.start_animation()
root.mainloop()
if __name__ == '__main__':
main()
在更改速度功能中,我有一个针对此问题的注释解决方案。这个解决方案存在两个主要问题:它很可能非常低效(我认为);而且我还没有找到删除先前导致闪烁的动画的方法。