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DOC: add example of spinning circle icon animation #24448

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DOC: add example of spinning circle icon animation #24448

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DOC: add spinning circle icon animation example
joAschauer Nov 14, 2022
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return sequence af artists in update function
joAschauer Nov 14, 2022
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joAschauer Nov 14, 2022
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49 changes: 49 additions & 0 deletions examples/animation/spinning_circle.py
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"""
=========================
Spinning circle animation
=========================

This example shows how to create an animated spinning circle loading icon.
"""

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation

fig, ax = plt.subplots(subplot_kw={'projection': 'polar'})

ax.axis('off')

lines = ax.vlines(
np.radians(np.arange(0, 360, 30)),
0.5,
1,
lw=17,
colors=np.linspace(0.15, 0.85, 12, dtype=str),
capstyle='round',
)

ax.set_rmax(1.1) # make round capstyle on outside visible

def update(*args):
new_colors = np.roll(lines.get_colors(), shift=-1, axis=0)
lines.set_color(new_colors)
return lines,


ani = animation.FuncAnimation(
fig,
update,
interval=100)

plt.show()

#############################################################################
#
# .. admonition:: References
#
# The use of the following functions, methods, classes and modules is shown
# in this example:
#
# - `matplotlib.axes.Axes.vlines` / `matplotlib.pyplot.vlines`
# - `matplotlib.animation.FuncAnimation`