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DOC: Use FuncAnimation in 3D animations #31471

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timhoffm merged 1 commit into from
Apr 8, 2026
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DOC: Use FuncAnimation in 3D animations #31471

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14 changes: 9 additions & 5 deletions galleries/examples/mplot3d/rotate_axes3d_sgskip.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,14 +5,15 @@

A very simple animation of a rotating 3D plot about all three axes.

See :doc:`wire3d_animation_sgskip` for another example of animating a 3D plot.
See :doc:`wire3d_animation` for another example of animating a 3D plot.

(This example is skipped when building the documentation gallery because it
intentionally takes a long time to run)
"""

import matplotlib.pyplot as plt

from matplotlib import animation
from mpl_toolkits.mplot3d import axes3d

fig = plt.figure()
Expand All @@ -27,8 +28,9 @@
ax.set_ylabel('y')
ax.set_zlabel('z')


# Rotate the axes and update
for angle in range(0, 360*4 + 1):
def animate(angle):
# Normalize the angle to the range [-180, 180] for display
angle_norm = (angle + 180) % 360 - 180

Expand All @@ -45,10 +47,12 @@

# Update the axis view and title
ax.view_init(elev, azim, roll)
plt.title('Elevation: %d°, Azimuth: %d°, Roll: %d°' % (elev, azim, roll))
ax.set_title(f'Elevation: {elev}°, Azimuth: {azim}°, Roll: {roll}°')


ani = animation.FuncAnimation(fig, animate, interval=25, frames=360*4)

plt.draw()
plt.pause(.001)
plt.show()

# %%
# .. tags::
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29 changes: 21 additions & 8 deletions ...amples/mplot3d/wire3d_animation_sgskip.py → ...ries/examples/mplot3d/wire3d_animation.py
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Original file line number Diff line number Diff line change
Expand Up @@ -4,16 +4,18 @@
===========================

A very simple "animation" of a 3D plot. See also :doc:`rotate_axes3d_sgskip`.

(This example is skipped when building the documentation gallery because it
intentionally takes a long time to run.)
"""

import time

import matplotlib.pyplot as plt
import numpy as np

from matplotlib import animation

FRAMES = 25
FPS = 25

fig = plt.figure()
ax = fig.add_subplot(projection='3d')

Expand All @@ -28,17 +30,28 @@
# Begin plotting.
wframe = None
tstart = time.time()
for phi in np.linspace(0, 180. / np.pi, 100):
# If a line collection is already remove it before drawing.


def animate(i):
global wframe
# If a line collection is already there, remove it before drawing.
if wframe:
wframe.remove()
# Generate data.
phi = i / FRAMES * 2 * np.pi
Z = np.cos(2 * np.pi * X + phi) * (1 - np.hypot(X, Y))
# Plot the new wireframe and pause briefly before continuing.
# Plot the new wireframe.
wframe = ax.plot_wireframe(X, Y, Z, rstride=2, cstride=2)
plt.pause(.001)
if i == FRAMES - 1: # Print FPS at the end of the loop.
global tstart
fps = FRAMES / (time.time() - tstart)
print(f'Expected FPS: {FPS}; Average FPS: {fps}')
tstart = time.time()


ani = animation.FuncAnimation(fig, animate, interval=1000 / FPS, frames=FRAMES)

print('Average FPS: %f' % (100 / (time.time() - tstart)))
plt.show()

# %%
# .. tags::
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