Bug report

Bug summary

3D patch does not return correct face color with get_facecolor if color has been changed via set_facecolor. The _facecolor3d attribute is only updated at object initialization in set_3d_properties.

Code for reproduction

from matplotlib import pyplot as plt
from matplotlib.patches import Circle
from mpl_toolkits.mplot3d import art3d

fig = plt.figure()
ax = plt.axes(projection="3d")
circle = Circle((0,0))
ax.add_patch(circle)
art3d.patch_2d_to_3d(circle)
circle.set_facecolor((1.0, 0.0, 0.0, 1))

fig.canvas.draw() #draw to update circle._facecolor2d to circle._facecolor3d
print(circle.get_facecolor())

Actual outcome

(0.12156862745098039, 0.4666666666666667, 0.7058823529411765, 1.0)

Expected outcome

(1.0, 0.0, 0.0, 1)

Matplotlib version

• Operating system: Linux
• Matplotlib version: 3.3.2
• Matplotlib backend: Tkagg
• Python version: 3.9.0
• Jupyter version (if applicable):
• Other libraries: