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[Bug]: plt.autoscale() fails for partial Arc #23329
Description
Bug summary
Using plt.autoscale() for an Arc with theta1 & theta2 for a not full ellipse results in a wrong scaling.
For example:
Arc((0,0),1,1,theta1=0,theta2=90)
Code for reproduction
import matplotlib.pyplot as plt
from matplotlib.patches import Arc
fig, ax = plt.subplots()
ax.add_patch(Arc((0,0),1,1,theta1=0,theta2=90))
plt.autoscale()
plt.show()Actual outcome
Expected outcome
I think it would be better to have a zoomed in version of the partial arc. Like this:
Additional information
No response
Operating system
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Matplotlib Version
3.5.2
Matplotlib Backend
No response
Python version
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Jupyter version
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Installation
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Activity
oscargus commented on Jun 24, 2022
The reason is that the path that is stored is for a complete Ellipse and that the angles are not taken into account until draw time. As the bounding box is determined from the saved path this is what happens...
This can be seen be e.g.
A solution to this is probably to define a better get_path-method for Arc.
oscargus commented on Jun 24, 2022
This is vaguely related (solving this may solve that): #19550
Also this can be worth considering: #11266
StFroese commented on Jun 24, 2022
@oscargus Thanks a lot!