art3d.pathpatch_2d_to_3d of paches.arc gives a full circle - python-3.x

Question

I tried to draw an NBA court using matplotlib. I found the code from here but it's a 2D drawing. I modified a few lines and using art3d.pathpatch_2d_to_3d to transform all patches to a 3d plot. Everything works well except for Arc which shows a full circle.
from matplotlib.patches import Circle, Rectangle, Arc
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import art3d
def draw_court(ax=None, color='black', lw=2, outer_lines=False, ax_3d=False):
# If an axes object isn't provided to plot onto, just get current one
if ax is None:
ax = plt.gca()
# Create the various parts of an NBA basketball court
# Create the basketball hoop
# Diameter of a hoop is 18" so it has a radius of 9", which is a value
# 7.5 in our coordinate system
hoop = Circle((0, 0), radius=7.5, linewidth=lw, color=color, fill=False)
# Create backboard
backboard = Rectangle((-30, -7.5), 60, -1, linewidth=lw, color=color)
# The paint
# Create the outer box 0f the paint, width=16ft, height=19ft
outer_box = Rectangle((-80, -47.5), 160, 190, linewidth=lw, color=color,
fill=False)
# Create the inner box of the paint, widt=12ft, height=19ft
inner_box = Rectangle((-60, -47.5), 120, 190, linewidth=lw, color=color,
fill=False)
# Create free throw top arc
top_free_throw = Arc((0, 142.5), 120, 120, theta1=0, theta2=180,
linewidth=lw, color=color, fill=False)
# Create free throw bottom arc
bottom_free_throw = Arc((0, 142.5), 120, 120, theta1=180, theta2=0,
linewidth=lw, color=color, linestyle='dashed')
# Restricted Zone, it is an arc with 4ft radius from center of the hoop
restricted = Arc((0, 0), 80, 80, theta1=0, theta2=180, linewidth=lw,
color=color)
# Three point line
# Create the side 3pt lines, they are 14ft long before they begin to arc
corner_three_a = Rectangle((-220, -47.5), 0, 140, linewidth=lw,
color=color)
corner_three_b = Rectangle((220, -47.5), 0, 140, linewidth=lw, color=color)
# 3pt arc - center of arc will be the hoop, arc is 23'9" away from hoop
# I just played around with the theta values until they lined up with the
# threes
three_arc = Arc((0, 0), 475, 475, theta1=22, theta2=158, linewidth=lw,
color=color)
# Center Court
center_outer_arc = Arc((0, 422.5), 120, 120, theta1=180, theta2=0,
linewidth=lw, color=color)
center_inner_arc = Arc((0, 422.5), 40, 40, theta1=180, theta2=0,
linewidth=lw, color=color)
# List of the court elements to be plotted onto the axes
court_elements = [hoop, backboard, outer_box, inner_box, top_free_throw,
bottom_free_throw, restricted, corner_three_a,
corner_three_b, three_arc, center_outer_arc,
center_inner_arc]
if outer_lines:
# Draw the half court line, baseline and side out bound lines
outer_lines = Rectangle((-250, -47.5), 500, 470, linewidth=lw,
color=color, fill=False)
court_elements.append(outer_lines)
# Add the court elements onto the axes
for element in court_elements:
ax.add_patch(element)
if ax_3d:
art3d.patch_2d_to_3d(element, z=0, zdir="z")
return ax
if __name__ == "__main__":
fig = plt.figure()
ax = fig.add_subplot(121, projection='3d')
ax.set(xlim3d=(-300, 500), xlabel='X')
ax.set(ylim3d=(-300, 500), ylabel='Y')
ax.set(zlim3d=(0, 300), zlabel='Z')
draw_court(lw=1, outer_lines=True, ax_3d=True)
ax2 = fig.add_subplot(122)
ax2.set_xlim(-300, 500)
ax2.set_ylim(-100, 500)
draw_court(outer_lines=True)
plt.show()
Result:
Version:
matplotlib 3.5.3
I found the same problem here which is a known bug. However, I can not find the solution.
Edited:
I found the solution from the discussion here.
I just edited patches.py and added
self._path = Path.arc(self.theta1, self.theta2)
to the Arc class init function. (in my case, line 1913).
Edited result:
However, following the discuss, they said the arc length is incorrect. In my case, the problem is that, there is additional line from one end to another end of the Arc.
Is there another solution for this problem?
Thank you.