# # 圆，楔和多边形

import numpy as np
from matplotlib.patches import Circle, Wedge, Polygon
from matplotlib.collections import PatchCollection
import matplotlib.pyplot as plt

# Fixing random state for reproducibility
np.random.seed(19680801)

fig, ax = plt.subplots()

resolution = 50  # the number of vertices
N = 3
x = np.random.rand(N)
y = np.random.rand(N)
patches = []
for x1, y1, r in zip(x, y, radii):
circle = Circle((x1, y1), r)
patches.append(circle)

x = np.random.rand(N)
y = np.random.rand(N)
theta1 = 360.0*np.random.rand(N)
theta2 = 360.0*np.random.rand(N)
for x1, y1, r, t1, t2 in zip(x, y, radii, theta1, theta2):
wedge = Wedge((x1, y1), r, t1, t2)
patches.append(wedge)

# Some limiting conditions on Wedge
patches += [
Wedge((.3, .7), .1, 0, 360),             # Full circle
Wedge((.7, .8), .2, 0, 360, width=0.05),  # Full ring
Wedge((.8, .3), .2, 0, 45),              # Full sector
Wedge((.8, .3), .2, 45, 90, width=0.10),  # Ring sector
]

for i in range(N):
polygon = Polygon(np.random.rand(N, 2), True)
patches.append(polygon)

colors = 100*np.random.rand(len(patches))
p = PatchCollection(patches, alpha=0.4)
p.set_array(np.array(colors))
fig.colorbar(p, ax=ax)

plt.show()


## # 参考

import matplotlib
matplotlib.patches
matplotlib.patches.Circle
matplotlib.patches.Wedge
matplotlib.patches.Polygon
matplotlib.collections.PatchCollection
matplotlib.collections.Collection.set_array