问提取由matplotlib补丁包围的坐标。

EN

import matplotlib.pyplot as plt
import matplotlib.patches
import numpy as np

# create an ellipse
el = matplotlib.patches.Ellipse((50,-23), 10, 13.7, 30, facecolor=(1,0,0,.2), edgecolor='none')

# find the bounding box of the ellipse
bb = el.get_window_extent()

# calculate the x and y points possibly within the ellipse
x_int = np.arange(np.ceil(bb.x0), np.floor(bb.x1) + 1, dtype='int')
y_int = np.arange(np.ceil(bb.y0), np.floor(bb.y1) + 1, dtype='int')

# create a list of possible coordinates
g = np.meshgrid(x_int, y_int)
coords = np.array(zip(*(c.flat for c in g)))

# create a list of transformed points (transformed so that the ellipse is a unit circle)
transcoords = el.get_transform().inverted().transform(coords)

# find the transformed coordinates which are within a unit circle
validcoords = transcoords[:,0]**2 + transcoords[:,1]**2 < 1.0

# create the list of valid coordinates (from untransformed)
ellipsepoints = coords[validcoords]

# just to see if this works
fig = plt.figure()
ax = fig.add_subplot(111)
ax.add_artist(el)
ep = np.array(ellipsepoints)
ax.plot(ellipsepoints[:,0], ellipsepoints[:,1], 'ko')