Python实现改变与矩形橡胶的线条的颜色代码示例

import numpy as np
import matplotlib.pyplot as plt
from matplotlib.transforms import Bbox
from matplotlib.path import Path

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


left,bottom,width,height = (-1,-1,2,2)
rect = plt.Rectangle((left,bottom),height,facecolor="#aaaaaa")

fig,ax = plt.subplots()
ax.add_patch(rect)

bbox = Bbox.from_bounds(left,height)

for i in range(12):
  vertices = (np.random.random((2,2)) - 0.5) * 6.0
  path = Path(vertices)
  if path.intersects_bbox(bbox):
    color = 'r'
  else:
    color = 'b'
  ax.plot(vertices[:,0],vertices[:,1],color=color)

plt.show()