compound_path.py

"""
Make a compund path -- in this case two simple polygons, a rectangle
and a triangle.  Use CLOSEOPOLY and MOVETO for the different parts of
the compound path
"""
import numpy as np
from matplotlib.path import Path
from matplotlib.patches import PathPatch
import matplotlib.pyplot as plt


vertices = []
codes = []

codes = [Path.MOVETO] + [Path.LINETO]*3 + [Path.CLOSEPOLY]
vertices = [(1,1), (1,2), (2, 2), (2, 1), (0,0)]

codes += [Path.MOVETO] + [Path.LINETO]*2 + [Path.CLOSEPOLY]
vertices += [(4,4), (5,5), (5, 4), (0,0)]

vertices = np.array(vertices, float)
path = Path(vertices, codes)

pathpatch = PathPatch(path, facecolor='None', edgecolor='green')

fig = plt.figure()
ax = fig.add_subplot(111)
ax.add_patch(pathpatch)
ax.set_title('A compound path')

ax.dataLim.update_from_data_xy(vertices)
ax.autoscale_view()


plt.show()