compound_path.py

"""
=============
Compound path
=============

Make a compound path -- in this case two simple polygons, a rectangle
and a triangle.  Use ``CLOSEPOLY`` and ``MOVETO`` for the different parts of
the compound path
"""

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)]

path = Path(vertices, codes)

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

fig, ax = plt.subplots()
ax.add_patch(pathpatch)
ax.set_title('A compound path')

ax.autoscale_view()

plt.show()

#############################################################################
#
# .. admonition:: References
#
#    The use of the following functions, methods, classes and modules is shown
#    in this example:
#
#    - `matplotlib.path`
#    - `matplotlib.path.Path`
#    - `matplotlib.patches`
#    - `matplotlib.patches.PathPatch`
#    - `matplotlib.axes.Axes.add_patch`
#    - `matplotlib.axes.Axes.autoscale_view`