added compound path demo

jdh2358 · jdh2358 · commit 45566be99dc7 · 2009-04-01T20:44:27.000Z
svn path=/trunk/matplotlib/; revision=7021
diff --git a/examples/api/complex_path.py b/examples/api/complex_path.py
@@ -0,0 +1,35 @@
+"""
+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='red', 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()
