SF.net SVN: matplotlib:[6062] trunk/matplotlib/examples

[<md...@us...>]

Revision: 6062
          http://matplotlib.svn.sourceforge.net/matplotlib/?rev=6062&view=rev
Author:   mdboom
Date:     2008-09-03 19:58:01 +0000 (Wed, 03 Sep 2008)

Log Message:
-----------
Add donut demo (to demonstrate compound paths)

Modified Paths:
--------------
    trunk/matplotlib/examples/tests/backend_driver.py

Added Paths:
-----------
    trunk/matplotlib/examples/api/donut_demo.py

Added: trunk/matplotlib/examples/api/donut_demo.py
===================================================================
--- trunk/matplotlib/examples/api/donut_demo.py	                        (rev 0)
+++ trunk/matplotlib/examples/api/donut_demo.py	2008-09-03 19:58:01 UTC (rev 6062)
@@ -0,0 +1,54 @@
+import numpy as np
+import matplotlib.path as mpath
+import matplotlib.patches as mpatches
+import matplotlib.pyplot as plt
+
+def wise(v):
+    if v == 1:
+        return "CCW"
+    else:
+        return "CW"
+
+def make_circle(r):
+    t = np.arange(0, np.pi * 2.0, 0.01)
+    t = t.reshape((len(t), 1))
+    x = r * np.cos(t)
+    y = r * np.sin(t)
+    return np.hstack((x, y))
+
+Path = mpath.Path
+
+fig = plt.figure()
+ax = fig.add_subplot(111)
+
+inside_vertices = make_circle(0.5)
+outside_vertices = make_circle(1.0)
+codes = np.ones(len(inside_vertices), dtype=mpath.Path.code_type) * mpath.Path.LINETO
+codes[0] = mpath.Path.MOVETO
+
+for i, (inside, outside) in enumerate(((1, 1), (1, -1), (-1, 1), (-1, -1))):
+    # Concatenate the inside and outside subpaths together, changing their
+    # order as needed
+    vertices = np.concatenate((outside_vertices[::outside],
+                               inside_vertices[::inside]))
+    # Shift the path
+    vertices[:, 0] += i * 2.5
+    # The codes will be all "LINETO" commands, except for "MOVETO"s at the
+    # beginning of each subpath
+    all_codes = np.concatenate((codes, codes))
+    # Create the Path object
+    path = mpath.Path(vertices, all_codes)
+    # Add plot it
+    patch = mpatches.PathPatch(path, facecolor='#885500', edgecolor='black')
+    ax.add_patch(patch)
+
+    ax.annotate("Outside %s,\nInside %s" % (wise(outside), wise(inside)),
+                (i * 2.5, -1.5), va="top", ha="center")
+
+ax.set_xlim(-2,10)
+ax.set_ylim(-3,2)
+ax.set_title('Mmm, donuts!')
+ax.set_aspect(1.0)
+plt.show()
+
+

Modified: trunk/matplotlib/examples/tests/backend_driver.py
===================================================================
--- trunk/matplotlib/examples/tests/backend_driver.py	2008-09-03 19:15:22 UTC (rev 6061)
+++ trunk/matplotlib/examples/tests/backend_driver.py	2008-09-03 19:58:01 UTC (rev 6062)
@@ -126,6 +126,8 @@
 api_files = [
     'colorbar_only.py',
     'color_cycle.py',
+    'donut_demo.py',
+    'path_patch_demo.py'
 ]
 
 units_dir = os.path.join('..', 'units')


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