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<div class="section" id="api-example-code-compound-path-py">
<span id="api-compound-path"></span><h1>api example code: compound_path.py<a class="headerlink" href="#api-example-code-compound-path-py" title="Permalink to this headline">¶</a></h1>
<p>(<a class="reference external" href="../../mpl_examples/api/compound_path.py">Source code</a>, <a class="reference external" href="../../mpl_examples/api/compound_path.png">png</a>, <a class="reference external" href="../../mpl_examples/api/compound_path.hires.png">hires.png</a>, <a class="reference external" href="../../mpl_examples/api/compound_path.pdf">pdf</a>)</p>
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<img alt="../../_images/compound_path.png" src="../../_images/compound_path.png" />
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<div class="highlight-python"><div class="highlight"><pre><span class="sd">"""</span>
<span class="sd">Make a compund path -- in this case two simple polygons, a rectangle</span>
<span class="sd">and a triangle. Use CLOSEOPOLY and MOVETO for the different parts of</span>
<span class="sd">the compound path</span>
<span class="sd">"""</span>
<span class="kn">import</span> <span class="nn">numpy</span> <span class="kn">as</span> <span class="nn">np</span>
<span class="kn">from</span> <span class="nn">matplotlib.path</span> <span class="kn">import</span> <span class="n">Path</span>
<span class="kn">from</span> <span class="nn">matplotlib.patches</span> <span class="kn">import</span> <span class="n">PathPatch</span>
<span class="kn">import</span> <span class="nn">matplotlib.pyplot</span> <span class="kn">as</span> <span class="nn">plt</span>
<span class="n">vertices</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">codes</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">codes</span> <span class="o">=</span> <span class="p">[</span><span class="n">Path</span><span class="o">.</span><span class="n">MOVETO</span><span class="p">]</span> <span class="o">+</span> <span class="p">[</span><span class="n">Path</span><span class="o">.</span><span class="n">LINETO</span><span class="p">]</span><span class="o">*</span><span class="mi">3</span> <span class="o">+</span> <span class="p">[</span><span class="n">Path</span><span class="o">.</span><span class="n">CLOSEPOLY</span><span class="p">]</span>
<span class="n">vertices</span> <span class="o">=</span> <span class="p">[(</span><span class="mi">1</span><span class="p">,</span><span class="mi">1</span><span class="p">),</span> <span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="mi">2</span><span class="p">),</span> <span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="mi">2</span><span class="p">),</span> <span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="mi">1</span><span class="p">),</span> <span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="mi">0</span><span class="p">)]</span>
<span class="n">codes</span> <span class="o">+=</span> <span class="p">[</span><span class="n">Path</span><span class="o">.</span><span class="n">MOVETO</span><span class="p">]</span> <span class="o">+</span> <span class="p">[</span><span class="n">Path</span><span class="o">.</span><span class="n">LINETO</span><span class="p">]</span><span class="o">*</span><span class="mi">2</span> <span class="o">+</span> <span class="p">[</span><span class="n">Path</span><span class="o">.</span><span class="n">CLOSEPOLY</span><span class="p">]</span>
<span class="n">vertices</span> <span class="o">+=</span> <span class="p">[(</span><span class="mi">4</span><span class="p">,</span><span class="mi">4</span><span class="p">),</span> <span class="p">(</span><span class="mi">5</span><span class="p">,</span><span class="mi">5</span><span class="p">),</span> <span class="p">(</span><span class="mi">5</span><span class="p">,</span> <span class="mi">4</span><span class="p">),</span> <span class="p">(</span><span class="mi">0</span><span class="p">,</span><span class="mi">0</span><span class="p">)]</span>
<span class="n">vertices</span> <span class="o">=</span> <span class="n">np</span><span class="o">.</span><span class="n">array</span><span class="p">(</span><span class="n">vertices</span><span class="p">,</span> <span class="nb">float</span><span class="p">)</span>
<span class="n">path</span> <span class="o">=</span> <span class="n">Path</span><span class="p">(</span><span class="n">vertices</span><span class="p">,</span> <span class="n">codes</span><span class="p">)</span>
<span class="n">pathpatch</span> <span class="o">=</span> <span class="n">PathPatch</span><span class="p">(</span><span class="n">path</span><span class="p">,</span> <span class="n">facecolor</span><span class="o">=</span><span class="s">'None'</span><span class="p">,</span> <span class="n">edgecolor</span><span class="o">=</span><span class="s">'green'</span><span class="p">)</span>
<span class="n">fig</span><span class="p">,</span> <span class="n">ax</span> <span class="o">=</span> <span class="n">plt</span><span class="o">.</span><span class="n">subplots</span><span class="p">()</span>
<span class="n">ax</span><span class="o">.</span><span class="n">add_patch</span><span class="p">(</span><span class="n">pathpatch</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">set_title</span><span class="p">(</span><span class="s">'A compound path'</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">dataLim</span><span class="o">.</span><span class="n">update_from_data_xy</span><span class="p">(</span><span class="n">vertices</span><span class="p">)</span>
<span class="n">ax</span><span class="o">.</span><span class="n">autoscale_view</span><span class="p">()</span>
<span class="n">plt</span><span class="o">.</span><span class="n">show</span><span class="p">()</span>
</pre></div>
</div>
<p>Keywords: python, matplotlib, pylab, example, codex (see <a class="reference internal" href="../../faq/howto_faq.html#how-to-search-examples"><em>Search examples</em></a>)</p>
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