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twentyone-world.github.io/source/simplify/__init__.html
2022-04-26 00:05:09 +02:00

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<div class='docs'><h1>__init__.py</h1></div>
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<div class="highlight"><pre><span class="n">__all__</span> <span class="o">=</span> <span class="p">[</span><span class="s">&#39;create_point_store&#39;</span><span class="p">,</span> <span class="s">&#39;unify_polygon&#39;</span><span class="p">,</span> <span class="s">&#39;unify_polygons&#39;</span><span class="p">,</span> <span class="s">&#39;simplify_lines&#39;</span><span class="p">]</span>
<span class="kn">from</span> <span class="nn">unify</span> <span class="kn">import</span> <span class="o">*</span>
<span class="kn">from</span> <span class="nn">distance</span> <span class="kn">import</span> <span class="n">simplify_distance</span>
<span class="kn">from</span> <span class="nn">douglas_peucker</span> <span class="kn">import</span> <span class="n">simplify_douglas_peucker</span>
<span class="kn">from</span> <span class="nn">visvalingam</span> <span class="kn">import</span> <span class="n">simplify_visvalingam_whyatt</span>
<span class="n">simplification_methods</span> <span class="o">=</span> <span class="nb">dict</span><span class="p">()</span>
<span class="n">simplification_methods</span><span class="p">[</span><span class="s">&#39;distance&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">simplify_distance</span>
<span class="n">simplification_methods</span><span class="p">[</span><span class="s">&#39;douglas-peucker&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">simplify_douglas_peucker</span>
<span class="n">simplification_methods</span><span class="p">[</span><span class="s">&#39;visvalingam-whyatt&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">simplify_visvalingam_whyatt</span></pre></div>
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<p>simplifies a set of lines</p>
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<div class="highlight"><pre><span class="k">def</span> <span class="nf">simplify_lines</span><span class="p">(</span><span class="n">lines</span><span class="p">,</span> <span class="n">method</span><span class="p">,</span> <span class="n">params</span><span class="p">):</span></pre></div>
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<div class="highlight"><pre> <span class="n">simplify</span> <span class="o">=</span> <span class="n">simplification_methods</span><span class="p">[</span><span class="n">method</span><span class="p">]</span>
<span class="n">out</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">line</span> <span class="ow">in</span> <span class="n">lines</span><span class="p">:</span></pre></div>
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<p>remove duplicate points from line</p>
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<div class="highlight"><pre> <span class="n">unique</span> <span class="o">=</span> <span class="p">[</span><span class="n">line</span><span class="p">[</span><span class="mi">0</span><span class="p">]]</span>
<span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">line</span><span class="p">)):</span>
<span class="k">if</span> <span class="n">line</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="o">!=</span> <span class="n">line</span><span class="p">[</span><span class="n">i</span> <span class="o">-</span> <span class="mi">1</span><span class="p">]:</span>
<span class="n">unique</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">line</span><span class="p">[</span><span class="n">i</span><span class="p">])</span>
<span class="n">simplify</span><span class="p">(</span><span class="n">unique</span><span class="p">,</span> <span class="n">params</span><span class="p">)</span>
<span class="n">out</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">unique</span><span class="p">)</span>
<span class="k">return</span> <span class="n">out</span>
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