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520 lines
30 KiB
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<title>line.py</title>
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<div class='docs'><h1>line.py</h1></div>
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<div class='code'>
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<div class="highlight"><pre><span class="kn">from</span> <span class="nn">bbox</span> <span class="kn">import</span> <span class="n">BBox</span>
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<span class="kn">from</span> <span class="nn">geometry</span> <span class="kn">import</span> <span class="n">Geometry</span></pre></div>
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<p>polyline</p>
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<div class="highlight"><pre><span class="k">class</span> <span class="nc">PolyLine</span><span class="p">(</span><span class="n">Geometry</span><span class="p">):</span></pre></div>
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<a class='octothorpe' href='#section-2'>#</a>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">contours</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">contours</span> <span class="o">=</span> <span class="n">contours</span></pre></div>
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<p>returns the bounding box of the line</p>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">bbox</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span></pre></div>
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<div class='code'>
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<div class="highlight"><pre> <span class="n">bbox</span> <span class="o">=</span> <span class="n">BBox</span><span class="p">()</span>
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<span class="k">for</span> <span class="n">pts</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">contours</span><span class="p">:</span>
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<span class="k">for</span> <span class="n">pt</span> <span class="ow">in</span> <span class="n">pts</span><span class="p">:</span>
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<span class="n">bbox</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">pt</span><span class="p">)</span>
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<span class="k">return</span> <span class="n">bbox</span></pre></div>
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<p>projects the line to a map projection</p>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">project</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">proj</span><span class="p">):</span></pre></div>
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<div class="highlight"><pre> <span class="n">contours</span> <span class="o">=</span> <span class="p">[]</span>
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<span class="k">for</span> <span class="n">points</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">contours</span><span class="p">:</span>
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<span class="n">pts</span> <span class="o">=</span> <span class="p">[]</span>
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<span class="k">for</span> <span class="n">pt</span> <span class="ow">in</span> <span class="n">points</span><span class="p">:</span>
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<span class="k">if</span> <span class="n">proj</span><span class="o">.</span><span class="n">_visible</span><span class="p">(</span><span class="n">pt</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">pt</span><span class="p">[</span><span class="mi">1</span><span class="p">]):</span>
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<span class="n">p</span> <span class="o">=</span> <span class="n">proj</span><span class="o">.</span><span class="n">project</span><span class="p">(</span><span class="n">pt</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">pt</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
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<span class="k">if</span> <span class="n">p</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span><span class="p">:</span>
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<span class="n">pts</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">p</span><span class="p">)</span>
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<span class="k">else</span><span class="p">:</span>
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<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">pts</span><span class="p">)</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span>
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<span class="n">contours</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">pts</span><span class="p">)</span>
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<span class="n">pts</span> <span class="o">=</span> <span class="p">[]</span>
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<span class="k">if</span> <span class="nb">len</span><span class="p">(</span><span class="n">pts</span><span class="p">)</span> <span class="o">></span> <span class="mi">0</span><span class="p">:</span>
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<span class="n">contours</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">pts</span><span class="p">)</span>
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<span class="k">return</span> <span class="n">PolyLine</span><span class="p">(</span><span class="n">contours</span><span class="p">)</span></pre></div>
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<p>transforms the line to a new view</p>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">project_view</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">view</span><span class="p">):</span></pre></div>
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<div class="highlight"><pre> <span class="n">contours</span> <span class="o">=</span> <span class="p">[]</span>
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<span class="k">for</span> <span class="n">points</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">contours</span><span class="p">:</span>
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<span class="n">pts</span> <span class="o">=</span> <span class="p">[]</span>
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<span class="k">for</span> <span class="n">pt</span> <span class="ow">in</span> <span class="n">points</span><span class="p">:</span>
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<span class="n">p</span> <span class="o">=</span> <span class="n">view</span><span class="o">.</span><span class="n">project</span><span class="p">(</span><span class="n">pt</span><span class="p">)</span>
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<span class="n">pts</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">p</span><span class="p">)</span>
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<span class="n">contours</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">pts</span><span class="p">)</span>
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<span class="k">return</span> <span class="n">PolyLine</span><span class="p">(</span><span class="n">contours</span><span class="p">)</span></pre></div>
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<p>constructs a svg representation of this line</p>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">to_svg</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">svg</span><span class="p">,</span> <span class="nb">round</span><span class="p">):</span></pre></div>
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<div class="highlight"><pre> <span class="n">path_str</span> <span class="o">=</span> <span class="s">""</span>
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<span class="k">if</span> <span class="nb">round</span> <span class="ow">is</span> <span class="bp">False</span><span class="p">:</span>
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<span class="n">fmt</span> <span class="o">=</span> <span class="s">'</span><span class="si">%f</span><span class="s">,</span><span class="si">%f</span><span class="s">'</span>
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<span class="k">else</span><span class="p">:</span>
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<span class="n">fmt</span> <span class="o">=</span> <span class="s">'%.'</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="nb">round</span><span class="p">)</span> <span class="o">+</span> <span class="s">'f'</span>
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<span class="n">fmt</span> <span class="o">=</span> <span class="n">fmt</span> <span class="o">+</span> <span class="s">','</span> <span class="o">+</span> <span class="n">fmt</span>
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<span class="k">for</span> <span class="n">points</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">contours</span><span class="p">:</span>
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<span class="n">path_str</span> <span class="o">+=</span> <span class="s">"M "</span>
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<span class="n">pts</span> <span class="o">=</span> <span class="p">[]</span>
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<span class="k">for</span> <span class="n">pt</span> <span class="ow">in</span> <span class="n">points</span><span class="p">:</span>
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<span class="n">pts</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">fmt</span> <span class="o">%</span> <span class="p">(</span><span class="n">pt</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">pt</span><span class="p">[</span><span class="mi">1</span><span class="p">]))</span>
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<span class="n">path_str</span> <span class="o">+=</span> <span class="s">'L '</span><span class="o">.</span><span class="n">join</span><span class="p">(</span><span class="n">pts</span><span class="p">)</span>
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<span class="n">path</span> <span class="o">=</span> <span class="n">svg</span><span class="o">.</span><span class="n">node</span><span class="p">(</span><span class="s">'path'</span><span class="p">,</span> <span class="n">d</span><span class="o">=</span><span class="n">path_str</span><span class="p">)</span>
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<span class="k">return</span> <span class="n">path</span></pre></div>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">crop_to</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">geom</span><span class="p">):</span></pre></div>
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<p>skip</p>
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<div class="highlight"><pre> <span class="k">return</span> <span class="bp">self</span></pre></div>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">is_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="k">return</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">contours</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span></pre></div>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">unify</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">point_store</span><span class="p">,</span> <span class="n">precision</span><span class="p">):</span>
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<span class="kn">from</span> <span class="nn">kartograph.simplify</span> <span class="kn">import</span> <span class="n">unify_polygon</span>
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<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="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">contours</span><span class="p">)):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">contours</span><span class="p">[</span><span class="n">i</span><span class="p">]</span> <span class="o">=</span> <span class="n">unify_polygon</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">contours</span><span class="p">[</span><span class="n">i</span><span class="p">],</span> <span class="n">point_store</span><span class="p">,</span> <span class="n">precision</span><span class="p">)</span></pre></div>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">points</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
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<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">contours</span></pre></div>
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<p>is called after the points of this geometry have been
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changed from outside this class</p>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span></pre></div>
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<div class="highlight"><pre> <span class="k">pass</span></pre></div>
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<p>simple line (= list of points)</p>
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<div class='code'>
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<div class="highlight"><pre><span class="k">class</span> <span class="nc">Line</span><span class="p">(</span><span class="n">Geometry</span><span class="p">):</span></pre></div>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">points</span><span class="p">):</span>
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<span class="bp">self</span><span class="o">.</span><span class="n">pts</span> <span class="o">=</span> <span class="n">points</span></pre></div>
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<div class='section' id='section-20'>
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<p>returns the bounding box of the line</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">bbox</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span></pre></div>
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<div class='section' id='section-21'>
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<a class='octothorpe' href='#section-21'>#</a>
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<div class='code'>
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<div class="highlight"><pre> <span class="n">bbox</span> <span class="o">=</span> <span class="n">BBox</span><span class="p">()</span>
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<span class="k">for</span> <span class="n">pt</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">pts</span><span class="p">:</span>
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<span class="n">bbox</span><span class="o">.</span><span class="n">update</span><span class="p">(</span><span class="n">pt</span><span class="p">)</span>
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<span class="k">return</span> <span class="n">bbox</span></pre></div>
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<div class='section' id='section-22'>
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<p>projects the line to a map projection</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">project</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">proj</span><span class="p">):</span></pre></div>
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<div class='section' id='section-23'>
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<div class='code'>
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<div class="highlight"><pre> <span class="n">pts</span> <span class="o">=</span> <span class="p">[]</span>
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<span class="k">for</span> <span class="n">pt</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">pts</span><span class="p">:</span>
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<span class="n">p</span> <span class="o">=</span> <span class="n">proj</span><span class="o">.</span><span class="n">project</span><span class="p">(</span><span class="n">pt</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">pt</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
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<span class="k">if</span> <span class="n">p</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">None</span><span class="p">:</span>
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<span class="n">pts</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">p</span><span class="p">)</span>
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<span class="k">return</span> <span class="n">Line</span><span class="p">(</span><span class="n">pts</span><span class="p">)</span></pre></div>
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</div>
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<div class='section' id='section-24'>
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<a class='octothorpe' href='#section-24'>#</a>
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<p>transforms the line to a new view</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">project_view</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">view</span><span class="p">):</span></pre></div>
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</div>
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</div>
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<div class='clearall'></div>
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<div class='section' id='section-25'>
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<a class='octothorpe' href='#section-25'>#</a>
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</div>
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<div class='code'>
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<div class="highlight"><pre> <span class="n">pts</span> <span class="o">=</span> <span class="p">[]</span>
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<span class="k">for</span> <span class="n">pt</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">pts</span><span class="p">:</span>
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<span class="n">p</span> <span class="o">=</span> <span class="n">view</span><span class="o">.</span><span class="n">project</span><span class="p">(</span><span class="n">pt</span><span class="p">)</span>
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<span class="n">pts</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">p</span><span class="p">)</span>
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<span class="k">return</span> <span class="n">Line</span><span class="p">(</span><span class="n">pts</span><span class="p">)</span></pre></div>
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<div class='section' id='section-26'>
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<p>constructs a svg representation of this line</p>
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</div>
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<div class='code'>
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<div class="highlight"><pre> <span class="k">def</span> <span class="nf">to_svg</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">svg</span><span class="p">,</span> <span class="nb">round</span><span class="p">):</span></pre></div>
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</div>
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<div class='clearall'></div>
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<div class='section' id='section-27'>
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<div class='docs'>
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<a class='octothorpe' href='#section-27'>#</a>
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</div>
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<div class='code'>
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<div class="highlight"><pre> <span class="n">path_str</span> <span class="o">=</span> <span class="s">""</span>
|
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<span class="k">if</span> <span class="nb">round</span> <span class="ow">is</span> <span class="bp">False</span><span class="p">:</span>
|
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<span class="n">fmt</span> <span class="o">=</span> <span class="s">'</span><span class="si">%f</span><span class="s">,</span><span class="si">%f</span><span class="s">'</span>
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<span class="k">else</span><span class="p">:</span>
|
|
<span class="n">fmt</span> <span class="o">=</span> <span class="s">'%.'</span> <span class="o">+</span> <span class="nb">str</span><span class="p">(</span><span class="nb">round</span><span class="p">)</span> <span class="o">+</span> <span class="s">'f'</span>
|
|
<span class="n">fmt</span> <span class="o">=</span> <span class="n">fmt</span> <span class="o">+</span> <span class="s">','</span> <span class="o">+</span> <span class="n">fmt</span>
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|
|
<span class="k">for</span> <span class="n">pt</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">pts</span><span class="p">:</span>
|
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<span class="k">if</span> <span class="n">path_str</span> <span class="o">==</span> <span class="s">""</span><span class="p">:</span>
|
|
<span class="n">path_str</span> <span class="o">=</span> <span class="s">"M"</span>
|
|
<span class="k">else</span><span class="p">:</span>
|
|
<span class="n">path_str</span> <span class="o">+=</span> <span class="s">"L"</span>
|
|
<span class="n">path_str</span> <span class="o">+=</span> <span class="n">fmt</span> <span class="o">%</span> <span class="p">(</span><span class="n">pt</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">pt</span><span class="p">[</span><span class="mi">1</span><span class="p">])</span>
|
|
|
|
<span class="n">path</span> <span class="o">=</span> <span class="n">svg</span><span class="o">.</span><span class="n">node</span><span class="p">(</span><span class="s">'path'</span><span class="p">,</span> <span class="n">d</span><span class="o">=</span><span class="n">path_str</span><span class="p">)</span>
|
|
<span class="k">return</span> <span class="n">path</span></pre></div>
|
|
</div>
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</div>
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<div class='clearall'></div>
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<div class='section' id='section-28'>
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<div class='docs'>
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<a class='octothorpe' href='#section-28'>#</a>
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</div>
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</div>
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|
<div class='code'>
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|
<div class="highlight"><pre> <span class="k">def</span> <span class="nf">crop_to</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">geom</span><span class="p">):</span></pre></div>
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</div>
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</div>
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<div class='clearall'></div>
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<div class='section' id='section-29'>
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<div class='docs'>
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<p>skip</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre> <span class="k">return</span> <span class="bp">self</span></pre></div>
|
|
</div>
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</div>
|
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<div class='clearall'></div>
|
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<div class='section' id='section-30'>
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<div class='docs'>
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<div class='octowrap'>
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<a class='octothorpe' href='#section-30'>#</a>
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</div>
|
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<div class='code'>
|
|
<div class="highlight"><pre> <span class="k">def</span> <span class="nf">is_empty</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
|
|
<span class="k">return</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">pts</span><span class="p">)</span> <span class="o">==</span> <span class="mi">0</span></pre></div>
|
|
</div>
|
|
</div>
|
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<div class='clearall'></div>
|
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<div class='section' id='section-31'>
|
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<div class='docs'>
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<a class='octothorpe' href='#section-31'>#</a>
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</div>
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</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre> <span class="k">def</span> <span class="nf">unify</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">point_store</span><span class="p">,</span> <span class="n">precision</span><span class="p">):</span>
|
|
<span class="kn">from</span> <span class="nn">kartograph.simplify</span> <span class="kn">import</span> <span class="n">unify_polygon</span>
|
|
<span class="bp">self</span><span class="o">.</span><span class="n">pts</span> <span class="o">=</span> <span class="n">unify_polygon</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">pts</span><span class="p">,</span> <span class="n">point_store</span><span class="p">,</span> <span class="n">precision</span><span class="p">)</span></pre></div>
|
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</div>
|
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</div>
|
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<div class='clearall'></div>
|
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<div class='section' id='section-32'>
|
|
<div class='docs'>
|
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<div class='octowrap'>
|
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<a class='octothorpe' href='#section-32'>#</a>
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</div>
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</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre> <span class="k">def</span> <span class="nf">points</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
|
|
<span class="k">return</span> <span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">pts</span><span class="p">]</span></pre></div>
|
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</div>
|
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</div>
|
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<div class='clearall'></div>
|
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<div class='section' id='section-33'>
|
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<div class='docs'>
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|
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<a class='octothorpe' href='#section-33'>#</a>
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</div>
|
|
<p>is called after the points of this geometry have been
|
|
changed from outside this class</p>
|
|
</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre> <span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span></pre></div>
|
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</div>
|
|
</div>
|
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<div class='clearall'></div>
|
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<div class='section' id='section-34'>
|
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<div class='docs'>
|
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<div class='octowrap'>
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<a class='octothorpe' href='#section-34'>#</a>
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</div>
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</div>
|
|
<div class='code'>
|
|
<div class="highlight"><pre> <span class="k">pass</span>
|
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|
|
</pre></div>
|
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</div>
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</div>
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<div class='clearall'></div>
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</div>
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</body>
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