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<title>geometry_plot &#8212; pylib 2019.5.19 documentation</title>
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<h1>Source code for geometry_plot</h1><div class="highlight"><pre>
<span></span><span class="ch">#!/usr/bin/env python</span>
<span class="c1"># -*- coding: utf-8 -*-</span>
<span class="sd">&quot;&quot;&quot;2D geometry plotter using matplotlib (pylab).</span>
<span class="sd">:Date: 2019-08-20</span>
<span class="sd">.. module:: geometry_plot</span>
<span class="sd"> :platform: *nix, Windows</span>
<span class="sd"> :synopsis: Geometry plotting.</span>
<span class="sd">.. moduleauthor:: Daniel Weschke &lt;daniel.weschke@directbox.de&gt;</span>
<span class="sd">&quot;&quot;&quot;</span>
<span class="kn">import</span> <span class="nn">math</span>
<span class="kn">import</span> <span class="nn">pylab</span>
<span class="kn">from</span> <span class="nn">geometry</span> <span class="k">import</span> <span class="p">(</span>
<span class="n">distance</span><span class="p">,</span> <span class="n">angle</span><span class="p">,</span> <span class="n">line</span><span class="p">,</span> <span class="n">interpolate_hermite</span><span class="p">,</span> <span class="n">rotate_xy</span><span class="p">,</span> <span class="n">translate_xy</span>
<span class="p">)</span>
<span class="n">pylab</span><span class="o">.</span><span class="n">style</span><span class="o">.</span><span class="n">use</span><span class="p">(</span><span class="s1">&#39;dark_background&#39;</span><span class="p">)</span>
<span class="n">pylab</span><span class="o">.</span><span class="n">rcParams</span><span class="p">[</span><span class="s1">&#39;grid.color&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s1">&#39;gray&#39;</span>
<span class="c1"># The kwargs are Line2D properties:</span>
<span class="c1"># https://matplotlib.org/3.1.1/_modules/matplotlib/lines.html#Line2D</span>
<span class="c1"># https://matplotlib.org/devdocs/_modules/matplotlib/lines.html#Line2D</span>
<span class="n">pylab_Line2D_properties</span> <span class="o">=</span> <span class="p">[</span>
<span class="s1">&#39;linewidth&#39;</span><span class="p">,</span> <span class="s1">&#39;linestyle&#39;</span><span class="p">,</span> <span class="s1">&#39;color&#39;</span><span class="p">,</span>
<span class="s1">&#39;marker&#39;</span><span class="p">,</span> <span class="s1">&#39;markersize&#39;</span><span class="p">,</span> <span class="s1">&#39;markeredgewidth&#39;</span><span class="p">,</span> <span class="s1">&#39;markeredgecolor&#39;</span><span class="p">,</span>
<span class="s1">&#39;markerfacecolor&#39;</span><span class="p">,</span> <span class="s1">&#39;markerfacecoloralt&#39;</span><span class="p">,</span>
<span class="s1">&#39;fillstyle&#39;</span><span class="p">,</span> <span class="s1">&#39;antialiased&#39;</span><span class="p">,</span>
<span class="s1">&#39;dash_capstyle&#39;</span><span class="p">,</span> <span class="s1">&#39;solid_capstyle&#39;</span><span class="p">,</span>
<span class="s1">&#39;dash_joinstyle&#39;</span><span class="p">,</span> <span class="s1">&#39;solid_joinstyle&#39;</span><span class="p">,</span>
<span class="s1">&#39;pickradius&#39;</span><span class="p">,</span> <span class="s1">&#39;drawstyle&#39;</span><span class="p">,</span> <span class="s1">&#39;markevery&#39;</span><span class="p">,</span>
<span class="p">]</span>
<div class="viewcode-block" id="plot_lines"><a class="viewcode-back" href="../geometry_plot.html#geometry_plot.plot_lines">[docs]</a><span class="k">def</span> <span class="nf">plot_lines</span><span class="p">(</span><span class="n">lns</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">if</span> <span class="s1">&#39;color&#39;</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">kwargs</span><span class="p">:</span>
<span class="c1"># Colors from &quot;tab10&quot; colormap</span>
<span class="n">cmap</span> <span class="o">=</span> <span class="n">pylab</span><span class="o">.</span><span class="n">get_cmap</span><span class="p">(</span><span class="s2">&quot;tab10&quot;</span><span class="p">)</span>
<span class="n">kwargs</span><span class="p">[</span><span class="s1">&#39;color&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">cmap</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="c1"># Colors from color cycle</span>
<span class="n">cycle</span> <span class="o">=</span> <span class="n">pylab</span><span class="o">.</span><span class="n">rcParams</span><span class="p">[</span><span class="s1">&#39;axes.prop_cycle&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">by_key</span><span class="p">()[</span><span class="s1">&#39;color&#39;</span><span class="p">]</span>
<span class="n">kwargs</span><span class="p">[</span><span class="s1">&#39;color&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">cycle</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="c1"># Colors from CN notation (same as the first 10 colors from the color cycle)</span>
<span class="n">kwargs</span><span class="p">[</span><span class="s1">&#39;color&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s2">&quot;C0&quot;</span>
<span class="k">for</span> <span class="n">ln</span> <span class="ow">in</span> <span class="n">lns</span><span class="p">:</span>
<span class="n">x</span><span class="p">,</span> <span class="n">y</span> <span class="o">=</span> <span class="n">line</span><span class="p">(</span><span class="o">*</span><span class="n">ln</span><span class="p">)</span>
<span class="n">pylab</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span></div>
<div class="viewcode-block" id="plot_cubic_lines"><a class="viewcode-back" href="../geometry_plot.html#geometry_plot.plot_cubic_lines">[docs]</a><span class="k">def</span> <span class="nf">plot_cubic_lines</span><span class="p">(</span><span class="n">lns</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">if</span> <span class="s1">&#39;color&#39;</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">kwargs</span><span class="p">:</span>
<span class="c1"># Colors from &quot;tab10&quot; colormap</span>
<span class="n">cmap</span> <span class="o">=</span> <span class="n">pylab</span><span class="o">.</span><span class="n">get_cmap</span><span class="p">(</span><span class="s2">&quot;tab10&quot;</span><span class="p">)</span>
<span class="n">kwargs</span><span class="p">[</span><span class="s1">&#39;color&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">cmap</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="c1"># Colors from color cycle</span>
<span class="n">cycle</span> <span class="o">=</span> <span class="n">pylab</span><span class="o">.</span><span class="n">rcParams</span><span class="p">[</span><span class="s1">&#39;axes.prop_cycle&#39;</span><span class="p">]</span><span class="o">.</span><span class="n">by_key</span><span class="p">()[</span><span class="s1">&#39;color&#39;</span><span class="p">]</span>
<span class="n">kwargs</span><span class="p">[</span><span class="s1">&#39;color&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="n">cycle</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span>
<span class="c1"># Colors from CN notation (same as the first 10 colors from the color cycle)</span>
<span class="n">kwargs</span><span class="p">[</span><span class="s1">&#39;color&#39;</span><span class="p">]</span> <span class="o">=</span> <span class="s2">&quot;C0&quot;</span>
<span class="n">factor</span> <span class="o">=</span> <span class="mi">1</span>
<span class="k">if</span> <span class="s1">&#39;factor&#39;</span> <span class="ow">in</span> <span class="n">kwargs</span><span class="p">:</span>
<span class="n">factor</span> <span class="o">=</span> <span class="n">kwargs</span><span class="p">[</span><span class="s1">&#39;factor&#39;</span><span class="p">]</span>
<span class="n">samples</span> <span class="o">=</span> <span class="mi">10</span>
<span class="k">if</span> <span class="s1">&#39;samples&#39;</span> <span class="ow">in</span> <span class="n">kwargs</span><span class="p">:</span>
<span class="n">samples</span> <span class="o">=</span> <span class="n">kwargs</span><span class="p">[</span><span class="s1">&#39;samples&#39;</span><span class="p">]</span>
<span class="n">kwargs</span> <span class="o">=</span> <span class="p">{</span><span class="n">k</span><span class="p">:</span> <span class="n">v</span> <span class="k">for</span> <span class="n">k</span><span class="p">,</span> <span class="n">v</span> <span class="ow">in</span> <span class="n">kwargs</span><span class="o">.</span><span class="n">items</span><span class="p">()</span> <span class="k">if</span> <span class="n">k</span> <span class="ow">in</span> <span class="n">pylab_Line2D_properties</span><span class="p">}</span>
<span class="k">for</span> <span class="n">ln</span> <span class="ow">in</span> <span class="n">lns</span><span class="p">:</span>
<span class="n">l</span><span class="p">,</span> <span class="n">r</span><span class="p">,</span> <span class="n">d</span> <span class="o">=</span> <span class="n">ln</span>
<span class="n">L</span> <span class="o">=</span> <span class="n">distance</span><span class="p">(</span><span class="n">l</span><span class="p">,</span> <span class="n">r</span><span class="p">)</span>
<span class="n">ang</span> <span class="o">=</span> <span class="n">angle</span><span class="p">(</span><span class="n">l</span><span class="p">,</span> <span class="n">r</span><span class="p">)</span>
<span class="n">x</span><span class="p">,</span> <span class="n">y</span> <span class="o">=</span> <span class="n">interpolate_hermite</span><span class="p">(</span><span class="n">d</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="n">d</span><span class="p">[</span><span class="mi">2</span><span class="p">],</span> <span class="n">d</span><span class="p">[</span><span class="mi">4</span><span class="p">],</span> <span class="n">d</span><span class="p">[</span><span class="mi">5</span><span class="p">],</span> <span class="n">d</span><span class="p">[</span><span class="mi">0</span><span class="p">],</span> <span class="n">d</span><span class="p">[</span><span class="mi">3</span><span class="p">],</span>
<span class="n">scale_x</span><span class="o">=</span><span class="n">L</span><span class="p">,</span> <span class="n">scale_y</span><span class="o">=</span><span class="n">factor</span><span class="p">,</span> <span class="n">samples</span><span class="o">=</span><span class="n">samples</span><span class="p">)</span>
<span class="n">x</span><span class="p">,</span> <span class="n">y</span> <span class="o">=</span> <span class="n">rotate_xy</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">ang</span><span class="p">,</span> <span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">)</span>
<span class="n">x</span><span class="p">,</span> <span class="n">y</span> <span class="o">=</span> <span class="n">translate_xy</span><span class="p">(</span><span class="n">l</span><span class="p">,</span> <span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">)</span>
<span class="n">pylab</span><span class="o">.</span><span class="n">plot</span><span class="p">(</span><span class="n">x</span><span class="p">,</span> <span class="n">y</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span></div>
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