<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Source to the Rust file `geom/src/circle.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>circle.rs.html -- source</title><link rel="stylesheet" type="text/css" href="../../normalize.css"><link rel="stylesheet" type="text/css" href="../../rustdoc.css" id="mainThemeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css"><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script src="../../storage.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="shortcut icon" href="../../favicon.ico"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[if lte IE 8]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu">☰</div><a href='../../geom/index.html'><div class='logo-container'><img src='../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!"><img src="../../brush.svg" width="18" alt="Pick another theme!"></button><div id="theme-choices"></div></div><script src="../../theme.js"></script><nav class="sub"><form class="search-form"><div class="search-container"><div><select id="crate-search"><option value="All crates">All crates</option></select><input class="search-input" name="search" disabled autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"></div><a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" alt="Change settings"></a></div></form></nav><section id="main" class="content"><pre class="line-numbers"><span id="1"> 1</span> <span id="2"> 2</span> <span id="3"> 3</span> <span id="4"> 4</span> <span id="5"> 5</span> <span id="6"> 6</span> <span id="7"> 7</span> <span id="8"> 8</span> <span id="9"> 9</span> <span id="10">10</span> <span id="11">11</span> <span id="12">12</span> <span id="13">13</span> <span id="14">14</span> <span id="15">15</span> <span id="16">16</span> <span id="17">17</span> <span id="18">18</span> <span id="19">19</span> <span id="20">20</span> <span id="21">21</span> <span id="22">22</span> <span id="23">23</span> <span id="24">24</span> <span id="25">25</span> <span id="26">26</span> <span id="27">27</span> <span id="28">28</span> <span id="29">29</span> <span id="30">30</span> <span id="31">31</span> <span id="32">32</span> <span id="33">33</span> <span id="34">34</span> <span id="35">35</span> <span id="36">36</span> <span id="37">37</span> <span id="38">38</span> <span id="39">39</span> <span id="40">40</span> <span id="41">41</span> <span id="42">42</span> <span id="43">43</span> <span id="44">44</span> <span id="45">45</span> <span id="46">46</span> <span id="47">47</span> <span id="48">48</span> <span id="49">49</span> <span id="50">50</span> <span id="51">51</span> <span id="52">52</span> <span id="53">53</span> <span id="54">54</span> <span id="55">55</span> <span id="56">56</span> <span id="57">57</span> <span id="58">58</span> <span id="59">59</span> <span id="60">60</span> <span id="61">61</span> <span id="62">62</span> <span id="63">63</span> <span id="64">64</span> <span id="65">65</span> <span id="66">66</span> <span id="67">67</span> <span id="68">68</span> <span id="69">69</span> <span id="70">70</span> <span id="71">71</span> <span id="72">72</span> <span id="73">73</span> <span id="74">74</span> <span id="75">75</span> <span id="76">76</span> <span id="77">77</span> <span id="78">78</span> <span id="79">79</span> <span id="80">80</span> <span id="81">81</span> <span id="82">82</span> <span id="83">83</span> <span id="84">84</span> <span id="85">85</span> <span id="86">86</span> <span id="87">87</span> <span id="88">88</span> <span id="89">89</span> <span id="90">90</span> </pre><div class="example-wrap"><pre class="rust "> <span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">Angle</span>, <span class="ident">Bounds</span>, <span class="ident">Distance</span>, <span class="ident">Polygon</span>, <span class="ident">Pt2D</span>, <span class="ident">Ring</span>}; <span class="kw">use</span> <span class="ident">serde</span>::{<span class="ident">Deserialize</span>, <span class="ident">Serialize</span>}; <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; <span class="kw">const</span> <span class="ident">TRIANGLES_PER_CIRCLE</span>: <span class="ident">usize</span> <span class="op">=</span> <span class="number">60</span>; <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">Debug</span>, <span class="ident">Clone</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Circle</span> { <span class="kw">pub</span> <span class="ident">center</span>: <span class="ident">Pt2D</span>, <span class="kw">pub</span> <span class="ident">radius</span>: <span class="ident">Distance</span>, } <span class="kw">impl</span> <span class="ident">Circle</span> { <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">center</span>: <span class="ident">Pt2D</span>, <span class="ident">radius</span>: <span class="ident">Distance</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Circle</span> { <span class="ident">Circle</span> { <span class="ident">center</span>, <span class="ident">radius</span> } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">contains_pt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">pt</span>: <span class="ident">Pt2D</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> { <span class="comment">// avoid sqrt by squaring radius instead</span> (<span class="ident">pt</span>.<span class="ident">x</span>() <span class="op">-</span> <span class="self">self</span>.<span class="ident">center</span>.<span class="ident">x</span>()).<span class="ident">powi</span>(<span class="number">2</span>) <span class="op">+</span> (<span class="ident">pt</span>.<span class="ident">y</span>() <span class="op">-</span> <span class="self">self</span>.<span class="ident">center</span>.<span class="ident">y</span>()).<span class="ident">powi</span>(<span class="number">2</span>) <span class="op"><</span> <span class="self">self</span>.<span class="ident">radius</span>.<span class="ident">inner_meters</span>().<span class="ident">powi</span>(<span class="number">2</span>) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_bounds</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Bounds</span> { <span class="ident">Bounds</span> { <span class="ident">min_x</span>: <span class="self">self</span>.<span class="ident">center</span>.<span class="ident">x</span>() <span class="op">-</span> <span class="self">self</span>.<span class="ident">radius</span>.<span class="ident">inner_meters</span>(), <span class="ident">max_x</span>: <span class="self">self</span>.<span class="ident">center</span>.<span class="ident">x</span>() <span class="op">+</span> <span class="self">self</span>.<span class="ident">radius</span>.<span class="ident">inner_meters</span>(), <span class="ident">min_y</span>: <span class="self">self</span>.<span class="ident">center</span>.<span class="ident">y</span>() <span class="op">-</span> <span class="self">self</span>.<span class="ident">radius</span>.<span class="ident">inner_meters</span>(), <span class="ident">max_y</span>: <span class="self">self</span>.<span class="ident">center</span>.<span class="ident">y</span>() <span class="op">+</span> <span class="self">self</span>.<span class="ident">radius</span>.<span class="ident">inner_meters</span>(), } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_polygon</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Polygon</span> { <span class="self">self</span>.<span class="ident">to_partial_polygon</span>(<span class="number">1.0</span>) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_partial_polygon</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">percent_full</span>: <span class="ident">f64</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Polygon</span> { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">pts</span> <span class="op">=</span> <span class="macro">vec</span><span class="macro">!</span>[<span class="self">self</span>.<span class="ident">center</span>]; <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">indices</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>(); <span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="number">0</span>..<span class="ident">TRIANGLES_PER_CIRCLE</span> { <span class="ident">pts</span>.<span class="ident">push</span>(<span class="self">self</span>.<span class="ident">center</span>.<span class="ident">project_away</span>( <span class="self">self</span>.<span class="ident">radius</span>, <span class="ident">Angle</span>::<span class="ident">new_degs</span>((<span class="ident">i</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">/</span> (<span class="ident">TRIANGLES_PER_CIRCLE</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">*</span> <span class="ident">percent_full</span> <span class="op">*</span> <span class="number">360.0</span>), )); <span class="ident">indices</span>.<span class="ident">push</span>(<span class="number">0</span>); <span class="ident">indices</span>.<span class="ident">push</span>(<span class="ident">i</span> <span class="op">+</span> <span class="number">1</span>); <span class="kw">if</span> <span class="ident">i</span> <span class="op">!</span><span class="op">=</span> <span class="ident">TRIANGLES_PER_CIRCLE</span> <span class="op">-</span> <span class="number">1</span> { <span class="ident">indices</span>.<span class="ident">push</span>(<span class="ident">i</span> <span class="op">+</span> <span class="number">2</span>); } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">percent_full</span> <span class="op">=</span><span class="op">=</span> <span class="number">1.0</span> { <span class="ident">indices</span>.<span class="ident">push</span>(<span class="number">1</span>); } <span class="kw">else</span> { <span class="ident">indices</span>.<span class="ident">pop</span>(); <span class="ident">indices</span>.<span class="ident">pop</span>(); } } <span class="ident">Polygon</span>::<span class="ident">precomputed</span>(<span class="ident">pts</span>, <span class="ident">indices</span>) } <span class="kw">fn</span> <span class="ident">to_ring</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-</span><span class="op">></span> <span class="ident">Ring</span> { <span class="ident">Ring</span>::<span class="ident">must_new</span>( (<span class="number">0</span>..<span class="op">=</span><span class="ident">TRIANGLES_PER_CIRCLE</span>) .<span class="ident">map</span>(<span class="op">|</span><span class="ident">i</span><span class="op">|</span> { <span class="self">self</span>.<span class="ident">center</span>.<span class="ident">project_away</span>( <span class="self">self</span>.<span class="ident">radius</span>, <span class="ident">Angle</span>::<span class="ident">new_degs</span>((<span class="ident">i</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">/</span> (<span class="ident">TRIANGLES_PER_CIRCLE</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">*</span> <span class="number">360.0</span>), ) }) .<span class="ident">collect</span>(), ) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">outline</span>(<span class="ident">center</span>: <span class="ident">Pt2D</span>, <span class="ident">radius</span>: <span class="ident">Distance</span>, <span class="ident">thickness</span>: <span class="ident">Distance</span>) <span class="op">-</span><span class="op">></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Polygon</span>, <span class="ident">String</span><span class="op">></span> { <span class="kw">if</span> <span class="ident">radius</span> <span class="op"><</span><span class="op">=</span> <span class="ident">thickness</span> { <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="macro">format</span><span class="macro">!</span>( <span class="string">"Can't make Circle outline with radius {} and thickness {}"</span>, <span class="ident">radius</span>, <span class="ident">thickness</span> )); } <span class="kw">let</span> <span class="ident">bigger</span> <span class="op">=</span> <span class="ident">Circle</span>::<span class="ident">new</span>(<span class="ident">center</span>, <span class="ident">radius</span>).<span class="ident">to_ring</span>(); <span class="kw">let</span> <span class="ident">smaller</span> <span class="op">=</span> <span class="ident">Circle</span>::<span class="ident">new</span>(<span class="ident">center</span>, <span class="ident">radius</span> <span class="op">-</span> <span class="ident">thickness</span>).<span class="ident">to_ring</span>(); <span class="prelude-val">Ok</span>(<span class="ident">Polygon</span>::<span class="ident">with_holes</span>(<span class="ident">bigger</span>, <span class="macro">vec</span><span class="macro">!</span>[<span class="ident">smaller</span>])) } } <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Circle</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-</span><span class="op">></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"Circle({}, {})"</span>, <span class="self">self</span>.<span class="ident">center</span>, <span class="self">self</span>.<span class="ident">radius</span>) } } </pre></div> </section><section id="search" class="content hidden"></section><section class="footer"></section><script>window.rootPath = "../../";window.currentCrate = "geom";</script><script src="../../main.js"></script><script src="../../source-script.js"></script><script src="../../source-files.js"></script><script defer src="../../search-index.js"></script></body></html>