<!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/ring.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>ring.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">&#9776;</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>
<span id="91"> 91</span>
<span id="92"> 92</span>
<span id="93"> 93</span>
<span id="94"> 94</span>
<span id="95"> 95</span>
<span id="96"> 96</span>
<span id="97"> 97</span>
<span id="98"> 98</span>
<span id="99"> 99</span>
<span id="100">100</span>
<span id="101">101</span>
<span id="102">102</span>
<span id="103">103</span>
<span id="104">104</span>
<span id="105">105</span>
<span id="106">106</span>
<span id="107">107</span>
<span id="108">108</span>
<span id="109">109</span>
<span id="110">110</span>
<span id="111">111</span>
<span id="112">112</span>
<span id="113">113</span>
<span id="114">114</span>
<span id="115">115</span>
<span id="116">116</span>
<span id="117">117</span>
<span id="118">118</span>
<span id="119">119</span>
<span id="120">120</span>
<span id="121">121</span>
<span id="122">122</span>
<span id="123">123</span>
<span id="124">124</span>
<span id="125">125</span>
<span id="126">126</span>
<span id="127">127</span>
<span id="128">128</span>
<span id="129">129</span>
<span id="130">130</span>
<span id="131">131</span>
<span id="132">132</span>
<span id="133">133</span>
<span id="134">134</span>
<span id="135">135</span>
<span id="136">136</span>
<span id="137">137</span>
<span id="138">138</span>
<span id="139">139</span>
<span id="140">140</span>
<span id="141">141</span>
<span id="142">142</span>
<span id="143">143</span>
<span id="144">144</span>
<span id="145">145</span>
<span id="146">146</span>
<span id="147">147</span>
<span id="148">148</span>
<span id="149">149</span>
<span id="150">150</span>
<span id="151">151</span>
<span id="152">152</span>
<span id="153">153</span>
<span id="154">154</span>
<span id="155">155</span>
<span id="156">156</span>
<span id="157">157</span>
<span id="158">158</span>
<span id="159">159</span>
<span id="160">160</span>
<span id="161">161</span>
</pre><div class="example-wrap"><pre class="rust ">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">collections</span>::<span class="ident">HashSet</span>;
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</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="kw">crate</span>::{<span class="ident">Distance</span>, <span class="ident">Line</span>, <span class="ident">PolyLine</span>, <span class="ident">Polygon</span>, <span class="ident">Pt2D</span>};

<span class="comment">// Maybe a misnomer, but like a PolyLine, but closed.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Ring</span> {
    <span class="comment">// first equals last</span>
    <span class="ident">pts</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Pt2D</span><span class="op">&gt;</span>,
}

<span class="kw">impl</span> <span class="ident">Ring</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">pts</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Pt2D</span><span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">Ring</span>, <span class="ident">String</span><span class="op">&gt;</span> {
        <span class="kw">if</span> <span class="ident">pts</span>.<span class="ident">len</span>() <span class="op">&lt;</span> <span class="number">3</span> {
            <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;Can&#39;t make a ring with &lt; 3 points&quot;</span>));
        }
        <span class="kw">if</span> <span class="ident">pts</span>[<span class="number">0</span>] <span class="op">!</span><span class="op">=</span> <span class="kw-2">*</span><span class="ident">pts</span>.<span class="ident">last</span>().<span class="ident">unwrap</span>() {
            <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="macro">format</span><span class="macro">!</span>(
                <span class="string">&quot;Can&#39;t make a ring with mismatching first/last points&quot;</span>
            ));
        }

        <span class="kw">if</span> <span class="ident">pts</span>.<span class="ident">windows</span>(<span class="number">2</span>).<span class="ident">any</span>(<span class="op">|</span><span class="ident">pair</span><span class="op">|</span> <span class="ident">pair</span>[<span class="number">0</span>] <span class="op">=</span><span class="op">=</span> <span class="ident">pair</span>[<span class="number">1</span>]) {
            <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;Ring has ~dupe adjacent pts&quot;</span>));
        }

        <span class="kw">let</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">Ring</span> { <span class="ident">pts</span> };

        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">seen_pts</span> <span class="op">=</span> <span class="ident">HashSet</span>::<span class="ident">new</span>();
        <span class="kw">for</span> <span class="ident">pt</span> <span class="kw">in</span> <span class="ident">result</span>.<span class="ident">pts</span>.<span class="ident">iter</span>().<span class="ident">skip</span>(<span class="number">1</span>) {
            <span class="ident">seen_pts</span>.<span class="ident">insert</span>(<span class="ident">pt</span>.<span class="ident">to_hashable</span>());
        }
        <span class="kw">if</span> <span class="ident">seen_pts</span>.<span class="ident">len</span>() <span class="op">!</span><span class="op">=</span> <span class="ident">result</span>.<span class="ident">pts</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">1</span> {
            <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;Ring has repeat non-adjacent points&quot;</span>));
        }

        <span class="prelude-val">Ok</span>(<span class="ident">result</span>)
    }
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">must_new</span>(<span class="ident">pts</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Pt2D</span><span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Ring</span> {
        <span class="ident">Ring</span>::<span class="ident">new</span>(<span class="ident">pts</span>).<span class="ident">unwrap</span>()
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_outline</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">thickness</span>: <span class="ident">Distance</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Polygon</span> {
        <span class="comment">// TODO Has a weird corner. Use the polygon offset thing instead?</span>
        <span class="ident">PolyLine</span>::<span class="ident">unchecked_new</span>(<span class="self">self</span>.<span class="ident">pts</span>.<span class="ident">clone</span>()).<span class="ident">make_polygons</span>(<span class="ident">thickness</span>)
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_polygon</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Polygon</span> {
        <span class="ident">Polygon</span>::<span class="ident">with_holes</span>(<span class="self">self</span>, <span class="ident">Vec</span>::<span class="ident">new</span>())
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">points</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="kw-2">&amp;</span><span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Pt2D</span><span class="op">&gt;</span> {
        <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">pts</span>
    }
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">into_points</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Pt2D</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">pts</span>
    }

    <span class="comment">// Be careful with the order of results. Hits on an earlier line segment of other show up first,</span>
    <span class="comment">// but if the ring hits a line segment at multiple points, who knows. Dedupes.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">all_intersections</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&amp;</span><span class="ident">PolyLine</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Pt2D</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">hits</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">seen</span> <span class="op">=</span> <span class="ident">HashSet</span>::<span class="ident">new</span>();
        <span class="kw">for</span> <span class="ident">l1</span> <span class="kw">in</span> <span class="ident">other</span>.<span class="ident">lines</span>() {
            <span class="kw">for</span> <span class="ident">l2</span> <span class="kw">in</span> <span class="self">self</span>
                .<span class="ident">pts</span>
                .<span class="ident">windows</span>(<span class="number">2</span>)
                .<span class="ident">map</span>(<span class="op">|</span><span class="ident">pair</span><span class="op">|</span> <span class="ident">Line</span>::<span class="ident">must_new</span>(<span class="ident">pair</span>[<span class="number">0</span>], <span class="ident">pair</span>[<span class="number">1</span>]))
            {
                <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">pt</span>) <span class="op">=</span> <span class="ident">l1</span>.<span class="ident">intersection</span>(<span class="kw-2">&amp;</span><span class="ident">l2</span>) {
                    <span class="kw">if</span> <span class="op">!</span><span class="ident">seen</span>.<span class="ident">contains</span>(<span class="kw-2">&amp;</span><span class="ident">pt</span>.<span class="ident">to_hashable</span>()) {
                        <span class="ident">hits</span>.<span class="ident">push</span>(<span class="ident">pt</span>);
                        <span class="ident">seen</span>.<span class="ident">insert</span>(<span class="ident">pt</span>.<span class="ident">to_hashable</span>());
                    }
                }
            }
        }
        <span class="ident">hits</span>
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_both_slices_btwn</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">pt1</span>: <span class="ident">Pt2D</span>, <span class="ident">pt2</span>: <span class="ident">Pt2D</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span>(<span class="ident">PolyLine</span>, <span class="ident">PolyLine</span>)<span class="op">&gt;</span> {
        <span class="macro">assert</span><span class="macro">!</span>(<span class="ident">pt1</span> <span class="op">!</span><span class="op">=</span> <span class="ident">pt2</span>);
        <span class="kw">let</span> <span class="ident">pl</span> <span class="op">=</span> <span class="ident">PolyLine</span>::<span class="ident">unchecked_new</span>(<span class="self">self</span>.<span class="ident">pts</span>.<span class="ident">clone</span>());

        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">dist1</span> <span class="op">=</span> <span class="ident">pl</span>.<span class="ident">dist_along_of_point</span>(<span class="ident">pt1</span>).<span class="ident">unwrap</span>().<span class="number">0</span>;
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">dist2</span> <span class="op">=</span> <span class="ident">pl</span>.<span class="ident">dist_along_of_point</span>(<span class="ident">pt2</span>).<span class="ident">unwrap</span>().<span class="number">0</span>;
        <span class="kw">if</span> <span class="ident">dist1</span> <span class="op">&gt;</span> <span class="ident">dist2</span> {
            <span class="ident">std</span>::<span class="ident">mem</span>::<span class="ident">swap</span>(<span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">dist1</span>, <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">dist2</span>);
        }
        <span class="kw">if</span> <span class="ident">dist1</span> <span class="op">=</span><span class="op">=</span> <span class="ident">dist2</span> {
            <span class="kw">return</span> <span class="prelude-val">None</span>;
        }

        <span class="kw">let</span> <span class="ident">candidate1</span> <span class="op">=</span> <span class="ident">pl</span>.<span class="ident">maybe_exact_slice</span>(<span class="ident">dist1</span>, <span class="ident">dist2</span>).<span class="ident">ok</span>()<span class="question-mark">?</span>;
        <span class="kw">let</span> <span class="ident">candidate2</span> <span class="op">=</span> <span class="ident">pl</span>
            .<span class="ident">maybe_exact_slice</span>(<span class="ident">dist2</span>, <span class="ident">pl</span>.<span class="ident">length</span>())
            .<span class="ident">ok</span>()<span class="question-mark">?</span>
            .<span class="ident">must_extend</span>(<span class="ident">pl</span>.<span class="ident">maybe_exact_slice</span>(<span class="ident">Distance</span>::<span class="ident">ZERO</span>, <span class="ident">dist1</span>).<span class="ident">ok</span>()<span class="question-mark">?</span>);
        <span class="prelude-val">Some</span>((<span class="ident">candidate1</span>, <span class="ident">candidate2</span>))
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_shorter_slice_btwn</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">pt1</span>: <span class="ident">Pt2D</span>, <span class="ident">pt2</span>: <span class="ident">Pt2D</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">PolyLine</span> {
        <span class="kw">let</span> (<span class="ident">candidate1</span>, <span class="ident">candidate2</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">get_both_slices_btwn</span>(<span class="ident">pt1</span>, <span class="ident">pt2</span>).<span class="ident">unwrap</span>();
        <span class="kw">if</span> <span class="ident">candidate1</span>.<span class="ident">length</span>() <span class="op">&lt;</span> <span class="ident">candidate2</span>.<span class="ident">length</span>() {
            <span class="ident">candidate1</span>
        } <span class="kw">else</span> {
            <span class="ident">candidate2</span>
        }
    }

    <span class="comment">// Extract all PolyLines and Rings. Doesn&#39;t handle crazy double loops and stuff.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">split_points</span>(<span class="ident">pts</span>: <span class="kw-2">&amp;</span><span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Pt2D</span><span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span>(<span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">PolyLine</span><span class="op">&gt;</span>, <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Ring</span><span class="op">&gt;</span>), <span class="ident">String</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">seen</span> <span class="op">=</span> <span class="ident">HashSet</span>::<span class="ident">new</span>();
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">intersections</span> <span class="op">=</span> <span class="ident">HashSet</span>::<span class="ident">new</span>();
        <span class="kw">for</span> <span class="ident">pt</span> <span class="kw">in</span> <span class="ident">pts</span> {
            <span class="kw">let</span> <span class="ident">pt</span> <span class="op">=</span> <span class="ident">pt</span>.<span class="ident">to_hashable</span>();
            <span class="kw">if</span> <span class="ident">seen</span>.<span class="ident">contains</span>(<span class="kw-2">&amp;</span><span class="ident">pt</span>) {
                <span class="ident">intersections</span>.<span class="ident">insert</span>(<span class="ident">pt</span>);
            } <span class="kw">else</span> {
                <span class="ident">seen</span>.<span class="ident">insert</span>(<span class="ident">pt</span>);
            }
        }
        <span class="ident">intersections</span>.<span class="ident">insert</span>(<span class="ident">pts</span>[<span class="number">0</span>].<span class="ident">to_hashable</span>());
        <span class="ident">intersections</span>.<span class="ident">insert</span>(<span class="ident">pts</span>.<span class="ident">last</span>().<span class="ident">unwrap</span>().<span class="ident">to_hashable</span>());

        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">polylines</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">rings</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">current</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
        <span class="kw">for</span> <span class="ident">pt</span> <span class="kw">in</span> <span class="ident">pts</span>.<span class="ident">iter</span>().<span class="ident">cloned</span>() {
            <span class="ident">current</span>.<span class="ident">push</span>(<span class="ident">pt</span>);
            <span class="kw">if</span> <span class="ident">intersections</span>.<span class="ident">contains</span>(<span class="kw-2">&amp;</span><span class="ident">pt</span>.<span class="ident">to_hashable</span>()) <span class="kw-2">&amp;</span><span class="op">&amp;</span> <span class="ident">current</span>.<span class="ident">len</span>() <span class="op">&gt;</span> <span class="number">1</span> {
                <span class="kw">if</span> <span class="ident">current</span>[<span class="number">0</span>] <span class="op">=</span><span class="op">=</span> <span class="ident">pt</span> <span class="kw-2">&amp;</span><span class="op">&amp;</span> <span class="ident">current</span>.<span class="ident">len</span>() <span class="op">&gt;</span><span class="op">=</span> <span class="number">3</span> {
                    <span class="ident">rings</span>.<span class="ident">push</span>(<span class="ident">Ring</span>::<span class="ident">must_new</span>(<span class="ident">current</span>.<span class="ident">drain</span>(..).<span class="ident">collect</span>()));
                } <span class="kw">else</span> {
                    <span class="ident">polylines</span>.<span class="ident">push</span>(<span class="ident">PolyLine</span>::<span class="ident">new</span>(<span class="ident">current</span>.<span class="ident">drain</span>(..).<span class="ident">collect</span>())<span class="question-mark">?</span>);
                }
                <span class="ident">current</span>.<span class="ident">push</span>(<span class="ident">pt</span>);
            }
        }
        <span class="prelude-val">Ok</span>((<span class="ident">polylines</span>, <span class="ident">rings</span>))
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">contains_pt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">pt</span>: <span class="ident">Pt2D</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">bool</span> {
        <span class="ident">PolyLine</span>::<span class="ident">unchecked_new</span>(<span class="self">self</span>.<span class="ident">pts</span>.<span class="ident">clone</span>())
            .<span class="ident">dist_along_of_point</span>(<span class="ident">pt</span>)
            .<span class="ident">is_some</span>()
    }
}

<span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Ring</span> {
    <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> {
        <span class="macro">writeln</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">&quot;Ring::new(vec![&quot;</span>)<span class="question-mark">?</span>;
        <span class="kw">for</span> <span class="ident">pt</span> <span class="kw">in</span> <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">pts</span> {
            <span class="macro">writeln</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">&quot;  Pt2D::new({}, {}),&quot;</span>, <span class="ident">pt</span>.<span class="ident">x</span>(), <span class="ident">pt</span>.<span class="ident">y</span>())<span class="question-mark">?</span>;
        }
        <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">&quot;])&quot;</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>