<!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 of the Rust file `geom/src/pt.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>pt.rs - 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="../../light.css"  id="themeStyle"><link rel="stylesheet" type="text/css" href="../../dark.css" disabled ><link rel="stylesheet" type="text/css" href="../../ayu.css" disabled ><script id="default-settings"></script><script src="../../storage.js"></script><script src="../../crates.js"></script><noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="icon" type="image/svg+xml" href="../../favicon.svg">
<link rel="alternate icon" type="image/png" href="../../favicon-16x16.png">
<link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><style type="text/css">#crate-search{background-image:url("../../down-arrow.svg");}</style></head><body class="rustdoc source"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="sidebar-menu" role="button">&#9776;</div><a href='../../geom/index.html'><div class='logo-container rust-logo'><img src='../../rust-logo.png' alt='logo'></div></a></nav><div class="theme-picker"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu"><img src="../../brush.svg" width="18" height="18" alt="Pick another theme!"></button><div id="theme-choices" role="menu"></div></div><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><button type="button" class="help-button">?</button>
                <a id="settings-menu" href="../../settings.html"><img src="../../wheel.svg" width="18" height="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>
<span id="162">162</span>
<span id="163">163</span>
<span id="164">164</span>
<span id="165">165</span>
<span id="166">166</span>
<span id="167">167</span>
<span id="168">168</span>
<span id="169">169</span>
<span id="170">170</span>
<span id="171">171</span>
<span id="172">172</span>
<span id="173">173</span>
<span id="174">174</span>
<span id="175">175</span>
<span id="176">176</span>
<span id="177">177</span>
<span id="178">178</span>
<span id="179">179</span>
<span id="180">180</span>
<span id="181">181</span>
<span id="182">182</span>
<span id="183">183</span>
<span id="184">184</span>
<span id="185">185</span>
<span id="186">186</span>
<span id="187">187</span>
<span id="188">188</span>
<span id="189">189</span>
<span id="190">190</span>
<span id="191">191</span>
<span id="192">192</span>
<span id="193">193</span>
<span id="194">194</span>
<span id="195">195</span>
<span id="196">196</span>
<span id="197">197</span>
<span id="198">198</span>
<span id="199">199</span>
<span id="200">200</span>
<span id="201">201</span>
<span id="202">202</span>
<span id="203">203</span>
<span id="204">204</span>
<span id="205">205</span>
<span id="206">206</span>
<span id="207">207</span>
<span id="208">208</span>
<span id="209">209</span>
<span id="210">210</span>
<span id="211">211</span>
<span id="212">212</span>
<span id="213">213</span>
<span id="214">214</span>
</pre><div class="example-wrap"><pre class="rust ">
<span class="kw">use</span> <span class="ident">std::fmt</span>;

<span class="kw">use</span> <span class="ident">ordered_float::NotNan</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">deserialize_f64</span>, <span class="ident">serialize_f64</span>, <span class="ident">trim_f64</span>, <span class="ident">Angle</span>, <span class="ident">Distance</span>, <span class="ident">GPSBounds</span>, <span class="ident">LonLat</span>, <span class="ident">EPSILON_DIST</span>,
};

<span class="doccomment">/// This represents world-space in meters.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</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">Pt2D</span> {
    <span class="attribute">#[<span class="ident">serde</span>(<span class="ident">serialize_with</span> <span class="op">=</span> <span class="string">&quot;serialize_f64&quot;</span>, <span class="ident">deserialize_with</span> <span class="op">=</span> <span class="string">&quot;deserialize_f64&quot;</span>)]</span>
    <span class="ident">x</span>: <span class="ident">f64</span>,
    <span class="attribute">#[<span class="ident">serde</span>(<span class="ident">serialize_with</span> <span class="op">=</span> <span class="string">&quot;serialize_f64&quot;</span>, <span class="ident">deserialize_with</span> <span class="op">=</span> <span class="string">&quot;deserialize_f64&quot;</span>)]</span>
    <span class="ident">y</span>: <span class="ident">f64</span>,
}

<span class="kw">impl</span> <span class="ident">std::cmp::PartialEq</span> <span class="kw">for</span> <span class="ident">Pt2D</span> {
    <span class="kw">fn</span> <span class="ident">eq</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">Pt2D</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">bool</span> {
        <span class="self">self</span>.<span class="ident">approx_eq</span>(<span class="kw-2">*</span><span class="ident">other</span>, <span class="ident">EPSILON_DIST</span>)
    }
}

<span class="kw">impl</span> <span class="ident">Pt2D</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">x</span>: <span class="ident">f64</span>, <span class="ident">y</span>: <span class="ident">f64</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Pt2D</span> {
        <span class="kw">if</span> <span class="op">!</span><span class="ident">x</span>.<span class="ident">is_finite</span>() <span class="op">|</span><span class="op">|</span> <span class="op">!</span><span class="ident">y</span>.<span class="ident">is_finite</span>() {
            <span class="macro">panic!</span>(<span class="string">&quot;Bad Pt2D {}, {}&quot;</span>, <span class="ident">x</span>, <span class="ident">y</span>);
        }

        <span class="comment">// TODO enforce &gt;=0</span>

        <span class="ident">Pt2D</span> {
            <span class="ident">x</span>: <span class="ident">trim_f64</span>(<span class="ident">x</span>),
            <span class="ident">y</span>: <span class="ident">trim_f64</span>(<span class="ident">y</span>),
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">zero</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="self">Self</span> {
        <span class="self">Self</span><span class="ident">::new</span>(<span class="number">0.0</span>, <span class="number">0.0</span>)
    }

    <span class="comment">// TODO This is a small first step...</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">approx_eq</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Pt2D</span>, <span class="ident">threshold</span>: <span class="ident">Distance</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">bool</span> {
        <span class="self">self</span>.<span class="ident">dist_to</span>(<span class="ident">other</span>) <span class="op">&lt;</span><span class="op">=</span> <span class="ident">threshold</span>
    }

    <span class="doccomment">/// Can go out of bounds.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_gps</span>(<span class="self">self</span>, <span class="ident">b</span>: <span class="kw-2">&amp;</span><span class="ident">GPSBounds</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">LonLat</span> {
        <span class="kw">let</span> (<span class="ident">width</span>, <span class="ident">height</span>) <span class="op">=</span> {
            <span class="kw">let</span> <span class="ident">pt</span> <span class="op">=</span> <span class="ident">b</span>.<span class="ident">get_max_world_pt</span>();
            (<span class="ident">pt</span>.<span class="ident">x</span>(), <span class="ident">pt</span>.<span class="ident">y</span>())
        };
        <span class="kw">let</span> <span class="ident">lon</span> <span class="op">=</span> (<span class="self">self</span>.<span class="ident">x</span>() <span class="op">/</span> <span class="ident">width</span> <span class="op">*</span> (<span class="ident">b</span>.<span class="ident">max_lon</span> <span class="op">-</span> <span class="ident">b</span>.<span class="ident">min_lon</span>)) <span class="op">+</span> <span class="ident">b</span>.<span class="ident">min_lon</span>;
        <span class="kw">let</span> <span class="ident">lat</span> <span class="op">=</span> <span class="ident">b</span>.<span class="ident">min_lat</span> <span class="op">+</span> ((<span class="ident">b</span>.<span class="ident">max_lat</span> <span class="op">-</span> <span class="ident">b</span>.<span class="ident">min_lat</span>) <span class="op">*</span> (<span class="ident">height</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">y</span>()) <span class="op">/</span> <span class="ident">height</span>);
        <span class="ident">LonLat::new</span>(<span class="ident">lon</span>, <span class="ident">lat</span>)
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">x</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">f64</span> {
        <span class="self">self</span>.<span class="ident">x</span>
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">y</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">f64</span> {
        <span class="self">self</span>.<span class="ident">y</span>
    }

    <span class="comment">// TODO better name</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">project_away</span>(<span class="self">self</span>, <span class="ident">dist</span>: <span class="ident">Distance</span>, <span class="ident">theta</span>: <span class="ident">Angle</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Pt2D</span> {
        <span class="comment">// If negative, caller should use theta.opposite()</span>
        <span class="macro">assert!</span>(<span class="ident">dist</span> <span class="op">&gt;</span><span class="op">=</span> <span class="ident">Distance::ZERO</span>);

        <span class="kw">let</span> (<span class="ident">sin</span>, <span class="ident">cos</span>) <span class="op">=</span> <span class="ident">theta</span>.<span class="ident">normalized_radians</span>().<span class="ident">sin_cos</span>();
        <span class="ident">Pt2D::new</span>(
            <span class="self">self</span>.<span class="ident">x</span>() <span class="op">+</span> <span class="ident">dist</span>.<span class="ident">inner_meters</span>() <span class="op">*</span> <span class="ident">cos</span>,
            <span class="self">self</span>.<span class="ident">y</span>() <span class="op">+</span> <span class="ident">dist</span>.<span class="ident">inner_meters</span>() <span class="op">*</span> <span class="ident">sin</span>,
        )
    }

    <span class="comment">// TODO valid to do euclidean distance on world-space points that&#39;re formed from</span>
    <span class="comment">// Haversine?</span>
    <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">raw_dist_to</span>(<span class="self">self</span>, <span class="ident">to</span>: <span class="ident">Pt2D</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">f64</span> {
        ((<span class="self">self</span>.<span class="ident">x</span>() <span class="op">-</span> <span class="ident">to</span>.<span class="ident">x</span>()).<span class="ident">powi</span>(<span class="number">2</span>) <span class="op">+</span> (<span class="self">self</span>.<span class="ident">y</span>() <span class="op">-</span> <span class="ident">to</span>.<span class="ident">y</span>()).<span class="ident">powi</span>(<span class="number">2</span>)).<span class="ident">sqrt</span>()
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">dist_to</span>(<span class="self">self</span>, <span class="ident">to</span>: <span class="ident">Pt2D</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Distance</span> {
        <span class="ident">Distance::meters</span>(<span class="self">self</span>.<span class="ident">raw_dist_to</span>(<span class="ident">to</span>))
    }

    <span class="doccomment">/// Pretty meaningless units, for comparing distances very roughly</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">fast_dist</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Pt2D</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">NotNan</span><span class="op">&lt;</span><span class="ident">f64</span><span class="op">&gt;</span> {
        <span class="ident">NotNan::new</span>((<span class="self">self</span>.<span class="ident">x</span>() <span class="op">-</span> <span class="ident">other</span>.<span class="ident">x</span>()).<span class="ident">powi</span>(<span class="number">2</span>) <span class="op">+</span> (<span class="self">self</span>.<span class="ident">y</span>() <span class="op">-</span> <span class="ident">other</span>.<span class="ident">y</span>()).<span class="ident">powi</span>(<span class="number">2</span>)).<span class="ident">unwrap</span>()
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">angle_to</span>(<span class="self">self</span>, <span class="ident">to</span>: <span class="ident">Pt2D</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Angle</span> {
        <span class="comment">// DON&#39;T invert y here</span>
        <span class="ident">Angle::new_rads</span>((<span class="ident">to</span>.<span class="ident">y</span>() <span class="op">-</span> <span class="self">self</span>.<span class="ident">y</span>()).<span class="ident">atan2</span>(<span class="ident">to</span>.<span class="ident">x</span>() <span class="op">-</span> <span class="self">self</span>.<span class="ident">x</span>()))
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">offset</span>(<span class="self">self</span>, <span class="ident">dx</span>: <span class="ident">f64</span>, <span class="ident">dy</span>: <span class="ident">f64</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Pt2D</span> {
        <span class="ident">Pt2D::new</span>(<span class="self">self</span>.<span class="ident">x</span>() <span class="op">+</span> <span class="ident">dx</span>, <span class="self">self</span>.<span class="ident">y</span>() <span class="op">+</span> <span class="ident">dy</span>)
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">center</span>(<span class="ident">pts</span>: <span class="kw-2">&amp;</span>[<span class="ident">Pt2D</span>]) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Pt2D</span> {
        <span class="kw">if</span> <span class="ident">pts</span>.<span class="ident">is_empty</span>() {
            <span class="macro">panic!</span>(<span class="string">&quot;Can&#39;t find center of 0 points&quot;</span>);
        }
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">x</span> <span class="op">=</span> <span class="number">0.0</span>;
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">y</span> <span class="op">=</span> <span class="number">0.0</span>;
        <span class="kw">for</span> <span class="ident">pt</span> <span class="kw">in</span> <span class="ident">pts</span> {
            <span class="ident">x</span> <span class="op">+</span><span class="op">=</span> <span class="ident">pt</span>.<span class="ident">x</span>();
            <span class="ident">y</span> <span class="op">+</span><span class="op">=</span> <span class="ident">pt</span>.<span class="ident">y</span>();
        }
        <span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">pts</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">f64</span>;
        <span class="ident">Pt2D::new</span>(<span class="ident">x</span> <span class="op">/</span> <span class="ident">len</span>, <span class="ident">y</span> <span class="op">/</span> <span class="ident">len</span>)
    }

    <span class="comment">// Temporary until Pt2D has proper resolution.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">approx_dedupe</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="ident">threshold</span>: <span class="ident">Distance</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="comment">// Just use dedup() on the Vec.</span>
        <span class="macro">assert_ne!</span>(<span class="ident">threshold</span>, <span class="ident">EPSILON_DIST</span>);
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">result</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="ident">Vec::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">if</span> <span class="ident">result</span>.<span class="ident">is_empty</span>() <span class="op">|</span><span class="op">|</span> <span class="op">!</span><span class="ident">result</span>.<span class="ident">last</span>().<span class="ident">unwrap</span>().<span class="ident">approx_eq</span>(<span class="ident">pt</span>, <span class="ident">threshold</span>) {
                <span class="ident">result</span>.<span class="ident">push</span>(<span class="ident">pt</span>);
            }
        }
        <span class="ident">result</span>
    }

    <span class="comment">// TODO Try to deprecate in favor of Ring::get_shorter_slice_btwn</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">find_pts_between</span>(
        <span class="ident">pts</span>: <span class="kw-2">&amp;</span>[<span class="ident">Pt2D</span>],
        <span class="ident">start</span>: <span class="ident">Pt2D</span>,
        <span class="ident">end</span>: <span class="ident">Pt2D</span>,
        <span class="ident">threshold</span>: <span class="ident">Distance</span>,
    ) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">Pt2D</span><span class="op">&gt;</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">Vec::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">if</span> (<span class="ident">result</span>.<span class="ident">is_empty</span>() <span class="op">&amp;&amp;</span> <span class="ident">pt</span>.<span class="ident">approx_eq</span>(<span class="ident">start</span>, <span class="ident">threshold</span>)) <span class="op">|</span><span class="op">|</span> (<span class="op">!</span><span class="ident">result</span>.<span class="ident">is_empty</span>()) {
                <span class="ident">result</span>.<span class="ident">push</span>(<span class="kw-2">*</span><span class="ident">pt</span>);
            }
            <span class="comment">// start and end might be the same.</span>
            <span class="kw">if</span> <span class="op">!</span><span class="ident">result</span>.<span class="ident">is_empty</span>() <span class="op">&amp;&amp;</span> <span class="ident">pt</span>.<span class="ident">approx_eq</span>(<span class="ident">end</span>, <span class="ident">threshold</span>) {
                <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">result</span>);
            }
        }

        <span class="comment">// start wasn&#39;t in the list!</span>
        <span class="kw">if</span> <span class="ident">result</span>.<span class="ident">is_empty</span>() {
            <span class="kw">return</span> <span class="prelude-val">None</span>;
        }

        <span class="comment">// Go through again, looking for end</span>
        <span class="kw">for</span> <span class="ident">pt</span> <span class="kw">in</span> <span class="ident">pts</span> {
            <span class="ident">result</span>.<span class="ident">push</span>(<span class="kw-2">*</span><span class="ident">pt</span>);
            <span class="kw">if</span> <span class="ident">pt</span>.<span class="ident">approx_eq</span>(<span class="ident">end</span>, <span class="ident">threshold</span>) {
                <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">result</span>);
            }
        }
        <span class="comment">// Didn&#39;t find end</span>
        <span class="prelude-val">None</span>
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_hashable</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">HashablePt2D</span> {
        <span class="ident">HashablePt2D</span> {
            <span class="ident">x_nan</span>: <span class="ident">NotNan::new</span>(<span class="self">self</span>.<span class="ident">x</span>()).<span class="ident">unwrap</span>(),
            <span class="ident">y_nan</span>: <span class="ident">NotNan::new</span>(<span class="self">self</span>.<span class="ident">y</span>()).<span class="ident">unwrap</span>(),
        }
    }
}

<span class="kw">impl</span> <span class="ident">fmt::Display</span> <span class="kw">for</span> <span class="ident">Pt2D</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::Formatter</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">fmt::Result</span> {
        <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;Pt2D({0}, {1})&quot;</span>, <span class="self">self</span>.<span class="ident">x</span>(), <span class="self">self</span>.<span class="ident">y</span>())
    }
}

<span class="doccomment">/// This represents world space, NOT LonLat.</span>
<span class="comment">// TODO So rename it HashablePair or something</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Copy</span>, <span class="ident">Debug</span>, <span class="ident">Eq</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">HashablePt2D</span> {
    <span class="ident">x_nan</span>: <span class="ident">NotNan</span><span class="op">&lt;</span><span class="ident">f64</span><span class="op">&gt;</span>,
    <span class="ident">y_nan</span>: <span class="ident">NotNan</span><span class="op">&lt;</span><span class="ident">f64</span><span class="op">&gt;</span>,
}

<span class="kw">impl</span> <span class="ident">HashablePt2D</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_pt2d</span>(<span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Pt2D</span> {
        <span class="ident">Pt2D::new</span>(<span class="self">self</span>.<span class="ident">x_nan</span>.<span class="ident">into_inner</span>(), <span class="self">self</span>.<span class="ident">y_nan</span>.<span class="ident">into_inner</span>())
    }
}

<span class="kw">impl</span> <span class="ident">From</span><span class="op">&lt;</span><span class="ident">Pt2D</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">geo::Coordinate</span><span class="op">&lt;</span><span class="ident">f64</span><span class="op">&gt;</span> {
    <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">pt</span>: <span class="ident">Pt2D</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="self">Self</span> {
        <span class="ident">geo::Coordinate</span> { <span class="ident">x</span>: <span class="ident">pt</span>.<span class="ident">x</span>, <span class="ident">y</span>: <span class="ident">pt</span>.<span class="ident">y</span> }
    }
}

<span class="kw">impl</span> <span class="ident">From</span><span class="op">&lt;</span><span class="ident">Pt2D</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">geo::Point</span><span class="op">&lt;</span><span class="ident">f64</span><span class="op">&gt;</span> {
    <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">pt</span>: <span class="ident">Pt2D</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="self">Self</span> {
        <span class="ident">geo::Point::new</span>(<span class="ident">pt</span>.<span class="ident">x</span>, <span class="ident">pt</span>.<span class="ident">y</span>)
    }
}

<span class="kw">impl</span> <span class="ident">From</span><span class="op">&lt;</span><span class="ident">geo::Coordinate</span><span class="op">&lt;</span><span class="ident">f64</span><span class="op">&gt;</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">Pt2D</span> {
    <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">coord</span>: <span class="ident">geo::Coordinate</span><span class="op">&lt;</span><span class="ident">f64</span><span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="self">Self</span> {
        <span class="ident">Pt2D::new</span>(<span class="ident">coord</span>.<span class="ident">x</span>, <span class="ident">coord</span>.<span class="ident">y</span>)
    }
}

<span class="kw">impl</span> <span class="ident">From</span><span class="op">&lt;</span><span class="ident">geo::Point</span><span class="op">&lt;</span><span class="ident">f64</span><span class="op">&gt;</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">Pt2D</span> {
    <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">point</span>: <span class="ident">geo::Point</span><span class="op">&lt;</span><span class="ident">f64</span><span class="op">&gt;</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="self">Self</span> {
        <span class="ident">Pt2D::new</span>(<span class="ident">point</span>.<span class="ident">x</span>(), <span class="ident">point</span>.<span class="ident">y</span>())
    }
}
</pre></div>
</section><section id="search" class="content hidden"></section><div id="rustdoc-vars" data-root-path="../../" data-current-crate="geom" data-search-index-js="../../search-index.js" data-search-js="../../search.js"></div>
    <script src="../../main.js"></script><script src="../../source-script.js"></script><script src="../../source-files.js"></script></body></html>