<!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/distance.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>distance.rs - source</title><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Regular.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../FiraSans-Medium.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Regular.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceSerif4-Bold.ttf.woff2"><link rel="preload" as="font" type="font/woff2" crossorigin href="../../SourceCodePro-Semibold.ttf.woff2"><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="../../ayu.css" disabled><link rel="stylesheet" type="text/css" href="../../dark.css" disabled><link rel="stylesheet" type="text/css" href="../../light.css" id="themeStyle"><script id="default-settings" ></script><script src="../../storage.js"></script><script src="../../crates.js"></script><script defer src="../../main.js"></script><script defer src="../../source-script.js"></script><script defer src="../../source-files.js"></script>
    <noscript><link rel="stylesheet" href="../../noscript.css"></noscript><link rel="alternate icon" type="image/png" href="../../favicon-16x16.png"><link rel="alternate icon" type="image/png" href="../../favicon-32x32.png"><link rel="icon" type="image/svg+xml" href="../../favicon.svg"></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="mobile-topbar"><button class="sidebar-menu-toggle">&#9776;</button><a class="sidebar-logo" href="../../geom/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div>
        </a><h2 class="location"></h2>
    </nav>
    <nav class="sidebar"><a class="sidebar-logo" href="../../geom/index.html"><div class="logo-container"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></div>
        </a></nav><main><div class="width-limiter"><div class="sub-container"><a class="sub-logo-container" href="../../geom/index.html"><img class="rust-logo" src="../../rust-logo.svg" alt="logo"></a><nav class="sub"><div class="theme-picker hidden"><button id="theme-picker" aria-label="Pick another theme!" aria-haspopup="menu" title="themes"><img width="22" height="22" alt="Pick another theme!" src="../../brush.svg"></button><div id="theme-choices" role="menu"></div></div><form class="search-form"><div class="search-container"><span></span><input class="search-input" name="search" autocomplete="off" spellcheck="false" placeholder="Click or press ‘S’ to search, ‘?’ for more options…" type="search"><button type="button" id="help-button" title="help">?</button><a id="settings-menu" href="../../settings.html" title="settings"><img width="22" height="22" alt="Change settings" src="../../wheel.svg"></a></div></form></nav></div><section id="main-content" class="content"><div class="example-wrap"><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>
<span id="215">215</span>
<span id="216">216</span>
<span id="217">217</span>
<span id="218">218</span>
<span id="219">219</span>
<span id="220">220</span>
<span id="221">221</span>
<span id="222">222</span>
<span id="223">223</span>
<span id="224">224</span>
<span id="225">225</span>
<span id="226">226</span>
<span id="227">227</span>
<span id="228">228</span>
<span id="229">229</span>
<span id="230">230</span>
<span id="231">231</span>
<span id="232">232</span>
<span id="233">233</span>
<span id="234">234</span>
<span id="235">235</span>
<span id="236">236</span>
<span id="237">237</span>
<span id="238">238</span>
<span id="239">239</span>
<span id="240">240</span>
<span id="241">241</span>
<span id="242">242</span>
<span id="243">243</span>
<span id="244">244</span>
<span id="245">245</span>
<span id="246">246</span>
<span id="247">247</span>
<span id="248">248</span>
<span id="249">249</span>
<span id="250">250</span>
<span id="251">251</span>
<span id="252">252</span>
<span id="253">253</span>
<span id="254">254</span>
<span id="255">255</span>
<span id="256">256</span>
<span id="257">257</span>
<span id="258">258</span>
<span id="259">259</span>
<span id="260">260</span>
<span id="261">261</span>
<span id="262">262</span>
<span id="263">263</span>
<span id="264">264</span>
<span id="265">265</span>
<span id="266">266</span>
<span id="267">267</span>
<span id="268">268</span>
<span id="269">269</span>
<span id="270">270</span>
<span id="271">271</span>
<span id="272">272</span>
<span id="273">273</span>
<span id="274">274</span>
<span id="275">275</span>
<span id="276">276</span>
<span id="277">277</span>
<span id="278">278</span>
<span id="279">279</span>
<span id="280">280</span>
<span id="281">281</span>
<span id="282">282</span>
<span id="283">283</span>
<span id="284">284</span>
<span id="285">285</span>
<span id="286">286</span>
<span id="287">287</span>
<span id="288">288</span>
<span id="289">289</span>
<span id="290">290</span>
<span id="291">291</span>
<span id="292">292</span>
<span id="293">293</span>
<span id="294">294</span>
<span id="295">295</span>
<span id="296">296</span>
<span id="297">297</span>
<span id="298">298</span>
<span id="299">299</span>
<span id="300">300</span>
<span id="301">301</span>
<span id="302">302</span>
<span id="303">303</span>
<span id="304">304</span>
<span id="305">305</span>
<span id="306">306</span>
<span id="307">307</span>
<span id="308">308</span>
<span id="309">309</span>
</pre><pre class="rust"><code><span class="kw">use</span> <span class="ident">std</span>::{<span class="ident">cmp</span>, <span class="ident">f64</span>, <span class="ident">fmt</span>, <span class="ident">ops</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">Duration</span>, <span class="ident">Speed</span>, <span class="ident">UnitFmt</span>, <span class="ident">EPSILON_DIST</span>};

<span class="doccomment">/// A distance, in meters. Can be negative.</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">PartialEq</span>, <span class="ident">PartialOrd</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">Distance</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">f64</span>,
);

<span class="comment">// By construction, Distance is a finite f64 with trimmed precision.</span>
<span class="kw">impl</span> <span class="ident">Eq</span> <span class="kw">for</span> <span class="ident">Distance</span> {}

<span class="attribute">#[<span class="ident">allow</span>(<span class="ident">clippy::derive_ord_xor_partial_ord</span>)]</span> <span class="comment">// false positive</span>
<span class="kw">impl</span> <span class="ident">Ord</span> <span class="kw">for</span> <span class="ident">Distance</span> {
    <span class="kw">fn</span> <span class="ident">cmp</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">Distance</span>) -&gt; <span class="ident">cmp::Ordering</span> {
        <span class="self">self</span>.<span class="ident">partial_cmp</span>(<span class="ident">other</span>).<span class="ident">unwrap</span>()
    }
}

<span class="kw">impl</span> <span class="ident">Distance</span> {
    <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">ZERO</span>: <span class="ident">Distance</span> <span class="op">=</span> <span class="ident">Distance::const_meters</span>(<span class="number">0.0</span>);

    <span class="doccomment">/// Creates a distance in meters.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">meters</span>(<span class="ident">value</span>: <span class="ident">f64</span>) -&gt; <span class="ident">Distance</span> {
        <span class="kw">if</span> <span class="op">!</span><span class="ident">value</span>.<span class="ident">is_finite</span>() {
            <span class="macro">panic!</span>(<span class="string">&quot;Bad Distance {}&quot;</span>, <span class="ident">value</span>);
        }

        <span class="ident">Distance</span>(<span class="ident">trim_f64</span>(<span class="ident">value</span>))
    }

    <span class="comment">// TODO Can&#39;t panic inside a const fn, seemingly. Don&#39;t pass in anything bad!</span>
    <span class="kw">pub</span> <span class="kw">const</span> <span class="kw">fn</span> <span class="ident">const_meters</span>(<span class="ident">value</span>: <span class="ident">f64</span>) -&gt; <span class="ident">Distance</span> {
        <span class="ident">Distance</span>(<span class="ident">value</span>)
    }

    <span class="doccomment">/// Creates a distance in inches.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">inches</span>(<span class="ident">value</span>: <span class="ident">f64</span>) -&gt; <span class="ident">Distance</span> {
        <span class="ident">Distance::meters</span>(<span class="number">0.0254</span> <span class="op">*</span> <span class="ident">value</span>)
    }

    <span class="doccomment">/// Creates a distance in miles.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">miles</span>(<span class="ident">value</span>: <span class="ident">f64</span>) -&gt; <span class="ident">Distance</span> {
        <span class="ident">Distance::meters</span>(<span class="number">1609.34</span> <span class="op">*</span> <span class="ident">value</span>)
    }

    <span class="doccomment">/// Creates a distance in centimeters.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">centimeters</span>(<span class="ident">value</span>: <span class="ident">usize</span>) -&gt; <span class="ident">Distance</span> {
        <span class="ident">Distance::meters</span>((<span class="ident">value</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">/</span> <span class="number">100.0</span>)
    }

    <span class="doccomment">/// Creates a distance in feet.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">feet</span>(<span class="ident">value</span>: <span class="ident">f64</span>) -&gt; <span class="ident">Distance</span> {
        <span class="ident">Distance::meters</span>(<span class="ident">value</span> <span class="op">*</span> <span class="number">0.3048</span>)
    }

    <span class="doccomment">/// Returns the absolute value of this distance.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">abs</span>(<span class="self">self</span>) -&gt; <span class="ident">Distance</span> {
        <span class="kw">if</span> <span class="self">self</span>.<span class="number">0</span> <span class="op">&gt;</span> <span class="number">0.0</span> {
            <span class="self">self</span>
        } <span class="kw">else</span> {
            <span class="ident">Distance</span>(<span class="op">-</span><span class="self">self</span>.<span class="number">0</span>)
        }
    }

    <span class="doccomment">/// Returns the square root of this distance.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">sqrt</span>(<span class="self">self</span>) -&gt; <span class="ident">Distance</span> {
        <span class="ident">Distance::meters</span>(<span class="self">self</span>.<span class="number">0</span>.<span class="ident">sqrt</span>())
    }

    <span class="doccomment">/// Returns the distance in meters. Prefer to work with type-safe `Distance`s.</span>
    <span class="comment">// TODO Remove if possible.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">inner_meters</span>(<span class="self">self</span>) -&gt; <span class="ident">f64</span> {
        <span class="self">self</span>.<span class="number">0</span>
    }

    <span class="doccomment">/// Returns the distance in feet.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_feet</span>(<span class="self">self</span>) -&gt; <span class="ident">f64</span> {
        <span class="self">self</span>.<span class="number">0</span> <span class="op">*</span> <span class="number">3.28084</span>
    }

    <span class="doccomment">/// Returns the distance in miles.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_miles</span>(<span class="self">self</span>) -&gt; <span class="ident">f64</span> {
        <span class="self">self</span>.<span class="ident">to_feet</span>() <span class="op">/</span> <span class="number">5280.0</span>
    }

    <span class="doccomment">/// Describes the distance according to formatting rules. Rounds to 1 decimal place for both</span>
    <span class="doccomment">/// small (feet and meters) and large (miles and kilometers) units.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_string</span>(<span class="self">self</span>, <span class="ident">fmt</span>: <span class="kw-2">&amp;</span><span class="ident">UnitFmt</span>) -&gt; <span class="ident">String</span> {
        <span class="kw">if</span> <span class="ident">fmt</span>.<span class="ident">metric</span> {
            <span class="kw">if</span> <span class="self">self</span>.<span class="number">0</span> <span class="op">&lt;</span> <span class="number">1000.0</span> {
                <span class="macro">format!</span>(<span class="string">&quot;{}m&quot;</span>, (<span class="self">self</span>.<span class="number">0</span> <span class="op">*</span> <span class="number">10.0</span>).<span class="ident">round</span>() <span class="op">/</span> <span class="number">10.0</span>)
            } <span class="kw">else</span> {
                <span class="kw">let</span> <span class="ident">km</span> <span class="op">=</span> <span class="self">self</span>.<span class="number">0</span> <span class="op">/</span> <span class="number">1000.0</span>;
                <span class="macro">format!</span>(<span class="string">&quot;{}km&quot;</span>, (<span class="ident">km</span> <span class="op">*</span> <span class="number">10.0</span>).<span class="ident">round</span>() <span class="op">/</span> <span class="number">10.0</span>)
            }
        } <span class="kw">else</span> {
            <span class="kw">let</span> <span class="ident">feet</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">to_feet</span>();
            <span class="kw">let</span> <span class="ident">miles</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">to_miles</span>();
            <span class="kw">if</span> <span class="ident">miles</span> <span class="op">&gt;</span><span class="op">=</span> <span class="number">0.1</span> {
                <span class="macro">format!</span>(<span class="string">&quot;{} miles&quot;</span>, (<span class="ident">miles</span> <span class="op">*</span> <span class="number">10.0</span>).<span class="ident">round</span>() <span class="op">/</span> <span class="number">10.0</span>)
            } <span class="kw">else</span> {
                <span class="macro">format!</span>(<span class="string">&quot;{} ft&quot;</span>, (<span class="ident">feet</span> <span class="op">*</span> <span class="number">10.0</span>).<span class="ident">round</span>() <span class="op">/</span> <span class="number">10.0</span>)
            }
        }
    }

    <span class="doccomment">/// Calculates a percentage, usually in [0.0, 1.0], of self / other. If the denominator is</span>
    <span class="doccomment">/// zero, returns 0%.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">safe_percent</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Distance</span>) -&gt; <span class="ident">f64</span> {
        <span class="kw">if</span> <span class="ident">other</span> <span class="op">==</span> <span class="ident">Distance::ZERO</span> {
            <span class="kw">return</span> <span class="number">0.0</span>;
        }
        <span class="self">self</span> <span class="op">/</span> <span class="ident">other</span>
    }

    <span class="doccomment">/// Rounds this distance up to a higher, more &quot;even&quot; value to use for buckets along a plot&#39;s</span>
    <span class="doccomment">/// axis. Always rounds for imperial units (feet).</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">round_up_for_axis</span>(<span class="self">self</span>) -&gt; <span class="ident">Distance</span> {
        <span class="kw">let</span> <span class="ident">ft</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">to_feet</span>();
        <span class="kw">let</span> <span class="ident">miles</span> <span class="op">=</span> <span class="ident">ft</span> <span class="op">/</span> <span class="number">5280.0</span>;
        <span class="kw">if</span> <span class="ident">ft</span> <span class="op">&lt;</span><span class="op">=</span> <span class="number">0.0</span> {
            <span class="ident">Distance::ZERO</span>
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">ft</span> <span class="op">&lt;</span><span class="op">=</span> <span class="number">10.0</span> {
            <span class="ident">Distance::feet</span>(<span class="ident">ft</span>.<span class="ident">ceil</span>())
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">ft</span> <span class="op">&lt;</span><span class="op">=</span> <span class="number">100.0</span> {
            <span class="ident">Distance::feet</span>(<span class="number">10.0</span> <span class="op">*</span> (<span class="ident">ft</span> <span class="op">/</span> <span class="number">10.0</span>).<span class="ident">ceil</span>())
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">miles</span> <span class="op">&lt;</span> <span class="number">0.1</span> {
            <span class="ident">Distance::feet</span>(<span class="number">100.0</span> <span class="op">*</span> (<span class="ident">ft</span> <span class="op">/</span> <span class="number">100.0</span>).<span class="ident">ceil</span>())
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">miles</span> <span class="op">&lt;</span><span class="op">=</span> <span class="number">1.0</span> {
            <span class="ident">Distance::miles</span>((<span class="ident">miles</span> <span class="op">*</span> <span class="number">10.0</span>).<span class="ident">ceil</span>() <span class="op">/</span> <span class="number">10.0</span>)
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">miles</span> <span class="op">&lt;</span><span class="op">=</span> <span class="number">10.0</span> {
            <span class="ident">Distance::miles</span>(<span class="ident">miles</span>.<span class="ident">ceil</span>())
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">miles</span> <span class="op">&lt;</span><span class="op">=</span> <span class="number">100.0</span> {
            <span class="ident">Distance::miles</span>(<span class="number">10.0</span> <span class="op">*</span> (<span class="ident">miles</span> <span class="op">/</span> <span class="number">10.0</span>).<span class="ident">ceil</span>())
        } <span class="kw">else</span> {
            <span class="self">self</span>
        }
    }

    <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">to_u64</span>(<span class="self">self</span>) -&gt; <span class="ident">u64</span> {
        (<span class="self">self</span>.<span class="number">0</span> <span class="op">/</span> <span class="ident">EPSILON_DIST</span>.<span class="number">0</span>) <span class="kw">as</span> <span class="ident">u64</span>
    }

    <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">from_u64</span>(<span class="ident">x</span>: <span class="ident">u64</span>) -&gt; <span class="ident">Distance</span> {
        (<span class="ident">x</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">*</span> <span class="ident">EPSILON_DIST</span>
    }
}

<span class="kw">impl</span> <span class="ident">fmt::Display</span> <span class="kw">for</span> <span class="ident">Distance</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;mut</span> <span class="ident">fmt::Formatter</span>) -&gt; <span class="ident">fmt::Result</span> {
        <span class="macro">write!</span>(<span class="ident">f</span>, <span class="string">&quot;{}m&quot;</span>, <span class="self">self</span>.<span class="number">0</span>)
    }
}

<span class="kw">impl</span> <span class="ident">ops::Add</span> <span class="kw">for</span> <span class="ident">Distance</span> {
    <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Distance</span>;

    <span class="kw">fn</span> <span class="ident">add</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Distance</span>) -&gt; <span class="ident">Distance</span> {
        <span class="ident">Distance::meters</span>(<span class="self">self</span>.<span class="number">0</span> <span class="op">+</span> <span class="ident">other</span>.<span class="number">0</span>)
    }
}

<span class="kw">impl</span> <span class="ident">ops::AddAssign</span> <span class="kw">for</span> <span class="ident">Distance</span> {
    <span class="kw">fn</span> <span class="ident">add_assign</span>(<span class="kw-2">&amp;mut</span> <span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Distance</span>) {
        <span class="kw-2">*</span><span class="self">self</span> <span class="op">=</span> <span class="kw-2">*</span><span class="self">self</span> <span class="op">+</span> <span class="ident">other</span>;
    }
}

<span class="kw">impl</span> <span class="ident">ops::Sub</span> <span class="kw">for</span> <span class="ident">Distance</span> {
    <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Distance</span>;

    <span class="kw">fn</span> <span class="ident">sub</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Distance</span>) -&gt; <span class="ident">Distance</span> {
        <span class="ident">Distance::meters</span>(<span class="self">self</span>.<span class="number">0</span> <span class="op">-</span> <span class="ident">other</span>.<span class="number">0</span>)
    }
}

<span class="kw">impl</span> <span class="ident">ops::Neg</span> <span class="kw">for</span> <span class="ident">Distance</span> {
    <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Distance</span>;

    <span class="kw">fn</span> <span class="ident">neg</span>(<span class="self">self</span>) -&gt; <span class="ident">Distance</span> {
        <span class="ident">Distance::meters</span>(<span class="op">-</span><span class="self">self</span>.<span class="number">0</span>)
    }
}

<span class="kw">impl</span> <span class="ident">ops::SubAssign</span> <span class="kw">for</span> <span class="ident">Distance</span> {
    <span class="kw">fn</span> <span class="ident">sub_assign</span>(<span class="kw-2">&amp;mut</span> <span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Distance</span>) {
        <span class="kw-2">*</span><span class="self">self</span> <span class="op">=</span> <span class="kw-2">*</span><span class="self">self</span> <span class="op">-</span> <span class="ident">other</span>;
    }
}

<span class="kw">impl</span> <span class="ident">ops::Mul</span><span class="op">&lt;</span><span class="ident">f64</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">Distance</span> {
    <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Distance</span>;

    <span class="kw">fn</span> <span class="ident">mul</span>(<span class="self">self</span>, <span class="ident">scalar</span>: <span class="ident">f64</span>) -&gt; <span class="ident">Distance</span> {
        <span class="ident">Distance::meters</span>(<span class="self">self</span>.<span class="number">0</span> <span class="op">*</span> <span class="ident">scalar</span>)
    }
}

<span class="kw">impl</span> <span class="ident">ops::Mul</span><span class="op">&lt;</span><span class="ident">Distance</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">f64</span> {
    <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Distance</span>;

    <span class="kw">fn</span> <span class="ident">mul</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Distance</span>) -&gt; <span class="ident">Distance</span> {
        <span class="ident">Distance::meters</span>(<span class="self">self</span> <span class="op">*</span> <span class="ident">other</span>.<span class="number">0</span>)
    }
}

<span class="kw">impl</span> <span class="ident">ops::MulAssign</span><span class="op">&lt;</span><span class="ident">f64</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">Distance</span> {
    <span class="kw">fn</span> <span class="ident">mul_assign</span>(<span class="kw-2">&amp;mut</span> <span class="self">self</span>, <span class="ident">other</span>: <span class="ident">f64</span>) {
        <span class="kw-2">*</span><span class="self">self</span> <span class="op">=</span> <span class="kw-2">*</span><span class="self">self</span> <span class="op">*</span> <span class="ident">other</span>;
    }
}

<span class="kw">impl</span> <span class="ident">ops::Div</span><span class="op">&lt;</span><span class="ident">Distance</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">Distance</span> {
    <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">f64</span>;

    <span class="kw">fn</span> <span class="ident">div</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Distance</span>) -&gt; <span class="ident">f64</span> {
        <span class="kw">if</span> <span class="ident">other</span> <span class="op">==</span> <span class="ident">Distance::ZERO</span> {
            <span class="macro">panic!</span>(<span class="string">&quot;Can&#39;t divide {} / {}&quot;</span>, <span class="self">self</span>, <span class="ident">other</span>);
        }
        <span class="self">self</span>.<span class="number">0</span> <span class="op">/</span> <span class="ident">other</span>.<span class="number">0</span>
    }
}

<span class="kw">impl</span> <span class="ident">ops::Div</span><span class="op">&lt;</span><span class="ident">f64</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">Distance</span> {
    <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Distance</span>;

    <span class="kw">fn</span> <span class="ident">div</span>(<span class="self">self</span>, <span class="ident">scalar</span>: <span class="ident">f64</span>) -&gt; <span class="ident">Distance</span> {
        <span class="kw">if</span> <span class="ident">scalar</span> <span class="op">==</span> <span class="number">0.0</span> {
            <span class="macro">panic!</span>(<span class="string">&quot;Can&#39;t divide {} / {}&quot;</span>, <span class="self">self</span>, <span class="ident">scalar</span>);
        }
        <span class="ident">Distance::meters</span>(<span class="self">self</span>.<span class="number">0</span> <span class="op">/</span> <span class="ident">scalar</span>)
    }
}

<span class="kw">impl</span> <span class="ident">ops::Div</span><span class="op">&lt;</span><span class="ident">Speed</span><span class="op">&gt;</span> <span class="kw">for</span> <span class="ident">Distance</span> {
    <span class="kw">type</span> <span class="ident">Output</span> <span class="op">=</span> <span class="ident">Duration</span>;

    <span class="kw">fn</span> <span class="ident">div</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Speed</span>) -&gt; <span class="ident">Duration</span> {
        <span class="kw">if</span> <span class="ident">other</span> <span class="op">==</span> <span class="ident">Speed::ZERO</span> {
            <span class="macro">panic!</span>(<span class="string">&quot;Can&#39;t divide {} / 0 mph&quot;</span>, <span class="self">self</span>);
        }
        <span class="ident">Duration::seconds</span>(<span class="self">self</span>.<span class="number">0</span> <span class="op">/</span> <span class="ident">other</span>.<span class="ident">inner_meters_per_second</span>())
    }
}

<span class="kw">impl</span> <span class="ident">std::iter::Sum</span> <span class="kw">for</span> <span class="ident">Distance</span> {
    <span class="kw">fn</span> <span class="ident">sum</span><span class="op">&lt;</span><span class="ident">I</span><span class="op">&gt;</span>(<span class="ident">iter</span>: <span class="ident">I</span>) -&gt; <span class="ident">Distance</span>
    <span class="kw">where</span>
        <span class="ident">I</span>: <span class="ident">Iterator</span><span class="op">&lt;</span><span class="ident">Item</span> <span class="op">=</span> <span class="ident">Distance</span><span class="op">&gt;</span>,
    {
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">sum</span> <span class="op">=</span> <span class="ident">Distance::ZERO</span>;
        <span class="kw">for</span> <span class="ident">x</span> <span class="kw">in</span> <span class="ident">iter</span> {
            <span class="ident">sum</span> <span class="op">+</span><span class="op">=</span> <span class="ident">x</span>;
        }
        <span class="ident">sum</span>
    }
}

<span class="kw">impl</span> <span class="ident">Default</span> <span class="kw">for</span> <span class="ident">Distance</span> {
    <span class="kw">fn</span> <span class="ident">default</span>() -&gt; <span class="ident">Distance</span> {
        <span class="ident">Distance::ZERO</span>
    }
}

<span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span>
<span class="kw">mod</span> <span class="ident">tests</span> {
    <span class="kw">use</span> <span class="kw">super</span>::<span class="kw-2">*</span>;

    <span class="attribute">#[<span class="ident">test</span>]</span>
    <span class="kw">fn</span> <span class="ident">round_up_for_axis</span>() {
        <span class="kw">let</span> <span class="ident">fmt</span> <span class="op">=</span> <span class="ident">UnitFmt</span> {
            <span class="ident">metric</span>: <span class="bool-val">false</span>,
            <span class="ident">round_durations</span>: <span class="bool-val">false</span>,
        };

        <span class="kw">for</span> (<span class="ident">input</span>, <span class="ident">expected</span>) <span class="kw">in</span> [
            (<span class="op">-</span><span class="number">3.0</span>, <span class="number">0.0</span>),
            (<span class="number">0.0</span>, <span class="number">0.0</span>),
            (<span class="number">3.2</span>, <span class="number">4.0</span>),
            (<span class="number">30.2</span>, <span class="number">40.0</span>),
            (<span class="number">300.2</span>, <span class="number">400.0</span>),
            (
                <span class="ident">Distance::miles</span>(<span class="number">0.13</span>).<span class="ident">to_feet</span>(),
                <span class="ident">Distance::miles</span>(<span class="number">0.2</span>).<span class="ident">to_feet</span>(),
            ),
            (
                <span class="ident">Distance::miles</span>(<span class="number">0.64</span>).<span class="ident">to_feet</span>(),
                <span class="ident">Distance::miles</span>(<span class="number">0.7</span>).<span class="ident">to_feet</span>(),
            ),
            (
                <span class="ident">Distance::miles</span>(<span class="number">2.6</span>).<span class="ident">to_feet</span>(),
                <span class="ident">Distance::miles</span>(<span class="number">3.0</span>).<span class="ident">to_feet</span>(),
            ),
            (
                <span class="ident">Distance::miles</span>(<span class="number">2.9</span>).<span class="ident">to_feet</span>(),
                <span class="ident">Distance::miles</span>(<span class="number">3.0</span>).<span class="ident">to_feet</span>(),
            ),
        ] {
            <span class="macro">assert_eq!</span>(
                <span class="ident">Distance::feet</span>(<span class="ident">input</span>).<span class="ident">round_up_for_axis</span>().<span class="ident">to_string</span>(<span class="kw-2">&amp;</span><span class="ident">fmt</span>),
                <span class="ident">Distance::feet</span>(<span class="ident">expected</span>).<span class="ident">to_string</span>(<span class="kw-2">&amp;</span><span class="ident">fmt</span>)
            );
        }
    }
}
</code></pre></div>
</section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="geom" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.62.1 (e092d0b6b 2022-07-16)" ></div>
</body></html>