<!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 `widgetry/src/tools/warper.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>warper.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="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"><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">☰</div><a href='../../../widgetry/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" title="themes"><img width="18" height="18" alt="Pick another theme!" src="../../../brush.svg"></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" id="help-button" title="help">?</button><a id="settings-menu" href="../../../settings.html" title="settings"><img width="18" height="18" alt="Change settings" src="../../../wheel.svg"></a></div></form></nav><section id="main" 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> </pre><pre class="rust"><code><span class="kw">use</span> <span class="ident">instant::Instant</span>; <span class="kw">use</span> <span class="ident">geom</span>::{<span class="ident">Line</span>, <span class="ident">Pt2D</span>}; <span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">EventCtx</span>, <span class="ident">UpdateType</span>}; <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Warper</span> { <span class="ident">started</span>: <span class="ident">Instant</span>, <span class="ident">line</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Line</span><span class="op">></span>, <span class="ident">cam_zoom</span>: (<span class="ident">f64</span>, <span class="ident">f64</span>), } <span class="kw">impl</span> <span class="ident">Warper</span> { <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">ctx</span>: <span class="kw-2">&</span><span class="ident">EventCtx</span>, <span class="ident">pt</span>: <span class="ident">Pt2D</span>, <span class="ident">target_cam_zoom</span>: <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span>) <span class="op">-</span><span class="op">></span> <span class="ident">Warper</span> { <span class="kw">let</span> <span class="ident">z</span> <span class="op">=</span> <span class="ident">ctx</span>.<span class="ident">canvas</span>.<span class="ident">cam_zoom</span>; <span class="ident">Warper</span> { <span class="ident">started</span>: <span class="ident">Instant::now</span>(), <span class="ident">line</span>: <span class="ident">Line::new</span>(<span class="ident">ctx</span>.<span class="ident">canvas</span>.<span class="ident">center_to_map_pt</span>(), <span class="ident">pt</span>), <span class="ident">cam_zoom</span>: (<span class="ident">z</span>, <span class="ident">target_cam_zoom</span>.<span class="ident">unwrap_or</span>(<span class="ident">z</span>)), } } <span class="comment">// false means done</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">event</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">ctx</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">EventCtx</span>) <span class="op">-</span><span class="op">></span> <span class="ident">bool</span> { <span class="comment">// Actually nothing for us to do</span> <span class="attribute">#[<span class="ident">allow</span>(<span class="ident">clippy::float_cmp</span>)]</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">line</span>.<span class="ident">is_none</span>() <span class="op">&&</span> <span class="self">self</span>.<span class="ident">cam_zoom</span>.<span class="number">0</span> <span class="op">=</span><span class="op">=</span> <span class="self">self</span>.<span class="ident">cam_zoom</span>.<span class="number">1</span> { <span class="kw">return</span> <span class="bool-val">false</span>; } <span class="comment">// Weird to do stuff for any event?</span> <span class="kw">if</span> <span class="ident">ctx</span>.<span class="ident">input</span>.<span class="ident">nonblocking_is_update_event</span>().<span class="ident">is_none</span>() { <span class="ident">ctx</span>.<span class="ident">request_update</span>(<span class="ident">UpdateType::Game</span>); <span class="kw">return</span> <span class="bool-val">true</span>; } <span class="ident">ctx</span>.<span class="ident">input</span>.<span class="ident">use_update_event</span>(); <span class="kw">const</span> <span class="ident">MAX_ANIMATION_TIME_S</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="number">0.5</span>; <span class="kw">const</span> <span class="ident">ANIMATION_SPEED</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="number">200.0</span>; <span class="kw">let</span> <span class="ident">total_time</span> <span class="op">=</span> <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">line</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">line</span> { (<span class="ident">line</span>.<span class="ident">length</span>().<span class="ident">inner_meters</span>() <span class="op">/</span> <span class="ident">ANIMATION_SPEED</span>).<span class="ident">min</span>(<span class="ident">MAX_ANIMATION_TIME_S</span>) } <span class="kw">else</span> { <span class="ident">MAX_ANIMATION_TIME_S</span> }; <span class="kw">let</span> <span class="ident">percent</span> <span class="op">=</span> <span class="ident">abstutil::elapsed_seconds</span>(<span class="self">self</span>.<span class="ident">started</span>) <span class="op">/</span> <span class="ident">total_time</span>; <span class="kw">let</span> <span class="ident">orig_center</span> <span class="op">=</span> <span class="ident">ctx</span>.<span class="ident">canvas</span>.<span class="ident">center_to_map_pt</span>(); <span class="kw">if</span> <span class="ident">percent</span> <span class="op">></span><span class="op">=</span> <span class="number">1.0</span> <span class="op">|</span><span class="op">|</span> <span class="ident">ctx</span>.<span class="ident">input</span>.<span class="ident">any_pressed</span>().<span class="ident">is_some</span>() { <span class="ident">ctx</span>.<span class="ident">canvas</span>.<span class="ident">cam_zoom</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">cam_zoom</span>.<span class="number">1</span>; <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">line</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">line</span> { <span class="ident">ctx</span>.<span class="ident">canvas</span>.<span class="ident">center_on_map_pt</span>(<span class="ident">line</span>.<span class="ident">pt2</span>()); } <span class="kw">else</span> { <span class="ident">ctx</span>.<span class="ident">canvas</span>.<span class="ident">center_on_map_pt</span>(<span class="ident">orig_center</span>); } <span class="bool-val">false</span> } <span class="kw">else</span> { <span class="ident">ctx</span>.<span class="ident">canvas</span>.<span class="ident">cam_zoom</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">cam_zoom</span>.<span class="number">0</span> <span class="op">+</span> <span class="ident">percent</span> <span class="op">*</span> (<span class="self">self</span>.<span class="ident">cam_zoom</span>.<span class="number">1</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">cam_zoom</span>.<span class="number">0</span>); <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="kw-2">ref</span> <span class="ident">line</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">line</span> { <span class="ident">ctx</span>.<span class="ident">canvas</span> .<span class="ident">center_on_map_pt</span>(<span class="ident">line</span>.<span class="ident">percent_along</span>(<span class="ident">percent</span>).<span class="ident">unwrap</span>()); } <span class="kw">else</span> { <span class="ident">ctx</span>.<span class="ident">canvas</span>.<span class="ident">center_on_map_pt</span>(<span class="ident">orig_center</span>); } <span class="ident">ctx</span>.<span class="ident">request_update</span>(<span class="ident">UpdateType::Game</span>); <span class="bool-val">true</span> } } } </code></pre></div> </section><section id="search" class="content hidden"></section><div id="rustdoc-vars" data-root-path="../../../" data-current-crate="widgetry" 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>