<!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 `map_gui&#x2F;src&#x2F;tools&#x2F;compare_counts.rs`."><meta name="keywords" content="rust, rustlang, rust-lang"><title>compare_counts.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><script defer src="../../../main.js"></script><script defer src="../../../source-script.js"></script><script defer src="../../../source-files.js"></script>
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</pre><pre class="rust"><code><span class="kw">use</span> <span class="ident">abstutil::prettyprint_usize</span>;
<span class="kw">use</span> <span class="ident">geom</span>::{<span class="ident">Distance</span>, <span class="ident">Histogram</span>, <span class="ident">Statistic</span>};
<span class="kw">use</span> <span class="ident">map_model</span>::{<span class="ident">IntersectionID</span>, <span class="ident">RoadID</span>};
<span class="kw">use</span> <span class="ident">synthpop::TrafficCounts</span>;
<span class="kw">use</span> <span class="ident">widgetry::mapspace</span>::{<span class="ident">ObjectID</span>, <span class="ident">ToggleZoomed</span>, <span class="ident">ToggleZoomedBuilder</span>, <span class="ident">World</span>};
<span class="kw">use</span> <span class="ident">widgetry</span>::{<span class="ident">Color</span>, <span class="ident">EventCtx</span>, <span class="ident">GeomBatch</span>, <span class="ident">GfxCtx</span>, <span class="ident">Key</span>, <span class="ident">Line</span>, <span class="ident">Text</span>, <span class="ident">TextExt</span>, <span class="ident">Widget</span>};

<span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::tools</span>::{<span class="ident">cmp_count</span>, <span class="ident">ColorNetwork</span>, <span class="ident">DivergingScale</span>};
<span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::AppLike</span>;

<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">CompareCounts</span> {
    <span class="kw">pub</span> <span class="ident">layer</span>: <span class="ident">Layer</span>,
    <span class="ident">world</span>: <span class="ident">World</span><span class="op">&lt;</span><span class="ident">Obj</span><span class="op">&gt;</span>,
    <span class="kw">pub</span> <span class="ident">counts_a</span>: <span class="ident">TrafficCounts</span>,
    <span class="ident">heatmap_a</span>: <span class="ident">ToggleZoomed</span>,
    <span class="kw">pub</span> <span class="ident">counts_b</span>: <span class="ident">TrafficCounts</span>,
    <span class="ident">heatmap_b</span>: <span class="ident">ToggleZoomed</span>,
    <span class="ident">relative_heatmap</span>: <span class="ident">ToggleZoomed</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">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Hash</span>)]</span>
<span class="kw">enum</span> <span class="ident">Obj</span> {
    <span class="ident">Road</span>(<span class="ident">RoadID</span>),
    <span class="ident">Intersection</span>(<span class="ident">IntersectionID</span>),
}
<span class="kw">impl</span> <span class="ident">ObjectID</span> <span class="kw">for</span> <span class="ident">Obj</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>
<span class="kw">pub</span> <span class="kw">enum</span> <span class="ident">Layer</span> {
    <span class="ident">A</span>,
    <span class="ident">B</span>,
    <span class="ident">Compare</span>,
}

<span class="kw">impl</span> <span class="ident">CompareCounts</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">&amp;mut</span> <span class="ident">EventCtx</span>,
        <span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="kw">dyn</span> <span class="ident">AppLike</span>,
        <span class="ident">counts_a</span>: <span class="ident">TrafficCounts</span>,
        <span class="ident">counts_b</span>: <span class="ident">TrafficCounts</span>,
        <span class="ident">layer</span>: <span class="ident">Layer</span>,
    ) -&gt; <span class="ident">CompareCounts</span> {
        <span class="kw">let</span> <span class="ident">heatmap_a</span> <span class="op">=</span> <span class="ident">calculate_heatmap</span>(<span class="ident">ctx</span>, <span class="ident">app</span>, <span class="ident">counts_a</span>.<span class="ident">clone</span>());
        <span class="kw">let</span> <span class="ident">heatmap_b</span> <span class="op">=</span> <span class="ident">calculate_heatmap</span>(<span class="ident">ctx</span>, <span class="ident">app</span>, <span class="ident">counts_b</span>.<span class="ident">clone</span>());
        <span class="kw">let</span> <span class="ident">relative_heatmap</span> <span class="op">=</span> <span class="ident">calculate_relative_heatmap</span>(<span class="ident">ctx</span>, <span class="ident">app</span>, <span class="kw-2">&amp;</span><span class="ident">counts_a</span>, <span class="kw-2">&amp;</span><span class="ident">counts_b</span>);

        <span class="ident">CompareCounts</span> {
            <span class="ident">layer</span>,
            <span class="ident">world</span>: <span class="ident">make_world</span>(<span class="ident">ctx</span>, <span class="ident">app</span>),
            <span class="ident">counts_a</span>,
            <span class="ident">heatmap_a</span>,
            <span class="ident">counts_b</span>,
            <span class="ident">heatmap_b</span>,
            <span class="ident">relative_heatmap</span>,
        }
    }

    <span class="doccomment">/// Start with the relative layer if anything has changed</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">autoselect_layer</span>(<span class="kw-2">&amp;mut</span> <span class="self">self</span>) {
        <span class="self">self</span>.<span class="ident">layer</span> <span class="op">=</span> <span class="kw">if</span> <span class="self">self</span>.<span class="ident">counts_a</span>.<span class="ident">per_road</span> <span class="op">==</span> <span class="self">self</span>.<span class="ident">counts_b</span>.<span class="ident">per_road</span>
            <span class="op">&amp;&amp;</span> <span class="self">self</span>.<span class="ident">counts_a</span>.<span class="ident">per_intersection</span> <span class="op">==</span> <span class="self">self</span>.<span class="ident">counts_b</span>.<span class="ident">per_intersection</span>
        {
            <span class="ident">Layer::A</span>
        } <span class="kw">else</span> {
            <span class="ident">Layer::Compare</span>
        };
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">recalculate_b</span>(<span class="kw-2">&amp;mut</span> <span class="self">self</span>, <span class="ident">ctx</span>: <span class="kw-2">&amp;</span><span class="ident">EventCtx</span>, <span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="kw">dyn</span> <span class="ident">AppLike</span>, <span class="ident">counts_b</span>: <span class="ident">TrafficCounts</span>) {
        <span class="self">self</span>.<span class="ident">counts_b</span> <span class="op">=</span> <span class="ident">counts_b</span>;
        <span class="self">self</span>.<span class="ident">heatmap_b</span> <span class="op">=</span> <span class="ident">calculate_heatmap</span>(<span class="ident">ctx</span>, <span class="ident">app</span>, <span class="self">self</span>.<span class="ident">counts_b</span>.<span class="ident">clone</span>());
        <span class="self">self</span>.<span class="ident">relative_heatmap</span> <span class="op">=</span>
            <span class="ident">calculate_relative_heatmap</span>(<span class="ident">ctx</span>, <span class="ident">app</span>, <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">counts_a</span>, <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">counts_b</span>);
        <span class="kw">if</span> <span class="self">self</span>.<span class="ident">layer</span> <span class="op">==</span> <span class="ident">Layer::A</span> {
            <span class="self">self</span>.<span class="ident">autoselect_layer</span>();
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">empty</span>(<span class="ident">ctx</span>: <span class="kw-2">&amp;</span><span class="ident">EventCtx</span>) -&gt; <span class="ident">CompareCounts</span> {
        <span class="ident">CompareCounts</span> {
            <span class="ident">layer</span>: <span class="ident">Layer::A</span>,
            <span class="ident">world</span>: <span class="ident">World::unbounded</span>(),
            <span class="ident">counts_a</span>: <span class="ident">TrafficCounts::default</span>(),
            <span class="ident">heatmap_a</span>: <span class="ident">ToggleZoomed::empty</span>(<span class="ident">ctx</span>),
            <span class="ident">counts_b</span>: <span class="ident">TrafficCounts::default</span>(),
            <span class="ident">heatmap_b</span>: <span class="ident">ToggleZoomed::empty</span>(<span class="ident">ctx</span>),
            <span class="ident">relative_heatmap</span>: <span class="ident">ToggleZoomed::empty</span>(<span class="ident">ctx</span>),
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">get_panel_widget</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">ctx</span>: <span class="kw-2">&amp;</span><span class="ident">EventCtx</span>) -&gt; <span class="ident">Widget</span> {
        <span class="ident">Widget::col</span>(<span class="macro">vec!</span>[
            <span class="string">&quot;Show which traffic counts?&quot;</span>.<span class="ident">text_widget</span>(<span class="ident">ctx</span>),
            <span class="comment">// TODO Maybe tab style</span>
            <span class="ident">Widget::row</span>(<span class="macro">vec!</span>[
                <span class="ident">ctx</span>.<span class="ident">style</span>()
                    .<span class="ident">btn_solid_primary</span>
                    .<span class="ident">text</span>(<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">counts_a</span>.<span class="ident">description</span>)
                    .<span class="ident">disabled</span>(<span class="self">self</span>.<span class="ident">layer</span> <span class="op">==</span> <span class="ident">Layer::A</span>)
                    .<span class="ident">hotkey</span>(<span class="ident">Key::Num1</span>)
                    .<span class="ident">build_widget</span>(<span class="ident">ctx</span>, <span class="string">&quot;A counts&quot;</span>),
                <span class="ident">ctx</span>.<span class="ident">style</span>()
                    .<span class="ident">btn_solid_primary</span>
                    .<span class="ident">text</span>(<span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">counts_b</span>.<span class="ident">description</span>)
                    .<span class="ident">disabled</span>(<span class="self">self</span>.<span class="ident">layer</span> <span class="op">==</span> <span class="ident">Layer::B</span>)
                    .<span class="ident">hotkey</span>(<span class="ident">Key::Num2</span>)
                    .<span class="ident">build_widget</span>(<span class="ident">ctx</span>, <span class="string">&quot;B counts&quot;</span>),
                <span class="ident">ctx</span>.<span class="ident">style</span>()
                    .<span class="ident">btn_solid_primary</span>
                    .<span class="ident">text</span>(<span class="string">&quot;Compare&quot;</span>)
                    .<span class="ident">disabled</span>(<span class="self">self</span>.<span class="ident">layer</span> <span class="op">==</span> <span class="ident">Layer::Compare</span>)
                    .<span class="ident">hotkey</span>(<span class="ident">Key::Num3</span>)
                    .<span class="ident">build_def</span>(<span class="ident">ctx</span>),
            ]),
            <span class="ident">ctx</span>.<span class="ident">style</span>().<span class="ident">btn_outline</span>.<span class="ident">text</span>(<span class="string">&quot;Swap A&lt;-&gt;B&quot;</span>).<span class="ident">build_def</span>(<span class="ident">ctx</span>),
        ])
        .<span class="ident">section</span>(<span class="ident">ctx</span>)
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">draw</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">g</span>: <span class="kw-2">&amp;mut</span> <span class="ident">GfxCtx</span>) {
        <span class="kw">match</span> <span class="self">self</span>.<span class="ident">layer</span> {
            <span class="ident">Layer::A</span> =&gt; {
                <span class="self">self</span>.<span class="ident">heatmap_a</span>.<span class="ident">draw</span>(<span class="ident">g</span>);
            }
            <span class="ident">Layer::B</span> =&gt; {
                <span class="self">self</span>.<span class="ident">heatmap_b</span>.<span class="ident">draw</span>(<span class="ident">g</span>);
            }
            <span class="ident">Layer::Compare</span> =&gt; {
                <span class="self">self</span>.<span class="ident">relative_heatmap</span>.<span class="ident">draw</span>(<span class="ident">g</span>);
            }
        }

        <span class="comment">// Manually generate tooltips last-minute</span>
        <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">id</span>) <span class="op">=</span> <span class="self">self</span>.<span class="ident">world</span>.<span class="ident">get_hovering</span>() {
            <span class="kw">let</span> <span class="ident">count</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">id</span> {
                <span class="ident">Obj::Road</span>(<span class="ident">r</span>) =&gt; <span class="kw">match</span> <span class="self">self</span>.<span class="ident">layer</span> {
                    <span class="ident">Layer::A</span> =&gt; <span class="self">self</span>.<span class="ident">counts_a</span>.<span class="ident">per_road</span>.<span class="ident">get</span>(<span class="ident">r</span>),
                    <span class="ident">Layer::B</span> =&gt; <span class="self">self</span>.<span class="ident">counts_b</span>.<span class="ident">per_road</span>.<span class="ident">get</span>(<span class="ident">r</span>),
                    <span class="ident">Layer::Compare</span> =&gt; {
                        <span class="ident">g</span>.<span class="ident">draw_mouse_tooltip</span>(<span class="self">self</span>.<span class="ident">relative_road_tooltip</span>(<span class="ident">r</span>));
                        <span class="kw">return</span>;
                    }
                },
                <span class="ident">Obj::Intersection</span>(<span class="ident">i</span>) =&gt; <span class="kw">match</span> <span class="self">self</span>.<span class="ident">layer</span> {
                    <span class="ident">Layer::A</span> =&gt; <span class="self">self</span>.<span class="ident">counts_a</span>.<span class="ident">per_intersection</span>.<span class="ident">get</span>(<span class="ident">i</span>),
                    <span class="ident">Layer::B</span> =&gt; <span class="self">self</span>.<span class="ident">counts_b</span>.<span class="ident">per_intersection</span>.<span class="ident">get</span>(<span class="ident">i</span>),
                    <span class="ident">Layer::Compare</span> =&gt; {
                        <span class="kw">return</span>;
                    }
                },
            };
            <span class="ident">g</span>.<span class="ident">draw_mouse_tooltip</span>(<span class="ident">Text::from</span>(<span class="ident">Line</span>(<span class="ident">prettyprint_usize</span>(<span class="ident">count</span>))));
        }
    }

    <span class="kw">fn</span> <span class="ident">relative_road_tooltip</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">r</span>: <span class="ident">RoadID</span>) -&gt; <span class="ident">Text</span> {
        <span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">counts_a</span>.<span class="ident">per_road</span>.<span class="ident">get</span>(<span class="ident">r</span>);
        <span class="kw">let</span> <span class="ident">b</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">counts_b</span>.<span class="ident">per_road</span>.<span class="ident">get</span>(<span class="ident">r</span>);
        <span class="kw">let</span> <span class="ident">ratio</span> <span class="op">=</span> (<span class="ident">b</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">/</span> (<span class="ident">a</span> <span class="kw">as</span> <span class="ident">f64</span>);

        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">txt</span> <span class="op">=</span> <span class="ident">Text::from_multiline</span>(<span class="macro">vec!</span>[
            <span class="ident">Line</span>(<span class="macro">format!</span>(
                <span class="string">&quot;{}: {}&quot;</span>,
                <span class="self">self</span>.<span class="ident">counts_a</span>.<span class="ident">description</span>,
                <span class="ident">prettyprint_usize</span>(<span class="ident">a</span>)
            )),
            <span class="ident">Line</span>(<span class="macro">format!</span>(
                <span class="string">&quot;{}: {}&quot;</span>,
                <span class="self">self</span>.<span class="ident">counts_b</span>.<span class="ident">description</span>,
                <span class="ident">prettyprint_usize</span>(<span class="ident">b</span>)
            )),
        ]);
        <span class="ident">cmp_count</span>(<span class="kw-2">&amp;mut</span> <span class="ident">txt</span>, <span class="ident">a</span>, <span class="ident">b</span>);
        <span class="ident">txt</span>.<span class="ident">add_line</span>(<span class="ident">Line</span>(<span class="macro">format!</span>(
            <span class="string">&quot;{}/{}: {:.2}&quot;</span>,
            <span class="self">self</span>.<span class="ident">counts_b</span>.<span class="ident">description</span>, <span class="self">self</span>.<span class="ident">counts_a</span>.<span class="ident">description</span>, <span class="ident">ratio</span>
        )));
        <span class="ident">txt</span>
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">other_event</span>(<span class="kw-2">&amp;mut</span> <span class="self">self</span>, <span class="ident">ctx</span>: <span class="kw-2">&amp;mut</span> <span class="ident">EventCtx</span>) {
        <span class="comment">// Just trigger hovering</span>
        <span class="kw">let</span> <span class="kw">_</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">world</span>.<span class="ident">event</span>(<span class="ident">ctx</span>);
    }

    <span class="doccomment">/// If a button owned by this was clicked, returns the new widget to replace</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">on_click</span>(<span class="kw-2">&amp;mut</span> <span class="self">self</span>, <span class="ident">ctx</span>: <span class="kw-2">&amp;</span><span class="ident">EventCtx</span>, <span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="kw">dyn</span> <span class="ident">AppLike</span>, <span class="ident">x</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) -&gt; <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Widget</span><span class="op">&gt;</span> {
        <span class="self">self</span>.<span class="ident">layer</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">x</span> {
            <span class="string">&quot;A counts&quot;</span> =&gt; <span class="ident">Layer::A</span>,
            <span class="string">&quot;B counts&quot;</span> =&gt; <span class="ident">Layer::B</span>,
            <span class="string">&quot;Compare&quot;</span> =&gt; <span class="ident">Layer::Compare</span>,
            <span class="string">&quot;Swap A&lt;-&gt;B&quot;</span> =&gt; {
                <span class="ident">std::mem::swap</span>(<span class="kw-2">&amp;mut</span> <span class="self">self</span>.<span class="ident">counts_a</span>, <span class="kw-2">&amp;mut</span> <span class="self">self</span>.<span class="ident">counts_b</span>);
                <span class="self">self</span>.<span class="ident">relative_heatmap</span> <span class="op">=</span>
                    <span class="ident">calculate_relative_heatmap</span>(<span class="ident">ctx</span>, <span class="ident">app</span>, <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">counts_a</span>, <span class="kw-2">&amp;</span><span class="self">self</span>.<span class="ident">counts_b</span>);
                <span class="self">self</span>.<span class="ident">layer</span>
            }
            <span class="kw">_</span> =&gt; {
                <span class="kw">return</span> <span class="prelude-val">None</span>;
            }
        };
        <span class="prelude-val">Some</span>(<span class="self">self</span>.<span class="ident">get_panel_widget</span>(<span class="ident">ctx</span>))
    }
}

<span class="kw">fn</span> <span class="ident">calculate_heatmap</span>(<span class="ident">ctx</span>: <span class="kw-2">&amp;</span><span class="ident">EventCtx</span>, <span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="kw">dyn</span> <span class="ident">AppLike</span>, <span class="ident">counts</span>: <span class="ident">TrafficCounts</span>) -&gt; <span class="ident">ToggleZoomed</span> {
    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">colorer</span> <span class="op">=</span> <span class="ident">ColorNetwork::no_fading</span>(<span class="ident">app</span>);
    <span class="comment">// TODO The scale will be different for roads and intersections</span>
    <span class="ident">colorer</span>.<span class="ident">ranked_roads</span>(<span class="ident">counts</span>.<span class="ident">per_road</span>, <span class="kw-2">&amp;</span><span class="ident">app</span>.<span class="ident">cs</span>().<span class="ident">good_to_bad_red</span>);
    <span class="ident">colorer</span>.<span class="ident">ranked_intersections</span>(<span class="ident">counts</span>.<span class="ident">per_intersection</span>, <span class="kw-2">&amp;</span><span class="ident">app</span>.<span class="ident">cs</span>().<span class="ident">good_to_bad_red</span>);
    <span class="ident">colorer</span>.<span class="ident">build</span>(<span class="ident">ctx</span>)
}

<span class="kw">fn</span> <span class="ident">calculate_relative_heatmap</span>(
    <span class="ident">ctx</span>: <span class="kw-2">&amp;</span><span class="ident">EventCtx</span>,
    <span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="kw">dyn</span> <span class="ident">AppLike</span>,
    <span class="ident">counts_a</span>: <span class="kw-2">&amp;</span><span class="ident">TrafficCounts</span>,
    <span class="ident">counts_b</span>: <span class="kw-2">&amp;</span><span class="ident">TrafficCounts</span>,
) -&gt; <span class="ident">ToggleZoomed</span> {
    <span class="comment">// First just understand the counts...</span>
    <span class="comment">// TODO This doesn&#39;t have explicit 0&#39;s</span>
    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">hgram_before</span> <span class="op">=</span> <span class="ident">Histogram::new</span>();
    <span class="kw">for</span> (<span class="kw">_</span>, <span class="ident">cnt</span>) <span class="kw">in</span> <span class="ident">counts_a</span>.<span class="ident">per_road</span>.<span class="ident">borrow</span>() {
        <span class="ident">hgram_before</span>.<span class="ident">add</span>(<span class="kw-2">*</span><span class="ident">cnt</span>);
    }
    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">hgram_after</span> <span class="op">=</span> <span class="ident">Histogram::new</span>();
    <span class="kw">for</span> (<span class="kw">_</span>, <span class="ident">cnt</span>) <span class="kw">in</span> <span class="ident">counts_b</span>.<span class="ident">per_road</span>.<span class="ident">borrow</span>() {
        <span class="ident">hgram_after</span>.<span class="ident">add</span>(<span class="kw-2">*</span><span class="ident">cnt</span>);
    }
    <span class="macro">info!</span>(<span class="string">&quot;Road counts before: {}&quot;</span>, <span class="ident">hgram_before</span>.<span class="ident">describe</span>());
    <span class="macro">info!</span>(<span class="string">&quot;Road counts after: {}&quot;</span>, <span class="ident">hgram_after</span>.<span class="ident">describe</span>());

    <span class="comment">// What&#39;s physical road width look like?</span>
    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">hgram_width</span> <span class="op">=</span> <span class="ident">Histogram::new</span>();
    <span class="kw">for</span> <span class="ident">r</span> <span class="kw">in</span> <span class="ident">app</span>.<span class="ident">map</span>().<span class="ident">all_roads</span>() {
        <span class="ident">hgram_width</span>.<span class="ident">add</span>(<span class="ident">r</span>.<span class="ident">get_width</span>());
    }
    <span class="macro">info!</span>(<span class="string">&quot;Physical road widths: {}&quot;</span>, <span class="ident">hgram_width</span>.<span class="ident">describe</span>());

    <span class="comment">// TODO This is still a bit arbitrary</span>
    <span class="kw">let</span> <span class="ident">scale</span> <span class="op">=</span> <span class="ident">DivergingScale::new</span>(<span class="ident">Color::hex</span>(<span class="string">&quot;#5D9630&quot;</span>), <span class="ident">Color::WHITE</span>, <span class="ident">Color::hex</span>(<span class="string">&quot;#A32015&quot;</span>))
        .<span class="ident">range</span>(<span class="number">0.0</span>, <span class="number">2.0</span>);

    <span class="comment">// Draw road width based on the count before</span>
    <span class="comment">// TODO unwrap will crash on an empty demand model</span>
    <span class="kw">let</span> <span class="ident">min_count</span> <span class="op">=</span> <span class="ident">hgram_before</span>.<span class="ident">select</span>(<span class="ident">Statistic::Min</span>).<span class="ident">unwrap</span>();
    <span class="kw">let</span> <span class="ident">max_count</span> <span class="op">=</span> <span class="ident">hgram_before</span>.<span class="ident">select</span>(<span class="ident">Statistic::Max</span>).<span class="ident">unwrap</span>();

    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">draw_roads</span> <span class="op">=</span> <span class="ident">GeomBatch::new</span>();
    <span class="kw">for</span> (<span class="ident">r</span>, <span class="ident">before</span>, <span class="ident">after</span>) <span class="kw">in</span> <span class="ident">counts_a</span>.<span class="ident">per_road</span>.<span class="ident">clone</span>().<span class="ident">compare</span>(<span class="ident">counts_b</span>.<span class="ident">per_road</span>.<span class="ident">clone</span>()) {
        <span class="kw">let</span> <span class="ident">ratio</span> <span class="op">=</span> (<span class="ident">after</span> <span class="kw">as</span> <span class="ident">f64</span>) <span class="op">/</span> (<span class="ident">before</span> <span class="kw">as</span> <span class="ident">f64</span>);
        <span class="kw">let</span> <span class="ident">color</span> <span class="op">=</span> <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">c</span>) <span class="op">=</span> <span class="ident">scale</span>.<span class="ident">eval</span>(<span class="ident">ratio</span>) {
            <span class="ident">c</span>
        } <span class="kw">else</span> {
            <span class="kw">continue</span>;
        };

        <span class="comment">// TODO Refactor histogram helpers</span>
        <span class="kw">let</span> <span class="ident">pct_count</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">before</span> <span class="op">==</span> <span class="number">0</span> {
            <span class="number">0.0</span>
        } <span class="kw">else</span> {
            (<span class="ident">before</span> <span class="op">-</span> <span class="ident">min_count</span>) <span class="kw">as</span> <span class="ident">f64</span> <span class="op">/</span> (<span class="ident">max_count</span> <span class="op">-</span> <span class="ident">min_count</span>) <span class="kw">as</span> <span class="ident">f64</span>
        };
        <span class="comment">// TODO Pretty arbitrary. Ideally we&#39;d hide roads and intersections underneath...</span>
        <span class="kw">let</span> <span class="ident">width</span> <span class="op">=</span> <span class="ident">Distance::meters</span>(<span class="number">2.0</span>) <span class="op">+</span> <span class="ident">pct_count</span> <span class="op">*</span> <span class="ident">Distance::meters</span>(<span class="number">10.0</span>);

        <span class="ident">draw_roads</span>.<span class="ident">push</span>(<span class="ident">color</span>, <span class="ident">app</span>.<span class="ident">map</span>().<span class="ident">get_r</span>(<span class="ident">r</span>).<span class="ident">center_pts</span>.<span class="ident">make_polygons</span>(<span class="ident">width</span>));
    }
    <span class="ident">ToggleZoomedBuilder::from</span>(<span class="ident">draw_roads</span>).<span class="ident">build</span>(<span class="ident">ctx</span>)
}

<span class="kw">fn</span> <span class="ident">make_world</span>(<span class="ident">ctx</span>: <span class="kw-2">&amp;mut</span> <span class="ident">EventCtx</span>, <span class="ident">app</span>: <span class="kw-2">&amp;</span><span class="kw">dyn</span> <span class="ident">AppLike</span>) -&gt; <span class="ident">World</span><span class="op">&lt;</span><span class="ident">Obj</span><span class="op">&gt;</span> {
    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">world</span> <span class="op">=</span> <span class="ident">World::bounded</span>(<span class="ident">app</span>.<span class="ident">map</span>().<span class="ident">get_bounds</span>());
    <span class="kw">for</span> <span class="ident">r</span> <span class="kw">in</span> <span class="ident">app</span>.<span class="ident">map</span>().<span class="ident">all_roads</span>() {
        <span class="ident">world</span>
            .<span class="ident">add</span>(<span class="ident">Obj::Road</span>(<span class="ident">r</span>.<span class="ident">id</span>))
            .<span class="ident">hitbox</span>(<span class="ident">r</span>.<span class="ident">get_thick_polygon</span>())
            .<span class="ident">drawn_in_master_batch</span>()
            .<span class="ident">invisibly_hoverable</span>()
            .<span class="ident">build</span>(<span class="ident">ctx</span>);
    }
    <span class="kw">for</span> <span class="ident">i</span> <span class="kw">in</span> <span class="ident">app</span>.<span class="ident">map</span>().<span class="ident">all_intersections</span>() {
        <span class="ident">world</span>
            .<span class="ident">add</span>(<span class="ident">Obj::Intersection</span>(<span class="ident">i</span>.<span class="ident">id</span>))
            .<span class="ident">hitbox</span>(<span class="ident">i</span>.<span class="ident">polygon</span>.<span class="ident">clone</span>())
            .<span class="ident">drawn_in_master_batch</span>()
            .<span class="ident">invisibly_hoverable</span>()
            .<span class="ident">build</span>(<span class="ident">ctx</span>);
    }
    <span class="ident">world</span>
}
</code></pre></div>
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