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</pre><div class="example-wrap"><pre class="rust ">
<span class="kw">use</span> <span class="ident">std</span>::<span class="ident">cell</span>::<span class="ident">RefCell</span>;

<span class="kw">use</span> <span class="ident">geom</span>::{<span class="ident">Angle</span>, <span class="ident">Distance</span>, <span class="ident">Line</span>, <span class="ident">Polygon</span>, <span class="ident">Pt2D</span>, <span class="ident">Ring</span>};
<span class="kw">use</span> <span class="ident">map_model</span>::{<span class="ident">Building</span>, <span class="ident">BuildingID</span>, <span class="ident">LaneType</span>, <span class="ident">Map</span>, <span class="ident">OffstreetParking</span>, <span class="ident">NORMAL_LANE_THICKNESS</span>};
<span class="kw">use</span> <span class="ident">widgetry</span>::{<span class="ident">Color</span>, <span class="ident">Drawable</span>, <span class="ident">EventCtx</span>, <span class="ident">GeomBatch</span>, <span class="ident">GfxCtx</span>, <span class="ident">Line</span>, <span class="ident">Text</span>};

<span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">colors</span>::{<span class="ident">ColorScheme</span>, <span class="ident">ColorSchemeChoice</span>};
<span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">options</span>::{<span class="ident">CameraAngle</span>, <span class="ident">Options</span>};
<span class="kw">use</span> <span class="kw">crate</span>::<span class="ident">render</span>::{<span class="ident">DrawOptions</span>, <span class="ident">Renderable</span>, <span class="ident">OUTLINE_THICKNESS</span>};
<span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">AppLike</span>, <span class="ident">ID</span>};

<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">DrawBuilding</span> {
    <span class="kw">pub</span> <span class="ident">id</span>: <span class="ident">BuildingID</span>,
    <span class="ident">label</span>: <span class="ident">RefCell</span><span class="op">&lt;</span><span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">Drawable</span><span class="op">&gt;</span><span class="op">&gt;</span>,
}

<span class="kw">impl</span> <span class="ident">DrawBuilding</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;</span><span class="ident">EventCtx</span>,
        <span class="ident">bldg</span>: <span class="kw-2">&amp;</span><span class="ident">Building</span>,
        <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>,
        <span class="ident">cs</span>: <span class="kw-2">&amp;</span><span class="ident">ColorScheme</span>,
        <span class="ident">opts</span>: <span class="kw-2">&amp;</span><span class="ident">Options</span>,
        <span class="ident">bldg_batch</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">GeomBatch</span>,
        <span class="ident">outlines_batch</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">GeomBatch</span>,
    ) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">DrawBuilding</span> {
        <span class="kw">let</span> <span class="ident">bldg_color</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">bldg</span>.<span class="ident">amenities</span>.<span class="ident">is_empty</span>() {
            <span class="ident">cs</span>.<span class="ident">residential_building</span>
        } <span class="kw">else</span> {
            <span class="ident">cs</span>.<span class="ident">commercial_building</span>
        };

        <span class="kw">match</span> <span class="kw-2">&amp;</span><span class="ident">opts</span>.<span class="ident">camera_angle</span> {
            <span class="ident">CameraAngle</span>::<span class="ident">TopDown</span> <span class="op">=</span><span class="op">&gt;</span> {
                <span class="ident">bldg_batch</span>.<span class="ident">push</span>(<span class="ident">bldg_color</span>, <span class="ident">bldg</span>.<span class="ident">polygon</span>.<span class="ident">clone</span>());
                <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">p</span>) <span class="op">=</span> <span class="ident">bldg</span>.<span class="ident">polygon</span>.<span class="ident">to_outline</span>(<span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="number">0.1</span>)) {
                    <span class="ident">outlines_batch</span>.<span class="ident">push</span>(<span class="ident">cs</span>.<span class="ident">building_outline</span>, <span class="ident">p</span>);
                }

                <span class="kw">let</span> <span class="ident">parking_icon</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">bldg</span>.<span class="ident">parking</span> {
                    <span class="ident">OffstreetParking</span>::<span class="ident">PublicGarage</span>(<span class="kw">_</span>, <span class="kw">_</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="bool-val">true</span>,
                    <span class="ident">OffstreetParking</span>::<span class="ident">Private</span>(<span class="kw">_</span>, <span class="ident">garage</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="ident">garage</span>,
                };
                <span class="kw">if</span> <span class="ident">parking_icon</span> {
                    <span class="comment">// Might need to scale down more for some buildings, but so far, this works</span>
                    <span class="comment">// everywhere.</span>
                    <span class="ident">bldg_batch</span>.<span class="ident">append</span>(
                        <span class="ident">GeomBatch</span>::<span class="ident">load_svg</span>(<span class="ident">ctx</span>, <span class="string">&quot;system/assets/map/parking.svg&quot;</span>)
                            .<span class="ident">scale</span>(<span class="number">0.1</span>)
                            .<span class="ident">centered_on</span>(<span class="ident">bldg</span>.<span class="ident">label_center</span>),
                    );
                }
            }
            <span class="ident">CameraAngle</span>::<span class="ident">Abstract</span> <span class="op">=</span><span class="op">&gt;</span> {
                <span class="comment">// TODO The hitbox needs to change too</span>
                <span class="ident">bldg_batch</span>.<span class="ident">push</span>(
                    <span class="ident">bldg_color</span>,
                    <span class="ident">Polygon</span>::<span class="ident">rectangle_centered</span>(
                        <span class="ident">bldg</span>.<span class="ident">polygon</span>.<span class="ident">center</span>(),
                        <span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="number">5.0</span>),
                        <span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="number">5.0</span>),
                    ),
                );
            }
            <span class="ident">x</span> <span class="op">=</span><span class="op">&gt;</span> {
                <span class="kw">let</span> <span class="ident">angle</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">x</span> {
                    <span class="ident">CameraAngle</span>::<span class="ident">IsometricNE</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Angle</span>::<span class="ident">degrees</span>(<span class="op">-</span><span class="number">45.0</span>),
                    <span class="ident">CameraAngle</span>::<span class="ident">IsometricNW</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Angle</span>::<span class="ident">degrees</span>(<span class="op">-</span><span class="number">135.0</span>),
                    <span class="ident">CameraAngle</span>::<span class="ident">IsometricSE</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Angle</span>::<span class="ident">degrees</span>(<span class="number">45.0</span>),
                    <span class="ident">CameraAngle</span>::<span class="ident">IsometricSW</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Angle</span>::<span class="ident">degrees</span>(<span class="number">135.0</span>),
                    <span class="ident">CameraAngle</span>::<span class="ident">TopDown</span> <span class="op">|</span> <span class="ident">CameraAngle</span>::<span class="ident">Abstract</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">unreachable</span><span class="macro">!</span>(),
                };

                <span class="kw">let</span> <span class="ident">bldg_height_per_level</span> <span class="op">=</span> <span class="number">3.5</span>;
                <span class="comment">// In downtown areas, really tall buildings look kind of ridculous next to</span>
                <span class="comment">// everything else. So we artifically compress the number of levels a bit.</span>
                <span class="kw">let</span> <span class="ident">bldg_rendered_meters</span> <span class="op">=</span> <span class="ident">bldg_height_per_level</span> <span class="op">*</span> <span class="ident">bldg</span>.<span class="ident">levels</span>.<span class="ident">powf</span>(<span class="number">0.8</span>);
                <span class="kw">let</span> <span class="ident">height</span> <span class="op">=</span> <span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="ident">bldg_rendered_meters</span>);

                <span class="kw">let</span> <span class="ident">map_bounds</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_gps_bounds</span>().<span class="ident">to_bounds</span>();
                <span class="kw">let</span> (<span class="ident">map_width</span>, <span class="ident">map_height</span>) <span class="op">=</span> (<span class="ident">map_bounds</span>.<span class="ident">width</span>(), <span class="ident">map_bounds</span>.<span class="ident">height</span>());
                <span class="kw">let</span> <span class="ident">map_length</span> <span class="op">=</span> <span class="ident">map_width</span>.<span class="ident">hypot</span>(<span class="ident">map_height</span>);

                <span class="kw">let</span> <span class="ident">distance</span> <span class="op">=</span> <span class="op">|</span><span class="ident">pt</span>: <span class="kw-2">&amp;</span><span class="ident">Pt2D</span><span class="op">|</span> {
                    <span class="comment">// some normalization so we can compute the distance to the corner of the</span>
                    <span class="comment">// screen from which the orthographic projection is based.</span>
                    <span class="kw">let</span> <span class="ident">projection_origin</span> <span class="op">=</span> <span class="kw">match</span> <span class="ident">x</span> {
                        <span class="ident">CameraAngle</span>::<span class="ident">IsometricNE</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Pt2D</span>::<span class="ident">new</span>(<span class="number">0.0</span>, <span class="ident">map_height</span>),
                        <span class="ident">CameraAngle</span>::<span class="ident">IsometricNW</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Pt2D</span>::<span class="ident">new</span>(<span class="ident">map_width</span>, <span class="ident">map_height</span>),
                        <span class="ident">CameraAngle</span>::<span class="ident">IsometricSE</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Pt2D</span>::<span class="ident">new</span>(<span class="number">0.0</span>, <span class="number">0.0</span>),
                        <span class="ident">CameraAngle</span>::<span class="ident">IsometricSW</span> <span class="op">=</span><span class="op">&gt;</span> <span class="ident">Pt2D</span>::<span class="ident">new</span>(<span class="ident">map_width</span>, <span class="number">0.0</span>),
                        <span class="ident">CameraAngle</span>::<span class="ident">TopDown</span> <span class="op">|</span> <span class="ident">CameraAngle</span>::<span class="ident">Abstract</span> <span class="op">=</span><span class="op">&gt;</span> <span class="macro">unreachable</span><span class="macro">!</span>(),
                    };

                    <span class="kw">let</span> <span class="ident">abs_pt</span> <span class="op">=</span> <span class="ident">Pt2D</span>::<span class="ident">new</span>(
                        (<span class="ident">pt</span>.<span class="ident">x</span>() <span class="op">-</span> <span class="ident">projection_origin</span>.<span class="ident">x</span>()).<span class="ident">abs</span>(),
                        (<span class="ident">pt</span>.<span class="ident">y</span>() <span class="op">-</span> <span class="ident">projection_origin</span>.<span class="ident">y</span>()).<span class="ident">abs</span>(),
                    );

                    <span class="kw">let</span> <span class="ident">a</span> <span class="op">=</span> <span class="ident">f64</span>::<span class="ident">hypot</span>(<span class="ident">abs_pt</span>.<span class="ident">x</span>(), <span class="ident">abs_pt</span>.<span class="ident">y</span>());
                    <span class="kw">let</span> <span class="ident">theta</span> <span class="op">=</span> <span class="ident">f64</span>::<span class="ident">atan</span>(<span class="ident">abs_pt</span>.<span class="ident">y</span>() <span class="op">/</span> <span class="ident">abs_pt</span>.<span class="ident">x</span>());
                    <span class="kw">let</span> <span class="ident">distance</span> <span class="op">=</span> <span class="ident">a</span> <span class="op">*</span> <span class="ident">f64</span>::<span class="ident">sin</span>(<span class="ident">theta</span> <span class="op">+</span> <span class="ident">std</span>::<span class="ident">f64</span>::<span class="ident">consts</span>::<span class="ident">PI</span> <span class="op">/</span> <span class="number">4.0</span>);
                    <span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="ident">distance</span>)
                };

                <span class="comment">// Things closer to the isometric axis should appear in front of things farther</span>
                <span class="comment">// away, so we give them a higher z-index.</span>
                <span class="comment">//</span>
                <span class="comment">// Naively, we compute the entire building&#39;s distance as the distance from its</span>
                <span class="comment">// closest point. This is simple and usually works, but will likely fail on more</span>
                <span class="comment">// complex building arrangements, e.g. if a building were tightly encircled by a</span>
                <span class="comment">// large building.</span>
                <span class="kw">let</span> <span class="ident">closest_pt</span> <span class="op">=</span> <span class="ident">bldg</span>
                    .<span class="ident">polygon</span>
                    .<span class="ident">points</span>()
                    .<span class="ident">into_iter</span>()
                    .<span class="ident">min_by</span>(<span class="op">|</span><span class="ident">a</span>, <span class="ident">b</span><span class="op">|</span> <span class="ident">distance</span>(<span class="ident">a</span>).<span class="ident">cmp</span>(<span class="kw-2">&amp;</span><span class="ident">distance</span>(<span class="ident">b</span>)));

                <span class="kw">let</span> <span class="ident">distance_from_projection_axis</span> <span class="op">=</span> <span class="ident">closest_pt</span>
                    .<span class="ident">map</span>(<span class="op">|</span><span class="ident">pt</span><span class="op">|</span> <span class="ident">distance</span>(<span class="ident">pt</span>).<span class="ident">inner_meters</span>())
                    .<span class="ident">unwrap_or</span>(<span class="number">0.0</span>);

                <span class="comment">// smaller z renders above larger</span>
                <span class="kw">let</span> <span class="ident">scale_factor</span> <span class="op">=</span> <span class="ident">map_length</span>;
                <span class="kw">let</span> <span class="ident">groundfloor_z</span> <span class="op">=</span> <span class="ident">distance_from_projection_axis</span> <span class="op">/</span> <span class="ident">scale_factor</span> <span class="op">-</span> <span class="number">1.0</span>;
                <span class="kw">let</span> <span class="ident">roof_z</span> <span class="op">=</span> <span class="ident">groundfloor_z</span> <span class="op">-</span> <span class="ident">height</span>.<span class="ident">inner_meters</span>() <span class="op">/</span> <span class="ident">scale_factor</span>;

                <span class="comment">// TODO Some buildings have holes in them</span>
                <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">roof</span>) <span class="op">=</span> <span class="ident">Ring</span>::<span class="ident">new</span>(
                    <span class="ident">bldg</span>.<span class="ident">polygon</span>
                        .<span class="ident">points</span>()
                        .<span class="ident">iter</span>()
                        .<span class="ident">map</span>(<span class="op">|</span><span class="ident">pt</span><span class="op">|</span> <span class="ident">pt</span>.<span class="ident">project_away</span>(<span class="ident">height</span>, <span class="ident">angle</span>))
                        .<span class="ident">collect</span>(),
                ) {
                    <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">p</span>) <span class="op">=</span> <span class="ident">bldg</span>.<span class="ident">polygon</span>.<span class="ident">to_outline</span>(<span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="number">0.3</span>)) {
                        <span class="ident">bldg_batch</span>.<span class="ident">push</span>(<span class="ident">Color</span>::<span class="ident">BLACK</span>, <span class="ident">p</span>);
                    }

                    <span class="comment">// In actuality, the z of the walls should start at groundfloor_z and end at</span>
                    <span class="comment">// roof_z, but since we aren&#39;t dealing with actual 3d geometries, we have to</span>
                    <span class="comment">// pick one value. Anecdotally, picking a value between the two seems to</span>
                    <span class="comment">// usually looks right, but probably breaks down in certain overlap scenarios.</span>
                    <span class="kw">let</span> <span class="ident">wall_z</span> <span class="op">=</span> (<span class="ident">groundfloor_z</span> <span class="op">+</span> <span class="ident">roof_z</span>) <span class="op">/</span> <span class="number">2.0</span>;

                    <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">wall_beams</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
                    <span class="kw">for</span> (<span class="ident">low</span>, <span class="ident">high</span>) <span class="kw">in</span> <span class="ident">bldg</span>.<span class="ident">polygon</span>.<span class="ident">points</span>().<span class="ident">iter</span>().<span class="ident">zip</span>(<span class="ident">roof</span>.<span class="ident">points</span>().<span class="ident">iter</span>()) {
                        <span class="comment">// Sometimes building height is 0!</span>
                        <span class="comment">// https://www.openstreetmap.org/way/390547658</span>
                        <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">l</span>) <span class="op">=</span> <span class="ident">Line</span>::<span class="ident">new</span>(<span class="kw-2">*</span><span class="ident">low</span>, <span class="kw-2">*</span><span class="ident">high</span>) {
                            <span class="ident">wall_beams</span>.<span class="ident">push</span>(<span class="ident">l</span>);
                        }
                    }
                    <span class="kw">let</span> <span class="ident">wall_color</span> <span class="op">=</span> <span class="ident">Color</span>::<span class="ident">hex</span>(<span class="string">&quot;#BBBEC3&quot;</span>);
                    <span class="kw">for</span> (<span class="ident">wall1</span>, <span class="ident">wall2</span>) <span class="kw">in</span> <span class="ident">wall_beams</span>.<span class="ident">iter</span>().<span class="ident">zip</span>(<span class="ident">wall_beams</span>.<span class="ident">iter</span>().<span class="ident">skip</span>(<span class="number">1</span>)) {
                        <span class="ident">bldg_batch</span>.<span class="ident">push_with_z</span>(
                            <span class="ident">wall_color</span>,
                            <span class="ident">Ring</span>::<span class="ident">must_new</span>(<span class="macro">vec</span><span class="macro">!</span>[
                                <span class="ident">wall1</span>.<span class="ident">pt1</span>(),
                                <span class="ident">wall1</span>.<span class="ident">pt2</span>(),
                                <span class="ident">wall2</span>.<span class="ident">pt2</span>(),
                                <span class="ident">wall2</span>.<span class="ident">pt1</span>(),
                                <span class="ident">wall1</span>.<span class="ident">pt1</span>(),
                            ])
                            .<span class="ident">to_polygon</span>(),
                            <span class="ident">wall_z</span>,
                        );
                    }
                    <span class="kw">for</span> <span class="ident">wall</span> <span class="kw">in</span> <span class="ident">wall_beams</span> {
                        <span class="ident">bldg_batch</span>.<span class="ident">push_with_z</span>(
                            <span class="ident">Color</span>::<span class="ident">BLACK</span>,
                            <span class="ident">wall</span>.<span class="ident">make_polygons</span>(<span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="number">0.1</span>)),
                            <span class="ident">wall_z</span>,
                        );
                    }

                    <span class="ident">bldg_batch</span>.<span class="ident">push_with_z</span>(<span class="ident">bldg_color</span>, <span class="ident">roof</span>.<span class="ident">clone</span>().<span class="ident">to_polygon</span>(), <span class="ident">roof_z</span>);
                    <span class="ident">bldg_batch</span>.<span class="ident">push_with_z</span>(
                        <span class="ident">Color</span>::<span class="ident">BLACK</span>,
                        <span class="ident">roof</span>.<span class="ident">to_outline</span>(<span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="number">0.3</span>)),
                        <span class="ident">roof_z</span>,
                    );
                } <span class="kw">else</span> {
                    <span class="ident">bldg_batch</span>.<span class="ident">push</span>(<span class="ident">bldg_color</span>, <span class="ident">bldg</span>.<span class="ident">polygon</span>.<span class="ident">clone</span>());
                    <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">p</span>) <span class="op">=</span> <span class="ident">bldg</span>.<span class="ident">polygon</span>.<span class="ident">to_outline</span>(<span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="number">0.1</span>)) {
                        <span class="ident">outlines_batch</span>.<span class="ident">push</span>(<span class="ident">cs</span>.<span class="ident">building_outline</span>, <span class="ident">p</span>);
                    }
                }
            }
        }

        <span class="ident">DrawBuilding</span> {
            <span class="ident">id</span>: <span class="ident">bldg</span>.<span class="ident">id</span>,
            <span class="ident">label</span>: <span class="ident">RefCell</span>::<span class="ident">new</span>(<span class="prelude-val">None</span>),
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">draw_driveway</span>(
        <span class="ident">bldg</span>: <span class="kw-2">&amp;</span><span class="ident">Building</span>,
        <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>,
        <span class="ident">cs</span>: <span class="kw-2">&amp;</span><span class="ident">ColorScheme</span>,
        <span class="ident">opts</span>: <span class="kw-2">&amp;</span><span class="ident">Options</span>,
        <span class="ident">batch</span>: <span class="kw-2">&amp;</span><span class="kw-2">mut</span> <span class="ident">GeomBatch</span>,
    ) {
        <span class="kw">if</span> <span class="ident">opts</span>.<span class="ident">camera_angle</span> <span class="op">!</span><span class="op">=</span> <span class="ident">CameraAngle</span>::<span class="ident">Abstract</span> {
            <span class="comment">// Trim the driveway away from the sidewalk&#39;s center line, so that it doesn&#39;t overlap.</span>
            <span class="comment">// For now, this cleanup is visual; it doesn&#39;t belong in the map_model</span>
            <span class="comment">// layer.</span>
            <span class="kw">let</span> <span class="ident">orig_pl</span> <span class="op">=</span> <span class="kw-2">&amp;</span><span class="ident">bldg</span>.<span class="ident">driveway_geom</span>;
            <span class="kw">let</span> <span class="ident">driveway</span> <span class="op">=</span> <span class="ident">orig_pl</span>
                .<span class="ident">slice</span>(
                    <span class="ident">Distance</span>::<span class="ident">ZERO</span>,
                    <span class="ident">orig_pl</span>.<span class="ident">length</span>() <span class="op">-</span> <span class="ident">map</span>.<span class="ident">get_l</span>(<span class="ident">bldg</span>.<span class="ident">sidewalk</span>()).<span class="ident">width</span> <span class="op">/</span> <span class="number">2.0</span>,
                )
                .<span class="ident">map</span>(<span class="op">|</span>(<span class="ident">pl</span>, <span class="kw">_</span>)<span class="op">|</span> <span class="ident">pl</span>)
                .<span class="ident">unwrap_or_else</span>(<span class="op">|</span><span class="kw">_</span><span class="op">|</span> <span class="ident">orig_pl</span>.<span class="ident">clone</span>());

            <span class="ident">batch</span>.<span class="ident">push</span>(
                <span class="kw">if</span> <span class="ident">opts</span>.<span class="ident">color_scheme</span> <span class="op">=</span><span class="op">=</span> <span class="ident">ColorSchemeChoice</span>::<span class="ident">NightMode</span> {
                    <span class="ident">Color</span>::<span class="ident">hex</span>(<span class="string">&quot;#4B4B4B&quot;</span>)
                } <span class="kw">else</span> {
                    <span class="ident">cs</span>.<span class="ident">zoomed_road_surface</span>(
                        <span class="ident">LaneType</span>::<span class="ident">Sidewalk</span>,
                        <span class="ident">map</span>.<span class="ident">get_parent</span>(<span class="ident">bldg</span>.<span class="ident">sidewalk</span>()).<span class="ident">get_rank</span>(),
                    )
                },
                <span class="ident">driveway</span>.<span class="ident">make_polygons</span>(<span class="ident">NORMAL_LANE_THICKNESS</span>),
            );
        }
    }
}

<span class="kw">impl</span> <span class="ident">Renderable</span> <span class="kw">for</span> <span class="ident">DrawBuilding</span> {
    <span class="kw">fn</span> <span class="ident">get_id</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">ID</span> {
        <span class="ident">ID</span>::<span class="ident">Building</span>(<span class="self">self</span>.<span class="ident">id</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;</span><span class="kw-2">mut</span> <span class="ident">GfxCtx</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">opts</span>: <span class="kw-2">&amp;</span><span class="ident">DrawOptions</span>) {
        <span class="kw">if</span> <span class="ident">opts</span>.<span class="ident">label_buildings</span> {
            <span class="comment">// Labels are expensive to compute up-front, so do it lazily, since we don&#39;t really</span>
            <span class="comment">// zoom in on all buildings in a single session anyway</span>
            <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">label</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">label</span>.<span class="ident">borrow_mut</span>();
            <span class="kw">if</span> <span class="ident">label</span>.<span class="ident">is_none</span>() {
                <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">batch</span> <span class="op">=</span> <span class="ident">GeomBatch</span>::<span class="ident">new</span>();
                <span class="kw">let</span> <span class="ident">b</span> <span class="op">=</span> <span class="ident">app</span>.<span class="ident">map</span>().<span class="ident">get_b</span>(<span class="self">self</span>.<span class="ident">id</span>);
                <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">a</span>) <span class="op">=</span> <span class="ident">b</span>.<span class="ident">amenities</span>.<span class="ident">iter</span>().<span class="ident">next</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</span>::<span class="ident">from</span>(
                        <span class="ident">Line</span>(<span class="ident">a</span>.<span class="ident">names</span>.<span class="ident">get</span>(<span class="ident">app</span>.<span class="ident">opts</span>().<span class="ident">language</span>.<span class="ident">as_ref</span>())).<span class="ident">fg</span>(<span class="ident">Color</span>::<span class="ident">BLACK</span>),
                    );
                    <span class="kw">if</span> <span class="ident">b</span>.<span class="ident">amenities</span>.<span class="ident">len</span>() <span class="op">&gt;</span> <span class="number">1</span> {
                        <span class="ident">txt</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot; (+{})&quot;</span>, <span class="ident">b</span>.<span class="ident">amenities</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">1</span>)).<span class="ident">fg</span>(<span class="ident">Color</span>::<span class="ident">BLACK</span>));
                    }
                    <span class="ident">batch</span>.<span class="ident">append</span>(
                        <span class="ident">txt</span>.<span class="ident">render_autocropped</span>(<span class="ident">g</span>)
                            .<span class="ident">scale</span>(<span class="number">0.1</span>)
                            .<span class="ident">centered_on</span>(<span class="ident">b</span>.<span class="ident">label_center</span>),
                    );
                }
                <span class="kw-2">*</span><span class="ident">label</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">g</span>.<span class="ident">prerender</span>.<span class="ident">upload</span>(<span class="ident">batch</span>));
            }
            <span class="ident">g</span>.<span class="ident">redraw</span>(<span class="ident">label</span>.<span class="ident">as_ref</span>().<span class="ident">unwrap</span>());
        }
    }

    <span class="comment">// Some buildings cover up tunnels</span>
    <span class="kw">fn</span> <span class="ident">get_zorder</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">isize</span> {
        <span class="number">0</span>
    }

    <span class="kw">fn</span> <span class="ident">get_outline</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Polygon</span> {
        <span class="kw">let</span> <span class="ident">b</span> <span class="op">=</span> <span class="ident">map</span>.<span class="ident">get_b</span>(<span class="self">self</span>.<span class="ident">id</span>);
        <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Ok</span>(<span class="ident">p</span>) <span class="op">=</span> <span class="ident">b</span>.<span class="ident">polygon</span>.<span class="ident">to_outline</span>(<span class="ident">OUTLINE_THICKNESS</span>) {
            <span class="ident">p</span>
        } <span class="kw">else</span> {
            <span class="ident">b</span>.<span class="ident">polygon</span>.<span class="ident">clone</span>()
        }
    }

    <span class="kw">fn</span> <span class="ident">contains_pt</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">pt</span>: <span class="ident">Pt2D</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">Map</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">bool</span> {
        <span class="ident">map</span>.<span class="ident">get_b</span>(<span class="self">self</span>.<span class="ident">id</span>).<span class="ident">polygon</span>.<span class="ident">contains_pt</span>(<span class="ident">pt</span>)
    }
}
</pre></div>
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