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</pre><pre class="rust"><code><span class="kw">use</span> <span class="ident">std::cell::RefCell</span>;

<span class="kw">use</span> <span class="ident">geom</span>::{<span class="ident">Distance</span>, <span class="ident">Polygon</span>, <span class="ident">Pt2D</span>};
<span class="kw">use</span> <span class="ident">map_model</span>::{<span class="ident">Building</span>, <span class="ident">LaneType</span>, <span class="ident">Map</span>, <span class="ident">Road</span>, <span class="ident">RoadID</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">GeomBatch</span>, <span class="ident">GfxCtx</span>, <span class="ident">Line</span>, <span class="ident">Prerender</span>, <span class="ident">Text</span>};

<span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::colors::ColorSchemeChoice</span>;
<span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::options::CameraAngle</span>;
<span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::render::lane::DrawLane</span>;
<span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::render</span>::{<span class="ident">DrawOptions</span>, <span class="ident">Renderable</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">DrawRoad</span> {
    <span class="kw">pub</span> <span class="ident">id</span>: <span class="ident">RoadID</span>,
    <span class="ident">zorder</span>: <span class="ident">isize</span>,

    <span class="ident">draw</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">pub</span> <span class="ident">lanes</span>: <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">DrawLane</span><span class="op">&gt;</span>,
}

<span class="kw">impl</span> <span class="ident">DrawRoad</span> {
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">r</span>: <span class="kw-2">&amp;</span><span class="ident">Road</span>) -&gt; <span class="ident">DrawRoad</span> {
        <span class="ident">DrawRoad</span> {
            <span class="ident">id</span>: <span class="ident">r</span>.<span class="ident">id</span>,
            <span class="ident">zorder</span>: <span class="ident">r</span>.<span class="ident">zorder</span>,
            <span class="ident">draw</span>: <span class="ident">RefCell::new</span>(<span class="prelude-val">None</span>),
            <span class="ident">lanes</span>: <span class="ident">r</span>.<span class="ident">lanes</span>.<span class="ident">iter</span>().<span class="ident">map</span>(<span class="op">|</span><span class="ident">l</span><span class="op">|</span> <span class="ident">DrawLane::new</span>(<span class="ident">l</span>, <span class="ident">r</span>)).<span class="ident">collect</span>(),
        }
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">render_center_line</span>(<span class="kw-2">&amp;</span><span class="self">self</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">GeomBatch</span> {
        <span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">app</span>.<span class="ident">map</span>().<span class="ident">get_r</span>(<span class="self">self</span>.<span class="ident">id</span>);
        <span class="kw">let</span> <span class="ident">center_line_color</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">r</span>.<span class="ident">is_private</span>() <span class="op">&amp;&amp;</span> <span class="ident">app</span>.<span class="ident">cs</span>().<span class="ident">private_road</span>.<span class="ident">is_some</span>() {
            <span class="ident">app</span>.<span class="ident">cs</span>()
                .<span class="ident">road_center_line</span>
                .<span class="ident">lerp</span>(<span class="ident">app</span>.<span class="ident">cs</span>().<span class="ident">private_road</span>.<span class="ident">unwrap</span>(), <span class="number">0.5</span>)
        } <span class="kw">else</span> {
            <span class="ident">app</span>.<span class="ident">cs</span>().<span class="ident">road_center_line</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::new</span>();

        <span class="comment">// Draw a center line every time two driving/bike/bus lanes of opposite direction are</span>
        <span class="comment">// adjacent.</span>
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">width</span> <span class="op">=</span> <span class="ident">Distance::ZERO</span>;
        <span class="kw">for</span> <span class="ident">pair</span> <span class="kw">in</span> <span class="ident">r</span>.<span class="ident">lanes</span>.<span class="ident">windows</span>(<span class="number">2</span>) {
            <span class="ident">width</span> <span class="op">+</span><span class="op">=</span> <span class="ident">pair</span>[<span class="number">0</span>].<span class="ident">width</span>;
            <span class="kw">if</span> <span class="ident">pair</span>[<span class="number">0</span>].<span class="ident">dir</span> <span class="op">!</span><span class="op">=</span> <span class="ident">pair</span>[<span class="number">1</span>].<span class="ident">dir</span>
                <span class="op">&amp;&amp;</span> <span class="ident">pair</span>[<span class="number">0</span>].<span class="ident">lane_type</span>.<span class="ident">is_for_moving_vehicles</span>()
                <span class="op">&amp;&amp;</span> <span class="ident">pair</span>[<span class="number">1</span>].<span class="ident">lane_type</span>.<span class="ident">is_for_moving_vehicles</span>()
            {
                <span class="kw">let</span> <span class="ident">pl</span> <span class="op">=</span> <span class="ident">r</span>.<span class="ident">shift_from_left_side</span>(<span class="ident">width</span>).<span class="ident">unwrap</span>();
                <span class="ident">batch</span>.<span class="ident">extend</span>(
                    <span class="ident">center_line_color</span>,
                    <span class="ident">pl</span>.<span class="ident">dashed_lines</span>(
                        <span class="ident">Distance::meters</span>(<span class="number">0.25</span>),
                        <span class="ident">Distance::meters</span>(<span class="number">2.0</span>),
                        <span class="ident">Distance::meters</span>(<span class="number">1.0</span>),
                    ),
                );
            }
        }

        <span class="ident">batch</span>
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">render</span><span class="op">&lt;</span><span class="ident">P</span>: <span class="ident">AsRef</span><span class="op">&lt;</span><span class="ident">Prerender</span><span class="op">&gt;</span><span class="op">&gt;</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">prerender</span>: <span class="kw-2">&amp;</span><span class="ident">P</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">GeomBatch</span> {
        <span class="kw">let</span> <span class="ident">prerender</span> <span class="op">=</span> <span class="ident">prerender</span>.<span class="ident">as_ref</span>();
        <span class="kw">let</span> <span class="ident">r</span> <span class="op">=</span> <span class="ident">app</span>.<span class="ident">map</span>().<span class="ident">get_r</span>(<span class="self">self</span>.<span class="ident">id</span>);
        <span class="kw">let</span> <span class="ident">center_line_color</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">r</span>.<span class="ident">is_private</span>() <span class="op">&amp;&amp;</span> <span class="ident">app</span>.<span class="ident">cs</span>().<span class="ident">private_road</span>.<span class="ident">is_some</span>() {
            <span class="ident">app</span>.<span class="ident">cs</span>()
                .<span class="ident">road_center_line</span>
                .<span class="ident">lerp</span>(<span class="ident">app</span>.<span class="ident">cs</span>().<span class="ident">private_road</span>.<span class="ident">unwrap</span>(), <span class="number">0.5</span>)
        } <span class="kw">else</span> {
            <span class="ident">app</span>.<span class="ident">cs</span>().<span class="ident">road_center_line</span>
        };

        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">batch</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">render_center_line</span>(<span class="ident">app</span>);

        <span class="comment">// Draw the label</span>
        <span class="kw">if</span> <span class="op">!</span><span class="ident">r</span>.<span class="ident">is_light_rail</span>() {
            <span class="kw">let</span> <span class="ident">name</span> <span class="op">=</span> <span class="ident">r</span>.<span class="ident">get_name</span>(<span class="ident">app</span>.<span class="ident">opts</span>().<span class="ident">language</span>.<span class="ident">as_ref</span>());
            <span class="kw">if</span> <span class="ident">r</span>.<span class="ident">length</span>() <span class="op">&gt;</span><span class="op">=</span> <span class="ident">Distance::meters</span>(<span class="number">30.0</span>) <span class="op">&amp;&amp;</span> <span class="ident">name</span> <span class="op">!</span><span class="op">=</span> <span class="string">&quot;???&quot;</span> {
                <span class="comment">// TODO If it&#39;s definitely straddling bus/bike lanes, change the color? Or</span>
                <span class="comment">// even easier, just skip the center lines?</span>
                <span class="kw">let</span> <span class="ident">bg</span> <span class="op">=</span> <span class="kw">if</span> <span class="ident">r</span>.<span class="ident">is_private</span>() <span class="op">&amp;&amp;</span> <span class="ident">app</span>.<span class="ident">cs</span>().<span class="ident">private_road</span>.<span class="ident">is_some</span>() {
                    <span class="ident">app</span>.<span class="ident">cs</span>()
                        .<span class="ident">zoomed_road_surface</span>(<span class="ident">LaneType::Driving</span>, <span class="ident">r</span>.<span class="ident">get_rank</span>())
                        .<span class="ident">lerp</span>(<span class="ident">app</span>.<span class="ident">cs</span>().<span class="ident">private_road</span>.<span class="ident">unwrap</span>(), <span class="number">0.5</span>)
                } <span class="kw">else</span> {
                    <span class="ident">app</span>.<span class="ident">cs</span>()
                        .<span class="ident">zoomed_road_surface</span>(<span class="ident">LaneType::Driving</span>, <span class="ident">r</span>.<span class="ident">get_rank</span>())
                };

                <span class="kw">if</span> <span class="bool-val">false</span> {
                    <span class="comment">// TODO Not ready yet</span>
                    <span class="ident">batch</span>.<span class="ident">append</span>(<span class="ident">Line</span>(<span class="ident">name</span>).<span class="ident">fg</span>(<span class="ident">center_line_color</span>).<span class="ident">render_curvey</span>(
                        <span class="ident">prerender</span>,
                        <span class="kw-2">&amp;</span><span class="ident">r</span>.<span class="ident">center_pts</span>,
                        <span class="number">0.1</span>,
                    ));
                } <span class="kw">else</span> {
                    <span class="kw">let</span> <span class="ident">txt</span> <span class="op">=</span> <span class="ident">Text::from</span>(<span class="ident">Line</span>(<span class="ident">name</span>).<span class="ident">fg</span>(<span class="ident">center_line_color</span>)).<span class="ident">bg</span>(<span class="ident">bg</span>);
                    <span class="kw">let</span> (<span class="ident">pt</span>, <span class="ident">angle</span>) <span class="op">=</span> <span class="ident">r</span>.<span class="ident">center_pts</span>.<span class="ident">must_dist_along</span>(<span class="ident">r</span>.<span class="ident">length</span>() <span class="op">/</span> <span class="number">2.0</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">prerender</span>)
                            .<span class="ident">scale</span>(<span class="number">0.1</span>)
                            .<span class="ident">centered_on</span>(<span class="ident">pt</span>)
                            .<span class="ident">rotate_around_batch_center</span>(<span class="ident">angle</span>.<span class="ident">reorient</span>()),
                    );
                }
            }
        }

        <span class="comment">// Driveways of connected buildings. These are grouped by road to limit what has to be</span>
        <span class="comment">// recalculated when road edits cause buildings to re-snap.</span>
        <span class="kw">for</span> <span class="ident">b</span> <span class="kw">in</span> <span class="ident">app</span>.<span class="ident">map</span>().<span class="ident">road_to_buildings</span>(<span class="self">self</span>.<span class="ident">id</span>) {
            <span class="ident">draw_building_driveway</span>(<span class="ident">app</span>, <span class="ident">app</span>.<span class="ident">map</span>().<span class="ident">get_b</span>(<span class="kw-2">*</span><span class="ident">b</span>), <span class="kw-2">&amp;mut</span> <span class="ident">batch</span>);
        }

        <span class="ident">batch</span>
    }

    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">clear_rendering</span>(<span class="kw-2">&amp;mut</span> <span class="self">self</span>) {
        <span class="kw-2">*</span><span class="self">self</span>.<span class="ident">draw</span>.<span class="ident">borrow_mut</span>() <span class="op">=</span> <span class="prelude-val">None</span>;
        <span class="kw">for</span> <span class="ident">l</span> <span class="kw">in</span> <span class="kw-2">&amp;mut</span> <span class="self">self</span>.<span class="ident">lanes</span> {
            <span class="ident">l</span>.<span class="ident">clear_rendering</span>();
        }
    }
}

<span class="kw">impl</span> <span class="ident">Renderable</span> <span class="kw">for</span> <span class="ident">DrawRoad</span> {
    <span class="kw">fn</span> <span class="ident">get_id</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="ident">ID</span> {
        <span class="ident">ID::Road</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;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="kw">_</span>: <span class="kw-2">&amp;</span><span class="ident">DrawOptions</span>) {
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">draw</span> <span class="op">=</span> <span class="self">self</span>.<span class="ident">draw</span>.<span class="ident">borrow_mut</span>();
        <span class="kw">if</span> <span class="ident">draw</span>.<span class="ident">is_none</span>() {
            <span class="kw-2">*</span><span class="ident">draw</span> <span class="op">=</span> <span class="prelude-val">Some</span>(<span class="ident">g</span>.<span class="ident">upload</span>(<span class="self">self</span>.<span class="ident">render</span>(<span class="ident">g</span>, <span class="ident">app</span>)));
        }
        <span class="ident">g</span>.<span class="ident">redraw</span>(<span class="ident">draw</span>.<span class="ident">as_ref</span>().<span class="ident">unwrap</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>) -&gt; <span class="ident">Polygon</span> {
        <span class="comment">// Highlight the entire thing, not just an outline</span>
        <span class="ident">map</span>.<span class="ident">get_r</span>(<span class="self">self</span>.<span class="ident">id</span>).<span class="ident">get_thick_polygon</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>) -&gt; <span class="ident">bool</span> {
        <span class="ident">map</span>.<span class="ident">get_r</span>(<span class="self">self</span>.<span class="ident">id</span>).<span class="ident">get_thick_polygon</span>().<span class="ident">contains_pt</span>(<span class="ident">pt</span>)
    }

    <span class="kw">fn</span> <span class="ident">get_zorder</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="ident">isize</span> {
        <span class="self">self</span>.<span class="ident">zorder</span>
    }
}

<span class="kw">fn</span> <span class="ident">draw_building_driveway</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">bldg</span>: <span class="kw-2">&amp;</span><span class="ident">Building</span>, <span class="ident">batch</span>: <span class="kw-2">&amp;mut</span> <span class="ident">GeomBatch</span>) {
    <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">opts</span>().<span class="ident">camera_angle</span> <span class="op">==</span> <span class="ident">CameraAngle::Abstract</span> <span class="op">|</span><span class="op">|</span> <span class="op">!</span><span class="ident">app</span>.<span class="ident">opts</span>().<span class="ident">show_building_driveways</span> {
        <span class="kw">return</span>;
    }

    <span class="comment">// Trim the driveway away from the sidewalk&#39;s center line, so that it doesn&#39;t overlap.  For</span>
    <span class="comment">// now, this cleanup is visual; it doesn&#39;t belong in the map_model 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::ZERO</span>,
            <span class="ident">orig_pl</span>.<span class="ident">length</span>() <span class="op">-</span> <span class="ident">app</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="kw">if</span> <span class="ident">driveway</span>.<span class="ident">length</span>() <span class="op">&gt;</span> <span class="ident">Distance::meters</span>(<span class="number">0.1</span>) {
        <span class="ident">batch</span>.<span class="ident">push</span>(
            <span class="kw">if</span> <span class="ident">app</span>.<span class="ident">opts</span>().<span class="ident">color_scheme</span> <span class="op">==</span> <span class="ident">ColorSchemeChoice::NightMode</span> {
                <span class="ident">Color::hex</span>(<span class="string">&quot;#4B4B4B&quot;</span>)
            } <span class="kw">else</span> {
                <span class="ident">app</span>.<span class="ident">cs</span>().<span class="ident">zoomed_road_surface</span>(
                    <span class="ident">LaneType::Sidewalk</span>,
                    <span class="ident">app</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>),
        );
    }
}
</code></pre></div>
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