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class="rust"><code><span class="attribute">#![<span class="ident">allow</span>(<span class="ident">clippy::new_without_default</span>)]</span> <span class="attribute">#[<span class="ident">macro_use</span>]</span> <span class="kw">extern</span> <span class="kw">crate</span> <span class="ident">anyhow</span>; <span class="kw">use</span> <span class="ident">serde</span>::{<span class="ident">Deserialize</span>, <span class="ident">Deserializer</span>, <span class="ident">Serialize</span>, <span class="ident">Serializer</span>}; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::angle::Angle</span>; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::bounds</span>::{<span class="ident">Bounds</span>, <span class="ident">GPSBounds</span>}; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::circle::Circle</span>; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::distance::Distance</span>; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::duration::Duration</span>; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::find_closest::FindClosest</span>; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::gps::LonLat</span>; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::line</span>::{<span class="ident">InfiniteLine</span>, <span class="ident">Line</span>}; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::percent::Percent</span>; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::polygon</span>::{<span class="ident">Polygon</span>, <span class="ident">Triangle</span>}; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::polyline</span>::{<span class="ident">ArrowCap</span>, <span class="ident">PolyLine</span>}; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::pt</span>::{<span class="ident">HashablePt2D</span>, <span class="ident">Pt2D</span>}; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::ring::Ring</span>; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::speed::Speed</span>; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::stats</span>::{<span class="ident">HgramValue</span>, <span class="ident">Histogram</span>, <span class="ident">Statistic</span>}; <span class="kw">pub</span> <span class="kw">use</span> <span class="ident"><span class="kw">crate</span>::time::Time</span>; <span class="kw">mod</span> <span class="ident">angle</span>; <span class="kw">mod</span> <span class="ident">bounds</span>; <span class="kw">mod</span> <span class="ident">circle</span>; <span class="kw">mod</span> <span class="ident">conversions</span>; <span class="kw">mod</span> <span class="ident">distance</span>; <span class="kw">mod</span> <span class="ident">duration</span>; <span class="kw">mod</span> <span class="ident">find_closest</span>; <span class="kw">mod</span> <span class="ident">gps</span>; <span class="kw">mod</span> <span class="ident">line</span>; <span class="kw">mod</span> <span class="ident">percent</span>; <span class="kw">mod</span> <span class="ident">polygon</span>; <span class="kw">mod</span> <span class="ident">polyline</span>; <span class="kw">mod</span> <span class="ident">pt</span>; <span class="kw">mod</span> <span class="ident">ring</span>; <span class="kw">mod</span> <span class="ident">speed</span>; <span class="kw">mod</span> <span class="ident">stats</span>; <span class="kw">mod</span> <span class="ident">time</span>; <span class="comment">// About 0.4 inches... which is quite tiny on the scale of things. :)</span> <span class="kw">pub</span> <span class="kw">const</span> <span class="ident">EPSILON_DIST</span>: <span class="ident">Distance</span> <span class="op">=</span> <span class="ident">Distance::const_meters</span>(<span class="number">0.01</span>); <span class="doccomment">/// Reduce the precision of an f64. This helps ensure serialization is idempotent (everything is</span> <span class="doccomment">/// exacly the same before and after saving/loading). Ideally we'd use some kind of proper</span> <span class="doccomment">/// fixed-precision type instead of f64.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">trim_f64</span>(<span class="ident">x</span>: <span class="ident">f64</span>) -> <span class="ident">f64</span> { (<span class="ident">x</span> <span class="op">*</span> <span class="number">10_000.0</span>).<span class="ident">round</span>() <span class="op">/</span> <span class="number">10_000.0</span> } <span class="doccomment">/// Serializes a trimmed `f64` as an `i32` to save space.</span> <span class="kw">fn</span> <span class="ident">serialize_f64</span><span class="op"><</span><span class="ident">S</span>: <span class="ident">Serializer</span><span class="op">></span>(<span class="ident">x</span>: <span class="kw-2">&</span><span class="ident">f64</span>, <span class="ident">s</span>: <span class="ident">S</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">S::Ok</span>, <span class="ident">S::Error</span><span class="op">></span> { <span class="comment">// So a trimmed f64's range becomes 2**31 / 10,000 =~ 214,000, which is plenty</span> <span class="comment">// We don't need to round() here; trim_f64 already handles that.</span> <span class="kw">let</span> <span class="ident">int</span> <span class="op">=</span> (<span class="ident">x</span> <span class="op">*</span> <span class="number">10_000.0</span>) <span class="kw">as</span> <span class="ident">i32</span>; <span class="ident">int</span>.<span class="ident">serialize</span>(<span class="ident">s</span>) } <span class="doccomment">/// Deserializes a trimmed `f64` from an `i32`.</span> <span class="kw">fn</span> <span class="ident">deserialize_f64</span><span class="op"><</span><span class="lifetime">'de</span>, <span class="ident">D</span>: <span class="ident">Deserializer</span><span class="op"><</span><span class="lifetime">'de</span><span class="op">></span><span class="op">></span>(<span class="ident">d</span>: <span class="ident">D</span>) -> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">f64</span>, <span class="ident">D::Error</span><span class="op">></span> { <span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> <span class="op"><</span><span class="ident">i32</span><span class="op">></span><span class="ident">::deserialize</span>(<span class="ident">d</span>)<span class="question-mark">?</span>; <span class="prelude-val">Ok</span>(<span class="ident">x</span> <span class="kw">as</span> <span class="ident">f64</span> <span class="op">/</span> <span class="number">10_000.0</span>) } <span class="doccomment">/// Specifies how to stringify different geom objects.</span> <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>, <span class="ident">Copy</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">UnitFmt</span> { <span class="doccomment">/// Round `Duration`s to a whole number of seconds.</span> <span class="kw">pub</span> <span class="ident">round_durations</span>: <span class="ident">bool</span>, <span class="doccomment">/// Display in metric; US imperial otherwise.</span> <span class="kw">pub</span> <span class="ident">metric</span>: <span class="ident">bool</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> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">CornerRadii</span> { <span class="kw">pub</span> <span class="ident">top_left</span>: <span class="ident">f64</span>, <span class="kw">pub</span> <span class="ident">top_right</span>: <span class="ident">f64</span>, <span class="kw">pub</span> <span class="ident">bottom_right</span>: <span class="ident">f64</span>, <span class="kw">pub</span> <span class="ident">bottom_left</span>: <span class="ident">f64</span>, } <span class="kw">impl</span> <span class="ident">CornerRadii</span> { <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">uniform</span>(<span class="ident">radius</span>: <span class="ident">f64</span>) -> <span class="self">Self</span> { <span class="self">Self</span> { <span class="ident">top_left</span>: <span class="ident">radius</span>, <span class="ident">top_right</span>: <span class="ident">radius</span>, <span class="ident">bottom_right</span>: <span class="ident">radius</span>, <span class="ident">bottom_left</span>: <span class="ident">radius</span>, } } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">zero</span>() -> <span class="self">Self</span> { <span class="ident"><span class="self">Self</span>::uniform</span>(<span class="number">0.0</span>) } } <span class="kw">impl</span> <span class="ident">std::convert::From</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span> <span class="kw">for</span> <span class="ident">CornerRadii</span> { <span class="kw">fn</span> <span class="ident">from</span>(<span class="ident">uniform</span>: <span class="ident">f64</span>) -> <span class="self">Self</span> { <span class="ident"><span class="self">Self</span>::uniform</span>(<span class="ident">uniform</span>) } } <span class="kw">impl</span> <span class="ident">Default</span> <span class="kw">for</span> <span class="ident">CornerRadii</span> { <span class="kw">fn</span> <span class="ident">default</span>() -> <span class="self">Self</span> { <span class="ident"><span class="self">Self</span>::zero</span>() } } <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">test</span>)]</span> <span class="kw">mod</span> <span class="ident">tests</span> { <span class="kw">use</span> <span class="kw">super</span>::<span class="kw-2">*</span>; <span class="kw">use</span> <span class="ident">rand</span>::{<span class="ident">Rng</span>, <span class="ident">SeedableRng</span>}; <span class="attribute">#[<span class="ident">test</span>]</span> <span class="kw">fn</span> <span class="ident">f64_trimming</span>() { <span class="comment">// Roundtrip a bunch of random f64's</span> <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">rng</span> <span class="op">=</span> <span class="ident">rand_xorshift::XorShiftRng::seed_from_u64</span>(<span class="number">42</span>); <span class="kw">for</span> <span class="kw">_</span> <span class="kw">in</span> <span class="number">0</span>..<span class="number">1_000</span> { <span class="kw">let</span> <span class="ident">input</span> <span class="op">=</span> <span class="ident">rng</span>.<span class="ident">gen_range</span>(<span class="op">-</span><span class="number">214_000.00</span>..<span class="number">214_000.0</span>); <span class="kw">let</span> <span class="ident">trimmed</span> <span class="op">=</span> <span class="ident">trim_f64</span>(<span class="ident">input</span>); <span class="kw">let</span> <span class="ident">json_roundtrip</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="ident">abstutil::from_json</span>(<span class="ident">abstutil::to_json</span>(<span class="kw-2">&</span><span class="ident">trimmed</span>).<span class="ident">as_bytes</span>()).<span class="ident">unwrap</span>(); <span class="kw">let</span> <span class="ident">bincode_roundtrip</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="ident">abstutil::from_binary</span>(<span class="kw-2">&</span><span class="ident">abstutil::to_binary</span>(<span class="kw-2">&</span><span class="ident">trimmed</span>)).<span class="ident">unwrap</span>(); <span class="macro">assert_eq!</span>(<span class="ident">json_roundtrip</span>, <span class="ident">trimmed</span>); <span class="macro">assert_eq!</span>(<span class="ident">bincode_roundtrip</span>, <span class="ident">trimmed</span>); } <span class="comment">// Hardcode a particular case, where we can hand-verify that it trims to 4 decimal places</span> <span class="kw">let</span> <span class="ident">input</span> <span class="op">=</span> <span class="number">1.2345678</span>; <span class="kw">let</span> <span class="ident">trimmed</span> <span class="op">=</span> <span class="ident">trim_f64</span>(<span class="ident">input</span>); <span class="kw">let</span> <span class="ident">json_roundtrip</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="ident">abstutil::from_json</span>(<span class="ident">abstutil::to_json</span>(<span class="kw-2">&</span><span class="ident">trimmed</span>).<span class="ident">as_bytes</span>()).<span class="ident">unwrap</span>(); <span class="kw">let</span> <span class="ident">bincode_roundtrip</span>: <span class="ident">f64</span> <span class="op">=</span> <span class="ident">abstutil::from_binary</span>(<span class="kw-2">&</span><span class="ident">abstutil::to_binary</span>(<span class="kw-2">&</span><span class="ident">trimmed</span>)).<span class="ident">unwrap</span>(); <span class="macro">assert_eq!</span>(<span class="ident">json_roundtrip</span>, <span class="number">1.2346</span>); <span class="macro">assert_eq!</span>(<span class="ident">bincode_roundtrip</span>, <span class="number">1.2346</span>); } } </code></pre></div> </section><section id="search" class="content hidden"></section></div></main><div id="rustdoc-vars" data-root-path="../../" data-current-crate="geom" data-themes="ayu,dark,light" data-resource-suffix="" data-rustdoc-version="1.61.0 (fe5b13d68 2022-05-18)" ></div> </body></html>