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id="192">192</span> <span id="193">193</span> </pre><div class="example-wrap"><pre class="rust "> <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">fmt</span>; <span class="kw">use</span> <span class="ident">ordered_float</span>::<span class="ident">NotNan</span>; <span class="kw">use</span> <span class="ident">serde</span>::{<span class="ident">Deserialize</span>, <span class="ident">Serialize</span>}; <span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">trim_f64</span>, <span class="ident">Angle</span>, <span class="ident">Distance</span>, <span class="ident">GPSBounds</span>, <span class="ident">LonLat</span>, <span class="ident">EPSILON_DIST</span>}; <span class="doccomment">/// This represents world-space in meters.</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">Serialize</span>, <span class="ident">Deserialize</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">Pt2D</span> { <span class="ident">inner_x</span>: <span class="ident">f64</span>, <span class="ident">inner_y</span>: <span class="ident">f64</span>, } <span class="kw">impl</span> <span class="ident">std</span>::<span class="ident">cmp</span>::<span class="ident">PartialEq</span> <span class="kw">for</span> <span class="ident">Pt2D</span> { <span class="kw">fn</span> <span class="ident">eq</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">other</span>: <span class="kw-2">&</span><span class="ident">Pt2D</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">approx_eq</span>(<span class="kw-2">*</span><span class="ident">other</span>, <span class="ident">EPSILON_DIST</span>) } } <span class="kw">impl</span> <span class="ident">Pt2D</span> { <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">x</span>: <span class="ident">f64</span>, <span class="ident">y</span>: <span class="ident">f64</span>) <span class="op">-></span> <span class="ident">Pt2D</span> { <span class="kw">if</span> <span class="op">!</span><span class="ident">x</span>.<span class="ident">is_finite</span>() <span class="op">||</span> <span class="op">!</span><span class="ident">y</span>.<span class="ident">is_finite</span>() { <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Bad Pt2D {}, {}"</span>, <span class="ident">x</span>, <span class="ident">y</span>); } <span class="comment">// TODO enforce >=0</span> <span class="ident">Pt2D</span> { <span class="ident">inner_x</span>: <span class="ident">trim_f64</span>(<span class="ident">x</span>), <span class="ident">inner_y</span>: <span class="ident">trim_f64</span>(<span class="ident">y</span>), } } <span class="comment">// TODO This is a small first step...</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">approx_eq</span>(<span class="self">self</span>, <span class="ident">other</span>: <span class="ident">Pt2D</span>, <span class="ident">threshold</span>: <span class="ident">Distance</span>) <span class="op">-></span> <span class="ident">bool</span> { <span class="self">self</span>.<span class="ident">dist_to</span>(<span class="ident">other</span>) <span class="op"><=</span> <span class="ident">threshold</span> } <span class="doccomment">/// Can go out of bounds.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_gps</span>(<span class="ident">gps</span>: <span class="ident">LonLat</span>, <span class="ident">b</span>: <span class="kw-2">&</span><span class="ident">GPSBounds</span>) <span class="op">-></span> <span class="ident">Pt2D</span> { <span class="kw">let</span> (<span class="ident">width</span>, <span class="ident">height</span>) <span class="op">=</span> { <span class="kw">let</span> <span class="ident">pt</span> <span class="op">=</span> <span class="ident">b</span>.<span class="ident">get_max_world_pt</span>(); (<span class="ident">pt</span>.<span class="ident">x</span>(), <span class="ident">pt</span>.<span class="ident">y</span>()) }; <span class="kw">let</span> <span class="ident">x</span> <span class="op">=</span> (<span class="ident">gps</span>.<span class="ident">x</span>() <span class="op">-</span> <span class="ident">b</span>.<span class="ident">min_lon</span>) <span class="op">/</span> (<span class="ident">b</span>.<span class="ident">max_lon</span> <span class="op">-</span> <span class="ident">b</span>.<span class="ident">min_lon</span>) <span class="op">*</span> <span class="ident">width</span>; <span class="comment">// Invert y, so that the northernmost latitude is 0. Screen drawing order, not Cartesian</span> <span class="comment">// grid.</span> <span class="kw">let</span> <span class="ident">y</span> <span class="op">=</span> <span class="ident">height</span> <span class="op">-</span> ((<span class="ident">gps</span>.<span class="ident">y</span>() <span class="op">-</span> <span class="ident">b</span>.<span class="ident">min_lat</span>) <span class="op">/</span> (<span class="ident">b</span>.<span class="ident">max_lat</span> <span class="op">-</span> <span class="ident">b</span>.<span class="ident">min_lat</span>) <span class="op">*</span> <span class="ident">height</span>); <span class="ident">Pt2D</span>::<span class="ident">new</span>(<span class="ident">x</span>, <span class="ident">y</span>) } <span class="doccomment">/// Can go out of bounds.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_gps</span>(<span class="self">self</span>, <span class="ident">b</span>: <span class="kw-2">&</span><span class="ident">GPSBounds</span>) <span class="op">-></span> <span class="ident">LonLat</span> { <span class="kw">let</span> (<span class="ident">width</span>, <span class="ident">height</span>) <span class="op">=</span> { <span class="kw">let</span> <span class="ident">pt</span> <span class="op">=</span> <span class="ident">b</span>.<span class="ident">get_max_world_pt</span>(); (<span class="ident">pt</span>.<span class="ident">x</span>(), <span class="ident">pt</span>.<span class="ident">y</span>()) }; <span class="kw">let</span> <span class="ident">lon</span> <span class="op">=</span> (<span class="self">self</span>.<span class="ident">x</span>() <span class="op">/</span> <span class="ident">width</span> <span class="op">*</span> (<span class="ident">b</span>.<span class="ident">max_lon</span> <span class="op">-</span> <span class="ident">b</span>.<span class="ident">min_lon</span>)) <span class="op">+</span> <span class="ident">b</span>.<span class="ident">min_lon</span>; <span class="kw">let</span> <span class="ident">lat</span> <span class="op">=</span> <span class="ident">b</span>.<span class="ident">min_lat</span> <span class="op">+</span> ((<span class="ident">b</span>.<span class="ident">max_lat</span> <span class="op">-</span> <span class="ident">b</span>.<span class="ident">min_lat</span>) <span class="op">*</span> (<span class="ident">height</span> <span class="op">-</span> <span class="self">self</span>.<span class="ident">y</span>()) <span class="op">/</span> <span class="ident">height</span>); <span class="ident">LonLat</span>::<span class="ident">new</span>(<span class="ident">lon</span>, <span class="ident">lat</span>) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">x</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">f64</span> { <span class="self">self</span>.<span class="ident">inner_x</span> } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">y</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">f64</span> { <span class="self">self</span>.<span class="ident">inner_y</span> } <span class="comment">// TODO better name</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">project_away</span>(<span class="self">self</span>, <span class="ident">dist</span>: <span class="ident">Distance</span>, <span class="ident">theta</span>: <span class="ident">Angle</span>) <span class="op">-></span> <span class="ident">Pt2D</span> { <span class="comment">// If negative, caller should use theta.opposite()</span> <span class="macro">assert</span><span class="macro">!</span>(<span class="ident">dist</span> <span class="op">>=</span> <span class="ident">Distance</span>::<span class="ident">ZERO</span>); <span class="kw">let</span> (<span class="ident">sin</span>, <span class="ident">cos</span>) <span class="op">=</span> <span class="ident">theta</span>.<span class="ident">normalized_radians</span>().<span class="ident">sin_cos</span>(); <span class="ident">Pt2D</span>::<span class="ident">new</span>( <span class="self">self</span>.<span class="ident">x</span>() <span class="op">+</span> <span class="ident">dist</span>.<span class="ident">inner_meters</span>() <span class="op">*</span> <span class="ident">cos</span>, <span class="self">self</span>.<span class="ident">y</span>() <span class="op">+</span> <span class="ident">dist</span>.<span class="ident">inner_meters</span>() <span class="op">*</span> <span class="ident">sin</span>, ) } <span class="comment">// TODO valid to do euclidean distance on world-space points that're formed from</span> <span class="comment">// Haversine?</span> <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">fn</span> <span class="ident">raw_dist_to</span>(<span class="self">self</span>, <span class="ident">to</span>: <span class="ident">Pt2D</span>) <span class="op">-></span> <span class="ident">f64</span> { ((<span class="self">self</span>.<span class="ident">x</span>() <span class="op">-</span> <span class="ident">to</span>.<span class="ident">x</span>()).<span class="ident">powi</span>(<span class="number">2</span>) <span class="op">+</span> (<span class="self">self</span>.<span class="ident">y</span>() <span class="op">-</span> <span class="ident">to</span>.<span class="ident">y</span>()).<span class="ident">powi</span>(<span class="number">2</span>)).<span class="ident">sqrt</span>() } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">dist_to</span>(<span class="self">self</span>, <span class="ident">to</span>: <span class="ident">Pt2D</span>) <span class="op">-></span> <span class="ident">Distance</span> { <span class="ident">Distance</span>::<span class="ident">meters</span>(<span class="self">self</span>.<span class="ident">raw_dist_to</span>(<span class="ident">to</span>)) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">angle_to</span>(<span class="self">self</span>, <span class="ident">to</span>: <span class="ident">Pt2D</span>) <span class="op">-></span> <span class="ident">Angle</span> { <span class="comment">// DON'T invert y here</span> <span class="ident">Angle</span>::<span class="ident">new_rads</span>((<span class="ident">to</span>.<span class="ident">y</span>() <span class="op">-</span> <span class="self">self</span>.<span class="ident">y</span>()).<span class="ident">atan2</span>(<span class="ident">to</span>.<span class="ident">x</span>() <span class="op">-</span> <span class="self">self</span>.<span class="ident">x</span>())) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">offset</span>(<span class="self">self</span>, <span class="ident">dx</span>: <span class="ident">f64</span>, <span class="ident">dy</span>: <span class="ident">f64</span>) <span class="op">-></span> <span class="ident">Pt2D</span> { <span class="ident">Pt2D</span>::<span class="ident">new</span>(<span class="self">self</span>.<span class="ident">x</span>() <span class="op">+</span> <span class="ident">dx</span>, <span class="self">self</span>.<span class="ident">y</span>() <span class="op">+</span> <span class="ident">dy</span>) } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">center</span>(<span class="ident">pts</span>: <span class="kw-2">&</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">Pt2D</span><span class="op">></span>) <span class="op">-></span> <span class="ident">Pt2D</span> { <span class="kw">if</span> <span class="ident">pts</span>.<span class="ident">is_empty</span>() { <span class="macro">panic</span><span class="macro">!</span>(<span class="string">"Can't find center of 0 points"</span>); } <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">x</span> <span class="op">=</span> <span class="number">0.0</span>; <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">y</span> <span class="op">=</span> <span class="number">0.0</span>; <span class="kw">for</span> <span class="ident">pt</span> <span class="kw">in</span> <span class="ident">pts</span> { <span class="ident">x</span> <span class="op">+=</span> <span class="ident">pt</span>.<span class="ident">x</span>(); <span class="ident">y</span> <span class="op">+=</span> <span class="ident">pt</span>.<span class="ident">y</span>(); } <span class="kw">let</span> <span class="ident">len</span> <span class="op">=</span> <span class="ident">pts</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">f64</span>; <span class="ident">Pt2D</span>::<span class="ident">new</span>(<span class="ident">x</span> <span class="op">/</span> <span class="ident">len</span>, <span class="ident">y</span> <span class="op">/</span> <span class="ident">len</span>) } <span class="comment">// Temporary until Pt2D has proper resolution.</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">approx_dedupe</span>(<span class="ident">pts</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Pt2D</span><span class="op">></span>, <span class="ident">threshold</span>: <span class="ident">Distance</span>) <span class="op">-></span> <span class="ident">Vec</span><span class="op"><</span><span class="ident">Pt2D</span><span class="op">></span> { <span class="comment">// Just use dedup() on the Vec.</span> <span class="macro">assert_ne</span><span class="macro">!</span>(<span class="ident">threshold</span>, <span class="ident">EPSILON_DIST</span>); <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">result</span>: <span class="ident">Vec</span><span class="op"><</span><span class="ident">Pt2D</span><span class="op">></span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>(); <span class="kw">for</span> <span class="ident">pt</span> <span class="kw">in</span> <span class="ident">pts</span> { <span class="kw">if</span> <span class="ident">result</span>.<span class="ident">is_empty</span>() <span class="op">||</span> <span class="op">!</span><span class="ident">result</span>.<span class="ident">last</span>().<span class="ident">unwrap</span>().<span class="ident">approx_eq</span>(<span class="ident">pt</span>, <span class="ident">threshold</span>) { <span class="ident">result</span>.<span class="ident">push</span>(<span class="ident">pt</span>); } } <span class="ident">result</span> } <span class="comment">// TODO Try to deprecate in favor of Ring::get_shorter_slice_btwn</span> <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">find_pts_between</span>( <span class="ident">pts</span>: <span class="kw-2">&</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">Pt2D</span><span class="op">></span>, <span class="ident">start</span>: <span class="ident">Pt2D</span>, <span class="ident">end</span>: <span class="ident">Pt2D</span>, <span class="ident">threshold</span>: <span class="ident">Distance</span>, ) <span class="op">-></span> <span class="prelude-ty">Option</span><span class="op"><</span><span class="ident">Vec</span><span class="op"><</span><span class="ident">Pt2D</span><span class="op">>></span> { <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">result</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>(); <span class="kw">for</span> <span class="ident">pt</span> <span class="kw">in</span> <span class="ident">pts</span> { <span class="kw">if</span> <span class="ident">result</span>.<span class="ident">is_empty</span>() <span class="op">&&</span> <span class="ident">pt</span>.<span class="ident">approx_eq</span>(<span class="ident">start</span>, <span class="ident">threshold</span>) { <span class="ident">result</span>.<span class="ident">push</span>(<span class="kw-2">*</span><span class="ident">pt</span>); } <span class="kw">else</span> <span class="kw">if</span> <span class="op">!</span><span class="ident">result</span>.<span class="ident">is_empty</span>() { <span class="ident">result</span>.<span class="ident">push</span>(<span class="kw-2">*</span><span class="ident">pt</span>); } <span class="comment">// start and end might be the same.</span> <span class="kw">if</span> <span class="op">!</span><span class="ident">result</span>.<span class="ident">is_empty</span>() <span class="op">&&</span> <span class="ident">pt</span>.<span class="ident">approx_eq</span>(<span class="ident">end</span>, <span class="ident">threshold</span>) { <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">result</span>); } } <span class="comment">// start wasn't in the list!</span> <span class="kw">if</span> <span class="ident">result</span>.<span class="ident">is_empty</span>() { <span class="kw">return</span> <span class="prelude-val">None</span>; } <span class="comment">// Go through again, looking for end</span> <span class="kw">for</span> <span class="ident">pt</span> <span class="kw">in</span> <span class="ident">pts</span> { <span class="ident">result</span>.<span class="ident">push</span>(<span class="kw-2">*</span><span class="ident">pt</span>); <span class="kw">if</span> <span class="ident">pt</span>.<span class="ident">approx_eq</span>(<span class="ident">end</span>, <span class="ident">threshold</span>) { <span class="kw">return</span> <span class="prelude-val">Some</span>(<span class="ident">result</span>); } } <span class="comment">// Didn't find end</span> <span class="prelude-val">None</span> } <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_hashable</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">HashablePt2D</span> { <span class="ident">HashablePt2D</span> { <span class="ident">x_nan</span>: <span class="ident">NotNan</span>::<span class="ident">new</span>(<span class="self">self</span>.<span class="ident">x</span>()).<span class="ident">unwrap</span>(), <span class="ident">y_nan</span>: <span class="ident">NotNan</span>::<span class="ident">new</span>(<span class="self">self</span>.<span class="ident">y</span>()).<span class="ident">unwrap</span>(), } } } <span class="kw">impl</span> <span class="ident">fmt</span>::<span class="ident">Display</span> <span class="kw">for</span> <span class="ident">Pt2D</span> { <span class="kw">fn</span> <span class="ident">fmt</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">f</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fmt</span>::<span class="ident">Formatter</span>) <span class="op">-></span> <span class="ident">fmt</span>::<span class="prelude-ty">Result</span> { <span class="macro">write</span><span class="macro">!</span>(<span class="ident">f</span>, <span class="string">"Pt2D({0}, {1})"</span>, <span class="self">self</span>.<span class="ident">x</span>(), <span class="self">self</span>.<span class="ident">y</span>()) } } <span class="doccomment">/// This represents world space, NOT LonLat.</span> <span class="comment">// TODO So rename it HashablePair or something</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">Eq</span>, <span class="ident">Hash</span>, <span class="ident">PartialEq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>)]</span> <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">HashablePt2D</span> { <span class="ident">x_nan</span>: <span class="ident">NotNan</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span>, <span class="ident">y_nan</span>: <span class="ident">NotNan</span><span class="op"><</span><span class="ident">f64</span><span class="op">></span>, } <span class="kw">impl</span> <span class="ident">HashablePt2D</span> { <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_pt2d</span>(<span class="self">self</span>) <span class="op">-></span> <span class="ident">Pt2D</span> { <span class="ident">Pt2D</span>::<span class="ident">new</span>(<span class="self">self</span>.<span class="ident">x_nan</span>.<span class="ident">into_inner</span>(), <span class="self">self</span>.<span class="ident">y_nan</span>.<span class="ident">into_inner</span>()) } } </pre></div> </section><section id="search" class="content hidden"></section><section class="footer"></section><script>window.rootPath = "../../";window.currentCrate = "geom";</script><script src="../../main.js"></script><script src="../../source-script.js"></script><script src="../../source-files.js"></script><script defer src="../../search-index.js"></script></body></html>