mirror of
https://github.com/a-b-street/abstreet.git
synced 2024-12-26 07:52:05 +03:00
314 lines
20 KiB
HTML
314 lines
20 KiB
HTML
<!DOCTYPE HTML>
|
|
<html lang="en" class="sidebar-visible no-js light">
|
|
<head>
|
|
<!-- Book generated using mdBook -->
|
|
<meta charset="UTF-8">
|
|
<title>API - A/B Street</title>
|
|
|
|
|
|
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
|
|
<meta name="description" content="">
|
|
<meta name="viewport" content="width=device-width, initial-scale=1">
|
|
<meta name="theme-color" content="#ffffff" />
|
|
|
|
<link rel="shortcut icon" href="../favicon.png">
|
|
<link rel="stylesheet" href="../css/variables.css">
|
|
<link rel="stylesheet" href="../css/general.css">
|
|
<link rel="stylesheet" href="../css/chrome.css">
|
|
<link rel="stylesheet" href="../css/print.css" media="print">
|
|
|
|
<!-- Fonts -->
|
|
<link rel="stylesheet" href="../FontAwesome/css/font-awesome.css">
|
|
<link href="https://fonts.googleapis.com/css?family=Open+Sans:300italic,400italic,600italic,700italic,800italic,400,300,600,700,800" rel="stylesheet" type="text/css">
|
|
<link href="https://fonts.googleapis.com/css?family=Source+Code+Pro:500" rel="stylesheet" type="text/css">
|
|
|
|
<!-- Highlight.js Stylesheets -->
|
|
<link rel="stylesheet" href="../highlight.css">
|
|
<link rel="stylesheet" href="../tomorrow-night.css">
|
|
<link rel="stylesheet" href="../ayu-highlight.css">
|
|
|
|
<!-- Custom theme stylesheets -->
|
|
|
|
|
|
|
|
</head>
|
|
<body>
|
|
<!-- Provide site root to javascript -->
|
|
<script type="text/javascript">
|
|
var path_to_root = "../";
|
|
var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "light" : "light";
|
|
</script>
|
|
|
|
<!-- Work around some values being stored in localStorage wrapped in quotes -->
|
|
<script type="text/javascript">
|
|
try {
|
|
var theme = localStorage.getItem('mdbook-theme');
|
|
var sidebar = localStorage.getItem('mdbook-sidebar');
|
|
|
|
if (theme.startsWith('"') && theme.endsWith('"')) {
|
|
localStorage.setItem('mdbook-theme', theme.slice(1, theme.length - 1));
|
|
}
|
|
|
|
if (sidebar.startsWith('"') && sidebar.endsWith('"')) {
|
|
localStorage.setItem('mdbook-sidebar', sidebar.slice(1, sidebar.length - 1));
|
|
}
|
|
} catch (e) { }
|
|
</script>
|
|
|
|
<!-- Set the theme before any content is loaded, prevents flash -->
|
|
<script type="text/javascript">
|
|
var theme;
|
|
try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { }
|
|
if (theme === null || theme === undefined) { theme = default_theme; }
|
|
var html = document.querySelector('html');
|
|
html.classList.remove('no-js')
|
|
html.classList.remove('light')
|
|
html.classList.add(theme);
|
|
html.classList.add('js');
|
|
</script>
|
|
|
|
<!-- Hide / unhide sidebar before it is displayed -->
|
|
<script type="text/javascript">
|
|
var html = document.querySelector('html');
|
|
var sidebar = 'hidden';
|
|
if (document.body.clientWidth >= 1080) {
|
|
try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { }
|
|
sidebar = sidebar || 'visible';
|
|
}
|
|
html.classList.remove('sidebar-visible');
|
|
html.classList.add("sidebar-" + sidebar);
|
|
</script>
|
|
|
|
<nav id="sidebar" class="sidebar" aria-label="Table of contents">
|
|
<div class="sidebar-scrollbox">
|
|
<ol class="chapter"><li class="chapter-item expanded "><a href="../index.html"><strong aria-hidden="true">1.</strong> Overview</a></li><li class="chapter-item expanded "><a href="../howto/index.html"><strong aria-hidden="true">2.</strong> Instructions</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../howto/map_parking.html"><strong aria-hidden="true">2.1.</strong> How to map on-street parking</a></li><li class="chapter-item expanded "><a href="../howto/new_city.html"><strong aria-hidden="true">2.2.</strong> Importing a new city</a></li></ol></li><li class="chapter-item expanded "><a href="../how_it_works.html"><strong aria-hidden="true">3.</strong> How it works</a></li><li class="chapter-item expanded "><a href="../case_studies/index.html"><strong aria-hidden="true">4.</strong> Case studies</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../case_studies/lake_wash.html"><strong aria-hidden="true">4.1.</strong> Lake Washington Blvd Stay Healthy Street</a></li><li class="chapter-item expanded "><a href="../case_studies/west_seattle.html"><strong aria-hidden="true">4.2.</strong> West Seattle mitigations</a></li><li class="spacer"></li></ol></li><li class="chapter-item expanded "><a href="../dev/index.html"><strong aria-hidden="true">5.</strong> Developer guide</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../dev/misc_tricks.html"><strong aria-hidden="true">5.1.</strong> Misc developer tricks</a></li><li class="chapter-item expanded "><a href="../dev/api.html" class="active"><strong aria-hidden="true">5.2.</strong> API</a></li><li class="chapter-item expanded "><a href="../dev/testing.html"><strong aria-hidden="true">5.3.</strong> Testing</a></li></ol></li><li class="chapter-item expanded "><a href="../map/index.html"><strong aria-hidden="true">6.</strong> Map model</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../map/importing/index.html"><strong aria-hidden="true">6.1.</strong> Importing</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../map/importing/convert_osm.html"><strong aria-hidden="true">6.1.1.</strong> convert_osm</a></li><li class="chapter-item expanded "><a href="../map/importing/geometry.html"><strong aria-hidden="true">6.1.2.</strong> Road/intersection geometry</a></li><li class="chapter-item expanded "><a href="../map/importing/rest.html"><strong aria-hidden="true">6.1.3.</strong> The rest</a></li></ol></li><li class="chapter-item expanded "><a href="../map/edits.html"><strong aria-hidden="true">6.2.</strong> Live edits</a></li><li class="chapter-item expanded "><a href="../map/misc.html"><strong aria-hidden="true">6.3.</strong> Misc</a></li></ol></li><li class="chapter-item expanded "><a href="../trafficsim/index.html"><strong aria-hidden="true">7.</strong> Traffic simulation</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../trafficsim/discrete_event.html"><strong aria-hidden="true">7.1.</strong> Discrete event simulation</a></li><li class="chapter-item expanded "><a href="../trafficsim/travel_demand.html"><strong aria-hidden="true">7.2.</strong> Travel demand</a></li><li class="chapter-item expanded "><a href="../trafficsim/gridlock.html"><strong aria-hidden="true">7.3.</strong> Gridlock</a></li><li class="chapter-item expanded "><a href="../trafficsim/trips.html"><strong aria-hidden="true">7.4.</strong> Multi-modal trips</a></li><li class="chapter-item expanded "><a href="../trafficsim/live_edits.html"><strong aria-hidden="true">7.5.</strong> Live edits</a></li><li class="spacer"></li></ol></li><li class="chapter-item expanded "><a href="../project/index.html"><strong aria-hidden="true">8.</strong> Project</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../project/roadmap.html"><strong aria-hidden="true">8.1.</strong> Roadmap</a></li><li class="chapter-item expanded "><a href="../project/motivations.html"><strong aria-hidden="true">8.2.</strong> Motivations</a></li><li class="chapter-item expanded "><a href="../project/history/index.html"><strong aria-hidden="true">8.3.</strong> History</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../project/history/backstory.html"><strong aria-hidden="true">8.3.1.</strong> Backstory</a></li><li class="chapter-item expanded "><a href="../project/history/year1.html"><strong aria-hidden="true">8.3.2.</strong> Year 1</a></li><li class="chapter-item expanded "><a href="../project/history/year2.html"><strong aria-hidden="true">8.3.3.</strong> Year 2</a></li><li class="chapter-item expanded "><a href="../project/history/year3.html"><strong aria-hidden="true">8.3.4.</strong> Year 3</a></li></ol></li><li class="chapter-item expanded "><a href="../project/CHANGELOG.html"><strong aria-hidden="true">8.4.</strong> Full CHANGELOG</a></li><li class="chapter-item expanded "><a href="../project/references.html"><strong aria-hidden="true">8.5.</strong> References</a></li></ol></li></ol>
|
|
</div>
|
|
<div id="sidebar-resize-handle" class="sidebar-resize-handle"></div>
|
|
</nav>
|
|
|
|
<div id="page-wrapper" class="page-wrapper">
|
|
|
|
<div class="page">
|
|
|
|
<div id="menu-bar-hover-placeholder"></div>
|
|
<div id="menu-bar" class="menu-bar sticky bordered">
|
|
<div class="left-buttons">
|
|
<button id="sidebar-toggle" class="icon-button" type="button" title="Toggle Table of Contents" aria-label="Toggle Table of Contents" aria-controls="sidebar">
|
|
<i class="fa fa-bars"></i>
|
|
</button>
|
|
<button id="theme-toggle" class="icon-button" type="button" title="Change theme" aria-label="Change theme" aria-haspopup="true" aria-expanded="false" aria-controls="theme-list">
|
|
<i class="fa fa-paint-brush"></i>
|
|
</button>
|
|
<ul id="theme-list" class="theme-popup" aria-label="Themes" role="menu">
|
|
<li role="none"><button role="menuitem" class="theme" id="light">Light (default)</button></li>
|
|
<li role="none"><button role="menuitem" class="theme" id="rust">Rust</button></li>
|
|
<li role="none"><button role="menuitem" class="theme" id="coal">Coal</button></li>
|
|
<li role="none"><button role="menuitem" class="theme" id="navy">Navy</button></li>
|
|
<li role="none"><button role="menuitem" class="theme" id="ayu">Ayu</button></li>
|
|
</ul>
|
|
|
|
<button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
|
|
<i class="fa fa-search"></i>
|
|
</button>
|
|
|
|
</div>
|
|
|
|
<h1 class="menu-title">A/B Street</h1>
|
|
|
|
<div class="right-buttons">
|
|
<a href="../print.html" title="Print this book" aria-label="Print this book">
|
|
<i id="print-button" class="fa fa-print"></i>
|
|
</a>
|
|
|
|
</div>
|
|
</div>
|
|
|
|
|
|
<div id="search-wrapper" class="hidden">
|
|
<form id="searchbar-outer" class="searchbar-outer">
|
|
<input type="search" name="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header">
|
|
</form>
|
|
<div id="searchresults-outer" class="searchresults-outer hidden">
|
|
<div id="searchresults-header" class="searchresults-header"></div>
|
|
<ul id="searchresults">
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
|
|
|
|
<!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM -->
|
|
<script type="text/javascript">
|
|
document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible');
|
|
document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible');
|
|
Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) {
|
|
link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1);
|
|
});
|
|
</script>
|
|
|
|
<div id="content" class="content">
|
|
<main>
|
|
<h1><a class="header" href="#api" id="api">API</a></h1>
|
|
<p>Suppose you're tired of manually fiddling with traffic signals, and you want to
|
|
use machine learning to do it. You can run A/B Street without graphics and
|
|
automatically control it through an API.</p>
|
|
<h2><a class="header" href="#example" id="example">Example</a></h2>
|
|
<p>This
|
|
<a href="https://github.com/dabreegster/abstreet/blob/master/headless/examples/python_client.py">Python example</a>
|
|
has everything you need to get started.</p>
|
|
<h2><a class="header" href="#api-details" id="api-details">API details</a></h2>
|
|
<blockquote>
|
|
<p><strong>Under construction</strong>: The API will keep changing. There are no backwards
|
|
compatibility guarantees yet. Please make sure I know about your project, so I
|
|
don't break your client code.</p>
|
|
</blockquote>
|
|
<p>For now, the API is JSON over HTTP. The exact format is unspecified, error codes
|
|
are missing, etc. A summary of the commands available so far:</p>
|
|
<ul>
|
|
<li><strong>/sim</strong>
|
|
<ul>
|
|
<li><strong>GET /sim/reset</strong>: Reset all map edits and the simulation state. The trips
|
|
that will run don't change; they're determined by the scenario file you
|
|
initially pass to <code>headless</code>.</li>
|
|
<li><strong>GET /sim/get-time</strong>: Returns the current simulation time.</li>
|
|
<li><strong>GET /sim/goto-time?t=06:30:00</strong>: Simulate until 6:30 AM. If the time you
|
|
specify is before the current time, you have to call <strong>/sim/reset</strong> first.</li>
|
|
<li><strong>POST /sim/new-person</strong>: The POST body must be an
|
|
<a href="https://dabreegster.github.io/abstreet/rustdoc/sim/struct.ExternalPerson.html">ExternalPerson</a>
|
|
in JSON format.</li>
|
|
</ul>
|
|
</li>
|
|
<li><strong>/traffic-signals</strong>
|
|
<ul>
|
|
<li><strong>GET /traffic-signals/get?id=42</strong>: Returns the traffic signal of
|
|
intersection #42 in JSON.</li>
|
|
<li><strong>POST /traffic-signals/set</strong>: The POST body must be a
|
|
<a href="https://dabreegster.github.io/abstreet/rustdoc/map_model/struct.ControlTrafficSignal.html">ControlTrafficSignal</a>
|
|
in JSON format.</li>
|
|
<li><strong>GET /traffic-signals/get-delays?id=42&t1=03:00:00&t2=03:30:00</strong>: Returns
|
|
the delay experienced by every agent passing through intersection #42 from
|
|
3am to 3:30, grouped by direction of travel.</li>
|
|
<li><strong>GET /traffic-signals/get-cumulative-thruput?id=42</strong>: Returns the number of
|
|
agents passing through intersection #42 since midnight, grouped by direction
|
|
of travel.</li>
|
|
</ul>
|
|
</li>
|
|
<li><strong>/data</strong>
|
|
<ul>
|
|
<li><strong>GET /data/get-finished-trips</strong>: Returns a JSON list of all finished trips.
|
|
Each tuple is (time the trip finished in seconds after midnight, trip ID,
|
|
mode, duration of trip in seconds). The mode is either a string like "Walk"
|
|
or "Drive", or null if the trip was aborted (due to a simulation bug or
|
|
disconnected map).</li>
|
|
<li><strong>GET /data/get-agent-positions</strong>: Returns a JSON list of all active agents.
|
|
Vehicle type (or pedestrian), person ID, and position is included.</li>
|
|
</ul>
|
|
</li>
|
|
<li><strong>/map</strong>
|
|
<ul>
|
|
<li><strong>GET /map/get-edits</strong>: Returns the current map edits in JSON. You can save
|
|
this to a file in <code>data/player/edits/map_name/</code> and later use it in-game
|
|
normally. You can also later run the <code>headless</code> server with
|
|
<code>--edits=name_of_edits</code>.</li>
|
|
</ul>
|
|
</li>
|
|
</ul>
|
|
<h2><a class="header" href="#working-with-the-map-model" id="working-with-the-map-model">Working with the map model</a></h2>
|
|
<p>If you need to deeply inspect the map, you can dump it to JSON:</p>
|
|
<pre><code>cargo run --bin dump_map data/system/maps/montlake.bin > montlake.json
|
|
</code></pre>
|
|
<p>The format of the map isn't well-documented yet. See the
|
|
<a href="https://dabreegster.github.io/abstreet/rustdoc/map_model/index.html">generated API docs</a>
|
|
and <a href="https://dabreegster.github.io/abstreet/map/index.html">the map model docs</a>
|
|
in the meantime.</p>
|
|
<h2><a class="header" href="#working-with-individual-trips" id="working-with-individual-trips">Working with individual trips</a></h2>
|
|
<p>You can use the <strong>/sim/new-person</strong> API in the middle of a simulation, if
|
|
needed. If possible, it's simpler to create a Scenario as input.</p>
|
|
<h2><a class="header" href="#working-with-scenarios" id="working-with-scenarios">Working with Scenarios</a></h2>
|
|
<p>You can
|
|
<a href="https://dabreegster.github.io/abstreet/trafficsim/travel_demand.html#custom-import">import trips from your own data</a>.</p>
|
|
<p>You can also generate different variations of one of the
|
|
<a href="https://dabreegster.github.io/abstreet/trafficsim/travel_demand.html#proletariat-robot">demand models</a>
|
|
by specifying an RNG seed:</p>
|
|
<pre><code>cargo run --bin random_scenario -- --rng=123 --map=data/system/maps/montlake.bin > data/system/scenarios/montlake/home_to_work.json
|
|
</code></pre>
|
|
<p>You can also dump Scenarios (the file that defines all of the people and trips)
|
|
to JSON:</p>
|
|
<pre><code>cargo run --bin dump_scenario data/system/scenarios/montlake/weekday.bin > montlake_weekday.json
|
|
</code></pre>
|
|
<p>You can modify the JSON, then put the file back in the appropriate directory and
|
|
use it in-game:</p>
|
|
<pre><code>cargo run --bin game data/system/scenarios/montlake/modified_scenario.json
|
|
</code></pre>
|
|
<p>The Scenario format is also undocumented, but see the
|
|
<a href="https://dabreegster.github.io/abstreet/rustdoc/sim/struct.Scenario.html">generated API docs</a>
|
|
anyway.</p>
|
|
|
|
</main>
|
|
|
|
<nav class="nav-wrapper" aria-label="Page navigation">
|
|
<!-- Mobile navigation buttons -->
|
|
|
|
<a rel="prev" href="../dev/misc_tricks.html" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
|
|
<i class="fa fa-angle-left"></i>
|
|
</a>
|
|
|
|
|
|
|
|
<a rel="next" href="../dev/testing.html" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
|
|
<i class="fa fa-angle-right"></i>
|
|
</a>
|
|
|
|
|
|
<div style="clear: both"></div>
|
|
</nav>
|
|
</div>
|
|
</div>
|
|
|
|
<nav class="nav-wide-wrapper" aria-label="Page navigation">
|
|
|
|
<a rel="prev" href="../dev/misc_tricks.html" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
|
|
<i class="fa fa-angle-left"></i>
|
|
</a>
|
|
|
|
|
|
|
|
<a rel="next" href="../dev/testing.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
|
|
<i class="fa fa-angle-right"></i>
|
|
</a>
|
|
|
|
</nav>
|
|
|
|
</div>
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
<script type="text/javascript">
|
|
window.playpen_copyable = true;
|
|
</script>
|
|
|
|
|
|
|
|
|
|
|
|
<script src="../elasticlunr.min.js" type="text/javascript" charset="utf-8"></script>
|
|
<script src="../mark.min.js" type="text/javascript" charset="utf-8"></script>
|
|
<script src="../searcher.js" type="text/javascript" charset="utf-8"></script>
|
|
|
|
|
|
<script src="../clipboard.min.js" type="text/javascript" charset="utf-8"></script>
|
|
<script src="../highlight.js" type="text/javascript" charset="utf-8"></script>
|
|
<script src="../book.js" type="text/javascript" charset="utf-8"></script>
|
|
|
|
<!-- Custom JS scripts -->
|
|
|
|
|
|
|
|
|
|
</body>
|
|
</html>
|