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< 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" class = "active" > < 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" > < 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/details.html" > < strong aria-hidden = "true" > 6.1.< / strong > Details< / a > < / li > < li class = "chapter-item expanded " > < a href = "../map/importing/index.html" > < strong aria-hidden = "true" > 6.2.< / strong > Importing< / a > < / li > < li > < ol class = "section" > < li class = "chapter-item expanded " > < a href = "../map/importing/convert_osm.html" > < strong aria-hidden = "true" > 6.2.1.< / strong > convert_osm< / a > < / li > < li class = "chapter-item expanded " > < a href = "../map/importing/geometry.html" > < strong aria-hidden = "true" > 6.2.2.< / strong > Road/intersection geometry< / a > < / li > < li class = "chapter-item expanded " > < a href = "../map/importing/rest.html" > < strong aria-hidden = "true" > 6.2.3.< / strong > The rest< / a > < / li > < li class = "chapter-item expanded " > < a href = "../map/importing/misc.html" > < strong aria-hidden = "true" > 6.2.4.< / strong > Misc< / a > < / li > < / ol > < / li > < li class = "chapter-item expanded " > < a href = "../map/edits.html" > < strong aria-hidden = "true" > 6.3.< / strong > Live edits< / a > < / li > < li class = "chapter-item expanded " > < a href = "../map/platform.html" > < strong aria-hidden = "true" > 6.4.< / strong > Exporting< / 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 = "chapter-item expanded " > < a href = "../trafficsim/parking.html" > < strong aria-hidden = "true" > 7.6.< / strong > Parking< / a > < / li > < li class = "spacer" > < / li > < / ol > < / li > < li class = "chapter-item expanded " > < a href = ".
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< h1 > < a class = "header" href = "#developer-guide" id = "developer-guide" > Developer guide< / a > < / h1 >
< h2 > < a class = "header" href = "#getting-started" id = "getting-started" > Getting started< / a > < / h2 >
< p > You will first need:< / p >
< ul >
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< li > Stable Rust, at least 1.46. < a href = "https://www.rust-lang.org/tools/install" > https://www.rust-lang.org/tools/install< / a > .
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< ul >
< li > On Windows, you may need
< a href = "https://visualstudio.microsoft.com/de/downloads/" > Visual Studio 2019< / a > .< / li >
< / ul >
< / li >
< li > On Linux, < code > sudo apt-get install xorg-dev libxcb-shape0-dev libxcb-xfixes0-dev< / code >
or the equivalent for your distro< / li >
< / ul >
< p > One-time setup:< / p >
< ol >
< li >
< p > Download the repository:
< code > git clone https://github.com/dabreegster/abstreet.git< / code > < / p >
< / li >
< li >
< p > Grab the minimal amount of data to get started: < code > cargo run --bin updater< / code > < / p >
< / li >
< li >
< p > Run the game: < code > RUST_BACKTRACE=1 cargo run --bin game --release< / code > . On Windows,
set environment variables like this:
< code > set RUST_BACKTRACE=1 & & cargo run --bin game --release< / code > < / p >
< / li >
< / ol >
< h2 > < a class = "header" href = "#development-tips" id = "development-tips" > Development tips< / a > < / h2 >
< ul >
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< li > < a href = "https://dabreegster.github.io/abstreet/rustdoc/map_model/index.html" > Generated API documentation< / a > < / li >
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< li > Compile faster by just doing < code > cargo run< / code > . The executable will have debug stack
traces and run more slowly. You can do < code > cargo run --release< / code > to build in
optimized release mode; compilation will be slower, but the executable much
faster.< / li >
< li > Some in-game features are turned off by default or don't have a normal menu to
access them. The list:
< ul >
< li > To toggle developer mode: press < strong > Control+S< / strong > in game, or
< code > cargo run -- --dev< / code > < / li >
< li > To warp to an object by numeric ID: press < strong > Control+j< / strong > < / li >
< li > To enter debug mode with all sorts of goodies: press < strong > Control+D< / strong > < / li >
< / ul >
< / li >
< li > You can start the game in different modes using flags:
< ul >
< li > < code > cargo run --bin game -- --dev data/system/maps/downtown.bin< / code > starts on a
particular map< / li >
< li > < code > cargo run --bin game -- data/system/scenarios/downtown/weekday.bin< / code > starts
with a scenario (which is tied to a certain map)< / li >
< li > < code > cargo run --bin game -- --challenge=trafficsig/tut2< / code > starts on a particular
challenge. See the list of aliases by passing in a bad value here.< / li >
< li > < code > cargo run --bin game -- data/player/saves/montlake/no_edits_unnamed/00h00m20.3s.bin< / code >
restores an exact simulation state. Savestates are found in debug mode
(< strong > Control+D< / strong > ) -- they're probably confusing for the normal player
experience, so they're hidden for now.< / li >
< li > < code > cargo run --bin game -- --tutorial=12< / code > starts somewhere in the tutorial< / li >
< li > Adding < code > --edits='name of edits'< / code > starts with edits applied to the map.< / li >
< / ul >
< / li >
< / ul >
< h2 > < a class = "header" href = "#downloading-more-cities" id = "downloading-more-cities" > Downloading more cities< / a > < / h2 >
< p > As data formats change over time, things in the < code > data/< / code > directory not under
version control will get out of date. At any time, you can run
< code > cargo run --bin updater< / code > from the main repository directory to update only the
files that have changed.< / p >
< p > You can also opt into downloading updates for more cities by editing
< code > data/config< / code > . Opting into everything looks like this:< / p >
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< pre > < code > runtime: seattle,huge_seattle,krakow,berlin,xian,tel_aviv,london
input: seattle,huge_seattle,krakow,berlin,xian,tel_aviv,london
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< / code > < / pre >
< p > < code > runtime< / code > downloads new maps and scenarios in < code > data/system/< / code > . < code > input< / code > is used
for building those maps -- see below.< / p >
< h2 > < a class = "header" href = "#building-map-data" id = "building-map-data" > Building map data< / a > < / h2 >
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< p > You can skip this section if you're just touching code in < code > game< / code > , < code > widgetry< / code > ,
and < code > sim< / code > .< / p >
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< p > To run all pieces of the importer, you'll need some extra dependencies:< / p >
< ul >
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< li > < code > osmconvert< / code > : See < a href = "https://wiki.openstreetmap.org/wiki/Osmconvert#Download" > https://wiki.openstreetmap.org/wiki/Osmconvert#Download< / a > or
< a href = "https://github.com/interline-io/homebrew-planetutils#installation" > https://github.com/interline-io/homebrew-planetutils#installation< / a > for Mac< / li >
< li > < code > libgdal-dev< / code > : See < a href = "https://gdal.org" > https://gdal.org< / a > if your OS package manager doesn't have
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this. If you keep hitting linking errors, then just remove
< code > --features scenarios< / code > from < code > import.sh< / code > . You won't be able to build the
Seattle scenarios.< / li >
< li > Standard Unix utilities: < code > curl< / code > , < code > unzip< / code > , < code > gunzip< / code > < / li >
< / ul >
< p > The first stage of the importer, < code > --raw< / code > , will download input files from OSM,
King County GIS, and so on. If the mirrors are slow or the files vanish, you
could fill out < code > data/config< / code > and use the < code > updater< / code > described above to grab the
latest input.< / p >
< p > You can rerun specific stages of the importer:< / p >
< ul >
< li > If you're modifying the initial OSM data -> RawMap conversion in
< code > convert_osm< / code > , you need < code > ./import.sh --raw --map< / code > .< / li >
< li > If you're modifying < code > map_model< / code > but not the OSM -> RawMap conversion, then you
just need < code > ./import.sh --map< / code > .< / li >
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< li > If you're modifying the demand model for Seattle, you can add < code > --scenario< / code > to
regenerate.< / li >
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< li > By default, all maps are regenerated. You can also specify a single map:
< code > ./import.sh --map downtown< / code > .< / li >
< li > By default, Seattle is assumed as the city. You have to specify otherwise:
< code > ./import.sh --city=los_angeles --map downtown_la< / code > .< / li >
< / ul >
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< p > You can also make the importer < a href = "../howto/new_city.html" > import a new city< / a > .< / p >
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< h2 > < a class = "header" href = "#understanding-stuff" id = "understanding-stuff" > Understanding stuff< / a > < / h2 >
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< p > The docs listed at < a href = "https://github.com/dabreegster/abstreet#documentation" > https://github.com/dabreegster/abstreet#documentation< / a >
explain things like map importing and how the traffic simulation works.< / p >
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< h3 > < a class = "header" href = "#code-organization" id = "code-organization" > Code organization< / a > < / h3 >
< p > If you're going to dig into the code, it helps to know what all the crates are.
The most interesting crates are < code > map_model< / code > , < code > sim< / code > , and < code > game< / code > .< / p >
< p > Constructing the map:< / p >
< ul >
< li > < code > convert_osm< / code > : extract useful data from OpenStreetMap and other data sources,
emit intermediate map format< / li >
< li > < code > kml< / code > : extract shapes from KML shapefiles< / li >
< li > < code > map_model< / code > : the final representation of the map, also conversion from the
intermediate map format into the final format< / li >
< li > < code > map_editor< / code > : GUI for modifying geometry of maps and creating maps from
scratch. pretty abandoned as of June 2020< / li >
< li > < code > importer< / code > : tool to run the entire import pipeline< / li >
< li > < code > updater< / code > : tool to download/upload large files used in the import pipeline< / li >
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< li > < code > map_tests< / code > : tests for the map import pipeline< / li >
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< / ul >
< p > Traffic simulation:< / p >
< ul >
< li > < code > sim< / code > : all of the agent-based simulation logic< / li >
< li > < code > headless< / code > : tool to run a simulation without any visualization< / li >
< / ul >
< p > Graphics:< / p >
< ul >
< li > < code > game< / code > : the GUI and main gameplay< / li >
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< li > < code > widgetry< / code > : a GUI and 2D OpenGL rendering library, using glium + winit +
glutin< / li >
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< / ul >
< p > Common utilities:< / p >
< ul >
< li > < code > abstutil< / code > : a grab-bag of IO helpers, timing and logging utilities, etc< / li >
< li > < code > geom< / code > : types for GPS and map-space points, lines, angles, polylines,
polygons, circles, durations, speeds< / li >
< / ul >
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< p > Other:< / p >
< ul >
< li > < code > traffic_seitan< / code > : a bug-finding tool that randomly generates live map edits< / li >
< / ul >
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< h2 > < a class = "header" href = "#code-conventions" id = "code-conventions" > Code conventions< / a > < / h2 >
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< p > All code is automatically formatted using
< a href = "https://github.com/rust-lang/rustfmt" > https://github.com/rust-lang/rustfmt< / a > ; please run < code > cargo +nightly fmt< / code > before
sending a PR. (You have to install the nightly toolchain just for fmt)< / p >
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< p > cargo fmt can't yet organize imports, but we follow a convention to minimize
conflict with what some IDEs do. Follow existing code to group imports: std,
external crates, other crates in the project, the current crate, then finally
any module declarations.< / p >
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< p > The error handling is unfortunately inconsistent. The goal is to gracefully
degrade instead of crashing the game. If a crash does happen, make sure the logs
will have enough context to reproduce and debug. For example, giving up when
some geometry problem happens isn't ideal, but at least make sure to print the
road / agent IDs or whatever will help find the problem. It's fine to crash
during map importing, since the player won't deal with this, and loudly stopping
problems is useful. It's also fine to crash when initially constructing all of
the renderable map objects, because this crash will consistently happen at
startup-time and be noticed by somebody developing before a player gets to it.< / p >
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< p > Prefer using < code > info!< / code > , < code > warn!< / code > , < code > error!< / code > , etc from the < code > log< / code > crate. Or if a
< code > Timer< / code > is available and you want to collect all notes together, < code > timer.note< / code > .
There are still many places calling < code > println!< / code > , but we're trying to clean these
up.< / p >
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< p > See the < a href = "testing.html" > testing strategy< / a > page.< / p >
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< h2 > < a class = "header" href = "#profiling" id = "profiling" > Profiling< / a > < / h2 >
< p > Use < a href = "https://github.com/flamegraph-rs/flamegraph" > https://github.com/flamegraph-rs/flamegraph< / a > , just running it on the
binaries you build normally.< / p >
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