abstreet/docs/backlog.md

Backlog

These are very old TODOs that aren't captured elsewhere.

Themed rendering

• halloween, winter, jungle, 8bit, organic (deform buildings), floorplan, machine (make buildings pump along front paths)

Halloween visual demo

• cars with headlights
• pumpkins
• fences / bushes / features in houses or triangulation on a block with buildings
• buildings as rooms in a hotel
• silent hill soundtrack
• deformed buildings pulsing on front path springs
• lighting?
• fog effects
• in 3D, what if roads are sunken rivers and buildings giant skyscrapers?
• eyes on the houses, that blink
• trick-or-treaters wandering around

Conga line idea

• try constructive approach for snake idea
  • with interactive mode?
• try destructive approach for snake idea
  • with interactive mode?

Charm

• music / sound effects
  • as you zoom in, overhear conversations and such
• some buildings could have extra detail
• zoom in too much, what might you see? ;)
• loading screen: snakey cars
• game intro/backstory: history of seattle urban planning
• player context: a drone. people will look up eventually.

More things to simulate

• seed parked cars in neighborhood with no owner or a far-away owner, to model reasonable starting state
• outgoing border nodes can throttle to simulate traffic downstream

Tooling

• play with https://github.com/glennw/thread_profiler
• and https://github.com/ferrous-systems/cargo-flamegraph
• display percentage breakdowns in Timer (need tree structure)

Boundary clipping

• some border intersections have weird OOBish geometry, or the arrows look weird
• simplify border node detection, only do it in convert_osm?

More data

• lanes: https://data-seattlecitygis.opendata.arcgis.com/datasets/49d417979fec452981a068ca078e7070_3
  • not filled out for most streets
• traffic circles: https://data-seattlecitygis.opendata.arcgis.com/datasets/717b10434d4945658355eba78b66971a_6
• https://data-seattlecitygis.opendata.arcgis.com/datasets/sidewalks
  • disagrees with OSM road centers sometimes
• https://data-seattlecitygis.opendata.arcgis.com/datasets/curb-ramps
• high quality thick roads: https://seattlecitygis.maps.arcgis.com/apps/webappviewer/index.html?id=86cb6824307c4d63b8e180ebcff58ce2
• render trees
• look for current stop sign priorities
  • https://gis-kingcounty.opendata.arcgis.com/datasets/traffic-signs--sign-point/
• http://guides.lib.uw.edu/research/gis/uw-lib_data has cool stuff, but .lyr??

Map edits

• lane type can affect border intersections

Sim bugs/tests needed

• do bikes use bike lanes?
• test that peds will use buses organically
  • make sure that we can jump to a ped on a bus and see the bus
• park/unpark needs to jump two lanes in the case of crossing a bike lane or something
  • should only be able to park from the closest lane, though!
• explicit tests making cars park at 0 and max_dist, peds walk to 0 and max_dist
• lanechange rebalancing
• parking/unparking on offside of oneway

Laundry list of intersection geometry ideas

• make sure road widths are reasonable first
  • SDOT dataset
  • channelization
• extend all the thick roads until they poke out of stuff (except for roads continuing straight)
• play with https://github.com/w8r/polygon-offset
• https://github.com/migurski/Skeletron
• stitch together orig center line of adj roads. then do polyline shifting, which already handles angle eating?
• manually draw intersections
  • montlake/520 4 traffic signal case. existing road geometry in OSM doesn't even cover everything.

Map layer

• fixed precision math
  • more careful geom types, with negative/positive cases
  • also bounds?
  • cant get rid of the ccw intersection check... different answer in some cases that looks bad

Sim layer

• rename Car->Vehicle?
• spawning is convoluted
  • popdat trip -> Scenario SpawnTrip -> pick ped speed and make spawner's TripSpec -> create trip and schedule a Command -> last minute rewriting when executing the command
• more precise car FSM by putting scheduler pointer into carstate

ezgui layer

• probably use f32, not f64 everywhere... but after Pt2D becomes fixed size
• undo the y inversion hacks at last!
• ezgui passes EventCtx and DrawCtx with appropriate things exposed.
  • hide stuff inside the ctx's? canvas and prerender shouldnt even be known outside of crate
• loading screen
  • FileWithProgress should go directly into Timer
    • need to understand lifetimes

Fix existing stuff

• if a lane could feasibly have multiple turn options but doesnt, print "ONLY"
• text box entry: highlight char looks like replace mode; draw it btwn chars

New features

• collapse smaller roads/neighborhoods and just show aggregate stats about them (in/out flow, moving/blocked within)

Better rendering

• depict residential bldg occupany size somehow
• rooftops
  • https://thumbs.dreamstime.com/b/top-view-city-street-asphalt-transport-people-walking-down-sidewalk-intersecting-road-pedestrian-81034411.jpg
  • https://thumbs.dreamstime.com/z/top-view-city-seamless-pattern-streets-roads-houses-cars-68652655.jpg
• general inspiration
  • https://gifer.com/en/2svr
  • https://www.fhwa.dot.gov/publications/research/safety/05078/images/fig6.gif
  • http://gamma.cs.unc.edu/HYBRID_TRAFFIC/images/3d-topdown.jpg
• color tuning
  • neutral (white or offwhite) color and make noncritical info close to that. http://davidjohnstone.net/pages/lch-lab-colour-gradient-picker, chroma < 50