TODO

mvp strawman sim

straw model has some quirks with queueing
- after the lead vehicle starts the turn, the queue behind it magically warps to the front of the road
- the first vehicle in the turn jumps to a strange position based on the front/back rendering
at signals, cars doing the same turn wont start it until the last car finishes it
draw cars in intersections, even when slightly zoomed out
- draw cars in slightly different colors, to distinguish them better
traffic signals
- parse kml
draw moving / blocked colors (gradually more red as they wait longer)
draw stop buffer in front/behind of cars
cars with different speeds
clean up code
- line type
- ditch vec2d / settle on types
- split out UI stuff
- easier way to define magic tuneable constants

make editor mode for traffic signals
- button to reset intersection to original cycles
- turns can belong to multiple cycles; the colors become slightly meaningless
stop sign editor (start simple)
- cant have no stop signs for two roads whose center line crosses
  - infer default policy
- draw as red octogon with thin white trim, off to the right side of the road
- later feature: ban individual turns
more data
- shp parser for traffic signals
- do need to mouseover shapefile things and see full data
- traffic signal description field says number of phases
- so many signs: https://gis-kingcounty.opendata.arcgis.com/datasets/traffic-signs--sign-point/
  - all up north? :(
why are some icons in the intersection?
support left turn yield
draw detailed turns better, like https://i.ytimg.com/vi/NH6R3RH_ZDY/maxresdefault.jpg
mark problem areas where road is too short!
manually fix OSM issues, like deleting a way completely

add/plan tests
run clippy everywhere
extract common crates
ask about mut vs returning new version of self (and what that requires of all the contained stuff)
- https://stackoverflow.com/questions/28385339/mutable-self-while-reading-from-owner-object
break editor up into more crates
minimize heap usage -- look into profiling and smallvec
use some tool to enforce consistent style (import order, extern crate only in mod.rs or lib.rs, derive order)

support massive maps
- render to a bitmap and clip that in?
- drop events sometimes
draw water and greenery areas
more toggleable layers
- show road/bldg types by color
  - can also use to interactively find osm filters to fix
- show where on-street parking probably is
- show where sidewalks probably are
  - infer from roads and parcel data?
- draw benches, bike racks
  - more generally, a way to display random GIS data from seattle site (kml)
3D UI sharing the same structure as the 2D one
web version