TODO for Phase 3 (Simulation)

cars

features
- different lookahead reaction times
- figure out lanechanging (and turns that dont make sense)
code cleanup
- figure out responsibility btwn agents and managers, then fix up visibility
- things like ParkingSimState have so many methods -- some are only meant for spawner, or driving/walking to query. separate out some traits.
- on a lane vs turn permeates so many places
better visualization
- draw moving / blocked colors (gradually more red as they wait longer)
- make lookahead buffer follow the shape of the road and extend into other lanes and stuff
- render cars with textures?
reversible sim
be careful
- could see if we ever have a lookahead constraint to deaccel more than what we're capable of. it might mask problems. but since things like accel_to_stop_in_dist don't have a careful notion of how much time will pass, they recommend big rates sometimes.
- no way for an agent to request a turn and ASAP have it granted. are there cases where they might slow down unnecessarily?

savestating a sim has nondet output due to hashes; switching to btree is kind of weird
- consider overriding encoding for TurnID and such, instead of remembering to stick maps everywhere
diffing two sim states is tedious no matter what; is there a nice macro-driven deep equals we could do instead?
- will need programmatic diffs later for pointing out changes to players in A/B tests
consider refactoring car/ped sim
- basic structure with actions, react, stepping is same. SimQueue, lookahead, can goto? differs.
handle map borders
- manually mark them?
- be able to start/end trips there
- start to model demand data with manually selecting a source/dest area
figure out how to capture stacktraces kinda optionally
- manual call at a fxn to dump its stacktrace somewhere (to a file? ideally shared global state to dedupe stuff)
- macro to insert a call at the beginning of a fxn
- macro to apply a macro to all fxns in an impl
- then i can manually edit a few places when I want to gather data