repeat a weekday scenario many times to experiment with longer-term pandemic modelling

game/src/sandbox/gameplay/freeform.rs

@@ -203,6 +203,14 @@ fn make_change_traffic(btn: ScreenRectangle) -> Box<dyn State> {
                              quiet, so you may need to fast-forward to morning rush hour. Data \
                              comes from Puget Sound Regional Council's Soundcast model.",
                         ));
+                        list.push(
+                            Choice::new("5 weekdays repeated", "5 weekdays repeated".to_string())
+                                .tooltip(
+                                    "Same as the weekday traffic pattern, but blindly repeated 5 \
+                                     times. This isn't realistic; people don't take exactly the \
+                                     same trips every day.",
+                                ),
+                        );
                     } else {
                         list.push(Choice::new(name.clone(), name));
                     }

game/src/sandbox/gameplay/mod.rs

@@ -142,6 +142,10 @@ impl GameplayMode {
             let mut s = Scenario::empty(map, "just buses");
             s.only_seed_buses = None;
             s
+        } else if name == "5 weekdays repeated" {
+            let s: Scenario =
+                abstutil::read_binary(abstutil::path_scenario(map.get_name(), "weekday"), timer);
+            s.repeat_days(5)
         } else {
             let path = abstutil::path_scenario(map.get_name(), &name);
             match abstutil::maybe_read_binary(path.clone(), timer) {

sim/src/make/scenario.rs

@@ -3,7 +3,7 @@ use crate::{
     BIKE_LENGTH, MAX_CAR_LENGTH, MIN_CAR_LENGTH,
 };
 use abstutil::Timer;
-use geom::{Distance, Speed, Time};
+use geom::{Distance, Duration, Speed, Time};
 use map_model::{BuildingID, BusRouteID, BusStopID, Map, Position, RoadID};
 use rand::seq::SliceRandom;
 use rand::Rng;
@@ -156,6 +156,25 @@ impl Scenario {
             Speed::meters_per_second(1.34),
         )
     }
+
+    pub fn repeat_days(mut self, days: usize) -> Scenario {
+        self.scenario_name = format!("{} repeated for {} days", self.scenario_name, days);
+        for person in &mut self.people {
+            let mut trips = Vec::new();
+            let mut offset = Duration::ZERO;
+            for _ in 0..days {
+                for trip in &person.trips {
+                    trips.push(IndividTrip {
+                        depart: trip.depart + offset,
+                        trip: trip.trip.clone(),
+                    });
+                }
+                offset += Duration::hours(24);
+            }
+            person.trips = trips;
+        }
+        self
+    }
 }
 
 fn seed_parked_cars(