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make sure bikes can actually start moving

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This commit is contained in:
Dustin Carlino 2019-02-03 22:35:14 -08:00
parent 2f812e6265
commit 177f639f7b
2 changed files with 11 additions and 2 deletions
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4
sim/src/kinematics.rs
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@ -78,7 +78,9 @@ impl Vehicle {
vehicle_type: VehicleType::Bike,
debug: false,
// http://eprints.uwe.ac.uk/20767/ says mean 0.231
max_accel: Acceleration::meters_per_second_squared(rng.gen_range(0.2, 0.3)),
// TODO But it's too slow, bikes can't accelerate past a non-zeroish speed in 0.1s.
// Workaround properly... perhaps with a continuous time approach.
max_accel: Acceleration::meters_per_second_squared(rng.gen_range(1.1, 1.3)),
// Much easier deaccel. Partly to avoid accel_to_stop_in_dist bugs with bikes running
// stop signs.
max_deaccel: Acceleration::meters_per_second_squared(rng.gen_range(-1.3, -1.2)),

9
tests/src/physics.rs
View File

@ -1,5 +1,5 @@
use crate::runner::TestRunner;
use geom::{Distance, Speed, EPSILON_DIST};
use geom::{Acceleration, Distance, Speed, EPSILON_DIST};
use sim::kinematics::{results_of_accel_for_one_tick, Vehicle};
use sim::{Tick, TIMESTEP};
@ -59,6 +59,13 @@ pub fn run(t: &mut TestRunner) {
Some(Tick::testonly_from_raw(35 + 1200 + 36000))
);
});
t.run_fast("min_accel_doesnt_round_to_zero", |_| {
// Copied from kinematics.rs, for bikes.
let min_accel = Acceleration::meters_per_second_squared(1.1);
let speed = min_accel * TIMESTEP;
assert!(!speed.is_zero(TIMESTEP));
});
}
// TODO Make sure speed never exceeds the vehicle's cap