Fix: apply steering input properly

The ship in Asteroids isn't expected to spin up while holding a steering
direction, but that's exactly what I just made it do.

Fix that problem by assigning, not accumulating, the angular velocity
for the ship.

src/config.rs

@@ -13,6 +13,6 @@ pub(crate) const ASTEROID_SMALL_COLOR: Color = Color::srgb(1.0, 0., 0.);
 // TODO: asteroid medium & large
 
 pub(crate) const SHIP_THRUST: f32 = 1.0;
-pub(crate) const SHIP_ROTATION: f32 = 0.1; // +/- rotation speed in... radians per frame
+pub(crate) const SHIP_ROTATION: f32 = 4.0; // +/- rotation speed in... radians per frame
 
 pub const RNG_SEED: [u8; 32] = *b"12345678909876543210123456789098";

src/lib.rs

@@ -280,9 +280,11 @@ fn input_ship_rotation(
     };
 
     if keyboard_input.pressed(KeyCode::KeyA) {
-        angular_vel.0 += SHIP_ROTATION;
+        angular_vel.0 = SHIP_ROTATION;
     } else if keyboard_input.pressed(KeyCode::KeyD) {
-        angular_vel.0 -= SHIP_ROTATION;
+        angular_vel.0 = -SHIP_ROTATION;
+    } else {
+        angular_vel.0 = 0.0;
     }
 }
 

src/ship.rs

@@ -1,5 +1,6 @@
 use crate::{
-    physics::{Velocity, Wrapping}, AngularVelocity, GameAssets
+    AngularVelocity, GameAssets,
+    physics::{Velocity, Wrapping},
 };
 
 use bevy::prelude::*;