Move physics parts to a physics module

src/birdoids/physics.rs

@@ -0,0 +1,16 @@
+use bevy::prelude::*;
+
+#[derive(Component, Deref, DerefMut)]
+pub struct Velocity(pub Vec3);
+
+#[derive(Component, Default, Deref, DerefMut, PartialEq, Debug)]
+pub struct Force(pub Vec3);
+
+pub fn apply_velocity(mut query: Query<(&mut Transform, &Velocity, &mut Force)>, time: Res<Time>) {
+    for (mut transform, velocity, mut acceleration) in &mut query {
+        let delta_v = **acceleration * time.delta_secs();
+        **acceleration = Vec3::ZERO;
+        let delta_position = (**velocity + delta_v) * time.delta_secs();
+        transform.translation += delta_position;
+    }
+}