more physics systems stuff

src/physics.rs

@@ -1,6 +1,28 @@
-use bevy::{ecs::component::Component, math::I64Vec2};
+/// This module is intended to be used as a fixed-point physics system.
+/// The hope is that this will make deterministic physics easier,
+/// and therefore networking a bit less of a pain.
+use bevy::{
+    app::{Plugin, Update},
+    ecs::{component::Component, system::Query},
+    math::I64Vec2,
+};
 
-const MAX_SPEED: i64 = 256;
+const MAX_SPEED: i64 = 400;
+
+#[derive(Default, Debug)]
+pub struct Physics2DPlugin {}
+
+impl Plugin for Physics2DPlugin {
+    fn build(&self, app: &mut bevy::app::App) {
+        app.add_systems(Update, tick_physics);
+    }
+}
+
+fn tick_physics(mut query: Query<&mut PhysicsBody2D>) {
+    query.iter_mut().for_each(|mut pb| {
+        pb.tick();
+    });
+}
 
 #[derive(Default, Debug, Component)]
 pub struct PhysicsBody2D {