More optimizations to coordinate/position sync.

src/core.rs

@@ -550,7 +550,11 @@ fn copy_coordinates_to_transform(
     config: Res<CoreConfig>,
     mut query: Query<
         (&Coordinates, &mut Transform),
-        (Without<RigidBodyPosition>, Without<ColliderPosition>),
+        (
+            Changed<Transform>,
+            Without<RigidBodyPosition>,
+            Without<ColliderPosition>,
+        ),
     >,
 ) {
     for (coordinates, mut transform) in query.iter_mut() {
@@ -578,6 +582,22 @@ fn copy_rigid_body_position_to_coordinates(
     }
 }
 
+fn copy_collider_position_to_coordinates(
+    mut query: Query<
+        (&mut Coordinates, &ColliderPosition),
+        (Without<RigidBodyPosition>, Changed<ColliderPosition>),
+    >,
+) {
+    for (mut coordinates, position) in query.iter_mut() {
+        if coordinates.0 .0 != position.translation.x {
+            coordinates.0 .0 = position.translation.x;
+        }
+        if coordinates.0 .1 != position.translation.y {
+            coordinates.0 .1 = position.translation.y;
+        }
+    }
+}
+
 #[derive(Clone, Copy, Debug)]
 pub struct CoreConfig {
     pub pixels_per_unit: u8,
@@ -607,6 +627,10 @@ impl Plugin for CorePlugin {
             .add_system_to_stage(
                 CoreStage::PostUpdate,
                 copy_rigid_body_position_to_coordinates.system(),
+            )
+            .add_system_to_stage(
+                CoreStage::PostUpdate,
+                copy_collider_position_to_coordinates.system(),
             );
     }
 }