Always sync components for a client's entity even if it has no position

or has sync_me false in `Presence`.

common/src/region.rs

@@ -269,6 +269,28 @@ impl RegionMap {
         None
     }
 
+    /// Checks if this entity is located in the `RegionMap` using the provided
+    /// position to limit which regions are checked.
+    ///
+    /// May produce false negatives (e.g. if for some reason the entity is not
+    /// in a region near the provided position).
+    pub fn in_region_map_relaxed(&self, entity: specs::Entity, pos: Vec3<f32>) -> bool {
+        let id = entity.id();
+        let pos = pos.map(|e| e as i32);
+
+        // Compute key for most likely region
+        let key = Self::pos_key(pos);
+        if let Some(region) = self.regions.get(&key) && region.entities().contains(id) { return true }
+
+        // Get the base of the four nearest regions.
+        let quad_base = Self::pos_key(pos - (REGION_SIZE / 2) as i32);
+        [(0, 0), (0, 1), (1, 0), (1, 1)]
+            .iter()
+            .map(|&offset| Vec2::<i32>::from(offset) + quad_base)
+            // skip key we already checked
+            .any(|k| k != key && self.regions.get(&key).is_some_and(|r| r.entities().contains(id)))
+    }
+
     fn key_index(&self, key: Vec2<i32>) -> Option<usize> {
         self.regions.get_full(&key).map(|(i, _, _)| i)
     }

server/src/sys/entity_sync.rs

@@ -362,8 +362,6 @@ impl<'a> System<'a> for Sys {
             }
         }
 
-        // TODO: Sync clients that don't have a position?
-
         // Sync inventories
         for (inventory, update, client) in (inventories, &mut inventory_updates, &clients).join() {
             client.send_fallible(ServerGeneral::InventoryUpdate(
@@ -372,18 +370,19 @@ impl<'a> System<'a> for Sys {
             ));
         }
 
-        // TODO: this seems like the ideal spot to sync other components for clients
-        // that don't have a position or otherwise aren't included in the regions that
-        // the client is subscribed to...
-        //
-        // Maybe we can pass a bool into `create_sync_from_client_package`... renamed it
-        // to create_sync_package_for_client_entity(?)
-        // create_client_sync_package(?)
-        //
         // Sync components that are only synced for the client's own entity.
-        for (entity, client) in (&entities, &clients).join() {
-            let comp_sync_package =
-                trackers.create_sync_from_client_package(&tracked_storages, entity);
+        for (entity, client, maybe_pos) in (&entities, &clients, positions.maybe()).join() {
+            // Include additional components for clients that aren't in a region (e.g. due
+            // to having no position or have sync_me as `false`) since those
+            // won't be synced above.
+            let include_all_comps =
+                !maybe_pos.is_some_and(|pos| region_map.in_region_map_relaxed(entity, pos.0));
+
+            let comp_sync_package = trackers.create_sync_from_client_package(
+                &tracked_storages,
+                entity,
+                include_all_comps,
+            );
             if !comp_sync_package.is_empty() {
                 client.send_fallible(ServerGeneral::CompSync(
                     comp_sync_package,

server/src/sys/sentinel.rs

@@ -231,10 +231,14 @@ macro_rules! trackers {
 
 
             /// Create sync package for components that are only synced for the client's entity.
+            ///
+            /// This can optionally include components that are synced "for any entity" for cases
+            /// where other mechanisms don't sync those components.
             pub fn create_sync_from_client_package(
                 &self,
                 comps: &TrackedStorages,
                 entity: specs::Entity,
+                include_all_comps: bool,
             ) -> CompSyncPackage<EcsCompPacket> {
                 // TODO: this type repeats the entity uid for each component but
                 // we know they will all be the same here, using it for now for
@@ -249,10 +253,10 @@ macro_rules! trackers {
                 };
 
                 $(
-                    if matches!(
-                        <$component_type as NetSync>::SYNC_FROM,
-                        SyncFrom::ClientEntity,
-                    ) {
+                    if match <$component_type as NetSync>::SYNC_FROM {
+                        SyncFrom::ClientEntity => true,
+                        SyncFrom::AnyEntity => include_all_comps,
+                    } {
                         comp_sync_package.add_component_update(
                             &self.$component_name,
                             &comps.$component_name,