Hey 2d and 3d selection work!

Small bug w.r.t. selecting multiple entities at once, should be a quick fix...

src/display3d.rs

@@ -493,21 +493,19 @@ fn select(
                                     hit::intersects3d(&ray, mesh, &gt).and_then(|_hit| {
                                         selectable
                                             .iter()
-                                            .find(|&parent| {
-                                                children
-                                                    .iter_descendants(parent)
-                                                    .any(|child| child == entity)
+                                            .find(|&e| {
+                                                // A child was hit (pieces)
+                                                let primary = entity == e;
+                                                // This entity was hit (tile hitboxes)
+                                                let secondary = children
+                                                    .iter_descendants(e)
+                                                    .any(|child| child == entity);
+
+                                                primary || secondary
                                             })
                                             .iter()
-                                            .for_each(|&parent| {
-                                                selected.iter().for_each(|s| {
-                                                    if s != parent {
-                                                        commands
-                                                            .entity(s)
-                                                            .remove::<game::Selected>();
-                                                    }
-                                                });
-                                                commands.entity(parent).insert(game::Selected);
+                                            .for_each(|&e| {
+                                                commands.entity(e).insert(game::Selected);
                                             });
                                         Some(())
                                     });