From fc24bc6e85787d72bf76b4409337fb8a8473b5b8 Mon Sep 17 00:00:00 2001
From: Robert Swain <robert.swain@gmail.com>
Date: Sat, 19 Mar 2022 19:51:49 +0100
Subject: [PATCH] scene_viewer: Use get_single_mut as there should be exactly
 one CameraController

---
 examples/tools/scene_viewer.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/examples/tools/scene_viewer.rs b/examples/tools/scene_viewer.rs
index 0de3c32d7824d..d5e9ad973dfe0 100644
--- a/examples/tools/scene_viewer.rs
+++ b/examples/tools/scene_viewer.rs
@@ -342,7 +342,7 @@ fn camera_controller(
         mouse_delta += mouse_event.delta;
     }
 
-    for (mut transform, mut options) in query.iter_mut() {
+    if let Ok((mut transform, mut options)) = query.get_single_mut() {
         if !options.initialized {
             let (_roll, yaw, pitch) = transform.rotation.to_euler(EulerRot::ZYX);
             options.yaw = yaw;
@@ -350,7 +350,7 @@ fn camera_controller(
             options.initialized = true;
         }
         if !options.enabled {
-            continue;
+            return;
         }
 
         // Handle key input