Refactor scene viewport state into local sessions

editor/app/Features/Scene/SceneViewportSceneOverlay.cpp

@@ -3,6 +3,7 @@
 #include "Scene/SceneViewportTransformGizmoSupport.h"
 #include "Assets/EditorIconService.h"
 #include "Scene/EditorSceneRuntime.h"
+#include "Scene/SceneViewportSession.h"
 
 #include <algorithm>
 #include <utility>
@@ -27,10 +28,9 @@ bool ContainsPoint(const UIRect& rect, const UIPoint& point) {
 }
 
 SceneViewportGizmoSupport::SceneViewportOverlayData BuildOverlayData(
-    const EditorSceneRuntime& sceneRuntime) {
+    const SceneViewportSession& session) {
     SceneViewportGizmoSupport::SceneViewportOverlayData overlay = {};
-    const EditorSceneCameraSnapshot snapshot =
-        sceneRuntime.BuildSceneViewCameraSnapshot();
+    const EditorSceneCameraSnapshot snapshot = session.BuildCameraSnapshot();
     if (!snapshot.valid) {
         return overlay;
     }
@@ -88,7 +88,8 @@ void SceneViewportSceneOverlay::ResetFrame() {
 }
 
 void SceneViewportSceneOverlay::Refresh(
-    EditorSceneRuntime& sceneRuntime,
+    const EditorSceneRuntime& sceneRuntime,
+    const SceneViewportSession& session,
     const UIRect& viewportRect) {
     m_frame = {};
     m_frame.clipRect = viewportRect;
@@ -100,7 +101,7 @@ void SceneViewportSceneOverlay::Refresh(
     }
 
     const SceneViewportGizmoSupport::SceneViewportOverlayData overlay =
-        BuildOverlayData(sceneRuntime);
+        BuildOverlayData(session);
     if (!overlay.valid) {
         return;
     }