fix: can click through loading screen [MTT-4753] (#760)

* Adding graphic raycaster to loading screen and turning on/off raycast blocking

Author: LPLafontaineB

Assets/Prefabs/UI/LoadingScreen.prefab

@@ -462,6 +462,7 @@ GameObject:
   - component: {fileID: 5535057700358825828}
   - component: {fileID: 5841466599347033389}
   - component: {fileID: 3127630062634103998}
+  - component: {fileID: 2516136186326398479}
   m_Layer: 5
   m_Name: LoadingScreen
   m_TagString: Untagged
@@ -543,7 +544,7 @@ CanvasGroup:
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 948382310089859896}
   m_Enabled: 1
-  m_Alpha: 1
+  m_Alpha: 0
   m_Interactable: 0
   m_BlocksRaycasts: 0
   m_IgnoreParentGroups: 0
@@ -582,6 +583,23 @@ MonoBehaviour:
   - {fileID: 6817560313460574097}
   m_LoadingProgressManager: {fileID: 0}
   m_PersistentPlayerRuntimeCollection: {fileID: 11400000, guid: 23c3465e22da67c4e812c4faf3adb1cb, type: 2}
+--- !u!114 &2516136186326398479
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 948382310089859896}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: dc42784cf147c0c48a680349fa168899, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_IgnoreReversedGraphics: 1
+  m_BlockingObjects: 0
+  m_BlockingMask:
+    serializedVersion: 2
+    m_Bits: 4294967295
 --- !u!1 &1057458229063515816
 GameObject:
   m_ObjectHideFlags: 0

Packages/com.unity.multiplayer.samples.coop/CHANGELOG.md

@@ -1,5 +1,16 @@
 # Multiplayer Samples Co-op Changelog
 
+## [Unreleased] - yyyy-mm-dd
+
+### Added
+* ClientLoadingScreen now sets raycast blocking to true when the loading screen is visible (#760)
+### Changed
+*
+### Removed
+*
+### Fixed
+*
+
 ## [1.4.0] - 2022-10-06
 
 ### Added

Packages/com.unity.multiplayer.samples.coop/Utilities/SceneManagement/ClientLoadingScreen.cs

@@ -71,7 +71,7 @@ void Awake()
 
         void Start()
         {
-            m_CanvasGroup.alpha = 0;
+            SetCanvasVisibility(false);
             m_LoadingProgressManager.onTrackersUpdated += OnProgressTrackersUpdated;
         }
 
@@ -130,7 +130,7 @@ public void StopLoadingScreen()
 
         public void StartLoadingScreen(string sceneName)
         {
-            m_CanvasGroup.alpha = 1;
+            SetCanvasVisibility(true);
             m_LoadingScreenRunning = true;
             UpdateLoadingScreen(sceneName);
             ReinitializeProgressBars();
@@ -220,6 +220,12 @@ public void UpdateLoadingScreen(string sceneName)
             }
         }
 
+        void SetCanvasVisibility(bool visible)
+        {
+            m_CanvasGroup.alpha = visible ? 1 : 0;
+            m_CanvasGroup.blocksRaycasts = visible;
+        }
+
         IEnumerator FadeOutCoroutine()
         {
             yield return new WaitForSeconds(m_DelayBeforeFadeOut);
@@ -233,7 +239,7 @@ IEnumerator FadeOutCoroutine()
                 currentTime += Time.deltaTime;
             }
 
-            m_CanvasGroup.alpha = 0;
+            SetCanvasVisibility(false);
         }
     }
 }