Don't let RefreshTileset destroy immediately

Author: j9liu

CHANGES.md

@@ -1,5 +1,11 @@
 # Change Log {#changes}
 
+### ? - ?
+
+##### Fixes :wrench:
+
+- Fixed an access violation that could occur if `ACesium3DTileset::RefreshTileset` was invoked in a callback for asynchronous actions.
+
 ### v2.22.1 - 2026-01-05
 
 ##### Fixes :wrench:

Source/CesiumRuntime/Private/Cesium3DTileset.cpp

@@ -82,6 +82,7 @@ ACesium3DTileset::ACesium3DTileset()
       CreditSystem(nullptr),
 
       _pTileset(nullptr),
+      _destroyOnNextTick(false),
 
 #ifdef CESIUM_DEBUG_TILE_STATES
       _pStateDebug(nullptr),
@@ -130,6 +131,7 @@ ACesium3DTileset::ACesium3DTileset()
 }
 
 ACesium3DTileset::~ACesium3DTileset() { this->DestroyTileset(); }
+
 PRAGMA_ENABLE_DEPRECATION_WARNINGS
 
 TSoftObjectPtr<ACesiumGeoreference> ACesium3DTileset::GetGeoreference() const {
@@ -339,7 +341,7 @@ void ACesium3DTileset::InvalidateResolvedCameraManager() {
   this->RefreshTileset();
 }
 
-void ACesium3DTileset::RefreshTileset() { this->DestroyTileset(); }
+void ACesium3DTileset::RefreshTileset() { this->_destroyOnNextTick = true; }
 
 void ACesium3DTileset::TroubleshootToken() {
   OnCesium3DTilesetIonTroubleshooting.Broadcast(this);
@@ -2020,6 +2022,11 @@ void ACesium3DTileset::Tick(float DeltaTime) {
     return;
   }
 
+  if (this->_destroyOnNextTick) {
+    this->DestroyTileset();
+    this->_destroyOnNextTick = false;
+  }
+
   if (!this->_pTileset) {
     LoadTileset();
 

Source/CesiumRuntime/Public/Cesium3DTileset.h

@@ -1380,6 +1380,7 @@ class CESIUMRUNTIME_API ACesium3DTileset : public AActor {
 
 private:
   TUniquePtr<Cesium3DTilesSelection::Tileset> _pTileset;
+  bool _destroyOnNextTick;
 
 #ifdef CESIUM_DEBUG_TILE_STATES
   TUniquePtr<Cesium3DTilesSelection::DebugTileStateDatabase> _pStateDebug;