Only provide const pointers to tiles.

We have recently started forbidding users from accessing non-const Tile
pointers.

Author: kring

Source/CesiumRuntime/Private/CesiumGltfComponent.cpp

@@ -3484,7 +3484,7 @@ UCesiumGltfComponent::CreateOffGameThread(
     UMaterialInterface* pBaseTranslucentMaterial,
     UMaterialInterface* pBaseWaterMaterial,
     FCustomDepthParameters CustomDepthParameters,
-    Cesium3DTilesSelection::Tile& tile,
+    const Cesium3DTilesSelection::Tile& tile,
     bool createNavCollision) {
   TRACE_CPUPROFILER_EVENT_SCOPE(Cesium::LoadModel)
 

Source/CesiumRuntime/Private/CesiumGltfComponent.h

@@ -89,7 +89,7 @@ class UCesiumGltfComponent : public USceneComponent, public ICesiumLoadedTile {
       UMaterialInterface* BaseTranslucentMaterial,
       UMaterialInterface* BaseWaterMaterial,
       FCustomDepthParameters CustomDepthParameters,
-      Cesium3DTilesSelection::Tile& tile,
+      const Cesium3DTilesSelection::Tile& tile,
       bool createNavCollision);
 
   UCesiumGltfComponent();
@@ -106,7 +106,7 @@ class UCesiumGltfComponent : public USceneComponent, public ICesiumLoadedTile {
   UPROPERTY(EditAnywhere, Category = "Rendering")
   FCustomDepthParameters CustomDepthParameters{};
 
-  Cesium3DTilesSelection::Tile* pTile = nullptr;
+  const Cesium3DTilesSelection::Tile* pTile = nullptr;
 
   FCesiumModelMetadata Metadata{};
   EncodedFeaturesMetadata::EncodedModelMetadata EncodedMetadata{};