Add functions to get the approximate location of a tileset during runtime

Source/CesiumRuntime/Private/Cesium3DTileset.cpp

@@ -165,6 +165,43 @@ void ACesium3DTileset::InvalidateResolvedGeoreference() {
   this->ResolvedGeoreference = nullptr;
 }
 
+FVector ACesium3DTileset::GetApproximateTilesetLocationUnreal(bool& rootTileAvailable) {
+    ACesiumGeoreference* pGeoreference = this->ResolveGeoreference();
+    bool tempBool = false;
+
+    FVector approximateRootTileLocationECEF = this->GetApproximateTilesetLocationECEF(tempBool);
+    FVector approximateRootTileLocationUnreal = pGeoreference->TransformEarthCenteredEarthFixedPositionToUnreal(approximateRootTileLocationECEF);
+
+    rootTileAvailable = tempBool;
+    return approximateRootTileLocationUnreal;
+}
+
+
+FVector ACesium3DTileset::GetApproximateTilesetLocationECEF(bool& rootTileAvailable) {
+    const Cesium3DTilesSelection::Tile* pRootTile =
+        this->_pTileset->getRootTile();
+    if (!pRootTile) {
+        UE_LOG(
+            LogCesium,
+            Warning,
+            TEXT("Root tile not (yet) available for actor %s"),
+            *this->GetName());
+
+        rootTileAvailable = false;
+
+        return FVector::ZeroVector;
+    }
+
+    glm::dmat4x4 rootTileTransform = pRootTile->getTransform();
+    glm::dvec3 translation(rootTileTransform[3][0], rootTileTransform[3][1], rootTileTransform[3][2]);
+
+    FVector approximateRootTileLocationECEF = VecMath::createVector(translation);
+
+    rootTileAvailable = true;
+
+    return approximateRootTileLocationECEF;
+}
+
 TSoftObjectPtr<ACesiumCreditSystem> ACesium3DTileset::GetCreditSystem() const {
   return this->CreditSystem;
 }

Source/CesiumRuntime/Public/Cesium3DTileset.h

@@ -163,6 +163,26 @@ class CESIUMRUNTIME_API ACesium3DTileset : public AActor {
   UFUNCTION(BlueprintCallable, Category = "Cesium")
   void InvalidateResolvedGeoreference();
 
+  /**
+   * Returns the approximate Unreal Location of this tileset or a zero-Vector if
+   * the root tile is not available yet
+   */
+  UFUNCTION(
+      BlueprintCallable,
+      Category = "Cesium",
+      meta = (ReturnDisplayName = "approximate Unreal Location"))
+  FVector GetApproximateTilesetLocationUnreal(bool& rootTileAvailable);
+
+  /**
+   * Returns the approximate ECEF Location of this tileset or a zero-Vector if
+   * the root tile is not available yet
+   */
+  UFUNCTION(
+      BlueprintCallable,
+      Category = "Cesium",
+      meta = (ReturnDisplayName = "approximate ECEF Location"))
+  FVector GetApproximateTilesetLocationECEF(bool& rootTileAvailable);
+
 private:
   /**
    * The actor managing this tileset's content attributions.