Fix prefab preview to wait for the assets streaming

Source/Engine/Level/Actors/AnimatedModel.cpp

@@ -1332,6 +1332,11 @@ MaterialBase* AnimatedModel::GetMaterial(int32 entryIndex)
     return material;
 }
 
+ModelBase* AnimatedModel::GetModel()
+{
+    return SkinnedModel.Get();
+}
+
 bool AnimatedModel::IntersectsEntry(int32 entryIndex, const Ray& ray, Real& distance, Vector3& normal)
 {
     auto model = SkinnedModel.Get();

Source/Engine/Level/Actors/AnimatedModel.h

@@ -476,6 +476,7 @@ public:
     void Deserialize(DeserializeStream& stream, ISerializeModifier* modifier) override;
     const Span<MaterialSlot> GetMaterialSlots() const override;
     MaterialBase* GetMaterial(int32 entryIndex) override;
+    ModelBase* GetModel() override;
     bool IntersectsEntry(int32 entryIndex, const Ray& ray, Real& distance, Vector3& normal) override;
     bool IntersectsEntry(const Ray& ray, Real& distance, Vector3& normal, int32& entryIndex) override;
     bool GetMeshData(const MeshReference& ref, MeshBufferType type, BytesContainer& result, int32& count, GPUVertexLayout** layout) const override;

Source/Engine/Level/Actors/ModelInstanceActor.h

@@ -66,6 +66,11 @@ public:
     /// <param name="entryIndex">The material slot entry index.</param>
     API_FUNCTION(Sealed) virtual MaterialBase* GetMaterial(int32 entryIndex) = 0;
 
+    /// <summary>
+    /// Gets the model (base class).
+    /// </summary>
+    API_FUNCTION(Sealed) virtual ModelBase* GetModel() = 0;
+
     /// <summary>
     /// Sets the material to the entry slot. Can be used to override the material of the meshes using this slot.
     /// </summary>

Source/Engine/Level/Actors/SplineModel.cpp

@@ -367,6 +367,11 @@ MaterialBase* SplineModel::GetMaterial(int32 entryIndex)
     return material;
 }
 
+ModelBase* SplineModel::GetModel()
+{
+    return Model.Get();
+}
+
 void SplineModel::UpdateBounds()
 {
     OnSplineUpdated();

Source/Engine/Level/Actors/SplineModel.h

@@ -117,6 +117,7 @@ public:
     void OnParentChanged() override;
     const Span<MaterialSlot> GetMaterialSlots() const override;
     MaterialBase* GetMaterial(int32 entryIndex) override;
+    ModelBase* GetModel() override;
     void UpdateBounds() override;
 
 protected:

Source/Engine/Level/Actors/StaticModel.cpp

@@ -599,6 +599,11 @@ MaterialBase* StaticModel::GetMaterial(int32 entryIndex)
     return material;
 }
 
+ModelBase* StaticModel::GetModel()
+{
+    return Model.Get();
+}
+
 bool StaticModel::IntersectsEntry(int32 entryIndex, const Ray& ray, Real& distance, Vector3& normal)
 {
     auto model = Model.Get();

Source/Engine/Level/Actors/StaticModel.h

@@ -178,6 +178,7 @@ public:
     void Deserialize(DeserializeStream& stream, ISerializeModifier* modifier) override;
     const Span<MaterialSlot> GetMaterialSlots() const override;
     MaterialBase* GetMaterial(int32 entryIndex) override;
+    ModelBase* GetModel() override;
     bool IntersectsEntry(int32 entryIndex, const Ray& ray, Real& distance, Vector3& normal) override;
     bool IntersectsEntry(const Ray& ray, Real& distance, Vector3& normal, int32& entryIndex) override;
     bool GetMeshData(const MeshReference& ref, MeshBufferType type, BytesContainer& result, int32& count, GPUVertexLayout** layout) const override;