Add default Deformable material for splines

Source/Editor/Cooker/Steps/DeployDataStep.cpp

@@ -74,6 +74,7 @@ bool DeployDataStep::Perform(CookingData& data)
     data.AddRootEngineAsset(TEXT("Shaders/SSR"));
     data.AddRootEngineAsset(TEXT("Shaders/VolumetricFog"));
     data.AddRootEngineAsset(TEXT("Engine/DefaultMaterial"));
+    data.AddRootEngineAsset(TEXT("Engine/DefaultDeformableMaterial"));
     data.AddRootEngineAsset(TEXT("Engine/DefaultTerrainMaterial"));
     if (!gameSettings->NoSplashScreen && !gameSettings->SplashScreen.IsValid())
         data.AddRootEngineAsset(TEXT("Engine/Textures/Logo"));

Source/Engine/Graphics/GPUDevice.cpp

@@ -18,6 +18,7 @@
 #include "Engine/Profiler/Profiler.h"
 #include "Engine/Renderer/RenderList.h"
 #include "Engine/Core/Utilities.h"
+#include "Engine/Scripting/SoftObjectReference.h"
 
 GPUPipelineState* GPUPipelineState::Spawn(const SpawnParams& params)
 {
@@ -127,6 +128,7 @@ struct GPUDevice::PrivateData
     GPUPipelineState* PS_Clear = nullptr;
     GPUBuffer* FullscreenTriangleVB = nullptr;
     AssetReference<Material> DefaultMaterial;
+    SoftObjectReference<Material> DefaultDeformableMaterial;
     AssetReference<Texture> DefaultNormalMap;
     AssetReference<Texture> DefaultWhiteTexture;
     AssetReference<Texture> DefaultBlackTexture;
@@ -206,6 +208,7 @@ bool GPUDevice::LoadContent()
     _res->DefaultMaterial = Content::LoadAsyncInternal<Material>(TEXT("Engine/DefaultMaterial"));
     if (_res->DefaultMaterial == nullptr)
         return true;
+    _res->DefaultDeformableMaterial = Guid(0x639e12c0, 0x42d34bae, 0x89dd8b81, 0x7e1efc2d);
 
     // Load default normal map
     _res->DefaultNormalMap = Content::LoadAsyncInternal<Texture>(TEXT("Engine/Textures/NormalTexture"));
@@ -231,6 +234,7 @@ void GPUDevice::preDispose()
 
     // Release resources
     _res->DefaultMaterial = nullptr;
+    _res->DefaultDeformableMaterial = nullptr;
     _res->DefaultNormalMap = nullptr;
     _res->DefaultWhiteTexture = nullptr;
     _res->DefaultBlackTexture = nullptr;
@@ -380,6 +384,11 @@ MaterialBase* GPUDevice::GetDefaultMaterial() const
     return _res->DefaultMaterial;
 }
 
+MaterialBase* GPUDevice::GetDefaultDeformableMaterial() const
+{
+    return _res->DefaultDeformableMaterial.Get();
+}
+
 GPUTexture* GPUDevice::GetDefaultNormalMap() const
 {
     return _res->DefaultNormalMap ? _res->DefaultNormalMap->GetTexture() : nullptr;

Source/Engine/Graphics/GPUDevice.h

@@ -234,6 +234,11 @@ public:
     /// </summary>
     MaterialBase* GetDefaultMaterial() const;
 
+    /// <summary>
+    /// Gets the default material (Deformable domain).
+    /// </summary>
+    MaterialBase* GetDefaultDeformableMaterial() const;
+
     /// <summary>
     /// Gets the default normal map texture.
     /// </summary>

Source/Engine/Level/Actors/SplineModel.cpp

@@ -408,7 +408,7 @@ void SplineModel::Draw(RenderContext& renderContext)
             else if (slot.Material && slot.Material->IsLoaded())
                 material = slot.Material;
             else
-                material = nullptr;
+                material = GPUDevice::Instance->GetDefaultDeformableMaterial();
             if (!material || !material->IsDeformable())
                 continue;
 

Source/Engine/Scripting/SoftObjectReference.h

@@ -311,9 +311,10 @@ public:
     /// Sets the object.
     /// </summary>
     /// <param name="id">The object ID. Uses Scripting to find the registered object of the given ID.</param>
-    FORCE_INLINE void Set(const Guid& id)
+    void Set(const Guid& id)
     {
-        Set(static_cast<T*>(FindObject(id, T::GetStaticClass())));
+        _id = id;
+        _object = nullptr;
     }
 
     /// <summary>