SHADE_Engine/src/Graphics/MiddleEnd/Interface/SHMaterial.h

@@ -17,6 +17,7 @@ of DigiPen Institute of Technology is prohibited.
 // Project Includes
 #include "Resource/SHHandle.h"
 #include "SHCommonTypes.h"
+#include "SH_API.h"
 
 namespace SHADE
 {
@@ -35,7 +36,7 @@ namespace SHADE
 		Describes a Pipeline along with it's associated properties for this instance.
 	*/
 	/***********************************************************************************/
-	class SHMaterial
+	class SH_API SHMaterial
 	{
 	  public:
 		/*-----------------------------------------------------------------------------*/

SHADE_Engine/src/Graphics/MiddleEnd/Interface/SHMaterialInstance.h

@@ -43,9 +43,9 @@ namespace SHADE
     /*-----------------------------------------------------------------------------*/
     struct OverrideData
     {
-      size_t Index;
+      uint32_t Index;
-      size_t DataSize;
+      uint32_t DataSize;
-      size_t StoredDataOffset;
+      uint32_t StoredDataOffset;
     };
 
     /*-----------------------------------------------------------------------------*/

SHADE_Engine/src/Graphics/MiddleEnd/Interface/SHMaterialInstance.hpp

@@ -11,6 +11,7 @@ of DigiPen Institute of Technology is prohibited.
 *//*************************************************************************************/
 #pragma once
 #include "SHMaterialInstance.h"
+#include "SHMaterial.h"
 
 namespace SHADE
 {
@@ -34,9 +35,20 @@ namespace SHADE
       dataStore.reset(new char[dataStoreSize]);
     }
 
+    // Check if this was stored before
+    const uint32_t VAR_IDX = SHADER_INFO->GetVariableIndex(key);
+    auto existingOverride = std::find_if(overrideData.begin(), overrideData.end(), [&](const OverrideData& od)
+    {
+        return od.Index == VAR_IDX;
+    });
+    
+    // Otherwise, create it
+    if (existingOverride == overrideData.end())
+    {
       OverrideData od;
-    od.Index = SHADER_INFO->GetVariableIndex(key);
+      od.Index = VAR_IDX;
       od.DataSize = sizeof(T);
+
       if (overrideData.empty())
       {
         od.StoredDataOffset = 0;
@@ -47,12 +59,14 @@ namespace SHADE
         od.StoredDataOffset = lastInsertedData.StoredDataOffset + lastInsertedData.DataSize;
       }
 
-    // Get offset and modify the memory directly
-    T* dataPtr = reinterpret_cast<T*>(dataStore.get() + od.StoredDataOffset);
-    *dataPtr = value;
-
       // Save the override data information
       overrideData.emplace_back(std::move(od));
+      existingOverride = overrideData.end() - 1;
+    }
+
+    // Get offset and modify the memory directly
+    T* dataPtr = reinterpret_cast<T*>(dataStore.get() + existingOverride->StoredDataOffset);
+    *dataPtr = value;
     
     // Flag
 	dataWasChanged = true;
@@ -73,8 +87,19 @@ namespace SHADE
     {
       return PROP_IDX == data.Index;
     });
+
+    // No overrides, we get from the base material instead
     if (prop == overrideData.end())
+    {
+      if (baseMaterial)
+      {
+        return baseMaterial->GetProperty<T>(key);
+      }
+      else
+      {
         throw std::invalid_argument("Attempted to get an property that was not set previously!");
+      }
+    }
 
     // Get offset and return the memory directly
     T* dataPtr = reinterpret_cast<T*>(dataStore.get() + prop->StoredDataOffset);

SHADE_Engine/src/Graphics/MiddleEnd/Interface/SHRenderable.cpp

@@ -91,6 +91,7 @@ namespace SHADE
     {
       SHGraphicsSystem* gfxSystem = SHSystemManager::GetSystem<SHGraphicsSystem>();
       material = gfxSystem->AddMaterialInstanceCopy(sharedMaterial);
+      matChanged = true;
     }
 
     return material;