Refactored dx12 to use c++ versions of the api and not C + various tweaks (using antigravity + gemini)

Assets/source/RootConstants.hlsl

@@ -5,7 +5,12 @@ cbuffer RootConstants : register(b0, space0)
 {
     row_major float4x4 ViewProjection;
     uint     BufferIndex;
-    uint     _Padding[3]; 
+    uint     TextureIndex; 
+    uint     VertexOffset; // Base vertex for indexed drawing with bindless buffers
+    uint     _Padding;     // Padding for alignment
+    float2   Scale;        // 2D scale factor
+    float2   Translate;    // 2D translation
 };
 
+
 #endif // ROOT_CONSTANTS_HLSL