refactor Cbuf for increased extensibility

hw3d/TransformCbuf.cpp

@@ -14,17 +14,25 @@ namespace Bind
 
 	void TransformCbuf::Bind( Graphics& gfx ) noexcept
 	{
-		const auto modelView = parent.GetTransformXM() * gfx.GetCamera();
-		const Transforms tf =
+		UpdateBindImpl( gfx,GetTransforms( gfx ) );
+	}
+
+	void TransformCbuf::UpdateBindImpl( Graphics& gfx,const Transforms& tf ) noexcept
 	{
+		pVcbuf->Update( gfx,tf );
+		pVcbuf->Bind( gfx );
+	}
+
+	TransformCbuf::Transforms TransformCbuf::GetTransforms( Graphics& gfx ) noexcept
+	{
+		const auto modelView = parent.GetTransformXM() * gfx.GetCamera();
+		return {
 			DirectX::XMMatrixTranspose( modelView ),
 			DirectX::XMMatrixTranspose(
 				modelView *
 				gfx.GetProjection()
 			)
 		};
-		pVcbuf->Update( gfx,tf );
-		pVcbuf->Bind( gfx );
 	}
 
 	std::unique_ptr<VertexConstantBuffer<TransformCbuf::Transforms>> TransformCbuf::pVcbuf;

hw3d/TransformCbuf.h

@@ -7,15 +7,18 @@ namespace Bind
 {
 	class TransformCbuf : public Bindable
 	{
-	private:
+	protected:
 		struct Transforms
 		{
+			DirectX::XMMATRIX modelView;
 			DirectX::XMMATRIX modelViewProj;
-			DirectX::XMMATRIX model;
 		};
 	public:
 		TransformCbuf( Graphics& gfx,const Drawable& parent,UINT slot = 0u );
 		void Bind( Graphics& gfx ) noexcept override;
+	protected:
+		void UpdateBindImpl( Graphics& gfx,const Transforms& tf ) noexcept;
+		Transforms GetTransforms( Graphics& gfx ) noexcept;
 	private:
 		static std::unique_ptr<VertexConstantBuffer<Transforms>> pVcbuf;
 		const Drawable& parent;