Add code to allow for depth buffer query (Fixes #18)

openVulkanoCpp/Base/Render/IRenderer.hpp

@@ -35,5 +35,8 @@ namespace OpenVulkano
 		virtual Scene::UI::Ui* GetActiveUi() = 0;
 
 		virtual IResourceManager* GetIResourceManager() = 0;
+
+		virtual float GetLastQueriedDepthValue() = 0;
+		virtual void SetQueryDepthValue(const Math::Vector2f& depthCoordinates) = 0;
 	};
 }