diff --git a/libraries/lib-engine/include/polymer-engine/renderer/renderer-debug.hpp b/libraries/lib-engine/include/polymer-engine/renderer/renderer-debug.hpp
index e83b61a..8ce45fe 100644
--- a/libraries/lib-engine/include/polymer-engine/renderer/renderer-debug.hpp
+++ b/libraries/lib-engine/include/polymer-engine/renderer/renderer-debug.hpp
@@ -10,6 +10,9 @@
 
 #include "polymer-engine/scene.hpp"
 
+// todo: refactor to inline shaders and make debug renderer a gl-component rather than being 
+// included in polymer-engine directly
+
 namespace polymer
 {
     class global_debug_mesh_manager : public singleton<global_debug_mesh_manager>
@@ -28,6 +31,7 @@ namespace polymer
 
         global_debug_mesh_manager() = default;
 
+
         void initialize_resources(entity_system_manager * esm, scene * the_scene)
         {
             debug_renderer_material = std::make_shared<polymer_procedural_material>();
@@ -126,6 +130,21 @@ namespace polymer
             }
         }
 
+        void draw_obb()
+        {
+            // todo
+        }
+
+        void draw_frustum()
+        {
+            // todo
+        }
+
+        void draw_text()
+        {
+            // todo
+        }
+
         void upload()
         {
             auto & debug_renderer_mesh = gpu_mesh_handle("debug-renderer").get();