heavy refactoring

include/utils/Renderer/Renderer.h

@@ -13,21 +13,14 @@ namespace Archimedes {
 
             ~Renderer() {}
 
-            void init() { r.init(); }
+            bool init() { return r.init(); }
 
             void render() {
                 r.render(rc, w, h);
             }
 
-            std::list<renderCmd*>::iterator addRenderCmd(renderCmd* cmd) {
-                
-                auto it = rc.end();
-                rc.push_back(cmd);
-                return it;
-            }
-
-            void removeRenderCmd(std::list<renderCmd*>::iterator cmd) {
-                rc.erase(cmd);
+            std::list<renderCmd*>& getCmdList() {
+                return rc;
             }
 
         private:

include/utils/Renderer/RendererOpenGL/RendererOpenGL.h

@@ -17,7 +17,9 @@ namespace Archimedes {
             RendererOpenGL() {};
             ~RendererOpenGL() {};
 
-            void init() { glewInit(); };
+            bool init() { 
+                return glewInit() == GLEW_OK;
+            };
 
             void render(std::list<renderCmd*> cmdList, int& w, int& h) {