add VertexRef

WFObj.h

@@ -72,6 +72,15 @@ protected:
         float data[4];
     };
 
+    class VertexRef
+    {
+        public:
+            VertexRef() : vertex(0), texture(0), normal(0) {}
+            int vertex;
+            int texture;
+            int normal;
+    };
+
     /* methods */
     void clear();
     void processInputLine(const std::string & input);