diff --git a/BaseObj.cpp b/BaseObj.cpp
index b2f5450..66e6fac 100644
--- a/BaseObj.cpp
+++ b/BaseObj.cpp
@@ -27,6 +27,11 @@
     return mID;
 }
 
+void * BaseObj::getObjID(const BaseObj *o) {
+    return o == NULL ? NULL : o->getID();
+}
+
+
 BaseObj::BaseObj(void *id, RenderScript *rs) {
     mRS = rs;
     mID = id;