diff --git a/sdlpp/sdlpp_scene.cpp b/sdlpp/sdlpp_scene.cpp
index 946918e..9c4edfc 100644
--- a/sdlpp/sdlpp_scene.cpp
+++ b/sdlpp/sdlpp_scene.cpp
@@ -113,7 +113,7 @@ Scene::getCollisions( RenderObject &r ) {
 }
 void Scene::visitCollisions( RenderObject &r, Visitor &v ) {
     for ( auto &collision : getCollisions( r ) ) {
-        v.fromId( collision.first );
+        v.setFromId( collision.first );
         collision.second->visit( v );
     }
 }
diff --git a/sdlpp/sdlpp_visitor.hpp b/sdlpp/sdlpp_visitor.hpp
index 8acb887..2cc1147 100644
--- a/sdlpp/sdlpp_visitor.hpp
+++ b/sdlpp/sdlpp_visitor.hpp
@@ -11,7 +11,10 @@ class SDLPPSCOPE Visitor {
 public:
     Visitor() {}
     virtual void visit( const RenderObject &obj ) = 0;
-    virtual void fromId( uint64_t id ) = 0;
+    virtual void setFromId( uint64_t id ) = 0;
+    virtual uint64_t getFromId() = 0;
+    virtual void setVisitorType( uint64_t type ) = 0;
+    virtual uint64_t getVisitorType() = 0;
 };
 
 } // namespace SDLPP