1 files changed, 3 insertions, 1 deletions
diff --git a/VertexProvider.h b/VertexProvider.h
index 101098e..a1ec4eb 100644
--- a/VertexProvider.h
+++ b/VertexProvider.h
@@ -4,6 +4,8 @@
 #include "Vertex.h"
 
 
+class LevelVertex;
+
 class VertexProvider {
   public:
     virtual ~VertexProvider() {}
@@ -15,7 +17,7 @@ class VertexProvider {
     virtual void rotateVertex(size_t id, Vertex m, float a) {}
     
     virtual bool canConnectVertex(size_t id) const {return false;}
-    virtual void connectVertex(size_t id) {}
+    virtual size_t connectVertex(size_t id) {return id;}
 };
 
 #endif /*VERTEXPROVIDER_H_*/