diff --git a/apps/sample/trimesh_pos_demo/trimesh_pos_demo.cpp b/apps/sample/trimesh_pos_demo/trimesh_pos_demo.cpp
new file mode 100644
index 00000000..d557ce8b
--- /dev/null
+++ b/apps/sample/trimesh_pos_demo/trimesh_pos_demo.cpp
@@ -0,0 +1,39 @@
+#include <vector>
+
+#include <vcg/simplex/vertexplus/base.h>   
+#include <vcg/simplex/vertexplus/component.h>   
+#include <vcg/simplex/faceplus/base.h>   
+#include <vcg/simplex/faceplus/component.h>   
+
+#include <vcg/complex/trimesh/base.h>   
+#include<vcg/complex/trimesh/create/platonic.h>
+
+#include <vcg/simplex/face/pos.h> 
+
+class MyEdge;
+class MyFace;
+
+class MyVertex: public vcg::VertexSimp2<MyVertex,MyEdge,MyFace, vcg::vert::Coord3d, vcg::vert::Normal3f>{};
+class MyFace: public vcg::FaceSimp2<MyVertex,MyEdge,MyFace, vcg::face::VertexRef,vcg::face::FFAdj>{};
+
+class MyMesh: public vcg::tri::TriMesh< std::vector<MyVertex>, std::vector<MyFace> > {};
+
+void OneRingNeighborhood( MyFace * f)
+{
+	MyVertex * v = f->V(0);  
+	MyFace* start = f;
+	vcg::face::Pos<MyFace> p(f,0,0);// constructor that takes face, edge and vertex
+	do
+	{
+		p.FlipF();
+		p.FlipE();
+	}while(p.f!=start);
+}
+
+int main()
+{
+	MyMesh m;
+	vcg::tri::Tetrahedron(m);
+	OneRingNeighborhood(&(*m.face.begin()));
+	return 0;
+}
\ No newline at end of file