added NextNotFaux function

vcg/simplex/face/pos.h

@@ -263,12 +263,39 @@ public:
         assert(f->FFp(z)==f); // f is border along j
     }
 
+    /// Finds the next half-edge border
+    void NextNotFaux( )
+    {
+        assert(f->V(f->Prev(z))!=v && (f->V(f->Next(z))==v || f->V(z)==v));
+        //assert(f->FFp(z)==f); // f is border along j
+        // Si deve cambiare faccia intorno allo stesso vertice v
+        //finche' non si trova una faccia di bordo.
+        do
+        {
+            FlipE();
+            if (IsFaux()) FlipF();
+        }
+        while(IsFaux());
+
+        // L'edge j e' di bordo e deve contenere v
+        assert((!IsFaux()) &&( f->V(z)==v || f->V(f->Next(z))==v ));
+
+        FlipV();
+        assert(f->V(f->Prev(z))!=v && (f->V(f->Next(z))==v || f->V(z)==v));
+        //assert(f->FFp(z)==f); // f is border along j
+    }
+
     /// Checks if the half-edge is of border
     bool IsBorder()
     {
         return face::IsBorder(*f,z);
     }
 
+    bool IsFaux()
+    {
+        return (f->IsF(z));
+    }
+
     bool IsManifold()
     {
         return face::IsManifold(*f,z);