Added functions / enum necessary for P2DT2 to be usable in 2D Alpha Shapes

Periodic_2_triangulation_2/include/CGAL/Periodic_2_triangulation_2.h

@@ -83,8 +83,10 @@ public:
 
   /// The point type
   typedef typename Gt::Point_2 Point;
-  /// The segment type
+  /// The vector type
   typedef typename Gt::Segment_2 Segment;
+  /// The segment type
+  typedef typename Gt::Vector_2 Vector;
   /// The triangle type
   typedef typename Gt::Triangle_2 Triangle;
 
@@ -175,8 +177,15 @@ public:
     FACE,
     /// The query point lies outside the affine hull of the triangulation,
     /// which is the case when the triangulation is empty.
-    EMPTY
+    EMPTY,
+    OUTSIDE_CONVEX_HULL, // unused, for compatibility with Alpha_shape_2
+    OUTSIDE_AFFINE_HULL  // unused, for compatibility with Alpha_shape_2
   };
+
+  /// Returns false, no infinite simplices in the periodic triangulation
+  template<class T>
+  bool is_infinite(const T&, int = 0) const { return false; }
+
   //\}
 
   // Auxiliary iterators for convenience

Periodic_2_triangulation_2/test/Periodic_2_triangulation_2/test_p2t2_triangulation_point_location.cpp

@@ -45,7 +45,7 @@ Face_handle test_point_location(const Triangulation &t,
       CGAL_assertion(os == CGAL::ON_POSITIVE_SIDE);
       break;
     }
-    case Triangulation::EMPTY:
+    default:
     {
       // Handled above
       CGAL_assertion(false);