Make step-53 compatible with the new interface.

diff --git a/examples/step-53/step-53.cc b/examples/step-53/step-53.cc
index d0a0b5608281bee20281d1800ce17bf848a963d6..eb2035251776038dffdc23264ed5feaa8ce9d7e5 100644 (file)
--- a/examples/step-53/step-53.cc
+++ b/examples/step-53/step-53.cc
@@ -210,11 +210,13 @@ namespace Step53
   public:
     virtual
     Point<3>
-    pull_back(const Point<3> &space_point) const;
+    pull_back(const Point<3> &space_point) const override;
 
     virtual
     Point<3>
-    push_forward(const Point<3> &chart_point) const;
+    push_forward(const Point<3> &chart_point) const override;
+
+    virtual std::unique_ptr<Manifold<3,3> > clone() const override;
 
   private:
     static const double    R;
@@ -251,6 +253,15 @@ namespace Step53
   }
 
 
+  // This function is required by the interface of the Manifold base
+  // class, and allows you to clone the AfricaGeometry class:
+  std::unique_ptr<Manifold<3,3> >
+  AfricaGeometry::clone() const
+  {
+    return std::unique_ptr<Manifold<3,3> >(new AfricaGeometry());
+  }
+
+
   // The following two functions then define the forward and inverse
   // transformations that correspond to the WGS 84 reference shape of
   // Earth. The forward transform follows the formula shown in the