1 files changed, 4 insertions, 4 deletions
diff --git a/src/Coxeter_triangulation/include/gudhi/Functions/Function_whitney_umbrella_in_R3.h b/src/Coxeter_triangulation/include/gudhi/Functions/Function_whitney_umbrella_in_R3.h
index 3d825f8f..10ff53f3 100644
--- a/src/Coxeter_triangulation/include/gudhi/Functions/Function_whitney_umbrella_in_R3.h
+++ b/src/Coxeter_triangulation/include/gudhi/Functions/Function_whitney_umbrella_in_R3.h
@@ -33,7 +33,7 @@ struct Function_whitney_umbrella_in_R3 : public Function {
    * \brief Value of the function at a specified point.
    * @param[in] p The input point. The dimension needs to coincide with the ambient dimension.
    */
-  Eigen::VectorXd operator()(const Eigen::VectorXd& p) const {
+  virtual Eigen::VectorXd operator()(const Eigen::VectorXd& p) const override {
     double x = p(0)-off_[0], y = p(1)-off_[1], z = p(2)-off_[2];
     Eigen::VectorXd result(cod_d());
     result(0) = x*x - y*y*z;
@@ -41,16 +41,16 @@ struct Function_whitney_umbrella_in_R3 : public Function {
   }
 
   /** \brief Returns the (ambient) domain dimension.*/
-  std::size_t amb_d() const {return 3;};
+  virtual std::size_t amb_d() const override {return 3;};
 
   /** \brief Returns the codomain dimension. */
-  std::size_t cod_d() const {return 1;};
+  virtual std::size_t cod_d() const override {return 1;};
 
   /** \brief Returns a point on the surface. This seed point is only one of 
    * two necessary seed points for the manifold tracing algorithm.
    * See the method seed2() for the other point. 
    */
-  Eigen::VectorXd seed() const {
+  virtual Eigen::VectorXd seed() const override {
     Eigen::Vector3d result(1+off_[0], 1+off_[1], 1+off_[2]);
     return result;
   }