1 files changed, 4 insertions, 4 deletions
diff --git a/src/Coxeter_triangulation/include/gudhi/Functions/Function_chair_in_R3.h b/src/Coxeter_triangulation/include/gudhi/Functions/Function_chair_in_R3.h
index 2a76e631..26b62731 100644
--- a/src/Coxeter_triangulation/include/gudhi/Functions/Function_chair_in_R3.h
+++ b/src/Coxeter_triangulation/include/gudhi/Functions/Function_chair_in_R3.h
@@ -35,7 +35,7 @@ struct Function_chair_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) = std::pow(x*x + y*y + z*z - a_*k_*k_, 2) - b_*((z-k_)*(z-k_) - 2*x*x)*((z+k_)*(z+k_) - 2*y*y);
@@ -43,13 +43,13 @@ struct Function_chair_in_R3 : public Function {
   }
 
   /** \brief Returns the domain (ambient) 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. */
-  Eigen::VectorXd seed() const {
+  virtual Eigen::VectorXd seed() const override {
     double t1 = a_-b_;
     double discr = t1*t1 - (1.0 - b_)*(a_*a_ - b_);
     double z0 = k_*std::sqrt((t1+std::sqrt(discr))/(1-b_));