[MaL] Make TemplatePoint::_x a private member.

Using (const) access functions in two cases of direct
member access.

Applications/FileIO/Gmsh/GMSHPoint.cpp

@@ -25,8 +25,8 @@ GMSHPoint::GMSHPoint(GeoLib::Point const& pnt, std::size_t id,
 
 void GMSHPoint::write(std::ostream& os) const
 {
-    os << "Point(" << getID() << ") = {" << _x[0] << ", " << _x[1] << ", "
-       << _x[2];
+    os << "Point(" << getID() << ") = {" << (*this)[0] << ", " << (*this)[1]
+       << ", " << (*this)[2];
     if (fabs(_mesh_density) > std::numeric_limits<double>::epsilon())
     {
         os << ", " << _mesh_density << "};";

MathLib/TemplatePoint.h

@@ -95,7 +95,7 @@ public:
         std::copy(std::istream_iterator<T>(is), std::istream_iterator<T>(), _x.begin());
     }
 
-protected:
+private:
     std::array<T, DIM> _x;
 };
 

MeshLib/Node.cpp

@@ -34,13 +34,13 @@ Node::Node(double x, double y, double z, std::size_t id)
 {
 }
 
-Node::Node(const Node& node) : MathLib::Point3dWithID(node._x, node.getID()) {}
+Node::Node(const Node& node) : MathLib::Point3dWithID(node, node.getID()) {}
 
 void Node::updateCoordinates(double x, double y, double z)
 {
-    _x[0] = x;
-    _x[1] = y;
-    _x[2] = z;
+    (*this)[0] = x;
+    (*this)[1] = y;
+    (*this)[2] = z;
 
     const std::size_t nElements(this->_elements.size());
     for (std::size_t i = 0; i < nElements; i++)