text: #ifndef FEA_ELEMENT_QUADRILATERAL
  #define FEA_ELEMENT_QUADRILATERAL
  
  #include <array>
  #include <vector>
  
  #include "../euclid/Geometry"
  
  namespace fea {
  
  using std::array;
  using std::vector;
  using Euclid::Point;
  
  class Quad
  {
  	array<Point,4> nodes;
  
  	public:
  	Quad (	array<Point,4> p ) : nodes(p) {};
  
  }; // class Quad
  
  } // namespace fea
  
  #endif
  