RealVectorValue _direction
central difference direction
virtual Real value(Real t, const Point &pt) const
returns the central difference approx to the derivative of the function, ie (f(t, p + direction) - f(...
DIE A HORRIBLE DEATH HERE typedef LIBMESH_DEFAULT_SCALAR_TYPE Real
static InputParameters validParams()
const InputParameters & parameters() const
virtual Real value(Real t, const Point &p) const
GradParsedFunction(const InputParameters ¶meters)