#include <ElementIntegrator.hpp>
Gaussian integrator on the cube [-1, 1] x [-1, 1] x [-1,1] with N nodes. SquareIntegrator<3, 8> is used as element integrator in fem_3d_cube_types. CubeIntegrator is currently only implemented for N_NODES = 4. You will rarely use this class directly, but might plug it into your own FE traits class as integrator_t or boundary_integrator_t.