#include <ElementIntegrator.hpp>
Gaussian integrator on the triangle determined by the vertices (0, 0), (1, 0), (0, 1). TriangleIntegrator<1, 1> is used as element integrator in fem_2d_triangle_types. TriangleIntegrator is currently implemented for N_NODES = 1, 4, 7. You will rarely use this class directly, but might plug it into your own FE traits class as integrator_t or boundary_integrator_t.