An instance of this class represents a point in a triangular face of a domain of type E. In addition to the usual data for a point in such a domain, it has some additional fields that only make sense relative to the containing face.
Extends: E_pointThe (generalised) barycentric coordinates of the point, relative to the containing face. This is a list of three nonnegative scalars, whose sum is one.
Field: ibj::scalar = 0This field is the Jacobian of the inverse of the barycentric coordinate map. (TODO: clarify the normalisation conditions.)
Field: quadrature_weight::scalarThis will be set in such a way that the integral (with respect to metric area) of a function on the face can be approximated by the sum of the values at the sample points multiplied by the corresponding quadrature weights