From: David Wells Date: Sat, 17 Dec 2022 00:21:07 +0000 (-0500) Subject: BarycentricPolynomials: clean up implementation. X-Git-Tag: v9.5.0-rc1~659^2 X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8293d5652b90404b0e7e04fc2c8d236964f66d53;p=dealii.git BarycentricPolynomials: clean up implementation. --- diff --git a/source/base/polynomials_barycentric.cc b/source/base/polynomials_barycentric.cc index 4c899e2ee2..eb5601ccb8 100644 --- a/source/base/polynomials_barycentric.cc +++ b/source/base/polynomials_barycentric.cc @@ -13,9 +13,10 @@ // // --------------------------------------------------------------------- - #include +#include + DEAL_II_NAMESPACE_OPEN namespace internal @@ -60,35 +61,34 @@ BarycentricPolynomials::get_fe_p_basis(const unsigned int degree) { std::vector polys; - auto M = [](const unsigned int d) { - return BarycentricPolynomial::monomial(d); - }; + const auto reference_cell = ReferenceCells::get_simplex(); + switch (degree) { case 0: - polys.push_back(0 * M(0) + 1); + polys.push_back(0 * BarycentricPolynomial::monomial(0) + + 1); break; case 1: { - for (unsigned int d = 0; d < dim + 1; ++d) - polys.push_back(M(d)); + for (unsigned int v : reference_cell.vertex_indices()) + polys.push_back(BarycentricPolynomial::monomial(v)); break; } case 2: { - for (unsigned int d = 0; d < dim + 1; ++d) - polys.push_back(M(d) * (2 * M(d) - 1)); - polys.push_back(4 * M(1) * M(0)); - if (dim >= 2) - { - polys.push_back(4 * M(1) * M(2)); - polys.push_back(4 * M(2) * M(0)); - } - if (dim == 3) + // vertices, then lines: + for (unsigned int v : reference_cell.vertex_indices()) + polys.push_back( + BarycentricPolynomial::monomial(v) * + (2 * BarycentricPolynomial::monomial(v) - 1)); + for (unsigned int l : reference_cell.line_indices()) { - polys.push_back(4 * M(3) * M(0)); - polys.push_back(4 * M(1) * M(3)); - polys.push_back(4 * M(2) * M(3)); + const auto v0 = reference_cell.line_to_cell_vertices(l, 0); + const auto v1 = reference_cell.line_to_cell_vertices(l, 1); + polys.push_back(4 * + BarycentricPolynomial::monomial(v0) * + BarycentricPolynomial::monomial(v1)); } break; }