1a0154adeSJed Brown // Copyright (c) 2017-2022, Lawrence Livermore National Security, LLC and other CEED contributors. 2a0154adeSJed Brown // All Rights Reserved. See the top-level LICENSE and NOTICE files for details. 3a0154adeSJed Brown // 4a0154adeSJed Brown // SPDX-License-Identifier: BSD-2-Clause 5a0154adeSJed Brown // 6a0154adeSJed Brown // This file is part of CEED: http://github.com/ceed 7a0154adeSJed Brown 8a0154adeSJed Brown /** 9a0154adeSJed Brown @brief Ceed QFunction for building the geometric data for the 2D Poisson operator 10a0154adeSJed Brown **/ 11a0154adeSJed Brown 12a0154adeSJed Brown #ifndef poisson2dbuild_h 13a0154adeSJed Brown #define poisson2dbuild_h 14a0154adeSJed Brown 15*c9c2c079SJeremy L Thompson #include <ceed.h> 16*c9c2c079SJeremy L Thompson 17a0154adeSJed Brown CEED_QFUNCTION(Poisson2DBuild)(void *ctx, const CeedInt Q, 18a0154adeSJed Brown const CeedScalar *const *in, 19a0154adeSJed Brown CeedScalar *const *out) { 20a0154adeSJed Brown // At every quadrature point, compute w/det(J).adj(J).adj(J)^T and store 21a0154adeSJed Brown // the symmetric part of the result. 22a0154adeSJed Brown // *INDENT-OFF* 23a0154adeSJed Brown // in[0] is Jacobians with shape [2, nc=2, Q] 24a0154adeSJed Brown // in[1] is quadrature weights, size (Q) 25a0154adeSJed Brown const CeedScalar (*J)[2][CEED_Q_VLA] = (const CeedScalar(*)[2][CEED_Q_VLA])in[0], 26a0154adeSJed Brown *w = in[1]; 27a0154adeSJed Brown // out[0] is qdata, size (3*Q) 28a0154adeSJed Brown CeedScalar (*q_data)[CEED_Q_VLA] = (CeedScalar(*)[CEED_Q_VLA])out[0]; 29a0154adeSJed Brown // *INDENT-ON* 30a0154adeSJed Brown 31a0154adeSJed Brown // Quadrature point loop 32a0154adeSJed Brown CeedPragmaSIMD 33a0154adeSJed Brown for (CeedInt i=0; i<Q; i++) { 34a0154adeSJed Brown // Qdata stored in Voigt convention 35a0154adeSJed Brown // J: 0 2 q_data: 0 2 adj(J): J11 -J01 36a0154adeSJed Brown // 1 3 2 1 -J10 J00 37a0154adeSJed Brown const CeedScalar J00 = J[0][0][i]; 38a0154adeSJed Brown const CeedScalar J10 = J[0][1][i]; 39a0154adeSJed Brown const CeedScalar J01 = J[1][0][i]; 40a0154adeSJed Brown const CeedScalar J11 = J[1][1][i]; 41a0154adeSJed Brown const CeedScalar qw = w[i] / (J00*J11 - J10*J01); 42a0154adeSJed Brown q_data[0][i] = qw * (J01*J01 + J11*J11); 43a0154adeSJed Brown q_data[1][i] = qw * (J00*J00 + J10*J10); 44a0154adeSJed Brown q_data[2][i] = - qw * (J00*J01 + J10*J11); 45a0154adeSJed Brown } // End of Quadrature Point Loop 46a0154adeSJed Brown 47a0154adeSJed Brown return CEED_ERROR_SUCCESS; 48a0154adeSJed Brown } 49a0154adeSJed Brown 50a0154adeSJed Brown #endif // poisson2dbuild_h 51