1 // Copyright (c) 2017-2025, Lawrence Livermore National Security, LLC and other CEED contributors. 2 // All Rights Reserved. See the top-level LICENSE and NOTICE files for details. 3 // 4 // SPDX-License-Identifier: BSD-2-Clause 5 // 6 // This file is part of CEED: http://github.com/ceed 7 8 #include <ceed/types.h> 9 10 CEED_QFUNCTION(setup)(void *ctx, const CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) { 11 const CeedScalar *qw = in[0], *J = in[1]; 12 CeedScalar *qd = out[0]; 13 14 for (CeedInt i = 0; i < Q; i++) { 15 // Qdata stored in Voigt convention 16 // J: 0 2 qd: 0 2 adj(J): J22 -J12 17 // 1 3 2 1 -J21 J11 18 const CeedScalar J11 = J[i + Q * 0]; 19 const CeedScalar J21 = J[i + Q * 1]; 20 const CeedScalar J12 = J[i + Q * 2]; 21 const CeedScalar J22 = J[i + Q * 3]; 22 const CeedScalar w = qw[i] / (J11 * J22 - J21 * J12); 23 qd[i + Q * 0] = w * (J12 * J12 + J22 * J22); 24 qd[i + Q * 1] = w * (J11 * J11 + J21 * J21); 25 qd[i + Q * 2] = -w * (J11 * J12 + J21 * J22); 26 } // End of Quadrature Point Loop 27 return 0; 28 } 29 30 CEED_QFUNCTION(diff)(void *ctx, const CeedInt Q, const CeedScalar *const *in, CeedScalar *const *out) { 31 const CeedScalar *qd = in[0], *ug = in[1]; 32 CeedScalar *vg = out[0]; 33 34 for (CeedInt i = 0; i < Q; i++) { 35 // Read spatial derivatives of u 36 const CeedScalar du[2] = {ug[i + Q * 0], ug[i + Q * 1]}; 37 38 // Read qdata (dXdxdXdxT symmetric matrix) 39 // Stored in Voigt convention 40 // 0 2 41 // 2 1 42 const CeedScalar dXdxdXdxT[2][2] = { 43 {qd[i + 0 * Q], qd[i + 2 * Q]}, 44 {qd[i + 2 * Q], qd[i + 1 * Q]} 45 }; 46 // j = direction of vg 47 for (int j = 0; j < 2; j++) vg[i + j * Q] = (du[0] * dXdxdXdxT[0][j] + du[1] * dXdxdXdxT[1][j]); 48 } 49 return 0; 50 } 51