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