1 /// @file 2 /// Test creation, action, and destruction for mass matrix operator at points 3 /// \test Test creation, action, and destruction for mass matrix operator at points 4 #include "t590-operator.h" 5 6 #include <ceed.h> 7 #include <math.h> 8 #include <stdio.h> 9 #include <stdlib.h> 10 11 int main(int argc, char **argv) { 12 Ceed ceed; 13 CeedInt num_elem_1d = 3, num_elem = num_elem_1d * num_elem_1d, dim = 2, p = 3, q = 5; 14 CeedInt num_nodes = (num_elem_1d * (p - 1) + 1) * (num_elem_1d * (p - 1) + 1), num_points_per_elem = 4, num_points = num_elem * num_points_per_elem; 15 CeedVector x_points, u, v; 16 CeedElemRestriction elem_restriction_x_points, elem_restriction_u; 17 CeedBasis basis_u; 18 CeedQFunction qf_mass; 19 CeedOperator op_mass; 20 21 CeedInit(argv[1], &ceed); 22 23 CeedVectorCreate(ceed, dim * num_points, &x_points); 24 { 25 CeedScalar x_array[dim * num_points]; 26 27 for (CeedInt e = 0; e < num_elem; e++) { 28 for (CeedInt d = 0; d < dim; d++) { 29 x_array[num_points_per_elem * (e * dim + d) + 0] = 0.25; 30 x_array[num_points_per_elem * (e * dim + d) + 1] = d == 0 ? -0.25 : 0.25; 31 x_array[num_points_per_elem * (e * dim + d) + 2] = d == 0 ? 0.25 : -0.25; 32 x_array[num_points_per_elem * (e * dim + d) + 3] = 0.25; 33 } 34 } 35 CeedVectorSetArray(x_points, CEED_MEM_HOST, CEED_COPY_VALUES, x_array); 36 } 37 { 38 CeedInt ind_x[num_elem + 1 + num_points]; 39 40 for (CeedInt i = 0; i <= num_elem; i++) ind_x[i] = num_elem + 1 + i * num_points_per_elem; 41 for (CeedInt i = 0; i < num_points; i++) ind_x[num_elem + 1 + i] = i; 42 CeedElemRestrictionCreateAtPoints(ceed, num_elem, num_points, dim, num_points * dim, CEED_MEM_HOST, CEED_COPY_VALUES, ind_x, 43 &elem_restriction_x_points); 44 } 45 46 { 47 CeedInt ind_u[num_elem * p * p]; 48 49 for (CeedInt e = 0; e < num_elem; e++) { 50 CeedInt elem_xy[2] = {1, 1}, n_d[2] = {0, 0}; 51 52 for (CeedInt d = 0; d < dim; d++) n_d[d] = num_elem_1d * (p - 1) + 1; 53 { 54 CeedInt r_e = e; 55 56 for (CeedInt d = 0; d < dim; d++) { 57 elem_xy[d] = r_e % num_elem_1d; 58 r_e /= num_elem_1d; 59 } 60 } 61 CeedInt num_nodes_in_elem = p * p, *elem_nodes = ind_u + e * num_nodes_in_elem; 62 63 for (CeedInt n = 0; n < num_nodes_in_elem; n++) { 64 CeedInt g_node = 0, g_node_stride = 1, r_node = n; 65 66 for (CeedInt d = 0; d < dim; d++) { 67 g_node += (elem_xy[d] * (p - 1) + r_node % p) * g_node_stride; 68 g_node_stride *= n_d[d]; 69 r_node /= p; 70 } 71 elem_nodes[n] = g_node; 72 } 73 } 74 CeedElemRestrictionCreate(ceed, num_elem, p * p, 1, 1, num_nodes, CEED_MEM_HOST, CEED_COPY_VALUES, ind_u, &elem_restriction_u); 75 } 76 CeedBasisCreateTensorH1Lagrange(ceed, dim, 1, p, q, CEED_GAUSS, &basis_u); 77 78 CeedQFunctionCreateInterior(ceed, 1, mass, mass_loc, &qf_mass); 79 CeedQFunctionAddInput(qf_mass, "u", 1, CEED_EVAL_INTERP); 80 CeedQFunctionAddOutput(qf_mass, "v", 1, CEED_EVAL_INTERP); 81 82 CeedOperatorCreateAtPoints(ceed, qf_mass, CEED_QFUNCTION_NONE, CEED_QFUNCTION_NONE, &op_mass); 83 CeedOperatorSetField(op_mass, "u", elem_restriction_u, basis_u, CEED_VECTOR_ACTIVE); 84 CeedOperatorSetField(op_mass, "v", elem_restriction_u, basis_u, CEED_VECTOR_ACTIVE); 85 CeedOperatorAtPointsSetPoints(op_mass, elem_restriction_x_points, x_points); 86 87 CeedVectorCreate(ceed, num_nodes, &u); 88 CeedVectorSetValue(u, 1.0); 89 CeedVectorCreate(ceed, num_nodes, &v); 90 CeedOperatorApply(op_mass, u, v, CEED_REQUEST_IMMEDIATE); 91 92 { 93 CeedScalar sum = 0.0; 94 const CeedScalar *v_array; 95 96 CeedVectorGetArrayRead(v, CEED_MEM_HOST, &v_array); 97 for (CeedInt i = 0; i < num_nodes; i++) sum += v_array[i]; 98 CeedVectorRestoreArrayRead(v, &v_array); 99 // Summing 9 reference elements, each 2x2 => 36 sq units area 100 if (fabs(sum - 4.0 * num_elem) > CEED_EPSILON * 5e3) printf("Incorrect area computed, %f != %f\n", sum, 4.0 * num_elem); 101 } 102 103 CeedVectorDestroy(&x_points); 104 CeedVectorDestroy(&u); 105 CeedVectorDestroy(&v); 106 CeedElemRestrictionDestroy(&elem_restriction_x_points); 107 CeedElemRestrictionDestroy(&elem_restriction_u); 108 CeedBasisDestroy(&basis_u); 109 CeedQFunctionDestroy(&qf_mass); 110 CeedOperatorDestroy(&op_mass); 111 CeedDestroy(&ceed); 112 return 0; 113 } 114