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 bool is_at_points; 21 22 CeedInit(argv[1], &ceed); 23 24 CeedVectorCreate(ceed, dim * num_points, &x_points); 25 { 26 CeedScalar x_array[dim * num_points]; 27 28 for (CeedInt e = 0; e < num_elem; e++) { 29 for (CeedInt d = 0; d < dim; d++) { 30 x_array[num_points_per_elem * (e * dim + d) + 0] = 0.25; 31 x_array[num_points_per_elem * (e * dim + d) + 1] = d == 0 ? -0.25 : 0.25; 32 x_array[num_points_per_elem * (e * dim + d) + 2] = d == 0 ? 0.25 : -0.25; 33 x_array[num_points_per_elem * (e * dim + d) + 3] = 0.25; 34 } 35 } 36 CeedVectorSetArray(x_points, CEED_MEM_HOST, CEED_COPY_VALUES, x_array); 37 } 38 { 39 CeedInt ind_x[num_elem + 1 + num_points]; 40 41 for (CeedInt i = 0; i <= num_elem; i++) ind_x[i] = num_elem + 1 + i * num_points_per_elem; 42 for (CeedInt i = 0; i < num_points; i++) ind_x[num_elem + 1 + i] = i; 43 CeedElemRestrictionCreateAtPoints(ceed, num_elem, num_points, dim, num_points * dim, CEED_MEM_HOST, CEED_COPY_VALUES, ind_x, 44 &elem_restriction_x_points); 45 } 46 47 { 48 CeedInt ind_u[num_elem * p * p]; 49 50 for (CeedInt e = 0; e < num_elem; e++) { 51 CeedInt elem_xy[2] = {1, 1}, n_d[2] = {0, 0}; 52 53 for (CeedInt d = 0; d < dim; d++) n_d[d] = num_elem_1d * (p - 1) + 1; 54 { 55 CeedInt r_e = e; 56 57 for (CeedInt d = 0; d < dim; d++) { 58 elem_xy[d] = r_e % num_elem_1d; 59 r_e /= num_elem_1d; 60 } 61 } 62 CeedInt num_nodes_in_elem = p * p, *elem_nodes = ind_u + e * num_nodes_in_elem; 63 64 for (CeedInt n = 0; n < num_nodes_in_elem; n++) { 65 CeedInt g_node = 0, g_node_stride = 1, r_node = n; 66 67 for (CeedInt d = 0; d < dim; d++) { 68 g_node += (elem_xy[d] * (p - 1) + r_node % p) * g_node_stride; 69 g_node_stride *= n_d[d]; 70 r_node /= p; 71 } 72 elem_nodes[n] = g_node; 73 } 74 } 75 CeedElemRestrictionCreate(ceed, num_elem, p * p, 1, 1, num_nodes, CEED_MEM_HOST, CEED_COPY_VALUES, ind_u, &elem_restriction_u); 76 } 77 CeedBasisCreateTensorH1Lagrange(ceed, dim, 1, p, q, CEED_GAUSS, &basis_u); 78 79 CeedQFunctionCreateInterior(ceed, 1, mass, mass_loc, &qf_mass); 80 CeedQFunctionAddInput(qf_mass, "u", 1, CEED_EVAL_INTERP); 81 CeedQFunctionAddOutput(qf_mass, "v", 1, CEED_EVAL_INTERP); 82 83 CeedOperatorCreateAtPoints(ceed, qf_mass, CEED_QFUNCTION_NONE, CEED_QFUNCTION_NONE, &op_mass); 84 CeedOperatorSetField(op_mass, "u", elem_restriction_u, basis_u, CEED_VECTOR_ACTIVE); 85 CeedOperatorSetField(op_mass, "v", elem_restriction_u, basis_u, CEED_VECTOR_ACTIVE); 86 CeedOperatorAtPointsSetPoints(op_mass, elem_restriction_x_points, x_points); 87 88 CeedOperatorIsAtPoints(op_mass, &is_at_points); 89 if (!is_at_points) printf("Error: Operator should be at points\n"); 90 91 CeedVectorCreate(ceed, num_nodes, &u); 92 CeedVectorSetValue(u, 1.0); 93 CeedVectorCreate(ceed, num_nodes, &v); 94 CeedOperatorApply(op_mass, u, v, CEED_REQUEST_IMMEDIATE); 95 96 { 97 CeedScalar sum = 0.0; 98 const CeedScalar *v_array; 99 100 CeedVectorGetArrayRead(v, CEED_MEM_HOST, &v_array); 101 for (CeedInt i = 0; i < num_nodes; i++) sum += v_array[i]; 102 CeedVectorRestoreArrayRead(v, &v_array); 103 // Summing 9 reference elements, each 2x2 => 36 sq units area 104 if (fabs(sum - 4.0 * num_elem) > CEED_EPSILON * 5e3) printf("Incorrect area computed, %f != %f\n", sum, 4.0 * num_elem); 105 } 106 107 CeedVectorDestroy(&x_points); 108 CeedVectorDestroy(&u); 109 CeedVectorDestroy(&v); 110 CeedElemRestrictionDestroy(&elem_restriction_x_points); 111 CeedElemRestrictionDestroy(&elem_restriction_u); 112 CeedBasisDestroy(&basis_u); 113 CeedQFunctionDestroy(&qf_mass); 114 CeedOperatorDestroy(&op_mass); 115 CeedDestroy(&ceed); 116 return 0; 117 } 118