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
main(int argc,char ** argv)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