Actual source code: ex40.c
2: static char help[] = "Tests mirror boundary conditions in 2-d.\n\n";
4: #include <petscdm.h>
5: #include <petscdmda.h>
7: int main(int argc, char **argv)
8: {
9: PetscInt M = 8, N = 8, stencil_width = 1, dof = 1, m, n, xstart, ystart, i, j, c;
10: DM da;
11: Vec global, local;
12: PetscScalar ***vglobal;
13: PetscViewer sview;
16: PetscInitialize(&argc, &argv, (char *)0, help);
17: PetscOptionsGetInt(NULL, 0, "-stencil_width", &stencil_width, 0);
18: PetscOptionsGetInt(NULL, 0, "-dof", &dof, 0);
20: DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_MIRROR, DM_BOUNDARY_MIRROR, DMDA_STENCIL_STAR, M, N, PETSC_DECIDE, PETSC_DECIDE, dof, stencil_width, NULL, NULL, &da);
21: DMSetFromOptions(da);
22: DMSetUp(da);
23: DMDAGetCorners(da, &xstart, &ystart, 0, &m, &n, 0);
25: DMCreateGlobalVector(da, &global);
26: DMDAVecGetArrayDOF(da, global, &vglobal);
27: for (j = ystart; j < ystart + n; j++) {
28: for (i = xstart; i < xstart + m; i++) {
29: for (c = 0; c < dof; c++) vglobal[j][i][c] = 100 * j + 10 * (i + 1) + c;
30: }
31: }
32: DMDAVecRestoreArrayDOF(da, global, &vglobal);
34: DMCreateLocalVector(da, &local);
35: DMGlobalToLocalBegin(da, global, INSERT_VALUES, local);
36: DMGlobalToLocalEnd(da, global, INSERT_VALUES, local);
38: PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview);
39: VecView(local, sview);
40: PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview);
41: PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD);
42: VecView(global, PETSC_VIEWER_STDOUT_WORLD);
44: DMDestroy(&da);
45: VecDestroy(&local);
46: VecDestroy(&global);
48: PetscFinalize();
49: return 0;
50: }
52: /*TEST
54: test:
56: test:
57: suffix: 2
58: nsize: 4
59: filter: grep -v "Vec Object"
61: TEST*/