1 static char help[] = "Tests mirror boundary conditions in 2-d.\n\n"; 2 3 #include <petscdm.h> 4 #include <petscdmda.h> 5 6 int main(int argc, char **argv) 7 { 8 PetscInt M = 8, N = 8, stencil_width = 1, dof = 1, m, n, xstart, ystart, i, j, c; 9 DM da; 10 Vec global, local; 11 PetscScalar ***vglobal; 12 PetscViewer sview; 13 14 PetscFunctionBeginUser; 15 PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 16 PetscCall(PetscOptionsGetInt(NULL, 0, "-stencil_width", &stencil_width, 0)); 17 PetscCall(PetscOptionsGetInt(NULL, 0, "-dof", &dof, 0)); 18 19 PetscCall(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)); 20 PetscCall(DMSetFromOptions(da)); 21 PetscCall(DMSetUp(da)); 22 PetscCall(DMDAGetCorners(da, &xstart, &ystart, 0, &m, &n, 0)); 23 24 PetscCall(DMCreateGlobalVector(da, &global)); 25 PetscCall(DMDAVecGetArrayDOF(da, global, &vglobal)); 26 for (j = ystart; j < ystart + n; j++) { 27 for (i = xstart; i < xstart + m; i++) { 28 for (c = 0; c < dof; c++) vglobal[j][i][c] = 100 * j + 10 * (i + 1) + c; 29 } 30 } 31 PetscCall(DMDAVecRestoreArrayDOF(da, global, &vglobal)); 32 33 PetscCall(DMCreateLocalVector(da, &local)); 34 PetscCall(DMGlobalToLocalBegin(da, global, INSERT_VALUES, local)); 35 PetscCall(DMGlobalToLocalEnd(da, global, INSERT_VALUES, local)); 36 37 PetscCall(PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview)); 38 PetscCall(VecView(local, sview)); 39 PetscCall(PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview)); 40 PetscCall(PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD)); 41 PetscCall(VecView(global, PETSC_VIEWER_STDOUT_WORLD)); 42 43 PetscCall(DMDestroy(&da)); 44 PetscCall(VecDestroy(&local)); 45 PetscCall(VecDestroy(&global)); 46 47 PetscCall(PetscFinalize()); 48 return 0; 49 } 50 51 /*TEST 52 53 test: 54 55 test: 56 suffix: 2 57 nsize: 4 58 filter: grep -v "Vec Object" 59 60 TEST*/ 61