1 2 static char help[] = "Tests mirror boundary conditions in 2-d.\n\n"; 3 4 #include <petscdm.h> 5 #include <petscdmda.h> 6 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; 14 15 PetscFunctionBeginUser; 16 PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 17 PetscCall(PetscOptionsGetInt(NULL, 0, "-stencil_width", &stencil_width, 0)); 18 PetscCall(PetscOptionsGetInt(NULL, 0, "-dof", &dof, 0)); 19 20 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)); 21 PetscCall(DMSetFromOptions(da)); 22 PetscCall(DMSetUp(da)); 23 PetscCall(DMDAGetCorners(da, &xstart, &ystart, 0, &m, &n, 0)); 24 25 PetscCall(DMCreateGlobalVector(da, &global)); 26 PetscCall(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 PetscCall(DMDAVecRestoreArrayDOF(da, global, &vglobal)); 33 34 PetscCall(DMCreateLocalVector(da, &local)); 35 PetscCall(DMGlobalToLocalBegin(da, global, INSERT_VALUES, local)); 36 PetscCall(DMGlobalToLocalEnd(da, global, INSERT_VALUES, local)); 37 38 PetscCall(PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview)); 39 PetscCall(VecView(local, sview)); 40 PetscCall(PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview)); 41 PetscCall(PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD)); 42 PetscCall(VecView(global, PETSC_VIEWER_STDOUT_WORLD)); 43 44 PetscCall(DMDestroy(&da)); 45 PetscCall(VecDestroy(&local)); 46 PetscCall(VecDestroy(&global)); 47 48 PetscCall(PetscFinalize()); 49 return 0; 50 } 51 52 /*TEST 53 54 test: 55 56 test: 57 suffix: 2 58 nsize: 4 59 filter: grep -v "Vec Object" 60 61 TEST*/ 62