1 2 static char help[] = "Tests mirror boundary conditions in 3-d.\n\n"; 3 4 #include <petscdm.h> 5 #include <petscdmda.h> 6 7 int main(int argc, char **argv) 8 { 9 PetscInt M = 2, N = 3, P = 4, stencil_width = 1, dof = 1, m, n, p, xstart, ystart, zstart, i, j, k, c; 10 DM da; 11 Vec global, local; 12 PetscScalar ****vglobal; 13 PetscViewer sview; 14 PetscScalar sum; 15 16 PetscFunctionBeginUser; 17 PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 18 PetscCall(PetscOptionsGetInt(NULL, 0, "-stencil_width", &stencil_width, 0)); 19 PetscCall(PetscOptionsGetInt(NULL, 0, "-dof", &dof, 0)); 20 21 PetscCall(DMDACreate3d(PETSC_COMM_WORLD, DM_BOUNDARY_MIRROR, DM_BOUNDARY_MIRROR, DM_BOUNDARY_MIRROR, DMDA_STENCIL_STAR, M, N, P, PETSC_DECIDE, PETSC_DECIDE, PETSC_DECIDE, dof, stencil_width, NULL, NULL, NULL, &da)); 22 PetscCall(DMSetFromOptions(da)); 23 PetscCall(DMSetUp(da)); 24 PetscCall(DMDAGetCorners(da, &xstart, &ystart, &zstart, &m, &n, &p)); 25 26 PetscCall(DMCreateGlobalVector(da, &global)); 27 PetscCall(DMDAVecGetArrayDOF(da, global, &vglobal)); 28 for (k = zstart; k < zstart + p; k++) { 29 for (j = ystart; j < ystart + n; j++) { 30 for (i = xstart; i < xstart + m; i++) { 31 for (c = 0; c < dof; c++) vglobal[k][j][i][c] = 1000 * k + 100 * j + 10 * i + c; 32 } 33 } 34 } 35 PetscCall(DMDAVecRestoreArrayDOF(da, global, &vglobal)); 36 37 PetscCall(DMCreateLocalVector(da, &local)); 38 PetscCall(DMGlobalToLocalBegin(da, global, ADD_VALUES, local)); 39 PetscCall(DMGlobalToLocalEnd(da, global, ADD_VALUES, local)); 40 41 PetscCall(VecSum(local, &sum)); 42 PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "sum %g\n", (double)PetscRealPart(sum))); 43 PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD, stdout)); 44 PetscCall(PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview)); 45 PetscCall(VecView(local, sview)); 46 PetscCall(PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD, PETSC_COMM_SELF, &sview)); 47 PetscCall(PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD)); 48 49 PetscCall(DMDestroy(&da)); 50 PetscCall(VecDestroy(&local)); 51 PetscCall(VecDestroy(&global)); 52 53 PetscCall(PetscFinalize()); 54 return 0; 55 } 56 57 /*TEST 58 59 test: 60 61 test: 62 suffix: 2 63 nsize: 3 64 65 TEST*/ 66