1 2 static char help[] = "Tests various 2-dimensional DMDA routines.\n\n"; 3 4 #include <petscdmda.h> 5 #include <petscdraw.h> 6 7 int main(int argc, char **argv) 8 { 9 PetscInt M = 10, N = 8, dof = 1, s = 1, bx = 0, by = 0, i, n, j, k, m, wrap, xs, ys; 10 DM da, dac; 11 PetscViewer viewer; 12 Vec local, global, coors; 13 PetscScalar ***xy, ***aglobal; 14 PetscDraw draw; 15 char fname[32]; 16 17 PetscFunctionBeginUser; 18 PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 19 /* Create viewers */ 20 PetscCall(PetscViewerDrawOpen(PETSC_COMM_WORLD, 0, "", PETSC_DECIDE, PETSC_DECIDE, 600, 200, &viewer)); 21 PetscCall(PetscViewerDrawGetDraw(viewer, 0, &draw)); 22 PetscCall(PetscDrawSetDoubleBuffer(draw)); 23 24 /* Read options */ 25 PetscCall(PetscOptionsGetInt(NULL, NULL, "-M", &M, NULL)); 26 PetscCall(PetscOptionsGetInt(NULL, NULL, "-N", &N, NULL)); 27 PetscCall(PetscOptionsGetInt(NULL, NULL, "-dof", &dof, NULL)); 28 PetscCall(PetscOptionsGetInt(NULL, NULL, "-s", &s, NULL)); 29 PetscCall(PetscOptionsGetInt(NULL, NULL, "-periodic_x", &wrap, NULL)); 30 PetscCall(PetscOptionsGetInt(NULL, NULL, "-periodic_y", &wrap, NULL)); 31 32 /* Create distributed array and get vectors */ 33 PetscCall(DMDACreate2d(PETSC_COMM_WORLD, (DMBoundaryType)bx, (DMBoundaryType)by, DMDA_STENCIL_BOX, M, N, PETSC_DECIDE, PETSC_DECIDE, dof, s, NULL, NULL, &da)); 34 PetscCall(DMSetFromOptions(da)); 35 PetscCall(DMSetUp(da)); 36 PetscCall(DMDASetUniformCoordinates(da, 0.0, 1.0, 0.0, 1.0, 0.0, 0.0)); 37 for (i = 0; i < dof; i++) { 38 PetscCall(PetscSNPrintf(fname, PETSC_STATIC_ARRAY_LENGTH(fname), "Field %" PetscInt_FMT, i)); 39 PetscCall(DMDASetFieldName(da, i, fname)); 40 } 41 42 PetscCall(DMView(da, viewer)); 43 PetscCall(DMCreateGlobalVector(da, &global)); 44 PetscCall(DMCreateLocalVector(da, &local)); 45 PetscCall(DMGetCoordinates(da, &coors)); 46 PetscCall(DMGetCoordinateDM(da, &dac)); 47 48 /* Set values into global vectors */ 49 PetscCall(DMDAVecGetArrayDOFRead(dac, coors, &xy)); 50 PetscCall(DMDAVecGetArrayDOF(da, global, &aglobal)); 51 PetscCall(DMDAGetCorners(da, &xs, &ys, 0, &m, &n, 0)); 52 for (k = 0; k < dof; k++) { 53 for (j = ys; j < ys + n; j++) { 54 for (i = xs; i < xs + m; i++) aglobal[j][i][k] = PetscSinScalar(2.0 * PETSC_PI * (k + 1) * xy[j][i][0]); 55 } 56 } 57 PetscCall(DMDAVecRestoreArrayDOF(da, global, &aglobal)); 58 PetscCall(DMDAVecRestoreArrayDOFRead(dac, coors, &xy)); 59 PetscCall(DMGlobalToLocalBegin(da, global, INSERT_VALUES, local)); 60 PetscCall(DMGlobalToLocalEnd(da, global, INSERT_VALUES, local)); 61 62 PetscCall(VecSet(global, 0.0)); 63 PetscCall(DMLocalToGlobalBegin(da, local, INSERT_VALUES, global)); 64 PetscCall(DMLocalToGlobalEnd(da, local, INSERT_VALUES, global)); 65 PetscCall(VecView(global, PETSC_VIEWER_STDOUT_WORLD)); 66 PetscCall(VecView(global, viewer)); 67 68 /* Free memory */ 69 PetscCall(PetscViewerDestroy(&viewer)); 70 PetscCall(VecDestroy(&global)); 71 PetscCall(VecDestroy(&local)); 72 PetscCall(DMDestroy(&da)); 73 PetscCall(PetscFinalize()); 74 return 0; 75 } 76 77 /*TEST 78 79 test: 80 args: -dof 2 81 filter: grep -v -i Object 82 requires: x 83 84 test: 85 suffix: 2 86 nsize: 2 87 args: -dof 2 88 filter: grep -v -i Object 89 requires: x 90 91 test: 92 suffix: 3 93 nsize: 3 94 args: -dof 2 95 filter: grep -v -i Object 96 requires: x 97 98 TEST*/ 99