1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests DMDAGetElements() and VecView() contour plotting for 2d DMDAs.\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscdm.h> 5c4762a1bSJed Brown #include <petscdmda.h> 6c4762a1bSJed Brown #include <petscdraw.h> 7c4762a1bSJed Brown 8*d71ae5a4SJacob Faibussowitsch int main(int argc, char **argv) 9*d71ae5a4SJacob Faibussowitsch { 10c4762a1bSJed Brown PetscInt M = 10, N = 8, ne, nc, i; 11c4762a1bSJed Brown const PetscInt *e; 12c4762a1bSJed Brown PetscBool flg = PETSC_FALSE; 13c4762a1bSJed Brown DM da; 14c4762a1bSJed Brown PetscViewer viewer; 15c4762a1bSJed Brown Vec local, global; 16c4762a1bSJed Brown PetscScalar value; 17c4762a1bSJed Brown DMBoundaryType bx = DM_BOUNDARY_NONE, by = DM_BOUNDARY_NONE; 18c4762a1bSJed Brown DMDAStencilType stype = DMDA_STENCIL_BOX; 19c4762a1bSJed Brown PetscScalar *lv; 20c4762a1bSJed Brown 21327415f7SBarry Smith PetscFunctionBeginUser; 229566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &argv, (char *)0, help)); 239566063dSJacob Faibussowitsch PetscCall(PetscViewerDrawOpen(PETSC_COMM_WORLD, 0, "", 300, 0, 300, 300, &viewer)); 24c4762a1bSJed Brown 25c4762a1bSJed Brown /* Read options */ 269566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL, NULL, "-M", &M, NULL)); 279566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL, NULL, "-N", &N, NULL)); 289566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetBool(NULL, NULL, "-star_stencil", &flg, NULL)); 29c4762a1bSJed Brown if (flg) stype = DMDA_STENCIL_STAR; 30c4762a1bSJed Brown 31c4762a1bSJed Brown /* Create distributed array and get vectors */ 329566063dSJacob Faibussowitsch PetscCall(DMDACreate2d(PETSC_COMM_WORLD, bx, by, stype, M, N, PETSC_DECIDE, PETSC_DECIDE, 1, 1, NULL, NULL, &da)); 339566063dSJacob Faibussowitsch PetscCall(DMSetFromOptions(da)); 349566063dSJacob Faibussowitsch PetscCall(DMSetUp(da)); 359566063dSJacob Faibussowitsch PetscCall(DMCreateGlobalVector(da, &global)); 369566063dSJacob Faibussowitsch PetscCall(DMCreateLocalVector(da, &local)); 37c4762a1bSJed Brown 38c4762a1bSJed Brown value = -3.0; 399566063dSJacob Faibussowitsch PetscCall(VecSet(global, value)); 409566063dSJacob Faibussowitsch PetscCall(DMGlobalToLocalBegin(da, global, INSERT_VALUES, local)); 419566063dSJacob Faibussowitsch PetscCall(DMGlobalToLocalEnd(da, global, INSERT_VALUES, local)); 42c4762a1bSJed Brown 439566063dSJacob Faibussowitsch PetscCall(DMDASetElementType(da, DMDA_ELEMENT_P1)); 449566063dSJacob Faibussowitsch PetscCall(DMDAGetElements(da, &ne, &nc, &e)); 459566063dSJacob Faibussowitsch PetscCall(VecGetArray(local, &lv)); 46c4762a1bSJed Brown for (i = 0; i < ne; i++) { 4763a3b9bcSJacob Faibussowitsch PetscCall(PetscSynchronizedPrintf(PETSC_COMM_WORLD, "i %" PetscInt_FMT " e[3*i] %" PetscInt_FMT " %" PetscInt_FMT " %" PetscInt_FMT "\n", i, e[3 * i], e[3 * i + 1], e[3 * i + 2])); 48c4762a1bSJed Brown lv[e[3 * i]] = i; 49c4762a1bSJed Brown } 509566063dSJacob Faibussowitsch PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD, stdout)); 519566063dSJacob Faibussowitsch PetscCall(VecRestoreArray(local, &lv)); 529566063dSJacob Faibussowitsch PetscCall(DMDARestoreElements(da, &ne, &nc, &e)); 53c4762a1bSJed Brown 549566063dSJacob Faibussowitsch PetscCall(DMLocalToGlobalBegin(da, local, ADD_VALUES, global)); 559566063dSJacob Faibussowitsch PetscCall(DMLocalToGlobalEnd(da, local, ADD_VALUES, global)); 56c4762a1bSJed Brown 579566063dSJacob Faibussowitsch PetscCall(DMView(da, viewer)); 589566063dSJacob Faibussowitsch PetscCall(VecView(global, viewer)); 59c4762a1bSJed Brown 60c4762a1bSJed Brown /* Free memory */ 619566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&viewer)); 629566063dSJacob Faibussowitsch PetscCall(VecDestroy(&local)); 639566063dSJacob Faibussowitsch PetscCall(VecDestroy(&global)); 649566063dSJacob Faibussowitsch PetscCall(DMDestroy(&da)); 659566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 66b122ec5aSJacob Faibussowitsch return 0; 67c4762a1bSJed Brown } 68c4762a1bSJed Brown 69c4762a1bSJed Brown /*TEST 70c4762a1bSJed Brown 71c4762a1bSJed Brown test: 72c4762a1bSJed Brown requires: x 73c4762a1bSJed Brown 74c4762a1bSJed Brown test: 75c4762a1bSJed Brown suffix: 2 76c4762a1bSJed Brown nsize: 2 77c4762a1bSJed Brown requires: x 78c4762a1bSJed Brown 79c4762a1bSJed Brown TEST*/ 80