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 8c4762a1bSJed Brown int main(int argc,char **argv) 9c4762a1bSJed Brown { 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 219566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&argv,(char*)0,help)); 229566063dSJacob Faibussowitsch PetscCall(PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"",300,0,300,300,&viewer)); 23c4762a1bSJed Brown 24c4762a1bSJed Brown /* Read options */ 259566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL)); 269566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL)); 279566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetBool(NULL,NULL,"-star_stencil",&flg,NULL)); 28c4762a1bSJed Brown if (flg) stype = DMDA_STENCIL_STAR; 29c4762a1bSJed Brown 30c4762a1bSJed Brown /* Create distributed array and get vectors */ 319566063dSJacob Faibussowitsch PetscCall(DMDACreate2d(PETSC_COMM_WORLD,bx,by,stype,M,N,PETSC_DECIDE,PETSC_DECIDE,1,1,NULL,NULL,&da)); 329566063dSJacob Faibussowitsch PetscCall(DMSetFromOptions(da)); 339566063dSJacob Faibussowitsch PetscCall(DMSetUp(da)); 349566063dSJacob Faibussowitsch PetscCall(DMCreateGlobalVector(da,&global)); 359566063dSJacob Faibussowitsch PetscCall(DMCreateLocalVector(da,&local)); 36c4762a1bSJed Brown 37c4762a1bSJed Brown value = -3.0; 389566063dSJacob Faibussowitsch PetscCall(VecSet(global,value)); 399566063dSJacob Faibussowitsch PetscCall(DMGlobalToLocalBegin(da,global,INSERT_VALUES,local)); 409566063dSJacob Faibussowitsch PetscCall(DMGlobalToLocalEnd(da,global,INSERT_VALUES,local)); 41c4762a1bSJed Brown 429566063dSJacob Faibussowitsch PetscCall(DMDASetElementType(da,DMDA_ELEMENT_P1)); 439566063dSJacob Faibussowitsch PetscCall(DMDAGetElements(da,&ne,&nc,&e)); 449566063dSJacob Faibussowitsch PetscCall(VecGetArray(local,&lv)); 45c4762a1bSJed Brown for (i=0; i<ne; i++) { 46*63a3b9bcSJacob 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])); 47c4762a1bSJed Brown lv[e[3*i]] = i; 48c4762a1bSJed Brown } 499566063dSJacob Faibussowitsch PetscCall(PetscSynchronizedFlush(PETSC_COMM_WORLD,stdout)); 509566063dSJacob Faibussowitsch PetscCall(VecRestoreArray(local,&lv)); 519566063dSJacob Faibussowitsch PetscCall(DMDARestoreElements(da,&ne,&nc,&e)); 52c4762a1bSJed Brown 539566063dSJacob Faibussowitsch PetscCall(DMLocalToGlobalBegin(da,local,ADD_VALUES,global)); 549566063dSJacob Faibussowitsch PetscCall(DMLocalToGlobalEnd(da,local,ADD_VALUES,global)); 55c4762a1bSJed Brown 569566063dSJacob Faibussowitsch PetscCall(DMView(da,viewer)); 579566063dSJacob Faibussowitsch PetscCall(VecView(global,viewer)); 58c4762a1bSJed Brown 59c4762a1bSJed Brown /* Free memory */ 609566063dSJacob Faibussowitsch PetscCall(PetscViewerDestroy(&viewer)); 619566063dSJacob Faibussowitsch PetscCall(VecDestroy(&local)); 629566063dSJacob Faibussowitsch PetscCall(VecDestroy(&global)); 639566063dSJacob Faibussowitsch PetscCall(DMDestroy(&da)); 649566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 65b122ec5aSJacob Faibussowitsch return 0; 66c4762a1bSJed Brown } 67c4762a1bSJed Brown 68c4762a1bSJed Brown /*TEST 69c4762a1bSJed Brown 70c4762a1bSJed Brown test: 71c4762a1bSJed Brown requires: x 72c4762a1bSJed Brown 73c4762a1bSJed Brown test: 74c4762a1bSJed Brown suffix: 2 75c4762a1bSJed Brown nsize: 2 76c4762a1bSJed Brown requires: x 77c4762a1bSJed Brown 78c4762a1bSJed Brown TEST*/ 79