1*c4762a1bSJed Brown 2*c4762a1bSJed Brown static char help[] = "Tests DMDAGetElements() and VecView() contour plotting for 2d DMDAs.\n\n"; 3*c4762a1bSJed Brown 4*c4762a1bSJed Brown 5*c4762a1bSJed Brown #include <petscdm.h> 6*c4762a1bSJed Brown #include <petscdmda.h> 7*c4762a1bSJed Brown #include <petscdraw.h> 8*c4762a1bSJed Brown 9*c4762a1bSJed Brown int main(int argc,char **argv) 10*c4762a1bSJed Brown { 11*c4762a1bSJed Brown PetscInt M = 10,N = 8,ne,nc,i; 12*c4762a1bSJed Brown const PetscInt *e; 13*c4762a1bSJed Brown PetscErrorCode ierr; 14*c4762a1bSJed Brown PetscBool flg = PETSC_FALSE; 15*c4762a1bSJed Brown DM da; 16*c4762a1bSJed Brown PetscViewer viewer; 17*c4762a1bSJed Brown Vec local,global; 18*c4762a1bSJed Brown PetscScalar value; 19*c4762a1bSJed Brown DMBoundaryType bx = DM_BOUNDARY_NONE,by = DM_BOUNDARY_NONE; 20*c4762a1bSJed Brown DMDAStencilType stype = DMDA_STENCIL_BOX; 21*c4762a1bSJed Brown PetscScalar *lv; 22*c4762a1bSJed Brown 23*c4762a1bSJed Brown ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 24*c4762a1bSJed Brown ierr = PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"",300,0,300,300,&viewer);CHKERRQ(ierr); 25*c4762a1bSJed Brown 26*c4762a1bSJed Brown /* Read options */ 27*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL);CHKERRQ(ierr); 28*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL);CHKERRQ(ierr); 29*c4762a1bSJed Brown ierr = PetscOptionsGetBool(NULL,NULL,"-star_stencil",&flg,NULL);CHKERRQ(ierr); 30*c4762a1bSJed Brown if (flg) stype = DMDA_STENCIL_STAR; 31*c4762a1bSJed Brown 32*c4762a1bSJed Brown /* Create distributed array and get vectors */ 33*c4762a1bSJed Brown ierr = DMDACreate2d(PETSC_COMM_WORLD,bx,by,stype,M,N,PETSC_DECIDE,PETSC_DECIDE,1,1,NULL,NULL,&da);CHKERRQ(ierr); 34*c4762a1bSJed Brown ierr = DMSetFromOptions(da);CHKERRQ(ierr); 35*c4762a1bSJed Brown ierr = DMSetUp(da);CHKERRQ(ierr); 36*c4762a1bSJed Brown ierr = DMCreateGlobalVector(da,&global);CHKERRQ(ierr); 37*c4762a1bSJed Brown ierr = DMCreateLocalVector(da,&local);CHKERRQ(ierr); 38*c4762a1bSJed Brown 39*c4762a1bSJed Brown value = -3.0; 40*c4762a1bSJed Brown ierr = VecSet(global,value);CHKERRQ(ierr); 41*c4762a1bSJed Brown ierr = DMGlobalToLocalBegin(da,global,INSERT_VALUES,local);CHKERRQ(ierr); 42*c4762a1bSJed Brown ierr = DMGlobalToLocalEnd(da,global,INSERT_VALUES,local);CHKERRQ(ierr); 43*c4762a1bSJed Brown 44*c4762a1bSJed Brown ierr = DMDASetElementType(da,DMDA_ELEMENT_P1);CHKERRQ(ierr); 45*c4762a1bSJed Brown ierr = DMDAGetElements(da,&ne,&nc,&e);CHKERRQ(ierr); 46*c4762a1bSJed Brown ierr = VecGetArray(local,&lv);CHKERRQ(ierr); 47*c4762a1bSJed Brown for (i=0; i<ne; i++) { 48*c4762a1bSJed Brown ierr = PetscSynchronizedPrintf(PETSC_COMM_WORLD,"i %D e[3*i] %D %D %D\n",i,e[3*i],e[3*i+1],e[3*i+2]);CHKERRQ(ierr); 49*c4762a1bSJed Brown lv[e[3*i]] = i; 50*c4762a1bSJed Brown } 51*c4762a1bSJed Brown ierr = PetscSynchronizedFlush(PETSC_COMM_WORLD,stdout);CHKERRQ(ierr); 52*c4762a1bSJed Brown ierr = VecRestoreArray(local,&lv);CHKERRQ(ierr); 53*c4762a1bSJed Brown ierr = DMDARestoreElements(da,&ne,&nc,&e);CHKERRQ(ierr); 54*c4762a1bSJed Brown 55*c4762a1bSJed Brown ierr = DMLocalToGlobalBegin(da,local,ADD_VALUES,global);CHKERRQ(ierr); 56*c4762a1bSJed Brown ierr = DMLocalToGlobalEnd(da,local,ADD_VALUES,global);CHKERRQ(ierr); 57*c4762a1bSJed Brown 58*c4762a1bSJed Brown ierr = DMView(da,viewer);CHKERRQ(ierr); 59*c4762a1bSJed Brown ierr = VecView(global,viewer);CHKERRQ(ierr); 60*c4762a1bSJed Brown 61*c4762a1bSJed Brown /* Free memory */ 62*c4762a1bSJed Brown ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr); 63*c4762a1bSJed Brown ierr = VecDestroy(&local);CHKERRQ(ierr); 64*c4762a1bSJed Brown ierr = VecDestroy(&global);CHKERRQ(ierr); 65*c4762a1bSJed Brown ierr = DMDestroy(&da);CHKERRQ(ierr); 66*c4762a1bSJed Brown ierr = PetscFinalize(); 67*c4762a1bSJed Brown return ierr; 68*c4762a1bSJed Brown } 69*c4762a1bSJed Brown 70*c4762a1bSJed Brown 71*c4762a1bSJed Brown 72*c4762a1bSJed Brown /*TEST 73*c4762a1bSJed Brown 74*c4762a1bSJed Brown test: 75*c4762a1bSJed Brown requires: x 76*c4762a1bSJed Brown 77*c4762a1bSJed Brown test: 78*c4762a1bSJed Brown suffix: 2 79*c4762a1bSJed Brown nsize: 2 80*c4762a1bSJed Brown requires: x 81*c4762a1bSJed Brown 82*c4762a1bSJed Brown TEST*/ 83