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 PetscErrorCode ierr; 11 DM da,dac; 12 PetscViewer viewer; 13 Vec local,global,coors; 14 PetscScalar ***xy,***aglobal; 15 PetscDraw draw; 16 char fname[32]; 17 18 ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 19 /* Create viewers */ 20 ierr = PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"",PETSC_DECIDE,PETSC_DECIDE,600,200,&viewer);CHKERRQ(ierr); 21 ierr = PetscViewerDrawGetDraw(viewer,0,&draw);CHKERRQ(ierr); 22 ierr = PetscDrawSetDoubleBuffer(draw);CHKERRQ(ierr); 23 24 /* Read options */ 25 ierr = PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL);CHKERRQ(ierr); 26 ierr = PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL);CHKERRQ(ierr); 27 ierr = PetscOptionsGetInt(NULL,NULL,"-dof",&dof,NULL);CHKERRQ(ierr); 28 ierr = PetscOptionsGetInt(NULL,NULL,"-s",&s,NULL);CHKERRQ(ierr); 29 ierr = PetscOptionsGetInt(NULL,NULL,"-periodic_x",&wrap,NULL);CHKERRQ(ierr); 30 ierr = PetscOptionsGetInt(NULL,NULL,"-periodic_y",&wrap,NULL);CHKERRQ(ierr); 31 32 /* Create distributed array and get vectors */ 33 ierr = DMDACreate2d(PETSC_COMM_WORLD,(DMBoundaryType)bx,(DMBoundaryType)by,DMDA_STENCIL_BOX,M,N,PETSC_DECIDE,PETSC_DECIDE,dof,s,NULL,NULL,&da);CHKERRQ(ierr); 34 ierr = DMSetFromOptions(da);CHKERRQ(ierr); 35 ierr = DMSetUp(da);CHKERRQ(ierr); 36 ierr = DMDASetUniformCoordinates(da,0.0,1.0,0.0,1.0,0.0,0.0);CHKERRQ(ierr); 37 for (i=0; i<dof; i++) { 38 sprintf(fname,"Field %d",(int)i); 39 ierr = DMDASetFieldName(da,i,fname);CHKERRQ(ierr); 40 } 41 42 ierr = DMView(da,viewer);CHKERRQ(ierr); 43 ierr = DMCreateGlobalVector(da,&global);CHKERRQ(ierr); 44 ierr = DMCreateLocalVector(da,&local);CHKERRQ(ierr); 45 ierr = DMGetCoordinates(da,&coors);CHKERRQ(ierr); 46 ierr = DMGetCoordinateDM(da,&dac);CHKERRQ(ierr); 47 48 /* Set values into global vectors */ 49 ierr = DMDAVecGetArrayDOFRead(dac,coors,&xy);CHKERRQ(ierr); 50 ierr = DMDAVecGetArrayDOF(da,global,&aglobal);CHKERRQ(ierr); 51 ierr = DMDAGetCorners(da,&xs,&ys,0,&m,&n,0);CHKERRQ(ierr); 52 for (k=0; k<dof; k++) { 53 for (j=ys; j<ys+n; j++) { 54 for (i=xs; i<xs+m; i++) { 55 aglobal[j][i][k] = PetscSinScalar(2.0*PETSC_PI*(k+1)*xy[j][i][0]); 56 } 57 } 58 } 59 ierr = DMDAVecRestoreArrayDOF(da,global,&aglobal);CHKERRQ(ierr); 60 ierr = DMDAVecRestoreArrayDOFRead(dac,coors,&xy);CHKERRQ(ierr); 61 ierr = DMGlobalToLocalBegin(da,global,INSERT_VALUES,local);CHKERRQ(ierr); 62 ierr = DMGlobalToLocalEnd(da,global,INSERT_VALUES,local);CHKERRQ(ierr); 63 64 ierr = VecSet(global,0.0);CHKERRQ(ierr); 65 ierr = DMLocalToGlobalBegin(da,local,INSERT_VALUES,global);CHKERRQ(ierr); 66 ierr = DMLocalToGlobalEnd(da,local,INSERT_VALUES,global);CHKERRQ(ierr); 67 ierr = VecView(global,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 68 ierr = VecView(global,viewer);CHKERRQ(ierr); 69 70 /* Free memory */ 71 ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr); 72 ierr = VecDestroy(&global);CHKERRQ(ierr); 73 ierr = VecDestroy(&local);CHKERRQ(ierr); 74 ierr = DMDestroy(&da);CHKERRQ(ierr); 75 ierr = PetscFinalize(); 76 return ierr; 77 } 78 79 /*TEST 80 81 test: 82 args: -dof 2 83 filter: grep -v -i Object 84 requires: x 85 86 test: 87 suffix: 2 88 nsize: 2 89 args: -dof 2 90 filter: grep -v -i Object 91 requires: x 92 93 test: 94 suffix: 3 95 nsize: 3 96 args: -dof 2 97 filter: grep -v -i Object 98 requires: x 99 100 TEST*/ 101