1 2 static char help[] = "Tests mirror boundary conditions in 2-d.\n\n"; 3 4 #include <petscdm.h> 5 #include <petscdmda.h> 6 7 int main(int argc,char **argv) 8 { 9 PetscErrorCode ierr; 10 PetscInt M = 8, N = 8,stencil_width = 1, dof = 1,m,n,xstart,ystart,i,j,c; 11 DM da; 12 Vec global,local; 13 PetscScalar ***vglobal; 14 PetscViewer sview; 15 16 ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 17 ierr = PetscOptionsGetInt(NULL,0,"-stencil_width",&stencil_width,0);CHKERRQ(ierr); 18 ierr = PetscOptionsGetInt(NULL,0,"-dof",&dof,0);CHKERRQ(ierr); 19 20 ierr = DMDACreate2d(PETSC_COMM_WORLD,DM_BOUNDARY_MIRROR,DM_BOUNDARY_MIRROR,DMDA_STENCIL_STAR,M,N,PETSC_DECIDE,PETSC_DECIDE,dof,stencil_width,NULL,NULL,&da);CHKERRQ(ierr); 21 ierr = DMSetFromOptions(da);CHKERRQ(ierr); 22 ierr = DMSetUp(da);CHKERRQ(ierr); 23 ierr = DMDAGetCorners(da,&xstart,&ystart,0,&m,&n,0);CHKERRQ(ierr); 24 25 ierr = DMCreateGlobalVector(da,&global);CHKERRQ(ierr); 26 ierr = DMDAVecGetArrayDOF(da,global,&vglobal);CHKERRQ(ierr); 27 for (j=ystart; j<ystart+n; j++) { 28 for (i=xstart; i<xstart+m; i++) { 29 for (c=0; c<dof; c++) { 30 vglobal[j][i][c] = 100*j + 10*(i+1) + c; 31 } 32 } 33 } 34 ierr = DMDAVecRestoreArrayDOF(da,global,&vglobal);CHKERRQ(ierr); 35 36 ierr = DMCreateLocalVector(da,&local);CHKERRQ(ierr); 37 ierr = DMGlobalToLocalBegin(da,global,INSERT_VALUES,local);CHKERRQ(ierr); 38 ierr = DMGlobalToLocalEnd(da,global,INSERT_VALUES,local);CHKERRQ(ierr); 39 40 ierr = PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD,PETSC_COMM_SELF,&sview);CHKERRQ(ierr); 41 ierr = VecView(local,sview);CHKERRQ(ierr); 42 ierr = PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD,PETSC_COMM_SELF,&sview);CHKERRQ(ierr); 43 ierr = PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 44 ierr = VecView(global,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 45 46 ierr = DMDestroy(&da);CHKERRQ(ierr); 47 ierr = VecDestroy(&local);CHKERRQ(ierr); 48 ierr = VecDestroy(&global);CHKERRQ(ierr); 49 50 ierr = PetscFinalize(); 51 return ierr; 52 } 53 54 55 56 57 58 59 60 /*TEST 61 62 test: 63 64 test: 65 suffix: 2 66 nsize: 4 67 filter: grep -v "Vec Object" 68 69 TEST*/ 70