1 2 static char help[] = "Tests mirror boundary conditions in 3-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 = 2, N = 3, P = 4,stencil_width = 1, dof = 1,m,n,p,xstart,ystart,zstart,i,j,k,c; 11 DM da; 12 Vec global,local; 13 PetscScalar ****vglobal; 14 PetscViewer sview; 15 PetscScalar sum; 16 17 ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 18 ierr = PetscOptionsGetInt(NULL,0,"-stencil_width",&stencil_width,0);CHKERRQ(ierr); 19 ierr = PetscOptionsGetInt(NULL,0,"-dof",&dof,0);CHKERRQ(ierr); 20 21 ierr = DMDACreate3d(PETSC_COMM_WORLD,DM_BOUNDARY_MIRROR,DM_BOUNDARY_MIRROR,DM_BOUNDARY_MIRROR,DMDA_STENCIL_STAR,M,N,P,PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE,dof,stencil_width,NULL,NULL,NULL,&da);CHKERRQ(ierr); 22 ierr = DMSetFromOptions(da);CHKERRQ(ierr); 23 ierr = DMSetUp(da);CHKERRQ(ierr); 24 ierr = DMDAGetCorners(da,&xstart,&ystart,&zstart,&m,&n,&p);CHKERRQ(ierr); 25 26 ierr = DMCreateGlobalVector(da,&global);CHKERRQ(ierr); 27 ierr = DMDAVecGetArrayDOF(da,global,&vglobal);CHKERRQ(ierr); 28 for (k=zstart; k<zstart+p; k++) { 29 for (j=ystart; j<ystart+n; j++) { 30 for (i=xstart; i<xstart+m; i++) { 31 for (c=0; c<dof; c++) { 32 vglobal[k][j][i][c] = 1000*k + 100*j + 10*i + c; 33 } 34 } 35 } 36 } 37 ierr = DMDAVecRestoreArrayDOF(da,global,&vglobal);CHKERRQ(ierr); 38 39 ierr = DMCreateLocalVector(da,&local);CHKERRQ(ierr); 40 ierr = DMGlobalToLocalBegin(da,global,ADD_VALUES,local);CHKERRQ(ierr); 41 ierr = DMGlobalToLocalEnd(da,global,ADD_VALUES,local);CHKERRQ(ierr); 42 43 ierr = VecSum(local,&sum);CHKERRQ(ierr); 44 ierr = PetscSynchronizedPrintf(PETSC_COMM_WORLD,"sum %g\n",(double)PetscRealPart(sum));CHKERRQ(ierr); 45 ierr = PetscSynchronizedFlush(PETSC_COMM_WORLD,stdout);CHKERRQ(ierr); 46 ierr = PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD,PETSC_COMM_SELF,&sview);CHKERRQ(ierr); 47 ierr = VecView(local,sview);CHKERRQ(ierr); 48 ierr = PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD,PETSC_COMM_SELF,&sview);CHKERRQ(ierr); 49 ierr = PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 50 51 ierr = DMDestroy(&da);CHKERRQ(ierr); 52 ierr = VecDestroy(&local);CHKERRQ(ierr); 53 ierr = VecDestroy(&global);CHKERRQ(ierr); 54 55 ierr = PetscFinalize(); 56 return ierr; 57 } 58 59 /*TEST 60 61 test: 62 63 test: 64 suffix: 2 65 nsize: 3 66 67 TEST*/ 68 69