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