1 2 static char help[] = "Tests mirror boundary conditions in 1-d.\n\n"; 3 4 #include <petscdm.h> 5 #include <petscdmda.h> 6 7 int main(int argc,char **argv) 8 { 9 PetscInt M = 6,stencil_width = 1, dof = 1,m,xstart,i,j; 10 DM da; 11 Vec global,local; 12 PetscScalar **vglobal; 13 PetscViewer sviewer; 14 15 PetscCall(PetscInitialize(&argc,&argv,(char*)0,help)); 16 PetscCall(PetscOptionsGetInt(NULL,0,"-stencil_width",&stencil_width,0)); 17 PetscCall(PetscOptionsGetInt(NULL,0,"-dof",&dof,0)); 18 19 PetscCall(DMDACreate1d(PETSC_COMM_WORLD,DM_BOUNDARY_MIRROR,M,dof,stencil_width,NULL,&da)); 20 PetscCall(DMSetFromOptions(da)); 21 PetscCall(DMSetUp(da)); 22 PetscCall(DMDAGetCorners(da,&xstart,0,0,&m,0,0)); 23 24 PetscCall(DMCreateGlobalVector(da,&global)); 25 PetscCall(DMDAVecGetArrayDOF(da,global,&vglobal)); 26 for (i=xstart; i<xstart+m; i++) { 27 for (j=0; j<dof; j++) { 28 vglobal[i][j] = 100*(i+1) + j; 29 } 30 } 31 PetscCall(DMDAVecRestoreArrayDOF(da,global,&vglobal)); 32 33 PetscCall(DMCreateLocalVector(da,&local)); 34 PetscCall(DMGlobalToLocalBegin(da,global,INSERT_VALUES,local)); 35 PetscCall(DMGlobalToLocalEnd(da,global,INSERT_VALUES,local)); 36 37 PetscCall(PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD,PETSC_COMM_SELF,&sviewer)); 38 PetscCall(VecView(local,sviewer)); 39 PetscCall(PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD,PETSC_COMM_SELF,&sviewer)); 40 PetscCall(PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD)); 41 PetscCall(VecView(global,PETSC_VIEWER_STDOUT_WORLD)); 42 43 PetscCall(DMDestroy(&da)); 44 PetscCall(VecDestroy(&local)); 45 PetscCall(VecDestroy(&global)); 46 47 PetscCall(PetscFinalize()); 48 return 0; 49 } 50 51 /*TEST 52 53 test: 54 55 test: 56 suffix: 2 57 nsize: 2 58 filter: grep -v "Vec Object" 59 60 TEST*/ 61