1
2 static char help[] = "Tests mirror boundary conditions in 2-d.\n\n";
3
4 #include <petscdm.h>
5 #include <petscdmda.h>
6
main(int argc,char ** argv)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