Actual source code: ex24.c
petsc-3.4.5 2014-06-29
2: static char help[] = "Tests DMDALocalToGlocal() for dof > 1\n\n";
4: #include <petscdmda.h>
8: int main(int argc,char **argv)
9: {
10: PetscInt M = 6,N = 5,m = PETSC_DECIDE,n = PETSC_DECIDE,i,j,is,js,in,jen;
12: DM da;
13: Vec local,global;
14: PetscScalar ***l;
16: PetscInitialize(&argc,&argv,(char*)0,help);
18: /* Create distributed array and get vectors */
19: DMDACreate2d(PETSC_COMM_WORLD, DMDA_BOUNDARY_NONE, DMDA_BOUNDARY_NONE,DMDA_STENCIL_BOX,M,N,m,n,3,1,NULL,NULL,&da);
20: DMCreateGlobalVector(da,&global);
21: DMCreateLocalVector(da,&local);
23: DMDAGetCorners(da,&is,&js,0,&in,&jen,0);
24: DMDAVecGetArrayDOF(da,local,&l);
25: for (i=is; i<is+in; i++) {
26: for (j=js; j<js+jen; j++) {
27: l[j][i][0] = 3*(i + j*M);
28: l[j][i][1] = 3*(i + j*M) + 1;
29: l[j][i][2] = 3*(i + j*M) + 2;
30: }
31: }
32: DMDAVecRestoreArrayDOF(da,local,&l);
33: DMLocalToGlobalBegin(da,local,ADD_VALUES,global);
34: DMLocalToGlobalEnd(da,local,ADD_VALUES,global);
36: VecView(global,PETSC_VIEWER_STDOUT_WORLD);
38: /* Free memory */
39: VecDestroy(&local);
40: VecDestroy(&global);
41: DMDestroy(&da);
42: PetscFinalize();
43: return 0;
44: }