Actual source code: ex25.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,P = 4, m = PETSC_DECIDE,n = PETSC_DECIDE,p = PETSC_DECIDE,i,j,k,is,js,ks,in,jen,kn;
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: DMDACreate3d(PETSC_COMM_WORLD,DMDA_BOUNDARY_NONE,DMDA_BOUNDARY_NONE,DMDA_BOUNDARY_NONE,DMDA_STENCIL_BOX,M,N,P,m,n,p,2,1,NULL,NULL,NULL,&da);
20: DMCreateGlobalVector(da,&global);
21: DMCreateLocalVector(da,&local);
23: DMDAGetCorners(da,&is,&js,&ks,&in,&jen,&kn);
24: DMDAVecGetArrayDOF(da,local,&l);
25: for (i=is; i<is+in; i++) {
26: for (j=js; j<js+jen; j++) {
27: for (k=ks; k<ks+kn; k++) {
28: l[k][j][i][0] = 2*(i + j*M + k*M*N);
29: l[k][j][i][1] = 2*(i + j*M + k*M*N) + 1;
30: }
31: }
32: }
33: DMDAVecRestoreArrayDOF(da,local,&l);
34: DMLocalToGlobalBegin(da,local,ADD_VALUES,global);
35: DMLocalToGlobalEnd(da,local,ADD_VALUES,global);
37: VecView(global,PETSC_VIEWER_STDOUT_WORLD);
39: /* Free memory */
40: VecDestroy(&local);
41: VecDestroy(&global);
42: DMDestroy(&da);
43: PetscFinalize();
44: return 0;
45: }