Actual source code: ex17.c
2: static char help[] = "Tests DA interpolation for coarse DA on a subset of processors.\n\n";
4: #include petscda.h
8: int main(int argc,char **argv)
9: {
10: PetscInt M = 14,dof = 1,s = 1,ratio = 2,dim = 2;
12: DA da_c,da_f;
13: Vec v_c,v_f;
14: Mat I;
15: PetscScalar one = 1.0;
16: MPI_Comm comm_f, comm_c;
18: PetscInitialize(&argc,&argv,(char*)0,help);
20: PetscOptionsGetInt(PETSC_NULL,"-dim",&dim,PETSC_NULL);
21: PetscOptionsGetInt(PETSC_NULL,"-M",&M,PETSC_NULL);
22: PetscOptionsGetInt(PETSC_NULL,"-sw",&s,PETSC_NULL);
23: PetscOptionsGetInt(PETSC_NULL,"-ratio",&ratio,PETSC_NULL);
24: PetscOptionsGetInt(PETSC_NULL,"-dof",&dof,PETSC_NULL);
26: comm_f = PETSC_COMM_WORLD;
27: DASplitComm2d(comm_f,M,M,s,&comm_c);
28:
29: /* Set up the array */
30: if (dim == 2) {
31: DACreate2d(comm_c,DA_NONPERIODIC,DA_STENCIL_BOX,M,M,PETSC_DECIDE,PETSC_DECIDE,dof,s,PETSC_NULL,PETSC_NULL,&da_c);
32: M = ratio*(M-1) + 1;
33: DACreate2d(comm_f,DA_NONPERIODIC,DA_STENCIL_BOX,M,M,PETSC_DECIDE,PETSC_DECIDE,dof,s,PETSC_NULL,PETSC_NULL,&da_f);
34: } else if (dim == 3) {
35: ;
36: }
38: DACreateGlobalVector(da_c,&v_c);
39: DACreateGlobalVector(da_f,&v_f);
41: VecSet(v_c,one);
42: DAGetInterpolation(da_c,da_f,&I,PETSC_NULL);
43: MatInterpolate(I,v_c,v_f);
44: VecView(v_f,PETSC_VIEWER_STDOUT_(comm_f));
45: MatRestrict(I,v_f,v_c);
46: VecView(v_c,PETSC_VIEWER_STDOUT_(comm_c));
48: MatDestroy(I);
49: VecDestroy(v_c);
50: DADestroy(da_c);
51: VecDestroy(v_f);
52: DADestroy(da_f);
53: PetscFinalize();
54: return 0;
55: }
56: