Actual source code: ex15.c
2: static char help[] = "Tests DMDA interpolation.\n\n";
4: #include <petscdm.h>
5: #include <petscdmda.h>
7: int main(int argc,char **argv)
8: {
9: PetscInt M1 = 3,M2,dof = 1,s = 1,ratio = 2,dim = 1;
10: DM da_c,da_f;
11: Vec v_c,v_f;
12: Mat Interp;
13: PetscScalar one = 1.0;
14: PetscBool pt;
15: DMBoundaryType bx = DM_BOUNDARY_NONE,by = DM_BOUNDARY_NONE,bz = DM_BOUNDARY_NONE;
17: PetscInitialize(&argc,&argv,(char*)0,help);
18: PetscOptionsGetInt(NULL,NULL,"-dim",&dim,NULL);
19: PetscOptionsGetInt(NULL,NULL,"-M",&M1,NULL);
20: PetscOptionsGetInt(NULL,NULL,"-stencil_width",&s,NULL);
21: PetscOptionsGetInt(NULL,NULL,"-ratio",&ratio,NULL);
22: PetscOptionsGetInt(NULL,NULL,"-dof",&dof,NULL);
23: PetscOptionsGetBool(NULL,NULL,"-periodic",(PetscBool*)&pt,NULL);
25: if (pt) {
26: if (dim > 0) bx = DM_BOUNDARY_PERIODIC;
27: if (dim > 1) by = DM_BOUNDARY_PERIODIC;
28: if (dim > 2) bz = DM_BOUNDARY_PERIODIC;
29: }
30: if (bx == DM_BOUNDARY_NONE) {
31: M2 = ratio*(M1-1) + 1;
32: } else {
33: M2 = ratio*M1;
34: }
36: /* Set up the array */
37: if (dim == 1) {
38: DMDACreate1d(PETSC_COMM_WORLD,bx,M1,dof,s,NULL,&da_c);
39: DMDACreate1d(PETSC_COMM_WORLD,bx,M2,dof,s,NULL,&da_f);
40: } else if (dim == 2) {
41: DMDACreate2d(PETSC_COMM_WORLD,bx,by,DMDA_STENCIL_BOX,M1,M1,PETSC_DECIDE,PETSC_DECIDE,dof,s,NULL,NULL,&da_c);
42: DMDACreate2d(PETSC_COMM_WORLD,bx,by,DMDA_STENCIL_BOX,M2,M2,PETSC_DECIDE,PETSC_DECIDE,dof,s,NULL,NULL,&da_f);
43: } else if (dim == 3) {
44: DMDACreate3d(PETSC_COMM_WORLD,bx,by,bz,DMDA_STENCIL_BOX,M1,M1,M1,PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE,dof,s,NULL,NULL,NULL,&da_c);
45: DMDACreate3d(PETSC_COMM_WORLD,bx,by,bz,DMDA_STENCIL_BOX,M2,M2,M2,PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE,dof,s,NULL,NULL,NULL,&da_f);
46: } else SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_SUP,"dim must be 1,2, or 3");
47: DMSetFromOptions(da_c);
48: DMSetUp(da_c);
49: DMSetFromOptions(da_f);
50: DMSetUp(da_f);
52: DMCreateGlobalVector(da_c,&v_c);
53: DMCreateGlobalVector(da_f,&v_f);
55: VecSet(v_c,one);
56: DMCreateInterpolation(da_c,da_f,&Interp,NULL);
57: MatMult(Interp,v_c,v_f);
58: VecView(v_f,PETSC_VIEWER_STDOUT_WORLD);
59: MatMultTranspose(Interp,v_f,v_c);
60: VecView(v_c,PETSC_VIEWER_STDOUT_WORLD);
62: MatDestroy(&Interp);
63: VecDestroy(&v_c);
64: DMDestroy(&da_c);
65: VecDestroy(&v_f);
66: DMDestroy(&da_f);
67: PetscFinalize();
68: return 0;
69: }